Ale sa come si fa. Alexandre Pato, ex predestinato del calcio, ha dovuto passare in realtà attraverso alti e bassi notevoli. Uno dei picchi è stato il derby del 3 aprile 2011, fondamentale per la conquista dello scudetto del Milan firmato Allegri, l?ultimo, per ora, della storia rossonera. In quella stagione Pato segnò 14 gol in campionato, come Ibrahimovic e Robinho. Oggi ha passato i trenta, gioca nella Mls ma sogna un ritorno e tifa per Rafael Leao. “Ci sentiamo ogni tanto. Ha talento e questo Milan sa avere pazienza con i giovani. Maldini è una garanzia e sa quello che serve ai giocatori”.
Journal Reference:
- Youngrong Park, Ananiya A. Demessie, Addie Luo, Olena R. Taratula, Abraham S. Moses, Peter Do, Leonardo Campos, Younes Jahangiri, Cory R. Wyatt, Hassan A. Albarqi, Khashayar Farsad, Ov D. Slayden, Oleh Taratula. Targeted Nanoparticles with High Heating Efficiency for the Treatment of Endometriosis with Systemically Delivered Magnetic Hyperthermia. Small, 2022; 2107808 DOI: 10.1002/smll.202107808
The research led by Oleh Taratula of the Oregon State University College of Pharmacy and Ov Slayden of the Oregon National Primate Research Center at Oregon Health & Science University involves magnetic nanoparticles ? tiny pieces of matter as small as one-billionth of a meter.
The animal-model study, published today in the journal Small, shows that the iron oxide nanoparticles, injected intravenously, act as a contrast agent ? they accumulate in the lesions, making them easier to see by advanced imaging such as MRI.
And when exposed to an alternating magnetic field, a non-invasive procedure, the nanoparticles? temperature soars to more than 120 degrees Fahrenheit, high enough for lesion removal via heat.
?Endometriosis is a debilitating, systemic disease, and the need for an efficient, non-surgical method of removing the lesions is urgent,? Taratula said. ?We invented targeted nanoparticles with extraordinary heating capabilities that enable the use of magnetic hyperthermia for the safe and efficient elimination of endometriosis lesions.?
The endometrium is the innermost layer of the uterus, and endometriosis occurs when endometrium-like tissue forms lesions outside of the uterine cavity ? usually involving the ovaries, the fallopian tubes and the tissue lining the pelvis.
On rare occasions, endometrial tissue may spread beyond the pelvic region.
Roughly 10% of childbearing-age women will experience endometriosis, according to the World Health Organization, and 35% to 50% of women with pelvic pain and or infertility suffer from the disorder. Globally, endometriosis affects about 190 million women, according to the WHO.
There?s no cure for endometriosis, although surgical removal of the lesions can improve fertility. The downside, however, is that the lesions come back about half the time, and more than one-quarter of endometriosis surgery patients need three or more operations because it?s hard to find all of the diseased tissue that needs to be removed.
?Endometriosis is a non-malignant condition, but the lesions sometimes perforate organs, resulting in a life-threatening situation,? said Olena Taratula of the College of Pharmacy, who also collaborated on the study. ?Therapies for pain result in infertility, and patients wishing to improve fertility often seek surgical removal of the lesions. And unfortunately, not only is the recurrence rate high, complications associated with surgery add to the overall risk.?
Magnetic hyperthermia had not previously been considered as a potential means of ablating endometriosis lesions because other magnetic nanoparticles have relatively low heating efficiency, she said. The nanoparticles could only get hot enough after being directly injected into diseased tissue, which is not a realistic approach for endometriosis.
The collaboration that also included the College of Pharmacy?s Youngrong Park, Abraham Moses, Peter Do and Ananiya Demessie overcame that problem by developing hexagonal-shaped nanoparticles that have more than six times the heating efficiency of conventional spherical nanoparticles when subjected to an alternating magnetic field.
Modifying the nanoparticles with a peptide ? multiple amino acids linked in a chain ? that targets a cellular receptor abundant in endometriosis cells enhanced their ability to accumulate in endometriosis lesions, the scientists said. Studies of mice with endometriotic tissue transplanted from macaques demonstrated the nanoparticles? ability to eradicate the diseased cells following one session of magnetic hyperthermia.
?Furthermore, in collaboration with Khashayar Farsad from OHSU?s Dotter Interventional Institute, we showed the efficiency of the same nanoparticles as an MRI contrast agent,? Oleh Taratula said. ?This feature of the nanoparticles can aid in the diagnosis of endometriotic lesions by MRI before their exposure to the external alternating magnetic field.?
Also part of the project group were Addie Luo of the Oregon National Primate Research Center; Cory Wyatt of the OHSU Department of Diagnostic Radiology; Leonardo Campos and Younes Jahangiri of the Dotter Interventional Institute; Hassan Albarqi of Najran University in Saudi Arabia; and Parinaz Ghanbari, who helped prepare the graphical abstract illustrating the research.
Oleh and Olena Taratula each has an adjunct appointment with OHSU.
The National Institutes of Health, the Eunice Kennedy Shriver National Institute of Child Health and Human Development, the National Primate Research Center and the OSU College of Pharmacy supported this study.
We would love to say thanks to the writer of this short article for this outstanding content
Nanoparticles show promise for finding, removing endometriosis lesions
Journal Reference:
- Youngrong Park, Ananiya A. Demessie, Addie Luo, Olena R. Taratula, Abraham S. Moses, Peter Do, Leonardo Campos, Younes Jahangiri, Cory R. Wyatt, Hassan A. Albarqi, Khashayar Farsad, Ov D. Slayden, Oleh Taratula. Targeted Nanoparticles with High Heating Efficiency for the Treatment of Endometriosis with Systemically Delivered Magnetic Hyperthermia. Small, 2022; 2107808 DOI: 10.1002/smll.202107808
The research led by Oleh Taratula of the Oregon State University College of Pharmacy and Ov Slayden of the Oregon National Primate Research Center at Oregon Health & Science University involves magnetic nanoparticles ? tiny pieces of matter as small as one-billionth of a meter.
The animal-model study, published today in the journal Small, shows that the iron oxide nanoparticles, injected intravenously, act as a contrast agent ? they accumulate in the lesions, making them easier to see by advanced imaging such as MRI.
And when exposed to an alternating magnetic field, a non-invasive procedure, the nanoparticles? temperature soars to more than 120 degrees Fahrenheit, high enough for lesion removal via heat.
?Endometriosis is a debilitating, systemic disease, and the need for an efficient, non-surgical method of removing the lesions is urgent,? Taratula said. ?We invented targeted nanoparticles with extraordinary heating capabilities that enable the use of magnetic hyperthermia for the safe and efficient elimination of endometriosis lesions.?
The endometrium is the innermost layer of the uterus, and endometriosis occurs when endometrium-like tissue forms lesions outside of the uterine cavity ? usually involving the ovaries, the fallopian tubes and the tissue lining the pelvis.
On rare occasions, endometrial tissue may spread beyond the pelvic region.
Roughly 10% of childbearing-age women will experience endometriosis, according to the World Health Organization, and 35% to 50% of women with pelvic pain and or infertility suffer from the disorder. Globally, endometriosis affects about 190 million women, according to the WHO.
There?s no cure for endometriosis, although surgical removal of the lesions can improve fertility. The downside, however, is that the lesions come back about half the time, and more than one-quarter of endometriosis surgery patients need three or more operations because it?s hard to find all of the diseased tissue that needs to be removed.
?Endometriosis is a non-malignant condition, but the lesions sometimes perforate organs, resulting in a life-threatening situation,? said Olena Taratula of the College of Pharmacy, who also collaborated on the study. ?Therapies for pain result in infertility, and patients wishing to improve fertility often seek surgical removal of the lesions. And unfortunately, not only is the recurrence rate high, complications associated with surgery add to the overall risk.?
Magnetic hyperthermia had not previously been considered as a potential means of ablating endometriosis lesions because other magnetic nanoparticles have relatively low heating efficiency, she said. The nanoparticles could only get hot enough after being directly injected into diseased tissue, which is not a realistic approach for endometriosis.
The collaboration that also included the College of Pharmacy?s Youngrong Park, Abraham Moses, Peter Do and Ananiya Demessie overcame that problem by developing hexagonal-shaped nanoparticles that have more than six times the heating efficiency of conventional spherical nanoparticles when subjected to an alternating magnetic field.
Modifying the nanoparticles with a peptide ? multiple amino acids linked in a chain ? that targets a cellular receptor abundant in endometriosis cells enhanced their ability to accumulate in endometriosis lesions, the scientists said. Studies of mice with endometriotic tissue transplanted from macaques demonstrated the nanoparticles? ability to eradicate the diseased cells following one session of magnetic hyperthermia.
?Furthermore, in collaboration with Khashayar Farsad from OHSU?s Dotter Interventional Institute, we showed the efficiency of the same nanoparticles as an MRI contrast agent,? Oleh Taratula said. ?This feature of the nanoparticles can aid in the diagnosis of endometriotic lesions by MRI before their exposure to the external alternating magnetic field.?
Also part of the project group were Addie Luo of the Oregon National Primate Research Center; Cory Wyatt of the OHSU Department of Diagnostic Radiology; Leonardo Campos and Younes Jahangiri of the Dotter Interventional Institute; Hassan Albarqi of Najran University in Saudi Arabia; and Parinaz Ghanbari, who helped prepare the graphical abstract illustrating the research.
Oleh and Olena Taratula each has an adjunct appointment with OHSU.
The National Institutes of Health, the Eunice Kennedy Shriver National Institute of Child Health and Human Development, the National Primate Research Center and the OSU College of Pharmacy supported this study.
We would love to say thanks to the writer of this short article for this outstanding content
Nanoparticles show promise for finding, removing endometriosis lesions
Journal Reference:
- Emily S. Lau, Dongyu Wang, Mary Roberts, Christy N. Taylor, Gayathree Murugappan, Aladdin H. Shadyab, Peter F. Schnatz, Leslie V. Farland, Malissa J. Wood, Nandita S. Scott, Charles B. Eaton, Jennifer E. Ho. Infertility and Risk of Heart Failure in the Women?s Health Initiative. Journal of the American College of Cardiology, 2022; 79 (16): 1594 DOI: 10.1016/j.jacc.2022.02.020
?We are beginning to recognize that a woman?s reproductive history tells a lot about her future risk of heart disease,? says first author Emily Lau, MD, MPH, cardiologist and director of the Menopause, Hormones & Cardiovascular Clinic at MGH. ?Whether a woman has difficulty becoming pregnant, what happens during her pregnancies, when she transitions through menopause all influence her risk of heart disease later in life.?
Infertility affects about 1 in 5 US women and includes a spectrum of conception difficulties, but its link with heart failure has not been well-studied until recently. Partnering with the Women?s Health Initiative (WHI), which was designed in the early 1990s and queried a woman?s reproductive history, Lau and colleagues studied postmenopausal women from the WHI and examined whether infertility was associated with development of heart failure.
There are two types of heart failure: heart failure with preserved ejection fraction (HFpEF) and heart failure with reduced ejection fraction (HFrEF). Ejection fraction is a measurement related to the volume percentage of blood that is pumped from the left ventricle of the heart during each beat. An ejection fraction less than 50% is commonly viewed as abnormal or reduced.
The team found an association between infertility and overall heart failure, specifically with HFpEF, a form of heart failure that is far more common in women regardless of fertility history. Among the 38,528 postmenopausal women studied, 14% of the participants reported a history of infertility. Over a 15-year follow up period, the researchers noted that infertility was associated with 16% future risk of overall heart failure. When they examined heart failure subtypes, they found that infertility was associated with a 27% increased future risk of HFpEF.
Over the past decade, HFpEF (where the heart muscle does not relax well) as opposed to HFrEF (where the left ventricle does not pump well), has become the dominant form of heart failure in both men and women. But it remains more common in women. ?It?s a challenging condition because we still do not completely understand how HFpEF develops and we do not have very good therapies to treat HFpEF,? says Lau.
?I think our findings are particularly noteworthy because heart failure with preserved ejection fraction is more prevalent in women,? says Lau. ?We don?t understand why we see HFpEF more in women. Looking back in a woman?s early reproductive life may give us some clues as to why.? Of note, the team observed that the link persisted regardless of whether an individual eventually conceived or had a live birth.
The increased risk was independent of traditional cardiovascular risk factors and other infertility-related conditions. ?There has been some suggestion in previous studies that women with infertility do have more cardiometabolic risk factors,? says Lau, but the team did not find that cardiometabolic risk factors explained the link between infertility with heart failure in this study. They also looked to see if other infertility-related conditions like thyroid disease, irregular menses, and early menopause explained the association between infertility and heart failure but did not evidence to support that hypothesis either.
?So it really begs the question: what are the mechanisms driving the association between infertility and heart failure,? says Lau. Is it shared risk factors, or is infertility on the causal pathway? She mentions vascular and endothelial dysfunction may be involved and plans on eventually clarifying the mechanism underlying the link between infertility and heart failure. In the future, Lau hopes to conduct a prospective study of women with an infertility history involving exercise parameters, vascular measures, and more, to solve the mystery.
?We as scientists and doctors are beginning to recognize how important a woman?s reproductive history is for their future risk of heart disease. Infertility is one of many cardiovascular risk factors, such as hypertension and high blood pressure, but reproductive history is not routinely considered as part of the cardiovascular risk assessment,? says Lau. Since people do not tend to develop heart failure until well in their 60s and beyond, and infertility is mostly experienced in the 20s, 30s, and 40s, many physicians are not thinking about the connection. ?We cannot change a woman?s history of infertility, but if we know a woman has had a history of infertility, we can be more aggressive about counseling her about other modifiable risk factors including high blood pressure, high cholesterol, smoking, and beyond.?
This research was supported in part by the National Institutes of Health and American Heart Association.
We want to thank the author of this short article for this remarkable content
Study finds infertility history linked with increased risk of heart failure
Journal Reference:
- Emily S. Lau, Dongyu Wang, Mary Roberts, Christy N. Taylor, Gayathree Murugappan, Aladdin H. Shadyab, Peter F. Schnatz, Leslie V. Farland, Malissa J. Wood, Nandita S. Scott, Charles B. Eaton, Jennifer E. Ho. Infertility and Risk of Heart Failure in the Women?s Health Initiative. Journal of the American College of Cardiology, 2022; 79 (16): 1594 DOI: 10.1016/j.jacc.2022.02.020
?We are beginning to recognize that a woman?s reproductive history tells a lot about her future risk of heart disease,? says first author Emily Lau, MD, MPH, cardiologist and director of the Menopause, Hormones & Cardiovascular Clinic at MGH. ?Whether a woman has difficulty becoming pregnant, what happens during her pregnancies, when she transitions through menopause all influence her risk of heart disease later in life.?
Infertility affects about 1 in 5 US women and includes a spectrum of conception difficulties, but its link with heart failure has not been well-studied until recently. Partnering with the Women?s Health Initiative (WHI), which was designed in the early 1990s and queried a woman?s reproductive history, Lau and colleagues studied postmenopausal women from the WHI and examined whether infertility was associated with development of heart failure.
There are two types of heart failure: heart failure with preserved ejection fraction (HFpEF) and heart failure with reduced ejection fraction (HFrEF). Ejection fraction is a measurement related to the volume percentage of blood that is pumped from the left ventricle of the heart during each beat. An ejection fraction less than 50% is commonly viewed as abnormal or reduced.
The team found an association between infertility and overall heart failure, specifically with HFpEF, a form of heart failure that is far more common in women regardless of fertility history. Among the 38,528 postmenopausal women studied, 14% of the participants reported a history of infertility. Over a 15-year follow up period, the researchers noted that infertility was associated with 16% future risk of overall heart failure. When they examined heart failure subtypes, they found that infertility was associated with a 27% increased future risk of HFpEF.
Over the past decade, HFpEF (where the heart muscle does not relax well) as opposed to HFrEF (where the left ventricle does not pump well), has become the dominant form of heart failure in both men and women. But it remains more common in women. ?It?s a challenging condition because we still do not completely understand how HFpEF develops and we do not have very good therapies to treat HFpEF,? says Lau.
?I think our findings are particularly noteworthy because heart failure with preserved ejection fraction is more prevalent in women,? says Lau. ?We don?t understand why we see HFpEF more in women. Looking back in a woman?s early reproductive life may give us some clues as to why.? Of note, the team observed that the link persisted regardless of whether an individual eventually conceived or had a live birth.
The increased risk was independent of traditional cardiovascular risk factors and other infertility-related conditions. ?There has been some suggestion in previous studies that women with infertility do have more cardiometabolic risk factors,? says Lau, but the team did not find that cardiometabolic risk factors explained the link between infertility with heart failure in this study. They also looked to see if other infertility-related conditions like thyroid disease, irregular menses, and early menopause explained the association between infertility and heart failure but did not evidence to support that hypothesis either.
?So it really begs the question: what are the mechanisms driving the association between infertility and heart failure,? says Lau. Is it shared risk factors, or is infertility on the causal pathway? She mentions vascular and endothelial dysfunction may be involved and plans on eventually clarifying the mechanism underlying the link between infertility and heart failure. In the future, Lau hopes to conduct a prospective study of women with an infertility history involving exercise parameters, vascular measures, and more, to solve the mystery.
?We as scientists and doctors are beginning to recognize how important a woman?s reproductive history is for their future risk of heart disease. Infertility is one of many cardiovascular risk factors, such as hypertension and high blood pressure, but reproductive history is not routinely considered as part of the cardiovascular risk assessment,? says Lau. Since people do not tend to develop heart failure until well in their 60s and beyond, and infertility is mostly experienced in the 20s, 30s, and 40s, many physicians are not thinking about the connection. ?We cannot change a woman?s history of infertility, but if we know a woman has had a history of infertility, we can be more aggressive about counseling her about other modifiable risk factors including high blood pressure, high cholesterol, smoking, and beyond.?
This research was supported in part by the National Institutes of Health and American Heart Association.
We want to thank the author of this short article for this remarkable content
Study finds infertility history linked with increased risk of heart failure
Jason Momoa, la aclamada estrella de cine que interpreta a Arthur Curry en la película de Aquaman está alineado con otra gran producción de Warner Bros., pero a diferencia del superhéroe, este rol parece algo inesperado para los talentos de Momoa. El actor hawaiano está en negociaciones finales para protagonizar la película live action de Minecraft que producirá el estudio, confirmó The Hollywood Reporter.
Desde su origen en 2011, Minecraft ha revolucionado el mundo de los videojuegos a través de este divertido y pixelado universo que le permite a los jugadores usar bloques para crear estructuras y mundos. El juego se convirtió en toda una sensación, llegando a más de 100 millones de usuarios solo unos años después de su lanzamiento, lo que llevó a que Microsoft adquiere Mojang por $ 2.5 mil millones en 2014.
Warner Bros., por su parte, ha estado desarrollando un proyecto basado en el juego durante años. Dado al éxito del juego, era de esperar que los estudios vieran dinero detrás de una posible película, y se han rumoreado varias estrella para ponerse detrás del proyecto, entre ellas, el director de The Adam Project, Shawn Levy, junto con la estrella de It’s Always Sunny In Philadelphia, Rob McElhenney.
De todos modos, la película parece haber quedado en manos del cineasta de Napoleon Dynamite, Jared Hess, quien escribirá y dirigirá el proyecto que protagonizará el actor de Aquaman. Posteriormente, Hess dirigió también otras comedias luego del hit de culto, como Nacho Libre con Jack Black y Masterminds en 2016, con Zach Galifanakis, Jason Sudeikis, Owen Wilson, Kristen Wiig y Kate McKinnon. Igualmente, ninguno de estos filmes fueron recibidos con el mismo entusiasmo que Napoleon Dynamite.
De todas formas, encontramos cierta esperanza en el proyecto, ya que últimamente, las películas basadas en videojuegos han estado marcando una buena racha. El año pasado, Shawn Levy y Ryan Reynolds sorprendieron a la taquilla con la sensacional Free Guy, y este año hemos visto el éxito de la adaptación de Uncharted con Tom Holland y Mark Wahlberg, así como la revitalización de Paramount desde la saga de Sonic, cuya secuela está arrasando actualmente en la taquilla mundial con la ayuda de Jim Carrey e Idris Elba.
La productora de Dune (película en la que también trabajó Momoa) también se encuentra detrás de esta nueva producción, junto a Mary Parent y Roy Lee, y Jill Messick, quien recibirá un crédito de producción póstumo por desarrollar la película antes de su muerte en 2018. Los productores ejecutivos incluyen a Jon Berg, Cale Boyter y Jon Spaihts. El popular videojuego proviene de Mojang Studios de Suecia, con Lydia Winters y Vu Bui de Mojang también produciendo la película.
Momoa y Warner tienen también como próximo estreno a Aquaman and the Lost Kingdom, secuela del filme de 2018, que se estrenará en marzo de 2023. La película original de James Wan (quien regresa para la segunda parte), recaudó más de mil millones de dólares y ha probado el atractivo de Momoa en la pantalla grande.
Déjanos tu mensaje con tu opinión o comentario sobre alguna serie, película o programa. ¿Qué te gustaría leer sobre celebridades, películas, series o plataformas? ¡No dejes de escribirnos a contacto@quever.news!
We would like to give thanks to the writer of this short article for this awesome web content
Jason Momoa protagonizará esta película basada en un popular videojuego
Jason Momoa, la aclamada estrella de cine que interpreta a Arthur Curry en la película de Aquaman está alineado con otra gran producción de Warner Bros., pero a diferencia del superhéroe, este rol parece algo inesperado para los talentos de Momoa. El actor hawaiano está en negociaciones finales para protagonizar la película live action de Minecraft que producirá el estudio, confirmó The Hollywood Reporter.
Desde su origen en 2011, Minecraft ha revolucionado el mundo de los videojuegos a través de este divertido y pixelado universo que le permite a los jugadores usar bloques para crear estructuras y mundos. El juego se convirtió en toda una sensación, llegando a más de 100 millones de usuarios solo unos años después de su lanzamiento, lo que llevó a que Microsoft adquiere Mojang por $ 2.5 mil millones en 2014.
Warner Bros., por su parte, ha estado desarrollando un proyecto basado en el juego durante años. Dado al éxito del juego, era de esperar que los estudios vieran dinero detrás de una posible película, y se han rumoreado varias estrella para ponerse detrás del proyecto, entre ellas, el director de The Adam Project, Shawn Levy, junto con la estrella de It’s Always Sunny In Philadelphia, Rob McElhenney.
De todos modos, la película parece haber quedado en manos del cineasta de Napoleon Dynamite, Jared Hess, quien escribirá y dirigirá el proyecto que protagonizará el actor de Aquaman. Posteriormente, Hess dirigió también otras comedias luego del hit de culto, como Nacho Libre con Jack Black y Masterminds en 2016, con Zach Galifanakis, Jason Sudeikis, Owen Wilson, Kristen Wiig y Kate McKinnon. Igualmente, ninguno de estos filmes fueron recibidos con el mismo entusiasmo que Napoleon Dynamite.
De todas formas, encontramos cierta esperanza en el proyecto, ya que últimamente, las películas basadas en videojuegos han estado marcando una buena racha. El año pasado, Shawn Levy y Ryan Reynolds sorprendieron a la taquilla con la sensacional Free Guy, y este año hemos visto el éxito de la adaptación de Uncharted con Tom Holland y Mark Wahlberg, así como la revitalización de Paramount desde la saga de Sonic, cuya secuela está arrasando actualmente en la taquilla mundial con la ayuda de Jim Carrey e Idris Elba.
La productora de Dune (película en la que también trabajó Momoa) también se encuentra detrás de esta nueva producción, junto a Mary Parent y Roy Lee, y Jill Messick, quien recibirá un crédito de producción póstumo por desarrollar la película antes de su muerte en 2018. Los productores ejecutivos incluyen a Jon Berg, Cale Boyter y Jon Spaihts. El popular videojuego proviene de Mojang Studios de Suecia, con Lydia Winters y Vu Bui de Mojang también produciendo la película.
Momoa y Warner tienen también como próximo estreno a Aquaman and the Lost Kingdom, secuela del filme de 2018, que se estrenará en marzo de 2023. La película original de James Wan (quien regresa para la segunda parte), recaudó más de mil millones de dólares y ha probado el atractivo de Momoa en la pantalla grande.
Déjanos tu mensaje con tu opinión o comentario sobre alguna serie, película o programa. ¿Qué te gustaría leer sobre celebridades, películas, series o plataformas? ¡No dejes de escribirnos a contacto@quever.news!
We would like to give thanks to the writer of this short article for this awesome web content
Jason Momoa protagonizará esta película basada en un popular videojuego
Journal Reference:
- Fan Wang, Kaiqi Yang, Mingyuan Ge, Jiajun Wang, Jun Wang, Xianghui Xiao, Wah-Keat Lee, Linsen Li, Ming Tang. Reaction Heterogeneity in LiFePO4 Agglomerates and the Role of Intercalation-Induced Stress. ACS Energy Letters, 2022; 1648 DOI: 10.1021/acsenergylett.2c00226
This is not good for the battery?s health. Rice University researchers who recognize the problem worked with the Department of Energy to view in great detail how the various particles in an electrode interact with lithium during use.
Specifically, the Rice lab of materials scientist Ming Tang analyzed nano- and micro-scale interactions within lithium iron phosphate cathodes through modeling and imaging offered by the transmission X-ray microscopy capabilities at Brookhaven National Laboratory and Argonne National Laboratory.
Their paper in the American Chemical Society journal ACS Energy Letters supports theories Tang and his colleagues formed several years ago that foresaw how lithium travels in the dynamic environment inside a typical commercial cathode.
Being able to watch sealed cathodes charge and discharge at Brookhaven offered absolute proof.
?Batteries have a lot of particle aggregates that soak up and give up lithium, and we wanted to know what happens on their surfaces, how uniform the reaction is,? said Tang, an associate professor of materials science and nanoengineering. ?In general, we always want a more uniform reaction so we can charge the battery faster.?
In images taken at Brookhaven?s powerful X-ray synchrotron, the researchers saw some regions inside the cathode were better at absorption than others. The ability to look at single or aggregated particles in 3D showed that rather than reacting over their entire surfaces, lithium favored particular regions over others.
?This is very different from conventional wisdom,? Tang said. ?The most interesting observation is that these reaction regions are shaped like one-dimensional filaments lying across the surface of these aggregated particles. It was kind of weird, but it matched what we saw in our models.?
Tang said the lithium filaments looked something like thick nanotubes and were several hundred nanometers wide and several microns long.
He said stress between misaligned crystallites in the particle agglomerates prevents lithium from being uniformly inserted into or extracted from the aggregate surface because that will generate too large an energy penalty. Instead, lithium is forced to flow into or out of the aggregates at ?hot spots? that develop the filament shape.
What does this mean for battery performance?
?This is a bad thing,? Tang said. ?Because the lithium can?t go into the cathode uniformly, it slows down the intercalation mechanics.
?What our study offers is some potential ways to help make lithium insertion or extraction more uniform on these aggregates or individual particles,? he said. ?Introducing some porosity in the particle agglomerates might sacrifice some energy density, but at the same time would allow lithium to go in more uniformly. That could allow you to get more energy at a given charge/discharge rate.
?Another thought is if we can somehow align the orientation of these small particles so their maximum expansion is perpendicular to each other, they?ll better accommodate lithium intercalation,? he said.
That would be a challenge for battery manufacturers, he admitted.
?We don?t have enough experience in synthesis to know how to make that happen,? Tang said. ?What we?re providing is bait. Let?s see if somebody bites.?
Rice graduate alumni Fan Wang and Kaiqi Yang are co-lead authors of the paper. Co-authors are Mingyuan Ge, Jiajun Wang, Jun Wang, Xianghi Xiao and Wah-Keat Lee, all of Brookhaven National Laboratory, Upton, New York; and Linsen Li of Shanghai Jiao Tong University.
The Department of Energy, Basic Energy Sciences (DE-SC0019111) and the National Science Foundation (CMMI-1929949) supported the research.
We wish to say thanks to the writer of this write-up for this amazing web content
Lithium?s narrow paths limit batteries
Journal Reference:
- Fan Wang, Kaiqi Yang, Mingyuan Ge, Jiajun Wang, Jun Wang, Xianghui Xiao, Wah-Keat Lee, Linsen Li, Ming Tang. Reaction Heterogeneity in LiFePO4 Agglomerates and the Role of Intercalation-Induced Stress. ACS Energy Letters, 2022; 1648 DOI: 10.1021/acsenergylett.2c00226
This is not good for the battery?s health. Rice University researchers who recognize the problem worked with the Department of Energy to view in great detail how the various particles in an electrode interact with lithium during use.
Specifically, the Rice lab of materials scientist Ming Tang analyzed nano- and micro-scale interactions within lithium iron phosphate cathodes through modeling and imaging offered by the transmission X-ray microscopy capabilities at Brookhaven National Laboratory and Argonne National Laboratory.
Their paper in the American Chemical Society journal ACS Energy Letters supports theories Tang and his colleagues formed several years ago that foresaw how lithium travels in the dynamic environment inside a typical commercial cathode.
Being able to watch sealed cathodes charge and discharge at Brookhaven offered absolute proof.
?Batteries have a lot of particle aggregates that soak up and give up lithium, and we wanted to know what happens on their surfaces, how uniform the reaction is,? said Tang, an associate professor of materials science and nanoengineering. ?In general, we always want a more uniform reaction so we can charge the battery faster.?
In images taken at Brookhaven?s powerful X-ray synchrotron, the researchers saw some regions inside the cathode were better at absorption than others. The ability to look at single or aggregated particles in 3D showed that rather than reacting over their entire surfaces, lithium favored particular regions over others.
?This is very different from conventional wisdom,? Tang said. ?The most interesting observation is that these reaction regions are shaped like one-dimensional filaments lying across the surface of these aggregated particles. It was kind of weird, but it matched what we saw in our models.?
Tang said the lithium filaments looked something like thick nanotubes and were several hundred nanometers wide and several microns long.
He said stress between misaligned crystallites in the particle agglomerates prevents lithium from being uniformly inserted into or extracted from the aggregate surface because that will generate too large an energy penalty. Instead, lithium is forced to flow into or out of the aggregates at ?hot spots? that develop the filament shape.
What does this mean for battery performance?
?This is a bad thing,? Tang said. ?Because the lithium can?t go into the cathode uniformly, it slows down the intercalation mechanics.
?What our study offers is some potential ways to help make lithium insertion or extraction more uniform on these aggregates or individual particles,? he said. ?Introducing some porosity in the particle agglomerates might sacrifice some energy density, but at the same time would allow lithium to go in more uniformly. That could allow you to get more energy at a given charge/discharge rate.
?Another thought is if we can somehow align the orientation of these small particles so their maximum expansion is perpendicular to each other, they?ll better accommodate lithium intercalation,? he said.
That would be a challenge for battery manufacturers, he admitted.
?We don?t have enough experience in synthesis to know how to make that happen,? Tang said. ?What we?re providing is bait. Let?s see if somebody bites.?
Rice graduate alumni Fan Wang and Kaiqi Yang are co-lead authors of the paper. Co-authors are Mingyuan Ge, Jiajun Wang, Jun Wang, Xianghi Xiao and Wah-Keat Lee, all of Brookhaven National Laboratory, Upton, New York; and Linsen Li of Shanghai Jiao Tong University.
The Department of Energy, Basic Energy Sciences (DE-SC0019111) and the National Science Foundation (CMMI-1929949) supported the research.
We wish to say thanks to the writer of this write-up for this amazing web content
Lithium?s narrow paths limit batteries
Journal Reference:
- Amanda Irwin, Arne Geschke, Thomas M. Brooks, Juha Siikamaki, Louise Mair, Bernardo B. N. Strassburg. Quantifying and categorising national extinction-risk footprints. Scientific Reports, 2022; 12 (1) DOI: 10.1038/s41598-022-09827-0
Around 1 million species already face extinction, many within decades, according to the recent Intergovernmental Science-Policy Platform on Biodiversity and Ecosystem Services (IPBES) assessment report.
Spanning more than 5,000 species in 188 countries, the research finds consumption in Europe, North America, and East Asia (such as Japan and South Korea) primarily drives species extinction risk in other countries. Affected species include the Nombre de Dios Streamside Frog in Honduras and the Malagasy Giant Jumping Rat in Madagascar.
Published in Nature: Scientific Reports, the research is led by Ms Amanda Irwin at the University of Sydney?s Integrated Sustainability Analysis research group and is co-authored by the International Union for Conservation of Nature (IUCN) chief scientist Dr Thomas Brooks and chief economist Dr Juha Siikamäki.
The authors liken the biodiversity crisis to the climate one, albeit with less publicity. ?These crises are occurring in parallel,? Ms Irwin said. ?The upcoming COP-15 will hopefully raise the profile of the other human-driven natural crisis of our generation ? irreparable biodiversity loss ? and our findings can provide valuable insights into the role that global consumption plays as one of the drivers of this loss.?
Key findings
- Consumption in 76 countries, concentrated in Europe, North America, and East Asia, primarily drives extinction risk in other countries.
- In 16 countries, concentrated in Africa, this extinction-risk footprint is driven by offshore consumption.
- In 96 countries ? around half of those studied ? domestic consumption is the greatest driver of the extinction-risk footprint.
- International trade drives 29.5 percent of the global extinction-risk footprint.
- Consumption of products and services from the food, beverage and agriculture sectors is the greatest driver of consumption-driven extinction risk, together constituting 39 percent of the global extinction-risk footprint, followed by consumption of goods and services from the construction sector (16 percent).
PhD candidate Ms Irwin said: ?The complexity of economic interactions in our globalised world means that the purchase of a coffee in Sydney may contribute to biodiversity loss in Honduras. The choices we make every day have an impact on the natural world, even if we don?t see this impact.?
?Everything that we consume has been derived from the natural world, with raw materials transformed into finished products through a myriad of supply chain transactions. These transactions often have a direct impact on species.?
Co-author, IUCN chief economist Dr Juha Siikamäki notes: ?This insight into how prevalently consumption patterns influence biodiversity loss across the globe is critical to inform ongoing international negotiations for nature, including the 15th Conference of the Parties to the Convention on Biological Diversity, which aims to finalise the post-2020 global biodiversity framework later this year.
?The finding from this study that about 30 percent of the global extinction-risk footprint is embedded in international trade underlines the need to consider the responsibilities of different countries and all actors, including financing of conservation, not only in the context of their national boundaries but extending to their impacts internationally.?
Co-author, Associate Professor Arne Geschke from the Integrated Sustainability Analysis research group at the University of Sydney said: ?The activities which threaten species in a given location are often induced by consumption patterns in far-away locations, meaning that local interventions may be insufficient.
?Appropriate interventions to address extinction risk in Madagascar, for example, where 66 percent of the extinction-risk footprint is exported, should be different from those implemented in Colombia, where 93 percent of the extinction-risk footprint is generated by domestic consumption.?
About the study
Using data available in IUCN?s Red List of Threatened Species, the authors introduced the non-normalised Species Threat Abatement and Restoration (nSTAR) metric as a measure of extinction risk.
They then applied the methodology widely-used to quantify carbon footprints ? of which the Integrated Sustainability Analysis research group is a world leader ? to link this extinction risk to global consumption patterns using the global supply chain database Eora.
An extinction-risk footprint was calculated by species, by economic sector, for 188 countries.
Co-author Associate Professor Arne Geschke previously co-wrote a Naturepaper that demonstrated international trade is a key driver of biodiversity threats.
This new paper is a collaboration between the University of Sydney, IUCN, Newcastle University (UK) and the International Institute for Sustainability in Brazil.
We wish to give thanks to the author of this article for this awesome web content
Your morning coffee could hasten species? extinction
Journal Reference:
- Amanda Irwin, Arne Geschke, Thomas M. Brooks, Juha Siikamaki, Louise Mair, Bernardo B. N. Strassburg. Quantifying and categorising national extinction-risk footprints. Scientific Reports, 2022; 12 (1) DOI: 10.1038/s41598-022-09827-0
Around 1 million species already face extinction, many within decades, according to the recent Intergovernmental Science-Policy Platform on Biodiversity and Ecosystem Services (IPBES) assessment report.
Spanning more than 5,000 species in 188 countries, the research finds consumption in Europe, North America, and East Asia (such as Japan and South Korea) primarily drives species extinction risk in other countries. Affected species include the Nombre de Dios Streamside Frog in Honduras and the Malagasy Giant Jumping Rat in Madagascar.
Published in Nature: Scientific Reports, the research is led by Ms Amanda Irwin at the University of Sydney?s Integrated Sustainability Analysis research group and is co-authored by the International Union for Conservation of Nature (IUCN) chief scientist Dr Thomas Brooks and chief economist Dr Juha Siikamäki.
The authors liken the biodiversity crisis to the climate one, albeit with less publicity. ?These crises are occurring in parallel,? Ms Irwin said. ?The upcoming COP-15 will hopefully raise the profile of the other human-driven natural crisis of our generation ? irreparable biodiversity loss ? and our findings can provide valuable insights into the role that global consumption plays as one of the drivers of this loss.?
Key findings
- Consumption in 76 countries, concentrated in Europe, North America, and East Asia, primarily drives extinction risk in other countries.
- In 16 countries, concentrated in Africa, this extinction-risk footprint is driven by offshore consumption.
- In 96 countries ? around half of those studied ? domestic consumption is the greatest driver of the extinction-risk footprint.
- International trade drives 29.5 percent of the global extinction-risk footprint.
- Consumption of products and services from the food, beverage and agriculture sectors is the greatest driver of consumption-driven extinction risk, together constituting 39 percent of the global extinction-risk footprint, followed by consumption of goods and services from the construction sector (16 percent).
PhD candidate Ms Irwin said: ?The complexity of economic interactions in our globalised world means that the purchase of a coffee in Sydney may contribute to biodiversity loss in Honduras. The choices we make every day have an impact on the natural world, even if we don?t see this impact.?
?Everything that we consume has been derived from the natural world, with raw materials transformed into finished products through a myriad of supply chain transactions. These transactions often have a direct impact on species.?
Co-author, IUCN chief economist Dr Juha Siikamäki notes: ?This insight into how prevalently consumption patterns influence biodiversity loss across the globe is critical to inform ongoing international negotiations for nature, including the 15th Conference of the Parties to the Convention on Biological Diversity, which aims to finalise the post-2020 global biodiversity framework later this year.
?The finding from this study that about 30 percent of the global extinction-risk footprint is embedded in international trade underlines the need to consider the responsibilities of different countries and all actors, including financing of conservation, not only in the context of their national boundaries but extending to their impacts internationally.?
Co-author, Associate Professor Arne Geschke from the Integrated Sustainability Analysis research group at the University of Sydney said: ?The activities which threaten species in a given location are often induced by consumption patterns in far-away locations, meaning that local interventions may be insufficient.
?Appropriate interventions to address extinction risk in Madagascar, for example, where 66 percent of the extinction-risk footprint is exported, should be different from those implemented in Colombia, where 93 percent of the extinction-risk footprint is generated by domestic consumption.?
About the study
Using data available in IUCN?s Red List of Threatened Species, the authors introduced the non-normalised Species Threat Abatement and Restoration (nSTAR) metric as a measure of extinction risk.
They then applied the methodology widely-used to quantify carbon footprints ? of which the Integrated Sustainability Analysis research group is a world leader ? to link this extinction risk to global consumption patterns using the global supply chain database Eora.
An extinction-risk footprint was calculated by species, by economic sector, for 188 countries.
Co-author Associate Professor Arne Geschke previously co-wrote a Naturepaper that demonstrated international trade is a key driver of biodiversity threats.
This new paper is a collaboration between the University of Sydney, IUCN, Newcastle University (UK) and the International Institute for Sustainability in Brazil.
We wish to give thanks to the author of this article for this awesome web content
Your morning coffee could hasten species? extinction
“Ogni tanto sento Rafa. Vincere il derby darebbe energia scudetto. A chi arriva raccomando di tenere Maldini. A Orlando sto bene e ho ancora un contratto, ma in Italia tornerei al volo”
Con lei fu diverso?
“Io ho avuto fortuna perché ho giocato in un Milan di campioni. Questo deve ancora risalire, ma ha un futuro perché i dirigenti stanno costruendo bene. È una squadra giovane e per chi ha poca esperienza è difficile entrare in una grande squadra”.
Questo Milan però, come dice lei stesso, è diverso da quello che ha trovato lei.
“Ma è sempre il Milan. In un club di alto livello ti chiedono risultati subito e se non li ottieni ti mettono in discussione. E isolarsi è difficile: si può dire quel che si vuole, ma al 99 per cento non si può ignorare quello che dicono e scrivono su di te. Io ho capito con il tempo quanto pesava stare al Milan. Un club che mi ha dato il massimo, ma gli infortuni hanno complicato tutto il mio percorso”.
Ancelotti aveva pronosticato per lei un Pallone d?oro in breve tempo…
“Quando sei giovanissimo e cominci bene ti riempiono di complimenti, ma riuscire a stare con i piedi per terra è essenziale”.
Cosa cambierei della mia esperienza al Milan? Porterei con me i miei genitori
Alexandre Pato
Lei che cosa cambierebbe del suo percorso?
“Chiederei ai miei genitori di rimanere con me a Milano. Ripeto, il Milan mi ha dato tutto quello che poteva, ho un grande amore per il club, però nel periodo difficile ero solo. Sono arrivato giovanissimo, i miei sono stati con me per un po? e poi sono tornati in Brasile. Fossero stati sempre con me avrei avuto più sostegno”.
Quali ricordi ha di quel derby del 2011, fondamentale per lo scudetto?
“Allora non capivo l?importanza, volevo solo andare a casa e stare tranquillo. Adesso sarebbe diverso. Il derby dà sensazioni inspiegabili e tanto orgoglio”.
Secondo lei che cosa rappresenta il derby di Milano?
“È il cuore della città, che ha la cultura, la moda, tutto. Eppure con il derby la città si ferma”.
Tornerebbe al Milan?
“A Orlando si sta bene e ho ancora un contratto, però Maldini lo sa: sarei pronto. Ora sono maturato, ho un atteggiamento diverso nei confronti del calcio e magari sarei utile nel rapporto con i più giovani”.
Il club sta cambiando proprietà: giornate complicate anche per un giocatore?
“Dipende dall?età e da quanto capisce della situazione, ma bisogna sempre farsi delle domande. Se chi compra il club ha la mentalità di investire, come faceva Berlusconi, andrà tutto bene. Vediamo come si comporteranno questi nuovi proprietari, quando arriveranno. Trovano un management che ha lavorato bene, Maldini è una garanzia. Mi auguro che ne tengano conto”.
Che cosa le manca di Milano?
“Mi mancano l?Italia e gli italiani, il calore dei tifosi. A mia moglie dico sempre, ‘un giorno ti porterò a Milano e capirai di che cosa parlo’. Per me è stata una città fondamentale: ho imparato tante cose e mi manca tutto di Milano. E mi piacerebbe tornare al Milan, in fondo in Italia ci sono tanti giocatori con una bella età”.
Ibrahimovic è fondamentale perché ha il fuoco dentro. Motiva i compagni
Alexandre Pato
A proposito di età, Ibrahimovic dovrebbe continuare?
“È fondamentale perché ha il fuoco dentro. Motiva i compagni e tutti hanno paura di lui, soltanto Onyewu in quel Milan lo aveva sfidato”. Risata. “Ma le risposte adesso deve dargliele il suo corpo”.
Chi vince il derby?
“Gara difficile. Il Milan non può scivolare, per lo scudetto manca poco e il Milan può vincerlo. Battere gli avversari in Coppa Italia darebbe altra energia”.
Chi segna?
“Giroud è forte, Leao deve trovare la giocata. Lasciamo aperto il pronostico, perché con l?Inter è sempre così”.
© RIPRODUZIONE RISERVATA
We want to give thanks to the author of this short article for this outstanding material
E Pato: “Quanto mi piace questo Milan dei giovani. Tifo Leao, ma segna Giroud”
“Ogni tanto sento Rafa. Vincere il derby darebbe energia scudetto. A chi arriva raccomando di tenere Maldini. A Orlando sto bene e ho ancora un contratto, ma in Italia tornerei al volo”
Ale sa come si fa. Alexandre Pato, ex predestinato del calcio, ha dovuto passare in realtà attraverso alti e bassi notevoli. Uno dei picchi è stato il derby del 3 aprile 2011, fondamentale per la conquista dello scudetto del Milan firmato Allegri, l?ultimo, per ora, della storia rossonera. In quella stagione Pato segnò 14 gol in campionato, come Ibrahimovic e Robinho. Oggi ha passato i trenta, gioca nella Mls ma sogna un ritorno e tifa per Rafael Leao. “Ci sentiamo ogni tanto. Ha talento e questo Milan sa avere pazienza con i giovani. Maldini è una garanzia e sa quello che serve ai giocatori”.
Con lei fu diverso?
“Io ho avuto fortuna perché ho giocato in un Milan di campioni. Questo deve ancora risalire, ma ha un futuro perché i dirigenti stanno costruendo bene. È una squadra giovane e per chi ha poca esperienza è difficile entrare in una grande squadra”.
Questo Milan però, come dice lei stesso, è diverso da quello che ha trovato lei.
“Ma è sempre il Milan. In un club di alto livello ti chiedono risultati subito e se non li ottieni ti mettono in discussione. E isolarsi è difficile: si può dire quel che si vuole, ma al 99 per cento non si può ignorare quello che dicono e scrivono su di te. Io ho capito con il tempo quanto pesava stare al Milan. Un club che mi ha dato il massimo, ma gli infortuni hanno complicato tutto il mio percorso”.
Ancelotti aveva pronosticato per lei un Pallone d?oro in breve tempo…
“Quando sei giovanissimo e cominci bene ti riempiono di complimenti, ma riuscire a stare con i piedi per terra è essenziale”.
Cosa cambierei della mia esperienza al Milan? Porterei con me i miei genitori
Alexandre Pato
Lei che cosa cambierebbe del suo percorso?
“Chiederei ai miei genitori di rimanere con me a Milano. Ripeto, il Milan mi ha dato tutto quello che poteva, ho un grande amore per il club, però nel periodo difficile ero solo. Sono arrivato giovanissimo, i miei sono stati con me per un po? e poi sono tornati in Brasile. Fossero stati sempre con me avrei avuto più sostegno”.
Quali ricordi ha di quel derby del 2011, fondamentale per lo scudetto?
“Allora non capivo l?importanza, volevo solo andare a casa e stare tranquillo. Adesso sarebbe diverso. Il derby dà sensazioni inspiegabili e tanto orgoglio”.
Secondo lei che cosa rappresenta il derby di Milano?
“È il cuore della città, che ha la cultura, la moda, tutto. Eppure con il derby la città si ferma”.
Tornerebbe al Milan?
“A Orlando si sta bene e ho ancora un contratto, però Maldini lo sa: sarei pronto. Ora sono maturato, ho un atteggiamento diverso nei confronti del calcio e magari sarei utile nel rapporto con i più giovani”.
Il club sta cambiando proprietà: giornate complicate anche per un giocatore?
“Dipende dall?età e da quanto capisce della situazione, ma bisogna sempre farsi delle domande. Se chi compra il club ha la mentalità di investire, come faceva Berlusconi, andrà tutto bene. Vediamo come si comporteranno questi nuovi proprietari, quando arriveranno. Trovano un management che ha lavorato bene, Maldini è una garanzia. Mi auguro che ne tengano conto”.
Che cosa le manca di Milano?
“Mi mancano l?Italia e gli italiani, il calore dei tifosi. A mia moglie dico sempre, ‘un giorno ti porterò a Milano e capirai di che cosa parlo’. Per me è stata una città fondamentale: ho imparato tante cose e mi manca tutto di Milano. E mi piacerebbe tornare al Milan, in fondo in Italia ci sono tanti giocatori con una bella età”.
Ibrahimovic è fondamentale perché ha il fuoco dentro. Motiva i compagni
Alexandre Pato
A proposito di età, Ibrahimovic dovrebbe continuare?
“È fondamentale perché ha il fuoco dentro. Motiva i compagni e tutti hanno paura di lui, soltanto Onyewu in quel Milan lo aveva sfidato”. Risata. “Ma le risposte adesso deve dargliele il suo corpo”.
Chi vince il derby?
“Gara difficile. Il Milan non può scivolare, per lo scudetto manca poco e il Milan può vincerlo. Battere gli avversari in Coppa Italia darebbe altra energia”.
Chi segna?
“Giroud è forte, Leao deve trovare la giocata. Lasciamo aperto il pronostico, perché con l?Inter è sempre così”.
© RIPRODUZIONE RISERVATA
We want to give thanks to the author of this short article for this outstanding material
E Pato: “Quanto mi piace questo Milan dei giovani. Tifo Leao, ma segna Giroud”
Journal Reference:
- Da Pan, Hiroyuki Miura, Tatsuo Kanno, Michiko Shigefuji, Tetsuo Abiru. Deep-Neural-Network-Based Estimation of Site Amplification Factor from Microtremor H/V Spectral Ratio. Bulletin of the Seismological Society of America, 2022; DOI: 10.1785/0120210300
A new study by researchers from Hiroshima University published on April 5 in the Bulletin of the Seismological Society of America introduced a novel artificial intelligence (AI)-based technique for estimating site amplification factors from data on ambient vibrations or microtremors of the ground.
Subsurface soil conditions, which determine how earthquakes affect a site, vary substantially. Softer soils, for example, tend to amplify ground motion from an earthquake, while hard substrates may dampen it. Ambient vibrations of the ground or microtremors that occur all over the Earth?s surface caused by human or atmospheric disturbances can be used to investigate soil conditions. Measuring microtremors provides valuable information about the amplification factor (AF) of a site, thus its vulnerability to damage from earthquakes due to its response to tremors.
The recent study from Hiroshima University researchers introduced a new way to estimate site effects from microtremor data. ?The proposed method would contribute to more accurate and more detailed seismic ground motion predictions for future earthquakes,? says lead author and associate professor Hiroyuki Miura in the Graduate School of Advanced Science and Engineering. The study investigated the relationship between microtremor data and site amplification factors using a deep neural network with the goal of developing a model that could be applied at any site worldwide.
The researchers looked into a common method known as Horizontal-to-vertical spectral ratios (MHVR) which is usually used to estimate the resonant frequency of the seismic ground. It can be generated from microtremor data; ambient seismic vibrations are analyzed in three dimensions to figure out the resonant frequency of sediment layers on top of bedrock as they vibrate. Previous research has shown, however, that MHVR cannot reliably be used directly as the site amplification factor. So, this study proposed a deep neural network model for estimating site amplification factors from the MHVR data.
The study used 2012-2020 microtremor data from 105 sites in the Chugoku district of western Japan. The sites are part of Japan?s national seismograph network that contains about 1700 observation stations distributed in a uniform grid at 20 km intervals across Japan. Using a generalized spectral inversion technique, which separates out the parameters of source, propagation, and site, the researchers analyzed site-specific amplifications.
Data from each site were divided into a training set, a validation set, and a test set. The training set were used to teach a deep neural network. The validation set were used in the network?s iterative optimization of a model to describe the relationship between the microtremor MHVRs and the site amplification factors. The test data were a completely unknown set used to evaluate the performance of the model.
The model performed well on the test data, demonstrating its potential as a predictive tool for characterizing site amplification factors from microtremor data. However, notes Miura, ?the number of training samples analyzed in this study (80) sites is still limited,? and should be expanded before assuming that the neural network model applies nationwide or globally. The researchers hope to further optimize the model with a larger dataset.
Rapid and cost-effective techniques are needed for more accurate seismic ground motion prediction since the relationship is not always linear. Explains Miura, ?By applying the proposed method, site amplification factors can be automatically and accurately estimated from microtremor data observed at arbitrary site.? Going forward, the study authors aim to continue to refine advanced AI techniques to evaluate the nonlinear responses of the ground to earthquakes.
This research was funded by the National Research Institute for Earth Science and Disaster Prevention (NIED), Japan, and Neural Network Console provided by SONY (2021).
We want to thank the author of this article for this remarkable web content
Neural network model helps predict site-specific impacts of earthquakes
Journal Reference:
- Da Pan, Hiroyuki Miura, Tatsuo Kanno, Michiko Shigefuji, Tetsuo Abiru. Deep-Neural-Network-Based Estimation of Site Amplification Factor from Microtremor H/V Spectral Ratio. Bulletin of the Seismological Society of America, 2022; DOI: 10.1785/0120210300
A new study by researchers from Hiroshima University published on April 5 in the Bulletin of the Seismological Society of America introduced a novel artificial intelligence (AI)-based technique for estimating site amplification factors from data on ambient vibrations or microtremors of the ground.
Subsurface soil conditions, which determine how earthquakes affect a site, vary substantially. Softer soils, for example, tend to amplify ground motion from an earthquake, while hard substrates may dampen it. Ambient vibrations of the ground or microtremors that occur all over the Earth?s surface caused by human or atmospheric disturbances can be used to investigate soil conditions. Measuring microtremors provides valuable information about the amplification factor (AF) of a site, thus its vulnerability to damage from earthquakes due to its response to tremors.
The recent study from Hiroshima University researchers introduced a new way to estimate site effects from microtremor data. ?The proposed method would contribute to more accurate and more detailed seismic ground motion predictions for future earthquakes,? says lead author and associate professor Hiroyuki Miura in the Graduate School of Advanced Science and Engineering. The study investigated the relationship between microtremor data and site amplification factors using a deep neural network with the goal of developing a model that could be applied at any site worldwide.
The researchers looked into a common method known as Horizontal-to-vertical spectral ratios (MHVR) which is usually used to estimate the resonant frequency of the seismic ground. It can be generated from microtremor data; ambient seismic vibrations are analyzed in three dimensions to figure out the resonant frequency of sediment layers on top of bedrock as they vibrate. Previous research has shown, however, that MHVR cannot reliably be used directly as the site amplification factor. So, this study proposed a deep neural network model for estimating site amplification factors from the MHVR data.
The study used 2012-2020 microtremor data from 105 sites in the Chugoku district of western Japan. The sites are part of Japan?s national seismograph network that contains about 1700 observation stations distributed in a uniform grid at 20 km intervals across Japan. Using a generalized spectral inversion technique, which separates out the parameters of source, propagation, and site, the researchers analyzed site-specific amplifications.
Data from each site were divided into a training set, a validation set, and a test set. The training set were used to teach a deep neural network. The validation set were used in the network?s iterative optimization of a model to describe the relationship between the microtremor MHVRs and the site amplification factors. The test data were a completely unknown set used to evaluate the performance of the model.
The model performed well on the test data, demonstrating its potential as a predictive tool for characterizing site amplification factors from microtremor data. However, notes Miura, ?the number of training samples analyzed in this study (80) sites is still limited,? and should be expanded before assuming that the neural network model applies nationwide or globally. The researchers hope to further optimize the model with a larger dataset.
Rapid and cost-effective techniques are needed for more accurate seismic ground motion prediction since the relationship is not always linear. Explains Miura, ?By applying the proposed method, site amplification factors can be automatically and accurately estimated from microtremor data observed at arbitrary site.? Going forward, the study authors aim to continue to refine advanced AI techniques to evaluate the nonlinear responses of the ground to earthquakes.
This research was funded by the National Research Institute for Earth Science and Disaster Prevention (NIED), Japan, and Neural Network Console provided by SONY (2021).
We want to thank the author of this article for this remarkable web content
Neural network model helps predict site-specific impacts of earthquakes
Tot aan 2030 komen er nog zo?n 2,2 miljoen van dit type consumenten ?bestedingsklaar? bij (Gen-Z). Het koop- en consumptiegedrag van deze beide jongere generaties (Gen-Z en Millennials) is substantieel anders dan van de oudere generaties. Bron: CBS Statline en FSIN FoodShopper Monitor 2022
Geen tijd en geen zin
49% van Generatie-Z en 42% van de Millennials gaven aan dat het minstens 1 keer per week voorkwam dat ze geen tijd hadden om te koken. Niet alleen hadden ze er geen tijd voor, ze hadden er ook geen zin in (59% van Gen-Z en 61% van de Millennials). Uiteraard zetten veel mensen zich dan over zo?n mentale drempel heen en doen het alsnog. Maar ook dát aantal is kleiner geworden. Dan eten ze iets wat ze niet hoeven klaar te maken of? en dat is het eerste alternatief geworden in Coronatijd? ze laten een maaltijd bezorgen.
Dit zijn conclusies die we als FoodService Instituut Nederland hebben getrokken uit twee metingen. De eerste meting was in 2018, dus voor Corona. En de tweede was in 2020, in het hartje van de tweede lockdown. Ook voor Corona hadden mensen soms geen tijd en zin, maar de percentages zijn tijdens Corona fors gestegen. En dat is opvallend, want objectief gezien hadden we meer tijd omdat we thuis moesten blijven. Het zegt dus iets over wat we met z?n allen meer of minder belangrijk zijn gaan vinden.
Om even iets te nuanceren: het grootste deel van de Nederlanders kookte wel gewoon tijdens de crisis. Maar het blijft een feit dat het aantal mensen dat aangeeft minstens één keer per week geen tijd of zin te hebben om te koken fors is gegroeid.
Ik hoor vaak over jongeren zeggen dat hun gedrag wel verandert als ze ouder worden en kinderen krijgen. Maar dat is slechts ten dele het geval
Daarom al die nieuwe diensten
Met deze ontwikkelingen in ons achterhoofd is het ook niet zo vreemd dat de bezorgdiensten in Nederland fors groeien. Dat geldt voor boodschappen, maar dat geldt ook voor lunches en warme maaltijden. En alle nieuwe varianten, zoals flitsbezorgers en de nieuwe diensten van Thuisbezorgd in samenwerking met AH, zijn voorbeelden van een ?foodwerkelijkheid? die snel aan het veranderen is. Bovendien gaan de grote supermarktformules vaker inzetten op een ?multi-format-strategie?. Ze komen met gemakswinkels, zijn actief op mobiele knooppunten (stations, kantorenparken), in kantoren zelf, op straat met fietsbezorgers, ze runnen kookwebsites enzovoort. Dat doen ze allemaal omdat ze zien dat hun klanten aan het veranderen zijn. Vooral die jongere klanten.
Jongeren houden hun aangeleerd gedrag vast
Ik hoor vaak over jongeren zeggen dat hun gedrag wel verandert als ze ouder worden en kinderen krijgen. Maar dat is slechts ten dele het geval. Want het belangrijkste is dat eenmaal verworven gewoontes, die gezien worden als prettig en ontlastend, toch blijven hangen. Ook als stellen kinderen krijgen blijft de neiging om gemak te zoeken grotendeels overeind, blijkt uit ons onderzoek.
Maar dan die crisisdreiging?
Eén ontwikkeling gaat wel roet in dat eten gooien en dat is de forse prijsstijging van food en alle kosten van levensonderhoud. Consumenten worden nu al opeens voorzichtig om geld uit te geven en dat zie je meteen terug in de groei van het marktaandeel van Aldi en Lidl. We hebben dat al eerder gezien. In de periode 2008 – 2013 hadden we de effecten van een bankencrisis met alle economische effecten. In 2009 veranderde het koopgedrag van de consument fors. Goedkope concepten wonnen terrein en speciaalzaken en luxe horeca hebben flink omzet ingeleverd. Nu staat de grondstoffencrisis voor onze deur. Als de economische crisis, die nu begint, langer gaat duren dan krijgen we vergelijkbare ontwikkelingen.
Wanneer verandert gedrag fundamenteel?
Vooralsnog lijkt het erop dat de constatering in de kop van deze column nog even actueel blijft. Veel jongeren kunnen nog steeds niet koken en hebben er ook geen lol in. En de vraag is of een crisis daar zoveel verandering in brengt. De grondhouding om zo min mogelijk tijd te besteden aan het klaarmaken van maaltijden blijft, zeker bij die twee jongere generaties. Hun impact op de foodsector wordt alleen maar groter. Waarschijnlijk gaan de oplossingen die ze zoeken wel veranderen ten opzichte van die in 2019. Misschien meer maaltijden en gemaksartikelen van Aldi en Lidl en plaats van het laten thuisbezorgen vanuit een restaurant. Pas als de crisis écht hevig wordt en langer duurt, dan gaan we met z?n allen terug naar de basis van de Maslov-piramide. Dan gaan we weer meer eigen groente verbouwen, volkstuintjes omarmen, diepvrieskisten vullen, kelderkasten volstapelen met conserven enzovoort. Ik hoop dat Poetin het niet zover laat komen. En terwijl ik dit schrijf vraag ik me af of ik daar nu wel of niet een smiley bij moet plaatsen?
We would like to give thanks to the writer of this write-up for this awesome material
‘Jongeren willen en kunnen niet koken’ – Keuze voor gemak is een blijvertje – Foodlog
Tot aan 2030 komen er nog zo?n 2,2 miljoen van dit type consumenten ?bestedingsklaar? bij (Gen-Z). Het koop- en consumptiegedrag van deze beide jongere generaties (Gen-Z en Millennials) is substantieel anders dan van de oudere generaties. Bron: CBS Statline en FSIN FoodShopper Monitor 2022
Geen tijd en geen zin
49% van Generatie-Z en 42% van de Millennials gaven aan dat het minstens 1 keer per week voorkwam dat ze geen tijd hadden om te koken. Niet alleen hadden ze er geen tijd voor, ze hadden er ook geen zin in (59% van Gen-Z en 61% van de Millennials). Uiteraard zetten veel mensen zich dan over zo?n mentale drempel heen en doen het alsnog. Maar ook dát aantal is kleiner geworden. Dan eten ze iets wat ze niet hoeven klaar te maken of? en dat is het eerste alternatief geworden in Coronatijd? ze laten een maaltijd bezorgen.
Dit zijn conclusies die we als FoodService Instituut Nederland hebben getrokken uit twee metingen. De eerste meting was in 2018, dus voor Corona. En de tweede was in 2020, in het hartje van de tweede lockdown. Ook voor Corona hadden mensen soms geen tijd en zin, maar de percentages zijn tijdens Corona fors gestegen. En dat is opvallend, want objectief gezien hadden we meer tijd omdat we thuis moesten blijven. Het zegt dus iets over wat we met z?n allen meer of minder belangrijk zijn gaan vinden.
Om even iets te nuanceren: het grootste deel van de Nederlanders kookte wel gewoon tijdens de crisis. Maar het blijft een feit dat het aantal mensen dat aangeeft minstens één keer per week geen tijd of zin te hebben om te koken fors is gegroeid.
Ik hoor vaak over jongeren zeggen dat hun gedrag wel verandert als ze ouder worden en kinderen krijgen. Maar dat is slechts ten dele het geval
Daarom al die nieuwe diensten
Met deze ontwikkelingen in ons achterhoofd is het ook niet zo vreemd dat de bezorgdiensten in Nederland fors groeien. Dat geldt voor boodschappen, maar dat geldt ook voor lunches en warme maaltijden. En alle nieuwe varianten, zoals flitsbezorgers en de nieuwe diensten van Thuisbezorgd in samenwerking met AH, zijn voorbeelden van een ?foodwerkelijkheid? die snel aan het veranderen is. Bovendien gaan de grote supermarktformules vaker inzetten op een ?multi-format-strategie?. Ze komen met gemakswinkels, zijn actief op mobiele knooppunten (stations, kantorenparken), in kantoren zelf, op straat met fietsbezorgers, ze runnen kookwebsites enzovoort. Dat doen ze allemaal omdat ze zien dat hun klanten aan het veranderen zijn. Vooral die jongere klanten.
Jongeren houden hun aangeleerd gedrag vast
Ik hoor vaak over jongeren zeggen dat hun gedrag wel verandert als ze ouder worden en kinderen krijgen. Maar dat is slechts ten dele het geval. Want het belangrijkste is dat eenmaal verworven gewoontes, die gezien worden als prettig en ontlastend, toch blijven hangen. Ook als stellen kinderen krijgen blijft de neiging om gemak te zoeken grotendeels overeind, blijkt uit ons onderzoek.
Maar dan die crisisdreiging?
Eén ontwikkeling gaat wel roet in dat eten gooien en dat is de forse prijsstijging van food en alle kosten van levensonderhoud. Consumenten worden nu al opeens voorzichtig om geld uit te geven en dat zie je meteen terug in de groei van het marktaandeel van Aldi en Lidl. We hebben dat al eerder gezien. In de periode 2008 – 2013 hadden we de effecten van een bankencrisis met alle economische effecten. In 2009 veranderde het koopgedrag van de consument fors. Goedkope concepten wonnen terrein en speciaalzaken en luxe horeca hebben flink omzet ingeleverd. Nu staat de grondstoffencrisis voor onze deur. Als de economische crisis, die nu begint, langer gaat duren dan krijgen we vergelijkbare ontwikkelingen.
Wanneer verandert gedrag fundamenteel?
Vooralsnog lijkt het erop dat de constatering in de kop van deze column nog even actueel blijft. Veel jongeren kunnen nog steeds niet koken en hebben er ook geen lol in. En de vraag is of een crisis daar zoveel verandering in brengt. De grondhouding om zo min mogelijk tijd te besteden aan het klaarmaken van maaltijden blijft, zeker bij die twee jongere generaties. Hun impact op de foodsector wordt alleen maar groter. Waarschijnlijk gaan de oplossingen die ze zoeken wel veranderen ten opzichte van die in 2019. Misschien meer maaltijden en gemaksartikelen van Aldi en Lidl en plaats van het laten thuisbezorgen vanuit een restaurant. Pas als de crisis écht hevig wordt en langer duurt, dan gaan we met z?n allen terug naar de basis van de Maslov-piramide. Dan gaan we weer meer eigen groente verbouwen, volkstuintjes omarmen, diepvrieskisten vullen, kelderkasten volstapelen met conserven enzovoort. Ik hoop dat Poetin het niet zover laat komen. En terwijl ik dit schrijf vraag ik me af of ik daar nu wel of niet een smiley bij moet plaatsen?
We would like to give thanks to the writer of this write-up for this awesome material
‘Jongeren willen en kunnen niet koken’ – Keuze voor gemak is een blijvertje – Foodlog
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Us Weekly tiene asociaciones de afiliados, por lo que podemos recibir una compensación por algunos enlaces a productos y servicios.
Otro día, otra mirada asesina de Jennifer López. La recién comprometida actriz Marry Me simplemente no puede equivocarse cuando se trata de moda. Ya sea que actúe en el escenario, sea dueña de una alfombra roja o simplemente pase el día con su hija, sabemos que siempre tendremos mucha inspiración de estilo con la que trabajar.
Tal fue el caso una vez más cuando López salió a Culver City, California con su hija Emme, de 14 años. Llevaba un vestido largo y colorido de Zimmermann Juliette cubierto con un estampado de palmeras/tropicales. Rápidamente nos enamoramos, pero dos problemas importantes se interpusieron en nuestro camino a la hora de recrear el look. Primero, el precio de $1,350 del vestido, y segundo, que parece estar agotado en todas partes. ¡Y entonces recurrimos a Amazon!
Amazon ¡Véalo!
¡Obtén el vestido floral maxi con botones de VOGVOG por solo $ 26 en Amazon! Tenga en cuenta que los precios son exactos a la fecha de publicación, 18 de abril de 2022, pero están sujetos a cambios.
Nos alegró mucho encontrar un estilo de vestido similar en Amazon con un precio mucho más económico. Al igual que el de J. Lo, este vestido tiene un estampado de hojas y flores tropicales con colores similares, e incluso tiene botones como el de ella. Nos encanta cómo ciñe la cintura también sin causar molestias. Está fruncido para que se estire e incluso cuenta con un lindo acento de lazo.
Este maxi vestido tiene mangas cortas y está hecho de un material ligero de rayón. La parte de la falda es fluida y también presenta una abertura en una pierna, que llega a la mayoría de las personas alrededor de la parte superior de la rodilla. Tiene excelentes calificaciones de los revisores, ¡y aún más genial es que en realidad viene en más de 30 variaciones de color/estampado! Si bien elegimos este, es posible que termines amando a otro aún más, ¡así que definitivamente échale un vistazo en la página de Amazon!
Amazon ¡Véalo!
¡Obtén el vestido floral maxi con botones de VOGVOG por solo $ 26 en Amazon! Tenga en cuenta que los precios son exactos a la fecha de publicación, 18 de abril de 2022, pero están sujetos a cambios.
López usó su vestido con zapatos nude, un bolso amarillo y anteojos de sol redondos de gran tamaño. Podría optar por el mismo estilo de zapatos/accesorios con esta versión de Amazon, o podría cambiarlo.
Prueba tacones dorados o plateados, o incluso sandalias planas con detalles de tiras. También puedes ir más informal, optando por un par de zapatillas de lona con plataforma y una bandolera. ¿Qué estás pensando para tu primer outfit?
¡Míralo!
¡Obtén el vestido floral maxi con botones de VOGVOG por solo $ 26 en Amazon! Tenga en cuenta que los precios son exactos a la fecha de publicación, 18 de abril de 2022, pero están sujetos a cambios.
Lee el artículo
¿No es tu estilo? ¡Compra más de VOGVOG aquí y descubre más vestidos en Amazon aquí! ¡No olvide consultar todas las ofertas diarias de Amazon para obtener más descubrimientos geniales!
¿Buscas otras formas de elevar tu armario? Echa un vistazo a más selecciones a continuación:
Los 20 mejores joggers y pantalones de chándal para mujeres de 2022 Los mejores leggings estilo lululemon para yoga, correr y más Los 13 mejores trajes de baño para mujeres Esta publicación es presentada por el equipo Shop With Us de Us Weekly. El equipo de Shop With Us tiene como objetivo destacar los productos y servicios que nuestros lectores pueden encontrar interesantes y útiles, como máscaras faciales, autobronceadores, calzas estilo Lululemon y todos los mejores regalos para todos en su vida. Sin embargo, la selección de productos y servicios no pretende de ninguna manera constituir un respaldo por parte de Us Weekly o de cualquier celebridad mencionada en la publicación. El equipo de Shop With Us puede recibir productos sin cargo de los fabricantes para probarlos. Además, Us Weekly recibe una compensación del fabricante de los productos sobre los que escribimos cuando hace clic en un enlace y luego compra el producto que aparece en un artículo. Esto no influye en nuestra decisión sobre si un producto o servicio se presenta o recomienda. Shop With Us opera independientemente del equipo de ventas de publicidad. Agradecemos sus comentarios en [email protected] ¡Feliz compra!
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We want to say thanks to the writer of this post for this incredible material
Canalice el look de $ 1,350 de Jennifer Lopez por solo $ 26 con este vestido playero – Inicio
Ads
Us Weekly tiene asociaciones de afiliados, por lo que podemos recibir una compensación por algunos enlaces a productos y servicios.
Otro día, otra mirada asesina de Jennifer López. La recién comprometida actriz Marry Me simplemente no puede equivocarse cuando se trata de moda. Ya sea que actúe en el escenario, sea dueña de una alfombra roja o simplemente pase el día con su hija, sabemos que siempre tendremos mucha inspiración de estilo con la que trabajar.
Tal fue el caso una vez más cuando López salió a Culver City, California con su hija Emme, de 14 años. Llevaba un vestido largo y colorido de Zimmermann Juliette cubierto con un estampado de palmeras/tropicales. Rápidamente nos enamoramos, pero dos problemas importantes se interpusieron en nuestro camino a la hora de recrear el look. Primero, el precio de $1,350 del vestido, y segundo, que parece estar agotado en todas partes. ¡Y entonces recurrimos a Amazon!
Amazon ¡Véalo!
¡Obtén el vestido floral maxi con botones de VOGVOG por solo $ 26 en Amazon! Tenga en cuenta que los precios son exactos a la fecha de publicación, 18 de abril de 2022, pero están sujetos a cambios.
Nos alegró mucho encontrar un estilo de vestido similar en Amazon con un precio mucho más económico. Al igual que el de J. Lo, este vestido tiene un estampado de hojas y flores tropicales con colores similares, e incluso tiene botones como el de ella. Nos encanta cómo ciñe la cintura también sin causar molestias. Está fruncido para que se estire e incluso cuenta con un lindo acento de lazo.
Este maxi vestido tiene mangas cortas y está hecho de un material ligero de rayón. La parte de la falda es fluida y también presenta una abertura en una pierna, que llega a la mayoría de las personas alrededor de la parte superior de la rodilla. Tiene excelentes calificaciones de los revisores, ¡y aún más genial es que en realidad viene en más de 30 variaciones de color/estampado! Si bien elegimos este, es posible que termines amando a otro aún más, ¡así que definitivamente échale un vistazo en la página de Amazon!
Amazon ¡Véalo!
¡Obtén el vestido floral maxi con botones de VOGVOG por solo $ 26 en Amazon! Tenga en cuenta que los precios son exactos a la fecha de publicación, 18 de abril de 2022, pero están sujetos a cambios.
López usó su vestido con zapatos nude, un bolso amarillo y anteojos de sol redondos de gran tamaño. Podría optar por el mismo estilo de zapatos/accesorios con esta versión de Amazon, o podría cambiarlo.
Prueba tacones dorados o plateados, o incluso sandalias planas con detalles de tiras. También puedes ir más informal, optando por un par de zapatillas de lona con plataforma y una bandolera. ¿Qué estás pensando para tu primer outfit?
¡Míralo!
¡Obtén el vestido floral maxi con botones de VOGVOG por solo $ 26 en Amazon! Tenga en cuenta que los precios son exactos a la fecha de publicación, 18 de abril de 2022, pero están sujetos a cambios.
Lee el artículo
¿No es tu estilo? ¡Compra más de VOGVOG aquí y descubre más vestidos en Amazon aquí! ¡No olvide consultar todas las ofertas diarias de Amazon para obtener más descubrimientos geniales!
¿Buscas otras formas de elevar tu armario? Echa un vistazo a más selecciones a continuación:
Los 20 mejores joggers y pantalones de chándal para mujeres de 2022 Los mejores leggings estilo lululemon para yoga, correr y más Los 13 mejores trajes de baño para mujeres Esta publicación es presentada por el equipo Shop With Us de Us Weekly. El equipo de Shop With Us tiene como objetivo destacar los productos y servicios que nuestros lectores pueden encontrar interesantes y útiles, como máscaras faciales, autobronceadores, calzas estilo Lululemon y todos los mejores regalos para todos en su vida. Sin embargo, la selección de productos y servicios no pretende de ninguna manera constituir un respaldo por parte de Us Weekly o de cualquier celebridad mencionada en la publicación. El equipo de Shop With Us puede recibir productos sin cargo de los fabricantes para probarlos. Además, Us Weekly recibe una compensación del fabricante de los productos sobre los que escribimos cuando hace clic en un enlace y luego compra el producto que aparece en un artículo. Esto no influye en nuestra decisión sobre si un producto o servicio se presenta o recomienda. Shop With Us opera independientemente del equipo de ventas de publicidad. Agradecemos sus comentarios en [email protected] ¡Feliz compra!
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We want to say thanks to the writer of this post for this incredible material
Canalice el look de $ 1,350 de Jennifer Lopez por solo $ 26 con este vestido playero – Inicio
Journal Reference:
- Sai Prasad Nayak, Lakshman K. Ventrapragada, Sai Sathish Ramamurthy, J.K. Kiran Kumar, Apparao M. Rao. Green synthesis of a novel porous gold-curcumin nanocomposite for super-efficient alcohol oxidation. Nano Energy, 2022; 94: 106966 DOI: 10.1016/j.nanoen.2022.106966
Researchers at the Clemson Nanomaterials Institute (CNI) and their collaborators from the Sri Sathya Sai Institute of Higher Learning (SSSIHL) in India discovered a novel way to combine curcumin ? the substance in turmeric ? and gold nanoparticles to create an electrode that requires 100 times less energy to efficiently convert ethanol into electricity.
While the research team must do more testing, the discovery brings replacing hydrogen as a fuel cell feedstock one step closer.
?Of all the catalysts for alcohol oxidation in alkaline medium, the one we prepared is the best so far,? said Apparao Rao, CNI?s founding director and the R. A. Bowen Professor of Physics in the College of Science?s.
Fuel cells generate electricity through a chemical reaction instead of combustion. They are used to power vehicles, buildings, portable electronic devices and backup power systems.
Hydrogen fuel cells are highly efficient and do not produce greenhouse gases. While hydrogen is the most common chemical element in the universe, it must be derived from substances such as natural gas and fossil fuels because it occurs naturally on Earth only in compound form with other elements in liquids, gases or solids. The necessary extraction adds to hydrogen fuel cells? cost and environmental impact.
In addition, hydrogen used in fuel cells is a compressed gas, creating challenges for storage and transportation. Ethanol, an alcohol made from corn or other agricultural-based feeds, is safer and easier to transport than hydrogen because it is a liquid.
?To make it a commercial product where we can fill our tanks with ethanol, the electrodes have to be highly efficient,? said Lakshman Ventrapragada, a former student of Rao?s who worked as a research assistant at the CNI and is an alumnus of SSSIHL. ?At the same time, we don?t want very expensive electrodes or synthetic polymeric substrates that are not eco-friendly because that defeats the whole purpose. We wanted to look at something green for the fuel cell generation process and making the fuel cell itself.?
The researchers focused on the fuel cell?s anode, where the ethanol or other feed source is oxidized.
Fuel cells widely use platinum as a catalyst. But platinum suffers from poisoning because of reaction intermediates such as carbon monoxide, Ventrapragada said. It is also costly.
The researchers used gold as a catalyst. Instead of using conducting polymers, metal-organic frameworks, or other complex materials to deposit the gold on the surface of the electrode, the researchers used curcumin because of its structural uniqueness. Curcumin is used to decorate the gold nanoparticles to stabilize them, forming a porous network around the nanoparticles. Researchers deposited the curcumin gold nanoparticle on the surface of the electrode at a 100 times lower electric current than in previous studies.
Without the curcumin coating, the gold nanoparticles agglomerate, cutting down on the surface area exposed to the chemical reaction, Ventrapragada said.
?Without this curcumin coating, the performance is poor,? Rao said. ?We need this coating to stabilize and create a porous environment around the nanoparticles, and then they do a super job with alcohol oxidation.
?There?s a big push in the industry for alcohol oxidation. This discovery is an excellent enabler for that. The next step is to scale the process up and work with an industrial collaborator who can actually make the fuel cells and build stacks of fuel cells for the real application,? he continued.
But the research could have broader implications than improved fuel cells. The electrode?s unique properties could lend itself to future applications in sensors, supercapacitors and more, Ventrapragada said.
In collaboration with the SSSIHL research team, Rao?s team is testing the electrode as a sensor that could help identify changes in the level of dopamine. Dopamine has been implicated in disorders such as Parkinson?s disease and attention deficit hyperactivity disorder. When members of the research team tested urine samples obtained from healthy volunteers, they could measure dopamine to the approved clinical range with this electrode using a cost-effective method compared to standard ones used today, Rao said.
?In the beginning stages of the project, we did not imagine other applications that gold-coated curcumin could support. However, before the end of the alcohol oxidation experiments, we were fairly confident that other applications are possible,? Ventrapragada said. ?Although we don?t have a complete understanding of what?s happening at the atomic level, we know for sure that curcumin is stabilizing the gold nanoparticles in a way that it can lend itself to other applications.?
We wish to say thanks to the writer of this article for this incredible material
Extract from a common kitchen spice could be key to greener, more efficient fuel cells
Journal Reference:
- Sai Prasad Nayak, Lakshman K. Ventrapragada, Sai Sathish Ramamurthy, J.K. Kiran Kumar, Apparao M. Rao. Green synthesis of a novel porous gold-curcumin nanocomposite for super-efficient alcohol oxidation. Nano Energy, 2022; 94: 106966 DOI: 10.1016/j.nanoen.2022.106966
Researchers at the Clemson Nanomaterials Institute (CNI) and their collaborators from the Sri Sathya Sai Institute of Higher Learning (SSSIHL) in India discovered a novel way to combine curcumin ? the substance in turmeric ? and gold nanoparticles to create an electrode that requires 100 times less energy to efficiently convert ethanol into electricity.
While the research team must do more testing, the discovery brings replacing hydrogen as a fuel cell feedstock one step closer.
?Of all the catalysts for alcohol oxidation in alkaline medium, the one we prepared is the best so far,? said Apparao Rao, CNI?s founding director and the R. A. Bowen Professor of Physics in the College of Science?s.
Fuel cells generate electricity through a chemical reaction instead of combustion. They are used to power vehicles, buildings, portable electronic devices and backup power systems.
Hydrogen fuel cells are highly efficient and do not produce greenhouse gases. While hydrogen is the most common chemical element in the universe, it must be derived from substances such as natural gas and fossil fuels because it occurs naturally on Earth only in compound form with other elements in liquids, gases or solids. The necessary extraction adds to hydrogen fuel cells? cost and environmental impact.
In addition, hydrogen used in fuel cells is a compressed gas, creating challenges for storage and transportation. Ethanol, an alcohol made from corn or other agricultural-based feeds, is safer and easier to transport than hydrogen because it is a liquid.
?To make it a commercial product where we can fill our tanks with ethanol, the electrodes have to be highly efficient,? said Lakshman Ventrapragada, a former student of Rao?s who worked as a research assistant at the CNI and is an alumnus of SSSIHL. ?At the same time, we don?t want very expensive electrodes or synthetic polymeric substrates that are not eco-friendly because that defeats the whole purpose. We wanted to look at something green for the fuel cell generation process and making the fuel cell itself.?
The researchers focused on the fuel cell?s anode, where the ethanol or other feed source is oxidized.
Fuel cells widely use platinum as a catalyst. But platinum suffers from poisoning because of reaction intermediates such as carbon monoxide, Ventrapragada said. It is also costly.
The researchers used gold as a catalyst. Instead of using conducting polymers, metal-organic frameworks, or other complex materials to deposit the gold on the surface of the electrode, the researchers used curcumin because of its structural uniqueness. Curcumin is used to decorate the gold nanoparticles to stabilize them, forming a porous network around the nanoparticles. Researchers deposited the curcumin gold nanoparticle on the surface of the electrode at a 100 times lower electric current than in previous studies.
Without the curcumin coating, the gold nanoparticles agglomerate, cutting down on the surface area exposed to the chemical reaction, Ventrapragada said.
?Without this curcumin coating, the performance is poor,? Rao said. ?We need this coating to stabilize and create a porous environment around the nanoparticles, and then they do a super job with alcohol oxidation.
?There?s a big push in the industry for alcohol oxidation. This discovery is an excellent enabler for that. The next step is to scale the process up and work with an industrial collaborator who can actually make the fuel cells and build stacks of fuel cells for the real application,? he continued.
But the research could have broader implications than improved fuel cells. The electrode?s unique properties could lend itself to future applications in sensors, supercapacitors and more, Ventrapragada said.
In collaboration with the SSSIHL research team, Rao?s team is testing the electrode as a sensor that could help identify changes in the level of dopamine. Dopamine has been implicated in disorders such as Parkinson?s disease and attention deficit hyperactivity disorder. When members of the research team tested urine samples obtained from healthy volunteers, they could measure dopamine to the approved clinical range with this electrode using a cost-effective method compared to standard ones used today, Rao said.
?In the beginning stages of the project, we did not imagine other applications that gold-coated curcumin could support. However, before the end of the alcohol oxidation experiments, we were fairly confident that other applications are possible,? Ventrapragada said. ?Although we don?t have a complete understanding of what?s happening at the atomic level, we know for sure that curcumin is stabilizing the gold nanoparticles in a way that it can lend itself to other applications.?
We wish to say thanks to the writer of this article for this incredible material
Extract from a common kitchen spice could be key to greener, more efficient fuel cells