JUST LIKE THEY DO AT THE BORDER

COVID-infected mothers separated from their babies affects breastfeeding outcomes

MARY ANN LIEBERT, INC./GENETIC ENGINEERING NEWS

Research News

 

IMAGE: THE JOURNAL PUBLISHES ORIGINAL SCIENTIFIC PAPERS, REVIEWS, AND CASE STUDIES ON A BROAD SPECTRUM OF TOPICS IN LACTATION MEDICINE. IT PRESENTS EVIDENCE-BASED RESEARCH ADVANCES AND EXPLORES THE IMMEDIATE AND LONG-TERM... view more 

CREDIT: MARY ANN LIEBERT, INC., PUBLISHERS

New Rochelle, NY, February 10, 2021--It may be safe for COVID-infected mothers to maintain contact with their babies. Keeping them apart can cause maternal distress and have a negative effect on exclusive breastfeeding later in infancy, according to The COVID Mothers Study published in the peer-reviewed journal Breastfeeding Medicine. Click here to read the article now.

In this worldwide study, infants who did not directly breastfeed, experience skin-to-skin care, or who did not room-in within arms' reach of their mothers were less likely to be exclusively breastfed in the first 3 months of life. Nearly 60% of mothers who experienced separation reported feeling very distressed, and 78% reported at least moderate distress. Nearly 1/3 of separated mothers (29%) were unable to breastfeed once reunited with their infants, despite trying.

"Our research contributes to the emerging evidence that skin-to-skin care, rooming-in within arms' reach, and direct breastfeeding may be safe for mothers infected with SARS-CoV-2," said Melissa Bartick, MD, Mount Auburn Hospital, and coauthors.

Arthur I. Eidelman, MD, Editor-in-Chief of Breastfeeding Medicine, states: "This report strengthens the recommendation that breastfeeding should be continued to be encouraged and supported in this era of the COVID-19 pandemic and that direct breastfeeding is indicated for mothers infected with SARS-CoV-2."

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About the Journal

Breastfeeding Medicine, the official journal of the Academy of Breastfeeding Medicine, is an authoritative, peer-reviewed, multidisciplinary journal published 10 times per year in print and online. The Journal publishes original scientific papers, reviews, and case studies on a broad spectrum of topics in lactation medicine. It presents evidence-based research advances and explores the immediate and long-term outcomes of breastfeeding, including the epidemiologic, physiologic, and psychological benefits of breastfeeding. Tables of content and a sample issue may be viewed on the Breastfeeding Medicine website.

About the Academy of Breastfeeding Medicine

The Academy of Breastfeeding Medicine (ABM) is a worldwide organization of medical doctors dedicated to the promotion, protection, and support of breastfeeding. Our mission is to unite members of the various medical specialties with this common purpose. For more than 20 years, ABM has been bringing doctors together to provide evidence-based solutions to the challenges facing breastfeeding across the globe. A vast body of research has demonstrated significant nutritional, physiological, and psychological benefits for both mothers and children that last well beyond infancy. But while breastfeeding is the foundation of a lifetime of health and well-being, clinical practice lags behind scientific evidence. By building on our legacy of research into this field and sharing it with the broader medical community, we can overcome barriers, influence health policies, and change behaviors.

About the Publisher

Mary Ann Liebert, Inc., publishers is known for establishing authoritative peer-reviewed journals in many promising areas of science and biomedical research. A complete list of the firm's 90 journals, books, and newsmagazines is available on the Mary Ann Liebert, Inc., publishers website.

Infant and toddler food product names may not accurately reflect ingredient amounts

PENN STATE

Research News

 

UNIVERSITY PARK, Pa. -- The descriptions on the fronts of infant and toddler food packages may not accurately reflect the actual ingredient amounts, according to new research. The team found that vegetables in the U.S. Department of Agriculture's "dark green" category were very likely to appear in the product name, but their average order in the ingredient list was close to fourth. In contrast, juice and juice concentrates that came earlier on the ingredient list were less likely to appear in product names.

"Early experiences with food can mold children's preferences and contribute to building healthful, or unhealthful, eating habits that last a lifetime," said author Alyssa Bakke, staff sensory scientist, Penn State. "Our previous work found combining vegetables with fruits reduced the amount of vegetable flavor adults perceived, as the fruit flavors were more pronounced. Other research has also indicated that parents predominantly use front-of-package information to make purchasing decisions. This means that when children are given commercial foods, they may be receiving less exposure to vegetable flavors than their parents assume based on the way the products are labeled and marketed."

The team created a database of over 500 commercial infant and toddler foods containing vegetables and documented inclusion of each vegetable and fruit in the product name; the form of the vegetable or fruit -- such as whole, puree, juice or juice concentrate -- and the position of the vegetable or fruit in the ingredient list. The researchers classified the vegetables based on the Department of Agriculture's categories--Dark Green, Red/Orange, Legumes, Starchy and Other. They classified the fruits into two categories: Common Fruits, comprising pears, apples and grapes, and Other Fruits, including mangos, pineapples and cherries.

The team conducted statistical analyses to examine associations between: (1) vegetable and fruit category and inclusion in front-of-package product name; (2) vegetable and fruit form and inclusion in front-of-package product name; and (3) vegetable and fruit form and inclusion in front-of-package product name, by vegetable and fruit category.

"There was never an instance in which a vegetable or a fruit listed in the product name did not appear in the ingredient list," said John Hayes, professor of food science, Penn State. "However, we still observed a disconnect between product names and ingredient lists. The front-of-pack labels did not always accurately represent the amount of various ingredients in the product, which are listed in descending order. This means parents may not be buying what they are hoping to buy if they only look at the name."

Specifically, the team found that dark green vegetables were more likely than expected to appear in product names; yet, their average order in the ingredient list was close to fourth. Interestingly, the team found that common fruits were less likely than expected to be included in the product names when found as juice/juice concentrates, but more likely than expected to be included in product names when no form was listed.

"Fruit juice and fruit juice concentrates were found in almost all of the food products we examined, but were often excluded from product names, presumably to avoid drawing attention to the use of juice concentrates as sweeteners," said Mackenzie Ferrante, graduate student, Colorado State University, and lead author on the paper.

Ferrante added that in the ingredient lists, fruits tended to be positioned close to the beginning of the ingredient list on the back or side of the package, indicating that the products were composed more of fruits than the vegetables suggested by front-of-package labeling.

"Companies producing infant and toddler foods sometimes use nutrition-related statements that can confuse the consumer and are intended to sway consumers to purchase their product," said Susan Johnson, professor of pediatrics at the University of Colorado Anschutz Medical Campus. "Parents believe vegetables are important for their children's health and that presumably they are purchasing food they believe contain significant amounts of vegetables because of front-of-package labeling. The discrepancies between which foods are included in the product name, where these foods fall on the ingredient lists, and whether these products actually taste like vegetables are key concerns to communicate to parents."

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The team's findings published on Feb. 8 in the Journal of Nutrition Education and Behavior.

Other authors on the paper include Laura Bellows, associate professor of food science and human nutrition, Colorado State University, and Kameron Moding, assistant professor of human development and family studies, Purdue University.

Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of ne

Traffic reductions due to COVID-19 boost air quality in some states but not all

UNIVERSITY OF SOUTH FLORIDA (USF INNOVATION)

Research News

Dramatic decreases in traffic caused by COVID-19 shutdowns improved air quality in car-dependent states but didn't offset additional forms of pollution in other parts of the country.

Those findings by a University of South Florida researcher suggest that while decreasing the number of vehicles on the road is a good first step toward creating cleaner air, additional measures aimed at reducing other sources of air pollution, such as coal plants or industrial factories, must also be considered.

The study, led by Yasin Elshorbany, an assistant professor of atmospheric chemistry and climate change at USF's St. Petersburg campus, was published in the journal, "Remote Sensing."

For the study, Elshorbany analyzed the impact of the pandemic-related lockdown on air quality by using remote sensors that measured different elements within the air, including nitrogen dioxide, carbon monoxide, ozone and aerosol particles. The study focused on states with high traffic volume, such as New York, Illinois, Florida, Texas and California.

The clear skies and empty roads caused by the COVID-19 lockdowns created a valuable research opportunity. The study found that vehicle volumes across the U.S. dropped by 40-60 percent shortly after the pandemic was declared.

The results showed a significant improvement in air quality in regions where traffic is the main pollution source, such as in New York City and the state of Florida. However, it was not as effective in areas dominated by other sources of pollution, including industrial emissions or meteorological conditions. In fact, in areas such as Charleston, WV, and Chicago, air quality actually worsened during the pandemic due to an increase in other pollution sources.

"This shows that in certain states, in addition to traffic regulations we need to focus on other big pollution problems, such as industrial emissions in Illinois, wildfires in California or oil refineries in Texas," Elshorbany added.

Elshorbany was interested in how significant the changes in air quality would be during the lockdown because enhanced environmental regulations related to tailpipe pollution were already leading to cleaner air in the U.S.

"With the advancements in technology and the use of catalysts in cars over the past few decades, air quality has improved in the U.S.," he said. "This has resulted in traffic not serving as the main pollutant in most of the country."

The study was funded by a $25,000 grant from USF Research & Innovation, one of 14 studies supported by nearly $320,000 in seed grants for COVID-19 research partnerships.

In addition to the current study, Elshorbany is working with a multidisciplinary team from USF to examine key environmental impacts brought about by the lockdown. Their goal is to better understand the health and socioeconomic consequences of changes in air quality.

"This demonstrates USF's commitment to timely and important research," Elshorbany said. "It gives us the opportunity to publish information that is relevant to policymakers and useful to everyday people."

Mobile game that uses implicit learning improved children's short-term food choice

CARNEGIE MELLON UNIVERSITY

Research News

 

Rates of overweight and obesity in children are rising around the world, with serious long-term consequences for health and health care costs. In prior research, video and mobile games have helped children eat healthier and exercise more. A new study examined how Indian 10- and 11-year-olds' food choices were affected by playing a pediatric dietary mobile game that uses implicit learning--educating players without making them aware of the lessons through innovations in neurocognitive training and immersive technology. The study found that the game significantly improved children's food choices immediately after play.

The study was conducted by researchers at Carnegie Mellon University (CMU), Hofstra University, Johns Hopkins University Center for Communication Programs (CCP), FriendsLearn, The Mithra Trust, Mind in Motion, the Center for Communication and Change - India (CCC-I), and Seethapathy Clinic and Hospital. The randomized controlled trial was designed and conducted by researchers from CCC-I and CCP and the data modeling and analytics were led by CMU. The study appears in JMIR mHealth and uHealth.

"While many factors contribute to overweight and obesity, dietary decisions are a leading cause," explains Rema Padman, trustees professor of management science and healthcare informatics at CMU's Heinz College, who led the study. "Video games that are perceived by children as a fun activity rather than a learning tool present a great opportunity to change children's health behaviors by delivering relevant knowledge implicitly. We are studying such gamified interventions as 'digital vaccine' candidates that have the potential to influence lifestyle behavior changes and lead to better health outcomes." (Digital vaccines are a subcategory of digital therapeutics, which are evidence-based, prevention approaches that use digital technologies, such as gamified applications delivered via mobile devices, to encourage positive behavior.)

Most video games for children use explicit education strategies, such as providing answers, feedback, instructions, or suggestions to players. This study examined how an action video game called fooya!, which uses implicit learning to promote healthy eating and physical activity in children, affected actual food choices. In the game, an avatar fights robots that represent unhealthy foods, and the avatar's speed and body shape vary in response to the type of food it eats.

Evidence of the effects of games that use implicit education strategies on pediatric healthy eating is limited. Using data about the clicks made by players as they played fooya!, researchers analyzed the relationship between patterns of game play and behavioral outcomes related to dietary health.

The study involved 104 children ages 10 and 11 years from three schools in Chennai, India. The children were randomly assigned to a treatment group that played fooya! or a control group that played a board game that did not feature dietary education. Children played the games for 20 minutes each in two sessions. After playing, they were shown three pairs of healthy and unhealthy food items from three categories--drinks (water and a carbonated soft drink), savory snacks (cashews and potato chips), and sweet snacks (raisins and a chocolate bar)--and asked to choose two items to eat.

Children who played fooya! were more likely to choose healthy foods immediately after playing the game, the study found. Children's food choices were not influenced by how many levels of the game they played, as previous research on this topic has found, but by food facts children read while playing the game: Reading more facts about healthy foods was associated with healthier food choices, while reading more facts about unhealthy foods was associated with more unhealthy food choices, a finding the authors called counterintuitive. Nonetheless, children searched for more food facts about healthy food than about unhealthy food, which drove the overall positive effect of playing the game.

"This finding will also influence how we communicate to children about healthy food choices for behavior change," says Uttara Bharath Kumar, technical advisor for social and behavior change at CCP. "It is consistent with what we know from behavioral science that fear and negative communication do not work as well as positive messaging and promoting self-efficacy--the notion that 'you can do it!'"

"Nutrition and lifestyle are at the root of lifelong risk of noncommunicable and infectious diseases," explains Bhargav Sri Prakash, founder & CEO of FriendsLearn, the life science and health technology company that serves as the research translation and innovation partner of the Digital Vaccine Project at CMU. "These findings indicate the potential for societal impact by developing rigorous evidence-based science for 'digital vaccines' based on neurocognitive computing and analytics. As we build a platform of scalable, rich, game-like, engaging experiences, we aim to protect the health of children and families through science."

Among the limitations of the study, the authors note, are its small size, homogeneous groups of children, and short-term food choices, limiting the generalizability of the findings. Longitudinal studies on this subject can help determine longer-term effects, the authors suggest.

"By examining the complex interactions between game-playing patterns and health behaviors, our findings can inform the design and use of more effective mobile games for improving children's dietary health," notes Yi-Chin Kato-Lin, assistant professor of information systems and business analytics at Hofstra University, who collaborated on the study. "For example, video game designers may want to limit the display of unhealthy foods in their games."

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The research was funded in part by the Remala Foundation. The study was undertaken by the Center for Communication & Change - India, an organization affiliated with the Bloomberg School of Public Health Center for Communication Programs at Johns Hopkins Universit

Flooding in the Columbia River basin expected to increase under climate change

OREGON STATE UNIVERSITY

Research News

 

IMAGE: A 2019 FLOOD ALONG THE WILLAMETTE RIVER. view more 

CREDIT: DAVID BAKER, OREGON STATE UNIVERSITY

CORVALLIS, Ore. - The Columbia River basin will see an increase in flooding over the next 50 years as a result of climate change, new modeling from Oregon State University indicates.

The magnitude of flooding - the term used to describe flooding severity - is expected to increase throughout the basin, which includes the Columbia, Willamette and Snake rivers and hundreds of tributaries. In some areas, the flooding season will expand, as well.

"The flood you're used to seeing out your window once every 10 years will likely be larger than it has been in the past," said the study's lead author, Laura Queen, a research assistant at OSU's Oregon Climate Change Research Institute.

The findings are based on natural river conditions and do not take into account potential flood control measures, including dams, but the increases are significant nonetheless, said study co-author Philip Mote, a professor in the College of Earth, Ocean, and Atmospheric Sciences and dean of the Graduate School at OSU.

"We don't know how much of this increased flood risk can be managed through mitigation measures until we study the issue further," Mote said. "But managing a 30% to 40% increase, as is predicted for many areas, is clearly beyond our management capabilities."

The findings were published recently in the journal Hydrology and Earth System Science. Co-authors are David Rupp of the Oregon Climate Change Research Institute and Oriana Chegwidden and Bart Nijssen of the University of Washington.

The study emerged out of Queen's work on her honors thesis as an undergraduate in the University of Oregon's Robert D. Clark Honors College. Queen, a Corvallis native, continued the work at OCCRI and is now enrolled in a doctoral program at Victoria University of Wellington in New Zealand.

The goal of Queen's research was to better understand how flooding in the Columbia River basin might change as the planet warms. The Columbia River drains much of the Pacific Northwest, including portions of seven states and British Columbia. It has the fourth-largest streamflow volume in the United States.

The Pacific Northwest has a history of costly and disruptive flooding. The largest flood in modern history occurred in late spring 1948 when flooding from the Columbia River destroyed the city of Vanport, Oregon, displacing more than 18,500 people. Floods on the Chehalis River in 2007 and 2009 closed Interstate 5 in Washington and floods along the Willamette River in 1996 and 2019 caused hundreds of millions of dollars in damage.

Queen ran simulations using hydrology models and a previously collected set of streamflow data for 396 sites throughout the Columbia River basin and other watersheds in western Washington. The data included a 50-year window from the past, 1950-1999, as well as a 50-year window of expected streamflows in the future, 2050 to 2099, that was developed using several different climate models.

Previous studies predicting future streamflows showed mixed results, but the results of this new analysis were clear and surprising, Mote said.

"This was the best and most complete set of data," he said. "It shows that the magnitude of one-, 10- and 100-year floods is likely go up nearly everywhere in the region. These are profound shifts."

The Willamette River and its tributaries are expected to see the biggest increase in flooding magnitude, with 50% to 60% increases in 100-year floods. The streamflows are expected to be smaller downstream and grow larger upstream.

On the Snake River, streamflows will grow larger as they move downstream until they reach the confluence of the Salmon River tributary and then will drop abruptly. Parts of the Snake River will see a 40% increase in 10-year floods and a 60% increase in 100-year floods. But below the confluence with the Salmon River on the Oregon-Idaho border, the increase drops to 20% for 10-year floods and 30% for 100-year floods.

The model also suggests a significant increase in the flood season on the Snake River, which is largely concentrated in late spring now but could start as early as December or January in the future, Mote said.

One of the drivers of the change is warmer winters that will see precipitation fall more as rain instead of snow. Lower spring snowpack will lead to earlier spring streamflows in many rivers. The cold upper Columbia River basin in Canada is projected to experience little change in snowpack volume, but the snow will melt faster.

The study's findings could have implications for flood management policy in the coming decades, Mote said. A logical next step in the research is to run the models again and include existing dams to see the role they may play in mitigating flooding.

"This work provides information and impetus for the people who manage flood risk," he said. "We'll need to know how much of this can be mitigated by existing flood control."

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Plant-based magnetic nanoparticles with antifungal properties

Scientists developed a plant-based technology for obtaining magnetic nanoparticles with antifungal properties

IMMANUEL KANT BALTIC FEDERAL UNIVERSITY

Research News

 

IMAGE: PICTURE OF NANOPARTICLES view more 

CREDIT: THAKUR ET AL. / NANO-STRUCTURES & NANO-OBJECTS, 2020

A team of researchers from Immanuel Kant Baltic Federal University obtained magnetic nanoparticles using sweet flag (Acorus calamus). Both the roots and the leaves of this plant have antioxidant, antimicrobial, and insecticide properties. The extract of sweet flag was used as a non-toxic reagent for the manufacture of coated particles. The authors of the work also showed the efficiency of the new nanoparticles against several types of pathogenic fungi that damage cultivated plants. A technology developed by the team provides for the manufacture of nanoparticles from a cheap plant-based raw material and reduces the harmful effect of reagents on the environment.

Because of their unique properties, nanoparticles are used in many areas, from medicine to oil production. Their characteristics depend to a great extent on their size and shape, and the ratio between their surface area and volume plays a key role. The bigger it is, the stronger is a nanoparticle's local effect. Magnetic nanoparticles that can be controlled with an external magnetic field or emit heat under the influence of electromagnetic radiation have potential in biology and medicine. For example, particles with increased magnetic moment are used both in medical diagnostics and for the treatment of various conditions. Some studies also indicate that magnetic nanoparticles can have antifungal properties. For these applications, scientists suggest using barium ferrite nanoparticles in biocompatible coating.

"There are several methods of manufacturing coated nanoparticles with given characteristics, but all of them include toxic reagents. We have developed an environmentally friendly technology for the production of barium ferrite with the use of sweet flag extract. The surface of these particles has additional biological properties and the particles themselves possess all necessary magnetic and geometrical characteristics," said Prof. Larissa Panina, a Ph.D. in Physics and Mathematics from BFU.

The team mixed an extract made from dried sweet flag roots with barium and iron salts and water. Then, the mixture was heated to evaporate the liquid and obtain powder. After that, the powder was sintered at temperatures up to 900°C, and nanoparticles were formed. To study their morphology, the team used scanning electron microscopy. This method is based on scanning the surface of a studied object with an electron beam and applies to fragments that are just several nanometers in size. The average size of the hexagon-shaped nanoparticles was from 20 to 50 nm. The team also studied the crystalline structure and elemental composition of the particles using X-ray structural analysis and energy dispersive spectroscopy and found out that the new particles had no admixtures.

The barium ferrite nanoparticles synthesized by the team were active against four species of fungi that cause various diseases of fruit and flowering plants. Even in small concentrations, the nanoparticles were able to slow down the growth of pathogens. In the course of the Fenton reaction, the ions of iron in barium ferrite reacted with peroxides and reactive oxygen forms (OH radicals) appeared. Being extremely active, they reacted with substances in harmful cell walls, damaged them, and thus slowed down the growth of pathogens. According to the authors of the study, this is a universal mechanism that might make the nanoparticles active against other species of fungi, too.

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NO ONE ASKED US

Study finds U.S. first responders have mixed feelings about COVID-19 vaccine

UNIVERSITY OF MIAMI MILLER SCHOOL OF MEDICINE

Research News

 

Firefighters and emergency medical services workers are at high risk of exposure to COVID-19 while on the job and pose an additional risk of transmitting the virus to others. Although vaccines are a promising public health tool for reducing COVID-19 transmission, little has been known about the perceptions of the COVID-19 vaccine among first responders.

To provide insight, a University of Miami Miller School of Medicine-led study queried a national sample of U.S. firefighters and emergency medical services workers through an anonymous online survey. The study results, published online Feb. 1 in the Journal of Occupational and Environmental Medicine, revealed that more than half of the first responders who replied were uncertain about or reported low acceptance of the vaccine.

"Through the national sample of firefighters and emergency medical services workers, we gained insight into the workforce's hesitancy about the COVID-19 vaccine," said study lead and senior author Alberto J. Caban-Martinez, D.O., Ph.D., M.P.H., associate professor of public health sciences in the Division of Environment & Public Health at the Miller School. "We can leverage this study's information to design workplace interventions that educate and encourage our first responders to receive the COVID-19 vaccine."

Demographics determine perceptions

Of the 3,169 respondents to the survey, 48.2% expressed high acceptability of the COVID-19 vaccine, 24.2% were unsure, and 27.6% reported low acceptability. The results also revealed key demographic characteristics -- such as age, race, ethnicity, education, marital status, and job ranking -- for each group of respondents.

Additionally, across all ten geographic regions of the Federal Emergency Management Agency, the southeast (43.1%), the southwest (32.7%) and the west (34.1%) had the highest proportion of first responders who showed low COVID-19 vaccine acceptability.

"An important predictor we discovered from our study was that first responders who had not reported receipt of the influenza vaccine in the prior season had higher odds of being unsure about or not wanting to receive the COVID-19 vaccine," Dr. Caban-Martinez said.

In the study, the co-authors note the importance of tailoring public health campaigns for educating those sub-groups of firefighters and emergency medical service workers who identified as unsure or expressed low COVID-19 acceptability.

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The future of solar technology: New technology makes foldable cells a practical reality

International research team creates solar cells with unprecedented flexibility and resistance

PUSAN NATIONAL UNIVERSITY

 NEWS RELEASE 10-FEB-2021

Research News

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IMAGE: FOLDABLE PEROVSKITE SOLAR CELLS USING CARBON NANOTUBE-EMBEDDED ULTRATHIN POLYIMIDE CONDUCTOR view more 

CREDIT: PUSAN NATIONAL UNIVERSITY

With the recent development of foldable mobile phone screens, research on foldable electronics has never been so intensive. One particularly useful application of the foldable technology is in solar panels.

Current solar cells are restricted to rigid, flat panels, which are difficult to store in large numbers and integrate into everyday appliances, including phones, windows, vehicles, or indoor devices. But, one problem prevents this formidable technology from breaking through: to be integrated into these items, solar cells need to be foldable, to bend at will repeatedly without breaking. Traditional conducting materials used in solar cells lack flexibility, creating a huge obstacle in developing fully foldable cells.

A key requirement for an efficient foldable conductor is the ability to withstand the pressure of bending within a very small radius while maintaining its integrity and other desirable properties. In short, a thin, flexible, transparent, and resilient conductor material is needed. Professor Il Jeon of Pusan National University, Korea, elaborates, "Unlike merely flexible electronics, foldable devices are subject to much harsher deformations, with folding radii as small as 0.5 mm. This is not possible with conventional ultra-thin glass substrates and metal oxide transparent conductors, which can be made flexible but never fully foldable."

Fortunately, an international team of researchers, including Prof. Jeon, have found a solution, in a study published in Advanced Science. They identified a promising candidate to answer all of these requirements: single-walled carbon nanotube (SWNT) films, owing to their high transparency and mechanical resilience. The only problem is that SWNTs struggle to adhere to the substrate surface when force is applied (such as bending) and requires chemical doping. To address this problem, the scientists embedded the conducting layer into a polyimide (PI) substrate, filling the void spaces in the nanotubes.

To ensure maximum performance, they also "doped" the resulting material to increase its conductivity. By introducing small impurities (in this case, withdrawn electrons to molybdenum oxide) into the SWNT-PI nanocomposite layer, the energy needed for electrons to move across the structure is much smaller, and hence more charge can be generated for a given amount of current.

Their resulting prototype far exceeded the team's expectations. Only 7 micrometers thick, the composite film exhibited exceptional resistance to bending, almost 80% transparency, and a power conversion efficiency of 15.2%, the most ever achieved in solar cells using carbon nanotube conductors! In fact, as pointed out by Prof. Jeon, "The obtained results are some of the best among those reported thus far for flexible solar cells, both in terms efficiency and mechanical stability."

With this novel breakthrough in solar harvesting technology, one can only imagine what next-generation solar panels will look like.

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Reference

Title of original paper: Foldable Perovskite Solar Cells Using Carbon Nanotube-Embedded Ultrathin Polyimide Conductor
Journal: Advanced Science
DOI: https://doi.org/10.1002/advs.202004092

About Pusan National University

Pusan National University, located in Busan, South Korea, was founded in 1946, and is now the no. 1 national university of South Korea in research and educational competency. The multi-campus university also has other smaller campuses in Yangsan, Miryang, and Ami. The university prides itself on the principles of truth, freedom, and service, and has approximately 30,000 students, 1200 professors, and 750 faculty members. The university is composed of 14 colleges (schools) and one independent division, with 103 departments in all.

Website: https://www.pusan.ac.kr/eng/Main.do

About Jeon Lab

Website: https://www.jeonlab.com

About the authors

Prof. Il Jeon is a Professor of Chemistry Education and Chemical Materials at Pusan National University, Korea. He completed his undergraduate degree at Oxford University, UK, and received a Ph.D. in Chemistry with honors from the University of Tokyo, Japan. Following this, he worked at LG Display Co. Ltd., South Korea, as a Senior Research engineer and then started a postdoctoral fellowship at the University of Tokyo. After completing his fellowship, he worked as an assistant professor and lecturer at the same university. His research group at Pusan National University is working on nanocarbon materials, namely, endohedral fullerene, and carbon nanotubes, for optoelectronics and energy device applications. The team is also developing bioelectronics and integration of artificial intelligence with material science.

Dr. Jungjin Yoon is a postdoctoral researcher at the Pennsylvania State University (PSU), US. He obtained his Bachelor's and Ph.D. degrees in mechanical engineering at Kyung Hee University and Seoul National University, Korea, respectively. Before joining PSU, he worked at the Korea Institute of Science and Technology, Korea, as a postdoctoral researcher. With his research experience in mechanical engineering and material science, his research interest now is the perovskite-based flexible optoelectronic devices, the development of transparent conductors, and the device fabrication/integration process.

Temple-Led Team: COVID containment measures in Philly associated with rise in gun violence

Pandemic has exacerbated issues such as poverty, unemployment and structural racism that are empirically tied to violence in Philadelphia

TEMPLE UNIVERSITY HEALTH SYSTEM

Research News

 

IMAGE: JESSICA H. BEARD, MD, MPH, FACS, ASSISTANT PROFESSOR OF SURGERY AND DIRECTOR OF TRAUMA RESEARCH AT THE LEWIS KATZ SCHOOL OF MEDICINE AT TEMPLE UNIVERSITY. view more 

CREDIT: TEMPLE UNIVERSITY HEALTH SYSTEM

(Philadelphia, PA) - While the COVID-19 pandemic brought most of the country to a standstill in March 2020, Philadelphia trauma surgeons noticed an alarming trend in the incidence of firearm violence. Instead of decreasing with containment measures, firearm-injured patients were presenting at even higher rates to Temple University Hospital and other trauma centers around the city.

A team led by Jessica H. Beard, MD, MPH, FACS, Assistant Professor of Surgery and Director of Trauma Research at the Lewis Katz School of Medicine at Temple University (LKSOM), sought to determine the magnitude of Philadelphia's increase in firearm violence during the COVID-19 pandemic. They also aimed to understand potential causes of the increase by trying to pinpoint when the increase occurred. They hypothesized that two major events of 2020 could explain the increase in firearm violence in Philadelphia: the enactment of public health policies designed to contain COVID-19 and a national reckoning with systemic racism, including widespread protests sparked by the police killing of George Floyd.

In a new research letter published in JAMA, Dr. Beard and her team used the Philadelphia Police registry data of shooting victims from January 1, 2016 through November 26, 2020 to determine when the spike in firearm violence began. They examined changes in the number of individuals shot per week in the city following the enactment of Philadelphia's first COVID-19 containment policy (closure of non-essential businesses) on March 16, 2020, and following the killing of George Floyd on May 25, 2020.

The team found that there were 7,159 individuals shot in the city overall during the 256 weeks included in the study. Prior to Philadelphia's first COVID-19 containment policy, there was an average of 25 individuals shot per week. In the weeks after that policy was put in place on March 16, 2020, the average number of individuals shot per week climbed to 46. A time-series analysis found that the increase in firearm violence was strongly associated with the enactment of COVID-19 containment policies. The killing of George Floyd was not associated with any significant increase in the rate of gun violence in the study model.

These findings indicate a significant and sustained increase in firearm violence in Philadelphia following enactment of COVID-19 containment policies.

"In the city of Philadelphia, shootings are often geographically concentrated in lower-income communities," Dr. Beard said. "These communities have not only been disproportionately affected by the coronavirus disease itself, but the pandemic and its associated policies have also exacerbated issues that were already present, including unemployment, poverty, structural racism and place-based economic disinvestment, which are empirically tied to firearm violence in Philadelphia. Our research shows that the measures put in place to contain the pandemic for health and safety reasons had a significant and sustained association with increased firearm violence in the city. In addition to mitigating the impact of COVID-19 in Philadelphia, we must also come together to address what is now an epidemic of gun violence in the city."

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Other researchers involved in the study include Amy J. Goldberg and Zoë Maher in the Department of Surgery, Division of Trauma and Surgical Critical Care, at LKSOM; Sara F. Jacoby in the Department of Family and Community Health at the University of Pennsylvania School of Nursing; Beidi Dong in the Department of Criminology, Law and Society, at George Mason University; Elinore J. Kaufman in the Division of Traumatology, Surgical Critical Care and Emergency Surgery at the Perelman School of Medicine at the University of Pennsylvania; and senior author Christopher N. Morrison in the Department of Epidemiology at the Mailman School of Public Health at Columbia University.

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Paid maternity leave has long-term health benefits

Study shows positive effects after more generous leave became law in Norway

UNIVERSITY OF GEORGIA

Research News

 

A study of women who were new mothers in the late 1970s found that those who were given longer, paid maternity leave lived healthier lives as they entered middle age.

While universal paid maternity leave is now available in many Western European nations, this has not always been the case. A new study by University of Georgia economist Meghan Skira looked at the health of Norwegian mothers before and after paid maternity leave became law in 1977. She found that the health benefits of leave continued for years after their children were born.

Skira, an associate professor in the Terry College of Business, worked with economist Aline Bütikofer of the Norwegian School of Economics and Julie Riise of the University of Bergen on the study. Their paper, "The Impact of Paid Maternity Leave on Maternal Health," is online in the American Economic Journal: Economic Policy and appears in the journal's February 2021 print edition.

Public health studies and some economic studies have found positive short-term benefits for women and children of extended postnatal leave, but the approach by Skira and her co-authors was different. They were able to analyze the longer term health effects of paid maternity leave for thousands of Norwegian women both before and after leave laws were implemented in July 1977.

"This sharp change in who was eligible for paid maternity leave provides a nice natural experiment," said Skira. "It provides an environment where we can examine the causal health effects of paid leave. Our findings show that having access to paid leave leads to important health benefits for mothers around age 40."

The women who gave birth after July 1977 were in better health across the board as they hit middle age, but the biggest gains in health were seen among low-income women who may not have been able to afford to take the full amount of unpaid leave available before the change.

Skira and her co-authors examined biometric data like body mass index, blood pressure, cholesterol levels and rates of diabetes combined with self-reported rates of pain, mental health, tobacco use and exercise habits to paint a comprehensive picture of women's health at 40.

The women who had access to paid leave had 2.5% to 3.7% lower BMI than those who did not have access. They were 10% less likely to have high blood pressure. They were 16% to 18% less likely to smoke and 14% to 20% more likely to exercise regularly.

"We know that women are healthier at 40, but we don't know exactly why. We did not find significant changes in income or employment among the women who had access to the reform, so the health improvements are unlikely due to income effects. We speculate that a reduction in stress, more time to recover from childbirth, and perhaps breastfeeding played a role," she said. "More research on exactly why maternal health improved would be valuable."

The study does draw clear causation between women staying home after giving birth and being healthier as they enter middle age.

"In a typical observational study, you would be worried that those who take more leave are different in ways that might make their health better or worse," Skira said. "Those who take longer leave may be wealthier or have more family support. On the other hand, those who have more postpartum health problems may take more leave. But here, because there is this sharp change in access to paid leave for everyone, the concerns about selection into leave-taking are minimized."

This was possible because the Norwegian Institute of Public Health collects health data on its citizens around age 40 as a way to benchmark the nation's well-being. Because of the so-called Age 40 Program, Skira and her co-authors had access to a tremendous set of birth, health and income data for the women who gave birth immediately before and after the law changed in 1977.

Norway expanded its paid leave policies again in 1987 and 1992, but those expansions marginally improved women's health at age 40, Skira said.

"There does seem to be evidence of diminishing returns to leave length," Skira said. "But maternal health is only one dimension of maternity leave to consider -- effects on children's outcomes, women's labor market attachment and employers are also important."

As the mothers of 1977 continue to age, Skira hopes to examine their use of long-term sick leave and disability insurance to see if the health benefits they gained in middle age made a difference in their quality of life as they entered retirement. It's too early to tell what the long-term benefits of this policy shift will be, she said.

"While things have changed since the late 1970s, understanding the effects of this policy change is important since it extended leave benefits from a level similar to what the U.S. offers today under the Family and Medical Leave Act," Skira said. "Our results, therefore, may inform the current debate over family leave policy."

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