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Science News for December 9, 2014


Wetlands more vulnerable to invasives as climate changes

A new study finds that climate change may tip the scales in favor of invasive wetland plants, which can outcompete native species due to their natural phenotypic plasticity. As environmental changes occur, invasive species will gain an advantage over native species, potentially reducing biodiversity and ecosystem function.

SourceDuke University·JournalEcological Applications·DateDec 9, 2014

Can doctors be trained in a 48-hour working week?

While some argue that a 48-hour working week has led to negative effects on medical training, others find no evidence to support these claims. Several reviews conclude that high-quality training can be delivered within this time frame, and trainees are increasingly satisfied with their training.

SourceBMJ Group·JournalThe BMJ·DateDec 9, 2014

New insight into risk of ankylosing spondylitis

Researchers at the University of Southampton have identified a genetic variation in the ERAP1 enzyme that increases an individual's susceptibility to Ankylosing Spondylitis. Genetic testing for this variation may enable earlier diagnosis and improved management of the condition.

SourceUniversity of Southampton·JournalProceedings of the National Academy of Sciences·DateDec 9, 2014

Delayed cancer diagnosis unlikely to be due to poor medical practice

Delayed cancer diagnoses are often caused by limitations in scientific knowledge and the delivery of healthcare, not poor professional performance. Despite this, policy initiatives focusing on GP referral times may be ineffective. Researchers advocate for better information about diagnostic challenges to improve diagnosis and care.

SourceBMJ Group·JournalThe BMJ·DateDec 9, 2014

E-cigarettes less addictive than cigarettes

Researchers found that e-cigarettes are less addictive than traditional cigarettes, with higher nicotine concentration and longer use leading to greater dependence. The study suggests that e-cigs may have health advantages over cigarettes due to lower levels of toxic substances.

SourcePenn State·JournalNicotine & Tobacco Research·DateDec 9, 2014

Nanoscale resistors for quantum devices

Researchers have created high-value, compact nanoscale resistors using thin-film chromium oxide, enabling faster development of quantum devices for computing and fundamental physics research. The new resistors can be tuned by controlling oxygen content, making them compatible with quantum phase-slip circuit requirements.

SourceAmerican Institute of Physics·JournalJournal of Applied Physics·DateDec 9, 2014

Storing hydrogen underground could boost transportation, energy security

Large-scale underground storage of low-pressure gaseous hydrogen offers several advantages over above-ground storage, including cost savings and increased volume capacity. Geologic storage solutions can service key hydrogen markets by storing large quantities of hydrogen fuel for transportation and grid-scale energy applications.

SourceDOE/Sandia National Laboratories·JournalInternational Journal of Hydrogen Energy·DateDec 9, 2014

Stain every nerve

Scientists at EMBL have developed a new technique called SNAP-tagging that allows researchers to study nerves in mice with unprecedented detail. This approach uses artificial tags to visualize complex structures and enable the tracking of activity in individual neurons.

SourceEuropean Molecular Biology Laboratory·JournalNature Methods·DateDec 9, 2014

Controlling obesity with potato extract

Researchers found that potato extract reduced weight gain in mice fed an obesity-inducing diet by 9 grams. The extract's high polyphenol content is responsible for its benefits. This study suggests that potato extracts could be a low-cost solution for preventing both obesity and type 2 diabetes.

SourceMcGill University·JournalMolecular Nutrition & Food Research·DateDec 9, 2014

Nanotechnology against malaria parasites

Researchers at the University of Basel have developed nanomimics of host cell membranes that trick malaria parasites. These nanomimics effectively disrupt the parasite's cycle, blocking its invasion of new red blood cells while exposing it to the immune system.

SourceUniversity of Basel·JournalACS Nano·DateDec 9, 2014

Put algae in your tank

Scientists have developed a unique combination of light and climate simulation to optimize algae cultivation, leading to higher yields and more efficient energy production. The system uses spectrum-tuned LEDs to simulate natural sunlight, allowing for precise control over the growth conditions of different algae species.

Penn researchers show commonalities in how different glassy materials fail

Penn researchers demonstrate that stiffness and strength scaling remain unchanged across various glassy materials, indicating a constant critical strain before catastrophic failure. This finding provides insight into the fundamental mechanism driving failure in glasses, suggesting cooperative motion of particles or atoms.

SourceUniversity of Pennsylvania·JournalProceedings of the National Academy of Sciences·DateDec 9, 2014

Doctors trained in higher expenditure regions spend more, may add to rising health care costs

A study by researchers at Milken Institute School of Public Health found that physicians trained in high-spending areas tend to practice more expensive medicine, even after completing residency. This can lead to higher healthcare costs for patients and contribute to the rising healthcare expenditure in the US.

Researchers assessing new treatment for common hospital-acquired infection, C. difficile

A team of researchers, led by Wayne State University's Steven M. Firestine, has been awarded a $3.2 million NIH grant to assess the effectiveness of a new treatment for C. difficile infection. The study aims to prevent the spore germination of the bacterium, which is responsible for the majority of hospital-acquired cases.

Fueling the future

A team of researchers at Argonne National Laboratory has developed an integrated modeling approach to understand the fluid dynamics of fuel injectors in modern engines. The study aims to improve engine design and simulation, reducing trial and error and increasing efficiency.

The gold standard

Computational modeling allows researchers to design efficient and affordable catalysts from gold, reducing the need for large amounts of expensive precious metals. The method has potential impact on energy-and-environment related fields, such as automotive exhaust and hydrogen production.

SourceUniversity of Pittsburgh·JournalCatalysis Science & Technology·DateDec 9, 2014

Simeprevir-based therapy offers cost-effective alternative in treatment of hepatitis C

A new study has shown that a simeprevir-based therapy is as effective as the standard of care in treating chronic Hepatitis C virus infection, with fewer adverse events. The study found that simeprevir was well-tolerated and could be a viable alternative for patients who cannot access or afford newer treatment options.

SourceUniversity of Pennsylvania School of Medicine·JournalThe Lancet Infectious Diseases·DateDec 9, 2014

Distraction, if consistent, does not hinder learning

A new study published in Psychological Science found that consistent distraction during learning does not hinder learning, but rather helps recall motor skills. The researchers discovered that dividing attention between tasks during learning can create an internal representation that boosts recall when a similar cue is present.

SourceBrown University·JournalPsychological Science·DateDec 9, 2014

The legend of the kamikaze typhoons

Historical records describe the intense Kamikaze typhoons that struck Japan in 1274 and 1281, preventing a Mongol conquest. A new sedimentary reconstruction reveals these storms were more frequent during this time period, supporting their significant role in shaping Japan's geopolitics.

SourceGeological Society of America·JournalGeology·DateDec 9, 2014

No increase in patient deaths or readmissions following restrictions to residents' hours

A recent study published in JAMA found that restricting residents' work hours to 16-24 hours per shift had no impact on patient deaths or readmissions. The researchers analyzed nearly 6.4 million Medicare patient hospital admissions between 2009 and 2012, but found no relative changes in mortality rates during this time period.

Abandoned wells can be 'super-emitters' of greenhouse gas

Researchers at Princeton University found that many abandoned oil and gas wells in Pennsylvania leak substantial quantities of methane. The study suggests that these 'super-emitting' wells could be a significant source of greenhouse gas emissions, potentially accounting for up to 10% of methane from human activities in the state.

SourcePrinceton University, Engineering School·JournalProceedings of the National Academy of Sciences·DateDec 9, 2014

Technology-dependent emissions of gas extraction in the US

Researchers from the Karlsruhe Institute of Technology measured high concentrations of organic pollutants emitted during fracking processes in the US, exceeding urban air quality standards by a factor of one thousand. The study found that certain technologies, such as open fracking facilities, release significantly more benzene and oth...

SourceKarlsruher Institut für Technologie (KIT)·JournalAtmospheric Chemistry and Physics·DateDec 9, 2014

Study shows cognitive training can improve brain performance of students in poverty

A study published in Frontiers in Human Neuroscience found that cognitive training can improve the brain performance of middle school students from poverty-stricken backgrounds. The program, called SMART, resulted in a 25% increase in gist reasoning and an 18% improvement in fact retention among students who received the training.

SourceCenter for BrainHealth·JournalFrontiers in Human Neuroscience·DateDec 9, 2014

Molecular decoys help overcome drug resistance

Researchers at Brown University have developed a new strategy to combat antibiotic-resistant bacteria by using molecular decoys. By administering fragments of antimicrobial agents alongside the full compounds, the researchers were able to increase their effectiveness against efflux pumps that stand guard along bacterial cell membranes.

SourceBrown University·JournalACS Infectious Diseases·DateDec 9, 2014

Online students give instructors higher marks if they think instructors are men

A recent study by NC State University found that online students tend to evaluate male instructors more favorably than female instructors, regardless of the instructor's actual gender. The researchers discovered a significant bias against women, with students who believed they were taught by men receiving higher ratings on various traits.

SourceNorth Carolina State University·JournalInnovative Higher Education·DateDec 9, 2014

James Ingle of Mayo Clinic Recognized for Breast Cancer Research

James Ingle, a renowned breast cancer expert at Mayo Clinic, has been awarded the 2014 William L. McGuire Memorial Lecture Award for his groundbreaking research on pharmacogenomics in breast cancer treatment. His work aims to develop personalized approaches to prevent breast cancer in high-risk women by identifying genetic biomarkers t...

Laughing gas studied as depression treatment

A pilot study found that two-thirds of patients with treatment-resistant clinical depression experienced an improvement in symptoms after receiving nitrous oxide, compared to one-third who improved with a placebo. The researchers are encouraged by the results and plan to replicate the study and test various concentrations of laughing gas.

SourceWashU Medicine·JournalBiological Psychiatry·DateDec 9, 2014