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Science News for May 16, 2017


Oddball enzyme provides easy path to synthetic biomaterials

Researchers have developed a new method using terminal deoxynucleotidyl transferase (TdT) enzyme to produce precise, high molecular weight synthetic biomolecular structures. These structures can be tailored to create single-stranded DNA for self-assembling into ball-like containers for drug delivery or incorporating unnatural nucleotides.

SourceDuke University·JournalAngewandte Chemie·DateMay 16, 2017

Nicotine enhances bees' activity

Scientists at Queen Mary University of London found that nicotine-laced nectar enhances bumblebees' learning of flower colors and creates addiction-like behavior. The study suggests plants may manipulate pollinator behavior using psychoactive substances like nicotine.

SourceQueen Mary University of London·JournalScientific Reports·DateMay 16, 2017

First flat lens for immersion microscope provides alternative to centuries-old technique

Researchers at Harvard SEAS developed a first flat lens for immersion microscopy, providing a cost-effective and easy-to-manufacture alternative to the expensive hand polishing technique. This innovation enhances biological imaging capabilities by enabling the capture of fine detailed geometrical information of objects.

Immunotherapy against bee stings in some cases incomplete

Researchers found that commercial preparations for allergy shots often lack sufficient levels of key allergens, which could affect treatment success. Customized immunotherapy tailored to individual patients' reactions is a promising approach, but its development is still in its infancy.

Treatment in hospital by older doctors linked to higher death rates

A study published in The BMJ found that patients treated by older physicians have higher mortality rates than those cared for by younger physicians, except for those with high patient volumes. However, the researchers note that clinical skills and knowledge accumulated by more experienced physicians can lead to improved quality of care.

SourceBMJ Group·JournalThe BMJ·DateMay 16, 2017

Venom becomes more potent as brown snakes age

Research led by University of Queensland scientist Associate Professor Bryan Fry reveals that brown snake venom attacks the nervous system in young snakes and circulatory system in older ones. This transformation allows the venom to become more potent and deadly, causing internal bleeding and death in humans.

SourceUniversity of Queensland·JournalComparative Biochemistry and Physiology·DateMay 16, 2017

Key to 'superbug' antibiotic resistance discovered

A global health threat, superbugs are bacteria resistant to commonly used antibiotics. Monash University researchers identified the first important clues on how to counter superbug strategies, using electron microscopes and comparing data from antibiotic-resistant Staphylococcus aureus samples with non-resistant strains.

SourceMonash University·JournalmBio·DateMay 16, 2017

Ginger may help fight obesity and related disorders

Recent studies have built a consensus that ginger has beneficial effects against obesity, diabetes, cardiovascular diseases, and metabolic syndrome. Ginger regulates fat metabolism, suppresses carbohydrate digestion, and modulates insulin secretion to help combat these conditions.

SourceWiley·JournalAnnals of the New York Academy of Sciences·DateMay 16, 2017

Medical abortions obtained through online telemedicine shown to be effective, safe

A new study published in The BMJ found that medical abortions conducted through online telemedicine were successful in 95% of cases, with low rates of complications. Women were able to identify symptoms of potential issues and seek medical attention when needed, suggesting a safe and effective option for those seeking abortion access.

Penn Medicine hospitals receive $1.35 million from PA Department of Health to establish safe sleep program for infants

Penn Medicine's Pennsylvania Hospital and HUP receive a three-year grant to develop an innovative safe sleep program addressing newborn deaths in Philadelphia. The program aims to promote and evaluate safe sleep practices through nurse, parent, and community education, with the goal of reducing Sudden Unexpected Infant Death rates.

Study shows that cafes, restaurants and fast food outlets, and schools, are key sources of unhealthy, non-core foods for adolescents

A UK study found that cafes, restaurants, fast food outlets, and schools are significant sources of unhealthy non-core foods among adolescents. The study suggests that targeting specific environments, such as eateries and schools, rather than individuals, can be an effective strategy to reduce obesity rates.

Energy decay in graphene resonators

A recent study by ICFO researchers found a hybridization effect at high energies that could manipulate vibrational states and engineer hybrid states with mechanical modes. This discovery has the potential to open up new possibilities for manipulating vibrational states, studying collective motion of highly tunable systems.

SourceICFO-The Institute of Photonic Sciences·JournalNature Nanotechnology·DateMay 16, 2017

Study shows regular physical activity and reduced sedentary time reduces build-up of dangerous liver fat

A new study published at the European Congress on Obesity found that regular physical activity and avoiding inactivity significantly reduce the build-up of dangerous liver fat. The researchers discovered that moving about more throughout the day, such as breaking up long periods of sitting, is a key factor in maintaining metabolic health.

New Zika virus inhibitor identified

A new compound has been discovered that can inhibit the spread of the Zika virus, a significant step towards developing a treatment for its neurological complications. The compound blocks viral propagation in human cells and mice, offering promise as a starting point for an even more potent drug.

SourceSanford Burnham Prebys·JournalAntiviral Research·DateMay 16, 2017

Extreme weather has greater impact on nature than expected -- researchers launch roadmap

Researchers from Netherlands Institute of Ecology launch a new approach to studying extreme climatic events and their long-term impact on nature. The study highlights the difficulty in predicting consequences due to varying species responses, but also identifies key areas for future research.

SourceNetherlands Institute of Ecology (NIOO-KNAW)·JournalPhilosophical Transactions of the Royal Society of London (B )·DateMay 16, 2017

Undetected Ebola infection in international healthcare workers very unlikely

A new study published in PLOS Medicine found that undiagnosed Ebola virus infection was probably very rare among international healthcare workers deployed during the 2013-2015 outbreak. Despite asymptomatic cases occurring, no evidence of missed infections was found, but 'near miss' exposure incidents were common, putting frontline wor...

Plants call 911 to help their neighbors

Researchers at the University of Delaware discovered that plants release airborne chemicals when injured, alerting neighboring plants to boost their defenses. The injured plant sends signals through volatile organic compounds (VOCs), which stimulate nearby plants to grow more robust roots and increase malate transporter genes.

SourceUniversity of Delaware·JournalFrontiers in Plant Science·DateMay 16, 2017

Defective intercellular connections cause hydrocephalus

Research by the German Cancer Research Center has found that defective intercellular connections in the ependyma, a cellular layer separating the brain nervous tissue from CSF, cause hydrocephalus. This leads to blockage of the aqueduct, blocking cerebrospinal fluid flow and resulting in swollen heads and brain pressure.

Diverse populations make rational collective decisions

Researchers at Hokkaido University discovered that individual ants with different preferences can lead to a collective rational decision when making binary choices. The team found that the middle group of ants, which preferred a higher sucrose concentration, was the key to the colony's decision-making process.

SourceHokkaido University·JournalRoyal Society Open Science·DateMay 16, 2017

Complications from thyroid cancer surgery more common than believed, study finds

A large population-based study found that 6.5% of thyroid cancer patients experienced general post-operative complications, while 12% had complications specific to thyroid surgery within a year after their operation. Patients over 65 and those with more advanced thyroid cancer were at higher risk for these complications.

SourceMichigan Medicine - University of Michigan·JournalThe Journal of Clinical Endocrinology & Metabolism·DateMay 16, 2017

How hard did it rain on Mars?

Researchers found that heavy rainfall on early Mars carved out river-like channels and altered impact craters, similar to Earth's effects. The study used physics principles to understand the relationship between Martian atmosphere pressure, raindrop size, and rainfall intensity.

SourceElsevier·JournalIcarus·DateMay 16, 2017

Clot removal therapy effective outside six-hour window for some stroke patients

A randomized controlled trial found that endovascular treatment was effective in reducing disability among patients treated within 6 to 24 hours after a stroke. The study showed that nearly half of patients who received endovascular therapy had a good outcome at 90 days, compared to only 13% of those treated with clot-busting drugs alone.

Study of 3.5 million people shows 'healthy' obese people are still at higher risk of cardiovascular disease events than the general population

A study of 3.5 million people found that 'metabolically healthy' obese individuals have a higher risk of cardiovascular disease events, including heart failure and stroke, compared to normal-weight individuals with no metabolic abnormalities. The study also showed that the risk of CVD events increases with the number of metabolic abnor...

Weekly steroids strengthen and repair muscles

A new Northwestern Medicine study found that weekly glucocorticoid steroid doses, such as prednisone, promote muscle repair and recovery in muscle injuries. The study showed that daily doses cause muscle wasting, but weekly doses stimulate the production of annexins and KLF15 proteins, leading to improved muscle performance.

SourceNorthwestern University·JournalJournal of Clinical Investigation·DateMay 16, 2017

3-D printed ovaries produce healthy offspring

Researchers at Northwestern University have created bioprosthetic mouse ovaries using 3D printing, which not only ovulate but also give birth to healthy pups. The study's findings suggest that scaffold architecture plays a crucial role in follicle survival, paving the way for potential human applications.

SourceNorthwestern University·JournalNature Communications·DateMay 16, 2017