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Science News for August 12, 2015


Greenland ice sheet's winds driving tundra soil erosion, Dartmouth study finds

A Dartmouth study reveals that strong winds blowing off the Greenland Ice Sheet are eroding soil and vegetation in the surrounding tundra, making it less productive for grazing animals. The study found that wind-driven soil erosion is more widespread near the ice sheet but restricted to steep south-facing slopes farther away.

SourceDartmouth College·JournalAnnals of the Association of American Geographers·DateAug 12, 2015

Study links cardiorespiratory fitness, thinner gray matter and better math skills in kids

A new study reveals that 9- and 10-year-old children who are aerobically fit tend to have significantly thinner gray matter than their peers, associated with better mathematics performance. The study suggests cardiorespiratory fitness contributes to gray matter thinning, a normal process of child brain development.

McMaster hematologist identifies different limb loss syndromes

A McMaster University hematologist has identified various limb loss syndromes, including symmetric peripheral gangrene and venous limb gangrene, which can be caused by septic shock, cancer, and blood clotting disorders. The treatment for these conditions involves the use of blood thinners and replacement of protective factors.

SourceMcMaster University·JournalNew England Journal of Medicine·DateAug 12, 2015

Fetal ECG during labor offers no advantage over conventional fetal heart rate monitoring

A recent US study found that fetal electrocardiogram ST segment analysis does not improve outcomes during labor and delivery or decrease cesarean deliveries compared to conventional fetal heart rate monitoring. The research involved 11,108 randomized patients and found no significant differences in negative outcomes.

SourceUniversity of Texas Medical Branch at Galveston·JournalNew England Journal of Medicine·DateAug 12, 2015

Fetal ECG readings offer no advantage over heart rate monitoring during labor

A new study by the National Institutes of Health found no significant differences in birth complications between fetal ECG monitoring and traditional heart rate monitoring during labor. Infants in ECG-monitored groups were slightly more likely to have low Apgar scores, but overall outcomes remained unchanged.

Evolution peaks on tropical mountain

Research on Mount Kinabalu in Malaysian Borneo found that most endemic species are younger than the mountain itself and have evolved to adapt to cooler conditions. The study revealed two groups of unique species, with some originating from far-away areas and others evolving from local species.

Genetic analysis supports elevating Cape Parrot to new species

A recent study published in PLOS ONE suggests that the Cape Parrot should be classified as a distinct species due to its genetically distinct markers. The research analyzed DNA samples from five Poicephalus species and found that the Cape Parrot shares common ancestry with other subspecies only at around 2 million years ago.

SourcePLOS·JournalPLOS ONE·DateAug 12, 2015

Flexible, biodegradable device can generate power from touch (video)

Scientists have developed a biodegradable nanogenerator made with DNA that can capture and convert everyday motion into electrical power. The flexible device has been successfully tested, lighting up multiple LEDs with gentle tapping, and offers a promising solution for reducing e-waste and increasing portable electronics' battery life.

SourceAmerican Chemical Society·JournalACS Applied Materials & Interfaces·DateAug 12, 2015

Can stem cells cause and cure cancer?

A recent study by Fen Wang and Wallace McKeehan reveals that errors in FGF transmission can activate dormant stem cells, leading to cancer. The research supports the existing theory that cancer is a stem cell disease and holds promise for future cancer therapies.

SourceTexas A&M University·JournalJournal of Biological Chemistry·DateAug 12, 2015

Better estimates of worldwide mercury pollution

A new study provides more accurate estimates of worldwide mercury pollution, revealing Asia produces over double the previous estimated amount. The research uses a top-down approach combining measured air concentrations with a global simulation to calculate mercury emissions, improving estimates and refining pollution-control strategies.

SourceMassachusetts Institute of Technology·JournalAtmospheric Chemistry and Physics·DateAug 12, 2015

Pelvic pain may be common among reproductive-age women, NIH study finds

Researchers found that nearly 30% of reproductive-age women experienced chronic or cyclic pelvic pain, with endometriosis women reporting higher levels of pain. Physicians may want to ask patients about pain during routine visits, and women should inform their doctors about any pain they're experiencing.

Quantum computing advance locates neutral atoms

Researchers at Penn State have developed a method for addressing individual neutral atoms using laser light, enabling the creation of quantum computers. The technique allows for precise control over qubits and enables quantum computing applications such as factoring large numbers used in secure codes.

SourcePenn State·JournalPhysical Review Letters·DateAug 12, 2015

Concern over claims about how technology affects young brains

Despite claims by Susan Greenfield that intense internet use harms adolescent brains, experts warn that there is currently no evidence to support these claims. Research suggests that social networking sites can enhance friendships and relationships, while computer games do not lead to impulsiveness or aggression.

SourceBMJ Group·JournalThe BMJ·DateAug 12, 2015

Antidepressant drug trials criteria not generalizable

Most antidepressant efficacy studies (AETs) now exclude a significant proportion of depressed patients, including those with comorbid psychiatric disorders and low rating scale scores. This trend suggests that AETs may be even less generalizable than previously thought, limiting their applicability to real-world populations.

SourceLifespan·JournalMayo Clinic Proceedings·DateAug 12, 2015

How lipids are flipped

Researchers from ETH Zurich have determined the structure of a flippase, PglK, that flips lipid-linked oligosaccharides, revealing a novel mechanism. The discovery sheds light on fundamental biological processes and may lead to therapeutic approaches for diseases associated with glycosylation disorders.

SourceETH Zurich·JournalNature·DateAug 12, 2015

This week from AGU: Natural arches, Italian earthquake, Canadian rivers & research papers

Scientists have found a way to detect internal damage in Utah's natural arches that could lead to their collapse. A study also reveals how a 16th-century Italian earthquake changed the course of the Po River over thousands of years. Researchers explore the effects of smaller rivers from Canada's Arctic islands on the North Atlantic.

SourceAmerican Geophysical Union·JournalGeophysical Research Letters·DateAug 12, 2015

Fireflies predict network loyalty

Researchers use firefly swarm approach to predict user loyalty in social networks, analyzing connections and community structure. The algorithm offers a probability of staying in a given network, providing valuable insights for service providers.

SourceInderscience Publishers·JournalInternational Journal of Communication Networks and Distributed Systems·DateAug 12, 2015

Significant breath from streams and rivers

Research by Umeå University reveals that streams and rivers release notable amounts of carbon dioxide from organisms' respiratory processes. This finding highlights the importance of understanding these mechanisms in predicting the impact of climate change on greenhouse gas concentrations.

SourceUmea University·JournalNature Geoscience·DateAug 12, 2015

Breakthrough in 'marriage-broker' protein

Scientists at McGill University have made a breakthrough in understanding the role of Netrin1, a protein that brings cells together and maintains their healthy relationships. The study used genetic technology to remove all Netrin1 from mouse embryos, revealing a greater disruption of the nervous system than previously thought.

SourceMcGill University·JournalCell Reports·DateAug 12, 2015

Scent matters to fur seals

Researchers at Bielefeld University discovered that Antarctic fur seals have a unique 'scent profile' that enables them to identify their offspring and family members. This finding suggests that scent plays a crucial role in the animals' social behavior, particularly in recognizing kin and selecting mates.

SourceBielefeld University·JournalProceedings of the National Academy of Sciences·DateAug 12, 2015

Protons and antiprotons appear to be true mirror images

The RIKEN collaboration has confirmed proton-antiproton symmetry through a high-precision experiment testing CPT invariance. The results show that charge-to-mass ratios are identical within 69 parts per trillion, constraining violations of the standard model and informing future research on antimatter and dark matter.

SourceRIKEN·JournalNature·DateAug 12, 2015

UTHealth research: Older breast cancer patients less likely to benefit from chemo

A study published in the Journal of American Geriatrics Society found that chemotherapy's effectiveness in prolonging life for older adults with most types of cancer is reduced for women over 80 with breast cancer. However, combining chemotherapy with another treatment may improve mortality risk reduction for this age group.

SourceUniversity of Texas Health Science Center at Houston·JournalJournal of the American Geriatrics Society·DateAug 12, 2015

Octopus genome sequenced

The California two-spot octopus genome was fully sequenced, revealing widespread genomic rearrangements and a dramatic expansion of genes involved in neuronal development. The findings provide an important foundation for evolutionary studies and deeper investigations into the genetic mechanisms underlying cephalopod-specific traits.