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Science News for May 21, 2015


Study uses farm data to aid in slowing evolution of herbicide-resistant weeds

Farmers using multiple herbicides per application (83 times less likely to have resistance) and rotating herbicide mixing are the most effective tools in managing herbicide resistance. Management factors, not environmental or landscape variables, play a crucial role in preventing resistance.

Mosquito sex-determining gene could help fight dengue fever

Researchers at Virginia Tech's Fralin Life Science Institute have discovered a genetic switch called Nix that underlies the difference between male and female mosquitoes. By harnessing this trait, they hope to develop mosquito control strategies by converting females into harmless males or eliminating deadly females.

SourceVirginia Tech·JournalScience·DateMay 21, 2015

Raising a glass to the holidays

A new study published in BMC Medicine found that people in England consume an additional 12 million bottles of wine each week due to holidays and special occasions. This increase in alcohol consumption can lead to health issues, highlighting the need for more accurate measurement and targeted interventions.

SourceBMC (BioMed Central)·JournalBMC Medicine·DateMay 21, 2015

Endocrine-disrupting chemicals in baby teethers

Researchers at Goethe University found that two out of ten plastic rings in baby teethers release chemicals with hormone-like effects. These additives can inhibit the effects of androgens such as testosterone and act like natural oestrogen in the body. The study highlights the need for manufacturers, regulatory agencies, and scientists...

SourceGoethe University Frankfurt·JournalJournal of Applied Toxicology·DateMay 21, 2015

Lowly 'new girl' chimps form stronger female bonds

A new study of social relationships in wild apes reveals that low-ranking female chimpanzees form stronger bonds with other females of similar status. The researchers analyzed daily records for 53 adult females over 38 years and found that these low-ranking pairs were more likely to seek each other out than those from higher social ranks.

SourceDuke University·JournalAnimal Behaviour·DateMay 21, 2015

Time is muscle in acute heart failure

Joint recommendations from the Heart Failure Association, European Society of Emergency Medicine, and Society for Academic Emergency Medicine emphasize urgent diagnosis and treatment of acute heart failure. The guidelines outline tests, treatments, and management strategies to reduce mortality and morbidity.

SourceEuropean Society of Cardiology·JournalEuropean Heart Journal·DateMay 21, 2015

Lawrence Livermore researchers use seismic signals to track above-ground explosions

Researchers created a method to determine source characteristics of near-earth surface explosions using seismic stations in Turkey. They found the Syrian tunnel bomb blast was likely around 40 tons, contradicting initial claims of 60 tons. The technique serves as a forensic tool for investigators and governmental agencies.

SourceDOE/Lawrence Livermore National Laboratory·JournalGeophysical Research Letters·DateMay 21, 2015

Premature aging: Scientists identify and correct defects in diseased cells

Researchers have identified and corrected defects in diseased cells, restoring normal activity in Cockayne syndrome patients. The study reveals the role of an enzyme, HTRA3 protease, in mitochondrial defects that contribute to premature aging. Therapeutic strategies using HTRA3 inhibitors or antioxidants may soon be tested in patients.

SourceInstitut Pasteur·JournalProceedings of the National Academy of Sciences·DateMay 21, 2015

Simulations predict flat liquid

Researchers have predicted a liquid phase in atomically thin golden islands that patch small pores of graphene, where gold atoms flow and change places in the plane. The liquid state is possible when the edge of graphene pore stretches the metallic membrane.

SourceAcademy of Finland·JournalNanoscale·DateMay 21, 2015

Workplace intervention improves sleep of employees' children

A workplace intervention designed to reduce work-family conflict and increase schedule flexibility has a positive influence on the sleep patterns of employees' children. Children whose parents participated in the STAR intervention showed improved sleep quality compared to those in a control group, according to researchers at Penn State.

SourcePenn State·JournalJournal of Adolescent Health·DateMay 21, 2015

Requiem for an ancient tongue worm

Researchers have discovered a 425-million-year-old fossil of an ancient tongue worm parasite, providing significant insights into the origins of parasitism. The new species, Invavita piratica, is remarkably well-preserved and has been found attached to its host animal, an ostracod, in Herefordshire, England.

SourceYale University·JournalCurrent Biology·DateMay 21, 2015

New biotechnology for high efficiency purification of live human cells

Researchers have developed a new technology that uses synthetic microRNA switches to purify live human cells with improved efficiency. The method, which involves identifying unique miRNAs for each cell type, shows promise for clinical applications and could lead to more homogeneous cell pools and better cell therapy outcomes.

The flight of the oryx

Research suggests that Doha's rise is driven by relational economic geography and urban development, with the Oryx antelope logo symbolizing its growth. However, the city lacks cohesive development plans and amenities for knowledge workers, which may hinder its success.

SourceInderscience Publishers·JournalInternational Journal of Knowledge-Based Development·DateMay 21, 2015

Savannahs slow climate change

New research reveals that savannahs are a major driver of carbon sequestration globally, outpacing tropical rainforests. The semi-arid ecosystems can control fluctuations in atmospheric CO2 concentrations, and their importance should not be overlooked in climate policy discussions.

SourceLund University·JournalScience·DateMay 21, 2015

Team publishes findings about compound with potential for treating rheumatoid arthritis

A team of researchers from Montana State University has identified a new chemical compound called IQ-1S that shows promise in treating rheumatoid arthritis. The study found that IQ-1S significantly reduced the severity of collagen-induced arthritis and inhibited the destruction of cartilage and bone.

SourceMontana State University·JournalJournal of Pharmacology and Experimental Therapeutics·DateMay 21, 2015

Memories influence choice of food

A study published in Neuron found that people tend to prefer snacks they can recall better, even if they are less attractive. The researchers used fMRI scans and mathematical modeling to understand how memory influences decision-making, revealing an increase in communication between the hippocampus and ventromedial prefrontal cortex.

SourceUniversity of Basel·JournalNeuron·DateMay 21, 2015

Odds are that chronic gamblers are often also depressed

A longitudinal study found that chronic gamblers are more likely to experience depressive problems, with 73% of those with significant gambling issues also suffering from depression. Early prevention programs targeting impulsive individuals and poor relationships with friends may help prevent these issues.

SourceSpringer·JournalJournal of Gambling Studies·DateMay 21, 2015

Fine particulate air pollution associated with increased risk of childhood autism

A study by the University of Pittsburgh found an association between exposure to fine particulate air pollution and an increased risk of childhood autism. The research estimated that children exposed to higher levels of PM2.5 during pregnancy and early life were at a 1.5-fold greater risk of developing ASD.

Emoticons may signal better customer service ;)

A study found that customers rate customer service agents higher when they use emoticons in their responses, indicating a sense of emotional connection. Agents who respond quickly also receive positive ratings, as this creates a feeling of social presence.

SourcePenn State·JournalComputers in Human Behavior·DateMay 21, 2015

Symbiosis turns messy in 13-year cicadas

A new study by CIFAR Fellow John McCutcheon's lab found that bacteria in cicada guts have split into many separate but interdependent species. This phenomenon leaves the cicadas reliant on a bloated genome and multiple species to create essential amino acids.

SourceCIFAR·JournalProceedings of the National Academy of Sciences·DateMay 21, 2015

Beyond average

Researchers have developed high-throughput techniques to quickly and easily give every cell in a sample a unique genetic barcode, enabling scientists to analyze complex tissues at the single-cell level. This breakthrough allows for deeper understanding of cell diversity and gene expression.

SourceHarvard Medical School·JournalCell·DateMay 21, 2015

Penn researchers show that mental 'map' and 'compass' are two separate systems

Researchers at the University of Pennsylvania found that mice use separate systems to determine their location and direction, with environmental cues influencing place recognition but not heading retrieval. The study used identical rooms with different markings on the north wall, which allowed researchers to isolate the two processes.

SourceUniversity of Pennsylvania·JournalProceedings of the National Academy of Sciences·DateMay 21, 2015

Infections can affect your IQ

A nationwide Danish register study tracking 190,000 individuals found a clear correlation between hospitalization due to infections and impaired cognitive ability. The study shows that even after treatment, patients can experience lasting effects on their IQ scores.

SourceAarhus University·JournalPLOS ONE·DateMay 21, 2015

New model predicts fish population response to dams, other ecological factors

Researchers developed a model to assess how dams affect sea-run fish populations, finding that abundance and distribution increased when mainstem dams were removed or passage efficiency improved. The model can predict ecological responses of fish populations and evaluate management actions for fish migrating between fresh and saltwater.

SourceNOAA Northeast Fisheries Science Center·JournalICES Journal of Marine Science·DateMay 21, 2015