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Science News for October 21, 2014


Animal therapy reduces anxiety, loneliness symptoms in college students

A study published in the Journal of Creativity in Mental Health found that animal-assisted therapy significantly reduced anxiety and loneliness symptoms among college students. The program, led by Dr. Leslie Stewart, involved interacting with a registered therapy dog named Sophie, resulting in a 60% decrease in self-reported symptoms.

SourceGeorgia State University·JournalJournal of Creativity in Mental Health·DateOct 21, 2014

Large variation in cesarean rates across US hospitals

A study analyzing 1.5 million births in US hospitals found significant variation in cesarean delivery rates, with rates ranging from 8% to 48% across hospitals. The analysis adjusted for maternal factors and hospital characteristics but did not account for parity or gestational age.

SourcePLOS·JournalPLOS Medicine·DateOct 21, 2014

Extremely high-resolution magnetic resonance imaging

The researchers have developed a novel measurement technique for MRI signals using a diamond sensor chip, detecting the signal from a single hydrogen atom and achieving an accuracy of better than one angstrom. This breakthrough brings them closer to imaging at the level of single molecules, with potential applications in structural bio...

SourceETH Zurich·JournalScience·DateOct 21, 2014

Could I squeeze by you?

Scientists developed a deeper understanding of ideal mesoporous nanoparticle design to maximize catalytic output. They modeled molecular movement within narrow channels and found that the optimal channel diameter balances pore size with reactant and product passage.

SourceDOE/Ames National Laboratory·JournalPhysical Review Letters·DateOct 21, 2014

Getting the salt out

Researchers at MIT and Saudi Arabia have developed a method to remove salt from produced water using electrodialysis, which can be economically viable for treating extremely high-salinity water. The technology could reduce the need for fresh water from other sources and minimize contaminated water disposal.

SourceMassachusetts Institute of Technology·JournalApplied Energy·DateOct 21, 2014

Hospitals converting to for-profit status show better financial health, no loss in quality

A new study found that hospitals converting to for-profit status improve their financial health but do not lower the quality of care they provide or reduce their service to poor or minority patients. The researchers assessed 4,571 hospitals over an eight-year period and found no noticeable change in patient outcomes or access to care.

Peanut in house dust linked to peanut allergy in children with skin gene mutation

A study published in Journal of Allergy and Clinical Immunology found a strong link between early-life exposure to peanut protein in household dust and peanut allergy in children genetically predisposed to a skin barrier defect. Exposure to peanut protein was associated with a three-fold increase in risk of school-age peanut allergy.

SourceKing's College London·JournalJournal of Allergy and Clinical Immunology·DateOct 21, 2014

Preservation technique for marginal livers prevents biliary stricture

A new preservation technique, sequential subnormothermic ex vivo liver perfusion (SNEVLP), has been shown to prevent ischemic type biliary stricture following liver transplantation using grafts from donations after cardiac death (DCD). SNEVLP reduces bile duct and endothelial cell injury post-transplantation compared to cold storage.

SourceWiley·JournalLiver Transplantation·DateOct 21, 2014

Osteoporosis screening guidelines miss many younger post-menopausal women

A new study found that US osteoporosis screening guidelines failed to identify the majority of younger post-menopausal women who experienced major fractures. The guidelines recommended testing and treatment for women aged 65+, but only predicted fractures in around 25% of those aged 50-64.

SourceUniversity of California - Los Angeles Health Sciences·JournalThe Journal of Clinical Endocrinology & Metabolism·DateOct 21, 2014

Study examines effect of hospital switch to for-profit status

A study of 237 converting hospitals found that for-profit status improved financial margins, but no association was found with changes in care quality or patient outcomes. The findings suggest that regulators and policymakers should consider the potential benefits of for-profit conversions primarily on financial health.

SourceJAMA Network·JournalJAMA·DateOct 21, 2014

YEDA-XL-Protein GmbH agreement

The Weizmann Institute of Science has developed a novel, highly active interferon variant called YNSalpha8. PASylation technology extended its half-life in the body, resulting in improved protection from disease progression in a mouse model of human multiple sclerosis.

SourceWeizmann Institute of Science·JournalJournal of Biological Chemistry·DateOct 21, 2014

Big black holes can block new stars

Researchers at Johns Hopkins University found that massive black holes can block the formation of new stars in mature galaxies. The study suggests that these jets of radio-frequency feedback streaming from central black holes prevent hot gas from cooling and collapsing into baby stars.

SourceJohns Hopkins University·JournalMonthly Notices of the Royal Astronomical Society·DateOct 21, 2014

Quantum holograms as atomic scale memory keepsake

Researchers from St. Petersburg State University developed a theoretical model for quantum memory in light, adapting classical hologram concepts to a quantum system. They demonstrated the possibility of retrieving specific portions of stored quantized light signals with precise control over space and time.

SourceSpringer·JournalThe European Physical Journal D·DateOct 21, 2014

Flu vaccine may hold key to preventing heart disease

A new study reveals how flu vaccines prevent heart attacks by stimulating the immune system to produce antibodies that protect the heart. The research identifies a protein called BKB2R as the key mechanism behind this protective effect, and suggests it could be harnessed to develop a vaccine against heart disease.

SourceElsevier·JournalVaccine·DateOct 21, 2014

Less-numerate investors swayed by corporate report presentation effects

New research finds that less-numerate investors are more susceptible to style and presentation effects of social responsibility reports, potentially leading to unintended judgments. Companies can design CSR reports with a uniform approach to project strategy, aligning text and graphics to convey information effectively.

Kung fu stegosaur

Paleontologists uncover fatal stab wound in allosaur's pubis bone, suggesting stegosaurs wielded their tails as deadly weapons. The discovery challenges conventional views of stegosaurs as lumbering plant-eaters, highlighting their impressive dexterity and fighting skills.

Reading a biological clock in the dark

A new study published in Cell reveals that our biological clocks work in tandem with the populations of bacteria residing in our intestines. The findings show that mice and humans with disrupted daily wake-sleep patterns exhibit changes in gut bacteria composition and function, increasing their risk for obesity and glucose intolerance.