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Science News Archive May 2018 - Page 29


Page 29 of 44

Isotopic evidence for enhanced fossil fuel sources of aerosol ammonium in the urban atmosphere

A new chemical method is used to determine nitrogen stable isotope composition at natural abundance for ammonium, revealing source dependence of isotopic abundance in urban Beijing. Fossil fuel emissions are found to be a significant source of aerosol ammonium, accounting for 37-52% of initial ammonia concentrations.

Genetic analysis for certain childhood brain tumors soon a standard-of-care?

Researchers have developed criteria for routine genetic screening of patients with medulloblastoma, a rare and malignant tumor predominantly affecting children. This analysis of 1022 patients identified six genes frequently affected by genetic alterations, increasing cancer risk in up to 20% of the patient population.

Beyond killing tuberculosis

Researchers at McGill University Health Centre discovered that having excessive T cells can cause harm and imbalance disease tolerance, leading to tissue damage. The study found that a protein called cyclophilin D acts as a key checkpoint for T cell activation, controlling the body's ability to tolerate Mtb infection.

SourceMcGill University Health Centre·JournalScience Immunology·DateMay 11, 2018

Tiny spiders, big color

A team of Harvard scientists discovered that tiny Phoroncidia rubroargentea spiders use a combination of structural colors, pigment, and fluorescent material to produce their distinctive red and silver hues. The colors are stabilized by a tough cuticle layer, with the silver color relying on a reflective material similar to fish scales.

SourceHarvard University·JournalJournal of The Royal Society Interface·DateMay 11, 2018

Osteoporosis drug may benefit heart health

A study published in Journal of Bone and Mineral Research found that alendronate reduced the risk of one-year cardiovascular death by 67% and heart attack by 45%. The medication also showed protective effects against stroke, with a 17% reduced risk over 10 years.

SourceWiley·JournalJournal of Bone and Mineral Research·DateMay 11, 2018

The evolution of conflict resolution

A study published in Journal of the Royal Society Interface examines how humans resolve conflicts through social constructs, finding that 'host-guest norms' are a common solution. The research suggests that these norms may have evolved due to the dynamic nature of social networks and the importance of resource ownership.

SourceNortheastern University·JournalJournal of The Royal Society Interface·DateMay 10, 2018

Making next-generation preconception screening a reality for parents

A recent clinical study found that most parents-to-be want access to information from preconception carrier screening, including genetic variants associated with common disorders. However, the interpretation of these variants remains a significant challenge due to limited knowledge about their effects on health.

SourceCell Press·JournalAmerican Journal of Human Genetics·DateMay 10, 2018

Identification of bovine IVF embryos without chromosome abnormalities by live-cell imaging

A study by Tokyo University of Agriculture and Technology reveals that live-cell imaging can detect chromosomal abnormalities in bovine IVF embryos, increasing pregnancy success rates. The technique identifies half of morphologically transferable embryos as having nuclear/chromosomal abnormalities, which may lead to abortion.

SourceTokyo University of Agriculture and Technology·JournalScientific Reports·DateMay 10, 2018

Study examines the effects of physical activity during pregnancy

A recent study published in Acta Obstetricia et Gynecologica Scandinavica found that women with high physical activity levels had a reduced risk of acute cesarean sections. The Norwegian Fit for Delivery study also showed no other effects on labor or delivery outcomes.

SourceWiley·JournalActa Obstetricia Et Gynecologica Scandinavica·DateMay 10, 2018