science newsletter: Science News SciGuru.com

Τετάρτη 19 Δεκεμβρίου 2012

Science News SciGuru.com

Evidence for Local Acceleration of CIR-Associated Suprathermal Particles at 1 AU
Study links personality changes to changes in social well-being
NASA's next-generation communications satellite arrives at Kennedy
Drug-Related Choice Predicts Future Drug Use
Antibiotics based on a new principle may defeat MRSA
A genetic defect in sex cells may predispose to childhood leukemia
Protein Creates Paths For Growing Nerve Cells
Food Insecurity Predicts Mental Health Problems in Adolescents

Evidence for Local Acceleration of CIR-Associated Suprathermal Particles at 1 AU

Posted: 18 Dec 2012 03:31 PM PST

Corotating interaction regions (CIRs) form when a stream of fast solar wind overtakes a parcel of slow wind that was emitted from the Sun at an earlier time. This interaction creates a compression region that corotates with the Sun and can strengthen to form shocks that accelerate particles.

Study links personality changes to changes in social well-being

Posted: 18 Dec 2012 12:40 PM PST

Researchers report that changes in social well-being are closely tied to one’s personality, with positive changes in one corresponding to similar changes in the other. Their study reveals potential new mechanisms that can help individuals thrive as they age.

Their findings appear in Social Psychological and Personality Science.

NASA's next-generation communications satellite arrives at Kennedy

Posted: 18 Dec 2012 11:41 AM PST

NASA's newest Tracking and Data Relay Satellite, known as TDRS-K, arrived Tuesday at the agency's Kennedy Space Center in Florida in preparation for a Jan. 29 launch. TDRS-K arrived aboard a U.S. Air Force C-17 from the Boeing Space and Intelligence Systems assembly facility in El Segundo, Calif.

Posted: 18 Dec 2012 09:56 AM PST

Scientists at the U.S. Department of Energy’s (DOE) Brookhaven National Laboratory have established a link between choice of drug-related images compared to other categories and drug use over the six months following the test. The research, published online in Drug and Alcohol Dependence on December 6, 2012, may ultimately help identify which individuals might be especially prone to relapse in drug addition.

Antibiotics based on a new principle may defeat MRSA

Posted: 18 Dec 2012 08:24 AM PST

Scientists at Karolinska Institutet have presented a new principle for fighting bacterial infections, in other words, a new type of antibiotic, in the FASEB Journal. The new antibiotic mechanism is based on selectively blocking the thioredoxin system in the cells, which is crucial to the growth of certain bacteria. Scientists hope to be able to treat such conditions as stomach ulcers, TB and MRSA.

A genetic defect in sex cells may predispose to childhood leukemia

Posted: 18 Dec 2012 08:15 AM PST

Researchers at the Sainte-Justine University Hospital Center and the University of Montreal have found a possible heredity mechanism that predisposes children to acute lymphoblastic leukemia (ALL), the most common type of blood cancer in children. According to their findings published in Genome Research, the presence of a genetic defect in the egg or sperm from which children having ALL arise may be a prerequisite for the disease to develop.

Protein Creates Paths For Growing Nerve Cells

Posted: 18 Dec 2012 08:01 AM PST

Working with mice, Johns Hopkins scientists have discovered that a particular protein helps nerve cells extend themselves along the spinal cord during mammalian development. Their results shed light on the subset of muscular dystrophies that result from mutations in the gene that holds the code for the protein, called dystroglycan, and also show how the nerve and muscle failings of the degenerative diseases are related.

Food Insecurity Predicts Mental Health Problems in Adolescents

Posted: 18 Dec 2012 07:45 AM PST

A study published in the December 2012 issue of the Journal of the American Academy of Child and Adolescent Psychiatry found that adolescents who experienced food insecurity in the past year have a higher prevalence of mental disorders than adolescents whose families have reliable access to food.