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Science News Archive 2009 - Page 26


Page 26 of 277

Exposures to metals and diesel emissions in air linked to respiratory symptoms in children

A new study found that exposure to airborne metals like nickel and vanadium, as well as diesel exhaust particles, are associated with respiratory symptoms in young children. The study controlled for other risk factors and suggests improved regulatory action is needed to protect urban children.

SourceColumbia University's Mailman School of Public Health·JournalAmerican Journal of Respiratory and Critical Care Medicine·DateNov 23, 2009

Why circumcision reduces HIV risk

Male circumcision significantly reduces HIV infection risk by 60% in rural Uganda men. The removal of foreskin tissue containing HIV target cells explains most of the protection. Circumcision also reduces genital ulcer disease by lowering rates of trauma-induced ulcers, not just those caused by herpes.

SourcePLOS·JournalPLOS Medicine·DateNov 23, 2009

Is global warming unstoppable?

A University of Utah scientist argues that energy conservation doesn't save energy, but instead spurs economic growth and accelerated energy consumption. The study finds a constant link between global energy use and accumulated economic productivity, tied to a physical constant of 9.7 milliwatts per inflation-adjusted dollar.

SourceUniversity of Utah·JournalClimatic Change·DateNov 23, 2009

Diabetics show alarming increase in morbid obesity

A recent study by Loyola University Health System found that one out of five adults with Type 2 diabetes is morbidly obese. The rate of morbid obesity among people with diabetes increased by 141% between 1976 and 2006, highlighting the growing public health implications.

SourceLoyola Medicine·JournalJournal of Diabetes and its Complications·DateNov 23, 2009

Scientists watch as peptides control crystal growth with 'switches, throttles and brakes'

Researchers produced single-molecule resolution images of peptide-mineral interaction, revealing mechanisms that molecules use to bind to surfaces. Peptides slow down or speed up crystal growth depending on conditions, offering potential solutions for pathological mineralization and kidney stone treatment.

SourceDOE/Lawrence Livermore National Laboratory·JournalProceedings of the National Academy of Sciences·DateNov 23, 2009

Research reveals exactly how coughing is triggered by environmental irritants

Researchers have identified the reaction inside the lungs that can trigger coughing when exposed to certain air pollutants and irritants. The study found that switching on receptor proteins called TRPA1 on nerve endings in the lungs triggers a cough reflex, which could potentially be treated by blocking these receptors.

SourceImperial College London·JournalAmerican Journal of Respiratory and Critical Care Medicine·DateNov 23, 2009

Visual assistance for cosmic blind spots

Researchers at Max Planck Institute for Astrophysics create a system called information field theory (IFT) to reconstruct incomplete image data. IFT asks two questions to determine the probability of images based on measured data and prior knowledge, allowing for optimal reconstruction in areas where telescopes are blind.

SourceMax-Planck-Gesellschaft·JournalPhysical Review D·DateNov 23, 2009

The unequal world of health data

A lack of quantity and quality of health data from poor settings threatens global research, warns Peter Byass. Alternative strategies to improve health data representativeness are discussed.

SourcePLOS·JournalPLOS Medicine·DateNov 23, 2009

Johns Hopkins researchers track down protein responsible for chronic rhinosinusitis with polyps

Johns Hopkins researchers found that a protein called vascular endothelial growth factor (VEGF) is responsible for the cell overgrowth in chronic rhinosinusitis with polyps. This discovery gives scientists a new target for treating this form of the disease, which typically resists current treatments.

SourceJohns Hopkins Medicine·JournalAmerican Journal of Respiratory and Critical Care Medicine·DateNov 23, 2009

Rescuing male turkey chicks

A new technique using infrared spectroscopy can accurately determine the gender of six-week-old turkey poults with over 95% accuracy, potentially saving millions of male chicks from being killed shortly after birth. This method could be used by the breeding industry to identify female eggs for breeding and select female turkeys.

SourceSpringer·JournalAnalytical and Bioanalytical Chemistry·DateNov 23, 2009

Lessons for HIV learned from monkey control of SIV infection

Researchers have discovered that SIV induces a vigorous immune response in both natural and susceptible hosts, but only in natural hosts is the response brought under control. This study provides new insights into how to control HIV infection of humans by understanding the mechanisms behind SIV's rapid control of immune activation.

SourceJCI Journals·JournalJournal of Clinical Investigation·DateNov 23, 2009

Drug ads ineffective for boosting sales, could cost taxpayers: UBC-Harvard study

A new study published in Archives of Internal Medicine found that direct-to-consumer advertising (DTCA) for clopidogrel had no significant effect on sales, contributing to a $207 million price increase for Medicaid. The study suggests that pharmaceutical companies may be passing on ad costs to consumers through higher prices.

SourceUniversity of British Columbia·JournalArchives of Internal Medicine·DateNov 23, 2009

JCI table of contents: Nov. 23, 2009

A study identified a gene variant associated with elevated baseline blood pressure, suggesting it may be a good target for drugs to alleviate stress-induced hypertension. The researchers also found that the protein generated by this gene influences sympathetic activity and prevents stress-induced hypertension in both mice and humans.

SourceJCI Journals·JournalJournal of Clinical Investigation·DateNov 23, 2009

Achieving asthma control in preschoolers

A recent review highlights the need for improved asthma control in preschoolers, with key findings including the use of inhaled corticosteroids as a regular therapy for children with severe symptoms. The authors emphasize the importance of considering alternative conditions if children do not respond to optimal therapy.

SourceCanadian Medical Association Journal·JournalCanadian Medical Association Journal·DateNov 23, 2009

Gene implicated in stress-induced high blood pressure

Researchers identify phosducin's role in modulating blood pressure in response to stress, finding increased baseline and stress-dependent blood pressure in mice and humans. The study suggests phosducin as a promising target for developing drugs to alleviate stress-induced hypertension.

SourceJCI Journals·JournalJournal of Clinical Investigation·DateNov 23, 2009

Generating electricity from air flow

A group of researchers at City College of New York is developing a new way to generate power for planes and automobiles based on piezoelectrics, which convert kinetic energy into electricity. The devices might be mounted on cars or airplanes and would produce an output voltage that could run small electronic devices.

New hydrogen-storage method discovered

Researchers at Carnegie Institution create unique hydrogen-storage material by combining xenon with molecular hydrogen under pressure, offering a new family of materials to boost hydrogen technologies. The discovery reveals unusual bonding chemistry and potential applications in synthesizing energetic materials.

SourceCarnegie Institution for Science·JournalNature Chemistry·DateNov 22, 2009

Robotic clam digs in mudflats

Researchers at MIT have created a simple robot that can dig into mudflats at a rate of 1 cm per second, inspired by the burrowing mechanisms of Atlantic razor clams. The robotic clam is small, lightweight, and energy-efficient, making it suitable for underwater applications.

Dispensing prescription drugs in 3-month supplies reduces drug costs by a third

A new study from the University of Chicago Medical Center found that purchasing prescription drugs in three-month supplies rather than one-month supplies can reduce out-of-pocket costs by an average of 29% for patients. The total savings, including third-party payers, averaged 18%, with estimated annual savings of $148.6 million.

SourceUniversity of Chicago Medical Center·JournalApplied Health Economics and Health Policy·DateNov 20, 2009