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Science News Archive July 2009 - Page 4


Page 4 of 23

Common household pesticides linked to childhood cancer cases in Washington area

Researchers at Georgetown University Medical Center found a higher level of common household pesticides in the urine of children with acute lymphoblastic leukemia (ALL), a type of childhood cancer. The study suggests an association between pesticide exposure and development of childhood ALL, but researchers caution that it does not pro...

SourceGeorgetown University Medical Center·JournalTherapeutic Drug Monitoring·DateJul 28, 2009

Microbes and their hosts -- exploring the complexity of symbiosis in DNA and cell biology

This special issue of DNA and Cell Biology delves into the complexities of symbiosis, revealing how microorganisms adapt to changing environments and host responses. The issue highlights various studies on bacterial interactions with their hosts, exploring mechanisms of adaptation and functional plasticity in constrained mutualisms.

SourceMary Ann Liebert, Inc./Genetic Engineering News·JournalDNA and Cell Biology·DateJul 28, 2009

Study finds human population expanded during late Stone Age

A study found that human populations began to expand in size in Africa around 40,000 years ago, supporting the hypothesis that population growth played a significant role in the evolution of human cultures. The research used genetic evidence and computational approaches to simulate the evolution of genetic lineages over time.

SourcePLOS·JournalPLOS ONE·DateJul 28, 2009

Rethinking Brownian motion with the 'Emperor's New Clothes'

Researchers at the University of Illinois have found that Brownian motion does not always follow a Gaussian curve, as previously thought. The study reveals extreme displacements that were not predicted by Einstein's statistical molecular theory, suggesting new design possibilities and potential corrections to textbooks.

SourceUniversity of Illinois at Urbana-Champaign, News Bureau·JournalProceedings of the National Academy of Sciences·DateJul 27, 2009

Iron-binding drug could help diabetics heal stubborn wounds, says Stanford/Einstein study

Researchers discovered that high glucose levels in diabetic tissue lead to reduced vascular endothelial growth factor production and impaired HIF-1a function. Deferoxamine, an iron-binding drug, has been shown to improve wound healing by restoring HIF-1a-p300 interaction, leading to increased growth factor production.

SourceStanford Medicine·JournalProceedings of the National Academy of Sciences·DateJul 27, 2009

Common food dye may hold promise in treating spinal cord injury

A common food additive, Brilliant Blue G, has been identified as a potential treatment for spinal cord injury. The compound stops the cascade of molecular events that cause secondary damage, allowing patients to recover from paralysis. Researchers have successfully tested BBG in rats with spinal cord injuries, showing promising results.

SourceUniversity of Rochester Medical Center·JournalProceedings of the National Academy of Sciences·DateJul 27, 2009

Teasing apart T helper cells

A recent study published in the Journal of Experimental Medicine shows that IL-9 promotes a multiple sclerosis-like disease in mice. The research suggests that IL-9 production may be linked to the presence of TGF-beta rather than a specific Th cell subset, contradicting the theory of a unique 'Th9' cell subset.

SourceRockefeller University Press·JournalJournal of Experimental Medicine·DateJul 27, 2009

How the carrot approach facilitates learning

Researchers discovered that rewarding correct decisions can enhance brain function in the cortex and improve learning. Targeted manipulation of dopamine levels may lead to new possibilities in treating patients after a stroke or improving cognitive abilities.

SourcePLOS·JournalPLOS Biology·DateJul 27, 2009

Disease threat may change how frogs mate

Research by Dr. Amber Teacher reveals that wild frog populations in the UK are changing their mating behaviour in response to Ranavirus infection, with healthy frogs selecting mates based on their Major Histocompatibility Complex (MHC) type.

SourceWiley·JournalMolecular Ecology·DateJul 27, 2009

Mom and dad as financial advisors

A new study published in Journal of Youth and Adolescence found that parents play a significantly greater role in shaping young adults' financial habits than work experience or high school financial education. The study's four-step model analyzes the process of financial socialization in first-year college students, highlighting the im...

SourceSpringer·JournalJournal of Youth and Adolescence·DateJul 27, 2009

Heart failure: Women different than men

The review article reveals striking sex differences in heart failure risk factors and patient prognosis between men and women. Women tend to develop HF at an older age with stronger hearts, while men are more likely to have coronary artery disease as the underlying cause.

SourceAmerican College of Cardiology·JournalJournal of the American College of Cardiology·DateJul 27, 2009

1 nano-step closer to weighing a single atom

Researchers have created a new class of ultra-sensitive nanoscale devices capable of detecting the vibrations of individual gold nanoparticles. By studying bipyramid-shaped nanoparticles with highly uniform sizes and shapes, scientists overcame previous limitations in understanding damping in these systems.

SourceUniversity of Melbourne·JournalNature Nanotechnology·DateJul 27, 2009

Study finds significant number of kids experience family homelessness

A new study by UCLA and RAND Corp. researchers found that 7% of fifth-graders and their families have experienced homelessness, while African American children are more likely to suffer from mental health problems. The study's findings suggest a significant association between family homelessness and emotional, behavioral, and developm...

SourceUniversity of California - Los Angeles·JournalAmerican Journal of Public Health·DateJul 27, 2009

ACC positions quality at center of health-care reform

The American College of Cardiology advocates for a 'Quality First' approach to health care reform, focusing on increasing quality of care and ensuring patient access. The ACC has endorsed six principles necessary for effective reform, including universal coverage, focus on patient value, and payment reforms that reward quality.

SourceAmerican College of Cardiology·JournalJournal of the American College of Cardiology·DateJul 27, 2009

Soldiers turn a march into a charge

Engineers at the University of Leeds are developing a system to harness kinetic energy from soldiers' marches, capturing up to 15% of their foot-power to reduce pack weight. The project also aims to adapt radio equipment to run on low power budgets, enhancing soldier mobility and reducing fatigue.

Intensive glucose control halves complications of longstanding type 1 diabetes

A study published in the Archives of Internal Medicine found that intensive glucose control halves the rate of eye and kidney damage in people with longstanding type 1 diabetes. The study also showed lower rates of cardiovascular disease events and improved vision loss rates compared to conventional control.

Assisted reproductive techniques alter the expression of genes that are important for metabolism

Research using mice suggests that assisted reproductive techniques like IVF and ICSI can increase the incidence of metabolic problems in offspring, including higher blood pressure, increased fasting glucose levels, and more body fat. The study found altered expression of genes important for nutrient transport in the placenta.