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Science News for December 4, 2007


Cosmopolitan microbes -- hitchhikers on Darwin's dust

Scientists have confirmed that microbes can travel across continents on dust particles, surviving for centuries and defying intercontinental transport. Geo-chemical analyses of Charles Darwin's samples revealed diverse microbes, including ascomycetes and eubacteria, with wind-fractionated dust from West Africa reaching the Caribbean.

SourceWiley·JournalEnvironmental Microbiology·DateDec 4, 2007

Why do high school seniors drink?

A new study identifies four major motivators for high school senior drinking: experimentation, thrill-seeking, relaxation, and coping with life issues. Students who drink for these reasons show the heaviest and most problematic drinking behaviors, according to the study published in Prevention Science.

SourceSociety for Prevention Research·JournalPrevention Science·DateDec 4, 2007

Stowers Institute's Hawley Lab identifies factors responsible for restart of meiotic cycle

The Hawley Lab has identified two molecular mechanisms that restart the meiotic cycle in oocytes, including the controlled expression of Polo kinase and the inactivation of inhibitory protein Matrimony. This discovery has significant implications for understanding egg maturation and releasing, as well as treating infertility and cancer.

SourceStowers Institute for Medical Research·JournalPLOS Biology·DateDec 4, 2007

It's not just a kid thing: Fluoridated tap water benefits older adults even more

A recent study by Indiana University researchers found that fluoridated tap water reduces dental fillings and costs for all age groups, with older adults benefiting the most due to limited access to dental insurance. The study breaks new ground on adult dentistry, highlighting the importance of community water fluoridation for people o...

SourceIndiana University·JournalJournal of Public Health Dentistry·DateDec 4, 2007

A company's good reputation can be a bad thing

A study by Michelle L. Roehm and Michael K. Brady found that high-equity brands initially face a disadvantage after failure, but may fare better when the issue is severe. This phenomenon can be attributed to a reduction in cognitive resources, allowing customers to focus on resolving the problem rather than re-evaluating the brand.

SourceUniversity of Chicago Press Journals·JournalJournal of Consumer Research·DateDec 4, 2007

Microbial fuel cells turn on the juice

Researchers at Washington University in St. Louis are developing microbial fuel cell kits and educational materials to teach high school students about science and engineering. The technology can efficiently convert dilute organic waste streams into electricity, making it a promising alternative for waste-to-energy conversion.

A call to action to prevent chronic diseases

Achieving a 2% annual reduction in mortality rates due to chronic diseases could prevent 36 million deaths by 2015. The authors urge key players, including governments, industries, and NGOs, to prioritize policies and programs to tackle chronic diseases, such as tobacco control, diet modification, and physical activity promotion.

SourceThe Lancet_DELETED·JournalThe Lancet·DateDec 4, 2007

Liver transplant offers survival benefits for patients of all sizes

A study of 25,647 adult liver transplant candidates found that obesity alone should not exclude patients from transplantation. Patients with high BMIs experience a significant survival benefit from liver transplantation and have similar rates of mortality after transplant compared to patients with normal BMI.

SourceWiley·JournalLiver Transplantation·DateDec 4, 2007

Spanish ecologists discover a novel route of viral transmission

Researchers found that avian polyomaviruses spread through an 'upwards vertical' route, from offspring to parents via nestling faeces, highlighting a previously unnoticed cost of parental care. This study may open new research agendas on the evolution of virulence and coevolution of vectors, viruses, and hosts in the wild.

SourcePLOS·JournalPLOS ONE·DateDec 4, 2007

Research forecasts increased chances for stormy weather

A study led by Purdue University predicts a significant increase in severe storms in the US, with areas like Atlanta and New York seeing more than double the chances of severe thunderstorms by the end of the century. The research used climate models to examine favorable conditions for storm formation.

SourcePurdue University·JournalProceedings of the National Academy of Sciences·DateDec 4, 2007

Research finds allergic children exposed to peanuts at younger ages despite recommendations to avoid

A study published in Pediatrics found that children with peanut allergies are being exposed to peanuts at younger ages than recommended. The median age of first exposure and reaction dropped from 22-24 months to 14-18 months over the last decade, suggesting a potential conflict between guidelines and real-world practices.

SourceChildren's Hospital of Pittsburgh·JournalPEDIATRICS·DateDec 4, 2007

Optimism isn't always healthy

A new study in Journal of Consumer Research found that optimistic thinking about future goals can lead to detrimental decisions, such as overindulging in unhealthy snacks. In contrast, focusing on commitment to a goal results in more consistent actions with its attainment.

SourceUniversity of Chicago Press Journals·JournalJournal of Consumer Research·DateDec 4, 2007

Health education about dengue fever 'insufficient' in Cambodia

A recent study published in PLoS Neglected Tropical Diseases found that health education regarding the prevention, diagnosis, and treatment of dengue fever is inadequate in Cambodia. The study suggests that these educational programs are accorded low priority, leading to poor resource allocation and lack of effective messaging.

SourcePLOS·JournalPLOS Neglected Tropical Diseases·DateDec 4, 2007

Fighting diseases of aging by wasting energy

By inefficiently powering mouse muscles, researchers found increased metabolic rates reduced vascular disease, obesity, and cancer, with no impact on the aging process itself. This approach may provide a novel strategy to address age-related diseases without slowing down aging.

Decoy makes sitting duck of superbugs

Scientists have developed a DNA-based therapy that can switch off antibiotic resistance in bacteria by delivering a short stretch of DNA as a decoy. This technology has the potential to slash the development time of new drugs and could give fresh patent life to existing antibiotics.

SourceNorwich BioScience Institutes·JournalProceedings of the National Academy of Sciences·DateDec 4, 2007

Neanderthal bearing teeth

A 100,000-year-old Neanderthal from Belgium showed faster tooth growth, suggesting more advanced dental development. This pattern is intermediate between early human ancestors and living people, indicating a recent condition unique to our species.

SourceMax-Planck-Gesellschaft·JournalProceedings of the National Academy of Sciences·DateDec 4, 2007

Can fruit flies help treat stroke and transplant patients?

Researchers discovered that fruit flies experience irreversible damage to their respiratory systems when exposed to brief bursts of oxygen after being starved of oxygen. This model provides a low-cost alternative for studying reperfusion injury, potentially leading to faster progress in mitigating its effects on humans.

SourcePLOS·JournalPLOS ONE·DateDec 4, 2007

Green morality

Research by Albert Bandura highlights how disguising environmentally harmful practices can have a negative impact on the environment and quality of life. He argues that we must switch on our environmental conscience to save the world from ecological degradation.

SourceInderscience Publishers·JournalInternational Journal of Innovation and Sustainable Development·DateDec 4, 2007