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Science News Archive 2007 - Page 48


Page 48 of 203

Drizzly mornings on Xanadu

Astronomers have found persistent morning drizzle of methane over the western foothills of Titan's major continent, Xanadu. The discovery suggests that moisture-laden clouds pushed upslope by winds condense to form a coastal rain, with the drizzle dissipating after local mid-morning.

SourceESO·JournalScience·DateOct 11, 2007

Researchers find evidence linking stress caused by the Sept. 11 disaster with low birth weights

A study found a significant increase in low birth weights among NYC babies born after the Sept. 11 disaster, suggesting stress may have contributed. The researchers discovered another peak in low birth weights around Christmas/New Year and April/May, indicating possible long-term effects of stress on fetal health.

Rapid analysis could cut health risks of volcanic ash

A new, rapid and cheap way of estimating the potential risk posed to human health by volcanic ash has been devised. The technique uses state-of-the-art laser technology to analyze the grain size of samples from around the world, allowing emergency response teams to quickly measure the potential risk without high-tech equipment.

SourceDurham University·JournalJournal of Environmental Monitoring·DateOct 10, 2007

Cancer conflict with chemotherapy treatment

Research suggests that young women with estrogen receptor-positive (ER+) breast cancer who undergo adjuvant chemotherapy do not experience higher survival rates than those with ER-negative tumors. The study, published in Breast Cancer Research, found a 5% difference in survival rates between the two groups.

SourceBMC (BioMed Central)·JournalBreast Cancer Research·DateOct 10, 2007

Neighborly care keeps stem cells young

The study found that aging stem cells in fruit flies experienced a decline in growth factor unpaired (upd), leading to reduced stem cell numbers. Artificially increasing upd levels delayed the loss of germline stem cells, suggesting that the niche's molecular signals govern stem cell behavior.

SourceSalk Institute·JournalCell Stem Cell·DateOct 10, 2007

The difference between fish and humans: scientists answer century-old developmental question

Researchers have discovered a key difference in the way gastrulation occurs between higher vertebrate species and less evolutionarily advanced animals. The study reveals that higher vertebrates acquire a new mechanism of 'cell intercalation' to position their axis at the midline, distinguishing them from fish and other lower vertebrates.

Expensive trainers are a waste of money

A recent study found that cheap and moderately priced running shoes provide similar cushioning impact and comfort as expensive trainers. Plantar pressure measurements showed no significant differences among the shoes, regardless of brand or price.

SourceBMJ Group·JournalBritish Journal of Sports Medicine·DateOct 10, 2007

Electroacupuncture at PC6 may decrease frequency of transient lower esophageal sphincter relaxation

A study published in the World Journal of Gastroenterology found that electroacupuncture at PC6 can decrease the frequency of transient lower esophageal sphincter relaxation (TLESR) induced by gastric distention in cats. The effect appears to act at the brain stem, mediated through nitric oxide (NO), CCK-A, and mu-opioid receptors.

SourceWorld Journal of Gastroenterology·JournalWorld Journal of Gastroenterology·DateOct 10, 2007

Potent peptides inhibit HIV entry into cells

Researchers at the University of Utah have developed new peptides that inhibit HIV entry into cells, with up to a 40,000-fold improved antiviral potency over previously reported D-peptides. These peptides resist degradation, making them suitable for oral administration and potentially reducing drug resistance.

SourceDOE/Brookhaven National Laboratory·JournalProceedings of the National Academy of Sciences·DateOct 10, 2007

Swedish lifestyle stops women working

Research published in BMC Public Health found that traditional family circumstances and workplace inequality contribute to long-term sick leave among Swedish women. Women reported high physical and mental demands at work, lack of flexibility, and bullying as factors affecting their health.

SourceBMC (BioMed Central)·JournalBMC Public Health·DateOct 10, 2007

Obesity boosts gullet cancer risk 6-fold

Research found that obese individuals are six times more likely to develop esophageal cancer compared to those of healthy weight. A combination of obesity, acid reflux, and smoking significantly increased the risk of adenocarcinomas of the esophagus.

SourceBMJ Group·JournalGut·DateOct 10, 2007

Can liver cirrhosis be partially cured?

Researchers found that prolonged antiviral therapy can improve residual liver function and reduce portal hypertension in patients with compensated hepatitis C virus-related cirrhosis. The study, published in the World Journal of Gastroenterology, suggests that this treatment approach may delay complications and prolong survival rates.

SourceWorld Journal of Gastroenterology·JournalWorld Journal of Gastroenterology·DateOct 10, 2007

HER-2 status predicts success of chemotherapy in breast cancer treatment, study finds

A recent study found that women with HER-2 positive breast cancer who receive Taxol alongside chemotherapy experience improved survival rates. In contrast, estrogen-receptor-positive and HER-2-negative patients do not benefit from the added treatment, offering a targeted approach to personalized medicine.

SourceMichigan Medicine - University of Michigan·JournalNew England Journal of Medicine·DateOct 10, 2007