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Science News Archive April 2007 - Page 7


Page 7 of 17

Why some aphids can't stand the heat

Researchers found that a single gene in symbiotic bacteria determines aphid thermal tolerance. The gene's mutation affects heat-shock protein production, leading to reduced reproduction and survival in hot conditions. This discovery highlights the critical role of symbiotic bacteria in insect ecology.

SourceUniversity of Arizona·JournalPLOS Biology·DateApr 19, 2007

Molecular signature may identify cisplatin-sensitive breast tumors

Researchers at MGH Cancer Center have discovered a molecular pathway underlying sensitivity to cisplatin in triple-negative breast cancers. The study found that p63 and p73 expression levels can predict cisplatin therapy effectiveness, leading to the design of a clinical trial for patients with advanced triple-negative breast cancer.

SourceMassachusetts General Hospital·JournalJournal of Clinical Investigation·DateApr 19, 2007

Map predicting spread of avian flu

A model predicting the probability of infection from one farm to another has been developed by Gert-Jan Boender and colleagues, highlighting two poultry-dense areas in the Netherlands where epidemic spread is possible. The authors conclude that local control measures are unlikely to halt an unfolding epidemic in these regions.

SourcePLOS·JournalPLOS Computational Biology·DateApr 18, 2007

Mystery of fossilized trees is solved

An international team of researchers has found evidence of the Earth's earliest forest trees, dating back 385 million years. The discovery includes upright stumps of fossilized trees that reached at least 8 meters in height, forming the first known forests on earth.

SourceCardiff University·JournalNature·DateApr 18, 2007

LASIK for older adults

A new study from the University of Illinois Chicago found that LASIK surgery is safe and effective for patients aged 40-69 years old, with reliable predictability of correction. The study also highlighted challenges faced by older adults, including difficulty with near vision after LASIK due to presbyopia.

SourceUniversity of Illinois Chicago·JournalOphthalmology·DateApr 18, 2007

Forming social memories

Researchers have identified a specific region in the frontal cortex as key to recording and learning social information. This discovery may improve understanding of mechanisms behind mental disorders affecting social skills, such as schizophrenia and autism.

SourceCNRS·JournalCognitive Neuroscience·DateApr 18, 2007

Depression: New therapy gives reason for hope

A study at the University of Bonn found that two men and a woman with severe depression experienced significant improvements in their symptoms after receiving deep brain stimulation. The therapy, which targets the nucleus accumbens area of the brain, showed promising results despite the small patient group.

SourceUniversity of Bonn·JournalNeuropsychopharmacology·DateApr 18, 2007

Smoking indicator of alcohol misuse

A study by Yale School of Medicine researchers found that cigarette smoking status can be used as a clinical indicator for alcohol misuse, which presents an opportunity for intervention. Non-daily smokers are five times more likely to have a problem with alcohol compared to people who have never smoked.

SourceYale University·JournalArchives of Internal Medicine·DateApr 18, 2007

Scent prediction

An interdisciplinary team predicts the scent intensity of lily-of-the-valley fragrance components using a computer model of their olfactory receptors. The study confirms that electronic surface structures determine the interaction between scented molecules and human scent receptors.

SourceWiley·DateApr 18, 2007

How the brain copes with shifty eyeballs

Researchers pinpointed brain regions critical to piecing together a continuous view of the world. By using an illusion known as boundary extension, they found two brain areas involved in extrapolating scenes and integrating discrete samples of surrounding space.

SourceCell Press·JournalNeuron·DateApr 18, 2007

How genetic malfunction causes a form of retardation

A study published in Neuron reveals that genetic mutations in SHP-2 lead to an imbalance in brain cell development, resulting in mental retardation. The researchers found that the mutation causes neurons to overgrow and inhibits glial cell formation, disrupting neural balance.

SourceCell Press·JournalNeuron·DateApr 18, 2007

Ames Laboratory researchers rethink zinc

Researchers at the Ames Laboratory have discovered a new family of zinc compounds that can be tuned to exhibit physical properties similar to other materials. These compounds, which are over 85% zinc, display extraordinary tunability, allowing scientists to study magnetism and potentially create superconducting materials.

SourceDOE/Ames National Laboratory·JournalNature Physics·DateApr 17, 2007

What's in the water? Estrogenic activity documented in fish caught in Pittsburgh's rivers

A new study documents estrogenic activity in fish caught in Pittsburgh's rivers, suggesting feminizing chemicals from industrial and municipal wastes. The findings demonstrate the potential health risks of consuming river-caught fish, particularly for endocrine-mediated health endpoints like some cancers and developmental problems.