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Science News Archive September 2003 - Page 2


Page 2 of 10

Soldier or worker – what do the genes say?

Scientists identified 25 genes expressed differently in soldier and worker termites, with workers having higher levels of cellulose-degrading genes. Soldiers had higher levels of muscle- and cytoskeleton-related genes, suggesting their large mouthparts may be linked to these genes.

SourceBMC (BioMed Central)·JournalGenome Biology·DateSep 25, 2003

2003 HBP news tips

Studies found that people with high-normal blood pressure already have signs of target organ damage and are at increased risk for cardiovascular death. Potassium intake was also shown to reduce the size of a stroke in an animal study.

Salk news: A new view on brain function

Researchers Terrence Sejnowski and Simon Laughlin argue that the human brain operates as a highly efficient hybrid device capable of making sophisticated computations. The brain's long-distance communication systems have been optimized for energy efficiency through millions of years of evolution.

SourceSalk Institute·JournalScience·DateSep 25, 2003

Heading into difficulty?

Recent soccer heading practices have been found to lead to weaker neurocognitive performance, including decline in cognitive function, verbal learning difficulties, and reduced attention span. Research suggests that even short-term heading may pose a risk factor for long-term brain damage.

SourceFlorida Institute of Technology·JournalApplied Neuropsychology·DateSep 25, 2003

Danger on chromosome 15

Researchers have discovered four new genes in the most unstable part of chromosome 15 that contribute to Prader-Willi and Angelman syndromes and hereditary spastic paraplegia. These findings can expand genetic diagnosis of these diseases, including prenatal genetic counseling.

SourceUniversity of Pennsylvania School of Medicine·JournalAmerican Journal of Human Genetics·DateSep 25, 2003

Sex selection for social reasons unlikely to skew gender balance in Germany and UK

A survey of over 1,000 men and women in Germany and the UK found that there is little support for sex selection for non-medical reasons. In Germany, only 6% would take advantage of preconception sex selection, while in the UK, it was even lower at 21%. The researchers conclude that any potential gender imbalances due to sex selection a...