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Science News for August 27, 1999


Natural repellant in Spanish cedar leaves could help tropical forests

Researchers have identified four new limonoids in Spanish cedar leaves that repel a specific insect pest, potentially helping protect endangered primary forests. Selecting seedlings with high concentrations of these substances may aid plantation-raised Spanish cedars and reduce the need for synthetic insecticides.

SourceAmerican Chemical Society·JournalJournal of Natural Products·DateAug 27, 1999
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Primate genus sheds light on great ape and human origins, as reported inScience

A team of scientists has discovered a new primate genus, Equatorius, which helps reshape the complex evolutionary tree around the time when the ancestor to humans and great apes arose. The research reveals that one species, Kenyapithecus wickeri, is more closely related to this ancestor than previously thought.

SourceAmerican Association for the Advancement of Science (AAAS)·JournalScience·DateAug 27, 1999

New satellite tools putting hurricanes in sharper focus

The new satellite-based tools provide unprecedented insights into tropical cyclones, allowing scientists to break them down into their component parts. This 'data fusion' technique enables the development of advanced hurricane forecasting methods, such as Wavetrak, which sheds light on the origin and intensity of these storms.

SourceUniversity of Wisconsin-Madison·DateAug 27, 1999

Study reveals how brain controls eating in normal rats

Researchers have shown how the fat hormone leptin works in the brain to trigger nerve cells that control eating. Leptin activates 'anorectic' nerve cells releasing appetite-suppressing neuropeptides, while inhibiting 'orexigenic' cells that release appetite-regulatory neuropeptides.

SourceHarvard Medical School·JournalNeuron·DateAug 27, 1999