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Science News for January 31, 2003


Chaos in the heart

A team of scientists has discovered that chaotic wave patterns in the heart's electrical pulses can be controlled and potentially terminated using a weak periodic modulation. This discovery could lead to new methods for treating cardiac fibrillation, a life-threatening condition.

SourceMax-Planck-Gesellschaft·JournalScience·DateJan 31, 2003

Report to aid nation in managing freshwaters

The report highlights the need for a multi-faceted approach to manage freshwater resources, including empowering local groups and increasing communication among disciplines. It also recommends protecting minimally impaired ecosystems and creating awareness of healthy ecosystems' importance to everyday living.

SourceVirginia Tech·JournalEcological Applications·DateJan 31, 2003

The making of a brain

The study reveals that the SIX3 protein secures anterior neural cells by blocking out a posteriorizing signal, crucial for forebrain formation. In mouse models and zebrafish, forced expression of Six3 rescues forebrain development, demonstrating its critical role in vertebrate head development.

SourceCold Spring Harbor Laboratory·JournalGenes & Development·DateJan 31, 2003

Using sewage sludge as fertilizer

Researchers found liquid sewage sludge to be just as effective as traditional synthetic fertilizers in improving crop yields and nutrient content. The study also showed low levels of heavy metals in crops, groundwater, and soil, making it a promising environmentally safe alternative for waste disposal.

SourceAmerican Society of Agronomy·JournalAgronomy Journal·DateJan 31, 2003

Sealing a cell's fate

Dr. Rossant and colleagues find that Flk1 and Tal1 proteins steer embryonic cells towards endothelial, hematopoietic, or smooth muscle fates. The study provides further evidence for a common hemangioblast progenitor cell, which can differentiate into the three cell types.

SourceCold Spring Harbor Laboratory·JournalGenes & Development·DateJan 31, 2003