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Science News for October 19, 2006


Asia's odd-ball antelope gets collared

The Wildlife Conservation Society has fitted GPS collars on eight saiga antelopes in the Mongolian Gobi Desert, aiming to better understand their movements and develop a comprehensive conservation strategy. The saiga numbers have plummeted by 95% due to poaching for Chinese medicines and competition with livestock.

The star, the dwarf and the planet

Researchers have directly imaged a faint brown dwarf companion to the star HD 3651, which hosts a planet. The discovery provides valuable information on planetary formation and offers a unique insight into the co-formation of planets and brown dwarfs around the same star.

SourceESO·JournalMonthly Notices of the Royal Astronomical Society·DateOct 19, 2006

Protein important in blood clotting may also play a role in fertility

A study by University of North Carolina researchers found that the protein CIB1 plays a critical role in proper sperm formation in mice. Mice missing both copies of the gene are infertile, while those with only one copy are fertile. This discovery sheds light on fertility genes and their potential impact on human infertility.

SourceUniversity of North Carolina Health Care·JournalMolecular and Cellular Biology·DateOct 19, 2006

Bacteria that use radiated water as food

Researchers found a self-sustaining community of bacteria that rely on radioactive uranium to convert water molecules into usable energy, living 2.8 kilometers below Earth's surface. The discovery expands Earth's biosphere and raises excitement about the potential for life on Mars.

SourceIndiana University·JournalScience·DateOct 19, 2006

Decoding Mars's cryptic region

Mars Express's OMEGA instrument reveals a thick slab of dry ice in the cryptic region, but dust contamination is caused by geysers triggered by sunlight heating the soil beneath. The geysers create spots and fans, which suggest a process that could significantly contribute to the dust contamination observed.

SourceEuropean Space Agency·JournalNature·DateOct 19, 2006

Fusion in the fast lane

Researchers from Max Planck Institute and Collège de France developed two protocols for controlled membrane fusion, revealing that the process is surprisingly fast. The fusion process can be completed within 200 nanoseconds, with an average expansion velocity of centimeters per second.

SourceMax-Planck-Gesellschaft·JournalProceedings of the National Academy of Sciences·DateOct 19, 2006

Folate supplement interacts with malaria treatment in pregnant women

A randomized trial found that high-dose folate supplementation increased the likelihood of treatment failure when used with sulfadoxine-pyrimethamine for malaria in pregnant Kenyan women. The study advises against using high-dose folate supplements in antenatal clinics where sulfadoxine-pyrimethamine is used to treat or prevent malaria.

SourcePLOS·JournalPLOS Clinical Trials·DateOct 19, 2006

The neurobiology behind why eating feels so good

Researchers have found that ghrelin stimulates the same pleasure and reward neurons as food, sex, and drugs, leading to increased food intake. Ghrelin binds to receptors in the brain's ventral tegmental area (VTA), triggering dopamine production.

SourceJCI Journals·JournalJournal of Clinical Investigation·DateOct 19, 2006

JCI table of contents: October 19, 2006

Two studies published in the Journal of Clinical Investigation reveal key roles for PLC-gamma-2 and NF-kappa-B in immune responses. PLC-gamma-2 regulates osteoclast development and B cell differentiation, while NF-kappa-B controls endothelial cell function in models of sepsis and cancer.

SourceJCI Journals·JournalJournal of Clinical Investigation·DateOct 19, 2006

Carnegie Mellon awarded grant

Carnegie Mellon University has been awarded a six-year, $4.2 million grant to create a new type of reconfigurable integrated circuit for chip manufacturers. Researchers will work on technology that seeks to break the bottleneck by joining mechanical probes with integrated circuits in a design that allows for their reconfiguration.

In early embryos, cilia get the message across

Researchers at the Salk Institute discovered a non-structural gene, duboraya, that influences cilia function and regulates left-right patterning in zebrafish embryos. The gene's activation by Wnt signaling pathway helps create a counterclockwise flow necessary for establishing left versus right asymmetry.

SourceSalk Institute·JournalNature Genetics·DateOct 19, 2006

A road is more than a road

The University of Vermont is introducing a new systems education project to reform its engineering curriculum, emphasizing the connection between traffic and social, environmental, and economic factors. The project aims to equip students with skills to analyze complex problems and provide solutions that consider multiple perspectives.

Greenland ice sheet on a downward slide

Researchers use novel technique to analyze regional changes in Greenland's massive ice sheet, finding dramatic losses concentrated in coastal regions. The study shows an annual net loss of ice equal to nearly six years of average water flow from the Colorado River, with 20% more mass lost than received from new snowfall each year.