In the News
Self-organization And Vegetation Collapse In Salt Marsh Ecosystems
It is a premise in ecology that undisturbed ecosystems are relatively stable, and hence that sudden changes in ecosystem are likely to result from external, mostly human influences. Johan van de Koppel, Daphne van der Wal, Jan P. Bakker, and Peter M. J. Herman present a combined theoretical and empirical study indicating that natural processes within salt-marsh ecosystems can lead to ecosystem destruction. Passport in Time (PIT): A Volunteer Program of the USDA Forest Service
Locate volunteer opportunities involving restoration of archaeological sites in our national forests and parks and places of historic interest and importance. "PIT volunteers work with professional FS archaeologists and historians on national forests throughout the U.S. on such diverse activities as archaeological survey and excavation, rock art restoration, survey, archival research, historic structure restoration, oral history gathering, and analysis and curation of artifacts."From the U.S. Department of Agriculture (USDA) Forest Service (FS). Protein Stops HIV-1 In Its Tracks In Hematopoietic Stem Cells
Hematopoietic stem cells (HSCs) are one of the few cell types able to resist infection with HIV-1 despite expressing the cell surface molecules to which HIV-1 binds before entering a cell. In a study that appears in the February issue of the Journal of Clinical Investigation, researchers from Harvard Medical School, Boston, show that HSC expression of a protein known as p21Waf1/Cip1/Sdi1 (p21) is required for HSCs to be resistant to infection with HIV-1. Proteins That Regulate Iron Metabolism Serve Critical Functions In Nut
Researchers have discovered that proteins that regulate the body's iron household play a vital role in making sure enough nutrients and water are absorbed in the intestine. Mice lacking these proteins suffer from weight loss and dehydration, the scientists report in Cell Metabolism. Comforted by carpet: How do floors and distance affect purchases?
Consumers who stand on carpeted flooring feel comforted, but they judge products close to them to be less comforting, according to a new study. Two Drugs Better Than One In Lowering Blood Pressure
The combination of aliskiren and valsartan at maximum recommended doses provides significantly greater reductions in blood pressure than does monotherapy with either agent alone in patients with hypertension (high blood pressure), and the tolerability profile of the combined treatment is similar to the two-single agent treatments. The findings are reported in a recent article. However an accompanying comment warns that the potentially life-threatening side effect of high blood potassium makes the treatment unlikely to make it to general practice or even primary prevention in specialist care. Study Shows Importance Of Exposure Age For Hanford Nuclear Workers' Ca
The ages at which workers are exposed to low doses of ionizing radiation apparently make a difference in whether they will develop cancer, according to a new University of North Carolina at Chapel Hill study. Comet Particles Tell New Story About Birth Of Solar System
Particulate materials captured from the comet Wild two have revealed clues about the birth of our solar system that counter some of the basic theories that the solar nebular is gently collapsing inward to form the sun and the planets. Sly Syndrome: Delivering Medicine To Fight Rare Genetic Disorder
Findings by the doctor who discovered Sly's Syndrome points to a new way to get big molecules, such as certain medications, across the blood-brain barrier. Sly Syndrome causes bone defects, mental retardation, vision and hearing problems, heart disease and premature death. Ancient Egyptian cosmetics: 'Magical' makeup may have been medicine fo
There's more to the eye makeup that gave Queen Nefertiti and other ancient Egyptians royals those stupendous gazes and legendary beauty than meets the eye. Scientists in France are reporting that the alluring eye makeup also may have been used to help prevent or treat eye disease by doubling as an infection-fighter. Their findings are scheduled for the Jan. 15 issue of ACS' Analytical Chemistry, a semi-monthly journal.
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