Cholesterol Anchor Helps Signaling Proteins Direct Development
...this may be because lack of cholesterol interferes with the production of hedgehog protein or with the way it spreads through tissues. "While I do not suggest that expectant mothers switch to a high...Researchers Find Genetic Clues To Intestinal Disease
... co-worker, Steven Brant, M.D., toencourage people with a family history of Crohn's disease to participate... for each patient." Crohn's disease can be treated with medication, but two-thirds of people affected need surgery, usually because of a blockage in the int...Gene Discovery Could Overcome Aluminum Barrier To Higher Wheat Yields Worldwide
...-8324] USDA scientists developed a soybean strain with both high yields and high protein levels. This is a first in soybean breeding and will overcome the problem of decreasing protein levels as seed yield increases. [Contact: Richard F. Wilson, <a href="http://sun.ars-grin.gov/ars/SoAtlantic/Raleig...Six-Year Drilling Project to Uncover One Million Years of Earth History
...logy at the University of Hawaii, in collaboration with the University of California at Berkeley and the California Institute of Technology. "Researchers from more than two dozen universities around the world will be involved in the project, which will study formation of volcanoes and the mechanis...'Juliet' Evades Primate Center Expedition
... considered perhaps themost beautiful of primates, with fur of yellow, orange, gray, white andblack. Rome...three years ago, they found a heavilylogged forest with no lemurs in sight. The capture effort will continue, said Glander, with expedition member CharlieW...Behemoth Animals May Follow Same Extinction Patterns
...egodons and elephants -- arenot quite extinct, but with only two species left, they are far reducedfrom their heyday. The African and Indian elephants are the remnant of what,at its height during the late Miocene, was a group of some 30 types of animalsroaming the Earth. "Interestingly, at their height,...Changing Continental Runoff Patterns Could Change Ocean Circulation
...In today's oceans, deep water forms near the poles with cold water sinking and then traveling toward the ...renheit warmer than it is today," says Bice. "And with this warmer water globally, we believe that there were deep water formation sites in the subtropic...NCAR Scientist Models Earth's Climate and Vegetation Patterns At Last Glacial Peak
...ted by massive ice sheets over Canada and Eurasia, with tundra covering much of Europe and North America a... whole world was colder in both summer and winter, with a global average temperature four degrees Celsius lower than now and atmospheric carbon dioxide (a g...NCAR Scientists Trek To Africa For Biosphere-Atmosphere Chemistry Study
...ydrocarbons and oxides of nitrogen, which interact with sunlight to produce ozone and other smoglike produ... is collecting chemical data at these sites--along with meteorological data throughout the study area--to explore how the vegetation and fires interact with...North America Hit Hard By Asteroid Strike In Yucatan 65 Million Years Ago
...west. The oblique angle of the asteroid's contact with Earth coupled its impactenergy with that of the atmosphere and planetary surface to send waves ofground-hugging, vaporous fireballs onwa...An Equal Opportunity Extinction? Cincinnati Geologists Find Global Impact from Permian Die
...n was global in itsextent and hit all marine areas with roughly the same effect. Traditionally, geologists...inction, but this restricts the cause to something with aglobally consistent mechanism. It's a really exciting finding." Ebersole said his results are simil......raminifera or forams, microscopic marine creatures with shells of calcium carbonate, are best known from t... millions of dollars of damage. Cohen, who works with the Energy and Resources Group at UC Berkeley, has previously reported the introduction of more than...Northwestern Scientists Discover How Herpes Simplex Virus Infects Cells
...how recurrent herpeticdisease can occur in persons with normal immune systems and will lead todevelopment ... infections innerve cells and persist indefinitely with periodic reactivation of thevirus. Consequences of viral replication include cold sores and feverbli...Antarctic Science Season Gears Up With Searches for Meteorites, Neutrinos, and New Life Forms
... Southern Ocean to trace carbon cycling associated with plankton blooms; drilling to assess the stability ...uises will center mainly on the Ross Sea, starting with a cruise embarking in early October to study Antarctica's largest and most predictable spring bloom ...Scientists Identify Retrovirus-Like Components In Corn Genome
...ent classes of retrotransposons within the region, with each class having 10 to 30,000 copies of its DNA s...uch a way as to cause mutations, you could wind up with more than 30,000 mutations per individual plant, and a dead host." Instead, the retrotransposons ins...Scientists Trek to Africa for Biosphere-Atmosphere Chemistry Study
...entral Africa has on these cycles." Africa with its vast expanse of land near the equator, exerts ...ydrocarbons and oxides of nitrogen, which interact with sunlight to produce ozone and other smoglike products -- often at levels approaching those of a high...... The results showed that postmenopausal women born with the slow-acting gene for N-acetyltransferase...e risk of developing breast cancer than women born with the fast-acting gene. The risk was highest for women who began smoking before the age of 18. ...Animal Studies Indicate Aging Brain Responsive To Estrogen
...n show more connections in a brain area associated with memoryformation than did similar untreated rats. T...lzheimer's Association. Although they are working with aging rats, their findings may have implicationsfor the many post-menopausal women now on estrogen r...... to restore neural growth or function. One problem with studying neural regeneration in vertebrate systems...lia around the area of injury, while those treated with the inhibitor showed a scattered distribution of microglia, spread well beyond the site of injury. S...... during mental activity. By linking an MRI scanner with the <A HREF="http://www.psc.edu/machines/cray...periment). In the past, computing couldn't keep up with the data, and it took 24 hours or more to produce a usable image. To deal with this bottleneck, the ...