Bottom-up Ecological Processes Better For Clear Waters, Study Finds
... its detractors. The trophiccascade hypothesis was sharply criticized several years ago as being "unsoundlybased on many half-truths and much hand-waving and overextrapolation ofthe data," according to a 1992 paper in the journal Limnology and Oceanographyby Rita DeMelo and colleagues. DeMelo used a statis...Biologists Get First Look At DNA-Protein Binding Structure In An Archaeon
...ing. The protein kinks the DNA so that the DNA is sharply bent and stabilized." To get this new view, the researchers formed a single crystal of the proteinwith pieces of DNA from the archaeons Sulfolobus acidocaldarius and S.solfataricus. After freezing the crystal with liquid nitrogen at minus 150degrees...Mr. Ples Throws Scientists Into A Tizzy
...ion years ago, however. So did brain size increase sharply in someaustralopithecines and gradually enlarge in their descendants to its presentsize of at least 1200 cc -- the capacity of a Harley Davidson engine?" Although the new study provides more questions than answers, it pointsto three important...... cancer who have mutations in either gene havethis sharply elevated risk, which was previously associated only with BRCA1. Most women with breast cancer are not at a significantly increased risk ofovarian cancer, and so the possibility of this disease does not factor intotheir health care. This study suggest...Common Anti-Viral Medication Prevents Severe Eye Herpes
...reduces the numberof recurrences." The drug also sharply reduced the recurrence of less serious forms of the herpeseye disease, the study found. Acyclovir reduced by 41 percent the chance thatany form of the eye herpes virus would recur in patients who had the infectionduring the previous year. In both st...Bat Sonar Sharper Than Thought; Much Better Than Man-Made Gear
...ain can resolve sonar images up to threetimes more sharply than biologists had previously thought and much betterthan man-made equipment. The findings, described in the current issue of thejournal Proceedings of the National Academy of Sciences, may lead to improvedsonar for naval and other...Rapid Population Growth Is Still A Problem
... -- Current trends in reproductive behavior differ sharply between regionsand should not be confused, says Population Council vice president JohnBongaarts. "In the already crowded developing world, despite plummetingfertility rates, both the number of births and population size will keepgrowing. The expect...Gene Therapy Incorporates Molecular Rheostat For Controlled, Long-Term Drug Delivery
...ys in the amount of drug in the blood, which rises sharply afteradministration and then declines steadily until the next dose. Side effects areoften most severe during peaks and then drop to levels that may not providetherapeutic benefit during valleys. "One of the real advantages of using gene th......rowing straight past the muscle instead of turning sharply toward it. When he cloned the genes underlying stop short and bypass, Van Vactorexpected the genes would operate in different contexts. But once he analyzedthem a puzzle fell into place, and the genes turned out to belong to the samepathway. ...NSF-Funded Researcher Plucks Four Unknown Fish Species From Antarctic Waters
...ypically are no more than 500 meters deep, differs sharply from similar, moretemperate waters, such as in the Delaware Bay. In those waters, Eastman noted,there is a great diversity of species on the bottom and at different levels ofthe water column. In Antarctica, 95 species of notothenioids, all derived ......urements from the A. garhi fossils that they say sharply distinguishthe new species from A. africanus and from the other hominid speciesknown to be alive around the same time, including two robust species thateventually died out. If anything, said White, A. garhi 's big teeth andprojecting face best res......r controlled trials, a vastnew source of AAT, at a sharply reduced price, potentially would be available totreat the estimated 100,000 Americans who have a deficiency of the protectiveprotein that helps to keep lung inflammation and damage in check. Such a new supply is critical: Currently, only a limited am...Scientists suggest genetic shutdown links estrogen, heart disease
...n may not be the only reason heart diseasein women sharply increases after menopause, a new study by Johns Hopkinsresearchers suggests. A large-scale genetic event that quietly blocks arteries'ability to respond to estrogen may also be at work. "Our findings could account for the perplexing results...Is red wine just as heart-healthy without the alcohol?
...er an 8-hour period. Catechin concentrations rose sharply in both groups through the third hour after ingestion of the beverage, but persisted for significantly less time (an average of 22%) in those who drank the alcoholic beverage. These results could mean that the alcohol caused the catechin to be eithe...Possible cause and treatment for shock uncovered by UC San Diego bioengineers
...in. "Our theory is that when blood pressure falls sharply in the intestine, pancreatic enzymes in the intestine start to escape from the lumen of the intestine (where they digest food), into the wall of the intestine (where they don't belong). These enzymes produce and release dangerous activators into the...Success of introduced Argentine ants tied to reduced genetic variation
...p these insects in check and in smaller, much more sharply defined colonies than those in California. "When we did our field work in Argentina, it was surprisingly difficult to find Argentine ants, compared to our experience in California," says Ted J. Case, a professor of biology at UCSD who headed the re...Bt corn variety found to be safe to Illinois butterfly
...ings of the National Academy of Science -- differs sharply from a May 1999 Nature report in which Cornell University researchers, citing laboratory tests, reported that genetically modified Bt corn slowed the growth and led to early deaths of Monarch caterpillars. Black swallowtail larvae, the UI researcher...Cloned pig debuts in Science, sets the stage for organ transplants
...ain of black pigs, has a black coat that contrasts sharply with the white coat of her surrogate mother. To confirm that Xena was a clone, however, the researchers compared the genetic "fingerprints" of Xena, the surrogate, and the donor cell line. Xena shares the genome of the donor cell line, and not the ge...Mother nature cleans up human-made mess
...hey found that the phosphorus levels have declined sharply since 1972, which is in keeping with the decreased population of the military base. They also noted that certain species of algae thrived when there were high concentrations of phosphorus in the lake due to sewage dumping. The researchers examined s...Lake Titicaca study sheds new light on global climate change
... Then, about 8,500 years ago, the lake level fell sharply as the Altiplano again became dry. But heavy precipitation would return for another 1,000 years, only to be followed by an extremely dry period between 6,000 and 5,000 years ago, during which Titicaca fell some 250 feet below its present-day level - ...