Kaposi's Sarcoma Caused By Virus Usually Transmitted Through Homosexual Sex, According To UCSF Study
...94 men who reported any homosexual activity in the previous five years. In contrast, these antibodies were not found in any of the 195 exclusivelyheterosexual men studied. "By conducting the study in one well-defined population of men observedover a narrow time frame, and by controlling for our subjec...Extra Choline During Pregnancy Enhances Memory In Offspring
...icbrain process that choline enhances. In previous choline studies conducted at Duke, researchers showed thatrats exposed to choline prenatally were better able to learn and remember thelocation of food in a maze, as well as to locate and swim to safety on a hiddenplatform in a water-filled maze. And...Among Wrens, Moms Teach Daughters To Call, Dads Teach Sons, Study Reveals
...breedingpair while up to 12 other birds -- usually previous offspring -- do not breed,but help construct the nest and feed the young. When dominant birds die, helperscompete to take their place as breeders. The UNC-CH student, a behavioral ecologist, investigated about 30 groupsof wrens. Much already ...Eviction From Scum Home Makes Disease-Causing Microbe Vulnerable
... making it more sensitive to antibiotics." In previous work, Iglewski's team has shown that Pseudomonascontrols several genes, including the lasI gene, through amechanism known as quorum sensing, where bacteria release achemical signal known as an autoinducer into shared surroundingsand monitor its level...Human Bone Disorder Reproduced In Mice
...tissueframework that supports blood formation. In previous studies, Dr. Pamela Gehron Robey and colleagues at the NationalInstitute of Dental Research (NIDR) perfected a technique for using stromalcells to grow normal human bone in mice. Stromal cells taken from healthy humandonors were grown in the laborat......owing theheart attack. The researchers acknowledge previous studies that showed that vessel-openingtreatment is better than placebo up to 30 days following the treatment. "Butbeyond 30 days, the survival curves have been consistently parallel (the same)for the following 1 to 5 years indicating no further tre...Gene Study Shows Mammals Lived Before Extinction Of The Dinosaurs
...bout 100 million years ago--much earlier than some previous estimates based onfossil studies, which link the evolutionary event to mass extinctions 65 millionyears ago. "This is the first time we ever have been able to estimate when all theselifeforms appeared on Earth," Hedges says. "Fossils can't give us...Research Into Cockroach Behavior Could Lead To Better Baits
...rket, for example, do not use odors because of the previous assumption that cockroaches could not use smell to find food. Koehler said researchers next will try to determine which odors discriminating cockroaches likes best. So far, beer and bread seem to attract the most roaches, a finding with "implications...New Machine Slashes Time, Cost To Make Unique Lenses
... producing high-precision aspheres than any of the previous techniques,"Pollicove says. A technician can just plunk a piece of glass into the newmachine, plug the desired curvature of the final lens into themachine's computer, and let the of diamonds embedded in its twobronze grinding wheels go to work. ...ACE Gene Linked To High Blood Pressure In Men But Not Women
...lved in heart muscle and blood vesselgrowth. While previous research has found that people who carry a certain geneticvariation of the gene were more likely to have elevations of the enzyme, studieshad failed to link such elevations to heart disease, says Boerwinkle."Despite evidence for a substantial genetic...Press Events At Spring Meeting
...changes pertaining to the meeting itself. Several previous media advisories about Spring Meeting may be accessed on theAGU Web site: http://www.agu.org/sci_soc/media.html . Tuesday, May 26 12:15 PM. 1998: The Year of the Ocean. Press availability. Dr. Bonnie McGregor,Associate Director, U.S. Geologi......remely encouraged by this new data, which confirms previous findings of E1A'sability to downregulate the HER-2/neu oncogene. We remain on track to initiatePhase II studies for E1A in head and neck cancer in the second half of 1998." Targeted Genetics Corporation develops gene and cell therapy products for th...University Of Cincinnati Biologists Find Evidence For Unusual DNA Repair InArchaea
...and the genetics of Sulfolobusacidocaldarius . In previous work, Grogan demonstrated that the microbe can usevisible light to repair DNA damaged by ultraviolet light. Now, he is searching for tools tostudy genetic recombination in Sulfolobus . "Because they are so different, you can't necessarily take expe...New Test May Reduce Need For Some Prostate Cancer Biopsies
... treatment for prostate disease. Because all had a previous record ofPSA levels between four and 10, all had been biopsied. A total of 379 were foundby the test to have prostate cancer, while 394 men did not. Other authors of the study include Patrick C. Walsh and Eric N. P.Subong (Johns Hopkins); Ke...Duke Researchers Finds That Moderate Caffeine Use Boosts Blood Pressure, Potential For Heart Disease
...al stressors and activities," he said. In previous studies conducted over the past 15 years, Lane has shownthat caffeine raises levels of adrenalin, the body's major stress chemical,during everyday work activities, indicating that caffeine made the day morestressful. The question he wanted to answer ......e communication that takes place in the brain, but previous efforts to record them one at a time have been thwarted by their extremely small size. More than a billion vesicles -- the microscopic membrane-bound pouches that carry the chemical signals -- could fit into an average-sized drop of water. "We really...... the treatment of hemophilia B." "Our work extends previous results obtained in mice to a well-defined, naturallyoccurring, large animal model of hemophilia B that is very similar to thedisease in humans," commented Dr. High. "This is the first example of theintramuscular administration of a gene therapy vec...Relatives Of People with Colorectal Polyps Face Increased Risk For Colorectal Cancer
...r thansigmoidoscopy, which is more aggressive than previous recommendations," saysAlfred I. Neugut, M.D., Ph.D...ve with adenoma,rather than colorectal cancer? One previous investigation, the National PolypStudy, found that parents and siblings (first degree relatives) of ...Mouse Model Of Down Syndrome Offers Glimpse Into Role Of Specific Genes In TheDisorder
...to zero inon the role of individual genes. Another previous standard model, Ts65Dn, includes a slightly larger...tified onthe extra segment of chromosome 16 in the previous models. The researchers say it is too early to draw strict parallels between thecognitive deficits i...The Fishing Hole Had Better Be Upstream From Commercial And Industrial Centers
...(paved) areas. He also has the benefit of previous research. McTammany 's advisor,Virginia Tech Biology Professor Fred Benfield, is interested in historic landuse along streams ( www.vt.edu:10021/ur/news/Archives/Aug97/97325.html ). Becauseof Benfield's long-term research, McTammany has been consider...