Study Associates Asteroid Or Comet Impact With Extinctions In Argentina
...ss had puzzled scientists since it was first described in 1865. [Editors: Acolor image of the escoria is available at the News Bureau's web site.] The glass and surrounding red-baked powder bear the signatures of apowerful ancient blast archived in the thick Argentine dust, say the res......the University ofGeorgia have, for the first time, described the shape of two important yeastproteins that make such transport possible in eukaryotic cells -- those withwell-defined nuclei. "The goal of our laboratory is to understand the structural basis ofdocking and fusion at the molecular level," s...Professor Authors Complete Guide To Fungi
...dler turned to icehockey. Finally, the professor described how a woman at a faculty party found herselffalling through an upstairs bathroom floor, only seconds after the floor joistsgave way: Fungi in the moist bathroom had hastened the joists' demise. Soon after the stirring introductory lecture, Hudler f...Virginia Tech Fisheries Professor Works To Conserve Mussels
...enter, where he talked about his research. He also described the U.S.Geological Survey's efforts to conserve species through closed-systemaquaculture of juveniles and the identification of suitable habitat toreestablish populations. China has indicated interest in species conservation and has requested......oplasty.Gene therapy to create natural bypasses is described in research published this year in Circulation: Jo...an Heart Association's meeting in 1997, scientists described very preliminary research findings that unlocked the door to using gene therapy for heart disease," ...BNL Scientists Report On A Natural Cleanup Solution For Polluted Soil & Incinerator Ash
... naturally occurringsoil bacteria and sunlight, is described in the current edition of EnvironmentalScience & Technology by two scientists from BNL's Department of Applied Science.It extracts metal contaminants from soil and wastes and then converts them to aconcentrated and stable form. The researcher...Experimental Therapy Makes HIV-Infected Cells Commit Suicide
...ferent HIV strains," Dowdy says. His group described its success in getting large proteins into cells in the December issue of Nature Medicine. Although scientists previously had demonstrated that the protein transduction motif could be used for this purpose, they were unable to introduce sufficient am...Flexible Membranes - Moving Through The Twilight Zone Between The Nano- And The Microworld
... is well understood in terms of smooth surfaces as described bydifferential geometry. In this way, one can explain the many different shapesand topologies as observed in the optical microscope. On the other hand, ourview about the membranes on the nanometer scale comes from computer simulationsin which one stu...Successful Hemophilia B Gene Therapy In Dogs May Justify Human Experiments
...mophilia B. Brinkhous and colleagues discoveredand described factor XIII in the 1940s, developed the widely used partialthromboplastin time (PTT) test for detecting blood clotting disorders anddeveloped a clotting factor concentrate, which was the first effective treatmentfor hemophilias. The team plan...New Accident Record Analysis Shows Deer Mishaps Climbing
... damage and no injury." In 1994, police described about 8,000 automobile accidents involvingdeer, sa...th computer analyst EricRodgman. In 1997, officers described 11,129. Complete records for last year arenot available. Some N.C. counties, especially ...New Model For Assessing The State Of The Environment
...s,coasts and seas and contaminated sites. They are described in six reports published by Swedish EPA. In the spring, the environmental quality criteria will also be available on the Swedish EPA web site: http://www.environ.se The assessment is in two parts: First, an appraisal is made of the state of the ....... Using his hand-held, color-coded model, Schulten described how the componentsfit inside the ring: 24 chlorophylls (which make plants green); eightcarotenoids (which make tomatoes red); and eight independent peptide units. They all collect and arrange into a protein membrane and feed energy into thebacterium...Human Neural Stem Cells Advance Distant Prospect Of Reseeding Damaged Brain
...allregions of the adult human brain. And two teams described the cloning of humanembryonic stem cells that can generate cells of all tissue types, fueling theintertwined debates about the ethics of human cloning and fetal tissue research. Earlier work in the field from a small group of laboratories inc...Experimental Antibiotic Promptly Kills Drug-Resistant Bacteria In Studies
... that of the old drug." In November, the model was described in two papers in the journal Antimicrobial Agents and Chemotherapy....Programmable Cells Open Window Of Opportunity For Gene Therapy
...genes in the cell are available for expression. He described this process is"naturally expressive," because it readies a select subset of genes from thegenome for expression. The fate of the cell, then, is determined by therepertoire of these readied, or "potentiated" genes. Dr. Krawetz's main task was to dete...Fly Tumor Points Way To New Understanding Of Cancer Development
...ies. In another set of experiments, which were described in a second paper inthe February 1999 issue of Nature Genetics , Xu's team disrupted the LATS1 gene in mice. The scientists found that mice developed ovariantumors, soft-tissue sarcomas and pituitary disorders. "This finding is important because ...New Method For Destroying Potentially Deadly Toxins In Drinking Water
...itanium dioxide and light todestroy the toxins, is described in the Jan. 26 web edition of the journalEnvironmental Science & Technology, a peer-reviewed publication of theAmerican Chemical Society, the world's largest scientific society. The researcharticle is scheduled to appear in the March 1 print issue o...Technique Measures Muscle Contraction At Molecular Level
... change by using simple geometry." The researchers described their measurement technique and the changes that occurwithin the myosin head inthe Dec. 22 issue of the Proceedings of the National Academy of Sciences....UD Valentine Science: Cell "Dating" Habits May Promise Healthier Hearts
... formingcouples--a widely used technique, which he described in the Journal ofBiological Chemistry (Feb. 21, 1997, vol. 272, no. 8, pp. 4651-5654)."When one or two yeast colonies change colors," he explains, "I know that theyare interacting." A series of subsequent experiments can then pinpoint the trueinter...