Duke Researchers Discover Central Role Of Nitric Oxide In Hemoglobin Action
..."a classic allosteric protein" becauseits function depends on whether or not oxygen is bound to it,Stamler said.Now, the Duke researchers said, NO is also involved in the allosteric transitionof hemoglobin....Dangerous Chemical Combination Presents Possible Scenario For Gulf War Illnesses
...also suggested that the severity of clinical signs depends on howactive a particular blood enzyme is in removing the foreign chemicals fromthe body, the researchers said. This "scavenger" enzyme, calledplasma butyrylcholinesterase (BuChE), inactivates foreign chemicals suchas DEET and permethrin. However, ...Duke Researchers Find Second Gene Linked To Blood Vessel Disorder
...yed inside the cell. Thecellular response to TGF-_ depends on the cell type. In some cells, it stimulatesgrowth, while in others it is actually a growth inhibitor. For example,TGF-_ stimulates skin cells to divide, making TGF-_ an excellent wound-healer. In earlier research, reported in the December 1994 i...Duke Ecologist Says Logging Is Creating 'Mahogany Deserts'
...ne inthe Southeastern United States is similar. It depends on fire. It has co-evolvedwith fire." While such a stark survival strategy dooms most mahogany seeds to fail,not many successes are needed to carry on a species that may live and reproducefor 500 years or more, she added. But logging practices at od...Plants Have Future As Environmental Clean-Up Agents
...nds per acre a dayremoved," Davis said. "It really depends on what's present there." In either case, using plant-based bioremediation is cheaper thenmore traditional methods of clean-up such as pumping and treating orexcavation, according to Larry Erickson, professor of chemicalengineering. "I would say so...Isle Royale Moose Continue Decline
... moose herd in the foreseeable future. "Everything depends on the wolves now," says Peterson. "There are so few moose that if wolves are able to continue increasing, they should be able to keep moose at a relatively low level. While the Isle Royale moose have had their problems in the past couple of years, t...Genetic Trickery Offers New Way to Target HIV
...tent on the process. To replicate itself, HIV depends on a molecule known as atRNA primer to attach to a strand of HIV's genetic template,providing a foothold so that the enzyme reverse transcriptase can copy the viral genetic code. Initiating the copying process atprecisely the right spot is the primer......esticides. Wheat production, for example, depends heavily on pest-resistantvarieties developed by state agricultural experiment stations and the USDA-ARS. In 1996, it accounted for the largest acreage of crops (76 million) in the U.S.and more than 550 varieties. "In the U.S., wheat varietie...Coming Extinction Of One Of UK's Most Minuscule Plants Yields Information On Climate Change
...an annual and its abundance from year to year thus depends on the quality of the seed bank in the soil. It appears to have very specific ecological requirements and grows on open basalt gravel terraces where there is little competition from other species. It is a small member of the Dock family with large s...A New Biochemical Link Established Between Stress, Sex And Dominance
...interesting new thing we have found is that stress depends not only on the social state of the individual male but also on the stability of the community," Fernald said. Fernald is the Benjamin Scott Crocker Professor of Human Biology and director of the Human Biology program at Stanford. He is also a pro...Competitive Inhibition May Enhance Safety Of Minimally Processed Fruits And Vegetables
...s. "Whether these pathogens grow and cause disease depends on the type of product,conditions of storage (time...or addedto foods. The type of metabolite produced depends on the type of LAB in foodsand their metabolic response to them. "Biocontrol cultures will likely be...First Selenium-Based Orally-Active Antihypertensive May Lead To New Family Of Therapeutic Agents
...What is exciting is that their biochemicalactivity depends on selenium." Researchers From Mercer UniversityCollaborate on Studies To develop a better understanding of the compounds' potential value,May's research group collaborated with Dr. Stanley H. Pollock, aprofessor in the School ofPharmacy at Mer...Microsurgery Made More Accurate With Virtual Measuring Tool
...rated. As explained elsewhere [Rastogi 1995], this depends on the ability to measure the equivalent camera separation, convergence angle, and focal lengths. Secondly, it is necessary for the human operator to be capable of aligning the 3D pointer with points of interest in the stereo video image at acceptabl..."Genes, Vitamins, Homocyst(e)ine And Cardiovascular Diseases"
...blood homocyst(e)ine by folic acid supplementation depends in parton the individual's genetic background (shown in Figure 4). Much is known on potential mechanisms on how homocyst(e)ine damagesarteries and favors thrombosis, as well as on the fact that elevated levels ofhomocyst(e)ine are usually co......f blood homocysteine by folic acid supplementation depends inpart on the individual's genetic background." Note to reporters: fact sheets about each of the four presentations areavailable. Contact: American Heart Association News Media Relations at214-706-1340....Cancer Cells Self-Destruct When "Sweet Tooth" Is Thwarted
.... "The brain is the only important organ that depends on glucose, so we needa drug that cuts off tumor cells' ability to get glucose but does not cross over into thebrain," says Dang. "It might even be possible to alter 2-deoxyglucose so it behaves in this manner." Dang and colleagues plan to begin...Recovery From Mass Extinction Is Unexpectedly Diverse
...en thought that the degree of invasion of a region depends on how heavilydisturbed that region has been, ecologically. "My results show that it's not that simple. After the K/T extinction, regionswith what appeared to be similar extinction intensities had very differentinvasion susceptibilities. Understandin...... Successful infertility treatment depends on the ability to manipulate precisely the essential hormones involved, which requires their clear identification. Infertility specialists strive for a single birth, considering anything more than twins...Chromosomal Abnormalities Key For Prediting Leukemia Outcome
...ey also show that whetherpatients are cured or not depends on the type of leukemia they have as determinedby cytogenetics and on the type of treatment they receive. “It’s important to remember that these patients were treatedbetween 1980 and 1982,” said Bloomfield. “The treatment r......e to further decline. "Successful breeding depends on having large, intact colonies," said Dr.Sara Schweitzer, a wildlife ecologist in UGA's Warnell School of ForestResources. "The few remaining beach colonies have the absolute last tatters ofusable beach, and they're being flooded out. So these arti...