Bacterial Toxin Surprises Scientists
...timulated the protein to open or close. By adding strepavidin--which binds strongly to biotin--to one side of the membrane, they were able to determine whether the biotin-labeled residue was on the cis ("outside") or trans ("inside") of the membrane....Key to Triplet Repeat Brain Diseases Open Door For New Way To Understand, Treat Genetic Diseases"
.... In other words, the abnormalrepeat in the DNA is adding a "docking area" domain in the protein,which allowed substances that bind loosely to the normal protein to stickmore tightly to the enlarged disease protein. To test that theory, the Duke team made artificial strings of glutamines,either 20 glutami...Transgenic Rice Plants Resist Insects, Drought And Salt Damage
...reater insect resistance can be easily achieved by adding genes that cause the plant to produce the Bt (Bacillus thuringiensis) toxin, Wu said. Anticipating potential objections to the genetically engineered rice plants, Wu said that the potato proteinase inhibitor has no effect on humans, and it is presen...Asian Beetle, New In This Country, Threatens Brooklyn's Shade Trees
... to curb the Greenpoint infestation, Hoebeke said, adding that there are no known natural predators. For back-up species confirmation, Hoebeke sent specimens to the Carnegie Museum of Natural History, Pittsburgh, which verified the species on Tuesday. Hoebeke also has sent some of the Cornell samples to th...End Of World Population Growth Projected For 21st Century
...s that currentlyin Western Europe," explains Lutz, adding that to avoid serious problems inits pension system, China must take immediate and intensive actions. "The Future Population of the World: What Can We Assume Today?",edited by Wolfgang Lutz, is published by Earthscan (ISBN 1 85383 349 5)....Bottom-up Ecological Processes Better For Clear Waters, Study Finds
...ht papers from 11experiments testing the impact of adding fish versus nutrients to food websand comparing them with controls. Overall, adding small fish, such as minnows,to the top of the small food webs in the studies caused a 75 percent dec......natural resources science agency,"Eaton said. "By adding the special science capabilities of the formerNational Biological Service and the mineral information function of theformer Bureau of Mines, we have taken on some exciting newresponsibilities. With these responsibilities has come the opportunity to...Project Shows Native Bacteria Can Destroy Widespread Pollutant In Groundwater
...t taste and smell. "Using toluene is a little like adding chlorine to drinking water to kill bacteria. Chlorine is poisonous at a high enough concentration so you don't like to add it except when there is a significant benefit. We've tried a number of other compounds, but none of them is as effective as tol...Munching Microbes Make A Meal Out Of Toxic Substances
...rculation system, which involves digging wells and adding oxygen, either by dissolving oxygen in the water, ...mple, out west the soil is very alkaline, and just adding any petroleum degrader to the soil isn't going to be effective because some can't survive in those c...Houseflies May Transmit Ulcer Bug
...tures and pads that secrete a stickymaterial, thus adding to its pathogen transmission potential. It istherefore not surprising that as many as six million bacteria have beenfound on the exterior surface of a single feeding fly and more than 100species of pathogenic organisms have been isolated from the di...Natural Shelters on Leaves House Plant Bodyguards
...s early in the season. The researchers also tried adding the simulated domatia to field cottonin the middle of the growing season. In those plants, levels of spider mitesremained below the pest status. However, the addition of the domatia atthat time appeared to have the biggest effect on populations of th...Female Adolescents Need Calcium During 'Window Of Opportunity'
...s expected to get worse. Weaver's study found that adding more calcium to the diet works, up to a point. "The bone mass keeps increasing along with the increasing calcium intake until it reaches a certain point, and then it plateaus. Any calcium intake above that doesn't really do you any good," Weaver says...Vitamin C Deficit Linked To Skin Disease
... In earlier experiments the researchers found that adding vitamin C to culturesof chicken liver cells prevented the light-sensitive porphyrins fromaccumulating in the cells. In other studies in a special strain of rat which,like humans, gets vitamin C from dietary sources, the investigators found thatnormal...Roadsides Benefit From Waste, UF Researchers Say
...cult for grass to grow well. Importing topsoil and adding commercial fertilizer helps but is prohibitively e...looks promising is welcome. "Importing topsoil and adding fertilizer is very costly, so this alternative will be a big help," Henry said. "This will save mone...Female Fireflies Lure Males For Defense Chemical
... spiders and even predatory bats, they speculated, adding that the chemical also protects firefly eggs. "This strategy -- acquiring ready-made defensive chemicals from other organisms -- turns out to be quite common in nature," Eisner commented. "The more we study insects, the more we find them taking chem...Folic Acid Fortification Effective In Cereal Grains
...l below thePHS recommendation." Another benefit of adding folic acid to cereal grain products, according to the study's seniorinvestigator, is the possibility of reducing homocysteine concentrations in the blood of individuals,which could lessen their risk for several forms of heart disease. The 14 study su...Peutz-Jeghers Disease Gene Identified: Enzyme Loss Causes Polyps And Cancer
...s of certain cytosolic proteins (substrates) by adding phosphate groups to the side chains of serine, threonine or tyrosine residues. Kinases have highly diverse functions and are implicated in cell cycle regulation, growth control and signal transduction. The molecular mechanism by which STK...New Gene Alteration Find Points To Aggressive Leukemia Treatment
...ted quickly and aggressively,” Caligiurisaid, adding that patients with the defect probably should undergo an allogenicbone marrow transplant while in their first remission of the disease ifthat option is a possibility. The researchers are now beginning a larger, more comprehensive prospectivestu...Good Ergonomics Is Good Economics
...nd members of Congress sometimes view us as simply adding an additional expense burden and, thus, increasing...search programs that demonstrated the potential of adding a CHML to reduce response times of following drivers and, thus, avoid accidents. In the mid-1970s, t...Fauci: New Findings Help Explain "Rebound" Of HIV In Patients Who Discontinue Triple-Drug Therapy
...s of experiments, the researchers found that after adding HAART to cultures of latently infected, resting CD4+ T cells, they were unable to induce with cytokines the production of HIV from the cells of either group of patients. "However, when we took HAART out of the ...