Tag: "again" at biology news

7,000 feet under the Sea: LSU scientists take geology to great depths

...w while it is beneath the surface and hoists it up again when the underwater mission is complete. While under water, Alvin is self-propelled, cruising to wherever its crew directs, which can be difficult because beyond the reach of the subs lights, it is totally dark under thousands of feet of water, Ahar...

Tipsheet: Journals of the American Society for Microbiology

...ts the possibility that they could convert to once again cause disease. To improve the safety of HIV candidate vaccines, the researchers replaced specific genetic sequences the virus uses for replication with genes from E. coli bacteria, widely used to regulate gene expression in other applications. The...

Atmospheric chemistry key to global and local air pollution

...ompounds remain in the air, changing, and changing again as other chemicals cause reactions. "Pollution from megacities and biomass burning, including precursor gases to hydrogen oxides such as acetone and formaldehyde, lofted into the upper troposphere, can become the dominant hydrogen oxide source and re...

Study sheds new light on Lyme disease transmission

... "We are excited by the findings because this once again supports the concept that arthropod vectors are not just flying or crawling syringes that go around inoculating bacteria. There's a developing biology going on inside this vector. The bacteria population essentially adapts during the transmission pro...

Want to get rid of trash quickly? Just add water, study suggests

... continuously pumped through the bins again via leachate recirculation pipes. While the researchers did not get the decomposition results they had hoped for - the mass in the bin with the sludge layer decr...

ST@T SHEET: A monthly update on science/technology @ Temple University

... initial excavation of the rockshelter in 1973 and again in 1975 and returned to direct new excavations in 1997 with the assistance of fellow Temple faculty member Dr. Patricia Hansell, one of the studys co-authors. The study was also co-authored by Dolores Piperno, a Temple alumna, and Irene Holst, both o...

Lake Titicaca study sheds new light on global climate change

...her 2,500 years of heavy precipitation as the lake again rose to overflow levels. 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 ...

Cancer-linked BRCA2 gene plays previously unsuspected role in cell division

...ress through mitosis at the 12-hour mark. Looking again at 14 hours, the scientists saw that about 90 percent of the experimental cells had moved through mitosis by then. A larger proportion of the neutralized cells continued to lag behind their control counterparts, but this figure did bring the experime...

Cancer's penchant for developing drug resistance is a result of chromosome reassortment, UC Berkeley scientist proposes

... drug resistant sometimes spontaneously revert and again become sensitive to drugs, something expected from the unstable nature of aneuploidy, he said....

Deep Green spawns Deep Gene and Deep Time to continue work toward a complete tree of life for the green plants

... at least eight times within flowering plants, and again when the seed evolved. It appears, from our initial work, that many of the genes involved in seed dessication tolerance are descendents of the early genes that were involved in vegetative dessication tolerance in the first place." These findings emph...

Rat study shows high-fat diet impairs concentration and memory

...e the lever appeared, they were to go and press it again to receive a food reward, and so forth. The interval delay between levers was 5, 10 and 20 seconds (to test short-term memory) and 40 and 80 seconds (to test long-term memory). Those rats on the high-fat diet had difficulty learning the Go/No Go task...

Tips from the journals of the American Society for Microbiology: February 2001

...arly 1990s, but by the end of the decade there was again a noticeable decline in the striped bass population. After closely monitoring the health of the striped bass population, officials discovered that many of the fish suffered from systemic mycobacteriosis. "This was the first time that mycobacter...

Nature mops up

...s occurring it doesn't take long for the system to again reach a contaminated state. "What could happen," says Mike Montgomery of the Naval Research Laboratory, "is that we'd spend millions of taxpayer dollars to dredge the sediments, and end up doing more harm than good. We could create an even worse bui...

Violence and aggression: University of New Orleans researchers offer provocative insights

... untreated, aggression in young children "shows up again and again" throughout adolescence and adulthood. Frick, Director of the Applied Development Program at UNO, has identified several behavioral traits that predict different patterns of violent behavior. Not only does he divide his subjects into ch...

Scientists discover how nerve cells move from target to target as they wire up the developing embryo

...ect was restored - because the receptors were once again able to bind. The series of experiments demonstrate that it is a physical interaction between the receptors that turns attraction off....

Computer model predicts outcome of DNA shuffling

...ss a potentially interesting protein or enzyme are again fragmented and reassembled to form new recombinant genes. The process continues until a protein with the desired qualities is found. "Beginning with genes that produce enzymes that are moderately good detergents, for example, the process itera...

Scientists, ships, aircraft to profile Asian pollution and dust

...a andMongolia last spring. This year's plumes have again begun theireastward journey toward heavily populated Asian cities and thenorthwest Pacific Ocean. Awaiting their arrival will be 130scientists from nine countries, along with two research vessels, fourresearch aircraft, a half dozen satellites, and e...

Researchers pioneer techniques to lubricate microdevices

...reely. When the researchers again nudged the rotor into motion, they found that the solid Z-DOL coating reduced friction by half. These results will appear in detail in one of Bhushan's two Journal of Vacuum Science an...

University of Florida researchers identify a protein that may induce drug resistance in lung cancer cells

...o stop or correct the process and help the patient again respond to therapy. Lung cancer is the most common cancer-related cause of death, according to the American Lung Association. An estimated 164,100 new cases were diagnosed in the United States last year alone. Meanwhile, more than 150,000 lung can...

Vitamin-like substance leads to dramatic improvements in patients with muscular disorder

...hers report. Once wheelchair-bound patients walked again with some assistance, and a woman was able to work outside her home for the first time. The research, published in the April issue of the journal Neurology, was led by Dr. Salvatore DiMauro, M.D., Lucy G. Moses Professor of Neurology at Columbia Univ...

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