Tag: "selects" at biology news

Planned Burning In Forests A Boon To Several Species Of Birds In Illinois

...bird species go down in abundance," hesaid. "Fire selects against those species, but it enhances some otherspecies." Among the species benefiting in Illinois is thered-headedwoodpecker -- whose presence in the Midwest has declined almost 2 percenta year since 1966 -- as well as northern orioles, summer tan...

Bowman Gray Scientists Find Novel Way To Block AIDS Virus

...said, "such anapproach induces toxic side effects, selects for resistant mutants, and isunlikely to completely eliminate HIV-1 from infected individuals." Chen said, "A strategy of genetic modification of host cells, thelymphocytes or stem cells, for resistance to HIV-1 infection, together with drugt...

Researchers Discover How Ulcer Bug Becomes Antibiotic-Resistant

... and use of metronidazole again in later therapies selects for these newly resistant mutant variants." Metronidazole-resistant strains often arise in people who have neverbefore been treated for H. pylori infection but who may have taken metronidazole periodically for other reasons. In many countries...

Whitehead Study Supports Existence Of Ancient RNA World, Helps Provide Insight Into Early Evolution Of Life

...A go through test-tube evolution (a technologythat selects for the fittest molecules and introduces errors in successivegenerations of copies much like in real evolution) to gather further evidence infavor of the RNA world view. They have shown that complex ribozymes are morecommon than previously thought a...

Antibody Revolution Targets STDs, Stomach Viruses, Common Cold

...we force a pathogeninto a unique strategy where it selects for resistant strains But if we starttalking about prevention rather than therapy, we can get these antibodiesdirectly to mucosal surfaces where they can prevent things from ever gettinginto the body and replicating." More than 80 MABs are...

How Nerve Cells Get In Touch - A Molecular Model Of Synapse Formation And Retrograde Signalling In The Brain

... with (2). Once arrived inthe target area, an axon selects its target cell from a large number of possiblecan... In particular, it was unknownhow an arriving axon selects a partner neuron, how pre- and postsynapticproteins are recruited to the initial site of synaptic co...

NSF-Supported New Scientists And Engineers Receive Presidential Award

...erve importantgovernment missions. NSF now selects its PECASE nominees from a pool of its most meritoriousCAREER (Faculty Early Career Development award) winners. The CAREER awardsupports exceptionally promising college and university junior faculty who arecommitted to the integration of research an...

Computers use Darwinian model to 'evolve' fuel additives

...ossible compound, theevolutionary method naturally selects the best-performing additives. "We randomly create hundreds of molecules from these heads and tails at thebeginning," Venkatasubramanian says. The system can then predict how well themolecules will work by evaluating their structures. Only th...

Blind, naked mole-rats not the inbreeders biologists once thought

...ulations go through frequent bottlenecks, and that selects out genes that would contribute to inbreeding depression." A population bottleneck occurs in naked mole-rats when a population becomes really small, and then a disperser pair goes out to start a new colony at a distant site. The mole-rats live in bu...

Researchers decipher chemical 'cross talk' that determines survival of immunecells

...s signal and one produced by a hormone continually selects the T cell soldiers the body needs as it faces a changing cast of invaders. What controls this selection process has long puzzled biologists. The steroid hormone signal is normally present at low levels that fluctuate with daily rhythms, but stress ...

Why proteins spiral

.... "There seems to be a principle by which Nature selects those structures that have as many transitional entryway structures as possible. In other words, secondary motifs like helices seem to give proteins many more options for snapping themselves together, so the folding process should be able to proceed...

Science and Amersham Pharmacia Biotech grand prize: "jumping DNA" discovery explains immune system evolution

... an early stage of their careers. A judging panel selects the Young Scientists grand prize winner and may present regional awards in four geographic regions: North America, Europe, Japan and all other countries. These regional winners receive $5,000 awards. The grand prize recognizes Agrawal's contribution ...

American Society for Microbiology selects Mass Media Fellows

... science issues for a lay audience. Each year ASM selects and sponsors at least one fellow to participate in the program. A native of Spartanburg, SC, Davis earned a B.S. in Biology from Swarthmore College, in 1998. She will complete her Ph.D. in Microbiology in 2003 at the University of Wisconsin, Madis...

UIC biologist awarded cancer research grant

... advisory board comprised of 10 cancer specialists selects Kimmel Scholar Award winners. Recipients are chosen from major not-for-profit cancer centers around the United States. The Philadelphia-based Sidney Kimmel Foundation for Cancer Research funds the award, named after the founder and chairman of Jones...

Nature's chemical weapons save lives

...ogen bonds, etc. by chemical reactions. The group selects naturally occurring organic compounds that exhibit valuable biological and/or therapeutic properties-immunosuppressive, neurotoxic, and anti-cancer-as targets for total synthesis. This objective may require using organic synthesis to elucidate the ...

Research finding could lead to vaccines effective against a range of cancers, UC Berkeley researchers report

...minate some tumors entirely is that it unwittingly selects for cells that express low levels of the protein marker the immune system homes in on. That is, tumor cells expressing high levels of the markers are quickly cleaned out, leaving only cells that slip beneath the radar of natural killer cells, macroph...

U. of Colorado biology professor wins 2001 MacArthur Fellowship

...ndous feeling." The MacArthur Foundation typically selects between 20 and 30 fellows annually "who provide the imagination and fresh ideas that can improve peoples lives and bring about movement on important issues." The MacArthur Program selection committee cited Pace "for revolutionizing our conception of...

NSF invites media to report on U.S.-sponsored Antarctic research (2002-2003 season)

...(early November through mid-January). NSF annually selects a small group of journalists, representing diverse...ative and Public Affairs reviews all proposals and selects finalists. The committee looks for proposals that indicate an understanding of the nature and chall...

Structure reveals details of cells cargo-carriers

... take up from the ER," said Goldberg. "Also, COPII selects the appropriate fusion machinery, to ensure that the vesicle fuses with its correct target, a structure called the Golgi complex." In order to understand the process of vesicle formation and transport in molecular terms, one must begin with the initi...

Bloodworm's way with copper likely provides paradigm for new materials

...ral content. "The question as to why the bloodworm selects copper for its jaws is very puzzling; most other organisms mineralize with calcium phosphate/calcium carbonate," said Waite. "And in all those other calcium-based biting, chewing, fighting structures, the mineral to protein ratio is more like 10 to ...

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