Tag: "first" at biology news

End Of World Population Growth Projected For 21st Century

...the next century, if ever. The projections are the first fullyprobabilistic ones ever released and reflect the impact of alternativeassumptions for birth rates, migration and death rates. Based on expertopinions, the projections include confidence levels for global populations andgo up to the year 2100. Th...

Newly Discovered Gene Halts Cell Division and May Have Cancer Link

...ettering and the study's lead author. MAD2 is the first human gene to be identified that serves as a checkpoint for cells to progress into the final stages of cell division. Until now, the only other checkpoint gene to be discovered was p53, which allows a cell to copy its DNA at an earlier phase in the c...

Cholesterol Anchor Helps Signaling Proteins Direct Development

...says Jeff Porter, Ph.D., a postdoctoral fellow and first author of the paper. "After spending two years searching for what we thought might be a new molecule, this was like finding out Santa Claus is your dad--hard to believe at first, but after reviewing the data it makes a lot of sense." The new results ...

Researchers Find Genetic Clues To Intestinal Disease

...e might be several distinct disorders, this is the first large study of a group of families that confirms t...ntis called genetic anticipation. The study is the first to show genetic anticipation in a disorder caused by multiple genes, according to Bayless. The Hopki...

Gene Discovery Could Overcome Aluminum Barrier To Higher Wheat Yields Worldwide

...th high yields and high protein levels. This is a first in soybean breeding and will overcome the problem of decreasing protein levels as seed yield increases. [Contact: Richard F. Wilson, <a href="http://sun.ars-grin.gov/ars/SoAtlantic/Raleigh/snfr/">Soybean and Nitrogen Fixation Research Laborat...

North America Hit Hard By Asteroid Strike In Yucatan 65 Million Years Ago

...theiroblique-impact hypothesis. North America, the first region to experience thefireball, had the most severe extinctions of plants. After the devastation, ferns dominated the flora of central North America.Ferns accounted for 70 to 100 percent of the spore- or pollen-producing plantsin the region after ...

UC Berkeley, U.S.G.S. Scientists Discover Microscopic Invader Of San Francisco Bay, The First Known Marine Microbe Invader Of U.S. Waters

...ry's rivers and estuaries, scientists have for the first time documented the invasion into U. S. coastal wa... presence in San Francisco Bay is probably not the first time one of these tiny organisms has traveled around the world, the scientists say. It is likely tha...

Northwestern Scientists Discover How Herpes Simplex Virus Infects Cells

...e immunesystem. This human protein is not only the first "portal of entry" forherpes simplex virus to be identified, but is also a previously unknownmember of an important family of cell surface molecules known as the TNF/NGFreceptor family. The normal function of these receptors is to receivesignals requi...

Antarctic Science Season Gears Up With Searches for Meteorites, Neutrinos, and New Life Forms

...ome provocative results. From a sample during the first nine months of observations, AMANDA has spotted about 12 particles that seem to be evidence of incoming neutrinos. This season, hot-water drillers will bore out holes to install seven new strings of detectors 2,000 meters deep, to join the four stri...

Genetic Makeup May Explain Why Some Women Smokers Develop Breast Cancer While Others Don't, UB Study in JAMA Reports

...tute have found. Results of their study, the first to consider genetic variability as a factor in a person's breast-cancer susceptibility to the carcinogens in cigarette smoke, will be published in the Nov. 13 issue of the Journal of the American Medical Association. The results showed that ...

Impact of Meteorites, Drop in Sea Level Caused Mass Extinctions 65 Million Years Ago

...res with shells called ammonites. "For the first time, we can estimate the relative importance of all the major factors that led to the extinction of the ammonites," says Marshall. The impact of the asteroid or comet accounts for 50 to 75 percent of the ammonite extinctions, which is a much higher...

Duke's Russian Laser Making Ultraviolet Light And Gamma Rays

...am began producing gamma raystwo nights after they first manufactured ultraviolet laser light. The research...rfulthan X-rays. Preliminary results show that the first OK-4 gamma rays measuredenergies of about 12 million electron volts. Such energetic gammas could he...

Recruiting Mole-Rats

...outh for all to smell. "The scouts rarely ate that first sample of food, although they sometimes had to struggle to keep it away from other mole-rats," Sherman said. "Usually, the scout dropped the sample in the corner of the nest chamber without consuming it." The chirp-and-wave recruitment maneuver set ...

Sea Turtles Have Favorite Oceanic Routes

...hat was enough time to provide the researchers the first record of the turtles' preferred path. Efforts to save the leatherback turtle -- an endangered species -- have focused on their nesting areas and, hence, nesting females. Morreale said scientists have very little information on the males or the young...

Plants Have Future As Environmental Clean-Up Agents

...ods could have cost an estimated $4 million in the first year,and $8 million over 20 years. The total cost of the bioremediation isexpected to be around $15,000. But the aesthetic qualities of bioremediation were also anattraction. Feyerharm said the planting of the trees will helpcontrol erosion problems...

Bacterial Protein Structure Hints At Mechanism Of A Class Of Premature Aging Diseases

... Duke UniversityMedical Center have determined the first step in understanding how a newclass of genetic fl...gn as would gene therapies. The newresearch is the first step in that direction. The Duke researchers have shown that the RTP, rather than simply actin...

Two Long-sought Diabetes Gene Found

...oint the precise gene. This landmark paper was the first time genetic techniques had been used to determine...nd HNF-4-alpha are members of a regulatory pathway first identified in cells of the liver but present in other cells including those of the kidney and intest...

No Such Luck: Nitrogen From Air Pollution Unlikely to Moderate Global Warming

... "From a global change perspective, this is the first long-term field experiment to demonstrate the tight linkages between nitrogen deposition, carbon dynamics, and plant species composition in grasslands," says Scott Collins, director of the National Science Foundation's Long-Term Ecological Research P...

Siblicide In Nature: Study Of Galapagos Seabird Finds Death Can Ensure Species Survival

...ling mockingbirds. The question for Anderson, who first began examining siblicide in 1984 among the boobie...ed booby parents seem to be collaborating with the first chick to get rid of the second chick," Anderson said. Moreover, work by Andrea Schwandt, a Wake For...

Fast Measurement Technique Reveals Early Steps In Protein Folding

...." Understanding how proteins fold is a necessary first step toward the eventualgoal of tailoring designed... twodistinct phases in the folding process. In the first phase, which lastsseveral hundred nanoseconds, the amino acids quickly curl into helixes --the funda...

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