Tag: "sustain" at biology news

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

...n known ribozymes innature, nowhere near enough to sustain the range of reactions in an RNA world. Further, compared to protein enzymes, ribozymes seemed slow as catalysts. Soscientists set out to make artificial ribozymes that were more versatile andefficient than the natural ones. If they could create su...

Killer Whales Have Begun Preying On Sea Otters, Causing Disruption Of Coastal Ecosystems In Western Alaska

...nges in the kinds and amounts of fish available to sustain populations ofseals and sea lions. The role of killer whales in the sea otter decline is supported by several linesof evidence, Estes said. First is the sudden increase in observed attacks. Acareful statistical analysis found it extremely unlikely th...

Clues To Transplant Tolerance Linked To Infectious Disease Immunity Cell Traffic Key, Say Authors In New England Journal of Medicine

...status of clonal exhaustion. Finally, in order to sustain acceptance ofthe transplanted organ, the donor organ must remain nearly depleted of its donorimmune system cells, which are replaced with like-recipient cells. Not only arethe donor leukocytes more useful at other sites within the recipient, but the...

Researchers Discover Why Some Athletes' Performances Fail To Improve On A Live-High, Train-Low Regimen

...her can't make enough EPO generally, or they can't sustain theincreased levels long enough to produce new red blood cells at high altitudes. The study may have profound implications for gung-ho elite athletes who relocateto Utah or other high-altitude states to obtain that perfect altitude-livingprescription...

Ecological Society Of America To Host Symposia At AAAS

..., as speakers discuss the amount of land needed to sustain a population and its consumptive habits. Alien Invasions! Impacts and Control of Non-indigenous Species. Sunday, January 24, 2:30 p.m. - 4:30 p.m. Expansion of global trade and increases in human mobility have led to unprecedented invasion by non...

Gene Knockout Prolongs Ovarian Lifespan In Mice

...atinactivation of a single gene in female mice can sustain ovarian function intoadvanced age. The report in the February issue of Nature Genetics describes howfemale mice in which a gene called Bax is inactivated do not experience thenormal loss of ovarian cells that occurs throughout the animal' lifetime. ...

In Logged Forests, Hunting of Wildlife Becomes Deadly 'Second Harvest'

...seed dispersal jeopardizes the forest's ability to sustain itself. Other effects include loss of protein sour...ding to the report, the ability of the industry to sustain itslogging activities will depend on acknowledging that current logging practicesare rarely sustaina...

Suppression Of Natural Fires Harms Squirrels

...ends on the fat-rich seeds ofnative bunch grass to sustain it through seven or eight months of hibernation. Before the federal government instituted a policy of suppressing wildfires earlyin the century, the meadows burned every 10-12 years, and the heat-resistantbunch-grass seeds then regreened Idaho's mead...

Key Peptides Found That Stop -- Even Reverse -- Kidney Disease In Lupus

...ich results in abnormal costimulatory signals that sustain productionof autoantibodies. This discovery has led to another type of therapy for lupususing anti-CD40 ligand antibody. The Northwestern investigators currently are conducting research to findpeptides similar to those used in the mouse model...

The Green Party

...r theenvironmental envelope can be pushed to still sustain life. This may help usdetermine whether life can remain viable after long exposure to the harshgalactic conditions of outer space....

Agronomists offer alternative approaches to gulf pollution

... an area that has too little oxygen in thewater to sustain fish and other marine creatures. The size of the hypoxic zonefluctuates from year to year, but the cigar-shaped zone can be as large as thestate of New Jersey (7,000 square miles), stretching from the mouth of theMississippi River to the Texas coastl...

A first: Endangered puaiohi birds fledge four chicks in the wild

...at at such low numbers, the population cannot sustain itself. In addition to the remnant wild population, a captive flock of 16 puaiohi is maintained at the Keauhou Bird Conservation Center near Volcanoes National Park by The Peregrine Fund, a private conservation organization. ...

UNC-CH scientist encourages all to watch PBS series on microbes

...bes -- those tiny miracle workers that created and sustain all life on Earth -- will be the subject of a four-part television series focusing exclusively on the microbial world and how it affects life on Earth. The hour-long programs will begin Tuesday (Nov. 9) at 8 p.m. on the Public Broadcasting System. A...

Illinois waterways, waterfowl detailed in new book

...o appreciate the wetlands and the water birds they sustain in the Mississippi Flyway," said Stephen P. Havera, the author and the director of the INHS Frank C. Bellrose Waterfowl Research Center in Havana, Ill. "The abbreviated field guide makes available selected highlights from its companion volume." Have...

Howard Hughes Medical Institute awards $92 million in research support to U.S. medical schools

...ded $80 million to 30 medical schools to help them sustain their commitment to biomedical research. The new grants bring to $172 million the awards made to medical schools for biomedical research support. "Medical schools are where a great many of the most important biomedical advances occur, yet they are...

For a fish, there's no place like home, say major studies, offering key information for fisheries management

...s well as evaluating the capability of reserves to sustain exploited stocks, we need to have some empirical techniques that allow us to evaluate the level of connectivity among populations of marine organisms." In Nature's "News and Views," Stephen R. Palumbi, from the Department of Organismic and Evolution...

Researchers find new mechanism for growing new blood vessels

...milies and other angiogenesis related genes and to sustain this therapeutic response....

Columbia University College of Physicians and Surgeons receives $2.4 Million grant from Howard Hughes Medical Institute

...cational affairs. "This funding will help Columbia sustain its critical research programs as we continue to advance Columbia's commitment to improve health through education, discovery, and compassionate medical care of the highest quality."...

Test provides accurate, noninvasive method to determine fetal lung development, UF researchers find

...us is threatened. Its lungs may be too immature to sustain life after birth, but staying in the womb puts it and its mother at risk of infection. Results from a new University of Florida study may help physicians determine whether an immediate delivery is the best course of action for the 130,000 women in ...

New science resources available from the ESA

...found that forest reserves are much more likely to sustain a wide diversity of plant and animal life than lands managed primarily for timber production. Furthermore, the common belief that timber harvesting can duplicate or substitute for the ecological effects of fires, windstorms and tornadoes is incorrec...

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