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Tag: "steady" at biology news

Ice core 'dipstick' indicates West Antarctic ice has thinned less than believed

...al layers get much thinner than they would be in a steady state," Waddington said. Waddington is lead author of a paper describing the research, which is being published online March 23 in Geology, a journal of the Geological Society of America. Co-authors are Howard Conway and Eric Steig of the UW; Richar...

The very unexpected life and death of a leukemic cell

...L cells is highly variable, and does not exhibit a steady birth and death rate as previously thought. The data also reveal that a correlation exists between the rate at which CLL cells are born and the clinical activity or progression of the disease in a patient. The disease activity may vary over time and...

NIH Calls on Scientists to Speed Public Release of Research Publications

...at a time when demand for such information is on a steady rise. "With the rapid growth in the public's use of the Internet, NIH must take a leadership role in making available to the public the research that we support," said NIH Director Elias A. Zerhouni, M.D. "While this new policy is voluntary, we are...

Biodiversity hotspots identify conservation priorities

... Atlantic Forest, and Madagascar looks set to hold steady following President Marc Ravalomanana's recent pledge to triple the size of his nation's protected area network. "The new hotspots analysis ensures that we will continue to direct conservation funds to the areas where we can have the greatest possib...

Protein prevents detrimental immune effects of bacterial sepsis

...were treated with LPS, the immune system induced a steady migration of white blood cells from the blood into affected tissues. However, mice deficient for annexin 1 exhibited a dramatic release of white blood cells from blood vessels, ultimately leading to 100% mortality by 48 hours. The researchers charac...

Oxygen increase caused mammals to triumph, researchers say

...sphere at any given time, Falkowski says. From a steady 10 percent ?the level at which dinosaurs flourished ?the oxygen percentage rose to 17 percent 50 million years ago and then to 23 percent by 40 million years ago. "In the fossil record, we see that see that this rise in oxygen content corresponds e...

Chemical 'band-aid' prevents heart failure in mice with muscular dystrophy

...mice became unstable, started shaking and showed a steady increase in fluorescence, providing direct evidence for membrane damage. When U-M scientists repeated the stretch test after bathing both types of cells with a solution of poloxamer 188, they found that it restored the ability of mdx myocytes to han...

Study shows eutrophic lakes may not recover for a millennium

...the world, and in recent decades has experienced a steady decline in water quality due to accelerated runoff and the resulting eutrophication. But the lake is similar in most respects to lakes anywhere in the world, Carpenter says, and the results of the new study are generally applicable to lakes anywhere...

Restaurant seafood prices since 1850s help plot marine harvests through history

...e inflation-adjusted price of an abalone meal held steady at about $7 (in 2004 currency) for roughly 20 years. The price spiked sharply in the 1930s as the species was over-harvested and again in the 1950s, since which time the price has risen 7 to 10 times faster than inflation. California banned commerci...

Chernobyl: The true scale of the accident

...ations or overall health of children. A modest but steady increase in reported congenital malformations in both contaminated and uncontaminated areas of Belarus appears related to better reporting, not radiation. Did the trauma of rapid relocation cause persistent psychological or mental health problems? ...

How E. coli bacterium generates simplicity from complexity

...complexity basically enables it to generate a nice steady state for itself regardless of what it has to live on." Higher organisms have larger genomes and much more complexity, but Palsson noted that several theoretical studies predict that even eukaryotic cells will exhibit a relatively small number of fu...

Bacteria that cause tooth decay able to survive without important biochemical pathway

...e of the cells, where they are inserted. Without a steady infusion of proteins, the membrane weakens and the cell - in this case, a bacterium - becomes unable to protect itself from harsh environmental conditions. In the human mouth, its natural environment, it is typically S. mutans that goes on the atta...

Scientist measures role of science's coolest player: The snow

...s, whose work comes amidst mounting reports on the steady melt of Arctic ice. "I wanted to quantify the influence of global snow cover on the present-day climate because that has relevance for the type of climate changes we are expecting in the future." Vavrus will discuss his findings today during the fal...

Scientists discover interplay between genes and viruses in tiny ocean plankton

...y of Prochlorococcus in the oceans, which maintain steady population sizes over vast regions of the sea," she said. ...

MIT: Oceans are a major gene swap-meet for plankton

... of Prochlorococcus in the oceans, which maintains steady population sizes over vast regions" of the sea. The collective Prochlorococcus community merely adjusts internally, with different groups (genome types) waxing and waning in relative abundance, depending on who is most fit under ever-changing circum...

CU, USDA team to curb two invasive, poisonous vines

...biological control to stem the growth of and their steady conquest of local ecosystems in the northern United States and Canada, Cornell University is teaming up with the U.S. Department of Agriculture's Agricultural Research Service (USDA-ARS), which operates a federal laboratory at Cornell. Pale and blac...

Study finds evolution doesn't always favor bigger animals

...illion years, global climate has been exhibiting a steady cooling trend. But within the last century, as greenhouse emissions have accumulated in our atmosphere, temperatures have rapidly warmed. "If you look at most of life today, they've all been adapted to a world getting gradually cooler," said Roy. "...

Researchers reveal lung's unique innate immune system

...system in which the macrophage is repressed in its steady state, activated when called upon to fight invading microorganisms, and then re-repressed, in a circuit that is unique to this microenvironment. "Dissecting this immune mechanism provides us with the knowledge of how we might prolong the activat...

How sperm crack the whip

...a use to abruptly convert their tail motion from a steady swimming undulation to the whip-cracking snap that thrusts them into an egg. The finding opens a new research pathway that the researchers said could help scientists both recognize new forms of male infertility and design new contraceptives to thwart...

Bacteria beat the heat

...tion rates peaked at a certain point, and remained steady thereafter. For each enzyme, the peak occurred in the bacteria's "comfort zone." Further comparisons of the enzymes, which were nearly identical, turned up differences in just two of the hundreds of amino acids making up the enzyme sequence. When the...

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