Tag: "cycle" at biology news
Bursts of waves drive immune system 'soldiers' toward invaders
...new research shows. The scientists think that this cycle
of Hem-1 propulsion and annihilation is likely to ...ve," he says. The Hem-1 recruitment assures the cycle
will continue. The cycle, or circuit, of activation, recruitment and inhibition, as it is called, ca...
What we can learn from the biggest extinction in the history of Earth
...tion event may hold clues to current global carbon cycle
changes, according to Jonathan Payne, assistant pr...d diversification of reefs after the global carbon cycle
began to stabilize. Reef communities are a sort of canary in the mineshaft, Payne explained. Toda...
How cells change the pace of their steps
...ls use what cell biologists call the cell motility cycle
to take one step per cycle: first, the cell extend...utes in Dictyostelium cells, but the period of the cycle
and the length of each step can be shorter or longer in other types of eukaryotic cells. The scien...
National Ecological Observatory Network featured at ESA/SER Joint International Conference
...logy; and climate change effects through the water cycle
(rain or snow, permafrost, runoff). The focus of NEON complements the theme of the ESA/SER joint meeting, Ecological Restoration in a Changing World. Society depends on ecosystems in the same way it depends on weather, water resources, and agricult...
UC experts detail new standard for cleaner transportation fuels
...ts and reduce this value over time. (The term life cycle
refers to all activities included in the production, transport, storage and use of the fuel.) The report suggests that petrofuel providers would reduce their greenhouse-gas emissions in a variety of ways, including blending more biofuel with gasol...
Identified mechanism in the malaria parasite to help it adapt to infected individuals
...ood cells is an essential step of the complex life cycle
of this parasite. During the process of invasion, P. falciparum, which appears in the stage of a merozoite, is exposed to antibodies from the immune system. Consequently, the proteins of the merozoite that interact with red blood cells are a possible...
ESA mission highlighted at remote sensing conference
...e to furthering our knowledge of the Earth's water cycle
and lead to better weather and extreme-event forec...isture plays an important role in the global water cycle
as it controls vegetation growth to a large extent. Because in-situ measurements of soil moisture ar...
Jan Lwe awarded 2007 EMBO Gold Medal
...lutionised our understanding of the bacterial cell cycle
and cell morphogenesis, through his insightful structural studies on virtually all of the key players, says Jeff Errington, Director of Newcastle Universitys Institute for Cell and Molecular Biosciences. His work highlights the complexity and sophist...
Researchers watch antibiotics, bacteria meet at atomic level
...chain. This loop must open again to allow the next cycle
to happen. If something such as an antibiotic keeps the loop from closing, RNA polymerase can't properly function and stalls. This loop is a target for antibiotics, including streptolydigin, Artsimovitch said. If we can design new drugs that will p...
CTRC enrolls first patients in novel phase II study for sarcoma -- living virus destroys cancer cell
... CTRC, I had already been through one chemotherapy cycle
for this disease, and I got the impression that no one really knew what to do with me or how to treat my cancer. REOLYSIN was a less toxic option for me. "We are delighted, but not surprised, with the rate of accrual at the CTRC Institute for Dr...
...gel and brush stick to each other once again. This cycle
can be repeated many times by simply changing the pH value. Possible applications for such smart surface pairs include microelectromagnetic components (actuators), components for microfluidic systems, or carriers for pharmacological agents that cou...
...ng pups, which ultimately disrupts the hair growth cycle
and renders them largely bald. In fact, treatment with the common anti-inflammatory aspirin completely rescues hair loss in these pups....
Charting ever-changing genomes
...simple to grow in the laboratory, has a short life cycle
and a small genome. Compared to corn, which might have as many as 2.5 billion base pairs of DNA and the human genome with roughly 3 billion pairs, Arabidopsis only has about 120 million base pairs of DNA. With nowhere to run, plants are under cons...
News tips from the Journal of Neuroscience
...ic doses of sedative drug normalized the sleepwake cycle
and improved cognitive performance on the two-choice swim test in the R6/2 mice and regulated their expression of SCN circadian genes. Although not a cure for HD, symptomatic treatment for disrupted sleep would appear to have its benefits. ...
Cardiac patches stimulate regeneration, improve function after heart attack
...ut 1 percent of the cells entered the mitotic cell cycle
namely, they began dividing and replicating. (One percent seems like a small proportion, but normally the percentage is close to zero.) We found a small subpopulation of cells that could, with proper stimulation, re-enter the cell cycle, says Kuhn...
The origin of perennial water-ice at the South Pole of Mars
... juggled between Mars North and South Poles over a cycle
that spans 51 000 years, corresponding to the time...re thick. About 10 000 years ago the precession cycle
was inverted, and started to return to its current configuration. Water-ice at the South Pole became...
JCI table of contents: July 12, 2007
...ap1 in the brain regulates the female reproductive cycle
The onset of puberty and maintenance of the female reproductive cycle
are events controlled by neurons in the hypothalamus that secrete gonadotropin-releasing hormone (Gn...
How plants learned to respond to changing environments
...pt their growth, including key steps in their life cycle
such as germination and flowering, to take advantage of environmental conditions. They can also repress growth when their environment is not favourable. This involves many complex signalling pathways which are integrated by the plant growth hormone...
Mild stress in the womb may worsen risk of cerebral palsy
... In the study, the scientists adjusted the normal cycle
of light and dark that the pregnant mice were accustomed to for half of the mice, subjecting them to a mild level of stress. Then the researchers exposed the brains of the developing fetuses to injury. When the brains of the young mice were examined ...
Piecing together the cyanobacteria puzzle
...algae are significant species in the global carbon cycle
because they transform nitrogen gas from the atmosphere into a useable nutrient, enabling photosynthesis in nutrient-poor waters. Using NanoSIMS (high- resolution secondary ion mass spectrometer), Lawrence Livermore National Laboratory, USC and P...
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