Tag: "stream" at biology news
Role of the nervous system in regulating stem cells discovered
... system restored stem cell movement into the blood stream
in mice with an impaired ability to respond to norepinephrine, the signature chemical messenger of the sympathetic system. "The nervous system plays an important role in producing signals that maintain the stem cell niche and retention in bone marrow...
Report highlights DOE Joint Genome Institute achievements
... inside an abandoned mine. For decades this toxic stream
has seeped out to pollute a prominent river system costing millions of dollars annually to remediate the situation. With the help of DNA sequencing, cheaper, more effective strategies to combat this problem are coming to light. "In the same way the ...
Unified physics theory explains animals' running, flying and swimming
...eptible as it may be spread across an entire lake, stream
or ocean. "The water can only go up because the bottom and sides of the channel are rigid," Bejan said. "That bulge, however undetectable, is the fish's footprint." Fish must, therefore, work against gravity to lift an amount of water equal to their...
Storing carbon to combat global warming may cause other environmental problems, study suggests
..., said the researchers. "We believe that decreased stream
flow and changes in soil and water quality are lik...her than crops or pastures "dramatically decreased stream
flow within a few years of planting," the authors wrote. Water use within existing tree plantations ...
Russian River coho recovery project seeing first hopeful signs of success
... of the program resulted in more than 40 completed stream
enhancement and habitat restoration projects on ta... willow baffles were installed to shore up eroding stream
banks. Invasive plant species were ripped out and replaced with natives. Roads were regraded. Vine...
From intelligent cars to the prevention of heart attacks
...ctions between individual cells in the human blood stream
play a key role for the perfusion of organs as well as for curing cardio-vascular diseases, the basics of these interactions have yet to be fully explored. The Collaborative Research Centre "Mechanisms and imaging of cell-cell interactions in the car...
Surprise! Computer scientists model the exclamation point
... problem has been phrased in the vocabulary of the stream
of electronic data making up a video image, as a p...next step is to use this theory to analyze a video stream
to describe what are the streams most "surprising," features. Finally, having performed this analysi...
APS physics tip sheet #57
...e particles that were swept past a laser beam in a stream
of water. Unlike conventional detection techniques, the laser interferometer sensor does not require that small particles be specially treated or immobilized on a surface for detection. It is also much faster than most other methods, detecting partic...
Polymer gel can block toxic leakage problem in gene therapy
...ring viruses from being diverted through the blood stream
to the wrong targets, the scientists reported in r...ty of tumor cells by being injected into the blood stream
but instead must be injected directly into tumors themselves. However, direct intratumoral injection...
Nanoparticles, nanoshells, nanotubes: How tiny specks may provide powerful tools against cancer
...ice researchers injected nanoshells into the blood stream
of mice implanted with colon cancer knowing, based on previous experiments, that the nanoshells would preferentially accumulate in the tumors. This occurs because blood vessels that develop in fast-growing solid tumors are ill-formed and permeable, a...
Ultrasound a diagnostic tool for space, sports and more
...nal and musculoskeletal ultrasound scans. A video stream
from the ultrasound device is split between the on-site monitor and the remote location. Watching the simultaneous video feed, the remote medical expert can see the trainee's ultrasound images. He or she uses voice commands to guide the operator in...
Study uses stream fish as indicators of water quality
...ams, rivers, lakes, and estuaries. "Our study uses stream
fish as indicators of environmental quality. Strea... ways. As a result, we can assess the quality of a stream
based on the diversity and abundance of fishes we find there," said Hitt, who is working with associ...
Popular insecticide detected in suburban stream beds
...oncentrations of a popular insecticide in suburban stream
sediments, raising concerns about its effects on aquatic life. Pyrethroids, the active ingredient used in most home and garden insecticides, have been on the market for years. Although the compounds are considered potentially less harmful to humans ...
U of MN researchers use human embryonic stem cells to kill cancer cells
...ral killer cells normally are present in the blood stream
and are play a role in defending the body against infection and against some cancers. "This is the first published research to show the ability to make cells from human embryonic stem cells that are able to treat and fight cancer, especially leuke...
New protocol tracks how land use influences the way streams work
... to determine the effect of different land uses on stream
quality across 10 watersheds of the French Broad R...urban development. The entities are components of stream
land ecosystems. The scientific term is "path analysis" and it is a statistical process more often ...
How the brain sorts babble into auditory streams
... alternate slowly, the listener perceives a single stream
that sounds like a galloping horse. However when t...us monkeys and the perceptual build-up of auditory stream
segregation measured in humans listening to similar sound sequences," concluded the researchers. In ...
A new angle on flowers: Fish are players in pollination
...grizzlies and other predators to reducing mountain stream
nutrient levels. The fish-flower research shows the same potential for human impacts at a far more local and everyday level. People may never notice, but when they create, fill or drain a pond, or stock it, the ecological ripples lap onto shore. "The...
Nocturnal dialysis improves heart disease in patients with end-stage kidney failure
...ther the cells were able to migrate into the blood stream
to get to an injury site; LVMI, which measures the weight of the heart (a thickened heart cannot pump blood efficiently and results in eventual heart failure); and blood pressure. Results on all measures showed a significant difference between the pa...
Researchers predict infinite genomes
...he researchers discovered a surprisingly continual stream
of diversity. Each GBS strain contained an average of 1806 genes present in every strain (thus constituting the GBS core genome) plus 439 genes absent in one or more strains. Moreover, mathematical modeling showed that unique genes will continue to e...
Roadways and parking lots threaten freshwater quality in the northeastern US
...verage, indicate that the urban/suburban effect on stream
chloride is prevalent over large land areas." If salinity levels continue to rise in the northeastern U.S., Kaushal and colleagues warn that within the next century many freshwater sources will be toxic to aquatic life and unfit for human consumption...
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