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Tag: "supply" at biology news

Stem cells engage in dialogue with the cells that regulate their futures

...rrent demands. The niches also help maintain a supply of stem cells for later use. Inside your body, for example, there are separate niches for stem cells that will become blood, for cells that will become skin, and so on. Niches are places where your stem cells can replenish themselves and your tissue ...

Researchers to study why dead zone returned to Lake Erie

...ti-billion dollar tourist and recreation industry, supply 40 million people with drinking water, provide habitat for wildlife and fish, and support transportation and agriculture production. Lake Erie is the smallest of the five Great Lakes. ...

It's in your head: The brain's own globin defends you from shock and stroke

...neuron survival and recovery in areas where oxygen supply is reduced. "Understanding that our brains have a hemoglobin-like molecule in our head that protects and helps restore function in the brain is an important step toward helping people who experience strokes or similar problems," said Gerald Weissm...

Research project tackles 'regeneration' gap

...k at ways to mobilize and reinforce the body’s own supply of adult stem cells to protect against or fight Alzheimer’s and Parkinson’s diseases, cancer, multiple sclerosis and traumatic injury. The project has received support from two private gifts ?from Jon and Beverly Thompson of Sanibel, Fla., and fro...

When smell cells fail they call in stem cell reserves

Hopkins researchers have identified a backup supply of stem cells that can repair the most severe damage to the nerves responsible for our sense of smell. These reservists normally lie around and do nothing, but when neighboring cells die, the scientists say, the stem cells jump into action. A report ...

Nanoparticles can track cells deep within living organisms

...hance new blood vessel growth to improve the blood supply to diabetic patients' limbs or to repair blood vessels after a heart attack or bypass surgery. Tracking nanoparticle-labeled cells used in such treatments by MRI imaging would allow physicians to monitor the treatment's success or failure. The na...

Ocean's 'twilight zone' may be a key to understanding climate change

...ese sinking particles, often called "marine snow," supply food to organisms deeper down, including bacteria that decompose the particles. In the process, carbon is converted back into dissolved organic and inorganic forms that are re-circulated and reused in the twilight zone and that can make their way to ...

Leukemic cells find safe haven in bone marrow

...to survive but do not make efficiently. This extra supply of asparagine helps leukemic cells survive treatme...raginase, a drug that normally would deplete their supply of this vital nutrient, the researchers reported. Mesenchymal cells give rise to a variety of differ...

Resistance to anti-HIV drugs in Uganda developed due to drug supply problems

...iral medications experienced interruptions in drug supply due to either financial demands or supply logistical disruptions. These treatment interruptions led to the development of resistance to antir...

Antibody signal may redirect inflammation to fuel cancer

...rams, stimulating cell growth and increasing blood supply -- processes that would normally help healing from an infection, but can instead fuel cancer cell development." The researchers have not yet identified what specific signal or signals are involved, but preliminary evidence indicates that antibodie...

Growth hormone is not the anti-aging bullet for healthy adults

...ent therapy. One physician estimated that a year's supply for an adult with GH-deficiency caused by pituitary disease would cost between $7,500 and $10,000 per year. Estimates of the cost of GH for anti-aging purposes range from $1,000 per month to $2,000 per month. "Everyone is looking for the fountain ...

Researchers create artificial enzyme that mimics the body's internal engine

...film on a gold electrode, which provided a nonstop supply of electrons to the model as it transformed oxygen...Collman's group had solved the continuous electron supply problem, the scientists systematically removed each of the three active centers-phenol, iron and cop...

Failure to meet United Nations sanitation target could affect millions of the world's poorest

...eople worldwide live without a safe drinking water supply and more than 2.5 billion people don't have basic hygiene facilities, according to the United Nations. Davis, a participant in the U.N. Millennium Project task force, attributed the lack of success in reaching the sanitation target to a myriad of rea...

New biofuels process promises to meet all US transportation needs

... "We could use H2CAR to provide a sustainable fuel supply to meet the needs of the entire U.S. transportatio...estimated that the United States has a sustainable supply of about 1.4 billion tons of biomass each year that could be used specifically for the production of...

UW launches study testing adult stem cells for heart damage repair

...the coronary arteries and the smaller vessels that supply oxygen-rich blood to the heart muscle become narrowed or blocked by plaque deposits and blood clots. Poor blood flow and blood clots "starve" and injure the heart muscle. The American Heart Association estimates that every year, between 125,000 an...

Blame the brain for high blood pressure

... may obstruct blood flow, resulting in poor oxygen supply to the brain. This has led to the idea that high b...ted causes of high blood pressure related to blood supply to the brain. It therefore opens up the possibility of new ways to treat this common, but often poor...

Scientists discover new, readily available source of stem cells

... a bank with 100,000 specimens theoretically could supply 99 percent of the U.S. population with perfect genetic matches for transplantation. There are more than 4 million live births each year in the United States. In addition to being easily obtainable, the AFS cells can be grown in large quantities be...

How fish species suffer as a result of warmer waters

... a warming induced deficiency in oxygen uptake and supply to tissues is the key factor limiting the stock si...With increasing temperature, the organism's oxygen supply is the first to deteriorate, followed by other biochemical stress responses. Finally, oxygen supply ...

Stem cells act through multiple mechanisms to benefit mice with neurodegenerative disease

...n. The transplanted cells also boosted the brain's supply of the enzyme Hex, which reduced the lipid accumul...ts from a genetic mutation that reduces the body's supply of an enzyme, called hexosaminidase ("hex"), used by brain cells to metabolize excess fatty material...

How trees manage water in arid environments

... can soak into the ground. Maintaining an adequate supply of water is a constant challenge, and water management is a top priority. One way to make better use of scarce water resources would be to retain more of the water that falls during a heavy rain. To accomplish this, better understanding is needed ...

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