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Latest Hypoxia Stories

2009-05-05 08:02:43

Obstructive sleep apnea, or periodic interruptions in breathing throughout the night, thickens sufferers' blood vessels.  Moreover, it increases the risk of several forms of heart and vascular disease. Emory researchers have identified the enzyme NADPH oxidase as important for the effects obstructive sleep apnea has on blood vessels in the lung. The results are published in the May 1 issue of the American Journal of Respiratory Cell and Molecular Biology. C. Michael Hart, professor of...

2009-03-27 10:25:00

DAYTONA BEACH, Fla., March 27 /PRNewswire-USNewswire/ -- Caroline Brozovich's fingers and lips have turned blue-grey, her movements are sluggish, and her eyes half-shut, as though she's peering through a fog. The oxygen around her is now as thin as the air at 30,000 feet, the cruising altitude for jet aircraft. If Brozovich were piloting an airliner, she and her passengers would be minutes away from unconsciousness - and death. But Brozovich is a flight student at Embry-Riddle Aeronautical...

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2009-01-30 07:37:08

Scientists are learning how to rescue oxygen-starved cells in humans who suffer a heart attack or stroke by studying microscopic worms that can survive with almost no oxygen. Washington University School of Medicine neurobiologists in St. Louis, MO, have identified pathways that allow microscopic worms to survive in a low-oxygen environment. Researchers say the finding could have implications for patients suffering from stroke, heart attack and cancer. "In stroke and heart attack, cells die...

2009-01-28 11:46:01

Danish scientists are warning that uncontrolled global warming might significantly expand the ocean's dead zones, seriously affecting fish and shellfish. Dead zones are low-oxygen areas in the ocean where higher life forms such as fish, crabs and clams are not able to live, the University of Copenhagen researchers said. In shallow coastal regions, such zones can be caused by runoff of excess fertilizers from farming. Professor Gary Shaffer, who led the study, said unchecked global warming...

2008-10-16 18:00:15

A U.S. ecologist says he's found a commercially valuable species of clam thriving in oxygen-depleted waters of a so-called "dead zone" off the East Coast. Andrew Altieri, a post-doctoral researcher at Brown University, discovered the population of quahog clams increased in hypoxic zones, defined as areas in which dissolved oxygen in the water has been depleted. He said he determined whether quahog clams have a natural capacity to survive in oxygen-starved waters, but their predators...

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2008-10-15 10:45:00

Coastal dead zones, an increasing concern to ecologists, the fishing industry and the public, may not be as devoid of life after all. A Brown scientist has found that dead zones do indeed support marine life, and that at least one commercially valuable clam actually benefits from oxygen-depleted waters. Andrew Altieri, a post-doctoral researcher in the Department of Ecology and Evolutionary Biology at Brown University, studied dead zones in Narragansett Bay, one of the largest estuaries on...

2008-09-25 17:46:30

By E.B. FURGURSON III Staff Writer A massive fish kill yesterday covered both shores of Bear Neck Creek off the Rhode River, the fifth such event this month for Anne Arundel. State officials and the local Riverkeeper believe the kill was due to low oxygen related to an algae bloom in the creek on the south side of the Mayo Peninsula. "This whole creek is one big kill zone," West/Rhode Riverkeeper Chris Trumbauer said yesterday after kayaking around the creek to examine the situation....

2008-09-24 03:00:12

By Yeom, Chan Joo Chung, June-Key; Kang, Joo Hyun; Jeon, Yong Hyun; Kim, Kwang Il; Jin, Yong Nan; Lee, You Mie; Jeong, Jae Min; Lee, Dong Soo Hypoxia-inducible factor-1 (HIF-1) is a transcription factor of hypoxic response in cancer cells and is associated with tumor progression, angiogenesis, metastasis, and resistance to therapy. We assessed whether the human sodium iodide symporter (NIS) reporter systems can be used to visualize transcriptional activation of HIF- 1 in C6 glioma. Methods:...

2008-09-17 00:00:28

Men who suffer from sleep apnea, often also have trouble getting sexually aroused, research on mice at the University of Louisville indicates. Dr. David Gozal said new research indicates erectile dysfunction may be linked to the chronic intermittent hypoxia -- oxygen deprivation -- patients with obstructive sleep apnea syndrome experience during episodes of obstructed breathing. The researchers found that after one week of being exposed to chronic intermittent hypoxia similar to that...

2008-08-18 18:00:23

By Bina Venkataraman Many coastal areas of the world's oceans are being starved of oxygen at an alarming rate, with vast stretches along the seafloor depleted of it to the point where they can barely sustain marine life, researchers are reporting. The main culprit, scientists say, is nitrogen-rich nutrients from crop fertilizers that spill into coastal waters by way of rivers and streams. A study to be published Friday in the journal Science says the number of these marine "dead zones"...


Word of the Day
negawatt
  • A unit of saved energy.
Coined by Amory Lovins, chairman of the Rocky Mountain Institute as a contraction of negative watt on the model of similar compounds like megawatt.