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Latest Hypoxia Stories

2010-05-17 08:31:49

Sleep apnea may cause metabolic changes that increase insulin resistance, according to researchers from the University of Pittsburgh Medical Center. The intermittent hypoxia associated with sleep apnea causes a distinct drop in insulin sensitivity in mice, even though chronic hypoxia, such as that associated with high altitude, did not. The research was reported at the ATS 2010 International Conference in New Orleans. To determine whether intermittent hypoxia (IH) and chronic hypoxia (CH)...

2010-05-05 11:36:34

A special issue of Progress in Cardiovascular Diseases High altitude medicine is a "natural research laboratory" for the study of cardiovascular physiology and pathophysiology. As such, it can shed light on conditions and diseases that mimic the low oxygen content of the atmosphere at the top of mountains. Yves Allemann, MD, FESC, Swiss Cardiovascular Center, University Hospital, Bern, and Urs Scherrer, MD, Centre Hospitalier Universitaire Vaudois, Lausanne, have assembled an international...

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2010-04-30 07:58:54

A unique three-year longitudinal and vertical study of Central New York's Three Rivers system"”involving the Oswego, Oneida and Seneca rivers"”has revealed that oxygen resources have become degraded by several stressors, including the impact of wastewater treatment plants, nonpoint runoff, an increase in invasive zebra mussels and channelization of the flow. As oxygen is necessary to support life in aquatic ecosystems, its measurement is essential for gauging the overall state of...

2010-04-07 08:49:56

Deep under the Mediterranean Sea small animals have been discovered that live their entire lives without oxygen and surrounded by 'poisonous' sulphides. Researchers writing in the open access journal BMC Biology report the existence of multicellular organisms (new members of the group Loricifera), showing that they are alive, metabolically active, and apparently reproducing in spite of a complete absence of oxygen. Roberto Danovaro, from the Polytechnic University of Marche, Ancona, Italy,...

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2010-03-24 11:12:55

Some regions of the deep ocean floor support abundant populations of organisms, despite being overlain by water that contains very little oxygen, according to an international study led by scientists at the United Kingdom's National Oceanography Center, Southampton. But global warming is likely to exacerbate oxygen depletion and thereby reduce biodiversity in these regions, they warn. The sunlit surface waters tend to be well oxygenated as a result of their connection with the atmosphere....

2010-03-23 11:35:00

COLUMBUS, Ohio "“ Scientists have determined that chronic wounds might have trouble healing because of the actions of a tiny piece of a molecular structure in cells known as RNA. The Ohio State University researchers discovered in a new animal study that this RNA segment in wounds with limited blood flow lowers the production of a protein that is needed to encourage skin cells to grow and close over the sore. In a parallel experiment using human skin cells, the researchers silenced the...

2010-03-09 11:50:13

Research could help treatments for retinoblastoma and breast cancer What began as research into how diabetics could possibly preserve their eyesight has led to findings that could prolong the vision of children afflicted with retinoblastoma. Dolores Takemoto, a Kansas State University professor of biochemistry who was researching protein kinase C gamma in the lens of the human eye, found her work taking a fascinating turn when she discovered a correlation between the protein Coonexin46 and...

2009-12-15 22:21:15

A new study of Pacific Ocean sediments off the coast of Chile has found that  offshore waters experienced systematic oxygen depletion during the rapid warming of the Antarctic following the last "glacial maximum" period 20,000 years ago. The findings are intriguing as scientists are exploring whether climate change may be contributing to outbreaks of hypoxia "“ or extremely low oxygen levels "“ along the near-shore regions of South America and the Pacific Northwest of the...

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2009-10-10 08:36:32

Scientists work to explain why massive "dead zones" have been invading the Pacific Northwest's near-shore waters since 2002 Yet another ecological scourge may earn a place on the ever-lengthening list of problems potentially caused by climate change: the formation of some so-called "dead zones""”huge expanses of ocean that lose virtually all of their marine life at depth during the summer. Possible connections between climate change and the relatively recent formation of dead zones in...

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2009-09-16 10:24:52

Scientists in Pennsylvania report that boosting production of crops used to make biofuels could make a difficult task to shrink a vast, oxygen-depleted "dead zone" in the Gulf of Mexico more difficult. The zone, which reached the size of Massachusetts in 2008, forms in summer and threatens marine life and jobs in the region. Their study is scheduled for the Oct. 1 issue of ACS' semi-monthly journal Environmental Science & Technology. Christine Costello and W. Michael Griffin and...


Word of the Day
ramage
  • Boughs or branches.
  • Warbling of birds in trees.
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