Tag: "hypoxic" at biology news
Alternative farming cleans up water
...ination of water can contribute to waters becoming hypoxic
and stress aquatic life living downstream. The challenge facing industry, farmers, agricultural advisors, and others concerned about the environment is to develop efficient cropping systems that maintain economical production levels while minimizin...
News tips from the Journal of Neuroscience
...ot the whole story of neuroprotection, however, as hypoxic
preconditioning was still neuroprotective in HIF-1-deficient mice....
Hearts of male and female rainbow trout are different
...ce and energy metabolism have been conducted under hypoxic
(oxygen shortage) conditions, but gender was not s...ancer), or (c) glucose + NaCN under oxygenated and hypoxic
conditions. The researchers measured several indices of contractile performance (resting tension,...
Breathing easy: When it comes to oxygen, a bug's life is full of it
...ing their activity. "Insects are able to survive hypoxic
environments," explained Kirkton, the symposium ch...ty of its nerve cells to remain healthy even under hypoxic
conditions. The research aims to lead to better ways to protect humans who suffer periods of hypoxia...
Tracking sperm whales and jumbo squid
...s at the surface. "By hunting deep in this cold, hypoxic
environment at night, as well as during the day, sperm whales may favor jumbo squid that are in some way compromised and thus easier to capture," the authors wrote. "This research provided a unique opportunity to learn more about two species that a...
JCI table of contents -- February 22, 2006
...from some of the more severe effects of hypoxia by hypoxic
preconditioning (HPC), i.e., exposure to moderately decreased amounts of oxygen. In a study that appears online on February 22 in advance of publication in the March print issue of the Journal of Clinical Investigation, Juan Ibla and colleagues fro...
Changes in west coast marine ecosystems significant
...d by shifts in phytoplankton production, expanding hypoxic
zones, and the collapse of marine food webs off th...long the Oregon coast were affected. "This latest hypoxic
event," he added, "was off the charts." Nature threw a different wrinkle at the California Current ...
Newly discovered West Coast arrhythmias cause
...rises, but many mysteries remain. Despite intense hypoxic
zones, for example, Dungeness crab catches in Oregon have been high in the last few years. In California, scientists are trying to understand why rockfish populations appear to be congregating in the northern and southern ends of their ranges. Futu...
Deadly hypoxic event finally concludes
...S, Ore. The longest, largest and most devastating hypoxic
event ever observed in marine waters off the Oreg...ygen below 1.4 milliliters per liter is considered hypoxic
for most marine life, and many areas were below that, some 10-30 times lower than normal, others app...
Seals protect brain, conserve oxygen by turning off shivering response on icy dives
...ving birds, at the conference. The study "Neuronal hypoxic
tolerance in diving birds and mammals," examines how diving birds and seals preserve brain cell function in the face of oxygen deficits. The study is by Folkow, Stian Ludvigsen and Blix, of the University of Troms and Jan-Marino Ramirez of the Univer...
Oxygen deprived brains repaired and saved
...iencing hypoxia, and also to improve recovery from hypoxic
induced brain damage. ...
'Dead Zone' causing wave of death off Oregon coast
...ygen below 1.4 milliliters per liter is considered hypoxic
for most marine life. In the latest findings from one area off Cape Perpetua on the central Oregon coast, surveys showed 0.5 milliliters per liter in 45 feet of water; 0.08 in 90 feet; and 0.14 at 150 feet depth. These are levels 10-30 times lower th...
Marine 'dead zone' off Oregon is spreading
CORVALLIS, Ore. A hypoxic
"dead zone" has formed off the Oregon Coast for th...f the available oxygen near the sea floor, causing hypoxic
conditions for marine life. The first event in 2002 caused a massive die-off of fish and invertebrat...
New tool tracks brain development in babies
...seven normal infants and 10 infants with perinatal hypoxic
ischemia, a type of brain injury caused by a period of oxygen and nutrient deficiency, usually as a result of complications during delivery. Hypoxic ischemic injury can result in severe motor problems. "The pattern and extent of the brain injury larg...
'Dead zone' summer killed billions of ocean state mussels
...city of mussels in the reefs, before and after the hypoxic
event. They found that the healthy mussels could filter the equivalent of the entire volume of Narragansett Bay in just 20 days. But within weeks of the die-off, that filtering capacity dropped by 75 percent. Altieri said this is an important, and tr...
Ocean 'dead zones' trigger sex changes in fish, posing extinction threat
.... Even though some tolerant species can survive in hypoxic
zones, they may not be able to migrate out of the ...fficult for marine life to survive. Although some hypoxic
areas dead zones develop naturally, scientific evidence suggests in many coastal areas and inland ...
Hopkins researchers discover genetic switch that turns off an oxygen-poor cell's combustion engine
...ndrion runs on oxygen, it doesn't work properly in hypoxic
conditions, Dang explained. Instead, glycolysis is...igators exposed these so-called HIF-1 null MEFs to hypoxic
conditions, the cells were unable to activate PDK to block mitochondrial function. This showed that ...
Adaptation to oxygen deprivation elucidates tumor physiology
...actor. "Over a century ago, Pasteur described that hypoxic
cells increase the conversion of glucose [the body... kinase 1 (PDK1). Dang's group showed that, under hypoxic
conditions, mouse cells lacking HIF-1 fail to activate PDK1 and undergo cell death (apoptosis) follo...
Second low-oxygen pathway hints at cancer, cardiovascular disease physiology
...ope to gain a better understanding of the abnormal hypoxic
environments that are characteristic of many disea...e in protein synthesis. This finding is the second hypoxic
cellular pathway to be identified by this research team. Simon, who is also a member of Penn's Abram...
Joslin study sheds light on birth defect cause in pregnant women with diabetes
...as it is consumed. This has the potential to cause hypoxic
stress, or damage to cells caused by low oxygen (h...se new experiments showed that glucose also caused hypoxic
stress in embryos. However, what Dr. Loeken and her colleagues did not know was whether glucose caus...