Tag: "oxygen" at biology news
Plant hemoglobins: Oxygen handlers critical for nitrogen fixation
...ood, are ancient proteins with well-known roles in oxygen
transport and respiration in animals. Hemoglobins ...ndertaken by mammalian hemoglobins in facilitating oxygen
transport and exchange in the blood. The most conspicuous plant hemoglobins are the symbiotic hemogl...
Separate genes influence speed, accuracy in decoding written words in dyslexia
...e brains of dyslexic and non-dyslexic children use oxygen
during sound processing tasks. That research also showed that dyslexics can be successfully treated. A set of specialized instructional approaches developed at the UW not only helped dyslexic children improve their reading skills, but also showed t...
JCI table of contents April 1, 2005
...mental oxygen, however very high concentrations of oxygen
administered for extended periods of time can trig...e of lung injury. The authors also show that high oxygen
concentration stimulates A1, that A1 regulates death of cells in the lung, and that it plays a centr...
Chemical compounds present in diet increase risk of colon cancer
...tivation of cellular enzymes that produce reactive oxygen
species. The latter are precisely what cause damage to the DNA thereby initiating the carcinogenic process. In addition, the researchers studied other variables such as food intake to discover whether other factors were involved in increasing the ris...
In anoxia, why can't humans be more like western painted turtles?
...(April 3, 2005) For a human, mere minutes without oxygen
(called anoxia) resulting from cardiac arrest, cer...ian and reptile (turtle) brains in response to low oxygen
levels. It reduces the inflow of calcium through NMDA receptors during anoxia and is associated wit...
15 generations of untrained jocks, couch potatoes show big physiological adaptations
...tudy the genetic role in endurance performance and oxygen
delivery systems. Results of this large longitudin...line had a greater running endurance and increased oxygen
consumption (12%) than the "couch potatoes." These differences were mainly due to peripheral improv...
Scientists find viruses can't stick to sea bugs in the dark
...e as vital to the survival of life on earth as the oxygen
producing plants are on land. But marine bacteria ...n," explains Ying Jia. Algal blooms can use up the oxygen
in water and block out the sunlight that other organisms need to live. "If there is not sufficient l...
14 highlighted physiology papers from IUPS 2005: From 'genomics to functions'
...t humans be more like western painted turtles? An oxygen
shortage (anoxia) of minutes can quickly cause hum...n. Large physiological adaptations resulted in the oxygen
delivery system, supporting the theory that over time animal systems will maximize efficiency. The k...
Six week mini-med school to focus on the fascinating science of aging
... will explore the biochemical processes, including oxygen
free radicals, protein crosslinking, heat shock proteins, and breakdowns in DNA repair mechanisms, that make our cells more susceptible to damage associated with aging. She will also discuss what is known about antioxidants and other biochemicals tha...
Children of mothers with preeclampsia more likely to have pulmonary hypertension
... problem, high altitude sickness caused by lack of oxygen
in the air, is familiar to many who travel to high...iggered by certain conditions, such as life in the oxygen
poor environment of high altitude. The increased susceptibility to re-entry pulmonary edema of child...
VCU research shows Viagra prevents anti-cancer drug induced heart damage
...ia are cellular organelles critical for converting oxygen
into ATP, the key fuel for cellular function. According to Kukreja, free radicals generated in the mitochondria of cardiac cells by DOX lead to the break down of regular cellular function, resulting in programmed cardiac cell death. Over time, cell d...
Mystery on the Hudson
...e larger amounts of DOC. This process would add to oxygen
demand, increasing the river's susceptibility to eutrophication-driven problems of hypoxia, such as regularly occurs in the Gulf of Mexico. Looking at current evidence, if carbon degradation, or the amount of carbon processed by bacteria, had not ch...
Researchers peer inside embryonic/fetal hearts to discover causes of congenital heart disease
...nd observe interactions, such as the effect of low oxygen
or how certain medications taken by the mother affect developing heart function and embryo survival. Researchers in Dr. Keller's lab also are using heart muscle cells from the chick and mouse embryos to regenerate "tissue-engineered" heart tissues in...
New technology, new approach to help heart and lung patients awaiting transplants
...function by removing carbon dioxide and increasing oxygen
levels in the patient's blood, relieving the damaged lung from performing that task. Griffith's research is focused on a prototype pump lung that could become the first artificial lung in the United States. As small as a CD player, its portability o...
Antioxidant-rich diets reduce brain damage from stroke in rats
...hemic stroke occurs when a blood clot cuts off the oxygen
supply to the brain like the kink in a hose cuts off water flow. Then, later, the clot is released and blood flow returns, which is known as reperfusion. The size of the stroke in the rats fed blueberry or spinach supplements was half that seen in th...
Toxic flame retardant accumulates in dolphins
...plays an important role in this. This complex adds oxygen
to the HBCD but it cannot react with the alpha isomer. This is due to subtle differences in the spatial structure of the alpha, beta and gamma isomer molecules. As it is not metabolised, the alpha isomer accumulates in the fat-rich tissues of sea mam...
Low oxygen likely made 'Great Dying' worse, greatly delayed recovery
...tists suggests that a sharp decline in atmospheric oxygen
levels was likely a major reason for both the elev...d above sea level became uninhabitable because low oxygen
made breathing too difficult for most organisms to survive, said Raymond Huey, a UW biology professo...
JCI table of contents May 1, 2005
...OS3, to become a major source of damaging reactive oxygen
species. The authors showed that treatment with BH4 inhibited ROS generation and cardiac hypertrophy. These data suggest that BH4, which is already being tested for hypertension, may be useful for decreasing the damage of hypertrophy and preventing ...
The promise of new medical uses for sodium nitrite for heart attack and organ damage
...ic oxide in the organs and tissues with the lowest oxygen
levels, allowing for targeted NO delivery and thus improved blood flow -- to tissues under stress. More research is needed to look at the effectiveness of nitrite in various organs and disease states in humans," said NHLBI's Gladwin who isalso an i...
Anammox bacteria produce nitrogen gas in oceans' snackbar
...bacteria for the first time a few years ago in the oxygen
poor Black Sea and now also in the open ocean. Thi...mmox bacteria are present in the Atlantic ocean in oxygen
poor waters at ~100 m depth. The number and activity of anammox bacteria present at this depth is su...
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