Tag: "oxygen" at biology news
Cigarette smoke causes breaks in DNA and defects to a cell's chromosomes, Pitt study finds
...omosome instability is most likely due to reactive oxygen
species that form as the cell is exposed to the va...ioxidants, agents that block formation of reactive oxygen
species, prevented most occurrences of anaphase bridge formation and significantly reduced genomic i...
Belgian researchers explore revolutionary approach to angiogenesis
...ntly because the increased blood flow carried more oxygen
to the tumour." Dr. Feron, who is an assistant professor and research associate in the Department of Internal Medicine at the University of Louvain, said that the team was now planning to start Phase I clinical trials in patients. "The chances for th...
'Dead zone' area shrinking, Texas A&M prof says
... the northern Gulf of Mexico that suffers from low oxygen
and results in huge marine losses - and much to th...xic - a technical term for extremely low dissolved oxygen
concentrations in water - had broken up and appeared to pose little threat to marine life, while in ...
Cardiac arrest may hinder ability to learn certain tasks
...t plays a role in memory and navigation. A lack of oxygen
during a severe attack one where the victim stops...in cardiac arrest enough time to stop the flow of oxygen
to the brain. Prior to surgery, the animals navigated the Morris water maze a task that requi...
Gene clusters predict atherosclerosis severity, susceptibility
...which over time can deprive the heart of necessary oxygen
and nutrients. While factors such as diet, smoking, cholesterol levels and inactivity are important in the development of atherosclerosis, the researchers said that heredity plays a crucial role in how the body responds to these environmental factors...
16 APS exercise research highlights, from reduced flu mortality to proteomics & obesity
... won for his work on increased muscle activity and oxygen
diffusion. Christensen would later become famous f...ers that diffusion can account for the transfer of oxygen
in the lung." Completing the circle, Saltin and several collaborators published an article on alti...
Rice finds 'on-off switch' for buckyball toxicity
...ed via physical disruption of the cell membrane by oxygen
radical species generated by the buckyballs. Colvin and her colleagues emphasize that the study only fills in part of the puzzle regarding fullerene toxicity. For example, because cytotoxic studies look only at cells in culture, they don't tell scien...
Environmental decontamination, greenhouse gases, and the genome of a methane-loving bacterium
...en, and sulfur-and appears able to survive reduced oxygen
levels. The M. capsulatus genome provides a platform for investigating the details of methanotroph biology and its potential as a biotech workhorse. It may also guide efforts to harness this bacterium's penchant for methane to reduce global gree...
New way to protect brain from stroke damage
...ll damage to a rise in brain acidity following the oxygen
depletion, or ischemia, characteristic of stroke. ...to the influx of calcium in nerve cells starved of oxygen
and subjected to acidic conditions. That calcium overload, long attributed to another group of cellu...
Washington University in St. Louis leads group studying aging process
... are organisms that gave rise to chloroplasts, the oxygen
factory in plant cells. A half billion years ago ...ellular plants and functioned in a world where the oxygen
level of the biosphere was much less than it is today. Over its very long life span, cyanobacteria ...
Two Virginia Tech energy-related inventions win R&D 100 awards
... pass through the membrane film, then combine with oxygen
to create a environmentally neutral water byproduct. PEM fuel cells can be integrated into stacks to provide from .001 up to 250 kW of power, Vijayendran explained in the R&D 100 entry. Large units could be used in autos and homes but McGrath says...
Story tips from the Department of Energy's Oak Ridge National Laboratory, September 2004
...formation from a simple structural motif with four oxygen
atoms surrounding a germanium atom to a high-density six oxygen
atom motif that had never been fully characterized. The researchers used intense beams of X-rays and...
Long-term effects of carbon monoxide poisoning are an autoimmune reaction
...nt agents, in conjunction with standard hyperbaric oxygen
therapy," he says. "Until our study elucidated this immune response, we had no motivation to think along those lines." Penn colleagues on the paper are: Veena M. Bhopale, Donald Fisher, Jie Zhang, and Phyllis Gimotty. This study was funded by the Nat...
Natural mineral locks up carbon dioxide
...hydroxide -- is composed of magnesium, silicon and oxygen
and is plentiful. He researchers used material from the Cedar Hills quarry on the Pennsylvania/ Maryland border for this study, but the mineral is available in large quantities in many places. The U.S. deposits of the minerals that can be used for t...
Green tea research leads to gum and other products
...reen tea polyphenol called EGCG increases reactive oxygen
species, or ROS, a form of oxidative stress in oral cancer cells. "Cells with abnormally high levels of ROS become damaged," he said. "If the level is very high, the cells will be killed. On the other hand, ROS is brought to background levels by EGCG...
NASA satellites detect 'glow' of plankton in black waters
...cteria. The bacteria consume the algae and deplete oxygen
from the water that leads to fish kills. Chuanmin Hu and Frank Muller-Karger, oceanographers at the College of Marine Science of University of South Florida, St. Petersburg, Fla., used fluorescence data from NASA's Moderate Resolution Imaging Spectro...
APS awards more than $140,000 to minority students of physiology
...odel, Mr. Garcia is studying the effects of excess oxygen
on electrical signaling in the central nervous sys...elp elucidate the neural mechanism that causes CNS oxygen
toxicity. CNS oxygen
toxicity is a potential health problem for hyperbaric oxygen
therapy patients ...
Meteorites supplied Earth life with phosphorus
..., there's a single phosphorus atom for every 1,400 oxygen
atoms in the cosmos, every 25 million oxygen
atoms in the oceans, and 72 oxygen
atoms in bacteria. The numbers for carbon atoms and nitrogen atom...
Light turns on anticancer agents
...agents have required oxygen. Yet, tumors are often oxygen
depleted. Now, Virginia Tech researchers have developed light-activated therapy agents that are oxygen
independent. The research will be presented at the 228th American Chemical Society National Meeting...
JGI announces community sequencing program portfolio
...icrobial growth resulting in eutrophication, where oxygen
in the water is depleted and fish and other organisms residing in the habitat die. Alvinella pompejana, the marine Pompeii worm, which has adapted to thrive at super-hot hydrothermal vents. Prochlorococcus, marine phytoplankton that plays a criti...
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