Tag: "reactive" at biology news
DFG awards 2005 Heinz Maier-Leibnitz Prize
...d IgE receptors that connect the antibodies to the reactive
cells and send the signals that cause reactions like itching or sneezing. The work of the Austrian-Croatian researcher is not only a significant contribution to allergy research; it also has real practical applications. Since 2003, Natalija Novak has...
Chemical compounds present in diet increase risk of colon cancer
...ff the activation 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 ...
JCI table of contents May 1, 2005
... called NOS3, 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 prev...
Scientists discover how plants disarm the toxic effects of excessive sunlight
...lternate form of singlet oxygen, which is a highly reactive
and toxic substance that destroys biological molec...emselves from singlet oxygen, says Donohue. Other reactive
oxygen species - often called "free radicals" - are thought to be at the root of many debilitating d...
JCI table of contents June 1, 2005
...lls and found that UM-CLL B cells expressed highly reactive
antibodies whereas most M-CLL B cells did not. They conclude that both UM-CLLs and M-CLLs actually originate from common B cell precursors and that the mutations play an important role in the development of the disease by altering original BCR autor...
Food fried in vegetable oil may contain toxic compound
...The toxicity arises because the compound is highly reactive
with proteins, nucleic acids--DNA and RNA--and other biomolecules. HNE is formed from the oxidation of linoleic acid, and reports have related it to several diseases, including atherosclerosis, stroke, Parkinson's, Alzheimer's, Huntington's and liver...
Researchers extend mouse lifespan by protecting against free radicals
...al theory of aging. The theory suggests that very reactive
chemicals, called "free radicals," can be damaging to the body at the cellular level. Those reactive
chemicals can take part in unnecessary chemical reactions that can damage the cell components, inclu...
Atmosphere may cleanse itself better than previously thought
...ncisco said. "For that, the atmosphere relies on a reactive
group of chemicals called OH radicals that attach ... tough to get a handle on them because they are so reactive
- which means they vanish fast - and also because we don't have complete knowledge of all the source...
NJIT plastics expert who develops safer explosives for soldiers gets honor
... advancing the practice of mixing, compounding and reactive
processing. (Editors: To interview Gogos in his lab, call Sheryl Weinstein, 973-596-3436.) Gogos currently leads a $2.5 million research program at NJIT funded by the U.S. Department of Defense (DOD) to develop new manufacturing technologies for ex...
Polymer expert writes text about better, inexpensive ways to create plastic
...rally occur in salts and glasses which are surface reactive
inorganic compounds. When such compounds are com...ams. He is involved with polymer modification and reactive
processing, plastics recycling and life-cycle assessment. Structure-property relationships and env...
A radical solution for environmental pollution
...toral fellow Chunhua Qiao. Free radicals---highly reactive
chemical species that have been implicated in agin...izing these very inert compounds is to harness the reactive
chemistry of free radicals. To a chemist it's an elegant solution to a difficult problem---even if w...
From memory formation during sleep to novel components for physics
... surfaces of particles and solids interacting with reactive
plasmas. (Spokesperson: Prof. Jrgen Meichsner, Ernst Moritz Arndt University of Greifswald) Engineering Sciences The project "Gentelligent building blocks in the life cycle the use of hereditary component-inherent information in manufacturing" ai...
Studies reveal how cells sense oxygen
...ygen. Byproducts of mitochondrial activity, called reactive
oxygen species or free radicals, signal low oxygen...oxygen in tissues. Earlier findings suggested that reactive
oxygen species generated by mitochondria under low oxygen conditions regulate a variety of hypoxic r...
Cell's power plants also sense low oxygen
... low oxygen, mitochondria produce chemicals called reactive
oxygen species (ROS) -- such as hydrogen peroxide -- that trigger the activity of HIF. However, other researchers had performed experiments that argued against a mitochondrial role in oxygen sensing. They showed that enzymes called prolyl hydroxylase...
Researchers discover gene that determines asthma susceptibility by regulating inflammation
...to the airways. These "inflammatory" cells release reactive
oxygen species (ROS), causing the airway lining to swell and restrict. ROS is thought to cause lung tissue damage as well. ROS levels are normally offset by antioxidants in non-asthmatics. Recently, researchers have been hunting for novel genes that ...
Cancer comes full circle
...cancers. Rac1b stimulates the production of highly reactive
oxygen molecules, which promote cancer in two ways...nduced by Rac1b trigger the formation of extremely reactive
molecules known as reactive
oxygen species, or ROS. In turn, the increased amount of ROS activates k...
Elderly mice yield clues to the process of growing old
... that change prompts cells to produce fewer of the reactive
free radical molecules. The symptoms of aging become pronounced with the loss of some critical cells, notably adult stem cells from some tissues and that are essential for replacing cells that die. "If these stem cells are lost, tissue structure an...
Bacteria feed on smelly breath (and feet)
...hat are linked to bad breath. These smelly, highly reactive
'one-carbon' compounds are naturally produced from the breakdown of sulphur-containing amino acids in the mouth. Dr Ann Wood and her colleagues at Kings College, London, reported these findings in the August issue of Environmental Microbiology. The o...
Amazon source of 5-year-old river breath
... is dynamic, which could make the system much more reactive
to deforestation and climate change." For example, data from a region of active deforestation in the southern Amazon already shows that the carbon leaving rivers has an identifiable isotopic signature of pasture grasses. "You're changing the land u...
RPE meets EPR
... inside cells in the retina to soak up and destroy reactive
oxygen species. Reactive oxygen species, or free radicals, energized by light, are thought to play a major role in macular degeneration, the leading cause of blindness in people over the age of 60. "We now have the first persuasive evidence that mel...
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