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Photoionization of Free Radicals
International Journal of Radiation Applications and Instrumentation. Part C. Radiation Physics and Chemistry, 1974Since this is the first lecture at this Institute on photoionization and free radicals, permit me to take a few minutes to outline my concept of these terms.
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Journal of Pharmacological and Toxicological Methods, 1993
Because of the molecular configuration, most free radicals are highly reactive and can cause cell injury. Protective mechanisms have evolved to provide defense against free-radical injury. Any time these defense systems are overwhelmed, such as during disease states, cell dysfunction may occur.
N, Kaul +4 more
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Because of the molecular configuration, most free radicals are highly reactive and can cause cell injury. Protective mechanisms have evolved to provide defense against free-radical injury. Any time these defense systems are overwhelmed, such as during disease states, cell dysfunction may occur.
N, Kaul +4 more
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Free Radicals in the Atmosphere
Free Radical Research Communications, 1987Like the oxidation in a flame, the oxidation in the atmosphere is mediated by free radicals. Unlike a flame, however, atmospheric oxidation needs an external source of energy: the sun light. In fact the most important radical acting in the lower atmosphere, the hydroxyl radical, OH, is produced following the UV-photolysis of ozone, O3, which yields an ...
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1977
A free-radical reaction is a chemical process in which molecules having unpaired electrons are involved. The radical species could be a starting compound or a product, but in organic chemistry, the most common cases are reactions that involve radicals as intermediates.
Francis A. Carey, Richard J. Sundberg
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A free-radical reaction is a chemical process in which molecules having unpaired electrons are involved. The radical species could be a starting compound or a product, but in organic chemistry, the most common cases are reactions that involve radicals as intermediates.
Francis A. Carey, Richard J. Sundberg
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The British Journal of Radiology, 2001
Mention medical imaging and most radiologists and medical physicists will think of CT, MRI, ultrasound and nuclear medicine, the techniques that form the backbone of diagnostic radiology. Nevertheless, there are a number of other methods currently under development that are potentially capable of producing extremely valuable functional information. One
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Mention medical imaging and most radiologists and medical physicists will think of CT, MRI, ultrasound and nuclear medicine, the techniques that form the backbone of diagnostic radiology. Nevertheless, there are a number of other methods currently under development that are potentially capable of producing extremely valuable functional information. One
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1986
It is now clear that free radical intermediates often are involved in the activation of many types of procarcinogens and promutagens to their active forms as well as in the binding of these activated species to DNA. In this chapter, a general introduction to free radical chemistry is presented, with some discussion of radical lifetimes and reactivities.
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It is now clear that free radical intermediates often are involved in the activation of many types of procarcinogens and promutagens to their active forms as well as in the binding of these activated species to DNA. In this chapter, a general introduction to free radical chemistry is presented, with some discussion of radical lifetimes and reactivities.
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Endometriosis and Free Radicals
Gynecologic and Obstetric Investigation, 1999Recent studies have shown that synthase for nitric oxide or scavenger enzymes is distributed throughout the endometrium. We have reported that endothelial nitric oxide synthase, originally identified in vascular endothelial cells, is distributed in glandular epithelial cells in the endometrium, peaking in the midsecretory phase.
H, Ota +3 more
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Free Radical Biology and Medicine, 2013
Unlike bigger and more advanced animals, Caenorhabditis elegans does not generate NO, yet it was recently found that NO produced by chemical or biological sources exerts profound effects in that animal, leading to increased life span and thermotolerance. The biological source was Bacillus subtilis, a natural food for C. elegans.
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Unlike bigger and more advanced animals, Caenorhabditis elegans does not generate NO, yet it was recently found that NO produced by chemical or biological sources exerts profound effects in that animal, leading to increased life span and thermotolerance. The biological source was Bacillus subtilis, a natural food for C. elegans.
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Free Radicals and Carcinogenesis
Free Radical Research Communications, 1990The role of free radicals and active states of oxygen in human cancer is as yet unresolved. Various lines of evidence provide strong but inferential evidence that free radical reactions can be of crucial importance in certain carcinogenic mechanisms. A central point in considering free radical reactions in carcinogenesis is that human cancer is really ...
B D, Goldstein, G, Witz
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Free Radical Biology and Medicine, 1988
The role of active oxygen species in diabetes is discussed in this review. Type I diabetes is caused by destruction of the pancreatic beta cells responsible for producing insulin. In humans, the diabetogenic process appears to be caused by immune destruction of the beta cells; part of this process is apparently mediated by white cell production of ...
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The role of active oxygen species in diabetes is discussed in this review. Type I diabetes is caused by destruction of the pancreatic beta cells responsible for producing insulin. In humans, the diabetogenic process appears to be caused by immune destruction of the beta cells; part of this process is apparently mediated by white cell production of ...
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