Results 261 to 270 of about 3,933,717 (303)
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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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Modulation of platelet function by free radicals and free-radical scavengers
Trends in Pharmacological Sciences, 1993Platelets have the capacity to generate oxygen-derived free radicals and are often present at inflammatory foci with other free-radical-generating cells such as white blood cells. Free radicals can modify platelet adhesion and aggregation directly or through effects on the vascular endothelium, which generates prostacyclin and nitric oxide.
D, Salvemini, R, Botting
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Trends in Neurosciences, 2004
Aging is characterized by decrements in maximum function and accumulation of mitochondrial DNA mutations, which are best observed in organs such as the brain that contain post-mitotic cells. Oxygen radicals are increasingly considered responsible for part of these aging changes.
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Aging is characterized by decrements in maximum function and accumulation of mitochondrial DNA mutations, which are best observed in organs such as the brain that contain post-mitotic cells. Oxygen radicals are increasingly considered responsible for part of these aging changes.
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The need for a ?free radical initiative'
Diabetologia, 1996The article presented by Drs. Paolisso and Giugliano discusses the possible relationship between oxidative stress and insulin action. The hypothesis formulated by the authors is that oxidative stress can impair insulin action through a change in the physical state of the plasma membrane of target cells, an increase in intracellular calcium content and ...
COMINACINI, Luciano +2 more
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Seminars in Reproductive Medicine, 1998
Partial reduction of molecular oxygen can generate reactive oxygen species (ROS), including the hydrogen peroxide, and the free radicals superoxide and hydroxyl. The formation of ROS is a feature of many degenerative diseases, such as atherosclerosis and neurodegeneration, Organisms contain a battery of defense mechanisms to prevent the formation of ...
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Partial reduction of molecular oxygen can generate reactive oxygen species (ROS), including the hydrogen peroxide, and the free radicals superoxide and hydroxyl. The formation of ROS is a feature of many degenerative diseases, such as atherosclerosis and neurodegeneration, Organisms contain a battery of defense mechanisms to prevent the formation of ...
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