(v.) A person whose employment is to clean the streets of a city, by scraping or sweeping, and carrying off the filth. The name is also applied to any animal which devours refuse, carrion, or anything injurious to health.
Example Sentences:
(1) These membrane perturbation effects not observed with bleomycin-iron in the presence of a hydroxyl radical scavenger, dimethyl thiourea, or a chelating agent, desferrioxamine, were correlated with the ability of the complex to generate highly reactive oxygen species.
(2) The role of O2 free radicals in the reduction of sarcolemmal Na+-K+-ATPase, which occurs during reperfusion of ischemic heart, was examined in isolated guinea pig heart using exogenous scavengers of O2 radicals and an inhibitor of xanthine oxidase.
(3) This may be due to DMSO's ability to scavenge free radicals.
(4) As calls grew to establish why nobody stepped in to save Daniel, it was also revealed that the boy's headteacher – who saw him scavenging for scraps – has not been disciplined and has been put in charge of a bigger school.
(5) It may be due to relative nonreactivity of ascorbic acid free radical that free radical chain reactions, found commonly in radical chemistry, do not occur in the scavenging reaction by ascorbic acid.
(6) The free radical scavengers mannitol, thiourea, benzoate, and 4-methylmercapto-2-oxobutyrate protected either native cells exposed to H2O2 or pretreated hepatocytes exposed to H2O2 and given ferric or ferrous iron.
(7) Also skeletal muscle necrosis can be reduced if these scavengers are provided in high concentration during reperfusion.
(8) The oxygen-free radical scavengers thiourea, mannitol and catalase prevented toxicity mediated by ferrous ammoniumsulphate but not by ferrous ascorbate (molar ratio of 1:20).
(9) On the basis of these results it is suggested that (+)-cyanidanol-3 treatment protects brain suspensions against lipid peroxidation by acting as a free radical scavenger in vitro.
(10) However, two observations suggested that surface epithelial loss alone was not sufficient to trigger the proliferative response to DOC: intracolonic instillation of DOC followed by removal of the DOC solution at 1 h, at which time surface epithelial loss was maximal, did not result in an increase in ornithine decarboxylase activity or [3H]dThd incorporation into DNA when these parameters were assessed at 4 h or 12 to 48 h, respectively; phenidone, an antioxidant and radical scavenger, and bis[(3,5-diisopropyl-salicylato) (O,O) copper(II), a lipophilic agent with superoxide dismutase activity, abolished the DOC mediated proliferative response but did not prevent the early loss of surface cells.
(11) The theoretical calculations refer to a simple aqueous system containing DNA molecules and scavenger (Tris).
(12) The sulfhydryl enzyme malate synthase was inactivated by X-irradiation in air-saturated aqueous solution, in the absence or presence of a variety of additives (thiols, antioxienzymes, typical radical scavengers, inorganic salts, buffer components, substrates, products, analogues).
(13) Thus, GSH appears to suppress the toxicity of 6-OH-DA, probably by scavenging the toxic species formed during 6-OH-DA oxidation.
(14) Under physiological conditions the platelet 5HT-system may have a role as a scavenger for free extracellular 5HT and in hemostasis.
(15) Our model is a development of previous models, but differs in several respects: the overall activity is assumed to be dependent on the error level, the effect of errors in the translating system, giving rise to additional errors in the succeeding generation of products, is explicitly included as a special term in our model, and scavenging enzymes are assumed to break down and eliminate products with a loose structure.
(16) The radiobiological effect of alcohols is normally attributed either to radical scavenging or to oxidation.
(17) The present work reviews the evidence for an involvement of free radicals in the pathophysiology of chronic pancreatitis and the potential of treatment with antioxidant and scavenger substances.
(18) In models of prolonged ischemia (2 hours) followed by reperfusion, we have not observed a beneficial effect of scavengers on stunned myocardium.
(19) Formation of 2,5-DHB was inhibited by CO, metyrapone and SKF-525A, but not by the .OH scavengers mannitol and formate or by the iron chelator desferrioxamine.
(20) The pharmacologic modification of this injury process, with agents that scavenge these reactive oxygen metabolites, block their generation, or enhance the endogenous antioxidant capability, has shown great promise in animal models of common clinical conditions, and has already been successfully applied in controlled clinical trials.