INTERACTION OF HYDROGEN ATOMS AND HYDROXYL RADICALS WITH 5-HALOGEN URACILS

study of dna interaction with ethylenediaminetetraacetic acid and sesamol food additives

برهمکنش dnaتیموس گاوی طبیعی (ct-dna) با اتیلن دی آمین تترااستات (edta)در بافرtris-hcl با 8/7 ph ( دراین ph،edta به نمک دی سدیم تبدیل می شود) وسسامول در بافر tris-hcl با4/7 ph مورد بررسی قرار گرفته است. edta و سسامول استفاده فراوانی در تکنولوژی غذایی و صنعت شیمیایی دارند. مدل اتصال dna مربوط بهedta بوسیله اسپکتروفتومتری جذب، دورنگ نمایی حلقوی(cd)، ویسکومتری وژل الکتروفورز بررسی شده است. طیفuv ...

Hydrogen peroxide-induced cardiovascular reflexes. Role of hydroxyl radicals.

Mesenteric ischemia reflexly activates the cardiovascular system. In addition, mesenteric ischemia and reperfusion generate reactive oxygen species. However, the ability of these short-lived reactive oxygen species to generate cardiovascular reflexes is unknown. We therefore investigated cardiovascular reflexes induced by serosal application of hydrogen peroxide (H2O2) to the gallbladder, stoma...

Critical Review of Rate Constants for Reactions of Hydrated Electrons, Hydrogen Atoms and Hydroxyl Radicals (.OH/.O−) in Aqueous Solution

George V. Buxton University of Leeds, Cookridge Radiation Research Centre, Leeds, LS16 6QB, England and Clive L. Greenstock Medical Biophysics Branch, Whiteshell Nuclear Research Establishment, Atomic Energy of Canada Limited Research Company, Pinawa, Manitoba, Canada, ROE 1LO and W. Phillip Helman and Alberta B. Ross Radiation Chemistry Data Center, Radiation Laboratory, University of Notre Da...

Theoretical study of reaction of trifluoromethyl radical with hydroxyl and hydrogen radicals

Evidence against the generation of free hydroxyl radicals from the interaction of copper,zinc-superoxide dismutase and hydrogen peroxide.

Prior spin trapping studies reported that H(2)O(2) is metabolized by copper,zinc-superoxide dismutase (SOD) to form (.)OH that is released from the enzyme, serving as a source of oxidative injury. Although this mechanism has been invoked in a number of diseases, controversy remains regarding whether the hydroxylation of spin traps by SOD is truly derived from free (.)OH or (.)OH scavenged off t...