Last edited by Sakinos
Thursday, July 30, 2020 | History

5 edition of Peroxyl radicals found in the catalog.

Peroxyl radicals

  • 17 Want to read
  • 10 Currently reading

Published by Wiley in Chichester, New York .
Written in English

    Subjects:
  • Peroxides.,
  • Radicals (Chemistry)

  • Edition Notes

    Includes bibliographical references and index.

    Statementedited by Zeev B. Alfassi.
    SeriesThe chemistry of free radicals
    ContributionsAlfassi, Zeev B.
    Classifications
    LC ClassificationsQD305.E7 P395 1997
    The Physical Object
    Paginationx, 535 p. :
    Number of Pages535
    ID Numbers
    Open LibraryOL995425M
    ISBN 100471970654
    LC Control Number96034040

    Title:Effects of Peroxyl Radicals on Contractility of Rabbit Aorta and Guinea Pig Atria VOLUME: 13 ISSUE: 4 Author(s):Ilaria Peluso, Luca Romanelli, Husseen Manafikhi and Maura Palmery Affiliation:Department of Physiology and Pharmacology "V. Erspamer", "Sapienza" University of Rome, Aldo Moro 5, Rome, Italy. Keywords:Acute vasodilatation, alkalinization, in . In order to further understand such protection, pulse radiolysis was used to generate peroxyl radicals and the reactions between the retinoids and peroxyl radicals were monitored in aqueous micelles. In all cases, at least two products were detected—the retinoid radical cation (absorbing near nm) and species absorbing at shorter.

    Oxidation mechanisms of methionine containing peptides by hydroxyl and peroxyl radicals. In K. E. Davies (Ed.), Oxidative damage and repair. Chemical, biological, and medical aspects (pp. ). Pergamon Press. In the oxygenated systems, adduct radicals of pyrimidines are converted into corresponding peroxyl radicals in diffusion-controlled reactions with oxygen:Pyr +O 2 PyrO 2 Hydroxyl radicals reacts with purines at diffusion-controlled rates ( x 10 9 M-1 s-1) (von Sonntag ). Addition to C4-, C5- and C8-positions results in equal amounts of.

    Peroxyl radicals are formed in biological systems, the atmosphere and aqueous waste and are important intermediates in the breakdown both of organic molecules and several inorganic species. As peroxyl radicals react with CFCs and HFCs in the atmosphere resulting in the further destruction of the ozone layer, there has been a great deal of. For example, alcohols have a double effect on the reaction rate between the phenol and the peroxyl radical. On the one hand, the alcohols act as acceptors of hydrogen bonds. On the other hand, they favor the ionization of the phenols to anion phenoxides, which can react rapidly with the peroxyl radicals, through an electron transfer.


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Peroxyl radicals Download PDF EPUB FB2

Peroxyl Radicals is essential reading for organic and physical organic chemists, biochemists and environmental technologists. About the Author Zeev B. Alfassi is the editor of The Chemistry of Free Radicals: Peroxyl Radicals, published by Wiley. Formation of peroxyl radicals in solution / Zeev B.

Alfassi --Methods of preparing organic peroxy radicals for laboratory studies / Ole J. Nielsen and Timothy J. Wallington --Structure of organic peroxyl radicals / L.R.C. Barclay --The thermochemistry of peroxides and polyoxides, and their free radicals / S.W. Benson and N.

Cohen --Ultaviolet. Free radicals, which are key intermediates in many thermal, photochemical and radiation processes, are important for a proper understanding of fundamental natural processes and the successful development of organic syntheses.

Volume II/18 serves as a supplement and extension to volume II/13 and Book Title Peroxyl and Related Radicals. ISBN: OCLC Number: Description: x, pages: illustrations ; 24 cm. Contents: Formation of peroxyl radicals in solution / Zeev B. Alfassi --Methods of preparing organic peroxy radicals for laboratory studies / Ole J.

Nielsen and Timothy J. Wallington --Structure of organic peroxyl radicals / L.R.C. Barclay --The thermochemistry. Oxyl- Peroxyl- and Related Radicals / Oxy- Peroxy- und verwandte Radikale.

Authors: Howard, J.A., Scaiano, : Springer-Verlag Berlin Heidelberg. TOWARDS WATER-SOLUBLE PEROXYL RADICAL CLOCKS By Jassimranjeet Dhanoa A thesis submitted to the Department Peroxyl radicals book Chemistry in conformity with the requirements for the degree of Master of Science conditions, forming an alkoxyl and acyloxyl radical, the latter of which rapidly.

You can read Oxyl- Peroxyl- And Related Radicals / Oxy- Peroxy- Und Verwandte Radikale (Landolt-Bornstein: Numerical Data And Functional Relationships In Science And Technology - New Series) PDF ePub in house terrace in the morning, when the air is still fresh with a cup of coffee or sweet tea.

among the best peroxyl-radical trapping antioxidants known, having inhibition rate constants ca. fold greater than the current industry standard. Through a series of mechanistic studies (measuring Arrhenius parameters, kinetic solvent effects, deuterium kinetic isotope effects and.

Peroxyl radicals (ROO•), formed by reactions of molecular oxygen with carbon-centered radicals, are far more stable than either the carbon-centered radical or the related alkoxyl radicals (RO•). Peroxyl radicals typically have t 1/2 of 7 s at 37 °C and can thus diffuse moderate distances in biological systems.

Organic hydroperoxides (ROOH. Author Bios. Philippe Renaud and Mukund P. Sibi are the authors of Radicals in Organic Synthesis, published by Wiley. Peroxyl radical. Identifiers The hydroperoxyl radical, also known as the perhydroxyl radical, is the protonated form of superoxide with the chemical formula HO 2.

This species plays an important role in the atmosphere and, as a reactive oxygen species, in cell y (pK): Purchase Oxidative Stress - 1st Edition. Print Book & E-Book. ISBNSchulte-Frohlinde D, Behrens G, Önal A () Lifetime of peroxyl radicals of poly(U), poly(A) and single-and double-stranded DNA and the rate of their reaction with thiols.

Int J Radiat Biol – Google Scholar. Spin trapping of polyunsaturated fatty acid-derived peroxyl radicals: reassignment to alkoxyl radical adducts. Free Radical Biology and Medicine30 (2), DOI: /S(00) The peroxyl radical chemistry occurring in this medium is often very different from that observed in the gas phase or in organic solvents.

In spite of the great importance of these reactions in medicine (for example in anti‐cancer irradiation therapy and ischaemia) there have been comparatively few studies of peroxyl reactions in aqueous media.

Wallington, TJ & Nielsen, OJPeroxy radicals and the atmosphere. in ZB Alfassi (ed.), Peroxyl radicals. Wiley, Chichester, The Chemistry of Free Radicals, pp.

Peroxy radicals are central to ozone photochemistry in the troposphere and lower stratosphere. The simplest of the family, HO 2, interconverts readily with OH on a time scale of seconds.

HO 2 + NO Æ OH + NO 2. OH + CO (+ O 2) Æ HO 2 + CO 2. Organic peroxy radicals are formed in the oxidation of hydrocarbons and other organic molecules.

Other articles where Peroxy radical is discussed: food preservation: Autoxidation: oxygen (O2) to form a peroxy radical (LOO ).

The peroxy radical removes a hydrogen atom from another lipid molecule and the reaction starts over again (propagation). During the propagation steps, hydroperoxide molecules (LOOH) are formed that may break down into alkoxy (LO ) and peroxy radicals.

The peroxyl radical scavenging activity of piceatannol has been studied in aqueous and lipid solutions, using the density functional theory, and compared to that of its structural analogue resveratrol.

The following mechanisms of reaction have been considered: hydrogen transfer (HT), single electron transfer. Peroxyl and alkoxyl radicals. Peroxyl (ROO) and alkoxyl (RO) radicals are good oxidizing agents, having more than mV of standard reduction potential.

Irradiation of UV light or the presence of transition metal ions can cause hemolysis of peroxides to produce peroxyl and alkoxyl radicals. This item: The Chemistry of Free Radicals: Peroxyl Radicals. S-Centered Radicals (Hardcover $) The Chemistry of Free Radicals: N-Centered Radicals (Hardcover $1,) Organosilanes in Radical Chemistry (Hardcover $) The Chemistry of Free Radicals: Peroxyl Radicals (Hardcover $).Abstract.

Peroxyl radicals are intermediates in the generation of hydroperoxides and are products of their metabolism. Peroxyl radicals possess a unique combination of reactivity and selectivity that enables them to diffuse to remote cellular loci and to oxidize cellular constituents to intermediates that may play a role in toxicity and carcinogenicity.Herein, we describe the synthesis of a fluorescent probe NB-2 and its use for the detection of peroxyl radicals.

This probe is composed of two receptor segments (4-hydroxycinnamyl moieties) sensitive towards peroxyl radicals that are conjugated with a fluorescent reporter, dipyrrometheneboron difluoride (BODIPY), whose emission changes depend on the oxidation .