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Tuesday, May 12, 2020 | History

2 edition of Pulse radiolysis of iron (II) complexes. found in the catalog.

Pulse radiolysis of iron (II) complexes.

Zhongwei Zhao

Pulse radiolysis of iron (II) complexes.

by Zhongwei Zhao

  • 157 Want to read
  • 17 Currently reading

Published by University of Salford in Salford .
Written in English


Edition Notes

MSc thesis, Chemistry.

ID Numbers
Open LibraryOL20309230M

Presents a discussion of the pulse radiolysis technique, one of the important and powerful means for detecting transient and relaxation phenomena and following their behavior in irradiated systems. This book covers the principle of pulse radiolysis, identifies various kinds of pulse radiolysis techniques, and discusses advancements in the field. The influence of ion pairing on electron scavenging in nitrate solutions and the effect of amines on the enhancement of the electron yield, two particular processes previously observed in positron annihilation (PA) studies on positronium (Ps) formation in methanol, .

  1. J Am Chem Soc. Feb 1;(3) doi: /jaa Pulse radiolysis studies of alkaline iron(III) and iron(VI) solutions. Observation of transient iron complexes with intermediate oxidation by: Radiolysis is the dissociation of molecules by ionizing is the cleavage of one or several chemical bonds resulting from exposure to high-energy flux. The radiation in this context is associated with ionizing radiation; radiolysis is therefore distinguished from, for example, photolysis of the Cl 2 molecule into two Cl-radicals, where (ultraviolet or visible) light is used.

  A pulse-radiolysis study of the manganese-containing superoxide dismutase from Bacillus stearothermophilus. A kinetic model for the enzyme action. Biochem J. Jul 1; (1)– [PMC free article] Ravindranath SD, Fridovich I. Isolation and characterization of a manganese-containing superoxide dismutase from by: Radical 3 is probably inert toward this compound on the pulse radiolysis time scale. While 1 forms more» an adduct with an observable lifetime (k(dec) = {times} 10{sup 4} s{sup {minus}1}), 2 gives rise to the immediate formation of nitroform anion.


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Pulse radiolysis of iron (II) complexes by Zhongwei Zhao Download PDF EPUB FB2

Buy Pulse Radiolysis of Irradiated Systems on FREE SHIPPING on qualified orders Pulse Radiolysis of Irradiated Systems: Yoneho Tabata: : Books. Pulse Radiolysis (M.I.T. Press research monographs in radiation chemistry, 1) Hardcover – Octo by Max S. Matheson (Author)Author: Max S.

Matheson, Leon M. Dorfman. Pulse Radiolysis Hardcover – March 1, by Max S Matheson (Author) › Visit Amazon's Max S Matheson Page. Find all the books, read about the author, and more. See search results for this author. Are you an author. Learn about Author Central.

Max S Matheson (Author), Leon M Dorfman Author: Max S Matheson, Leon M Dorfman. The book covers the principle of pulse radiolysis, identifies various kinds of pulse radiolysis techniques, and discusses recent advancements in the field.

The text also discusses new experimental pulse radiolysis techniques (basic and applied) in broad scientific fields such as physics, chemistry, biology, and engineering. Pulse-radiolysis study of some unstable complexes of iron - Transactions of the Faraday Society (RSC Publishing) Pulse radiolysis of oxygen-containing solutions of ferrous perchlorate in perchloric acid (l M) enables the formation and disappearances of a ferric hydroperoxide complex, FeHO, to be observed.

The Oxidation of Amino Acids By Ferrate(V). A Pre-Mix Pulse Radiolysis Study. Free Radical Research22 (6), DOI: / Benon H.J. Bielski, Virender K. Sharma, Gidon Czapski. Reactivity of ferrate(V) with carboxylic acids: A pre-mix Pulse radiolysis of iron book radiolysis by: Organized into nine chapters, this book begins with an overview of the principle of both pulse radiolysis and flash photolysis with photoelectric detection.

This text then examines the applications of flash photolysis and pulse radiolysis to the chlorophylls, bile pigments, hemoglobin and myoglobin, and. Pulse radiolysis was developed as a technique for studying fast processes in solution about 20 years after flash photolysis, 1–4.

The initial consequences of the absorption of ionising radiation is. The final product is a precipitate of iron (III) compounds but the process of nucleation is a slow one and a “window” lasting for several miliseconds after the pulse permits optical measurements.

The first observable species in the nanosecond region is Fe (OH) aq2+ with λmax = nm and ϵ = M −1 cm − by: Tellurium(V). A Pulse Radiolysis Study.

The Journal of Physical Chemistry A(27), DOI: /jpi. Stephan J. Hug, Laura Canonica, Martin Wegelin, Daniel Gechter, and, Urs von Gunten. Solar Oxidation and Removal of Arsenic at Circumneutral pH in Iron Containing by: A pulse radiolysis study of the reactions of the hydrated electron and hydroxyl radical with the oxalate ion in neutral aqueous solution.

High Energy Chemistry42 (1), Cited by: Pulse radiolysis studies of iron(I) in aqueous solutions - Journal of the Chemical Society, Dalton Transactions (RSC Publishing) The absorption spectrum and decay kinetic of the products of the reactions of iron() ions with hydrated electrons and hydrogen atoms have been studied in aqueous solution using pule-radiolysis techniques.

Fig. Schematic drawing of a pulse radiolysis setup. The solution to be irradiated is in the cell. The electron beam (coming from the accelerator) is usually perpendicular to the analyzing light beam.

The pulse duration is usually nsec long. The sample is contained in a quartz cell ( μ l. By pulse radiolysis, we show that hydrated electrons reduce the iron(III)(cp20) 3 complex with a rate constant of k = ( ± ) × 10 10 M –1 s –1, and that the iron(II)(cp20) 3 complex aquates rapidly.

The dissociation of the first two CP20 molecules takes place within a few μs after the by: 6. Pulse radiolysis is a powerful method for generating highly reduced or oxidized species and free radicals.

Combined with fast time-resolved spectroscopic measurement, we can monitor the reactions of intermediate species on time scales ranging from picoseconds to seconds. The application of pulse radiolysis to water generates hydrated electrons (eaq–) and specific radicals, rendering this Author: Kazuo Kobayashi.

Abstract. This chapter describes pulse radiolysis. Pulse radiolysis uses pulsed particle (mostly electron) beam having the time width in the order of sub-microseconds (10 −6) to sub-picoseconds (10 −12).Typically, it is used for liquid systems, and upon irradiation, short-lived chemical species such as electron, cation, and electronically excited states are formed.

Progress report, December 1, Novem }, author = {Chevion, M and Ilan, Y A and Samuni, A and Navok, T and Czapski, G}, abstractNote = {The pulse-radiolysis of solutions of adult human methemoglobin was used in order to reduce a single heme-iron within the protein tetramers.

The valence-hybrids thus formed were reacted with oxygen. A pulse-radiolysis study of the catalytic mechanism of the iron-containing superoxide dismutase from Photobacterium by:   Organized into nine chapters, this book begins with an overview of the principle of both pulse radiolysis and flash photolysis with photoelectric detection.

This text then examines the applications of flash photolysis and pulse radiolysis to the chlorophylls, bile pigments, hemoglobin and myoglobin, and the Edition: 1.

Iron() complexes of tryptophan and histidine, as models of some metallo-enzymes, have been oxidised by Br in the pH range 7– For the tryptophan complex, the rate of oxidation is controlled by the ligand through the formation of metal-complexed by: 7. The technique of pulse radiolysis 1–4 is very similar to that of flash photolysis although it was first introduced about a decade later.

Pulse radiolysis consists of the delivery of a very short intense pulse of ionizing radiation to a sample, the resultant changes in light absorption of the sample being followed by very fast spectrophotometry.The radical anion, Br 2 ˙–, a strong one-electron oxidant, has been used to oxidise iron(II)–imidazole, Fe II –ImH, and iron(II)–bis(imidazolyl)methane, Fe II –2-BIM, complexes in aqueous solution, the latter being regarded as good models of the iron(II) site in non-haem iron-containing enyzmes such as rates of oxidation of Fe II –lmH, Fe II (ImH) 2, Fe–2-BIM.Using the pulse-radiolysis technique, nitric oxide (NO) was produced by the reaction of an hydrated electron with NO.

This was verified by the formation of the NO complex of iron() myoglobin (Mb) after pulse radiolysis of iron() myoglobin in the presence of Cited by: