Journal ArticleDOI
Re-evaluation of the thiocyanate dosimeter for pulse radiolysis
George V. Buxton,Craig R. Stuart +1 more
TLDR
In this article, the super-Fricke dosimeter was used as a secondary standard for the thiocyanate dosimeter in O2-saturated water and the results were improved to 3.47 ± 0.06.Abstract:
The thiocyanate dosimeter (10–2 mol dm–3 SCN– in O2-saturated water) has been standardised against the super-Fricke dosimeter (10–2 mol dm–3 FeII in O2-saturated 0.4 mol dm–3 H2SO4) using the hexacyanoferrate(II) dosimeter [5 × 10–3 mol dm–3 Fe(CN)64– in O2-saturated water] as a secondary standard. On the basis that G(FeIII)= 1.67 × 10–6 mol J–1 and IµFeIII= 220.4 m2 mol–1 at 304 nm and 25 °C in the super-Fricke dosimeter, we obtain GIµ[Fe(CN)63–]=(3.47 ± 0.06)× 10–5 m2 J–1 at 420 nm and GIµ(SCN)2˙–=(2.59 ± 0.05)× 10–4 m2 J–1 at 475 nm. These values remain unchanged when the solutions are saturated with air instead of O2 and are doubled in N2O-saturated solution.read more
Citations
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Journal ArticleDOI
Ultraslow thermoresponse in hydrogels synthesized with radiation technique
Akihiro Hiroki,Yasunari Maekawa,Ryoichi Katakai,Takashi Yamashita,Yusa Muroya,Yosuke Katsumura,Masaru Yoshida +6 more
TL;DR: In this paper, it was shown that the shrinking speed of hydrogels prepared in aqueous alcohol is 1000 times slower than that of the hydrogel prepared in pure water, and that the ratio between the two periods depends on the alcohol molecules in the solution.
Journal ArticleDOI
Pulse radiolysis studies of 3,5-dimethyl pyrazole derivatives of selenoethers.
TL;DR: The reaction of trichloromethyl peroxyl radical, glutathione, and ascorbic acid further support their antioxidant behavior and has implication in understanding their antioxidant activity.
Book ChapterDOI
Complete β-Lactam Antiobiotic Activity Removal from Wastewaters: Hydroxyl Radical-Mediated Oxidation Efficiencies
TL;DR: In this paper, the authors quantitatively determined the efficiency of only hydroxyl radical reactions with multiple β-lactam antibiotics, with these radicals generated by radiolysis and activity measured using Staphylococcus aureus bacterial growth.
Journal ArticleDOI
Charge transfer across the Cr2O3, Fe2O3, and ZrO2 oxide/water interface: A pulse radiolysis study
TL;DR: In this paper, a pulse radiolysis study was conducted in order to observe the generation and decay kinetics of hydrated electrons in water in the presence of metal oxides, with Fe2O3 retarding the decay rate and ZrO2 increasing the decay ratio.
References
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Journal ArticleDOI
Critical Review of rate constants for reactions of hydrated electrons, hydrogen atoms and hydroxyl radicals (⋅OH/⋅O− in Aqueous Solution
TL;DR: In this article, the rate constants for over 3500 reaction are tabulated, including reaction with molecules, ions and other radicals derived from inorganic and organic solutes, and the corresponding radical anions, ⋅O− and eaq−, have been critically pulse radiolysis, flash photolysis and other methods.
Journal Article
Critical review of rate condtants for reaction of hydrated electrons, hydrogen atoms and hydroxyl radicals in aqueous solution
Journal ArticleDOI
Yield for the scavenging of hydroxyl radicals in the radiolysis of nitrous oxide-saturated aqueous solutions
TL;DR: In this article, the thiocyanate dosimeter was calibrated against the Fricke system to obtain a value of 46,400 +-600 (molecules/100 eV) for the product of yield and extinction coefficient of (SCN)/sub 2/O-saturated solutions.
Journal ArticleDOI
Track effects in radiation chemistry. Concentration dependence for the scavenging of hydroxyl by ferrocyanide in nitrous oxide-saturated aqueous solutions
TL;DR: In this paper, the radiation chemical yield for oxidation of ferrocyanide by OH produced in the fast electron radiolysis of N/sub 2/O-saturated aqueous solutions was found to increase from a low concentration limiting yield of 5.2 to values in excess of 6.7.