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Electrochemical oxidation of salicylhydroxamic acid on Pt electrode

Abstract

The electrochemical oxidation behavior of salicylhydroxamic acid (SHAM) on a Pt electrode was investigated in aqueous solution of different pHs, containing 10 mM of SHAM, at 25°C, by cyclic voltammetry technique. The results indicate that the SHAM was oxidized more easily in alkaline medium than acidic and neutral mediums, and the oxidation peaks of SHAM shifted toward lower potential values by increasing pH values. The SHAM electrooxidation involves an irreversible transfer of one or two electron, depending on the pH of solution. If solution pH is lower than 3 and higher than 7, the two electron transfer is involved in the electrooxidation. While, from pH=3 to pH=7, the SHAM electrooxidation involves an irreversible transfer of one electron and two protons in the first step, in agreement with the one step one-electron mechanism. The effect of SHAM concentration on the electrode reaction was investigated in artificial saliva solution. SHAM gives a single irreversible oxidation wave over the wide concentration range studied. Possible mechanism of SHAM electrooxidation was proposed.

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Prevalence of QoI resistance and mtDNA diversity in the Irish Zymoseptoria tritici population

using a microtitre plate assay as described by Dooley et al (2016) with minor adjustments to reflect the test fungicide. This included a reduction in the test concentrations to 0, 0.01, 0.04, 0.123, 0.37, 1.1, 3.3 and 10 mg/L, plus/minus the inclusion of the alternative oxidase inhibitor salicylhydroxamic acid (SHAM) at a concentration of 30 mg/L. Differences in sensitivity between the three sites for both pyraclostrobin ± SHAM were determined by ANOVA using Genstat 18 th Edition. Molecular detection of resistance Following the QoI sensitivity, screening

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Kinetics and mechanism of electron transfer to pyridinium chlorochromate (VI) from sulfur containing amino acid, L-cysteine in aqueous and micellar media

-791. Sarkar, D. & Chatterjee, D. (1996). Kinetics of desorption of proteins from the surface of protein-coated alumina by various desorbing reagents. J. colloid Interf. Sci. 178, 606-613. DIO:10.1006/jois.1996.0157. Gosh, K.K. & Tiwary, L.K. (2003). Influence of sodium bis(2-ehyl-1-hexyl) sulfosuccinate/isooctane/water microwemulsions on the hydrolysis of salicylhydroxamic acid. J. Mol. Liquids. 102. 183-195. DOI: PII s0167-7322(02)00061-2. Sarkar, D., Khilar, K.C., Begum, G. & Subharao, P.V. (2005). Kinetics of basic

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