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application of hydrogen peroxide . Bangladesh J. Bot. 41 , 75 – 83 . 2. Aebi , H. ( 1983 ) Catalase. In: Bergmeyer, H. (ed.) Methods of Enzymatic Analysis. Weinheim

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the interest to develop environmentally benign, simple, selective, economical methods using environment friendly and cheap oxidants like molecular oxygen (O 2 ) and hydrogen peroxide (H 2 O 2 ). O 2 is one of the cheap and abundantly available

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Abstract  

Methylene blue degradation has been studied spectrophotometrically in alkaline and alkaline peroxide solutions. In both systems, the reaction proceeds via successive N-demethylation and deamination steps determined applying TLC and HPLC techniques. Disappearance of the dye obeys first-order kinetics under the excess of all other reactants. The rate expression for the hydrolytic process (in the absence of hydrogen peroxide) is as follows: –d[MB]/dt = (b[OH]/(1 + c[OH]))[MB]. Analogous forms of the reaction rate dependence on [OH] (at constant hydrogen peroxide concentration) and on [HO2 ] (at constant OH ion concentration) are observed: –d[MB]/dt = ((a′ + b′[OH])/(1 + c′[OH]))[MB] and –d[MB]/dt = ((a″+ b″[HO2 ])/(1 + c″[HO2 ]))[MB], respectively. A higher-order than linear dependence of the pseudo first-order rate constant on the nucleophiles (OH and/or HO2 ) concentrations results from the competitive formation of the ion pair of the cationic dye with the chloride of the supporting electrolyte and adducts of the dye with OH and/or HO2 anions.

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O’Connor, L. F, Scmid-Schonbein, G. W.: Plasma hydrogen peroxide production in hypertension subjects at genetic risk of hypertension. J. Hypertension, 1998, 16 , 291–303. Scmid-Schonbein G. W

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) Vitamin e protects chondrocytes against hydrogen peroxide-induced oxidative stress in vitro . Inflamm. Res. 62 , 781 – 789 . 4. Bonifacio , A. , Beleites , C. , Vittur , F

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. Neill , S. J. , Desikan , R. , Clarke , A. , Hurst , R. , Hancock , J. ( 2002 ) Hydrogen peroxide and nitric oxide as signalling molecules in plants . J. Exp. Bot. 53 , 1237 – 1247 . 3

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Abstract  

This work studied a way to reclaim uranium from contaminated UO2 oxide scraps as a sinterable UO2 powder for UO2 fuel pellet fabrication, which included a dissolution of the uranium oxide scraps in a carbonate solution with hydrogen peroxide and a UO4 precipitation step. Dissolution characteristics of reduced and oxidized uranium oxides were evaluated in a carbonate solution with hydrogen peroxide, and the UO4 precipitation were confirmed by acidification of uranyl peroxo–carbonate complex solution. An agglomerated UO4 powder obtained by the dissolution and precipitation of uranium in the carbonate solution could not be pulverized into fine UO2 powder by the OREOX process, because of submicron-sized individual UO4 particles forming the agglomerated UO4 precipitate. The UO2 powder prepared from the UO4 precipitate could meet the UO2 powder specifications for UO2 fuel pellet fabrication by a series of steps such as dehydration of UO4 precipitate, reduction, and milling. The sinterability of the reclaimed UO2 powder for fuel pellet fabrication was improved by adding virgin UO2 powder in the reclaimed UO2 powder. A process to reclaim the contaminated uranium scraps as UO2 fuel powder using a carbonate solution was finally suggested.

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utilizing the principle of protein-dye binding . Anal. Biochem. 72 : 248 – 254 . Brennan , T. , Frenkel , C. 1977 . Involvement of hydrogen peroxide in the regulation of

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. and Kogel, K.-H.(1999): Hypersensitive cell death and papilla formation in barley attacked by the powdery mildew fungus are associated with hydrogen peroxide but not with salicylic acid accumulation. Plant Physiol. 119, 1251

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peroxide plus) to inhibit potato sprouting during storage. Amer. J. Potato Res. 77, 63–65. Nuriel E. Using HPP (hydrogen peroxide plus) to inhibit potato sprouting during storage

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