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1.
Processes in the glucose-Escherichia coli cells-mediator-electrode bioelectrochemical system were studied using the kinetic model of processes on microbial mediator anodes. The model was constructed using the Michaelis-Menten equation. It takes into account the constants of substrate and mediator distribution between the inner medium of the cell and the working solution. The kinetic analysis of processes in the system under study showed that when Escherichia coli bacterial cells are used as a catalyst, methylene blue is a more effective mediator of electron transfer than gallocyanine. 相似文献
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Electrochemical oxidation of malonic esters in acetonitrile in the presence of iodides follows two different pathways depending
on the nature of the cation. In the presence of Lil, alkyl 1,1,2,2,3,3-propanetetracarboxylates were obtained in 85–98% yields.
In the presence of Nal, Kl, or Bu4NI, the formation of 1,1,2,2-ethanetetracarboxylates and their subsequent dehydrogenation to ethenetetracarboxylates was the
main reaction pathway.
Translated fromIzvestiya Akademii Nauk. Seriya Khimicheskaya, No. 3, pp. 620–623, March, 1997. 相似文献
3.
N. I. Kuznetsova A. F. Danilyuk V. A. Likholobov Yu. I. Yermakov 《Reaction Kinetics and Catalysis Letters》1979,12(3):235-239
Data are reported on variations of the gas phase volume and product accumulation in ethylene oxidation by lithium nitrate in acetic acid solutions, catalyzed by palladium acetate. An assumption is made on the routes of nitrate ion reduction.
, , . -.相似文献
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E. L. Kuksenko V. A. Golodov M. T. Abilov 《Reaction Kinetics and Catalysis Letters》1989,38(2):215-222
Depending on the reaction medium, acetate ions can both enhance and inhibit CO oxidation to CO2 in the presence of Pd(II), Ag(I) and Cu(I, II) complexes.
, - , CO CO2 Pd(II), Ag(I) Cu(I, II).相似文献
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The dehydrogenation of cycleanine with mercuric acetate in 10% AcOH (at the boil) has been studied. It has been shown that it is accompanied by oxidative cleavage similar to benzyl cleavage under the action of electron impact. The main reaction product (without complexone) is the 8-(4-hydroxymethylphenoxy)-6,7-dimethoxy-2-methylisoquinolinium salt C19H20NO4Cl·1.5H2O, mp 196°C. The oxidation of cycleanine in the presence of ethylenediaminetetraacetic acid gave the mercuride C19H19NO3I2Hg·2H2O, mp 240°C (water). 相似文献
8.
The dehydrogenation of cycleanine with mercuric acetate in 10% AcOH (at the boil) has been studied. It has been shown that it is accompanied by oxidative cleavage similar to benzyl cleavage under the action of electron impact. The main reaction product (without complexone) is the 8-(4-hydroxymethylphenoxy)-6,7-dimethoxy-2-methylisoquinolinium salt C19H20NO4Cl·1.5H2O, mp 196°C. The oxidation of cycleanine in the presence of ethylenediaminetetraacetic acid gave the mercuride C19H19NO3I2Hg·2H2O, mp 240°C (water).All-Union Scientific-Research Institute of Medicinal Plants, Moscow. Translated from Khimiya Prirodnykh Soedinenii, No. 5, pp. 676–680, September–October, 1979. 相似文献
9.
N. T. Berberova E. V. Shinkar’ I. V. Smolyaninov K. P. Pashchenko 《Doklady Chemistry》2015,465(2):295-298
An indirect electrochemical method for thiolation of cycloalkanes C5–C7 has been suggested. The method is based on a new approach to activation of hydrogen sulfide by redox mediators. 相似文献
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Kolesnichenko N. V. Batov A. E. Markova N. A. Slivinsky E. V. 《Russian Chemical Bulletin》2002,51(2):259-262
New catalytic systems based on RhCl3 and polymeric nitrogen- and oxygen-containing supports were proposed for the carbonylation of methyl acetate to acetic anhydride. The catalytic systems possess a high activity typical of homogeneous catalysts. The high activity is retained upon the repeated use of the catalyst separated from the reaction products. The nitrogen-containing polymers of the chitosan type serve as cocatalysts. In their presence, the induction period disappears, and the catalytically active species are stabilized, thus enabling the replacement of expensive LiI for cheaper salts of this metal. 相似文献
11.
S. I. Kulakovskaya A. V. Kulikov A. F. Shestakov 《Russian Journal of Electrochemistry》2007,43(10):1156-1163
The mechanism of oxidation of 2,5-dimethyl-, 2,3,5,6-tetramethyl-, 2,3-dimethyl-5,6-cyclohexa, and 3-phenyl-5,6-cyclohexapyrazine-di-N-oxides is studied by cyclic voltammetry, quantum chemical simulations, and ESR electrolysis. The studies are carried out on electrodes of glassy carbon and Pt in 0.1 M LiClO4 solutions in acetonitrile. ESR spectra of radical cations of substituted pyrazine-di-N-oxides are recorded. The effects of the temperature, oxygen, and the additions of water, pyridine, and acid on the shape of cyclic voltamograms and the intensity of ESR signals of pyrazine-di-N-oxides are studied. A quantum-chemical simulation of the reaction of pyrazine-di-N-oxide radical cations with acetonitrile is carried out. The oxidation of substituted pyrazine-di-N-oxides is described by the E1C1E2C2 mechanism, which includes the stage of the formation of a complex between the di-N-oxide radical cation and acetonitrile. 相似文献
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It was found that unlike ionol, amines effectively inhibit the oxidation of dibutyl ether. The stoichiometric inhibition coefficient for amines is close to two. During the initiated oxidation of dibutyl ether in the presence of inhibitors, an exchange takes place of cyanoisopropyl peroxy radicals for the peroxy radicals of dibutyl ether. The mechanism of the reaction with p-phenylenediamine (p-PDA) probably consists in the formation of a fairly stable complex consisting of an amine molecule and two peroxy radicals. This reaction does not result in the formation of a hydroperoxide.Translated from Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya, No. 6, pp. 1268–1273, June, 1990. 相似文献
14.
The possibility of preparing gadolinium chelates of various compositions by electrolysis of a nonaqueous solution containing thenoyltrifluoroacetone was examined. 相似文献
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V. A. Zagumennov N. A. Sizova E. V. Nikitin 《Russian Journal of General Chemistry》2009,79(7):1473-1482
Anodic oxidation of tertiary phosphines (tripropyl-, tributyl-, and triphenylphosphine) in the presence of a bicyclic alkene
(camphene) on a platinum and a glassy carbon electrodes was studied. For the first time the voltammetric characteristics of
the process of camphene anodic oxidation were obtained. The electrochemical reactions with alkyl and aromatic phosphine were
found to be dissimilar. The results of preparative electrooxidation of trialkylphosphines showed that in the course of electrolysis
the tertiary phosphine cation-radicals generated on the anode enter into two concurrent reactions: (1) with the parent phosphine
to form eventually trialkylphosphonium salts and trialkylphosphine oxides presumably as complex compounds and (2) with camphene
to form trialkylcamphenylphosphonium salts and probably phosphonium salts with a monocyclic substituent. Preparative electrochemical
oxidation of triphenylphosphine in the presence of camphene affords almost exclusively either triphenylphosphine oxide (in
the experiment with platinum anode) or the triphenylphosphine oxide complex with perchloric acid (at the electrolysis on a
glassy carbon anode). 相似文献
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T. A. Fedushchak N. V. Sizova L. M. Velichkina 《Russian Journal of Physical Chemistry A, Focus on Chemistry》2009,83(8):1363-1370
The oxidation of isopropylbenzene with oxygen in the presence of copper nanopowders prepared under various wireelectrical
explosion conditions was studied. The oxidative conversion of isopropylbenzene was observed only for nanopowders with a linear
function of oxygen absorption. Holding copper nanopowders in a vacuum stimulated their initiating activity. A lower initial
temperature of the oxidation of nanopowders in air corresponded to a higher rate of oxygen absorption by isopropylbenzene.
The amount of absorbed oxygen was not equivalent to the conversion of isopropylbenzene. 相似文献
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A. D. Bukhtoyarova T. V. Rybalova L. V. Ektova 《Russian Journal of Organic Chemistry》2010,46(6):855-859
The reaction of 5-hydroxy-1,4-naphthoquinone with butylamine in the presence of copper(II) acetate monohydrate on heating
resulted in the formation of a mixture of regioisomeric 2,6- and 2,8-bis(butylamino)-5-hydroxy-1,4-naphthoquinones. 相似文献
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