Oxygen In Alkaline Solution Research Articles

Cu (II)存在下でのアルカリ水溶液中におけるAs (III)の酸素による酸化反応

The kinetics of the oxidation of As(III) with oxygen in alkaline solutions in the presence of Cu(II) was studied. The oxidation reaction of As(III) proceeds via two different paths; one is independent of pO2, while the other is dependent on pO2. The former path is influenced by the concentration of alkali, showing the suppressed tendency with the increase in alkali concentration. On the other hand, the latter path is independent of the concentration of alkali. The dependences of the two paths on the concentration of Cu(II) appeared to be different from each other.The experimental rate equation was found to be(This article is not displayable. Please see full text pdf.) \ oindentThe apparent activation energy is 105.3 kJ·mol−1 for the former path and 21.3 kJ·mol−1 for the latter path. The reaction rate is affected by presence of alkali in the solution, exhibiting an accelerating tendency according to the sequence of LiOH<NaOH<KOH.

アルカリ水溶液中におけるAs (III)の加圧酸素による酸化反応

アルカリ水溶液中におけるAs (III)の加圧酸素による酸化反応

Prostaglandins VI 1 base-catalysed autoxidation of α-hydroxycyclopentanones and the synthesis of 9,10-diketoprostanoic acids

α-Hydroxycylopentanones (1,3) are autoxidised to 1,2-cyclopentanediones (2) by molecular oxygen in alkaline solution. This oxidation procedure is used in the first synthesis of an 11-deoxy-9, 10-diketoprostaglandin.

Kinetics of Absorption of Oxygen in Alkaline Solutions Containing Hydroquinone

Kinetics of Absorption of Oxygen in Alkaline Solutions Containing Hydroquinone

ChemInform Abstract: STUDIES OF AUTOXIDATION. III. OXIDATION OF 4‐NITRO‐2‐TOLUENESULFONATE WITH MOLECULAR OXYGEN IN ALKALINE SOLUTION. ANALYSIS OF REACTION PRODUCTS BY MEANS OF HIGH‐SPEED LIQUID CHROMATOGRAPHY

Chemischer InformationsdienstVolume 7, Issue 32 Isocyclic Compounds ChemInform Abstract: STUDIES OF AUTOXIDATION. III. OXIDATION OF 4-NITRO-2-TOLUENESULFONATE WITH MOLECULAR OXYGEN IN ALKALINE SOLUTION. ANALYSIS OF REACTION PRODUCTS BY MEANS OF HIGH-SPEED LIQUID CHROMATOGRAPHY T. MIYATA, T. MIYATASearch for more papers by this authorA. ITO, A. ITOSearch for more papers by this authorTS. HIRASHIMA, TS. HIRASHIMASearch for more papers by this authorO. MANABE, O. MANABESearch for more papers by this author T. MIYATA, T. MIYATASearch for more papers by this authorA. ITO, A. ITOSearch for more papers by this authorTS. HIRASHIMA, TS. HIRASHIMASearch for more papers by this authorO. MANABE, O. MANABESearch for more papers by this author First published: August 10, 1976 https://doi.org/10.1002/chin.197632190Read the full textAboutPDF ToolsRequest permissionExport citationAdd to favoritesTrack citation ShareShare Give accessShare full text accessShare full-text accessPlease review our Terms and Conditions of Use and check box below to share full-text version of article.I have read and accept the Wiley Online Library Terms and Conditions of UseShareable LinkUse the link below to share a full-text version of this article with your friends and colleagues. Learn more.Copy URL Share a linkShare onEmailFacebookTwitterLinked InRedditWechat No abstract is available for this article. Volume7, Issue32August 10, 1976 RelatedInformation

Photometric determination of manganese in water by using o-tolidine.

Oxidation products of manganese react with o-tolidine to produce a yellow colour, which can be utilised for the photometric determination of manganese. Prior to the determination, divalent manganese is converted into the higher valency forms by oxidation with atmospheric oxygen in alkaline solution in the presence of magnesium and iron(III) salts.

Oxygen ionization on nickel in alkaline solutions

The ionization of oxygen in alkaline solutions on a nickel substrate is examined, with special reference to the state of the nickel surface. If nickel is maintained at above ca −0·15 V vs hydrogen in the same solution, oxygen begins to be adsorbed: above +0·1 V a phase oxide such as Ni(OH)2 is probably formed. The ionization of oxygen slows down (at any one potential) with increasing oxidation of the electrode.

The biosynthesis of phenols. XI. Oxidation of a model carboxyamide related to 6-methylpretetramid.

The oxidation of 3-acetyl-2,6-dihydroxy-4-methylbenzamide, a model compound related to pretetramid, has been studied, using oxygen in alkaline solution and Fremy's salt.

Die anwendung der rotierenden scheibenelektrode mit einem ringe zur untersuchung von zwischenprodukten elektrochemischer reaktionen

A rotating disk electrode fitted with an isolated metal ring was found to be a suitable instrument for investigating intermediate products in electrochemical reactions. Starting from the theory of convection diffusion, equations were deduced ind these were tested in the case of the reduction of oxygen in alkaline solution.

The Oxidation of Di-t-butylpyrogallol by Oxygen in Alkaline Solution. II. Absorption Spectra of the Products

The Oxidation of Di-t-butylpyrogallol by Oxygen in Alkaline Solution. II. Absorption Spectra of the Products

Beitrag zur Kenntnis der Mangan(II)‐manganite und des δ‐MnO2

Abstract1. A manganous manganite with a very low degree of disorder is described with the composition: 4 MnO2, Mn(OH)2, 2H2O. It is formed by recrystallisation of dry 3 MnO2, Mn(OH)2, xH2O, or in direct preparation by oxydation of Mn(OH)2 with oxygen in alkaline solution. The X‐ray diffraction pattern obtained with the powder method of Debye‐Scherrer shows sharp lines. The possible hexagonal indication leads to a double‐layer structure.

The Oxidation of Di-t-Butylpyrogallol by Oxygen in Alkaline Solution

The Oxidation of Di-t-Butylpyrogallol by Oxygen in Alkaline Solution

THE EFFECT OF CAUSTIC ALKALI ON THE OXIDATION OF STANNOUS CHLORIDE WITH AIR

Abstract (1) The oxidation velocity of stannous chloride in alkaline solutions with air was studied. It was found to be the same as that of sodium sulphite when the concentration of alkali is greater than about 0.2 normal under the given condition. (2) The effect of temperature was small. (3) The dissolution velocity of oxygen in alkaline solutions was calculated indirectly.

The photochemistry of cod liver oil

SummaryThe results of Kugelmass and McQuarrie reported in Science, Vol. 60, No. 1551, Sept. 19, 1924, in which cod liver oil and other antirachitic substances were found to radiate ultraviolet light upon oxidation with atmospheric oxygen in alkaline solution have not been confirmed. The positive results obtained by the authors were traced to faulty technique and presumably were due to black body radiation, since controls gave the same photographic results as the cod liver oil.

The Photochemistry of Cod Liver Oil

SummaryThe results of Kugelmass and McQuarrie reported in Science, Vol. 60, No. 1551, Sept. 19, 1924, in which cod liver oil and other antirachitic substances were found to radiate ultraviolet light upon oxidation with atmospheric oxygen in alkaline solution have not been confirmed. The positive results obtained by the authors were traced to faulty technique and presumably were due to black body radiation, since controls gave the same photographic results as the cod liver oil.

THE DETECTION AND ESTIMATION OF GLUCOSE IN URINE

A REAGENT FOR QUALITATIVE USE The property possessed by glucose, in common with many other sugars, of readily taking up oxygen in alkaline solution, is almost universally employed as a means of detecting this substance in urine. The glucose molecule itself, however, is not the active reducing substance in alkaline solution, it having been previously shown1that the reducing action is due to a substance formed from the action of alkali on the sugar molecule. The reducing substance thus formed is not stable toward strong alkali, and unless permitted to exhibit its reducing action at once, is rapidly decomposed into compounds which have no reducing power, if sodium or potassium hydroxid be present. Solutions of the alkali carbonates, on the other hand, form the reducing substance from glucose a little more slowly than do the hydroxids, and have little, if any, deslniotive action on the reducing substance after it