| 1. |
THE DETERMINATION OF THE METALS OF THE PLATINUM GROUP IN NICKEL ORES AND CONCENTRATES |
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Canadian Journal of Research,
Volume 18b,
Issue 11,
1940,
Page 333-344
F. E. Lathe,
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摘要:
Most published methods for the determination of platinum and associated metals are not of general application to ores and concentrates, and their accuracy as applied to unknown material is in many cases seriously open to question. The methods here described are chiefly based upon experience with the products of the Sudbury area, but are believed to be applicable without substantial modification to all sulphide ores of nickel and to smelter and refinery products derived therefrom. Methods of concentrating the platinum metals are described, an outline is given of an approximate method of determination based on sulphuric acid parting, and details of a more reliable method in which nitric acid is the parting medium are set out. The results obtained are compared with those of Beamish and associates on similar material.
ISSN:1923-4287
DOI:10.1139/cjr40b-042
出版商:NRC Research Press
年代:1940
数据来源: NRC
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| 2. |
ENZYME INHIBITION BY DERIVATIVES OF PHENOTHIAZINE AND OF SULPHANILAMIDE |
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Canadian Journal of Research,
Volume 18b,
Issue 11,
1940,
Page 345-350
H. B. Collier,
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摘要:
Mammalian catalase and cytochrome oxidase are strongly inhibited by the hydroxy derivatives of phenothiazine and byp-hydroxylaminobenzenesulphonamide. Phenothiazine, sulphanilamide, and sulphapyridine have little or no effect. Cytochrome-c is irreversibly reduced by the hydroxy-sulphanilamide, as indicated by spectroscopic observation. The inhibitory activity apparently depends on the presence of the hydroxyl group. The relation of these findings to the vermicidal and bactericidal action of the compounds is discussed.Phenothiazine and thionol have no effect onAscaris lumbricoides in vitro.
ISSN:1923-4287
DOI:10.1139/cjr40b-043
出版商:NRC Research Press
年代:1940
数据来源: NRC
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| 3. |
THE KINETICS OF THE DECOMPOSITION REACTIONS OF THE LOWER PARAFFINS: VII. THE NITRIC OXIDE INHIBITED DECOMPOSITION OF ETHANE |
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Canadian Journal of Research,
Volume 18b,
Issue 11,
1940,
Page 351-357
E. W. R. Steacie,
Gerald Shane,
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摘要:
An investigation has been made of the nitric oxide inhibited thermal decomposition of ethane. Apparent chain lengths of 2.4 to 5 are found at temperatures from 640° to 565 °C. The activation energy of the inhibited reaction is found to be 77.3 Kcal. The results are discussed and it is concluded that the thermal decomposition of ethane proceeds mainly by a rearrangement mechanism and that free-radical chain mechanisms for the ethane decomposition are untenable.
ISSN:1923-4287
DOI:10.1139/cjr40b-044
出版商:NRC Research Press
年代:1940
数据来源: NRC
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| 4. |
NITROXYL PERCHLORATE |
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Canadian Journal of Research,
Volume 18b,
Issue 11,
1940,
Page 358-362
J. W. T. Spinks,
W. E. Gordon,
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摘要:
A method for the preparation of nitroxyl perchlorate is outlined. Its empirical formula is NClO6. Some of its physical and chemical properties are described.
ISSN:1923-4287
DOI:10.1139/cjr40b-045
出版商:NRC Research Press
年代:1940
数据来源: NRC
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| 5. |
THE BROMINE SENSITIZED PHOTODECOMPOSITION OF OZONE |
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Canadian Journal of Research,
Volume 18b,
Issue 11,
1940,
Page 363-371
R. Mungen,
J. W. T. Spinks,
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摘要:
Bromine acts as a sensitizer for the photodecomposition of ozone. The quantum efficiency for the bromine sensitized reaction is about 30. The effect of variation of wave-length, concentration, light intensity, and temperature has been studied. The quantum efficiency is the same for wave-lengths 5460 and 3650 Å and is independent of the ozone concentration, but varies somewhat with bromine concentration and light intensity. The temperature coefficient is 1.01. Under certain conditions an oxide of bromine, produced photochemically, can be isolated.
ISSN:1923-4287
DOI:10.1139/cjr40b-046
出版商:NRC Research Press
年代:1940
数据来源: NRC
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