摘要:

Deuterated azobismethane was synthesized in the conventional way from dimethyl sulphate and hydrazine.

ISSN:0008-4042    

DOI:10.1139/v59-001

出版商:NRC Research Press    

年代:1959

数据来源: NRC

摘要:

When sap from tobacco, infected with potato X virus, was dialyzed against 0.05 Mand then against 0.005 Msodium citrate, no aggregation of the virus was detected after ultracentrifugation. Flow birefringence measurements were made to compare virus preparations obtained by ultracentrifugation of untreated sap and of sap that had been treated with various buffers. Only versene and citrate were found to prevent aggregation. The influence of pH in the range 5.7–7.3 was very slight. Possible explanations of this effect are discussed.Nitrogen and phosphorus content and the sedimentation constant of the purified, non-aggregated virus are reported.

ISSN:0008-4042    

DOI:10.1139/v59-002

出版商:NRC Research Press    

年代:1959

数据来源: NRC

摘要:

The N-terminal and the C-terminal residues of human and horse hair and partially reduced hair have been determined. Aspartic acid, glutamic acid, glycine, serine, threonine, alanine, and valine were identified as N-terminal groups. Aspartic acid, glutamic acid, glycine, serine, threonine, and alanine were identified as C-terminal groups. These are the same N-terminal and C-terminal amino acids as have been found previously for wool and feather keratin.

ISSN:0008-4042    

DOI:10.1139/v59-003

出版商:NRC Research Press    

年代:1959

数据来源: NRC

摘要:

The electrical conductances of ethyl bromide,n-propyl bromide,n-butyl bromide, methanol, and ethanol in ultrasonic fields have been measured at frequencies between 250 kc/s and 2 Mc/s and intensities between 0.7 and 24 w/cm2. Measurements were made at room temperature, using a simple d-c. technique. It is shown that asimpletransient increase in conductance, such as has previously been observed by Seidl, may be confined to unassociated fluids and that it can occasionally give way to a much more complex—and not as yet fully understood—behavior pattern.

ISSN:0008-4042    

DOI:10.1139/v59-004

出版商:NRC Research Press    

年代:1959

数据来源: NRC

摘要:

X-Ray fluorescence has been applied to the analysis of flotation concentrates obtained from pegmatitic uranium ores occurring in Northern Saskatchewan. Approximate uranium analyses can be obtained by direct measurement on flotation concentrates but more accurate results are obtained by using an internal standard such as strontium or yttrium. The time required for an analysis, as compared to that of conventional chemical or fluorimetric methods, is considerably reduced and flotation pilot plant operations can therefore be more effectively controlled. The method has been extended to include the analysis of sulphate leach liquors obtained from the leaching of pegmatitic ores and their flotation concentrates. Organic phases obtained in liquid – liquid extraction studies can also be rapidly analyzed for uranium by X-ray fluorescence.

ISSN:0008-4042    

DOI:10.1139/v59-005

出版商:NRC Research Press    

年代:1959

数据来源: NRC

摘要:

Acid hydrolysis of extractive-free white spruce wood produced a number of neutral and acidic sugars and oligosaccharides. The acidic components were isolated and three of these were shown to be 4-O-methyl-D-glucuronic acid, 2-O-(4-O-methyl-α-D-glucopyranosyluronic acid)-D-xylose, and tentativelyO-(4-O-methyl-α-D-glucopyranosyluronic acid)-(1→ 2)-O-β-D-xylopyranosyl-(1→ 4)-D-xylopyranose.

ISSN:0008-4042    

DOI:10.1139/v59-006

出版商:NRC Research Press    

年代:1959

数据来源: NRC

摘要:

An investigation has been made of the reaction of Hg202(3P1) atoms, photoexcited in natural mercury vapor, with several HgO-forming substrates, including water vapor, nitrous oxide, and oxygen. The reactions were carried out under flow conditions at room temperature. Emphasis has been placed on the Hg202content of the HgO product. Enrichment in Hg202would be evidence of the primary formation of a mercury compound.In the reactions with nitrous oxide and oxygen, it was found that the HgO product contained the normal abundance of Hg202. With water vapor, a product containing up to 35% Hg202was obtained, compared to the normal abundance of 29.8%. The addition of 1,3-butadiene to the water vapor substrate was found to have a marked effect on the enrichment in Hg202in the HgO product. A product containing 85% Hg202was recovered when the substrate contained 21 mole % of added butadiene. A systematic study of the effect of butadiene concentration on the enrichment reaction showed that the Hg202content remains constant for butadiene concentrations exceeding approximately 10 mole %. The water–butadiene reaction is recommended as a simple method for preparing Hg202from natural mercury.The factors influencing the enrichment process are discussed, together with the significance of the results with respect to the mechanisms of decomposition of the molecules studied.

ISSN:0008-4042    

DOI:10.1139/v59-007

出版商:NRC Research Press    

年代:1959

数据来源: NRC

摘要:

Quinolino-(2′:3′:3:4)-quinoline has been synthesized from 3-aminoquinoline-4-carboxylic acid via 4′-hydroxyquinolino-(2′:3′:3:4)-quinoline.

ISSN:0008-4042    

DOI:10.1139/v59-008

出版商:NRC Research Press    

年代:1959

数据来源: NRC

摘要:

An infrared study of the liquid complex of aluminum chloride with acetyl chloride has been undertaken. The results indicate that the pure liquid complex is not a simple mixture, but consists of (1) the donor–acceptor complexand (2) the ions [CH3CO]+and [AlCl4]−. A solution of the liquid complex in a solvent of high dielectric constant like nitrobenzene (ϵ = 36.1) contains both these species, but in a low dielectric constant solvent like chloroform (ϵ = 5.05) only (1) is present. The carbon–chlorine bond in (1) is modified. The mechanism of Friedel–Crafts ketone synthesis is briefly examined in the light of these results.

ISSN:0008-4042    

DOI:10.1139/v59-009

出版商:NRC Research Press    

年代:1959

数据来源: NRC

摘要:

The adsorption of krypton on graphite has been measured above and below its Triple Point. Above the Triple Point, a smooth isotherm was found which showed two types of hysteresis. In contrast, the isotherm measured below the Triple Point displayed two discontinuities. The surface area of this graphite measured by means of the krypton isotherm was found to be in agreement with that previously measured by nitrogen adsorption.

ISSN:0008-4042    

DOI:10.1139/v59-010

出版商:NRC Research Press    

年代:1959

数据来源: NRC