Using structural data and vibrational frequencies measured recently, the thermodynamic functions of gaseous hydrogen peroxide were calculated by the statistical method over the range 298.16 to 1500°K. at 100° intervals. Some uncertainty results from the lack of accurate information on the potential barrier hindering free rotation of the OH groups in the molecule. The equilibrium constants of a few important reactions involving hydrogen peroxide were also calculated from existing data on the heat of decomposition and the heat of dilution.
{"title":"THE THERMODYNAMIC FUNCTIONS OF HYDROGEN PEROXIDE","authors":"P. Giguère","doi":"10.1139/CJR50B-058","DOIUrl":"https://doi.org/10.1139/CJR50B-058","url":null,"abstract":"Using structural data and vibrational frequencies measured recently, the thermodynamic functions of gaseous hydrogen peroxide were calculated by the statistical method over the range 298.16 to 1500°K. at 100° intervals. Some uncertainty results from the lack of accurate information on the potential barrier hindering free rotation of the OH groups in the molecule. The equilibrium constants of a few important reactions involving hydrogen peroxide were also calculated from existing data on the heat of decomposition and the heat of dilution.","PeriodicalId":9392,"journal":{"name":"Canadian journal of research","volume":"7 1","pages":"485-491"},"PeriodicalIF":0.0,"publicationDate":"1950-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87031535","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Cyclotetradecanol–on–2 was dehydrated in the gas phase to cyclotetradecen–one–3. The latter was reduced with lithium aluminum hydride to cyclotetradecen–ol–3, which was converted by dehydration to cyclotetradecadiene. This compound gave with maleic anhydride 3-6-decamethylene tetrahydrophthallic anhydride. The same series of reactions was performed in the cyclooctadecane series.
{"title":"SYNTHESIS OF LARGE RING DIENES AND THEIR REACTION WITH MALEIC ANHYDRIDE","authors":"R. Ingraham, D. M. Macdonald, K. Wiesner","doi":"10.1139/CJR50B-055","DOIUrl":"https://doi.org/10.1139/CJR50B-055","url":null,"abstract":"Cyclotetradecanol–on–2 was dehydrated in the gas phase to cyclotetradecen–one–3. The latter was reduced with lithium aluminum hydride to cyclotetradecen–ol–3, which was converted by dehydration to cyclotetradecadiene. This compound gave with maleic anhydride 3-6-decamethylene tetrahydrophthallic anhydride. The same series of reactions was performed in the cyclooctadecane series.","PeriodicalId":9392,"journal":{"name":"Canadian journal of research","volume":"68 1","pages":"453-459"},"PeriodicalIF":0.0,"publicationDate":"1950-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79145665","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
It was assumed that any practical stabilizer for nitrocellulose would have to meet the following requirements: (a) absorb nitrogen dioxide at least as avidly as the accepted stabilizer, sym-diethyldiphenylurea (Centralite); (b) cause destruction of nitrocellulose in the Bergmann–Junk heat test no greater than that caused by the accepted stabilizer, diphenylamine; (c) be no less compatible than diphenylamine with nitrocellulose; and (d) melt no higher than 80 °C., have low volatility and low solubility in water. These requirements were met by N,N′-diethyl-N,N′-di-(3-methoxy-4-ethoxybenzyl) -urea, N,N′-diethyl-N,N′-di-(3,4-dimethoxybenzyl)-succinamide, di-(3,4-dimethoxystyryl)-ketone, and perhaps by veratric aldehyde. The criteria, however, were quite inadequate to assess in a positive way any practical value of the above substances as stabilizers. A study of substances structurally related to those already mentioned revealed no correlation between avidity for nitrogen dioxide and efficiency in improving th...
{"title":"PRELIMINARY TESTS ON POSSIBLE NEW STABILIZERS FOR NITROCELLULOSES","authors":"C. Purves, V. Grassie, L. Mitchell, J. M. Pepper","doi":"10.1139/CJR50B-057","DOIUrl":"https://doi.org/10.1139/CJR50B-057","url":null,"abstract":"It was assumed that any practical stabilizer for nitrocellulose would have to meet the following requirements: (a) absorb nitrogen dioxide at least as avidly as the accepted stabilizer, sym-diethyldiphenylurea (Centralite); (b) cause destruction of nitrocellulose in the Bergmann–Junk heat test no greater than that caused by the accepted stabilizer, diphenylamine; (c) be no less compatible than diphenylamine with nitrocellulose; and (d) melt no higher than 80 °C., have low volatility and low solubility in water. These requirements were met by N,N′-diethyl-N,N′-di-(3-methoxy-4-ethoxybenzyl) -urea, N,N′-diethyl-N,N′-di-(3,4-dimethoxybenzyl)-succinamide, di-(3,4-dimethoxystyryl)-ketone, and perhaps by veratric aldehyde. The criteria, however, were quite inadequate to assess in a positive way any practical value of the above substances as stabilizers. A study of substances structurally related to those already mentioned revealed no correlation between avidity for nitrogen dioxide and efficiency in improving th...","PeriodicalId":9392,"journal":{"name":"Canadian journal of research","volume":"60 1","pages":"468-484"},"PeriodicalIF":0.0,"publicationDate":"1950-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73658772","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
A projector unit is described in which the film advance sprocket is driven by a reversible motor and the glass pressure plate is automatically released while the film is being moved. The film spools accommodate 100 ft. of 35 mm. film and take up slack in both directions. Several units may be used simultaneously for correlation of multiple records.
{"title":"A REMOTE CONTROL PROJECTOR FOR THE EXAMINATION OF EXPERIMENTAL RECORDS ON 35 mm. FILM","authors":"E. Webb","doi":"10.1139/CJR50F-027","DOIUrl":"https://doi.org/10.1139/CJR50F-027","url":null,"abstract":"A projector unit is described in which the film advance sprocket is driven by a reversible motor and the glass pressure plate is automatically released while the film is being moved. The film spools accommodate 100 ft. of 35 mm. film and take up slack in both directions. Several units may be used simultaneously for correlation of multiple records.","PeriodicalId":9392,"journal":{"name":"Canadian journal of research","volume":"72 1","pages":"315-323"},"PeriodicalIF":0.0,"publicationDate":"1950-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82717843","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
The method of mercury photosensitization has been used in an investigation of the reaction between atomic hydrogen and methyl chloride at 25 °C. The main products are methane, hydrogen chloride, and ethylene chloride. The last is assumed to rise through recombination of chloromethyl radicals formed by either of the reactions,
{"title":"THE MERCURY (3P1) PHOTOSENSITIZED REACTION OF ATOMIC HYDROGEN WITH METHYL CHLORIDE","authors":"D. J. L. Roy, G. L. Lee","doi":"10.1139/CJR50B-060","DOIUrl":"https://doi.org/10.1139/CJR50B-060","url":null,"abstract":"The method of mercury photosensitization has been used in an investigation of the reaction between atomic hydrogen and methyl chloride at 25 °C. The main products are methane, hydrogen chloride, and ethylene chloride. The last is assumed to rise through recombination of chloromethyl radicals formed by either of the reactions,","PeriodicalId":9392,"journal":{"name":"Canadian journal of research","volume":"40 1","pages":"500-506"},"PeriodicalIF":0.0,"publicationDate":"1950-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76171982","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Lycopodine gives rise to a hydrazone, is reduced to a secondary alcohol, and reacts with phenyl-lithium to form a tertiary carbinol; hence, the oxygen atom of the base is present in a keto group. The base reacts with cyanogen bromide to form two cyanobromolycopodines, α and β. α-Cyanobromolycopodine is converted by potassium acetate in alcohol to α-cyanoacetoxylycopodine, hydrolyzable to α-cyanohydroxylycopodine, which can be oxidized to an acid. The action of methanolic potassium hydroxide on α-cyanobromolycopodine gives rise to a nonoxidizable, nonreducible neutral compound, while a similar isomeric and equally inert substance is produced by the action of a boiling ethanolic solution of potassium acetate on β-cyanobromolycopodine. Both α- and β-cyanobromolycopodines are hydrogenated catalytically to two isomeric products C17H26ON2. α-Cyanobromolycopodine with trimethylamine forms of quaternary salt which, when subjected to the conditions of the Hofmann degradation, gives rise to a base differing from th...
{"title":"THE ALKALOIDS OF LYCOPODIUM SPECIES: XI. NATURE OF THE OXYGEN ATOM IN LYCOPODINE; SOME REACTIONS OF THE BASE","authors":"R. Manske, L. Marion, D. Maclean","doi":"10.1139/CJR50B-056","DOIUrl":"https://doi.org/10.1139/CJR50B-056","url":null,"abstract":"Lycopodine gives rise to a hydrazone, is reduced to a secondary alcohol, and reacts with phenyl-lithium to form a tertiary carbinol; hence, the oxygen atom of the base is present in a keto group. The base reacts with cyanogen bromide to form two cyanobromolycopodines, α and β. α-Cyanobromolycopodine is converted by potassium acetate in alcohol to α-cyanoacetoxylycopodine, hydrolyzable to α-cyanohydroxylycopodine, which can be oxidized to an acid. The action of methanolic potassium hydroxide on α-cyanobromolycopodine gives rise to a nonoxidizable, nonreducible neutral compound, while a similar isomeric and equally inert substance is produced by the action of a boiling ethanolic solution of potassium acetate on β-cyanobromolycopodine. Both α- and β-cyanobromolycopodines are hydrogenated catalytically to two isomeric products C17H26ON2. α-Cyanobromolycopodine with trimethylamine forms of quaternary salt which, when subjected to the conditions of the Hofmann degradation, gives rise to a base differing from th...","PeriodicalId":9392,"journal":{"name":"Canadian journal of research","volume":"110 1","pages":"460-467"},"PeriodicalIF":0.0,"publicationDate":"1950-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78098612","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Keys to the genera and species of mosquito larvae of the four western provinces of Canada are presented. To facilitate identification the generic and specific characters used in the keys are fully ...
本文介绍了加拿大西部四省蚊幼虫属、种的分类。为了便于识别，键中使用的通用字符和特定字符完全…
{"title":"A GUIDE TO THE MOSQUITO LARVAE OF WESTERN CANADA","authors":"J. Rempel","doi":"10.1139/CJR50D-015","DOIUrl":"https://doi.org/10.1139/CJR50D-015","url":null,"abstract":"Keys to the genera and species of mosquito larvae of the four western provinces of Canada are presented. To facilitate identification the generic and specific characters used in the keys are fully ...","PeriodicalId":9392,"journal":{"name":"Canadian journal of research","volume":"1 1","pages":"207-248"},"PeriodicalIF":0.0,"publicationDate":"1950-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82980864","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
A simple apparatus has been developed for fractionating polycomponent gas samples at temperatures at which the take-off pressure is of the order of 0.5 mm. Fractions as small as 0.06 cc. of gas have been isolated and their vapor pressures determined.
{"title":"AN APPARATUS FOR THE LOW TEMPERATURE FRACTIONATION OF SMALL GAS SAMPLES","authors":"D. J. L. Roy","doi":"10.1139/CJR50B-059","DOIUrl":"https://doi.org/10.1139/CJR50B-059","url":null,"abstract":"A simple apparatus has been developed for fractionating polycomponent gas samples at temperatures at which the take-off pressure is of the order of 0.5 mm. Fractions as small as 0.06 cc. of gas have been isolated and their vapor pressures determined.","PeriodicalId":9392,"journal":{"name":"Canadian journal of research","volume":"46 1","pages":"492-499"},"PeriodicalIF":0.0,"publicationDate":"1950-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74099234","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Heat transfer coefficients have been determined in a fluidized solids bed under a wide variety of conditions. The variables studied were particle size, bulk density under nonfluidized conditions, particle shape, and air velocity. Simple correlations have been established predicting the value of h in the air flow range investigated. An equation predicting the minimum fluidizing velocity has also been derived.
{"title":"HEAT TRANSFER IN A FLUIDIZED SOLIDS BED","authors":"J. Klassen, P. E. Gishler, A. Baerg","doi":"10.1139/CJR50F-025","DOIUrl":"https://doi.org/10.1139/CJR50F-025","url":null,"abstract":"Heat transfer coefficients have been determined in a fluidized solids bed under a wide variety of conditions. The variables studied were particle size, bulk density under nonfluidized conditions, particle shape, and air velocity. Simple correlations have been established predicting the value of h in the air flow range investigated. An equation predicting the minimum fluidizing velocity has also been derived.","PeriodicalId":9392,"journal":{"name":"Canadian journal of research","volume":"176 1","pages":"287-307"},"PeriodicalIF":0.0,"publicationDate":"1950-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75982045","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
An electromechanical instrument has been developed, which adds, subtracts, multiplies, or divides the ordinates of two curves in Cartesian co-ordinates, plotting the resulting locus. This uses the principle of the Wheatstone bridge, and is semiautomatic; the curves are followed manually, but a phase-sensitive servo system keeps the bridge in balance. Attachments are provided for determining the area under the resulting curve, and also for the performance of certain logarithmic operations of interest in photometry. In the ordinary use of the computer, the accuracy is about 0.3% of full scale or better.
{"title":"THE CURVE COMPUTER","authors":"W. Middleton","doi":"10.1139/CJR50F-028","DOIUrl":"https://doi.org/10.1139/CJR50F-028","url":null,"abstract":"An electromechanical instrument has been developed, which adds, subtracts, multiplies, or divides the ordinates of two curves in Cartesian co-ordinates, plotting the resulting locus. This uses the principle of the Wheatstone bridge, and is semiautomatic; the curves are followed manually, but a phase-sensitive servo system keeps the bridge in balance. Attachments are provided for determining the area under the resulting curve, and also for the performance of certain logarithmic operations of interest in photometry. In the ordinary use of the computer, the accuracy is about 0.3% of full scale or better.","PeriodicalId":9392,"journal":{"name":"Canadian journal of research","volume":"172 1","pages":"324-332"},"PeriodicalIF":0.0,"publicationDate":"1950-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79512187","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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