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Study of the system CaO-SiO2-H2O at 30 C and of the reaction of water on the anhydrous calcium silicates 30℃下CaO-SiO2-H2O体系及水与无水硅酸钙反应的研究
Bureau of Standards Journal of Research Pub Date : 1934-06-01 DOI: 10.6028/JRES.012.060
E. Flint, L. S. Wells
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引用次数: 102
Properties of white Braille papers for Library of Congress Publications 国会图书馆出版物用盲文白纸的特性
Bureau of Standards Journal of Research Pub Date : 1934-06-01 DOI: 10.6028/JRES.012.063
C. G. Weber
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引用次数: 0
Iodine number of wool: A method for determining the action of various chemical reagents on wool and other proteins 羊毛碘值:测定各种化学试剂对羊毛和其他蛋白质作用的方法
Bureau of Standards Journal of Research Pub Date : 1934-06-01 DOI: 10.6028/JRES.012.062
M. Hariss, H. Neville, W. C. Fritz
{"title":"Iodine number of wool: A method for determining the action of various chemical reagents on wool and other proteins","authors":"M. Hariss, H. Neville, W. C. Fritz","doi":"10.6028/JRES.012.062","DOIUrl":"https://doi.org/10.6028/JRES.012.062","url":null,"abstract":"The purpose of this research was to find a method for determining the action of various chemical reagents upon wool. The iodine number provides a qualitative measure of the extent to which the amino groups are affected by various treatments of the protein. Amino acids and proteins exhibit iodine numbers as determined by the standard method. The iodine numbers of such substances do not indicate ordinary unsaturation but are shown to be related to the free amino nitrogen content. The iodine numbers of some typical proteins are reported and a general correspondence between the iodine numbers and the isoelectric points of the proteins is shown. Conversion of amino groups to hydroxyl groups, combination of amino groups with strong acids, and other chemical reactions which affect the amino groups reduce the iodine numbers of amino acids (with the exception of cysteine) to zero. Part of the iodine number of wool is shown to be due to cysteine which is very susceptible to oxidation. The iodine number of wool is therefore affected by reactions of chemical reagents with the amino or the cysteine groups. This method will distinguish, for example, between reversibly adsorbed and chemically combined acid. The latter can be removed by the action of an alkali and this restores the original iodine number of the wool.","PeriodicalId":56324,"journal":{"name":"Bureau of Standards Journal of Research","volume":"12 1","pages":"803"},"PeriodicalIF":0.0,"publicationDate":"1934-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"71342601","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}
引用次数: 1
An absolute determination of the ampere 安培的绝对确定
Bureau of Standards Journal of Research Pub Date : 1934-06-01 DOI: 10.6028/JRES.012.058
H. L. Curtis, R. W. Curbs
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引用次数: 3
Preece test (copper-sulphate dip) for zinc coatings 锌涂层的预浸试验(硫酸铜浸试验)
Bureau of Standards Journal of Research Pub Date : 1934-06-01 DOI: 10.6028/JRES.012.061
E. C. Groesbeck, H. Walkup
{"title":"Preece test (copper-sulphate dip) for zinc coatings","authors":"E. C. Groesbeck, H. Walkup","doi":"10.6028/JRES.012.061","DOIUrl":"https://doi.org/10.6028/JRES.012.061","url":null,"abstract":"","PeriodicalId":56324,"journal":{"name":"Bureau of Standards Journal of Research","volume":"12 1","pages":"785"},"PeriodicalIF":0.0,"publicationDate":"1934-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"71342591","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}
引用次数: 2
A study of the properties of mortars and bricks and their relation to bond 砂浆和砖的性质及其与粘结关系的研究
Bureau of Standards Journal of Research Pub Date : 1934-05-01 DOI: 10.6028/JRES.012.056
L. A. Palmer, D. A. Parsons
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引用次数: 27
Effect of experimental conditions on the measurement of air permeability of paper 实验条件对纸张透气性测量的影响
Bureau of Standards Journal of Research Pub Date : 1934-05-01 DOI: 10.6028/JRES.012.055
F. T. Carson
{"title":"Effect of experimental conditions on the measurement of air permeability of paper","authors":"F. T. Carson","doi":"10.6028/JRES.012.055","DOIUrl":"https://doi.org/10.6028/JRES.012.055","url":null,"abstract":"","PeriodicalId":56324,"journal":{"name":"Bureau of Standards Journal of Research","volume":"12 1","pages":"587"},"PeriodicalIF":0.0,"publicationDate":"1934-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"71342096","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}
引用次数: 2
Freezing point of rhodium 铑的冰点
Bureau of Standards Journal of Research Pub Date : 1934-05-01 DOI: 10.6028/JRES.012.049
W. F. Roeser, H. Wensel
{"title":"Freezing point of rhodium","authors":"W. F. Roeser, H. Wensel","doi":"10.6028/JRES.012.049","DOIUrl":"https://doi.org/10.6028/JRES.012.049","url":null,"abstract":"","PeriodicalId":56324,"journal":{"name":"Bureau of Standards Journal of Research","volume":"12 1","pages":"519"},"PeriodicalIF":0.0,"publicationDate":"1934-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"71342039","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}
引用次数: 11
Hosiery testing machine 袜子测试机
Bureau of Standards Journal of Research Pub Date : 1934-05-01 DOI: 10.6028/JRES.012.052
H. Schiefer, W. Appel
{"title":"Hosiery testing machine","authors":"H. Schiefer, W. Appel","doi":"10.6028/JRES.012.052","DOIUrl":"https://doi.org/10.6028/JRES.012.052","url":null,"abstract":"The machine described in this paper provides a convenient means for measuring the behavior of a woman's full-fashioned stocking when the upper part of the leg of the stocking is repeatedly distended in a way which subjects it to forces similar to those which occur at the knee and at the garter clasps of a stocking in use. Two smooth \"jaws\" are inserted in the upper part of the stocking. It is held by two garter clasps attached at the welt and by a weight fastened to the ankle. The jaws are repeatedly separated and brought toward each other by a reciprocat- ing mechanism in such a way that the circumference of the stocking, that is, the distance around the jaws, is varied between 13.3 and 21.3 inches. Means are provided for recording on a chart the relationship between the load exerted on the stocking and the circumference of the stocking for each cycle of loading and unloading. The number of cycles is recorded by a counter. The test may be continued until holes or runs are produced in the stocking. Typical results of tests are given. The effect of laundering on the behavior of the stockings is also shown.","PeriodicalId":56324,"journal":{"name":"Bureau of Standards Journal of Research","volume":"12 1","pages":"543"},"PeriodicalIF":0.0,"publicationDate":"1934-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"71342056","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}
引用次数: 1
Establishment of a scale of color temperature 建立色温标尺
Bureau of Standards Journal of Research Pub Date : 1934-05-01 DOI: 10.6028/JRES.012.050
H. Wensel, D. B. Judd, W. F. Roeser
{"title":"Establishment of a scale of color temperature","authors":"H. Wensel, D. B. Judd, W. F. Roeser","doi":"10.6028/JRES.012.050","DOIUrl":"https://doi.org/10.6028/JRES.012.050","url":null,"abstract":"","PeriodicalId":56324,"journal":{"name":"Bureau of Standards Journal of Research","volume":"12 1","pages":"527"},"PeriodicalIF":0.0,"publicationDate":"1934-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"71342048","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}
引用次数: 17
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