发布求助
文献互助 智能选刊 最新文献

Journal of research of the National Bureau of Standards. Section A, Physics and chemistry最新文献

筛选
英文 中文
Synthesis of Isomers of Eugenol1 丁香酚1异构体的合成
Journal of research of the National Bureau of Standards. Section A, Physics and chemistry Pub Date : 1963-05-01 DOI: 10.6028/jres.067A.026
G. Brauer, Richard W. Morris, Willard B. Howe
{"title":"Synthesis of Isomers of Eugenol1","authors":"G. Brauer, Richard W. Morris, Willard B. Howe","doi":"10.6028/jres.067A.026","DOIUrl":"https://doi.org/10.6028/jres.067A.026","url":null,"abstract":"In connection with an investigation of the correlation between structure and reactivity of eugenol isomers, o-eugenol, 3-allyl-2-methoxyphenol and chavibetol were synthesized. A five-step synthesis was found to be most suitable for the preparation of 3-allyl-2-methoxyphenol. An improved separation of chavibetol from eugenol was achieved by gas chromatography.","PeriodicalId":94340,"journal":{"name":"Journal of research of the National Bureau of Standards. Section A, Physics and chemistry","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1963-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82624997","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: 3
Spectrophotometric Determination of the Thermodynamic pK Value of Picric Acid in Water at 25 °C. 分光光度法测定 25 °C 水中苦味酸的热力学 pK 值。
Journal of research of the National Bureau of Standards. Section A, Physics and chemistry Pub Date : 1963-05-01 Epub Date: 1963-06-01 DOI: 10.6028/jres.067A.024
Marion Maclean Davis, Maya Paabo
{"title":"Spectrophotometric Determination of the Thermodynamic <i>p</i>K Value of Picric Acid in Water at 25 °C.","authors":"Marion Maclean Davis, Maya Paabo","doi":"10.6028/jres.067A.024","DOIUrl":"10.6028/jres.067A.024","url":null,"abstract":"<p><p>The thermodynamic <i>p</i>K value of picric acid was determined spectrophotometrically in water containing hydrochloric acid to repress the ionization. The <i>p</i>K value 0.33 (<i>K</i> ≈ 0.46) was obtained from data at 450 m<i>μ</i>. Attempts to determine the <i>p</i>K value by potentiometric titrations of picric acid and by spectrophotometric measurements of picric acid solutions in the near-saturation range did not yield satisfactory results. The new <i>p</i>K value is compared with previously published values.</p>","PeriodicalId":94340,"journal":{"name":"Journal of research of the National Bureau of Standards. Section A, Physics and chemistry","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1963-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5319453/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74143141","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Purity Analysis of Highly Purified Materials by Time-Temperature Cryometry 时间-温度冷冻法分析高纯度材料的纯度
Journal of research of the National Bureau of Standards. Section A, Physics and chemistry Pub Date : 1963-05-01 DOI: 10.6028/jres.067A.025
G. Ross, H. D. Dixon
{"title":"Purity Analysis of Highly Purified Materials by Time-Temperature Cryometry","authors":"G. Ross, H. D. Dixon","doi":"10.6028/jres.067A.025","DOIUrl":"https://doi.org/10.6028/jres.067A.025","url":null,"abstract":"Visual observation of the freezing and melting of compounds in cells used for the determination of purity has uncovered some heretofore unexpected behavior. This behavior has been correlated with certain difficulties experienced in the measurement of purity, particularly when the sample is very pure. Means for partially reducing these difficulties are proposed and procedures for increasing the accuracy of purity measurements are described.","PeriodicalId":94340,"journal":{"name":"Journal of research of the National Bureau of Standards. Section A, Physics and chemistry","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1963-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73768371","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: 3
Absorption Bands of Carbon Dioxide* From 5.3 to 4.6 Microns 二氧化碳吸收波段*从5.3到4.6微米
Journal of research of the National Bureau of Standards. Section A, Physics and chemistry Pub Date : 1963-05-01 DOI: 10.6028/jres.067A.020
A. Maki, E. K. Plyler, R. J. Thibault
{"title":"Absorption Bands of Carbon Dioxide* From 5.3 to 4.6 Microns","authors":"A. Maki, E. K. Plyler, R. J. Thibault","doi":"10.6028/jres.067A.020","DOIUrl":"https://doi.org/10.6028/jres.067A.020","url":null,"abstract":"Measurements have been made of the frequencies of the infrared absorption lines of CO2 in the region from 1850 cm−1 to 2150 cm−1. Observations were made at various pressures and pathlengths up to a maximum of 72 meter-atmospheres. Vibration-rotation constants were obtained characterizing the transitions 111c0–000, 111d0–000, 031c0–000, 031d0–000, 200–011c0, I22c0–011c0, 122d0–011d0 for C12O2. The 111c0–000 band due to the C13O2 molecule was also measured.","PeriodicalId":94340,"journal":{"name":"Journal of research of the National Bureau of Standards. Section A, Physics and chemistry","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1963-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78335936","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: 7
A Controlled Atmosphere Chamber 可控气氛室
Journal of research of the National Bureau of Standards. Section A, Physics and chemistry Pub Date : 1963-05-01 DOI: 10.6028/jres.067A.028
C. L. Gordon, R. Johannesen
{"title":"A Controlled Atmosphere Chamber","authors":"C. L. Gordon, R. Johannesen","doi":"10.6028/jres.067A.028","DOIUrl":"https://doi.org/10.6028/jres.067A.028","url":null,"abstract":"An inert atmosphere chamber for the transfer of reactive materials is described. It has the advantages of being inexpensive, easily cleaned, and can be evacuated.","PeriodicalId":94340,"journal":{"name":"Journal of research of the National Bureau of Standards. Section A, Physics and chemistry","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1963-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82959380","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: 0
Analysis of Families of Curves 曲线族的分析
Journal of research of the National Bureau of Standards. Section A, Physics and chemistry Pub Date : 1963-05-01 DOI: 10.6028/jres.067A.027
J. Mandel, F. McCrackin
{"title":"Analysis of Families of Curves","authors":"J. Mandel, F. McCrackin","doi":"10.6028/jres.067A.027","DOIUrl":"https://doi.org/10.6028/jres.067A.027","url":null,"abstract":"A systematic approach is presented for fitting empirical expressions to data depending on two variables. The problem can also be described as the simultaneous fitting of a family of curves depending on a parameter. The proposed method reduces a surface fitting problem to that of fitting a few functions of one variable each. First, the surface is expressed in terms of these one-variable functions, and using an extension of two-way analysis of variance, the accuracy of this fit is assessed without having to determine, at this point, the nature of the one-variable functions. Then, the one-variable functions are fitted by customary curve-fitting procedures. For illustration, the method is applied to two sets of experimental data.","PeriodicalId":94340,"journal":{"name":"Journal of research of the National Bureau of Standards. Section A, Physics and chemistry","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1963-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89560363","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: 10
Cyclic Polyhydroxy Ketones. I. Oxidation Products of Hexahydroxybenzene (Benzenehexol). 环多羟基酮。一、六羟基苯(苯己醇)的氧化产物。
Journal of research of the National Bureau of Standards. Section A, Physics and chemistry Pub Date : 1963-03-01 DOI: 10.6028/JRES.067A.015
A. Fatiadi, H. Isbell, W. Sager
{"title":"Cyclic Polyhydroxy Ketones. I. Oxidation Products of Hexahydroxybenzene (Benzenehexol).","authors":"A. Fatiadi, H. Isbell, W. Sager","doi":"10.6028/JRES.067A.015","DOIUrl":"https://doi.org/10.6028/JRES.067A.015","url":null,"abstract":"Reliable procedures are given for the preparation and purification of hexahydroxybenzene (benzenehexol), tetrahydroxy-p-benzoquinone, rhodizonic acid, triquinoyl (cyclohexanehexone), croconic acid, and leuconic acid (cyclopentanepentone). Certain derivatives and color tests, as well as infrared and ultraviolet spectra, are reported for their identification.","PeriodicalId":94340,"journal":{"name":"Journal of research of the National Bureau of Standards. Section A, Physics and chemistry","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1963-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74739292","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: 24
Theory of Frustrated Total Reflection Involving Metallic Surfaces. 涉及金属表面的受挫全反射理论。
Journal of research of the National Bureau of Standards. Section A, Physics and chemistry Pub Date : 1963-03-01 DOI: 10.6028/JRES.067A.012
T. R. Young, B. Rothrock
{"title":"Theory of Frustrated Total Reflection Involving Metallic Surfaces.","authors":"T. R. Young, B. Rothrock","doi":"10.6028/JRES.067A.012","DOIUrl":"https://doi.org/10.6028/JRES.067A.012","url":null,"abstract":"The theory for frustrated total reflection has been developed for the case where the third medium is metallic of complex index. Using parallel polarized light a unique minimum in reflectance occurs at a definite film thickness. Experimental verification of the theory is made and indicates the theory applicable to the precise measurement of thin contact films existing between metallic and dielectric surfaces.","PeriodicalId":94340,"journal":{"name":"Journal of research of the National Bureau of Standards. Section A, Physics and chemistry","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1963-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77212777","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: 3
Third Spectrum of Palladium (Pd III). 钯(Pd III)的第三光谱。
Journal of research of the National Bureau of Standards. Section A, Physics and chemistry Pub Date : 1963-03-01 DOI: 10.6028/JRES.067A.010
A. G. Shenstone
{"title":"Third Spectrum of Palladium (Pd III).","authors":"A. G. Shenstone","doi":"10.6028/JRES.067A.010","DOIUrl":"https://doi.org/10.6028/JRES.067A.010","url":null,"abstract":"The Pd III spectrum has been observed from 688 to 2991 A, and the earlier analysis has been revised and extended. The number of Pd III lines here reported is 1,110, of which 917 are classified as combinations of 57 even energy levels with 111 of odd parity. The interpretation has been aided by theoretical predictions of the approximate positions of expected energy levels. Spectral terms from the 4d 8, 4d 7 ns 1, and 4d 6 5s 1 5p 1 configurations are designated. Eight limit terms are in the 4d 7 ns 1 configurations. The earlier ionization potential, 33.0 electron volts derived from the (ns 1) 3,5 F series (n=5,6) by means of a Ritz formula, remains unchanged.","PeriodicalId":94340,"journal":{"name":"Journal of research of the National Bureau of Standards. Section A, Physics and chemistry","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1963-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76332467","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: 12
Pressure-Density-Temperature Relations of Fluid Para Hydrogen From 15 to 100 °K at Pressures to 350 Atmospheres. 在压力至350大气压下，15至100°K流体对氢的压力-密度-温度关系。
Journal of research of the National Bureau of Standards. Section A, Physics and chemistry Pub Date : 1963-03-01 DOI: 10.6028/jres.067A.017
Robert D Goodwin, Dwain E Diller, Hans M Roder, Lloyd A Weber
{"title":"Pressure-Density-Temperature Relations of Fluid Para Hydrogen From 15 to 100 °K at Pressures to 350 Atmospheres.","authors":"Robert D Goodwin, Dwain E Diller, Hans M Roder, Lloyd A Weber","doi":"10.6028/jres.067A.017","DOIUrl":"10.6028/jres.067A.017","url":null,"abstract":"<p><p>Experimental data are presented at closely spaced intervals of temperature and density. The range of experimental densities is from 0.064 to 2.8 times the critical density. There are presented, in addition, tables interpolated uniformly in arguments density and temperature, and also in pressure and temperature.</p>","PeriodicalId":94340,"journal":{"name":"Journal of research of the National Bureau of Standards. Section A, Physics and chemistry","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1963-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6640577/pdf/jres-67A-173.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41224877","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
首页 上一页 下一页 尾页
0
×
引用
GB/T 7714-2015
复制
MLA
复制
APA
复制
导出至
BibTeX EndNote RefMan NoteFirst NoteExpress
×
提示
您的信息不完整，为了账户安全，请先补充。
现在去补充
×
提示
您因"违规操作"
具体请查看互助需知
我知道了
×
提示
现在去查看 取消
×
提示
确定
请完成安全验证×
相关产品
×
本文献相关产品
联系我们：info@booksci.cn Book学术提供免费学术资源搜索服务，方便国内外学者检索中英文文献。致力于提供最便捷和优质的服务体验。 Copyright © 2023 布克学术 All rights reserved.
京ICP备2023020795号-1
ghs 京公网安备 11010802042870号
Book学术文献互助
Book学术文献互助群
群 号：481959085
Book学术官方微信