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Journal of Research of the National Bureau of Standards. Section A, Physics and Chemistry最新文献

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A Study of the Chemiluminescence of the Pb + O3 Reactions. Pb + O3反应的化学发光研究。
Journal of Research of the National Bureau of Standards. Section A, Physics and Chemistry Pub Date : 1976-03-01 Epub Date: 1976-04-01 DOI: 10.6028/jres.080A.018
M J Kurylo, W Braun, S Abramowitz, M Krauss
{"title":"A Study of the Chemiluminescence of the Pb + O<sub>3</sub> Reactions.","authors":"M J Kurylo,&nbsp;W Braun,&nbsp;S Abramowitz,&nbsp;M Krauss","doi":"10.6028/jres.080A.018","DOIUrl":"https://doi.org/10.6028/jres.080A.018","url":null,"abstract":"<p><p>The chemiluminescent reaction of Pb + O<sub>3</sub> has been studied using both \"cold\" and vibrationally excited O<sub>3</sub>. Emission from new states <i>a</i> and <i>b</i> has been observed in addition to the A and B states. The reaction of vibrationally excited O<sub>3</sub> with Pb to yield PbO(A) appears to be faster than that using \"cold\" O<sub>3</sub>.</p>","PeriodicalId":17018,"journal":{"name":"Journal of Research of the National Bureau of Standards. Section A, Physics and Chemistry","volume":"80A 2","pages":"167-171"},"PeriodicalIF":0.0,"publicationDate":"1976-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5296185/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"37757421","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: 9
Energy Levels, Classified Lines, and Zeeman Effect of Neutral Thorium. 中性钍的能级、分类线和泽曼效应。
Journal of Research of the National Bureau of Standards. Section A, Physics and Chemistry Pub Date : 1976-03-01 Epub Date: 1976-04-01 DOI: 10.6028/jres.080A.023
Romuald Zalubas
{"title":"Energy Levels, Classified Lines, and Zeeman Effect of Neutral Thorium.","authors":"Romuald Zalubas","doi":"10.6028/jres.080A.023","DOIUrl":"10.6028/jres.080A.023","url":null,"abstract":"<p><p>A list of about 9500 classified lines of Th I in the range 2345-29 662 Å is given. Lines in the range 2345-9239 A were observed and measured at NBS. Zeeman effect data for 2281 lines are listed. Lists of 254 even and 322 odd levels including their <i>g</i> values are presented. Among them there are 72 new levels, which were not contained in earlier publications.</p>","PeriodicalId":17018,"journal":{"name":"Journal of Research of the National Bureau of Standards. Section A, Physics and Chemistry","volume":"80A 2","pages":"221-358"},"PeriodicalIF":0.0,"publicationDate":"1976-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5296189/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"37757424","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
Extinction Coefficients of NO2 and N2O4. NO2和N2O4消光系数。
Journal of Research of the National Bureau of Standards. Section A, Physics and Chemistry Pub Date : 1976-03-01 Epub Date: 1976-04-01 DOI: 10.6028/jres.080A.017
Arnold M Bass, Albert E Ledford, Allan H Laufer
{"title":"Extinction Coefficients of NO<sub>2</sub> and N<sub>2</sub>O<sub>4</sub>.","authors":"Arnold M Bass,&nbsp;Albert E Ledford,&nbsp;Allan H Laufer","doi":"10.6028/jres.080A.017","DOIUrl":"https://doi.org/10.6028/jres.080A.017","url":null,"abstract":"<p><p>The extinction coefficient of NO<sub>2</sub> has been measured in the spectral range 185 to 410 nm as a function of temperature between 235 and 298 K. In order to correct for the effect of the dimer absorption, the extinction coefficient of N<sub>2</sub>O<sub>4</sub> has also been measured. The effect of a decrease in temperature upon the NO<sub>2</sub> absorption is a reduction in the extinction coefficient of approximately 10 percent in the range 320 to 380 nm.</p>","PeriodicalId":17018,"journal":{"name":"Journal of Research of the National Bureau of Standards. Section A, Physics and Chemistry","volume":"80A 2","pages":"143-166"},"PeriodicalIF":0.0,"publicationDate":"1976-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5296184/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"37757420","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: 109
Structure- and Solvent-Property Relationships for the Electronic Energies of Charge-Transfer Complexes Between Certain Benzene Derivatives. 某些苯衍生物之间电荷转移络合物电子能量的结构和溶剂特性关系。
Journal of Research of the National Bureau of Standards. Section A, Physics and Chemistry Pub Date : 1976-03-01 Epub Date: 1976-04-01 DOI: 10.6028/jres.080A.019
Harold Argentar
{"title":"Structure- and Solvent-Property Relationships for the Electronic Energies of Charge-Transfer Complexes Between Certain Benzene Derivatives.","authors":"Harold Argentar","doi":"10.6028/jres.080A.019","DOIUrl":"10.6028/jres.080A.019","url":null,"abstract":"<p><p>A chemical model is proposed for describing charge-transfer complexes between aromatic amines and electron-accepting benzene derivatives containing a group having a double- or triple-bond conjugated with the benzene ring. According to this model, an electron migrates from the nitrogen atom of the amine to one of the atoms of the multiple-bonded group during charge-transfer interaction. Structure-property relationships were derived for correlating: (1), the transition energies of the complexes; (2), the ionization, or oxidation, potentials of the amines, and (3), the electron affinities or reduction potentials of the electron acceptors, with the electron-donating abilities of the substituents of the various compounds. Transition energies calculated from reported spectroscopic data for these complexes were correlated using equations derived in this study. Similarly correlated were reported data for the above properties of the amine and electron acceptor. Equations were derived for correlating the effect of variation in solvent on the transition energies of the complexes. Correlation of reported spectroscopic data indicated that the greatest effect is caused by variation in the refractive index; of secondary importance was the change in dielectric constant.</p>","PeriodicalId":17018,"journal":{"name":"Journal of Research of the National Bureau of Standards. Section A, Physics and Chemistry","volume":"80A 2","pages":"173-187"},"PeriodicalIF":0.0,"publicationDate":"1976-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5296186/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"37757422","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
PVT and Vapor Pressure Measurements on Ethane. 乙烷的 PVT 和蒸汽压力测量。
Journal of Research of the National Bureau of Standards. Section A, Physics and Chemistry Pub Date : 1976-01-01 Epub Date: 1976-02-01 DOI: 10.6028/jres.080A.006
G C Straty, R Tsumura
{"title":"PVT and Vapor Pressure Measurements on Ethane.","authors":"G C Straty, R Tsumura","doi":"10.6028/jres.080A.006","DOIUrl":"10.6028/jres.080A.006","url":null,"abstract":"<p><p>New measurements of the vapor pressures and <i>PVT</i> properties of ethane are reported. <i>PVT</i> determinations have been made from near the triple point to 320 K at pressures to 33 MPa. The density range investigated extends to more than three times the critical density. The new measurements of the vapor pressures of ethane extend from 160 K to near the critical point.</p>","PeriodicalId":17018,"journal":{"name":"Journal of Research of the National Bureau of Standards. Section A, Physics and Chemistry","volume":"80A 1","pages":"35-39"},"PeriodicalIF":0.0,"publicationDate":"1976-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5291311/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"37757619","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
Relative Enthalpy of Solid Beryllium Aluminate (Chrysoberyl), BeO · Al2O3, from 1175 to 2025 K, and of Liquid Beryllium Aluminate from 2170 to 2350 K. 固态铝酸铍（金绿宝石）BeO - Al2O3 在 1175 至 2025 K 和液态铝酸铍（2170 至 2350 K）的相对焓。
Journal of Research of the National Bureau of Standards. Section A, Physics and Chemistry Pub Date : 1976-01-01 Epub Date: 1976-02-01 DOI: 10.6028/jres.080A.012
S Ishihara, E D West
{"title":"Relative Enthalpy of Solid Beryllium Aluminate (Chrysoberyl), BeO · Al<sub>2</sub>O<sub>3</sub>, from 1175 to 2025 K, and of Liquid Beryllium Aluminate from 2170 to 2350 K.","authors":"S Ishihara, E D West","doi":"10.6028/jres.080A.012","DOIUrl":"10.6028/jres.080A.012","url":null,"abstract":"<p><p>The relative enthalpy of solid beryllium aluminate BeO · Al<sub>2</sub>O<sub>3</sub> from 1180 to 2025 K and liquid beryllium aluminate from 2170 to 2350 K was measured by \"drop\" calorimetry using an adiabatic \"receiving type\" calorimeter. The thermodynamic functions from 1175 to 2025 K and the enthalpy of melting at 2146 K are reported.</p>","PeriodicalId":17018,"journal":{"name":"Journal of Research of the National Bureau of Standards. Section A, Physics and Chemistry","volume":"80A 1","pages":"65-73"},"PeriodicalIF":0.0,"publicationDate":"1976-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5291316/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"37757624","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
Optical Properties of Nuclear Matter. 核物质的光学性质。
Journal of Research of the National Bureau of Standards. Section A, Physics and Chemistry Pub Date : 1976-01-01 Epub Date: 1976-02-01 DOI: 10.6028/jres.080A.004
J S O'Connell
{"title":"Optical Properties of Nuclear Matter.","authors":"J S O'Connell","doi":"10.6028/jres.080A.004","DOIUrl":"https://doi.org/10.6028/jres.080A.004","url":null,"abstract":"<p><p>The index of refraction and absorptive properties are estimated in nuclear matter consisting of protons and neutrons and in nuclear matter charge neutralized by electrons.</p>","PeriodicalId":17018,"journal":{"name":"Journal of Research of the National Bureau of Standards. Section A, Physics and Chemistry","volume":"80A 1","pages":"9-13"},"PeriodicalIF":0.0,"publicationDate":"1976-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5291317/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"37757625","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
A Study of the Polarization of Fluorescence of Ordered Systems With Application to Ordered Liquid Crystals. 有序系统荧光极化研究--在有序液晶中的应用》（A Study of Polarization of Fluorescence of Ordered Systems With Application to Ordered Liquid Crystals.
Journal of Research of the National Bureau of Standards. Section A, Physics and Chemistry Pub Date : 1976-01-01 Epub Date: 1976-02-01 DOI: 10.6028/jres.080A.005
E D Cehelnik, K D Mielenz, R B Cundall
{"title":"A Study of the Polarization of Fluorescence of Ordered Systems With Application to Ordered Liquid Crystals.","authors":"E D Cehelnik, K D Mielenz, R B Cundall","doi":"10.6028/jres.080A.005","DOIUrl":"10.6028/jres.080A.005","url":null,"abstract":"<p><p>The fluorescence polarization of uniaxial molecules dissolved in an ordered medium is studied. A theoretical model is developed which relates the polarization of the fluorescence emission to molecular structure, orientation of absorption and emission dipole oscillators and the degree of ordering. This theory was tested experimentally using all trans 1,6-diphenyl-1,3,5-hexatriene dissolved in an ordered liquid crystal.</p>","PeriodicalId":17018,"journal":{"name":"Journal of Research of the National Bureau of Standards. Section A, Physics and Chemistry","volume":"80A 1","pages":"15-33"},"PeriodicalIF":0.0,"publicationDate":"1976-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5291309/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"37757616","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
Experimental Values for the Elastic Constants of a Particulate-Filled Glassy Polymer. 微粒填充玻璃态聚合物弹性常数的实验值
Journal of Research of the National Bureau of Standards. Section A, Physics and Chemistry Pub Date : 1976-01-01 Epub Date: 1976-02-01 DOI: 10.6028/jres.080A.008
Jack C Smith
{"title":"Experimental Values for the Elastic Constants of a Particulate-Filled Glassy Polymer.","authors":"Jack C Smith","doi":"10.6028/jres.080A.008","DOIUrl":"10.6028/jres.080A.008","url":null,"abstract":"<p><p>Young's modulus and Poisson's ratio have been measured simultaneously on a series of particulate composites containing volume fractions of filler up to 0.50. The composites consisted of small glass spheres imbedded in a rigid epoxy polymer matrix. The measured values were compared with theoretical values calculated from current theories. A recently generalized and simplified version of van der Poel's theory provided the best agreement. It predicted values of Young's modulus for composites with filler volume fractions up to 0.35. Measured values of Poisson's ratio exhibited scattering, but were consistent with values calculated from van der Poel's theory.</p>","PeriodicalId":17018,"journal":{"name":"Journal of Research of the National Bureau of Standards. Section A, Physics and Chemistry","volume":"80A 1","pages":"45-49"},"PeriodicalIF":0.0,"publicationDate":"1976-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5291313/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"37757621","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
Functional Equations for the Enhancement Factors for CO2-Free Moist Air. 无二氧化碳湿空气增强因子的函数式。
Journal of Research of the National Bureau of Standards. Section A, Physics and Chemistry Pub Date : 1976-01-01 Epub Date: 1976-02-01 DOI: 10.6028/jres.080A.007
Lewis Greenspan
{"title":"Functional Equations for the Enhancement Factors for CO<sub>2</sub>-Free Moist Air.","authors":"Lewis Greenspan","doi":"10.6028/jres.080A.007","DOIUrl":"10.6028/jres.080A.007","url":null,"abstract":"<p><p>Equations are presented which explicitly express the enhancement of water vapor in CO<sub>2</sub>-free air from 0.1 to 2 MPa. The equations are approximations to the formulation of Hyland and provide the means of obtaining enhancement with very modest computational facilities. The agreement with Hyland's enhancement values is well within his estimated uncertainty.</p>","PeriodicalId":17018,"journal":{"name":"Journal of Research of the National Bureau of Standards. Section A, Physics and Chemistry","volume":"80A 1","pages":"41-44"},"PeriodicalIF":0.0,"publicationDate":"1976-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5291312/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"37757620","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
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