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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
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.
通过研究丁香酚异构体的结构与反应性的关系，合成了邻丁香酚、3-烯丙基-2-甲氧基酚和沙维酚。结果表明，制备3-烯丙基-2-甲氧基苯酚的最佳方法为五步法。采用气相色谱法对丁香酚和沙维酚进行了分离。
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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

The thermodynamic pK value of picric acid was determined spectrophotometrically in water containing hydrochloric acid to repress the ionization. The pK value 0.33 (K ≈ 0.46) was obtained from data at 450 mμ. Attempts to determine the pK 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 pK value is compared with previously published values.

苦味酸的热力学 pK 值是在含有盐酸的水中用分光光度法测定的，盐酸可以抑制离子化。根据 450 mμ 下的数据得出 pK 值为 0.33（K ≈ 0.46）。试图通过苦味酸的电位滴定法和苦味酸溶液在近饱和范围内的分光光度法来确定 pK 值的结果并不令人满意。新的 pK 值与之前公布的值进行了比较。
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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
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.
肉眼观察用于纯度测定的细胞中化合物的冻结和融化，揭示了一些迄今为止意想不到的行为。这种行为与纯度测量中遇到的某些困难有关，特别是当样品非常纯净时。提出了部分减少这些困难的方法，并描述了提高纯度测量精度的方法。
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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
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.
测量了1850 ~ 2150 cm - 1范围内CO2红外吸收谱线的频率。观测是在各种压力和路径下进行的，最高可达72米大气压。得到了表征C12O2的111c0-000、111d0-000、031c0-000、031d0-000、200-011c0、I22c0-011c0、122d0-011d0跃迁的振动旋转常数。同时测量了C13O2分子产生的111c0-000波段。
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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
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.
描述了一种用于转移反应物质的惰性气氛室。它的优点是价格便宜，容易清洗，可以抽真空。
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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
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.
一个系统的方法提出拟合经验表达式的数据取决于两个变量。这个问题也可以被描述为依赖于一个参数的一系列曲线的同时拟合。提出的方法将曲面拟合问题简化为拟合一个变量的几个函数的问题。首先，用这些单变量函数来表示曲面，并使用双向方差分析的扩展，评估这种拟合的准确性，而不必在此时确定单变量函数的性质。然后，用常规的曲线拟合程序对单变量函数进行拟合。为了说明，将该方法应用于两组实验数据。
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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
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.
给出了六羟基苯(苯己醇)、四羟基对苯醌、红二酸、三醌(环己烯酮)、西红花酸和白花酸(环戊戊酮)的制备和纯化的可靠方法。某些衍生物和颜色测试，以及红外和紫外光谱，报告了它们的识别。
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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
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.
针对第三介质为复折射率金属的情况，建立了受挫全反射理论。使用平行偏振光，在一定的薄膜厚度处反射率最小。对该理论进行了实验验证，表明该理论适用于金属表面与介质表面之间的接触薄膜的精确测量。
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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
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.
在688 ~ 2991 A范围内观测到了Pd III谱，并对之前的分析进行了修正和扩展。本文报道的Pd III谱线有1110条，其中917条被划分为57个偶能级和111个奇宇称的组合。这种解释得到了预期能级近似位置的理论预测的帮助。从4d 8, 4d 7 ns 1和4d 6 5s 1 5p 1配置的谱项被指定。8个极限项在4d7ns1构型中。用里兹公式从(ns 1) 3,5 F系列(n=5,6)得到的早期电离电位33.0电子伏特保持不变。
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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

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.

实验数据以温度和密度的紧密间隔呈现。实验密度的范围是临界密度的0.064到2.8倍。此外，还提供了参数密度和温度以及压力和温度的均匀插值表。
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引用次数: 0
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