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[求助]
请问文献“CA 50: 697b”含义
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| 各位大侠好，看了一篇古老的论文，参考文献是CA 50: 697b，查出来是美国化学文摘，但CA之后都是啥意思啊？还有如何查找呢？非常感谢。 |
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wangzhipengj
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yaolan123: 金币+2, 感谢应助，奖励一下 2013-06-23 21:27:55
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用网络版的CA查询即可，就可得知具体是什么文献的，查询结果如下，1或2，不知哪个是你需要的，自己选择下吧 1. A rapid determination of total pinenes in a mixture of terpenes By: Bardyshev, I. I.; Chernyaeva, O. I.; Litvinova, A. N. The method is based on changes of temp. owing to the isomerization, polymerization, and partial esterification of α- and β-pinenes (I) with AcOH and H2SO4 under standardized exptl. conditions avoiding the reaction of other turpentine constituents. The app. consisted of a thermostat, a Dewar flask, two 10-cc. pipets (with siphoned lower parts which made it possible to keep them inserted in the thermostat), two thermometers (one inside the Dewar flask, the other outside), and a hand stirrer. The temp. was kept at 25 ± 0.1°. The reagent was prepd. by mixing 100% AcOH and 50% H2SO4 in vol. proportions 10:1. α-Pinene (b. 155-6°, nD20 1.4653-1.4656, d420 0.8578-0.8582) was used as the standard. A plot of the temp. differences, Δt, against the contents of α-pinene in the mixt. gave a straight line. Since at low concns. of I it took around 30 min. to reach the max. temp. a mixt. of pure α-pinene and the substance being analyzed was prepd. in the ratio 1:1. The amt. of I in this case was calcd.: x = 2 (a - 50), where a represented α-pinene in the mixt. In the presence of larger quantities of β-pinene 1.5% was subtracted from a. Smaller quantities of camphene did not interfere. This method is superior to the fractionation method. Gidroliznaya i Lesokhimicheskaya Promyshlennost Volume8 IssueNo. 2 Pages15-17 Journal 1955 CODEN:GLKPA2 ISSN:0016-9706 2. Mixed (lichenoid and macular) cutaneous amyloidoses Toribio J; Quinones P A; Virgil T R; Santa-Cruz C S Between October 1972 and Paril 1974 a total of four patients suffering from lichen amyloidosus were admitted to the wards of the Department of Dermatology, University Hospital, Valladolid. All these patients also showed a macular amyloidosis associated with the lichenoid eruption. The authors emphasize that macular amyloidosis is quite commonly found as an associated and closely related condition in lichen amyloidosus. Acta dermato-venereologica Volume55 Issue3 Pages221-6 Journal; Article; (JOURNAL ARTICLE) 1975 ISSN:0001-5555 Journal Code:0370310 Sweden |
gmway3楼2013-06-23 17:49:54
baiyuefei
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