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Titlebook: Moderne Methoden der Pflanzenanalyse / Modern Methods of Plant Analysis; K. Paech,M. V. Tracey Book 1955 Springer-Verlag OHG. 1955 Isomer.

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发表于 2025-3-21 16:24:21 | 显示全部楼层 |阅读模式
书目名称Moderne Methoden der Pflanzenanalyse / Modern Methods of Plant Analysis
编辑K. Paech,M. V. Tracey
视频video
丛书名称Modern Methods of Plant Analysis‘ Moderne Methoden der Pflanzenanalyse
图书封面Titlebook: Moderne Methoden der Pflanzenanalyse / Modern Methods of Plant Analysis;  K. Paech,M. V. Tracey Book 1955 Springer-Verlag OHG. 1955 Isomer.
描述If, following the solvent extraction of a hydrocarbon from a plant, it is not known whether it is one or the other, a method of distinguishing the two is described by HENDRICKS, WILDMAN and JONES (1946). The technique involves the infra-red absorption spectra of the two isomers. At about 12 mp. the relative absorption coefficient of rubber is 42% greater than for gutta. ScHLESINGER and LEPER (1951) describe two procedures for separation of the rubber and gutta hydrocarbons from large quantities of crude chicle. In one, the chicle is extracted with benzene which dissolves both isomers. An excess absolute ethyl acetate is added and the mixture stored at 5° C overnight. The gutta precipitates out and the rubber remains in solution. The other method is as follows: (1) Ten grams of chicle are extracted with acetone for 24 hours in a Soxhlet extraction apparatus. (2) The insoluble material in the thimble is allowed to .. it dry, then immersed in 150 ml. of cold Skellysolve B in a refrigerator at 10° C and· allowed to stand for 48 hours with occasional agitation. (3) The thimble is then removed from the solvent and the enclosed residue washed several times with fresh, cold Skellysolve B.
出版日期Book 1955
关键词Isomer; Pflanzenreich; alkaloids; carbon; development; growth; hydrocarbons; physiology; plant; plants; seedli
版次1
doihttps://doi.org/10.1007/978-3-642-64958-5
isbn_softcover978-3-642-64960-8
isbn_ebook978-3-642-64958-5
copyrightSpringer-Verlag OHG. 1955
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发表于 2025-3-21 20:53:47 | 显示全部楼层
Book 1955 is described by HENDRICKS, WILDMAN and JONES (1946). The technique involves the infra-red absorption spectra of the two isomers. At about 12 mp. the relative absorption coefficient of rubber is 42% greater than for gutta. ScHLESINGER and LEPER (1951) describe two procedures for separation of the ru
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Moderne Methoden der Pflanzenanalyse / Modern Methods of Plant Analysis
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发表于 2025-3-22 22:34:47 | 显示全部楼层
Book 1955the thimble is allowed to .. it dry, then immersed in 150 ml. of cold Skellysolve B in a refrigerator at 10° C and· allowed to stand for 48 hours with occasional agitation. (3) The thimble is then removed from the solvent and the enclosed residue washed several times with fresh, cold Skellysolve B.
发表于 2025-3-23 01:49:18 | 显示全部楼层
terial in the thimble is allowed to .. it dry, then immersed in 150 ml. of cold Skellysolve B in a refrigerator at 10° C and· allowed to stand for 48 hours with occasional agitation. (3) The thimble is then removed from the solvent and the enclosed residue washed several times with fresh, cold Skellysolve B. 978-3-642-64960-8978-3-642-64958-5
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