Modern Methods Of Plant Analysis

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Moderne Methoden Der Pflanzenanalyse Modern Methods Of Plant Analysis

Moderne Methoden Der Pflanzenanalyse Modern Methods Of Plant Analysis written by K. Paech and has been published by Springer Science & Business Media this book supported file pdf, txt, epub, kindle and other format this book has been release on 2012-12-06 with Science categories.

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. (4) An excess of acetone and a few drops of a concentrated aqueous solution of sodium iodide are added to the combined Skellysolve B extract and washings and allowed to stand overnight in a refrigerator.

Modern Methods Of Plant Analysis

Modern Methods Of Plant Analysis written by Karl Paech and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1955 with Botanical chemistry categories.

Modern Methods Of Plant Analysis

Modern Methods Of Plant Analysis written by Karl Paech and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1955 with Botanical chemistry categories.

Modern Methods Of Plant Analysis

Modern Methods Of Plant Analysis written by Karl Paech and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1955 with Botanical chemistry categories.

Modern Methods Of Plant Analysis

Modern Methods Of Plant Analysis written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1956 with Plants categories.

Modern Methods Of Plant Analysis

Modern Methods Of Plant Analysis written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1955 with categories.

Modern Methods Of Plant Analysis 1956 1964

Modern Methods Of Plant Analysis 1956 1964 written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1955 with categories.

Modern Methods Of Plant Analysis

Modern Methods Of Plant Analysis written by H. F. Linskens and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1985 with categories.

Modern Methods In Plant Analysis

Modern Methods In Plant Analysis written by Karl Paech and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1964 with Enzymes categories.

Modern Methods Of Plant Analysis

Modern Methods Of Plant Analysis written by B.D. Sanwal and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1963 with categories.