Download or read book Moderne Methoden der Pflanzenanalyse Modern Methods of Plant Analysis written by K. Paech and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 774 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.
Download or read book Modern Methods of Plant Analysis written by B.D. Sanwal and published by . This book was released on 1963 with total page 512 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Modern methods of plant analysis written by and published by . This book was released on 1955 with total page 626 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Modern Methods of Plant Analysis written by Karl Paech and published by . This book was released on 1955 with total page 766 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Modern Methods of Plant Analysis written by Karl Paech and published by . This book was released on 1955 with total page 544 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Moderne Methoden Der Pflanzenanalyse written by and published by . This book was released on 1956 with total page 542 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Modern methods of plant analysis written by Karl Paech and published by . This book was released on 1962 with total page 535 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Moderne Methoden Der Pflanzenanalyse written by and published by . This book was released on 1962 with total page 512 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Modern Methods of Plant Analysis written by K. Paech and published by . This book was released on 1956 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Modern Methods of Plant Analysis Vol 1 Moderne Methoden Der Pflanzenanalyse written by K. Paech (ed) and published by . This book was released on 1955 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Modern Methods of Plant Analysis written by Karl Paech and published by . This book was released on 1955 with total page 648 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Modern Methods of Plant Analysis Moderne Methoden der Pflanzenanalyse written by K. Paech and published by Springer Science & Business Media. This book was released on 2013-11-11 with total page 639 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Modern Methods of Plant Analysis written by Hans Ferdinand Linskens and published by . This book was released on 1964 with total page 735 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Modern Methods of Plant Analysis written by Karl Paech and published by . This book was released on 1964 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Modern Methods of Plant Analysis written by K. Peach and published by . This book was released on 1962 with total page 535 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Modern Methods of Plant Analysis written by and published by . This book was released on 1955 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Modern Methods of Plant Analysis 1956 1964 written by and published by . This book was released on 1955 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
