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The Proteins of the Wheat Kernel

The Proteins of the Wheat Kernel


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This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1907 Excerpt: ...in 150 cc. of alcohol of 0.90 sp. gr. and the solution poured into 1000 cc. of absolute alcohol. This produced a turbid liquid, which, on adding a drop or two of sodium-chloride solution, gave a heavy precipitate that rapidly settled, leaving the alcohol colored yellow. This precipitate was again dissolved in diluted alcohol, and precipitated by pouring into ether in order to remove anything soluble in this liquid. No coloring matter was thus removed. The precipitate was then digested with absolute alcohol, yielding preparation 81. The strong alcoholic solution from which this preparation had separated on longer standing deposited a small amount of substance which, when dehydrated, yielded preparation 82. Analysis showed these two substances to have the composition shown in the following table: These figures show that the protein extracted from the "shorts" has the same composition as that similarly obtained from the flour. Prote1n Extracted By Alcohol From Whole-wheat Flour. As Ritthausen and probably others used whole-wheat flour in extracting the various proteins described by them as soluble in dilute alcohol, it was thought best to carry out some extractions with meal obtained by grinding the entire wheat kernel in the laboratory. Preparations 83-88. One kilogram of whole spring-wheat flour, freshly ground, was made into a dough, and the gluten obtained from this by washing with water was then chopped fine and thoroughly extracted with alcohol of 0.90 sp. gr., the yellow extract concentrated, and the protein separated by cooling. The deposit thus produced was dissolved as far as possible in dilute alcohol, and the insoluble substance, which was coagulated protein, was washed with dilute alcohol, absolute alcohol, and ether. This was preparatio...


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Product Details
  • ISBN-13: 9781130410013
  • Publisher: Rarebooksclub.com
  • Publisher Imprint: Rarebooksclub.com
  • Height: 246 mm
  • No of Pages: 46
  • Spine Width: 3 mm
  • Width: 189 mm
  • ISBN-10: 1130410013
  • Publisher Date: 01 Mar 2012
  • Binding: Paperback
  • Language: English
  • Returnable: N
  • Weight: 100 gr


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