ISSN:
0022-3832
Keywords:
Chemistry
;
Polymer and Materials Science
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Chemistry and Pharmacology
,
Physics
Notes:
Investigations have been made into the sedimentation behavior of solutions prepared by oxidizing Lincoln and Merino wools in peracetic acid and then extracting in 0.15 N ammonium hydroxide solution. There was no apparent difference between the extracts from the two types of wool. The sedimentation pattern showed two peaks of a s ∼ 2S and 1S. The α-keratose, which was precipitated by acidification, showed a similar 2-peak pattern to the original solution, but the amount of the faster component was enhanced. The α-keratose was in the a form, but was partially converted to the α form on treatment in water at 40°C. Fractionation of α-keratose has been carried out from ammonium hydroxide solution, urea solution, and ithium bromide solution. From the first two of these, products have been obtained which contain a high proportion of α1-keratose. The sedimentation coefficient of α1-keratose in ammonium hydroxide at pH 10.5-11 has been determined to be 2.60S at infinite dilution. The effect of storage of the solutions at 18-25°C. is to reduce the amount of α1-keratose and to produce a precipitable component in the β form. In view of this and other obvious signs of degradation, caution must be exercised in interpreting the soluble components in terms of components in the original wool fibers. The dissolution apparently does not differentiate between the ortho-like and para-like material in the wool cortex, and α-keratose therefore represents a component fundamental to both.
Additional Material:
3 Ill.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1002/pol.1959.1203613043
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