ISSN:
0022-3832
Keywords:
Chemistry
;
Polymer and Materials Science
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Chemistry and Pharmacology
,
Physics
Notes:
The denaturation of arachin and conarachin II with urea, guanidinium chloride and thiocyanate, and of arachin with alkali metal thiocyanates and lithium halides has been examined using sedimentation velocity and viscosity techniques. The effect of various anions on the alkaline denaturation of arachin has also been investigated. It was found that with reagents which denature arachin and conarachin II at similar rates, the arachin half molecule was not observed as an intermediate stage in the arachin denaturation with the exception of lithium chloride. The denaturation of arachin with urea and guanidinium chloride was faster at pH 10 than at pH 8. The denaturing power of the alkali metal thiocyanates decreased in the order Li, Na, K, and of lithium halides in the order Lil, LiBr, LiCl. It was found that in the case of denaturation with guanidiniun and alkali metal salts, the cation appeared to be the main denaturant but anions inhibited the denaturation with the exception of the thiocyanate ion which was either noninhibiting or was itself a denaturant. With ionic denaturants in general the nature of both ions was important.
Additional Material:
9 Ill.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1002/pol.1958.1203212416
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