HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS		QUICK SEARCH:   [advanced] Author: Keyword(s): Year:  Vol:  Page:

This Article Full Text (PDF) Alert me when this article is cited Alert me if a correction is posted Services Email this article to a friend Similar articles in this journal Similar articles in PubMed Alert me to new issues of the journal Download to citation manager Request Permissions Citing Articles Citing Articles via Google Scholar Google Scholar Articles by Kahn, L. D. Articles by Witnauer, L. P. Search for Related Content PubMed PubMed Citation Articles by Kahn, L. D. Articles by Witnauer, L. P. Social Bookmarking                      What's this?

The Viscometric Behavior of Solubilized Calf Skin Collagen at Low Rates of Shear

From the ¹ From the Eastern Regional Research Laboratory, Eastern Utilization Research and Development Division, Agricultural Research Service, United States Department of Agriculture, Philadelphia, Pennsylvania 19118

Special Ostwald viscometers with unusually long capillaries were used to study the viscometric behavior of calf skin collagen solubilized in citrate buffer at pH 3.44. Graphs of shearing stress with respect to rate of shear show that at very low rates of shear this system displays Newtonian behavior in capillary flow. Under this condition extrapolation of reduced viscosity to zero concentration gives a value of intrinsic viscosity of 27 dl per g, which is higher than previously accepted values determined under non-Newtonian conditions.

The energy of activation of flow of this system is positive and increases with concentration to a maximum value of 5.8 kcal. Entropy of flow is negative and decreases with concentration.

CiteULike    Complore    Connotea    Del.icio.us    Digg    Reddit    Technorati    What's this?