An apparatus for rapid density determinations is described in which small keratin samples may be dried and anhydrous solvent subsequently distilled onto them, the density being measured by finding the temperature at which the sample neither floats nor sinks. Densities of a representative series of keratins are reported and used to assess relative crystallinity. The measured densities are compared with those predicted by various models of α-keratin structure.
Get full access to this article
View all access options for this article.
References
1.
Astbury, W.T. , Proc Roy. Soc.B141. I (1953)
2.
Astbury, W.T. and Woods, H.J. Phil Trans. Roy Soc.A232, 333 (1953).
3.
Chibnall, A.C. , Proc. Roy. Soc.B131. 136 (1942).
4.
Corfield, M.C. , and Robson, A., Proc. Intern Wool Textile Res. Conf C, 79 ( 1955).
5.
Goodings, A.C. , TEXTILE RESEARCH JOURNAL20. 454 (1950).
6.
Hermans, P.H.Contribution to the Physics of Cel lulose Fibers , Elsevier, London ( 1946).
7.
King, A.T., J. Textile Inst.17. T53 (1926).
8.
Leach, S.J. and Parkhill, E.M., Proc. Intern Wool Textile Res Conf C. 92 (1955).
9.
MacArthur, L. , Proc. Roy. Soc.B141. 33 (1953); Nature152. 38 (1943).
10.
McMeekin, T.L. , and Marshall, K.Science116. 142 (1952).
11.
Pauling, L. , and Corey, R.B.Nature171, 59 (1953).
12.
Preston, J.M.J. Textile Inst.24. T273 ( 1933).
13.
Schroeder, W.A., and Kay, L.M., J. Am. Chem. Soc.77, 3901 (1955 ).
14.
Simmonds, D.H. , Australian J. Biol. Sci.8, 537 (1955).
15.
Simmonds, D. H., private communication.
16.
Speakman, J.B. , Stott. E., and Chang, H., J. Textile Inst.24. T273 ( 1933).
17.
Stock, C.R., and Scofield, E.R., TEXTILE RESEARCH JOURNAL21, 521 (1951)
18.
Ward, W.H., Binkley, C.H., and Snell, N.S., TEXTILE RESEARCH JOURNAL25, 314 (1955).
19.
Ward, W.H., and Lundgren, H.P., Advances in Protein Chem. 9, 244Academic Press (New York) (1954)
