Original scientific paper

Stochastic Order in Macromolecular Solutions: a SANS Experiment

Rita Giordano ; Lab. Leon Brillouin C.E.N. Saclay 91191 Gif sur Yvette-Cedex, France
Antonino Grasso ; 1st. Teen. Spettr. C.N.R., C.P. 55 S. Agata, 98166 Messina, Italy
José Teixeira ; Lab. Leon Brillouin C.E. N. Saclay 91191 Gif sur Yvette-Cedex, France
Franco Wanderlingh ; Dpt. di Fisica, Univ. di Messina, C.P. 55 S Agata, 98166 Messina, Italy
Ulderico Wanderlingh ; Dpt. di Fisica, Univ. di Messina, C.P. 55 S Agata, 98166 Messina, Italy

Abstract

A SANS experiment has been performed in solutions of /S-lactoglobulin at different concentrations. According to previous results, a definite structure factor can be extracted, besides a careful evaluation of the form factor. The results are discussed within the frame of a phenomenological stochastic model that allows parametrization of the experimental results in terms of preferred lengths. The occurrence of preferred lengths, almost independent from the concentration, suggests the existence of well defined local structures in which both spatial and rotational orders are involved. A suggestion from the numerical values of the implied parameters points to a distance of 120 Å that would characterize the interaction potential.

Keywords

Hrčak ID:

137182

URI

https://hrcak.srce.hr/137182

Publication date:

15.8.1992.

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