Research Article

Influence of Physical and Chemical Modification on the Optical Rotatory Dispersion and Biological Activity of Chitosan Films

Figure 1

(a) ORD curves for CTS-87 (1, 3) and CTS-640 (2, 4) films in the acetic (1, 2) and basic (3, 4) forms, as recorded on PolAAr 3001 (1, 3) and SPU-E (2, 4) spectropolarimeters. The moisture content of the film samples was 22 ± 2 (1) and 12 ± 1 wt.% (2). Vertical bars show the variation range of values for different orientation angles of the film sample. (b) ORD curves of 0.5% solutions of CTS-87 (1) and CTS-640 (2) in 2% acetic acid, as recorded on an SPU-E spectropolarimeter [11].
825296.fig.001a
(a)
825296.fig.001b
(b)