Microsoft Word - 1_Vol.4_2_, 2011, RJC-762 223-241
نویسندگان
چکیده
The dependence of the intrinsic viscosity [η] on the weight average degree of polymerization Pw of chitosans in aqueous acid media is discussed in terms of the Yamakawa-Fujii theory for the worm-like cylinder model. The conformational characteristics (Kuhn statistical segment length and Flory characteristic ratio) are estimated. They increase linearly with the reciprocal of the square root of salt concentration. The "intrinsic" values for uncharged chains are comparable to those for cellulose and lower than those for chitin.
منابع مشابه
(Microsoft Word - IMECS2012_nitrogen_graphene20111130_1_\210\311\223\241\217C\220\263.doc)
We investigated the mechanical properties of nitrogen-containing graphene under tensile loading via molecular dynamics (MD) simulations. In the MD simulation, we used three types of potential functions: the second–generation reactive empirical bond order (REBO) potential for covalent C–C bonds, the Tersoff potential for covalent C–N bonds, and the Lennard–Jones potential for the interlayer inte...
متن کاملCategorizing spelling errors to assess L2 writing
Based on a corpus of 223 argumentative essays written by English as a foreign language learners, this study shows that spelling errors, whether detected manually or automatically, are a reliable predictor of the quality of L2 texts and that reliability is further improved by subcategorizing errors. However the benefit derived from subcategorization is much lower in the case of errors automatica...
متن کاملSolving Fuzzy Partial Differential Equation by Differential Transformation Method
Normal 0 false false false ...
متن کامل