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This article is devoted to the investigation of microcrystalline cellulose (MCC). X-ray diffraction analysis allowed estimating the radius of microcrystalline cellulose particles (whiskers), while the dielectric spectroscopy method gave an insight into the mean-square change of the dipole moment per unit volume and the concentration of relaxers as a result. The moisture content of the MCC samples was estimated using thermogravimetric analysis. According to the experimentally obtained data, we propose a model to describe the dipole relaxation in MCC as being caused by reorientation of hydroxymethyl groups only on the surface of a microcrystalline cellulose particle.

A binary n-pentanol-nitromethane solution in the homogeneous state near the critical stratification point is acoustically studied in a frequency range of 5÷2800 MHz. The experiment confirmed the existence of the anomalous ultrasound attenuation, which can be analyzed in terms of the effective ultrasound absorption. On the basis of experimental data, the regular and fluctuation components of the effective ultrasound absorption coefficient of the solution are resolved. It is shown that the fluctuation part of the effective absorption coefficient can be described in the framework of the Ferrell-Bhattacharjee theory of heat capacity relaxation. On the basis of this theory with the use of the obtained experimental data, the crossover scaling function is determined, and its parameters and Ω 1/2 are found. K e y w o r d s: binary solutions, critical stratification point, ultrasound absorption coefficient, crossover function.

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Collagen is the most abundant protein in vertebrates, which constitutes about 30% of the total proteins and has been widely used in food, cosmetic, biomedical, and pharmaceutical industries. The conventional source of collagen is from bovine and pig. However, the outbreak of prion diseases, such as bovine spongiform encephalopathy, has with prion diseases. In addition, their skin, bones, scales, are rich in collagen type I. A simple method has been used 0 C ed using animal model of obesity. For this purpose, the rats were fed with a high-calorie diet, which consisted of a for four weeks. After that the animals were orally administrated with marine collagen fragments extracted from the Found changes could be result of decrease of food intake and increase of water intake in compare with the rats in HCD group.