CREATION OF MATHEMATICAL MODEL OF EXTRACTION BY CHEESE WHEY FROM A LUPINE IN THE FORM OF A PLATE

Prerequisites for creation of model are stated. At a problem definition consideration of a particle of a lupine as unlimited plate is proved. The main assumptions are formulated, regional conditions are written out. Partial solutions of the differential equation, and also the common decision for the current value of a concentration pressure С'(x,у). Distribution of concentration is symmetric concerning ordinate axis. Final expression for a field of concentration at extraction of a flat plate in a dimensionless look is written out. It is shown that distribution of concentration is rather precisely described by the first member of a row. Th e conclusion is drawn that for any timepoint under the set boundary conditions the field of concentration has an appearance of a symmetric curve with a maximum on a plate axis (Х=0). For each subsequent timepoint there will be the curve which is monotonously decreasing to a plate surface. It is proved that it is possible to define nature of change of concentration in a body at a preset value the case when strives for infinity at the set physical parameters, thickness of a plate and the organization of high intensity of branch of extractive substances from a surface Is considered. For this case the equations of rather dimensionless concentration and Fourier's numb er are received. Also the equation for definition of final time of extraction is written out. It is shown that the received solutions of the eq uations of model are found in a good consent with experimental data

Study of the chemical composition of the smell of the dairy-vegetable extract of lupine on the “Piezoelectronic nose”

A great popularity in the food industry in recent years has received lupins due to a unique combination of technological and food properties and accessibility. Lupine is characterized by a high proportion of proteins, its seeds are dominated by readily soluble protein fractions: 20.65% albumins, 50.5% globulins with a high content of essential amino acids. Enrichment of the milk-vegetable extract with native components of lupine is carried out during extraction with intensification by its low-frequency mechanical oscillations. The high content of proteins in the lupine during processing leads to a negative technological change in the organoleptic properties of products - odor. The measurement of the composition of the volatile fraction of odor in the equilibrium gas phase over the samples was carried out in the NIL on the experimental analyzer of smells "MAG 8" with the methodology "electronic nose" (manufactured by LLC Sensorika - New Technologies, Voronezh). To establish the differences in the composition (qualitative and quantitative) of the volatile fraction of smell, the change in the total content of volatile components in the equilibrium gas phase over the samples was traced. According to the shape of the "visual fingerprint" of the maximum responses of all sensors in the array, there are no significant differences in the chemical composition of the equilibrium gas phase over the samples. The native smell of milk whey remained unchanged, but became more qualitatively softer with a tasting assessment due to the fact that 50% of the composition of the volatile fraction of odor was changed by the method of pasteurization. The study of the smell of the native and pasteurized milk and vegetable extract allows us to conclude that the chosen method of pasteurization can be recommended in food technology using a milky-vegetable extract enriched with lupine proteins