The process of self-assembly of riboflavin molecules in aqueous and binary mixtures of solvents was investigated by a spectroscopic method. It was shown that the self-assembly of vitamin B2 molecules by the dipole-dipole interaction of van der Waals forces, as a result of which resonant splitting of excited electronic levels of riboflavin occurs. In concentrated solutions and in binary mixtures of solvents, the observed hypochromic effects are due to a decrease in the intensity of the absorption capacity of self-aggregated riboflavin molecules relative to their monomers. The absorption band of self-assembled riboflavin molecules is determined by the obtained linear dichroism spectra in a laminar hydrodynamic flow.
The frequency dependences of the Faraday rotation angle and the ellipticity angle are studied taking into account light absorption in dielectric media. The extreme values of the above values are determined, as well as the field of their application in dielectric media.
A bioenergy plant with a solar heating system for individual use has been developed and built, intended for the processing and disposal of agricultural waste of organic origin to obtain biogas and liquid high-quality organic fertilizers under conditions of anaerobic fermentation. The main features of heat transfer processes in bioreactors are considered. A mathematical model is proposed that describes these processes. The use of the resulting model will improve the control processes of reactors and comply with technological regimes
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