Prospects of using extremely low doses of physical factors impact in food biotechnology

Abstract

The paper deals with urgent issues of development of resource-saving methods of biotechnological processes intensification. The main purpose of the work is to show the efficiency of using extremely low doses of physical factors impact in food biotechnology. Acoustic and electric treatment was in various modes. Impact capacity did not exceed 10-4 W/kg. The duration of exposure ranged from 5 to 15 min. Barley grains enzymes and lactic acid microorganisms were subjected to treatment. Impact of vibration as a physical factor, its frequency is considered as a priority in controlling growth and biochemical processes in biological objects. Impact frequency in the range of 50–10000 Hz influences the activity of hydrolytic enzymes in bimodal way. It is presented in the article. The coincidence of the frequency ranges of the maximum activity of enzymes in the model reactions with the ones in the grain of barley under the treatment of alternating current and sound is noted. Improvement of all indexes of germinating barley and improvement of the quality of the finished malt were observed in these ranges. Low-intensity acoustic treatment at a frequency of 2000 Hz contributed to an increase in β-galactosidase activity of the CT-95 Str. thermophilus strain. Selected ST-95 Str. thermophilus strain was used in the starter composition for the experimental sample production of fermented melted milk. The fermentation process intensification was observed. The lactose content of this product is 30% less in comparison with the feedstock. The use of traditional starter without a selected strain can reduce the lactose content by an average of 7.5%. The results of biotechnological processes modification by means of the treatment of enzymes and extremely low doses of physical factors impact used in meat technologies are observed. Thus, the prospects of using low-intensity physical effects of vibration in the development of innovative food technologies are substantiated. It is also promising to use these technologies in making absolutely new food products with different qualities.

Prediction model of microbiological and organoleptic indicators of salads during storage with the processing by extremely low frequency electromagnetic fields

“…An effective solution to the issues of safety and prolongation of expiration date of salads is "cold pasteurization", which involves the use of "barriers", including the regulation of the redox potential, exposure to pressure, radiation, electromagnetic fields, competing microflora, food additives, etc., which slow down the growth and reproduction of microorganisms [1][2][3][4].…”

Formation of Orthographic Competence in Future Primary School Teachers during Language Training in Higher Education Institutions

“…There is no doubt that the radio, the press, in particular, the television and the Internet have a significant impact on modern young people. Thus, D. Danilchuk (2013) notes in his study, "After the introduction commercial (non-governmental) radio-and TV broadcasters in Ukraine, the issues of spelling also affected this sector of mass media landscape which has the largest audience" (p. 116). The scholar also notes that "As such giants of commercial television as "1+1", ICTV, STB, "Novyi Kanal", "5 Kanal" and others gained access to nationwide Ukrainian coverage, each of them offered the audience their own view on the norms of the modern Ukrainian literary language" (Danilchuk, 2013, p. 116).…”