29 research outputs found
Infectious Sensitivity of BALB/c Mice to Infestation with <I>Photorhabdus asymbiotica</I> and <I>Photorhabdus temperata</I>
) KOE). Identified are the patho-morphological changes in the organs of animals, inoculated with
Photorhabdus spp. strains
Prospects of using extremely low doses of physical factors impact in food biotechnology
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