Effects of Three Feed Additives on the Culturable Microbiota Composition and Histology of the Anterior and Posterior Intestines of Zebrafish ().

In this study, the effect of three promising feed additives (chelated compounds of trace elements, butyric acid, lycopene) on changes in the culturable microbiota and histological parameters of two sections of the intestines of (zebrafish) was studied. The use of these feed additives can help to eliminate the deficiency of trace elements, modulate the composition of the microbiota due to the postbiotic properties of butyric acid, and reduce oxidative stress when using lycopene. Incorporation of the investigated supplements in the feed resulted in a significant change in the relative abundance of certain groups of microorganisms.

Mechanisms of low-temperature vapor-gas streams formation from sulfide mine waste.

This paper presents experimental data that revealed the potential for chemical element transport by low-temperature vapor-gas streams. The study was conducted on sulfide waste heap sites located in the Kemerovo region, Russia. Condensates of vapor-gas streams were collected and analyzed in the air above the waste heaps and during laboratory experiments using samplers specially designed for this purpose.

[Sensitivity of pathogens of post-ventilation pneumonia in newborns to antibacterial drugs].

The majority of the enteric bacteria and aerobic and anaerobic cocci causing postventilation pneumonia in newborns were susceptible to gentamicin, carbenicillin, ampicillin and cephalosporins. The strains of Pseudomonas aeruginosa were mainly susceptible to gentamicin and carbenicillin. Bacteroides were susceptible to metronidazole, ceftazidime and lincomycin.

[A nutrient medium for isolating Lactobacilli].

The composition of and method for preparation of nutrient medium for the isolation of Lactobacilli from biologic material are described. The medium is simple to prepare, consists of only Soviet reagents, this making it available for laboratories in this country.

[A method of determining the effect of breast milk on the adhesive properties of microorganisms].

The authors have modified the method for studies of the microorganism adhesive properties in the presence of breast milk; this modification is based on the ability of bacterial cells to adhere to the surface of human red cells of I (0) Rh (+) blood group. The study has revealed significant differences in the adhesion characteristics of S. aureus 209, B.