A comparison of the properties of bacteriocins formed by Lactococcus lactis subsp. lactis strains of diverse origin

Preparation of Antimicrobial Membranes: Coextrusion of Poly(lactic acid) and Nisaplin in the Presence of Plasticizers

“…PLA is easily processable and water resistant. Thin PLA membranes are good water vapor barriers and have relatively low gas transmittance − . Furthermore, as the progress in fermentation technology advances, the cost of PLA production decreases, and it may be able to beat the petroleum-derived thermoplastics some day.…”

Modern Methods of Bioengineering in Production of Probiotics

“…To obtain the lawn of the test culture, a 24h-old culture of B. coagulans,grown at 55 °C on the agar organic medium (g/l): glucose: 10.0, peptone: 5.0, NaCl: 5.0, agar: 20.0 with an addition of Hottinger's broth (at a concentration of 28mg% according to ammonium nitrogen) at pH 7.0 was plated in Petri dishes. Cultural properties of the isolated strains were examined by classical microbiological methods of identification and determination of the culture [13,14]. The phylogenetic analysis using the sequences of the 16S rRNA genes was performed using the programs Vector NTI: Contig Express and AlignX.…”

“…One of the most known bakteriotsin-the antibiotic of lowlands allowed for use as food preservative under the E234 code. The antimicrobial activity of lactic acid bacteria was determined by the diffusion into agar by measuring of the growth inhibition zone of test cultures in mm [14]. The spectrum of inhibitory effects of the strains was studied by culturing strains under steady-state conditions in the fermentation medium of the above composition.…”

“…Solutions of the preparations served as the standards: "Nisaplin" (activity 1 000 000 IU/g, "Aplin & Barrett, Ltd" Co., UK) -for Gram-positives; chloramphenicol (HiMedia Laboratories Ltd, Mumbai)-for Gram-negative bacteria; nystatin (4670 U/mg, Sigma)-for fungi. The fungicidal activity was assessed with indicator culture Aspergillus niger 369 [14]. Physiological and biochemical features of new strains were studied Quantitative determination of the antimicrobial activity was performed by measuring the zones of growth suppression with subsequent calculation involving a calibration plot for standard nisin solutions.…”

“…Physiological and biochemical features of new strains were studied Quantitative determination of the antimicrobial activity was performed by measuring the zones of growth suppression with subsequent calculation involving a calibration plot for standard nisin solutions. Solutions of the preparations served as the standards [14].…”