Competitive exclusion of Salmonella enterica serovar Enteritidis by a mixed culture of Lactobacillus crispatus and Clostridium lactatifermentans was studied in a sequencing fed-batch reactor mimicking the cecal ecophysiology of broiler chickens. Growth of serovar Enteritidis was inhibited by a mixed culture of L. crispatus and C. lactatifermentans at pH 5.8 but not by a monoculture of L. crispa...

Wine yeast starters that contain a mixture of different industrial yeasts with various properties may soon be introduced to the market. The mechanisms underlying the interactions between the different strains in the starter during alcoholic fermentation have never been investigated. We identified and investigated some of these interactions in a mixed culture containing two yeast strains grown u...

BACKGROUND Syngas fermentation, the bioconversion of CO, CO2, and H2 to biofuels and chemicals, has undergone considerable optimization for industrial applications. Even more, full-scale plants for ethanol production from syngas fermentation by pure cultures are being built worldwide. The composition of syngas depends on the feedstock gasified and the gasification conditions. However, it remain...

INTRODUCTION Candida Albicans (CA) is by far the most common yeast of oral infections, including endodontic infections. The aim of this study was to evaluate and compare the antifungal effect of white-colored mineral trioxide aggregate (WMTA) and Portland Cement (PC) using a tube-dilution test. MATERIALS AND METHODS WMTA and PC were tested freshly mixed and after 24 h. The experiment was perf...

Some factors affecting induction and repression of steroid-transforming enzymes were studied in single and mixed cultures of Arthrobacter simplex, Nocardia restrictus and Streptomyces roseochromogenes. In single or mixed cultures induction and repression of I -dehydrogenase, I 6a-hydroxylase, and 20-ketoreductase were found to be dependent on the type of steroid substrate and the composition of...

Simultaneous saccharification and fermentation (SSF) experiments were performed at selected temperatures (37, 41, and 43 degrees C) to obtain comprehensive material balance and performance data for several promising strains of thermotolerant yeast. Parameters measured were ethanol concentration, yeast cell density, and residual sugar and cellulose concentrations. The three yeasts Saccharomyces ...

We have recently established a clonal culture system that supports the growth of immature natural killer (NK) cells from murine fetal thymocytes. We now describe a culture system for mixed NK cell colony formation from single lymphohematopoietic progenitors. When Sca-1+c-kit+ fetal liver cells were cultured in methylcellulose media with interleukin (IL)-2, IL-7, IL-11, and steel factor (SF), we...

In vitro culture of male and female gonads was found to have significant effects on gonadal structure and development. Culture resulted in a reduction of testicular cord diameter and a reduction in the number of Sertoli cells lining each cord in cross section. In the female, culture increased the percentage of pyknotic oocytes and fewer germ cells per unit of ovary volume reached diplotene. Mix...

The objective of this work was to study the effect of mixed culture solid substrate fermentation of C. tropicalis ZD-3 with A. niger ZD-8 on detoxification of cottonseed meal (CSM), and to investigate the effect of fermentation period, proportion of CSM in substrate, sodium carbonate, minerals and heat treatment on the reduction of free gossypol levels during mixed culture solid substrate ferme...

Cage culture is one of the important methods for intensive culture of tilapia in large water impoundments. But, information related to growth performance of androgen-treated monosex tilapia population during cage culture under the ecological conditions of India is limited. The aim of this study was to compare the growth potential of control, mixed-sex and androgen-treated, monosex tilapia in co...