Showing papers in "Journal of Fermentation and Bioengineering in 1989"

TL;DR: From the results of substrate specificity, the enzyme should be named l -iditol:NAD + -5-oxidoreductase (EC 1.1.14, sorbitol dehydrogenase).

TL;DR: In this paper, the authors investigated the nitrogen transformation of sewage sludge composting without or with rice husks as a bulking agent and found that when rice hulls were added, nitrogen loss was reduced and the conversion of carbon and nitrogen were correlated with the change of the C/N ratio of initial composting materials.

TL;DR: One of the isolated mutants, SN-G42, had superior properties to the wild strain in the following three points, which made it possible to produce erythritol on a commercial scale.

TL;DR: A hormone-like factor which triggers blue pigment production in Streptomyces sp. FRI-5, named IM-2, was purified 170,000-fold from a culture broth of the strain with 14% activity recovery as discussed by the authors.

TL;DR: A methanol yeast, Candida boidinii no. 2201, could produce xylitol and also d-xylulose during cultivation on d- xylose medium, which were identified by high performance liquid chromatography and a possible pathway ofxylitol production was discussed.

TL;DR: In this paper, cells of Thiobacillus thioparus TK-m were immobilized on cylindrical porous polypropylene pellets (5 mmφ × 5 mm) which were packed in an acrylic cylinder of 50 mm inner diameter up to the height of 800 mm.

TL;DR: In this article, micro-gel beads (200-1,200 μm in diameter) were produced by atomization of a sodium alginate solution or a sodium-alginate-perfluorocarbon mixture with a rotating disk.

TL;DR: In this article, the characteristics of cross-flow filtration, using tubular ceramic membranes in liquid single-phase, gas-liquid two-phase and gas- liquid-solid three-phase flow systems were investigated.

TL;DR: Simulations indicate, that under intracellular conditions the NAD + -xylitol dehydrogenase is regulated by the catabolic reduction charge and not by the total concentrations of NAD + and NADH.

TL;DR: A new immobilization method which prevents cell leakage from the polymeric matrix into the medium was developed and when this system was tested for continuous fermentation, normal ethanol production was maintained for 300 h without cell leakage.

TL;DR: Pellet formation occurred under rather low stress conditions as compared to stirred tanks where high agitation conditions are expected to be required to achieve similar results.

TL;DR: Batch production of gluconic acid in the presence of a high concentration of glucose was investigated using free and immobilized mycelia of Aspergillus niger IAM 2094 with the aim of achieving repeatable constant production.

TL;DR: The percentage of beads which developed cracks during fermentation was highly reduced and without the addition of CaCl 2 into the fermenting broth, the gel beads were stable for nine consecutive batch fermentations.

TL;DR: In this article, the authors isolated a l -lactate producing cocci which grows at 37°C as the optimal temperature and pH of 7.0 that is capable of converting glucose to l − lactate with a conversion rate greater than 90%.

TL;DR: The amino acid composition of the Oscillatoria algal protein compares favorably with the tentative standard for ideal protein defined by FAO/WHO and could be maintained for 6 months without contamination.

TL;DR: Aeration stabilized the flocculating activity of yeasts, allowing a long-term operation of the fermentor at a high dilution rate of 0.5 h−1, which resulted in ethanol productivity of 30 g/l·h, a value which corresponds to 78% of the theoretical value of0.51.

TL;DR: Shirato's expression theory, which is based on Ruth's filtration theory and Terzaghi's consolidation theory, was applied to an analysis of the dewatering characteristics in activated sludges.

TL;DR: No reduction in ethanol productivity and yield was observed for up to 29 repeated batch fermentations in the attachment of Saccharomyces cerevisiae cells on the cheap and abundant ore Kissiris.

TL;DR: Phanerochaete chrysosporium INA-12 immobilized with polyurethane foam produced high lignin peroxidase levels in 24-h repeated batch culture when the biomass was partially regenerated on day 5.

TL;DR: The immobilized enzymes prepared by adsorption on porous glass, covalent binding on chitosan beads treated with glutaraldehyde, and ionic binding on Amberlite IRC-50 had high Pase activities and the optimum pH of Pase shifted from 5.0, which is optimum for the native B. acidopullulyticus enzyme, to 3.5 for IRC-Pase and GA-CB-P enzyme.

TL;DR: The cell density and the antibody productivity were found to be almost equal to the cultivation with cells separation from the culture mixture by gravitation, and the maximum viable cell density exceeded 10 7 cells/ml in both the JTC-3 line and the X87 line.

TL;DR: In this article, an immobilized naringinase from Penicillium sp. was used in a column reactor for the hydrolysis of ρ-nitrophenyl-α- l -rhamnoside or Naringin in simulated fruit juice system or grapefruit juice.

TL;DR: The results suggest that the rate-limiting enzyme of GSH production in S. cerevisiae is γ-glutamylcysteine synthetase (GSH-I) rather than GSH-II, and that the concomitant enhancement of both G SH-I and Gsh-II activities might be very effective for GSH hyperproduction.

TL;DR: In this paper, the effect of DO and acetic acid concentration on acetobacter aceti was examined both for a washed-cell suspension and in continuous culture, and the optimum DO concentration was determined with a cell suspension was 3-7 ppm for oxygen consumption on ethanol; 2-15 ppm for the enzyme activities of alcohol dehydrogenase and acetaldehyde dehydrogenases.

TL;DR: The critical load of methyl mercaptan, in which the gas can be completely removed, was determined as 0.48 g-S/kg-activated carbon fabric/d as mentioned in this paper.

TL;DR: In this article, a continuous ethanol fermentation of concentrated glucose and molasses solutions was coupled with membrane distillation using a PTFE ethanol stripping module, which was found to remove a high concentration of ethanol from the fermentation broth and thus maintain a low ethanol concentration in the broth, thereby alleviating the problem of product inhibition.

TL;DR: By numerical analysis of fermentation results of the batch culture of this microorganism, it was found that the specific rates for cell growth, substrate consumption, and product formation were clearly expressed by the end product inhibition formulae.

TL;DR: The immobilization of Saccharomyces cerevisiae cells on γ-alumina pellets was examined by electron microscope and by measurement of the electrokinetic charge of the cells and the γ’s of the pellets.

TL;DR: In this paper, changes in the purple nonsulfur bacterial content and metabolic activity of photosynthetic sludge in response to wastewater strength in a practical plant and in laboratory-scale batch reactors were investigated.

TL;DR: In this paper, a strain of Bacillus megaterium had complex effects on kraft lignin degradation in media with 0.1% and 0.5 % glucose, a 5% decrease and a 15% increase were observed respectively.