Showing papers in "Process Biochemistry in 1989"

TL;DR: An overview of the state-of-the art in the production of the enzyme and its application in the manufacture of 6-aminopenicillanic acid, the key intermediate in semi-synthetic penicillins production is presented.

TL;DR: In this article, various parameteres of a two-phase dispersion process were investigated, including k-carrageenan concentration, mixing speed, mixing time, and aqueous volumetric fraction.

TL;DR: A series of flask, pre-fermenter, and large-sized bioreactor experiments was carried out using dry-milled milo as feedstock and Zymomonas mobilis as the reacting micro-organism as mentioned in this paper.

TL;DR: In this article, a pilot reactor with a protease from an alkalophile was constructed to recover silver from used X-ray films, which can process automatically and continuously 900-1000 kg of films a day on bench scale.

TL;DR: In this article, semi-solid fermentation of orange pulp bagasse with Aspergillus niger and Rhizopus SM can increase the concentration of the protein of the residue by up to 300%.

TL;DR: In this paper, the effect of operating parameters on the recovery of xanthan from aqueous solution using ethanol precipitation was investigated. And the results showed that the salt type and ethanol concentration are the most important variables.

TL;DR: In this article, the continuous bacterial oxidation of ferrous iron was studied in a packed-bed bioreactor, where low-grade copper ore was used as a support and Thiobacillus ferrooxidans as an inoculum.

TL;DR: In this article, the results obtained from two strategies of spore production of Penicillium roquefortii by solid state fermentation techniques are presented, one involves growing the fungus on support particles which may consist of a natural starchy substrate e.g., buckwheat grains, or inert porous particles such as pozzolano impregnated with a liquid nutrient.

TL;DR: Partially purified α-galactosidase from two-day old germinating guar was used for the hydrolysis of raffinose and stachyose present in soybean milk as discussed by the authors.

TL;DR: Inoculum cascading successfully replaces the more expensive recycling or individual seeding of fermenters with new microbial biomass as discussed by the authors, and has been used in industrial scale fermentation trials up to 64,000 litres.

TL;DR: A first step towards characterize ultrafiltration membranes using porosimetry and contact angle measurements to help the user to draw useful conclusions concerning membrane performance in practical applications is described.

TL;DR: Calculations of biomass and energy yield, together with the specific rates of glucose consumption and chlorophyll production, all confirm that the optimum pH for growth, substrate consumption and overall yield falls within the range 6.5 to 7.0.

TL;DR: Mixed cultures of Trichoderma reesei D1-6 and Aspergillus wentii Pt 2804 synthesised less cellulase and xylanase in the stirred tank bioreactor studies compared to the shake flask studies.

TL;DR: The protein and fat contents of the maize malts decreased as germination time increased, and the maize malt diastatic power, α-amylase activity, colour, fat, protein, cold and hot water extracts, and malting loss increased.

TL;DR: Aspen and pine woodchips were prehydrolysed by SO 2 in a Wenger cooker-extruder and the hemicellulose sugars washed out and the resulting glucose-containing slurries were fermented by Zymomonas mobilis and Saccharomyces cerevisiae.

TL;DR: A survey of commercially available biochemical products produced on a large scale has been carried out and shortage of data for the safe levels of these products in the air of biotechnological production plants has been highlighted.

TL;DR: Baker's yeast, Saccharomyces cerevisiae, was entrapped on Manville glass fibre discs by means of alginate, and the enzymes cellulase and β-glucosidase were precipitated on the yeast by tannin to create a continuous dynamic immobilised biocatalyst bioreactor.

TL;DR: Klebsiella oxytoca at concentrations of 24-60 gl −1 were used in a membrane cell-recycle bioreactor for the continuous production of 2,3-butanediol from glucose and the performance and fouling characteristics of the hollow fibre membrane were studied.

TL;DR: The problem of marketing a highly viscous enzyme preparation was solved by reducing the viscosity by 78% by conditioning the crude extract with 1% (w/v)CaCl 2 •2H 2 O at 29 o C for 60 minutes.

TL;DR: The co-immobilisation of amyloglucosidase and Saccharomyces cerevisiae within alginate matrix for the production of ethanol from starch hydrolysate is described and a cell concentration of 20% was found to give the maximum combined catalytic activity.

TL;DR: The use of total CO 2 measurements permits to estimate S. thermophilus population all along its growth, in pure as well as in mixed cultures.

TL;DR: A recovery process allowing for purification factors up to more than 70 was developed and operated on pilot-scale in a continuous pilot plant, and the product yield of the denaturation step was almost 100%.

TL;DR: It was determined that cellular doubling time in hypersosmotic pressure medium can be predicted using an empirical correlation of osmotic pressure and elapsed time.