Abstract The technique of irreversible electroporation has been successfully applied to cause a lethal effect on Lactobacillus brevis cells suspended in phosphate buffer solution, Na 2 HPO 4 /NaH PO · H O (0.845/0.186 m M ) between parallel plane electrodes. Tests were carried out at different temperatures (24,45,60, and 80°C) determine if there was synergistic temperature electric pulse treatment the destruction L. . Experimental results indicate that viability (log N / 0 ; where are number...

Formation of drug/polymer complexes through ionic interactions has proven to be very effective for the controlled release drugs. The stability such can greatly influenced by solution pH and strength. aim current work was evaluate potential γ ‐polyglutamic acid ( ‐PGA) as a carrier anticancer drug, Doxorubicin (DOX). We investigated formation between ‐PGA DOX using scanning electron microscopy, spectroscopy, thermal analysis, X‐ray diffraction. Our studies demonstrate that specifically...

Abstract There are many dynamic methods for measuring the volumetric mass transfer coefficient. The “gas out–gas in” method can directly determine coefficient in a bioreactor system and provide estimates of microbial oxygen uptake rate average saturation concentration at gas–liquid interface. errors on these parameters large if dissolved probe response time is not considered. For reliable measurements, deconvolution measurements must be made. © 1995 John Wiley & Sons, Inc.

Abstract Microbial polysaccharides are rapidly emerging as a new and important source of polymeric materials. These biopolymers have novel unique properties already found wide range applications in the food, pharmaceutical, other industries. In view impending importance an industrial commodity, there is renewed interest area product process development. This paper summarizes state‐of‐the art polysaccharide fermentations. An attempt being made to review following areas: rheological...

Eight strains of Kluyveromyces marxianus were screened, and all them found to ferment the aldopentose d -xylose directly ethanol under aerobic conditions. One these strains, K. SUB-80-S, was grown in a medium containing 20 g per liter, following results obtained: maximum concentration, 5.6 g/liter; yield, 0.28 (55% theoretical); specific growth rate, 0.12 h −1 ; 100% utilization completed 48 h.

The Continuous fermentation of Jerusalem artichoke juice to ethanol by free cells Kluyveromyces marxianus UCD (FST) 55-82 has been studied in a continuous-stirred-tank bioreactor at 35 degrees C and pH 4.6. A maximum yield 90% the theoretical was obtained dilution rate 0.05 h(-1). About 95% sugars were utilized rates lower than 0.15 Volumetric productivity volumetric biomass reached values 7 g ETOH/L/h 0.6 dry wt/L/h, respectively, 0.2 maintenance energy coefficient for K. culture found be...

Abstract The kinetics of microbial growth and product formation are described as applied to the high cell concentration scheme rotorfermentor. A bench scale pilot plant was designed built in order demonstrate operational feasibility fermentation glucose ethanol by Saccharomyces cerevisiae ATCC 4126 used. When rotorfermentor used with a feed 104 g/liter almost 100% utilization obtained productivity rate 27.3 g ethanol/liter hr which found be about 10 times greater than from an ordinary...