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The kinetics of glucose liberation from lactose by b-galactosidase from A. niger was studied in a wide range of the main variables. The anal. shows that the kinetic models proposed so far are not adequate. The main finding is that the reaction rate is not ...
The pH-dependence of the reaction kinetics of lactase (b-galactosidase) [9031-11-2] from A. oryzae in different reaction media is presented in terms of a 2-parameter model. The lactase from A. oryzae seems to have replaced the A. niger lactase on the marke ...
Within the overall objective of developing a low dead volume technology for basic microfluidic valving, shunting and switching functionalities, the use of microbubbles is proposed. As a case study, a normally-closed, bubble-based microvalve design is prese ...
Yeast strains were examd. for their ability to produce glycerol, and Kluyveromyces marxianus NRRLY-665 was chosen for further optimization due to its comparatively high growth rate (0.15/h) and glycerol yield (9.5% by wt. on lactose) at 37 Deg and pH 7. Op ...
A novel heat-flux calorimeter was used to study the aerobic batch growth of the facultative yeast K. fragilis on glucose [50-99-7], galactose [59-23-4], lactose [63-42-3], and deproteinized whey permeate. The calorimetric data enabled optimization of the d ...
The influence of temp. on the catalytic activity and deactivation of sol. enzymes which are com. used in batch processes is discussed. Since high temp. not only accelerates the desired enzymic reaction but also the undesired deactivation of the enzyme, it ...
Optimum growth conditions for the fermn. of nonconcd. whey permeate by K. fragilis NRRL 665 were defined. Use of 3.75 g yeast ext./L, a growth temp. of 38 Deg and a pH of 4.0 allowed a max. productivity of 5.23 g EtOH [64-17-5]/L-h in continuous culture wi ...
