Simultaneous intraparticle diffusion, reaction and aerobic
The diffusion of glucose and maltose in different polyacrylamide gels (PAAG) was investigated. The method applied was non-steady-state diffusion into gel beads from a finite solution.
The change in glucose concentration in agarose gel with the diffusion distance and the diffusion kinetics of glucose in agarose gels reveal that glucose diffuses freely within these gel matrixes with a high diffusion coefficient 鈭? 脳 10 -10 m 2 /s for 0.5% and 1.5% agarose gels.
Biofouling of Polymer Hydrogel Materials and its Effect
Biofouling of Polymer Hydrogel Materials and its Effect on Diffusion and Enzyme-Based Luminescent Glucose Sensor Functional Characteristics Show all authors. Jason R. Roberts 1. D. Diffusion of glucose and maltose in polyacrylamide gel.
Diffusion in polyacrylamide gels W. Brown and R. M. Johnsen Institute of Physical Chemistry, University of Uppsala, Box 532, S-751 21 Uppsala, Sweden (Received 1 5 January 1 980; revised 24 July 1980) Using a novel sorption technique, the diffusion of some series of solutes in polyacrylamide gels has been investigated with regard to: (a) molecular size of solute; (b) concentration of solute
Modelling of enzyme hydrolysis of maltose in a single
The reversible hydrolysis of maltose to glucose by immobilized glucoamylase entrapped in spherical solid particles is studied theoretically. For this purpose a known kinetic model taking into account these reversible reactions and the competitive synthesis of iso-maltose was adopted.
specificity for maltose and maltodextrins observed in intact cells, it has been proposed that the lamB protein produces a totally nonspecificchannel, andthat thespecificity is derived entirely from the interaction of periplasmic maltose-binding protein with the lamBprotein (7). Toexamine the function of the lamB protein in vitro, we
Maltose metabolism of Pseudomonas fluorescens. - Europe
Pseudomonas fluorescens W uses maltose exclusively by hydrolyzing it to glucose via an inducible alpha-glucosidase (alpha-D-glucoside glucohydrolase, EC 3.2.1.20). No evidence for phosphorolytic cleavage or oxidation to maltobionic acid was found in this organism. The alpha-glucosidase was totally intracellular and was most active at pH of 7.0.
subtilis immobilized in polyacrylamide gel and screened for the production of antibiotics by shake flask fermentation at 30oC by checking activity against Micrococcus luteus (ATCC#10240) through antibiotics diffusion assay. Maximum production of peptide antibiotic was optimized at pH 6-9, incubation time 0-144 hours and glucose concentration 1-5 %.
Laws of the Formation and Diffusion Properties of Silica
The physicochemical and mass-transfer properties were studied for two gels that can be applied in the fabrication of bioreactors using additive manufacturing. The fundamental difference between these gels lies in the mechanisms of their formation from solutions. The first one is a silicic acid gel, which is formed in a chemical reaction and has an irreversible gelling process.
The reaction mixture was incubated for 16 h at 37掳C and then air dried for 2 h. Samples were dissolved in electrophoresis sample buffers and then polyacrylamide gel electrophoreses was performed (ExcelGel TM SDS, Homogeneous 12,5, Amersham Pharmacia Biotech, Uppsala Sweden, 600 V, 30 mA, 7 h). Gels were photographed under UV light (360 nm).
Glucose- and Glucokinase-Controlled mal Gene Expression
The Escherichia coli maltose system (4, 52) is geared for the efficient utilization of maltose and maltodextrins.Ten mal genes encode proteins found in all compartments of the cell. The lambda receptor in the outer membrane (43, 49) facilitates the diffusion of maltodextrins into the periplasmic space, where they are taken up into the cytoplasm via a binding-protein-dependent ABC transporter
The reversible hydrolysis of maltose to glucose by immobilized glucoamylase entrapped in spherical solid particles is studied theoretically. For this purpose a known kinetic model taking into account these reversible reactions and the competitive synthesis of iso-maltose was adopted.
- Does anionic polyacrylamide biodegrade?
- ent only.1 BACKGROUNDAnionic polyacrylamide is the copolymer of acryl mide and acrylic acid. No studies on the environmental fate of polyac ylamide are available. As a high-molecular weight, water-soluble polymer, it is not expected to biode rade or bioaccumulate. Anionic polyacrylamide has a low acute toxicity concer
- Which comonomer is used for the production of anionic polyacrylamides?
- The workhorse comonomer for the production of anionic polyacrylamides is acrylate salts of acrylic acid. These anionic polymers can be prepared as various mono- and divalent metal salts and other positively charged inorganic and organic counterions of the polymerization of acrylic acid with acrylamide (see Fig. 34.4 ).
- What type of polyacrylamide is used in oil industry?
- The polyacrylamide use can be anionic, cationic, or nonionic with various ratios of the comonomers used in the case of the anionic and cationic polymers. The anionic polyacrylamides in the oil field industry are designated by the generic name of partially hydrolyzed polyacrylamide (PHPA), although they are in actuality copolymers .
- Is polyacrylamide a cationic or nonionic polymer?
- rade or bioaccumulate. Anionic polyacrylamide has a low acute toxicity concer CO-CHEMICAL PROPERTIESPolyacrylamide polymers can exist in cationic, anionic or non-ionic forms, depending on their ionic charge. The non-ionic form of polyacrylamide is generated from the basic polyme
