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Entrapment carrageenan

N. Francou, P. Vignais (1984) Hydrogen production by Rhodopseudomonas capsulata cells entrapped in carrageenan beads. Biotechnol. Lett., 6 639-644... [Pg.68]

Entrapment within Porous Matrices Cordierite, pore glass, acrylamide, alginate, collagen, K-carrageenan... [Pg.120]

Another way is to entrap cells within porous matrices formed in situ. Various gelatinous materials such as acrylamide, alginate, collagen and K-carrageenan, can be mixed with cell suspensions and be gelled into various shape and sizes. [Pg.121]

Campanella et al. [75] Polyphenols, hydrogen peroxide, KO2, lecithin Olive oil and other vegetable oils Egg yolk Ground soya seed oil Tyrosinase or catalase or superoxide dismutase or phospholipase D/choline oxidase were entrapped in kappa-carrageenan gel Oxygen electrode -... [Pg.274]

What Tye (1988) called entrapping technology involves dropwise gelation in a KC1 bath of an emulsified solute and carrageenan (1% in distilled water). The dried (and presumably washed) gel capsules were reportedly capable of retaining in the carrageenan network any dissolved or emulsified cosolute. [Pg.69]

Plant cell cultures represent a potentially rich source of secondary metabolites of commercial importance and have been shown to produce them in higher concentrations than the related intact plants. However, plant cell cultures often produce metabolites in lower concentrations than desired and commonly store them intracellularly. These limitations can be overcome by product yield enhancement procedures, including immobilization of cultured cells, and permeabilization, or ideally using a combined immobilization/ permeabilization process with retained plant cell viability. Complex coacervate capsules consisting of chitosan and alginate or carrageenan proved to be effective biomaterials for entrapment, controlled permeabilization of cells and to allow control of capsule membrane diffusivity. [Pg.67]

Transformations with immobilized enzymes or cells Often the stability of the biocatalyst can be increased by immobilization and many different enzymes and cells have been immobilized by a variety of different methods. The most popular method for the fixation of whole cells is entrapment or encapsulation with calcium alginate. Other natural gels e.g., carrageenan, collagen, chemically-modified natural polymers e.g., cellulose acetate and synthetic gels and polymers e.g., polyacrylamide or polyhydroxyethylmethacrylate can also be used for this type of immobilization. [Pg.847]

Immobilization of L1210 leukemia cells, human foreskin fibroblast cells, and yeast cells by entrapment in carrageenan or adsorption on filter paper for placement on electrodes Drug screening through changes in cell viability and respiration [61]... [Pg.219]

Entrapment Agar, dextrane, alginate, carrageenan, collagen, polyacrylate, polysiloxane, polyvinylalcohol, polyethyleneglycol Calcium phosphate gel... [Pg.275]

The synthesis of indole alkaloids from the common precursors tryptamine and secologanin by cell cultures of C, roseus has been studied in detail (IT). Cells entrapped in agar, agarose, or carrageenan produce ajmalicine isomers at about the same rate as the freely suspended cells, while cells entrapped in alginate showed up to 160 fold increased synthesis. A major reason for this increased synthesis is believed to be the restricted growth of the entrapped cells, as has been discussed above for Capsiaum. The yield of ajmalicine is above 12 times as much product formed from added precursors as by de novo synthesis. In this case too, alginate entrapped cells were much more productive than freely suspended cells (140% increase), and were also used to synthesize the related alkaloid serpentine in a batch procedure (17). [Pg.72]

For further improvement of these immobilization systems, we investigated many sjmthetic and natural polymers as a matrix for entrapping enzymes and microbial cells into gel lattice. As a result, we [8, J] found that "K-carrageenan" is one of the most suitable polymer for Immobilization of microbial cells. [Pg.187]

The properties of Escherichia coli cells entrapped in /c-carrageenan and then glutaraldehyde-cross-linked have been investigated and used for the production of L-aspartic acid. L-Tryptophan has been synthesized by E. coli cells entrapped in polyacrylamide. A correction to a previously published paper on the synthesis of L-tryptophan by immobilized E. coli cells has been noted. ... [Pg.671]


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See also in sourсe #XX -- [ Pg.173 , Pg.174 ]




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