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Microcapsules calcium alginate

It has been shown that a modified drug release can be obtained from calcium alginate microcapsules, pellets, and microspheres. When biodegradable bone implants composed of calcium alginate spheres and containing gentamicin were introduced into the femur of rats, effective drug levels in bone and soft tissue were obtained for 30 days and 7 days, respectively. ... [Pg.86]

Dohnal, J., Stepanek, F. Inkjet fabrication and characterization of calcium alginate microcapsules. Powder Technol. 200, 254—259 (2010)... [Pg.250]

Figure 254 Cells enclosed in chitosan/calcium alginate microcapsules prepared by complex coacervation. Micrographs obtained by optical microscopy at 60X. Reproduced with permission from Reference [162]. Figure 254 Cells enclosed in chitosan/calcium alginate microcapsules prepared by complex coacervation. Micrographs obtained by optical microscopy at 60X. Reproduced with permission from Reference [162].
Microcapsules of calcium alginate with an external coating of whey proteins... [Pg.788]

Microcapsules of calcium alginate with a coating of sodium alginate... [Pg.788]

The next two steps are the same as the previous process. In the last step, the entire content of the microcapsule was liquified by citrate. This also liquified the small calcium alginate gel microspheres inside the microcapsule. This way the hepatocytes in the smaller gel microsphere are released to float freely inside the microcapsule. [Pg.911]

Sakai S., Ono T., Ijima H., Kawakami K. Aminopropyl-silicate membrane for microcapsule-shaped bioartificial organs control of molecular permeability. J. Membr. Sd. 2002 202 73-80 Sakai S., Ono T., Ijima H., Kawakami K. Permeability of alginate/sol-gel s)mthesized aminopropyl-silicate/alginate membrane templated by calcium-alginate gel. J. Membr. Sci. 2002 205 183-189... [Pg.1365]

Dropping or spraying a sodium alginate solution into a calcium chloride solution produces microcapsules. The divalent calcium ions cross-link the alginate, forming gelled droplets. These gel droplets can be permanently cross-linked by addition to a polylysine solution. Lim and Sun developed this method for the encapsulation... [Pg.2331]

Stable polyelectrolyte microcapsules were produced by means of the layer-by-layer adsorption of protamine and alginic acid on the surface of calcium carbonate microcores followed by the cores dissolution at low pH. The capsules obtained were investigated by atomic force microscopy and confocal laser scanning microscopy. [Pg.519]

The gelation technology employs chemical interactions to cause liquid droplets to gel, forming microcapsules or microspheres. This technique is used by the pharmaceutical industry to encapsulate active agents and also to immobilize live cells and organisms. In one process, live cells are first entrapped in gel matrix beads produced by the reaction of sodium alginate with calcium ions. The outer layer of the beads is then hardened by treatment with a polycation to form a polyelectrolyte complex, while the interior of the beads is solubilized by treating with sodium nitrate to form a soluble complex. [Pg.678]

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See also in sourсe #XX -- [ Pg.2331 ]



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Microcapsules

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