In this work, a coating of chitosan onto alginate hydrogels was realized using the water-soluble hydrochloride form of chitosan (CH-Cl), with the dual purpose of imparting antibacterial activity and delaying the release of hydrophilic molecules from the alginate matrix. Alginate hydrogels with different calcium contents were prepared by the internal setting method and coated by immersion in a C...

Diclofenac sodium is an Non-steroidal anti-inflammatory drugs, having an elimination half-life of 1-2 hrs. The objective of the study is to prepare Diclofenac sodium Microbeaads using Natural Polymers in different concentrations. For this purpose calcium ions were used as cross linking agents in formulation of alginate-guar gumpectin, alginate-guar gum-lecithin and alginate-pectin-lecithin Micr...

Ammonia-oxidizing bacteria were immobilized by polyvinyl alcohol (PVA) and sodium alginate. The immobilization conditions and ammonia oxidation ability of the immobilized bacteria were investigated. The following immobilization conditions were observed to be optimal: PVA, 12%; sodium alginate, 1.1%; calcium chloride, 1.0%; inoculum concentration, 1.3 immobilized balls/mL of immobilized medium; ...

A method is described for the wet spinning of alginate fibers with a loading of single-walled carbon nanotubes as high as 23 wt%. Electrostatic assembling of polyelectrolytes and nanotubes coated with sodium dodecyl sulfate is exploited by using calcium as a cross-linking agent. The Young’s modulus of these fibers depends non-monotonically on nanotube concentration which is explained using Halp...

This paper describes a microfluidic device for the microencapsulation of cells in alginate beads to enhance cell viability. The alginate droplet including cells was gelified with calcified oleic acid, using two-phase microfluidics. The on-chip gelation had generated monodisperse spherical alginate beads, which could not be readily obtained via conventional external gelation in a calcium chlorid...

An adhesive that functions well under moist conditions could facilitate many surgical procedures. In recent studies we designed novel biomimetic glues which mimic the adhesion mechanism of algae, renowned for their remarkable adherence to wet surfaces. Here we extend our previous studies and propose biomimetic formulations, composed of alginate gel and native phloroglucinol, that do not induce ...

because of poor survival of probiotic bacteria, microencapsulation evolved from the immobilized cell culture technology used in the biotechnological industry. two probiotic strains, bifidobacterium (bb-12) and lactobacillus acidophilus (la-5) were immobilized in calcium alginate by extrusion method. encapsulation parameters and efficacy of this method were evaluated. growth factors of these two...

The presented study aimed to design and characterize bilayer Alginate/Fibroin scaffolds provide faster higher quality treatment of skin tissue losses with engineering approach. In this context, it was tried form the dermis epidermis layers alginate salts (sodium calcium) fibroin a biomimetic approach, determine most suitable salt-fibroin composite scaffold by trying different production methods...

A Bacillus sp. which is capable of degrading dimethylphthalate (DMP) was immobilized in calcium alginate and polyurethane foam for efficient and long term degradation of DMP. Freely suspended cells (10(12) cfu ml-1) degraded a maximum of 20 mM DMP. Whereas, alginate-(10(12)cfu g-1 beads) and polyurethane foam-entrapped (0.34 x 10(6-9) cfu g-1 foam cubes) cells degraded a maximum of 40 mM DMP wi...

Nanosized gel particles (nanogels) are of interest for a variety of applications, including drug delivery and single-molecule encapsulation. Here, we employ the cores of nanoscale liposomes as reaction vessels to template the assembly of calcium alginate nanogels. For our experiments, a liposome formulation with a high bilayer melting temperature (Tm) is selected, and sodium alginate is encapsu...