Bilayerd films were prepared by solvent casting technique using different concentration of two polymers namely, sodium alginate and pectin. The backing membrane was prepared by using sodium alginate. The drug containing layer was prepared by using pectin. Different concentrations of plasticizers and permeation enhancers were added. Prepared films were evaluated for surface properties, weight va...

Biodegradable nanocomposite films were prepared by incorporation of cellulose nanofibrils (CNF) into alginate biopolymer using the solution casting method. The effects of CNF content (2.5, 5, 7.5, 10 and 15 wt %) on mechanical, biodegradability and swelling behavior of the nanocomposite films were determined. The results showed that the tensile modulus value of the nanocomposite films increased...

genotypes of iranian zel sheep for calpastatin(cast) locus were determined by polymerase chain reaction-restriction fragment length polymorphism (pcr-rflp) and polymerase chain reaction-single strand conformation polymorphism (pcr-sscp) methods and for calpain(capn) locus by pcr-sscp. blood samples were collected from 200 purebred zel sheep of zel breeding station located in golestan province i...

in this research, the microstructural of low molecular weight 1,2-polybutadiene (1,2-pbd) was conducted by 1h and 13c nuclear magnetic resonance spectroscopy (nmr) to determine the isomeric contents of 1,4-cis, 1,4-trans and 1,2-vinyl in 1,2-pbd polymer structures. number average molecular weight for low molecular weight 1,2-pbd was measured by nmr techniques and the results were compared with ...

Free-standing films have increasing applications in the biomedical field as drug delivery systems for wound healing and tissue engineering. Here, we prepared free-standing membranes by the layer-by-layer assembly of chitosan and alginate, two widely used biomaterials. Our aim was to produce a thick membrane and to study the permeation of model drugs and the adhesion of muscle cells. We first de...

BACKGROUND Absorption of antigens onto chitosan microparticles via electrostatic interaction is a common and relatively mild process suitable for mucosal vaccine. In order to increase the stability of antigens and prevent an immediate desorption of antigens from chitosan carriers in gastrointestinal tract, coating onto BSA loaded chitosan microparticles with sodium alginate was performed by lay...

Sodium alginates were extracted from brown seaweeds (Cystoseira schiffneri) collected a Tunisian island (Kerkennah, Sfax) in different seasons (December, April, July and September). The structural features antioxidant properties of C. schiffneri sodium (CSSA) characterized. Micro-elementary analysis showed the absence nitrogen sulfur alginate fractions. All isolates high uronic acids (47.4–66.4...

Decreasing low molecular weight can improve the digestibility and availability of ingredients such as sodium alginate. This study aimed to test four dosages alginate (LMWSA) (0%: Control, 0.05%: 0.5 LMWSA, 0.10%: 1.0 0.2%: 2.0 LMWSA) in whiteleg shrimp (Litopenaeus vannamei) (3.88 ± 0.25 g) for eight weeks. After finishing trial, were exposed cadmium (1 mg/L) 48 h. While feed conversion ratio (...

Alginate lyases show great potential for industrial and medicinal applications, especially as an attractive biocatalyst for the production of oligosaccharides with special bioactivities. A novel alginate lyase, AlyH1, from the marine bacterium Vibrio furnissii H1, which has been newly isolated from rotten seaweed, was purified and characterized. The purified enzyme showed the specific activity ...