نتایج جستجو برای: alginate matrix
تعداد نتایج: 372443 فیلتر نتایج به سال:
Bacterial anchoring to limestone rocks is thought occur by selective adsorption of biomolecules found in the extracellular matrix, such as polysaccharides. Here we study adsorbed structure a model matrix polysaccharide, sodium alginate, at calcite/water interface using neutron reflection (NR). Sodium alginate was form highly hydrated layers extending up 350 Å into solution concentrations 2.5 pp...
background sulfur oxides released from the burning of oil causes severe environmental pollution. the sulfur can be removed via the 4s pathway in biodesulfurization (bds). immobilization approaches have been developed to prevent cell contamination of oil during the bds process. objectives the encapsulation of rhodococcus erythropolis r1 in calcium alginate beads was studied in order to enhance c...
Alginate denotes a group of industrially important 1-4-linked biopolymers composed of the C-5-epimers β-D-mannuronic acid (M) and α-L-guluronic acid (G). The polysaccharide is manufactured from brown algae where it constitutes the main structural cell wall polymer. The physical properties of a given alginate molecule, e.g., gel-strength, water-binding capacity, viscosity and biocompatibility, a...
On the basis of decolorization caused by reaction active oxygen species (AOSs) with methylene blue (MB), our group recently developed colorimetric indicators for hydroxyl radical (OH radical) embedding MB in polymer thin films made water-soluble pullulan or sodium alginate. In present work, to elucidate reason selective induced OH compared other AOSs, such as ozone (O3) and hydrogen peroxide (H...
INTRODUCTION Low back pain is a major economical and social problem nowadays. Intervertebral disc herniation and central degeneration of disc are two major reasons of low back pain that occur because of structural impairment of disc. The intervertebral disc contains three parts as follows : Annulus fibrosus, transitional region, and nucleus pulposus, which forms the central nucleus of the disc....
The O-acetylation of polysaccharides is a common modification used by pathogenic organisms to protect against external forces. Pseudomonas aeruginosa secretes the anionic, O-acetylated exopolysaccharide alginate during chronic infection in the lungs of cystic fibrosis patients to form the major constituent of a protective biofilm matrix. Four proteins have been implicated in the O-acetylation o...
An analysis of the Pseudomonas aeruginosa genomic sequence revealed three gene clusters, PA1381-1393, PA2231-2240, and PA3552-3558, in addition to the alginate biosynthesis gene cluster, which appeared to encode functions for exopolysaccharide (EPS) biosynthesis. Recent evidence indicates that alginate is not a significant component of the extracellular matrix in biofilms of the sequenced P. ae...
encapsulation of protocorm of cymbidium bicolor lindl. for short-term storage and germplasm exchange
the present study describes the encapsulation of protocorm of cymbidium bicolor lindl. from 60 days-old in seed cultures for short- term conservation and propagation. various concentrations and combinations of gelling matrix (sodium alginate) and complexing agents (calcium chloride) were tested to prepare uniform beads. the ideal beads were ob- tained through a combination of 3% sodium alginate...
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