Curdlan production by Agrobacterium sp. IFO13140 immobilized on loofa sponge, alginate and loofa sponge with alginate was investigated. There was no statistically-significant difference in curdlan production when the microorganism was immobilized in different matrices. The loofa sponge was chosen because of its practical application and economy and because it provides a high stability through i...

This novel, competitive immunoassay simultaneously detects seven drugs of abuse in urine. A urine sample is placed in contact with lyophilized reagents, the reaction mixture is allowed to come to equilibrium (10 min), and then the whole mixture is applied to a solid phase that contains various immobilized antibodies in discrete drug-class-specific zones. After a washing step, the operator visua...

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A detailed investigation of bioengineering constants for the accumulation of major yeast metabolites in beer produced by free and immobilized cells was carried out. The kinetic constants were used to determine the effect of immobilization on yeast metabolism. The esters synthesis dynamics was similar for the free and the immobilized cell which was confirmed by the kinetic model. The dynamics of...

we introduce a new smooth, non-toxic, biocompatible method for cross-linking of gum tragacanth (gt), a polysaccharide of natural origin, in order to serve as a new supporting matrix for immobilization systems.  the modified gum is used as a matrix for the catalysis of the conversion of benzyl penicillin to 6-aminopenicillanic acid (6-apa) by means of escherichia coli atcc11105 with penicillin g...

background: collagen, the most abundant protein in the human body, and as an extracellular matrix protein, has an important role in the fiber formation. this feature of the collagen renders  establishment of the structural skeleton in tissues. regarding specific features associated with the collagen, such as, formation of the porous structure, permeability and hydrophilicity, it can also be use...

the development of reliable processes for the synthesis of nanoparticles is an important aspect of nanotechnology. biologically synthesized nanoparticles could have innumerable applications in different areas such as reception, catalyzers, biolabellers, etc. in the present review, we emphasize the richness of the microbial world which encompasses a plethora of endophytic entities as an emerging...

In this work, a three-dimensional bioelectrochemical reactor system (3D-BERs) with granular activated carbon (GAC) was utilized to study the feasibility of simultaneous removal nitrates by autotrophic-heterotrophic denitrification process under different pH levels. present study, it found that when influent COD/ NO3--N ratio ranged between 1.5 and 3.5, both autotrophic heterotrophic denitrifyin...

Environmentally friendly natural materials, chitosan (CS) and tannic acid (TA), were used to prepare a composite membrane immobilize Stenotrophomonas maltophilia on it, which was then applied for removing manganese in water. Surface morphology investigated, the amount of immobilized fungus probed using scanning electron microscopy (SEM). A prepared by grafting CS TA cotton cloth, experimental c...