in this study, the substrate diffusion in an immobilized spherical cell-support aggregate is studied and effects of various parameters are investigated on substrates profile. analyses are performed by using of an analytical solution called the least square method (lsm) and results are compared with numerical solution. the effects of effective diffusion coefficient ( d e ), maximum specific grow...

The immobilization of microorganisms on ultrafiltration membranes made from polyacrylonitrile modified chemically with hydrazine hydrate and glutaraldehyde and their application to the biodegradation of phenol and cyanide contained in industrial wastewaters was examined. Three types of microorganism isolated from a mixed population of activated sludge adapted to phenol and cyanide decomposition...

A combination of microalgae (Chlorella vulgaris or C. sorokiniana) and a microalgae growth-promoting bacterium (MGPB, Azospirillum brasilense strain Cd), co-immobilized in small alginate beads, was developed to remove nutrients (P and N) from municipal wastewater. This paper describes the most recent technical details necessary for successful co-immobilization of the two microorganisms, and the...

background and objectives : the attempts were made to describe the development of a whole cell immobilization of p. pastoris by entrapping the cells in polyacrylamide gel beads. the alcohol oxidase activity of the whole cell pichia pastoris was evaluated in comparison with yeast biomass production. materials and methods : methylotrophic yeast p. pastoris was obtained from collection of standard...

Pyrethroid pesticide cypermethrin is a environmental pollutant because of its widespread use, toxicity and persistence. Biodegradation of such chemicals by microorganisms may provide an cost-effective method for their detoxification. We have investigated the degradation of cypermethrin by immobilized cells of Micrococcus sp. strain CPN 1 in various matrices such as, polyurethane foam (PUF), pol...

The adherence of microorganisms to platelets previously immobilized on the subendocardium in nonbacterial thrombotic endocarditis is considered an important pathogenic step in Staphylococcus aureus endocarditis. To identify and characterize bacterial factors involved in the adherence to platelets, a phage display library of S. aureus was generated by use of the phagemid pG8H6. The library was a...