hydrolysis of butteroil by immobilized lipase using a hollow-fiber reactor. part ii. uniresponse kinetic studies

a lipase from aspergillus niger immobilized by adsorption on microporous, polypropylene hollow fibers was used to effect the hydrolysis of the glycerides of melted butterfat at 40 $degree$ c and ph 7.0. mcilvane buffer was pumped through the lumen and melted butterfat was pumped concurrently through the shell side of a shell-and-tube reac..

anodic oxidation of carbon fibres in diammonium hydrogen phosphate solution

anodic surface treatment of high tensile-carbon fibers under galvanostatic conditions has been performed in diammonium hydrogen phosphate solution, containing an addition of ammonium rhodanide. the oxidized fibers have been characterized by monofilament tensile strength, xps measurements and surface energetic analysis. in addition, the ac..

study of blood compatible polymers i. modification of poly(vinyl alcohol)

poly(vinyl alcohol) (pva) has been modified by the graft copolymerization of methyl methacrylate and acrylamide. these polymers have been characterized by ftir, esca, and sem. angle dependent esca studies have been carried out to determine the surface homogeniety. the in vitro blood coagulation tests have shown that the modified polymers ..

effects of previous leaching with hydrochloric acid of e-glass short fibre on the fibre reaction with chlorosilanes

leaching of e-glass fibres with hcl and its effect on the reaction of fibre with chlorosilanes were studied by ftir spectroscopy and thermal analysis. leaching removes basic oxides from the fibre, increases fibre surface area and causes intense surface hydration as well as water diffusion into the fibre. fibre hydration can be reduced by ..

theoretical analysis of convective flow profiles in a hollow-fiber membrane bioreactor

although a number of recent experimental and theoretical investigations have demonstrated that radial convection can have dramatic effects on the overall performance of hollow-fiber membrane bioreactors, available theoretical analyses are unable to accurately describe the detailed convective recirculation (or starling) flow which occurs i..

third international conference on indium phosphide and related materials

the following topics are dealt with: bulk growth and wafer technology; solar cells; epitaxy; optoelectronics; multiple quantum well lasers; hbts and migfets; dry etching techniques; device fabrication techniques; electron devices and bulk crystal growth; hemts; optoelectronic integrated circuits; fets; epitaxial processing; multiple quant..

peculiarity of oiling and brightening treatment of polyester fiber and filaments

the aim of oiling of the polyester fibers and filaments is to create on the surface of protective layer of lubricant, which lowering of the friction interaction, because of decreasing of the actual square of the contact between the friction surfaces. oiling and brightening treatment of polyester fibers and filaments 2340t of textile auxil..

reinforcement of recycled polyolefins with wood fibers

in this work recycled polyolefins from municipal solid wastes, composed of 95 polyethylene (pe) and 5 polypropylene (pp), are reinforced with chemicothermomechanical pulp fiber, and the resulting material is formed by compression and injection molding. tensile properties are presented as function of fiber concentration, fiber surface trea..

fluorescence-based fiber optic biosensor for the flow-injection analysis of penicillin

a penicillin fiber optic sensor is described. the sensor is based on co-immobilization of a ph indicator, fluorescein isothiocyanate (fitc), and penicillinase on a preactivated biodyne b membrane attached to the end of a bifurcated optical fiber. the characteristics of the sensor are investigated in conjunction with a flow injection analy..

hydrolysis of butteroil by immobilized lipase using a hollow-fiber reactor. iv. effects of temperature

a lipase from aspergillus niger, immobilized by adsorption on microporous polypropylene hollow fibers, was used to effect the hydrolysis of the glycerides of melted butterfat at ph 7.0 at 40, 50, 55, and 60 $degree$ c. mcllvane buffer was pumped upward through the lumen, and melted butterfat was pumped upward through the shell side of a h..