properties of invertase immobilized on the poly(ethylene-co-vinyl alcohol) hollow fiber membrane

invertase was ionically immobilized on the poly(ethylene-co-vinyl alcohol) hollow fiber inside surface, which was aminoacetalized with 2-dimethylaminoacetaldehyde dimethyl acetal immobilization and enzyme reaction were carried out by letting the respective solutions pass or circulate through the inside of the hollow fiber, and the activit..

einstell - und verfahrensparameter exakt reproduzierbar $left bracket$ coating and doubling unit: precisely reproducible setting and process parameters $right bracket$

hermann berstorff maschinenbau gmbh of hanover recently presented a combined coating and doubling unit which is designed for a face width of 4500 mm and for a production width of up to 4000 mm the unit is intended for the production of conveyor belts and drive components, made up of one or more layers of fabric with intermediate and cover..

chemical modification: adding value through new f>pl composite processing technology

chemical modification can greatly improve the biological resistance and dimensional stability of wood products. application of this technology to wood composites eliminates problems associated with solid wood, such as drying, chemical penetration, and chemical recovery. aspen flakeboards made from flakes to about 17-percent acetyl weight ..

coextrusion process for the manufacture of short-fiber-reinforced thermoplastic pipe

the advantageous use of short-fiber-reinforced thermoplastic (sfrtp) resins in the manufacture of pipe requires that the fiber orientation be controlled and that the surface finish not be adversely affected by the presence of the fibers. it is proposed here that a coextrusion process be combined with the use of a specially designed, expan..

effect of surface preparation on the performance of acrylic adhesive joints

the effects of four surface treatments on the bonding performance of five second generation acrylic adhesives were studied adhesive performance was characterized using lap shear and wedge specimens exposed to elevated temperatures and humidity. for all adhesives studied, results indicated that chromic acid anodized aluminium gave superior..

preparation and characteristics of polyurethane and halogenated polymer blends for multi-functional wetting coagulating coating

blends of a polyurethane elastomer and polyvinyl chloride or polyvinylidene fluoride were obtained through precipitation from dmf solvent. studies on the compatibility of the blends were carried out using dsc, rheovibron, infrared spectroscopy, sem and tem. the tensile properties and the thermal stability of these blends were investigated..

new strong cement materials: chemically bonded ceramics

new cements developed in recent years have strengths that are greater by an order of magnitude than those of conventional hydraulic cements. these low-temperature materials, whose strengths approach those of many traditional high-temperature ceramics, are termed chemically bonded ceramics. the different routes to generating strong cementi..

immobilization of bacillus subtilis macrofibers by entanglement

the growth dynamics and structure of bacillus subtilis macrofibers have been exploited to develop a new strategy for the immobilization of bacterial cells. the helical turning and folding motions associated with macrofiber growth enabled macrofibers to become entwined about a support material of appropriate dimensions and surface texture...

colour quality assurance with instrumental colour control

the assessment of color conformity between a production dyeing and a reference sample, as well as the assessment of any color deviations between various deliveries is addressed. this article describes the prerequisites for achieving an effective color quality control. the application of instrumental color control is intended to complement..

new technology for stoneless stone-washing applications

the advantages of the stone-wash process, softness and a pleasing highlighted effect can be chemically reproduced without the disadvantages of using stones. microscopic analysis shows less mechanical damage to fibers at the fabric surface. softness panel testing illustrates that people cannot tell the difference between the fabrics that h..