enhancement of cellulase production by immobilization of trichoderma reesei cells

cellulase from trichoderma reesei is regarded as the most suitable for the hydrolysis of cellulosic wastes. in previous works, the authors studied the immobilization of t. reesei by radiation polymerization in which the enzyme productivity in the immobilized cells was comparable to that in the free cells. in this paper, the immobilization..

chemical and property modification of silk with dibasic acid anhydrides

in an attempt to provide information for improving silk fiber and fabric properties including crease recovery and yellowing, silk modification has been studied by using succinic and glutaric anhydrides. glutarylation has been found to protect silk fibers from yellowing caused by the high energy radiation and to be more effective on increa..

edm machinability of sicw/al composites

target materials, 15 and 25 vol sic whisker-2124 aluminium composites, were machined by electrodischarge sinker machining (edm) and a diamond saw. the machined surfaces were examined by scanning electron microscopy (sem) and profilometry to determine the surface finish. microhardness measurements were also performed on the as-machined com..

membranes and bioreactors: a technical challenge in biotechnology

integrating the properties of synthetic membranes with biological catalysts such as cells and enzymes forms the basis of an exciting new technology called membrane bioreactors. the impetus behind this marriage comes from the recent spectacular advances in recombinant dna and cell fusion technologies and the need to develop competitive bio..

immobilized enzyme membrane fabrication method using an ink jet nozzle

a novel enzyme immobilization method, which realized the efficient use of enzymes for biosensors, was developed. an ink jet nozzle, originally developed for printing equipment, was used as a tool for precise enzyme deposition onto an isfet device. two sorts of immobilization methods were attempted: one is liquid phase immobilization, in w..

fibre-optic glucose sensor with a ph optrode as the transducer

an enzyme optrode capable of continuously monitoring glucose concentrations is presented. glucose oxidase was physically immobilized in a sensing layer at the end of a fiber optic light guide. the enzyme catalyses the oxidation of glucose to give gluconic acid, which, in turn, lowers the ph in the microenvironment of the sensor. the enzym..

polymeric diaphragm forming of complex-curvature thermoplastic composite parts

an experimental autoclave is employed for polymeric diaphragm forming of carbon-fiber reinforced polyetheretherketone (peek) innovative tool design, resulting in cheap and light mould construction, gives cycle times of 60 min. male and female hemispherical section parts, as well as a box-shaped model trailer, are formed by applying differ..

biochemical methods of freeing gas-air mixtures from sulfur containing compounds

biochemical methods of cleaning up ventilation discharges are based on the ability of microorganisms to destroy or transform the harmful substances contained in the discharges and can be carried out in biofilters or bioscrubbers. this paper reviews domestic and foreign (primarily west german, japanese, and finnish) biochemical methods of ..

preparation of small diameter holes in printed circuit boards for electroless copper plating using a jet pumice machine

due to problems experienced at the deburring stage of drilled 0 $center dot$ 013 in. diameter holes, where the holes became blocked with deburring brush fibers, it was necessary to replace the use of traditional deburring techniques for the preparation of these drilled holes prior to electroless copper plating. in order to achieve this, a..

effect of modification of the surface of carbon fibers on the reaction with epoxy matrices

adhesive interactions of epoxy-4,4-isopropylidenediphenol (edt-10) and epoxy-novolac binders (endb) with the surface of domestic carbon fibers based on polyacrylonitrile were studied fibers with an untreated surface and with a surface activated by the electrochemical method of anode oxidation were studied. fibers whose surfaces were treat..