relationship between fiber porosity and cellulose digestibility in steam-exploded pinus radiata

steam explosion after sulfur dioxide impregnation of wood chips is an effective method for improving the enzymatic digestibility of cellulose in the softwood pinus radiata. digestibility of pretreated fiber was progressively increased by altering the conditions of steam explosion. with increasing digestibility, there was an observed incre..

evaluation of sealers and mortars for protection of concrete silos

organic resin coatings such as epoxy, polystyrene and polyurethane have been used to protect concrete farm silos against chemical attack by silage juices, chiefly lactic and acetic acids this paper describes tests to evaluate some of these organic resin coatings. the paper further describes the development and test results of an improved,..

isfet based enyzme sensors

this paper reviews the results that have been reported on isfet based enzyme sensors. the most important improvement that results from the application of isfets instead of glass membrane electrodes is in the method of fabrication. problems with regard to the ph dependence of the response and the dynamic range as well as the influence of t..

preparation of stoichiometric mercury cadmium telluride surfaces

a technique involving cathodization of an anodized surface has been proposed as a surface treatment of mercury cadmium telluride substrates in the fabrication of infrared-sensitive devices. the resultant surface was analyzed with x-ray photoelectron spectroscopy and compared with surfaces produced by cleavage, sputtering, and chemical etc..

normal wound healing compared to healing within porous dacron implants

this study examined the hypothesis that healing within porous implants differs from that in normal connective tissue. special attention was given to extracellular components including collagen, reticular fibers, and ground substance, and to enzymes associated with activated macrophages. using dacron velour and the rabbit as host, the heal..

device for the direct foam-in-cover production of textile-fabric covered molded parts, especially seat cushions and seat back rests

in the production of seat cushions and back rests, upholstering with the cover material in a separate step is very labor intensive; thus, for several years a better production method has been desired because of the high work content, a new molding apparatus has been developed, making possible a reliable production process, as well as a lo..

comparison of apparatus used to measure water vapour resistance

various methods of determining the permeability of textile fabrics to the passage of water vapor have been developed and described. several uncoated fabrics were tested, as well as fabrics with a polytetrafluoroethylene film, fabrics with microporous polyurethane films, and fabrics with hydrophilic coatings. the accuracy of the apparatus ..

single fiber-optic fluorescence enzyme-based sensor

penicillinase is immobilized on a single fiber-optic ph sensor by cross-linking in a thin glutaraldehyde membrane on a porous glass bead, to which a fluorescent ph dye has been bound. pencillin in solution is enzymatically converted to penicilloic acid at the probe surface, causing a decrease in ph with a concomitant decrease in the fluor..

optical ph sensor based on the chemical modification of a porous polymer film

a new approach to the design and construction of an optical ph sensor has been developed by immobilizing a direct azo dye at a porous cellulosic polymer film. the sensor was fabricated by binding congo red to a cellulose acetate film that had previously been subjected to an exhaustive base hydrolysis. advantageous features of the design i..

papers presented at the 113th iron and steel institute of japan meeting

this conference proceedings in this issue contains 22 papers the papers are arranged in the following groups: ironmaking; steelmaking; shaping and fabrication: instrumentation and control; chemical analysis; surface treatment; products and properties; and new materials and new processing. all papers are abstracted separately. technical an..