environmental outlook 1978/79

projections of pollutants produced and released to air and to bodies of water, by federal region, from 1975 to 1990 are presented and discussed. these are projections of the strategic environmental assessment system (seas), which is a computer model consisting of a detailed sector by sector economic model, and a set of emission coefficien..

homogeneous solution reactions of cellulose, chitin, and other polysaccharides to produce controlled-activity pesticide systems,

during the past few years a growing interest has developed in controlled-activity or controlled-release polymeric pesticide systems. advantages of these systems include increased efficiency of pesticide delivery requiring fewer applications, more effective control of the target organism, and reduced adverse impact on nontarget organisms i..

cam-4, a portable warning device for organophosphate hazardous material spills

cam-4 is a completely portable, battery-operated, field version of the earlier cholinesterase antagonist monitor, cam-1, which senses organophosphates and carbamates in water supplies. the present report describes the design, fabrication, and evaluation of the cam-4 device. like cam-1, this device uses immobilized cholinesterase in an ele..

studies on modification of cellulose via dissolution into n-ethylpyridinium chloride

there is a demand in the textile industry to replace the viscose process for producing rayon fibers by a more environmentally favorable process. recently there has been an increasing interest in nonaqueous solvents for cellulose by investigators concerned with either the polymer properties or possible routes of modification of cellulose. ..

feasibility studies on enzyme systems for detector kits

studies have been conducted to improve the enzyme ticket developed for use in the water test kit for chemical agents in water. a new eel cholinesterase ticket has been developed which uses an anion exchange paper as the support for the enzyme. glass fiber filter papers have been investigated as possible supports for enzyme or substrate fo..

physical aspects of polymer surface treatment aspects physiques du traitement des surfaces polymeriques

the transformation of polymer surfaces by electric discharges is examined. industrial processes, laboratory techniques, and measuring procedures are reviewed. an experimental device for polymer treatment in a uniform electric field and two measuring systems for electrical characterization are described. the rates of chemical change on the..

surface preparation of pavements prior to application of pavement markings

this project was undertaken to demonstrate that surface preparation of pavements by wire brushing prior to application of traffic marking paint would result in extended service life of traffic marking paint a brush assembly was designed, fabricated and installed on a texas department of highways and public transportation striping truck an..

coupled enzyme-hollow fiber systems

this report briefly describes research on devising a stabilized enzyme system of increased capacity and rate of conversion in order to be applicable to industrial processes, employing enzymes coupled by chemical bonds to the inner pore surfaces of membranes under pressure-driven conditions, and passing the feed stream into the reactor und..

novel approaches for alleviation of electrical hazards of graphite-fiber composites. / aircraft safety

four basically different approaches were considered: gasification of fibers, retention in the matrix, clumping to prevent entrainment, and electrical insulation of fibers. the techniques used to achieve them are described in some detail. these involved surface treatment of fibers to improve the wettability of fibers and coating the fibers..

enzyme catalyzed synthetic reactions,

use of an enzyme attached to a cellulosic carrier in organic synthesis is described. cellulose matrix-supported enzymes constitute useful biological catalysts with broad potential applications in the food, chemical, and pharmaceutical industries. in the current investigation, horseradish peroxidases quantitatively converted 2,4, 6-trimeth..