improved chemicals for fiberglass-reinforced plastic soil surfacings - field evaluation

a new chemical formulation was recently developed for constructing fiberglass-reinforced plastic surfacings for soils; it consists of a polyester resin, cumene hydroperoxide catalysts, and vanadium ten-cem/n,n-dimethyl-p-toluidine solution promoter. this report documents the field testing of this new formulation with present marine corps ..

high efficiency thin-film gaas solar cells. first interim report, march 1--august 30, 1977

the objective is to demonstrate the feasibility of producing high-efficiency (15 or greater) thin-film gaas solar cells with costs suitable for terrestrial solar electric power generation. the approach is that of growing gaas by organio-metallic chemical vapor deposition on recrystallized germanium (ge) films previously deposited on metal..

fabrication of fiberglass reinforced plastic surfacing under wet conditions

the purpose of this investigation was to develop a system to be used in the construction of fiberglass-reinforced plastic surfacings for soil under wet conditions. the effect of water in the substrate and in the fiberglass mat, on laminate properties, has been defined and solutions have been developed for some of the problems. a system of..

urethane coatings. june, 1970-june, 1980 (citations from the engineering index data base)

worldwide citations cover information on formulations and applications of urethane coatings, such as fabrics, automobile parts, plastics, concrete, transportation industry, rubber and polyvinyl chloride substrates. solventless formulations, shrinkage prevention and energy savings of urethane coatings are also included. (contains 069 citat..

bioassay of 2, 6-toluenediamine dihydrochloride for possible carcinogenicity

2,6-toluenediamine is used as an intermediate in the production of dyes for furs and textiles, and of flexible polyurethane foams and elastomers. a bioassay of 2,6-toluenediamine dihydrochloride for possible carcinogenicity was conducted by feeding diets containing the test chemical to f344 rats and b6c3f1 mice. groups of 50 rats of each ..

the development of two protective apparel systems for firefighting executive summary

in approaching the design of new protective apparel systems for firefighting, consideration was given to bulk, weight, fit, comfort, and protection such clothing should give the firefighter to help relieve physical and psychological pressures involved with fighting fires. two garment systems made of similar protective fabrics were develop..

(investigation of low-cost solar cells based on cu sub 2 o). third quarterly progress report, november 1, 1979-january 31, 1980

efforts this quarter concentrated on completion and check-out of the mbe system, deposition of zns films, analysis of the internal photoresponse for cu-cu sub 2 o cells, and fabrication and characterization of cu-cu sub 2 o solar cells. in-doped zns films with very good optical quality and finite conductivity were obtained by co-depositin..

fabrication for precision mechanisms. final report

the fabrication of components and assemblies for miniature precision mechanisms provides a variety of exacting manufacturing challenges size alone makes many parts hard to pick up, handle, measure, and install. this same small size causes more distortion or bending during machining, assembly, and welding. some parts even float on the clea..

increasing the value of straw by fermentation,

actual and potential uses for straw, currently a major source of waste cellulose, are reviewed. the study covers five principal aspects: (1) problems associated with straw use; (2) direct uses for straw; (3) mechanical conversion; (4) mechanical, chemical, and biological treatments; and (5) chemicals from straw. investigation reveals that..

enzymatic studies of mitochondria and other constituents of lobster and squid nerve fibers

no abstract available