electrochemical treatments in an organic medium of carbon fibres with laminated substrate. effects of these treatments on the mechanical properties of carbon-epoxy composites

work directed towards improving the toughness of carbon epoxy composites by carrying out laminated treatments is presented. the great variety of laminated molecules capable of being grafted onto the surface of the fiber is exploited. the combination of high tensile strength xau courtaulds fibers and narmco 5208 resin was used and enabled ..

murine susceptibility to organophosphorus-induced delayed neuropathy (opidn). journal article.reprint: murine susceptibility to organophosphorus-induced delayed neuropathy (opidn)

the study reports that cd-1 strain mice are neuropathologically and biochemically responsive to acute doses of tri-ortho-cresyl phosphate (tocp). young (25-30 g) male and female animals were exposed (po) to a single dose of tocp (580-3480 mg/kg) and sampled for neurotoxic esterase (nte) activity at 24 and 44 hr postexposure and for neurop..

effects of training with reduced perfusion pressure on performance and muscle fiber characteristics

endurance training increases performance time (pt) during incremental exercise and may increase the type 1 fiber percentage, capillary supply and oxidative enzyme content in skeletal muscle several factors alone or in combination may trigger these responses, e.g., hypoxia, ischemia, substrate deficiency or flux through aerobic metabolism...

dietary enzyme supplementation as a method of improving the nutritional value of cereal grains: technical/final report

barley and oats are not considered good feed for poultry because the relatively high level of crude fibre is not digested by the chicken and the carbohydrate constitutents, which are very viscous in water, cause a reduction in the digestion and absorption of nutrients research has demonstrated that dietary enzymes can break down the delet..

mechanical properties of the fiberglass prepreg system used for the national transonic facility replacement blade set. technical report 1989 - 1990

the results are presented of mechanical and physical properties characterization testing for the fiber glass prepreg system used to fabricate 15 of the replacement set of 25 fan blades for the national transonic facility. the fan blades were fabricated to be identical to the original blade set with the exception that the 7576 style e glas..

calcium phosphate glass-ceramics for biomedical and biotechnological applications

three new glass-ceramics have been prepared based on calcium phosphates. each of them is classified into three typical categories of glass-ceramics, i.e., (1) volumely crystallized dense glass-ceramics with a composition of 45 cao.25 tio2.30p2o5(mol ) or 52 cao.al2o3.47p2o5(+5zro2 && 0.5y203), (2) uni-directionally crystallized glass-cera..

reports of the research laboratory, asahi glass co., ltd., vol. 40, no. 1, 1990

contents: impact simulation of architectural glass by means of finite element method; a molecular dynamics study on a fluoride glass; wet etching mechanisms of ito thin films; numerical simulation of atrium air flow and temperature distributions; on the characteristics of some fusion cast refractories for high temperature glass melting; d..

enzymatic detoxification of chemical warfare agents: immobilization of the enzyme for material surfaces. final rept

the objective of this research is to investigate feasibility of immobilizing squid-type dfpase on fabrics such as nylon, polyester, cotton and polyester-cotton blends and on polyethylene glycol. large quantities (about 15,000 units) on of the enzyme was prepared from the hepatopancreas tissues of east coast (echp) and west coast (wchp) sq..

design and fabrication of instrumented composite airfoils for a cryogenic wind tunnel model

two instrumented horizontal stabilizers and one instrumented vertical stabilizer were designed and fabricated for testing on the pathfinder 1 (pf-1) transport model in the nasa langley research center's national transonic facility (ntf). two different designs were employed: the horizontal stabilizer utilized a metal spar and fiberglass ov..

effect of whisker surface treatments and processing conditions on the sic/al2o3 interface

various electron microscopy techniques have been used to evaluate the microstructural and interfacial characteristics of silicon carbide whisker-reinforced alumina composites. the effects of subjecting whiskers to oxidizing and reducing treatments prior to composite fabrication were examined. whisker/matrix interfaces in which carbon coat..