diamond turning of silicon for optics applications

the goal of this study is to examine the feasibility of fabricating silicon optical surfaces by diamond turning. our approach has been to machine small slices of single crystal silicon using a range of process parameters similar to what has typically been employed with ductile materials. in this manner, a set of conditions has been bracke..

development of composite polymer-glass edge claddings for nova laser disks

large nd:glass laser disks for disk amplifiers require an edge cladding which absorbs at 1 mu m. this cladding prevents edge reflections from causing parasitic oscillations that would otherwise deplete the gain. we have developed a composite polymer-glass edge cladding that consists of absorbing glass strips bonded to the edges of laser g..

reports of the government industrial research institute, sikoku, vol. 18, no. 4, march 1987

contents: effect of m-a constituent on weld haz toughness of high strength low alloy steel; synthesis of dihydroxamic acid chelating polymers and the adsorptive property for uranium in sea water (in english); recovery of lithium from geothermal water; effect of ozone and oxygen-alkali pretreatment on enzymatic hydrolysis of thermomechanic..

corrosion resistance of silver-plated carbon-aluminum composite (abstract only),

the corrosion resistance of silver plated carbon aluminum composite with matrices of aluminum alloys in the al-si(1), al-zn-mg(2) and al-mg-si(3) systems was studied. silver plating was performed in a cyanide-thiocyanate electrolyte over a sublayer of nickel and copper precipitated from an ethylene diamine electrolyte. study of microsecti..

reciprocal regulation of acetylcholinesterase and butyrylcholinesterase in mammalian skeletal muscle, reprint: reciprocal regulation of acetylcholinesterase and butyrylcholinesterase in mammalian skeletal muscle

developmental regulation, from the fetal period to 11 months of age, and the influence of denervation on the appearance and disappearance of the molecular forms of acetylcholinesterase (ache) and butyrylcholinesterase (buche) in rat skeletal muscle were examined three principal forms, denoted by sedimentation coefficients of 4, 10.8, and ..

optimization of polycrystalline silicon solar cells produced by ion implantation and pulsed laser annealing. final report

polycrystalline silicon solar cells have been made by shallow, mass-analyzed ion-implantation followed by q-switched ruby-laser annealing. the influence of surface finish and of thermal treatments during and after pulsed-laser annealing on cell performance has been studied. screenprinted contacts have beem applied on these cells and the i..

composites reinforced with thermotropic liquid crystal copolyester fibers. technical rept

composites reinforced with thermotropic liquid crystal copolyester fibers (celanese vectran) have been studied with regard to fiber properties and fiber matrix adhesion. as-spun (as) and heat-treated (ht) fibers have been characterized. heat treatment increases the crystal-to-nematic melting point by 40 c and increases modulus 18 while do..

memoirs of the government industrial research institute, shikoku, no. 15. studies on mechanism of enzymatic maceration of bast fibers

in the study the molecular mechanism of the 'biochemical pulping,' or enzymatic maceration of the pectocellulosic bast fibers was clarified from two aspects: the aspect of enzymes responsible for the maceration and the aspect of components of the bast fibers subjected to the enzyme action. studies on identification, characterization and c..

les materiaux composites refractaires a haute performance (high-performance refractory composite materials)

applications of carbon and ceramic composites to throats and inlet/outlet sections of solid rocket nozzles, combustion chamber elements, and rocket engine mechanical parts are discussed application of these materials for hot structures of the hermes hypersonic vehicle and the sts 2000 space transport vehicle is also discussed. in addition..

novel applications of marine biopolymers

polymers produced by marine plants and animals have been long valued as food and industrial ingredients. recent developments in biotechnology, enzyme technology, and food and biochemical engineering have lead to new applications for these marine biopolymers. in the biomedical field, research is under way at mit to develop a process for th..