the electrical properties and device applications of homoepitaxial and polycrystalline diamond films

electronic applications of semiconductor diamonds are addressed. doping and electrical properties of these films, formation of low-resistive 'ohmic' contacts, surface modification methods, and experimental device applications are discussed. of particular interest are high-temperature (300 $degree$ c) mosfets and metal contacts to cvd (che..

creep feed grinding of ceramics and ceramic-matrix composites with slotted && perforated wheels

electroplated and vitrified bonded diamond grinding wheels with unique structure were newly developed which have slots/segments and cooling holes in the wheel working surface for creep feed grinding of ceramic materials. silicon nitride was ground with 64 of the grinding power required with a conventional wheel. wear flats of diamond grit..

some properties of trypsin on the surface of fibrous carbon materials

with the objective of changing the chemical nature of the surface of aktilen, and increasing its uniformity and reducing its specific surface, we carried out a gas-phase synthesis of a pyrocarbon layer from methane in the isothermal zone of a quartz reactor at a temperature of 900 $degree$ c. the rate of formation of the pyrocarbon was 3...

spray deposition patterns during simulated work activities by lawn care specialists

this simulated field study investigated patterns of spray deposition on the clothing of lawn care applicators using a tank truck and handheld spray gun. the purpose was to provide a basis for designing a protective garment for lawn care specialists. the influence of flow rate and experience level of applicators on spray deposition was stu..

mechanism of in situ surface modification of molten-carbonate fuel cell anode

the performance of the anode of a molten-carbonate fuel cell (mcfc) is improved by the addition of tungstate ion to the electrolyte. this effect is due to reduction of tungstate ion to produce tungsten metal on the porous nickel electrode under a hydrogen atmosphere. the total anode reaction is the sum of the following consecutive reactio..

investigation of zinc-binding affinities of moloney murine leukemia virus nucleocapsid protein and its related zinc finger and modified peptides

nucleocapsid proteins of retroviruses are small basic, nucleic acid-binding proteins with either one or two 'cys-his' boxes, which have been shown to be involved in genomic rna dimerization, encapsidation, and replication primer trna annealing to the initiation site for reverse transcription. the nucleocapsid (nc) protein of moloney murin..

solution structure of human growth hormone-releasing factor fragment (1-29) by cd. characteristic conformational change on phospholipid membrane

the conformations of synthetic human growth hormone-releasing factor fragment (1-29) in the presence and the absence of 1, 2-dimyristoyl-sn-glycero-3-phosphorylglycerol liposome as well as in aqueous 2,2,2-trifluoroethanol solution were investigated by cd spectroscopy. the secondary structure of the peptide in each solution was analyzed b..

embossed gratings in sol-gel waveguides. pre-emboss heat treatment effects

an embossing technique is used to fabricate surface-relief gratings into sio//2-tio//2 dielectric, step-index, planar optical waveguides, fabricated using a sol-gel process. the influence that a pre-emboss bake cycle has upon the embossibility of the sio//2-tio//2 sol-gel films is described. through sem evaluation, the embossed grating ru..

examination of deterioration behavior of carbon fiber-matrix interface owing to water absorption by torsional braid analysis

the influence of water absorption on the deterioration of carbon fiber reinforced plastics (cfrp) was investigated from the viewpoint of the interfacial change in bonding. carbon fiber braids impregnated with epoxy resin were made and cured. and they were tested by torsional braid analysis (tba) after immersion in boiling water. the follo..

effect of surface pretreatment on carbon fiber-polyimide matrix composite bonding

the single lap shear test and the wedge test were used to evaluate the effect of surface pretreatment on the strength and durability of adhesively bonded composite joints. both types of joints were placed in three different environments: (1) room temperature, desiccator, 1000 h; (2) 204 $degree$ c, 1000 h; (3) immersion in boiling water f..