drawing of high-strength long-length optical fibers for submarine cables

a drawing process for high-strength long-length optical fibers intended for submarine cables was developed using a carbon resistance furnace. surface treatment conditions for preforms as well as drawing furnace cleanliness for minimizing flaw formations on the fibers during the drawing process are described. furthermore, an evaluation of ..

low dark-current, planar ingaas p-i-n photodiode with a quaternary ingaasp cap layer

the authors report the successful fabrication of in//0// //5//3ga//0//. //4//7as p-i-n diodes with room temperature dark-currents as low as 0. 1 na at $minus$ 10 v bias by introducing a quaternary ingaasp cap layer on the ternary ingaas. in this new structure the ingaasp cap layer undergoes the surface treatment and faces the dielectric s..

polarographic measurement of tissue metabolites

microelectrodes have been constructed for measuring glucose, lactate and other metabolites in tissues with special reference to ischaemic brain and soft tissue wounds. the electrodes were either glass coated, platinum-iridium needles with a tip diameter of 0. 5 to 1. 0 $mu$ m, or carbon fiber electrodes set into glass. the glucose-measuri..

immobilisation of enzymes in membranes for use with electrochemical sensors

instead of measuring the rate of enzyme catalysis amperometrically, the authors measure oxidaze-mediated peroxide formation potentiometrically with an iodide ion-selective transducer the principle of the technique is to immobilize physically the oxidaze, glucose oxidaze, in a poly $left bracket$ vinylchloride $right bracket$ (pvc) membran..

recent developments in coated apparel

recent advances in polymer coatings have been associated mainly with polyurethanes (pus) and acrylics, both of which are amenable to basic changes in chemical composition to achieve new performance levels. silicones, and to a lesser extent the fluorocarbon rubbers, have also flourished for specialist applications. a combination of these l..

novel separation technique using aerobic coupling reactions

the authors have found that binuclear cuprous compounds, in particular cuprous chloride, have the ability to cause phenols, mercapto compounds, inorganic sulfides, anilines and phenylenediamines to undergo facile aerobic coupling reactions under mild reaction conditions. this means that these substances, which are often found in industria..

effect of gold-tin intermetallic compound on the low cycle fatigue behavior of copper alloy c72700 and c17200 wires

many connectors and springs fabricated from copper-base spring materials require a gold-plated surface finish. often such parts are joined or interconnected to the electronic package by soldering with tin-lead solder. upon application of heat, the gold plating may interact with the tin contained in the solder to produce a brittle intermet..

biochemical oxidation of caprolactam-containing wastewater from the production of synthetic fibres

the authors investigated the effect of nitrosomethylurea (nmm) on the biodegradative power of active sludge in cleaning up solutions which contain caprolactam. the mutant forms of the biodegraders which appeared as a result of treatment with nmm adapted without difficulty in the natural biocenosis of the active sludge, since their seedabi..

plastics give you more strength for your money

automotive engineering tends to be the area that drives most of the research into new processes, blends and materials. the development of more plastics components suitable for use in mass market motor cars can lead to huge volumes of raw material sales higher strengths, better surface finishes, improved paint adhesion, and modified energy..

preprints for the 110th isij meeting: part v

this conference proceedings contains 44 papers. they are arranged as follows: ironmaking; steelmaking; shaping and fabrication; instrumentation and control; chemical analysis; surface treatment; and products and properties. all of these papers are indexed separately. technical and professional papers from this conference are indexed and a..