planar flexible fiber-optic acoustic sensors

the acoustic sensitivity of optical fibers is considered analytically. high sensitivity is obtained with low bulk modulus, very thick polymeric coatings. the fiber coatings play an important role in determining the fiber acoustic sensitivity. the very thick coating limit is realized by embedding optical fibers in an appropriate elastomer ..

effect of surface treatment on interlaminar shear strength of cfrp

carbon fiber reinforced plastics (cfrp) are expected to be used in many applications, because they have outstanding mechanical properties. however, the fracture behavior of cfrp has a special feature such as an interlaminar shear one. in this paper, the effects of heat treatment and sizing on interlaminar shear strength (ilss) was investi..

protease immobilization onto copoly(ethylene/acrylic acid) fiber

water-insoluble proteases were prepared by immobilizing papain and chymotrypsin onto the surface of the copoly(ethylene/acrylic acid) fiber. the effect of the surface area of the copolymer fiber on the amount of the immobilized protease was investigated. the mode of the immobilization between protease and copolymer such as a covalent fixa..

surface modified polysulfone hollow fibers. iii. fibers having a hydroxide group

polysulfone ultrafiltration hollow fibers were chemically modified on the surface with propylene oxide and friedel-crafts catalysts. a peak at 1.6 ppm was observed in h**1-nmr spectrum of the modified fibers at 45 $degree$ c, while the peak was not observed at 27 $degree$ c measurements. the peak was attributed to a hydroxide group from t..

engineering plastics speed assembly

engineering plastics are those to which standard metal engineering equations can be applied and which are capable of withstanding high loads and stresses. there are more than 30 families of engineering plastics. engineering plastics' characteristics can be tailored to fit special purposes by alloying or blending. they are often modified b..

evaluation of intrinsic immobilized kinetics in hollow fiber reactor systems

immobilized cell and enzyme hollow fiber reactors have been developed for a variety of biochemical and biomedical applications reported mathematical models for predicting substrate conversion in these reactors have been limited in accuracy because of the use of free-solution kinetic parameters. this paper describes a method for determinin..

structure of a biocatalyst fiber containing modified $beta$ -galactosidase

a connection between the composition of the spinning solution intended for preparation of a biocatalyst fiber, the conditions of fiber spinning, and the porosity of the fiber structure is established. the possibility of purposefully regulating the catalytic properties of a biocatalyst fiber by varying the fiber structure is demonstrated. ..

fabrication and characterization of enfet devices for biomedical applications and environmental monitoring

we have realized an enzyme-modified fet device (enfet) in which the enzyme has been chemically linked to the fet surface by means of a layer of polymerized $left bracket$ 3-(2-aminoethyl)aminopropyl $right bracket$ trimethoxysilane (aeaps). the enzyme has been bound to the amino functional groups of the polysiloxane surface together with ..

development of a thermal micro-biosensor fabricated on a silicon chip

in order to develop a sensitive, versatile and inexpensive portable instrument, a calorimetric micro-biosensor was designed and fabricated by etching part of the flow system into a silicon wafer the utility of the device was tested using the enzymes, catalase and penicillinase. this sensor showed good reproducibility and linearity up to 1..

temperature and deformation distortions of optical parts under treatment

the necessity to take into account of thermal and thermoelastic effects when machining high-accuracy optical articles set one to consider heat transfer and heat release phenomena and their influence on the shape of final products. theoretical studies were conducted for machining glass articles with solid and ring-like tools. based on solu..