metal collection using chelating hollow fiber membrane

three kinds of functional groups, iminodiacetate (ida), amidoxime (ao), and phosphoric acid (pa), were introduced into a microfiltration hollow fiber membrane by radiation-induced grafting and subsequent chemical modification. the chelating hollow fibers containing ao or ida groups exhibited a 1.1 m**3/(m**2-hr) pure water flux at 100 gra..

novel photoreactive amphiphile of nitrophenylazide for immobilization of bioactive proteins

monolayers of an amphiphilic nitrophenylazide (anpa) derivative were prepared and their ability to immobilize a protein molecule by a photochemical binding reaction was demonstrated as a novel means to constitute a biofunctional membrane. molecular orientations and photoreactions in the anpa monolayers were investigated by fourier transfo..

studies of structure formation in grafting of polyacrylonitrile to polycaproamide fibers

the relationship between the basic structure parameters of a polycaproamide (pca) substrate and the structure of grafted polyacrylonitrile (pan) was studied. the influence of the total degree of crystallinity of the pca fiber, its crystal modification, and the orientation of crystallites on the pan structure in the copolymer were analyzed..

improved junction properties of au-n-gasb schottky diodes after chemical modification of gasb surfaces

polycrystalline n-gasb grown by the vertical bridgman method was chemically treated with ru**3** $plus$ ions. electrical characterisation showed improvement in the electron mobility from 1162 to 1442 cm**2/v s, while the carrier concentration remained almost constant (1 $multiplied by$ 10**1**7 cm** $minus$ **3) schottky diodes were fabri..

investigations into machining of composites

fibre reinforced plastics (frp) have an important place in the field of engineering materials. initially, the main emphasis in research was on the development of materials. currently, however, more attention is being paid to the industrial production of frp products. normally, conventional methods for machining of these materials are used..

some aspects of carbon fiber type and its surface treatment on the nucleation behavior of poly(p-phenylene sulfide) based composites

the morphology of poly(p-phenylene sulfide) in materials containing few carbon fibers was analyzed. the effects of crystallization temperature, the molecular weight of the polymer, as well as the type of carbon fiber and its surface treatment on the nucleation behavior of pps were studied by hot stage optical microscopy. low crystallizati..

modification of carbon fibres in a pulsed high-enthalpy flow

carbon fibers were surface-treated with pulsed plasma in argon or hydrogen. in both cases, etching craters formed on the surface fibers. the gravimetric method was used to measure the two components of surface energy: dispersion and polar. the polar component after treatment increases from 21-30 mj/m**2. it is assumed that the polar group..

measurement of the surface of textiles during microwave drying using a thermographic phosphor

surface temperature measurements of textile materials during exposure to microwave energy are nearly impossible to obtain using conventional temperature measurement methods. wool fabric surface temperatures were obtained using laser-induced fluorescence of the thermographic phosphor, europium-doped lanthanum oxysulfide (la//2o//2s:eu**3**..

molecular resolution analysis of $alpha$ -feooh-dispersed activated carbon fibers

the irregularity of the micropore walls of $alpha$ -feooh-dispersed activated carbon fibers ( $alpha$ -feooh-acf) was examined by the adsorption of planar, spherical, and zigzag molecules at 303 k and powder x-ray diffraction at room temperature. $alpha$ -feooh-acf gave more diffuse x-ray diffraction patterns with high background than the..

annular-gap mills by welte - a remarkable new way to prepare glazes

the purpose of the glaze is to decorate, or refine, the ceramic body. the qualities of the glaze largely determine the qualitative properties of ceramic products, e.g. their resistance to acids, caustic solutions, water, etc. a wellprepared glaze in attractive colors, with no hairline cracks, is usually what makes the purchaser decide to ..