continuous hybridoma growth and monoclonal antibody production in hollow fiber reactors-separators

growth of a hybridoma culture, along with production of monoclonal antibody, was demonstrated over extended periods in polysulfone hollow fiber membrane modules. the molecular weight cutoffs of the membranes were 10,000, 50,000, and 100,000 daltons the hybridoma cell line, designated 65/26, produced igg (2b/ $kappa$ ) directed at mouse th..

everting (toposcopic) catheter for broad clinical application

the advanced development of the clinical everting (toposcopic) catheter is described. a detailed discussion of the design and outline of the fabrication techniques are followed by a thorough performance evaluation and summary of the first two clinical applications. the everting element is a low-durometer thermoplastic polyurethane elastom..

gmt: ein werkstoff nach mass. $left bracket$ glass mat-reinforced thermoplastics for automobiles - gmt: a material tailer made $right bracket$

this paper describes the glass mat-reinforced thermoplastics sheets, based on polypropylene, that are produced in switzerland these materials are used in automobiles. mechanical, physical and processing properties are tabulated and evaluated. automobile parts made of gmt are illustrated by photo. this material is particularty suitable for..

shear beauty: towards the perfect surface

the paper deals with recent developments in the shearing machines used in the tufted carpet manufacturing operations. the improvements developed deal with the problems associated with finger gauges, higher pile densities, changes in pile fibers, surface finishes, increased shearing capacities, consistent quality, reduction in wastages and..

alkali-explosion pretreatment of straw and bagasse for enzymic hydrolysis

sugarcane bagasse and wheat straw were subjected to alkali treatment at 200 $degree$ c for 5 min and at 3. 45 mpa gas pressure (steam and nitrogen), followed by an explosive discharge through a defibrating nozzle, in an attempt to improve the rate and extent of digestibility. the treatment resulted in the solubilization of 40-45 of the co..

porous polymers && fusible films

new fibers and new polymer coatings based on poly(vinyl chloride) and polyurethanes, together with specially developed processing and coating techniques, offer potential advantages where fabrics are to be subjected to a harsh environment. thus the tensile strength, tearing strength and dimensional stability are imparted by the textile fab..

mass loss of shuttle space suit orthofabric under simulated ionospheric atomic oxygen bombardment

in the last few years there has been increasing awareness that many polymeric materials used for thermal protection and insulation on spacecraft degrade significantly under prolonged bombardment by ionospheric atomic oxygen. the covering fabric of the multilayered shuttle space suit, termed 'orthofabric' by its designers, is composed of a..

basic-practical chemistry of the cotton cellulose fiber

basic research on the chemistry of cotton is discussed with linkage to practical problems in chemical finishing. the need for new methodologies in this research is stressed. migration on finishing agents is shown to occur in a predictable manner; ie. , laterally during slow drying, thicknesswise during rapid drying plus superimposed trans..

preprints for the 110th isij meeting, part i

this conference proceedings contains 40 papers arranged under the following headings: ironmaking; steelmaking; shaping and fabrication; instrumentation and control; chemical analysis; surface treatment; products and properties; and new materials and new processing. the papers cover blast furnace practice, physical chemistry, microstructur..

preprints of the 109th isij meeting, part iii

this conference proceedings contains 48 papers arranged under the following headings: ironmaking; steelmaking; shaping and fabrication; instrumentation and control; chemical analysis; surface treatment; products and properties; and new materials and new processing. the papers cover blast furnace practice, physical chemistry, microstructur..