hydrophobic chitosan-lauric acid films and method of preparation patent application

the invention relates to compositions having low water vapor permeability prepared from protonated chitosan and lauric acid. in film form, the composite polymer can provide protection to enrobed substances from oxygen and other gases and to water and water vapor the chitosan-lauric acid films of the invention can be usefully employed as p..

kuitu-hankkeet 1990. (fibre projects 1990)

the starting point in the fibre-program is the paper industry's need to improve the quality of mechanical pulp and to cut down the consumption of energy in the production of mechanical pulp. the fibre research program for 1990 consists of the following projects sub-project 1-1: 'fundamental research into grinding' is aimed at investigatin..

visual inspection system for evaluating the interior surface of valve stems on material storage container tops

a nondestructive inspection for evaluating the interior surface of the small diameter valve stems on material storage container tops was mandated. the specifications required that the interior surface of the valve stem have a surface finish of (number sign)16 or better conventional methods which utilizes mechanical ''stylus-type''surface ..

nicaragua country set (1992). free trade export zone report (december 1991). export trade information

nicaragua's free trade zone, built during the late 1970's and used during much of the 1980's as a prison for opponents of the sandinista regime, is open for business. a recently passed free trade export zone law provides generous tax breaks for companies operating in the zone. two u.s. firms have already established operations in the zone..

fabrication of self-lubricating hard coatings by ion beam techniques. (quarterly technical progress report, january--march 1990)

the research effort at universal energy systems, inc. (ues) is focused at establishing optimum conditions for ion implantation/mixing of suitable additives into the surfaces of al(sub 2)o(sub 3) and zro(sub 2). in the last quarterly report, we presented the results of friction and wear properties of ion beam mixed baf(sub 2)/caf(sub 2)ag ..

research and development of two marine-degradable biopolymers rept. for 1 oct 89-30 sep 90

the navy is developing a biopolymeric film material suitable for fabrication into marine-disposable trash bags so that it can comply with impending national and international requirements which will prohibit the discharge of plastics into the sea. two biopolymers, chitosan and regenerated cellulose, were selected and tested to meet this n..

control of yba2cu3oy sol-gel solution structure by chemical modification of organic acid and its effects

since the discovery of the high temperature superconducting ceramics, numerous techniques have been tested in order to overcome the difficulties in the fabrication (e.g. porosity, preparation of specific shapes). the sol-gel process has been demonstrated to be ideal for the fabrication of high tc superconducting ceramic fibers or wires (1..

interfacial and thin film chemistry in electron device fabrication final rept. 15 sep 86-31 dec 91

progress on the columbia uri program on interfacial and thin film chemistry in electron device fabrication is reported for the 1986-1991 period. three broad areas of research included mbe growth and devices, laser surface interactions, and fundamentals of processing gas/surface interactions. research in the area of mbe growth and devices ..

canadian space agency, space station, strategic technologies for automation and robotics program technology development activity in protection of materials from the low earth orbit space environment abstract only

the strategic technologies in automation and robotics (stear) program is managing a number of development contracts to improve the protection of spacecraft materials from the low earth orbit (leo) space environment. the project is structured in two phases over a 3 to 4 year period with a budget of 3 to 4 million dollars. phase 1 is design..

biocompatibility assays. (latest citations from the biobusiness database). published search

the bibliography contains citations concerning methods for evaluating the biocompatibility of drug delivery systems, implant devices, dental alloys, intraocular lenses, collagen fibers, polymeric prosthetics, surgical sutures, and biosensor electrodes. in vitro and in vivo technologies, which include cell culture, whole blood perfusion, r..