Abstract: A case bonded end burning solid propellant rocket motor utilizing a propellant having sufficiently low modulus to avoid chamber buckling on cooling from cure and sufficiently high elongation to sustain the stresses induced without cracking, the propellant being zone cured within the motor case at high pressures equal to or approaching the pressure at which the motor will operate during combustion. A solid propellant motor having a burning time long enough that its spacecraft would be limited to a maximum acceleration of less than 1 g is provided by one version of the case bonded end burning solid propellant motor of the invention.

Abstract: A novel aldehyde-containing polymer (ACP) is prepared by reaction of a polysaccharide with periodate to introduce aldehyde groups onto the C.sub.2 - C.sub.3 carbon atoms and by introduction of ether and ester groups onto the pendant primary hydroxyl to modify solubility characteristics. The ACP is utilized to absorb nitrogen bases such as urea in vitro or in vivo.

Abstract: A polymer system and resulting method useful for absorbing fats or oils which comprises forming a solid, network polymer having a minimal amount of cross-linking. The polymer that remains solid at a swelling ratio in oil or fat of at least ten and thus provides an oil absorption greater than 900 weight percent.

Abstract: This application discloses lightly cross-linked, swellable polymers including both oleophilic and hydrophilic chains. The polymers have an unusually high capacity for absorbing from solution large organic molecules containing polar groups. The polymers are free of components leachable in the gastrointestinal tract, have low oral toxicity and dermal sensitivity and can be utilized in vitro or in vivo to absorb lipids from bile. The polymers have exhibited absorption as high as 309% total and 59% solids from a concentrated micellar bile. Cholesterol, lecithin and sodium cholate were confirmed in the absorbate by thin-layer chromotography.