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A collagen-urease membrane complex of relatively stable enzymatic activity was successfully produced. In order to evaluate the potential use of this complex for the treatment of urinous wastewater, a biocatalytic reactor module of a novel spiral wound configuration was constructed and integrated into a prototype system containing reverse osmosis and ion exchange processes. The unit that was designed and constructed was sized so as to be capable of generating sufficient process data that could be used in the estimation of the system design parameters. This work was accomplished by using a synthetic urinous feed solution containing sodium chloride and urea as the major contaminants. The performance of the biocatalytic reactor module was simulated using a transport model consisting of factors which account for simultaneous mass transfer and biochemical reaction. The model was based upon the assumptions of steady-state, plug-flow, and Michaelis-Menten kinetics. From this model, the apparent Michaelis-Menten kinetic parameters were estimated and computer simulated curves were compared to the actual performance data of the biocatalytic reactor module under a variety of reactor feed flow rates and urea concentrations.

The feasibility of the concept for a portable blast-diverting platform for vertical takeoff and landing (VTOL) aircraft was previously demonstrated by scale model tests. The platform would be assembled in the field from modules. Each module consists of a structural base containing air-deflector vanes and a load-bearing, gridded top. The platform would direct aircraft exhaust blast away from the aircraft and into the air to prevent terrain erosion, hot gas ingestion, adverse ground effects, and telltale 'signature' generated by military activity. The present research study to develop a design concept for a full-scale portable modular platform includes thermodynamic considerations, establishment of design criteria, a materials survey, and structural analyses. In the development of the design concept, ease of handling and field erection of the platform, minimization of special tooling, use of simplest manufacturing procedures, and cost savings in all areas were also considered. The study demonstrates that this type of modular platform can be designed for use with aircraft of various weights and engine exhaust characteristics.

The general objective is to evaluate a clad carbide emitter, thermionic power module which simulates nuclear reactor installation, design, and performance. The module is an assembly of two series-connected converters with a single common cesium reservoir. The program goal is 500 hr cumulative operation at a power density of 7 watts/sq. cm. and an efficiency of 12%. This report describes progress made during the third program quarter, including: (1) Completion of fabrication of all clad fuel structures; (2) Completion of heat treatments and subsequent initiation of metallurgical evaluations of clad fuel specimens; (3) Completion of fabrication of all module components; and (4) Assembly of the module. At completion of module assembly, a rigorous leak-check revealed the presence of a very slight leak in one end of the collector insulator tube. (Author)

Full geometry control over anodic oxide growth on n-type silicon web has been achieved within the present accuracy of the opticacaace recombination velocity in silicon as a function of the impurities incorporated into an oxide film, and as a function of applied cell bias (field-effect), has become fully operational. Doped anodic oxide films have been used as localized diffusion sources without masking the rest of the silicon surface with an undoped oxide layer. Many experimental passivated functional electronic blocks (FEB's) fabricated at Westing house have been examined in the scanning electron microscope. Also examined were several inte grated semiconductor devices purchased on the open market, and several specially fabricated devices. A method has been successfully developed and demonstrated for positioning the gate elec trodes on silicon field-effect devices utilizing a feedback signal derived from the workpiece. (Author)