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PURIFICATION OF THE PRODUCTS OF AN ENZYMATIC REACTION FROM DILUTE AQUEOUS SOLUTION CAN BE ENERGY- AND EQUIPMENT- INTENSIVE. HOWEVER, TWO-LAYER MEMBRANE BIOREACTORS CONSISTING OF SANDWICHES OF PERMSELECTIVE AND IMMOBILIZED ENZYME MEMBRANES CAN BE DESIGNED TO SEPARATE AND CONCENTRATEREACTION PRODUCTS AS THEY ARE PRODUCED, THEREBY IMPROVING EFFICIENCY AND ECONOMY OF BIOCONVERSION PROCESSES. IN THE PR ...

MANY REVERSE-OSMOSIS MEMBRANES COMMERCIALLY AVAILABLE TODAY ARE MADE FROM POLYAMIDE OR POLYUREA MEMBRANES. THESE MEMBRANES GIVE HIGH SALT REJECTION AND HIGH WATER FLUX- YET ARE RAPIDLY DEGRADED WHEN EXPOSED TO TRACE LEVELS OF CHLORINE OR OTHER HALOGEN DISINFECTANTS USED FOR THE PRETREATMENT OF FEED WATERS. EFFORTS TO DEVELOP CHLORINE-RESISTANT MEMBRANES HAVE BEEN SLOW BECAUSE OF THE INCOMPLETE UND ...

VIRTUALLY ALL POLYMERIC MEMBRANES ARE MORE PERMEABLE TO OXYGEN THAN TO NITROGEN. IN CURRENT COMMERCIAL MEMBRANES THE RATIO OF OXYGEN TO NITROGEN PERMEABILITIES IS BETWEEN 2 AND 5. WITH THESE LOW SELECTIVITIES, THE HIGHEST-PURITY OXYGEN-ENRICHED AIR OBTAINABLE IN A SINGLE MEMBRANE STAGE ISABOUT 50%-AND MORE TYPICALLY, MEMBRANE PROCESSES MAKE 30 TO 35% OXYGEN. THIS PROPOSAL ADDRESSES THE DEVELOPMENT ...

THIS PROPOSAL ADDRESSES THE DEVELOPMENT OF A LIQUID OXYGEN ABSORBENT THAT COULD BE USED IN THE PRODUCTION OF HIGH-PURI-TY OXYGEN. WHEN USED IN THE TEMPERATURE-SWING MODE, AND IN CONVENTIONAL GAS/LIQUID CONTACTING EQUIPMENT, THE ABSORBENT COULD PRODUCE HIGH-PURITY OXYGEN (98 TO 99%). IT IS ANTICI CIPATED THAT SUCH A PROCESS WOULD BE COMPETIVE WITH CRYOGEN IC FRACTIONATION FOR THE PRODUCTION OF OXYG ...

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RESEARCH TO DATE RELATED TO VEHICLE ROUTING HAS ASSUMED THATTHE CUSTOMER WILL ONLY BE VISITED ONCE IN THE TIME PERIOD UNDER CONSIDERATION. USING THIS ASSUMPTION THE PROBLEMS ARETO ASSIGN EACH CUSTOMER TO A ROUTE, SEQUENCE THE ROUTE, AND SCHEDULE THE VISIT TO EACH CUSTOMER CONSISTENT WITH THE ROUTE. FOR A LARGE CLASS OF PRACTICAL VEHICLE ROUTING PROBLEMS, THE ONE TIME PERIOD ASSUMPTION IS NOT ADEQU ...

THE TRADITIONAL AQUACULTURE IN THE SOUTHERN USA EMPHASIZES THE PRODUCTION OF CATFISH AS THE MAIN CROP ORGANISM. DIVERSIFICATION OF THE GROWING INDUSTRY TO INCLUDE NEW CROPS IS NOW ESSENTIAL FROM A PRACTICAL VIEW. COVENANT AQUACULTURE CORPORATION PROPOSES TO EXAMINE THE PRODUCTION OF THE FRESHWATER PRAWN MACROBRACHIUM ROSENBERGII, AND TILAPIA, IN A POLYCULTURE SYSTEM, IN A PRODUCTION SCHEME SPECIFI ...

THE TASKS ASSOCIATED WITH THE SOUND MANAGEMENT AND DISPOSAL OF SLUDGES FROM INDUSTRIAL AND MUNICIPAL WASTEWATER TREATMENT OPERATIONS ARE COMPLEX AND EXPENSIVE. THE RECOVERY OF VALUABLE RESOURCES FROM SLUDGES MUST BE AN IMPORTANT INTENT OF THE SLUDGE MANAGEMENT TECHNOLOGIES OF THE FUTURE, IF THE COSTS ASSOCIATED WITH WASTE DISPOSAL OPERATIONS ARE TO BE CONTAINED. THE PROPOSED RESEARCH IS AIMED AT D ...

A METHOD FOR INCREASING THE SENSITIVITY OF NUCLEIC ACID HYBRIDIZATION REACTIONS INVOLVING NON-RADIOACTIVE DNA PROBES IS EXAMINED. PACIFIC BIOTECHNOLOGY RESEARCH ASSOCIATES HAS A PROPRIETARY METHOD WHICH INCREASES THE HYBRIDIZATION EFFICIENCY OF RADIOACTIVELY-LABELED GENETIC PROBES BY OVER 1000%. THIS METHOD WILL BE APPLIED TO COMMERCIALLY-AVAILABLE SYSTEMS WHICH PRODUCE NON-RADIOACTIVE DNA PROBES ...