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The occurrence of causative agents such as Cryptosporidium parvum and other pathogens in water supplies presents a critical issue. Transmitted through water and animals, these organisms provide a reservoir of infection, which results in the excretion of the environmentally stable cysts or oocysts that are impervious to inactivation by many drinking water disinfectants. Cryptosporidium infections a ...

Cryptosporidium, originating from contamination of public drinking water supplies, ponds, rivers, or swimming pools, have cause large-scale and deadly outbreaks, which became a major cause of waterborne infectious diseases. Since 1991, the percent of outbreaks attributable to Cryptosporidium has doubled, and in the 1993-1994 period, 17 percent of all outbreaks were caused by Cryptosporidium. In 19 ...

It is estimated that there are approximately 300 million tires discarded each year in the United States and this is in addition to the 800 million scrap tires that reside in landfills and tire dumps throughout the country. About 180 million are recycled, and the remaining 120 million scrap tires are discarded (legally or illegally) in landfills or tire dumps. Current tire reuse technologies offer ...

A1-CHEM FUELS, INC. HAS A PATENT PENDING FOR AN ELECTROTHER-MAL DEVICE TO PRODUCE MEDIUM TO HIGH BTU FUEL GAS FROM WASTEHYDROCARBON SOURCES. THIS UNIT OPERATES BY PRODUCING A HIGH-VOLTAGE ALTERNATING CURRENT ELECTRIC DISCHARGE ACROSS THE INTERFACE BETWEEN A WASTE HYDROCARBON AND WATER. THE EXTREMELY HIGH TEMPERATURE WITHIN THE ELECTRICAL DISCHARGE IS SUFFICIENT TO CAUSE LOCALIZED FAST PYROLYSIS OF ...

Pulsed electric field (PEF) disinfection is becoming well known as a possible means for the control of microorganisms in fluids. Although this technique has been shown to be effective against a wide variety of microorganisms, its widespread application is impeded by the high specific energy input (kWh/L) required. Conversely, the proposed enhanced PEF process promises a significant reduction in th ...

Not Available The purpose of the proposed research is to show that significant improvements in the performance of electrically tunable microwave devices can be obtained using a novel type of superlattice structures. The approach is based on recent work at Neocera showi

Not Available NASA SBIR Solicitation 98-1 emphasizes that ¿Advanced extravehicular activity (EVA) systems are necessary for the successful support of future human space missions.¿ Topic 09.05 recognizes that development of advanced EVA systems depends on ¿methods for..

Not Available Mod Works proposes to construct major airframe components using modern aluminum manufacturing process (MAM). The objective will be to reduce the cost of manufacturing while maintaining better surface quality. Major reduction in cost and labor requirement

Not Available There is rapid growth in the amount of remotely sensed (RS) image data. All future NASA and commercial remote sensing projects will have to deal with databases of unprecedent size and complexity. Providing an effective information link between these vast