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AERODYNE'S SPECTRAL CORRELATOR TECHNOLOGY WILL BE ADAPTED TODETECTION OF METHANE IN ITS 3.3 UM VIBRATIONAL MODE. THE RESULTING FAST (10 HZ), ACCURATE (BETTER THAN 3% OF AMBIENT)INFRARED METHANE DETECTOR WILL BE DESIGNED (PHASE I), RUGGEDIZED AND OPTIMIZED FOR FIELD USE (PHASE II). WHEN COUPLED TO AND CORELATED WITH SONIC ANEMOMETER MEASUREMENTS OF TURBULENT EDDY VELOCITY FLUCTUATIONS, THE SPECTRAL ...

CLEAN SOURCES OF ATOMIC CHLORINE ARE REQUIRED FOR MECHANISTIC STUDIES OF SEMICONDUCTOR ETCHING PROCESSES. IN THIS PROPOSAL, AERODYNE RESEARCH, INC. DESCRIBES MODIFICATIONS TO AN EXISTING ULTRAHIGH VACUUM COMPATIBLE, EFFUSIVE BEAM, MICROWAVE DISCHARGE FLUORINE ATOM SOURCE WHICH WOULD ALLOW ITS USE AS A SOURCE OF CHLORINE ATOMS, AND THEY DEFINE MEASUREMENTS TO CHARACTERIZE AND DEMONSTRATE ITS OPERAT ...

THE PURPOSE OF THE PROPOSED STUDY IS THE DEVELOPMENT OF INSTRUMENTATION TO MEASURE FLUXES OF ATMOSPHERIC TRACE GASES TO OR FROM THE EARTH'S SURFACE. THE METHOD WE PROPOSEIS BASED ON THE WELL ESTABLISHED EDDY CORRELATION TECHNIQUE AND WOULD USE A TUNABLE DIODE LASER LIGHT SOURCE COMBINED WITH A MULTIPLE PASS ABSORPTION CELL TO DETECT TRACE SPECIES AT SUB-PART-PER-BILLION LEVELS. THE PROPOSED INSTRU ...

ISOTOPIC CARBON ANALYSIS PROVIDES A VALUABLE TOOL FOR STUDIES OF METABOLIC PATHWAYS AND FOR TRACING CARBON TRANSFORMATIONS IN THE ENVIRONMENT. THIS PROPOSAL WOULD DEVELOP AN OPTICAL TECHNIQUE FOR THE CONVENIENT MEASUREMENT OF CARBON ISOTOPIC ((13)C/(12)C) RATIOS. THE INSTRUMENT WILL UTILIZE A LINEAR PHOTODIODE ARRAY TO IMAGE THE SPECTRA ARISING FROM PLASMA EMISSION OF THE CARBON-CONTAINING MOLECUL ...

THALLIUM BROMIDE (T1BR) IS A NEW CUBIC SEMICONDUCTOR. THE HIGH ATOMIC NUMBERS OF ITS CONSTITUENT ELEMENTS GIVES IT EXTRAORDINARY PHOTOELECTRIC ABSORPTION EFFICIENCY FOR GAMMA PHOTONS, WHILE ITS 2.5 EV BANDGAP PROMISES PERFORMANCE AT TEMPERATURES UP TO 250XC. IT HAS SHOWN SOME PROMISE AS AHIGH EFFICIENCY SOLID-STATE DETECTOR, BUT EARLY DEVICES WERELIMITED BY MATERIAL IMPURITIES AND IMPERFECTIONS. I ...

A KEY CONSIDERATION IN A VARIETY OF MANUFACTURING PROCESSES IS CONTROLLING EITHER THE POSITION OR SHAPE OF AN INTERFACE DEFINED AS THE BOUNDARY BETWEEN LIQUID AND SOLID MATERIALS OF DISSIMILAR COMPOSITION OR DENSITY TO WITHIN CERTAIN ALLOWABLE TOLERANCES. EXAMPLES OF SUCH DIVERSE PROCESSES ARE VERTICAL FREEZE BRIDGMAN AND CZOCHRALSKI CRYSTAL GROWTH AND ELECTROSLAG REMELTING FOR METAL REFINEMENT. A ...

DISRUPTION OF THE CELL ENVELOPE IS ONE OF THE FIRST STEPS IN THE RECOVERY OF MATERIALS CONTAINED WITHIN MICROBIAL CELLS. CONVENTIONAL TECHNIQUES TYPICALLY INVOLVE HIGH SHEAR, HEAT GENERATION, AND MULTIPLE STAGE PROCESSING, ALL FACTORS WHICH CAN LEAD TO DEGRADATION OF THE DESIRED PRODUCT. FURTHERMORE, THESE TECHNIQUES OFTEN LEAD TO THE CREATION OF SMALL CELL WALL FRAGMENTS WHICH ADDS TO THE BURDEN ...

RECENT ADVANCES IN LIQUID CRYSTAL TECHNOLOGY MAKE IT POSSIBLE TO CONSTRUCT TUNABLE BIREFRINGENT FILTERS OPERATINGOVER THE RANGE 3,500-20,000 ANGSTROMS, WITH PASSBANDS AS NARROW AS 50 ANGSTROMS. THE CENTER WAVE-LENGTH OF THIS FILTER CAN BE SELECTED ELECTRONICALLY, IN A FEW MILLISECONDS, WITH NO MOVING PARTS. THESE FILTERS SHOULD BERELATIVELY INEXPENSIVE TO PRODUCE ($1K-2K). THE RESEARCHERSPROPOSE D ...

MANY ORGANIC POLLUTANTS AND BIOLOGICAL ORGANISMS ARE NOT EFFECTIVELY REMOVED BY BIOLOGICAL OXIDATION IN MUNICIPAL WASTE TREATMENT FACILITIES OR IN NATURAL WATER COURSES. THESE REFRACTORY ORGANICS, AFTER CHLORINATION, MAY FORM NOXIOUS CHLORINATED ORGANICS AND CAUSE GENERAL DETERIORATIONOF THE WATER SUPPLY. THIS PROPOSAL ADDRESSES THE FEASIBILITY OF ADSORBING AND ELECTROCHEMICALLY OXIDIZING THESE RE ...

COLD WEATHER PROTECTIVE CLOTHING OF TODAY CONSISTS PRIMARILY OF MANY THIN LAYERS OF INSULATING MATERIAL. IT WOULD BE FAR MORE DESIRABLE IF COLD WEATHER PROTECTIVE CLOTHING COULD RELEASE USEFUL AMOUNTS OF HEAT FOR PERIODS OF TIME DURING WHICH THE WEARER'S BODY WAS UNABLE TO PROVIDESUFFICIENT HEAT TO MAINTAIN BODY TEMPERATURE. THIS APPROACHIS SIMILAR IN CONCEPT TO THE USE OF PHASE CHANGE MATERIALS T ...