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FLUORESCENT PROBES SELECTIVE FOR THE NEWLY IDENTIFIED D-3 DOPAMINE RECEPTOR (DA) ARE BEING DEVELOPED. SINCE ITS DISCOVERY, THE D-3 RECEPTOR HAS BEEN RECOGNIZED AS A MEMBER OF THE D-2 LIKE FAMILY OF DA RECEPTORS AND IS CONSIDERED TO BE A POSSIBLE SITE OF ACTION OF ANTIPSYCHOTICS. RECENTLY, 7-HYDROXY-2-(N,N-DIPROPYL) AMINOTETRALIN (7-OH-DPAT) WAS IDENTIFIED AS A POTENT AND SELECTIVE LIGAND FOR D-3 ...

RECENTLY DECLASSIFIED MILITARY RESEARCH HAS VALIDATED THE APPLICABILITY OF ARTIFICIAL GUIDE STARS TO ATMOSPHERIC COMPENSATION FOR ASTRONOMICAL OBSERVATIONS. OF THE TWO ALTERNATIVE GUIDE-STAR TECHNIQUES THAT HAVE BEEN DEMONSTRATED, THE MORE PROMISING IS THE LASER-INDUCED GENERATION OF AN ARTIFICIAL STAR IN THE SODIUM LAYER LOCATED AT AN ALTITUDE OF 95 KM. THE REQUIRED LASER POWER DEPENDS STRONGLY ...

THE USE OF HIGH ENERGY (1-5 MEV), HIGH POWER (250 KW-1 MW) ELECTRON BEAMS ALLOWS THE LOW COST FABRICATION OF UNIQUE HIGH TEMPERATURE MATERIALS WHICH ARE NOT ECONOMICALLY MANUFACTURED USING CONVENTIONAL FABRICATION METHODS. MATERIALS WHICH CAN BE FABRICATED USING THIS PROCESS INCLUDE NICKEL-BASED SUPER-ALLOYS WITH GRADED THERMAL AND MECHANICAL PROPERTIES AND CERAMIC-REINFORCED TIXA1 AND NIXA1 META ...

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IN THE PRODUCTION OF PHARMACEUTICALS, BOTH THE WORK PIECE AND THE PACKAGING ARE TOO SMALL FOR CONVENTIONAL BAR CODES. OF PARTICULAR IMPORTANCE IS THE USE OF AUTOMATIC IDENTIFICATION TO VERIFY THE CORRECT LABELING OF PHARMACEUTICALS. MISLABELING HAS BEEN A PERSISTENT SAFETY PROBLEM AND PRODUCTION LINES FOR LABELING ARE CLOSELY REGULATED AND INSPECTED BY THE FDA. ALSO, PRODUCERS OF SEMICONDUCTOR ...

THE HYDROXYL RADICAL (OH) PLAYS A KEY ROLE IN THE PHOTOCHEMISTRY OF BOTH THE TROPOSPHERE AND THE STRATOSPHERE. IT IS THE PRIMARY OXIDIZING AGENT RESPONSIBLE FOR THE REMOVAL OF MOST TRACE GASES INCLUDING CO AND CH4. SINCE THE OH RADICAL DETERMINES THE LIFETIMES AND, THUS, THE CONCENTRATIONS OF MANY CHEMICAL SPECIES, ACCURATE DETERMINATION OF OH CONCENTRATION IS PIVOTAL IN UNDERSTANDING ATMOSPHERI ...

ULTRAFAST LASERS (LASERS THAT GENERATE PULSES WITH DURATIONS OF ~10 PICOSECONDS OR LESS) HAVE A LARGE NUMBER OF APPLICATIONS IN BIOCHEMISTRY, CHEMISTRY, PHYSICS, AND ELECTRICAL ENGINEERING. UNFORTUNATELY, THESE SYSTEMS ARE DIFFICULT TO USE LARGELY BECAUSE ULTRAFAST LASER PULSES ARE EXTREMELY DIFFICULT TO CHARACTERIZE AND FEW TECHNIQUES ARE CURRENTLY AVAILABLE. THOSE THAT ARE AVAILABLE USUALLY AR ...

RESEARCHERS ARE TESTING THE USE OF LASER DIODE ARRAYS FOCUSED DIRECTLY ONTO THE WORK PIECE FOR RAPID HEATING OF MATERIALS. LASER DIODE ARRAYS ARE MUCH SMALLER AND MORE EFFICIENT THAN FLASH LAMPS OR OTHER ELECTRICALLY POWERED LASERS, SUCH AS CO2. AN INSTRUMENT THE SIZE OF A HOT AIR BLOWER COULD DELIVER OVER TEN KILOWATTS OF LIGHT ENERGY FOR HARDENING THE SURFACE OF ALLOYS IN STRUCTURES SUCH AS BO ...

THE STATE-OF-THE-ART X-RAY IMAGE ENHANCING DEVICE IS THE BUCKY GRID WHICH ALLOWS PRIMARY RADIATION TO PASS THROUGH UNIMPEDED WHILE STOPPING THE PASSAGE OF SCATTERED RADIATION FROM REACHING THE X-RAY FILM AND FOGGING THE IMAGE. GRIDS CONSIST OF A SYSTEM OF VERTICAL LAMELLAE MADE OF ALTERNATING RADIOPAQUE AND TRANSPARENT LAYERS. THE BUCKY GRID IS LIMITED IN MEETING THE CURRENT DEMANDS OF RADIOLOGY ...

DUE TO THEIR SMALLER SIZE, WEIGHT, AND REDUCED POWER REQUIREMENTS, FLAT PANEL DISPLAYS (FPDS) BASED ON AC-DRIVEN THIN FILM ELECTROLUMINESCENT PHOSPHORS ARE EMERGING AS A HIGHLY DESIRABLE ALTERNATIVE TO TRADITIONAL CATHODE RAY TUBES (CRTS). AT PRESENT, HOWEVER, NO SINGLE PHOSPHOR MATERIAL IS CAPABLE OF EMITTING THE THREE PRIMARY COLORS (RED, GREEN, BLUE) WITH SUFFICIENT INTENSITIES TO PRODUCE A WH ...