A ring-imaging Čerenkov counter read out by a 100-channel PMT of active area 10×10 cm was operated successfully in a test beam at the BNL AGS with several radiator gases, including the heavy fluorocarbon C4F10 . Ring radii were measured for electrons, muons, pions and kaons over the particle momentum range from 2 to 12 GeV/c, and a best resolution of σr/r = 2.3% was obtained.

Herpes simplex virus, grown in BHKzI cells, was extensively purified by fluorocarbon treatment, ultracentrifugation, sucrose gradient centrifugation and chromatography on calcium phosphate. The purity of the product was assessed by immunodiffusion, electrophoresis in polyacrylamide gels and removal of added radioactive host material from the virus. Purified virus was disrupted with sodium dodec...

The compound HFC-23 (Trifluoromethane or CHF3), a potent greenhouse gas with a 100-year global warming potential of 11,700, is generated as a by-product during the manufacture of HCFC-22 (chlorodifluoromethane or CHClF2). This paper outlines options and issues for good practice guidance in the national inventory management of HFC-23 emissions from HCFC-22 production. The issues presented are or...

Experiments were performed to examine the effects of body force on flow boiling CHF. FC-72 was boiled along one wall of a transparent rectangular flow channel that permitted photographic study of the vapor-liquid interface just prior to CHF. High-speed video imaging techniques were used to identify dominant CHF mechanisms corresponding to different flow orientations and liquid velocities. Six d...

Performance enhancement of the two-phase flow boiling heat transfer process in microchannels through implementation of surface micro- and nanostructures has gained substantial interest in recent years. However, the reported results range widely from a decline to improvements in performance depending on the test conditions and fluid properties, without a consensus on the physical mechanisms resp...

A picosecond ultrasonics technique has been used to detect interfacial fluorocarbon (CF,) layers as thin as 0.5 nm between aluminum and silicon. The presence of the CF, material reduces acoustic damping and heat loss from the Al film into the Si substrate. This provides a means for noninvasive identification of organic/polymeric contaminants at the buried interface and potentially for character...

Four new Glycosyl-NucleoLipid (GNL) analogs featuring either a single fluorocarbon or double hydrocarbon chains were synthesized in good yields from azido thymidine as starting material. Physicochemical studies (surface tension measurements, differential scanning calorimetry) indicate that hydroxybutanamide-based GNLs feature endothermic phase transition temperatures like the previously reporte...