Nitrogen coolant

Inner cryostat wall Liquid nitrogen coolant Copper shield wire... 

High Temperature Superconductor (HTS) materials are wound within a cable system designed to also contain liquid nitrogen coolant. 

Attenuated total reflectance Eourier-transform infrared (ATR-ETIR) spectroscopy is another technique recently reported to have been applied to the determination of pesticide residues on human skin and residential surfaces (Doran et al., 2000). While this technique gave good results when evaluated in the laboratory for three pesticides at 0.5 to 5 Rg/m skin loadings, field use would be very limited by the size and transportability of the instrument and the liquid-nitrogen coolant for the detector. Whatever the method, surface residues are also difficult to measure quantitatively in situ, especially on the skin. 

A - direct aqueoas on-column injection B retention gap, prefaced to a 5.0/im film, DB-1 injection, 200/iL onto a 1.0 aun film DB-5, - direct headspace injection, column, no coolant c liquid nitrogen coolant. 200/uL into a 2 m - direct headspace... 

Tensile tests at 75 °F were made on standard tensile testing equipment. For tests at —320°F, specially constructed cryostats for the liquid-nitrogen coolant were used. All specimens were completely submerged in liquid nitrogen for a minimum of five minutes... 

Downstream of the thermal processor is an in-line analytical system capable of cryogenic trapping, separation, and detection of thermal decomposition products. For the replacement fluids, the thermal decomposition products were trapped using liquid nitrogen coolant at the head of a capillary GC column housed within an HP 5890 GC, The GC was then used to separate the products, and detection was accomplished using an HP 5970B mass selective detector (MSD). The MSD is a compact quadrupole mass spectrometer which permits analytes to be identified via their fragmentation patterns and quantified via peak areas. 

Cooling Rate (°C/min) Liquid Nitrogen Coolant with Helium Purge, Controlled Cooling to... 

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