Thaw point

Taupunkt, m. dew point thaw point. Taurochol-salz, n. taurocholate. -saure, / taurocholic acid. 

Tetramethylene glycol, 250 Thaw-melt method, 28 Thaw point, 29... 

For the studies preformed by this group on the anthracene + pyrene system (Rice et al., 2010), mixtures were prepared at various compositions by using a melt and quench-cool technique (Fu et al., 2010). Generally, the melting points and enthalpaes of fusion of these PAH binary mixtures were found to often actually be independent of mixture preparation techniques. The hquidus and thaw points were determined according to the method proposed by Potmder an Masson (Pounder and Masson, 1934). The thaw temperature is the temperature at which the first droplet of liquid appears in a mixture-containing capillary. The liquidus temperature is the maximum temperature at which both solid crystals and liquid are observed to coexist. Above this temperature, there is only liquid phase present. 

At this point, two options are available if required. (1) If more complete degassing is desired, freeze the liquid contents by soaking the appropriate part of reaction vessel in dry ice/acetone bath, evacuate to 10 pm Hg, then thaw the contents, followed by an additional 10 min degassing. (2) If the removal of residual 1602 is desired, mix the two solutions by tilting the vessel to consume the 1602 by luciferin-luciferase luminescence reaction. The resulting reaction will cease in 2-3 min. Then, degas the content for 1-2 min to remove the C02 produced in the luminescence reaction. 

Special formulations have been developed for cementing operations in arctic regions or for deep water applications [206,208,256,720,739,1792]. In low-temperature formations, wherein the cement is subjected to freeze-thaw cycling, freezing-point depressants must be added. Salts may serve as such, but traditional organic freezing-point depressants, such as ethylene glycol, also may be added [1022-1024]. 

Fig. 3.4.11 Two-dimensional slice images ta- (e) freezing front and (f) freezing front. The ken from a three-dimensional Spiral-SPRITE measurement parameters were FOV 60x60 cyclical freezing and thawing experiment. x 60 mm, acquisition points 64 x 64 x 32,...

The addition of TKPP lowers the freezing point of the fluid significantly. This offers the opportunity of using a subfreezing TKPP mud to drill through strata, i.e., the permafrost in Alaska and Canada, without thawing of the... 

At some point in time we may want to thaw the sample, for example, because we want to discard it, or because we want to use it for other experiments, or because we want to add a reactant (e.g., substrate or reductant) before freezing it again for... 

Stability — Samples remain stable for at least 468 days when frozen at -20°C. They are stable for at least five simulated freeze-and-thaw cycles and approximately 28 hr at room temperature. The analyte is viable for at least 6 days in a reconstitution solution stored in the autosampler (temperature set point at 10°C). A dried-down batch (sample process stopped at dry-down step) was stable at least 5 days in a refrigerator (temperature varied from 4 to 8°C). A stock solution of paricalcitol is stable for at least 11 months. Stock solution of internal standard is stable about 4.5 months under refrigeration. 

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