Results 301 to 310 of about 1,073,601 (348)
Advanced Functional Materials, EarlyView.The THz drive of the Mott insulating state of a rare‐earth nickelate induces instantaneous insulator‐metal transition via quantum tunneling of valence electrons across the bandgap. This transition is pure electronic and highly non‐thermal, which may find its applications in ultrafast opto‐electronics with enhanced performance and minimal device size ...
Gulloo Lal Prajapati +7 more
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Cooling Rates During Flash Cooling [PDF]
Journal of Applied Crystallography, 1998 Flash cooling of macromolecular crystals was investigated by measurement of the cooling rates achieved by different cryoprotectant solutions (glycerol, sucrose and polyethylene glycol) with different sample volumes (0.2–0.8 mm3) and by different cooling agents (cold nitrogen or helium gas, liquid nitrogen and liquid propane).
K. Moffat, T. Y. Teng
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Journal of Milk and Food Technology, 1973
Rapid cooling is essential to prevent multiplication of microorganisms in potentially hazardous foods. This requirement is frequently not met with viscous foods in large containers. The time required to cool an 8-gal container of white sauce from 105 to 57 F was 25 hr.
R. B. Read, R. W. Dickerson
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Rapid cooling is essential to prevent multiplication of microorganisms in potentially hazardous foods. This requirement is frequently not met with viscous foods in large containers. The time required to cool an 8-gal container of white sauce from 105 to 57 F was 25 hr.
R. B. Read, R. W. Dickerson
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Transactions of the Canadian Society for Mechanical Engineering, 1983 Numerical modelling techniques are used to investigate the effect of heat source shape on the cooling rate (at 700 C) of edge welds. Cooling rates are determined for point, line, planar and volume heat sources. These, in turn, are compared to experimental values and to cooling rates calculated by the traditional Adams[1] relationship where the heal ...
A.S. Oddy, M.J. Bibby
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Cool! Rates of Heating and Cooling
Journal of Chemical Education, 2007In this Activity, students measure and graph the rate of warming for a chilled thermometer bulb held in room temperature air, for a chilled bulb held between two fingers, and for a few milliliters of chilled water. Students are familiar with the everyday phenomena of warming, but measurement affords the unexpected result that the process is not linear.
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Plunge‐cooling of tissue blocks: determinants of cooling rates
Journal of Microscopy, 1985SUMMARYTissue blocks have been plunged into a liquid coolant and the resultant ice‐crystal damage is discussed. Some blocks have been frozen without apparent ice‐crystal damage; they were not treated with cryo‐protectants but were mounted on streamlined foil supports which separated the specimen from the thermal mass of the support pin.
Keith P. Ryan, David H. Purse
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Cooling rates in splat cooling
Materials Science and Engineering, 1967Abstract Calculations and experimental observations made on cooling rates during splat quenching are presented. Three possible types of cooling behavior are discussed: ideal cooling, intermediate cooling and Newtonian cooling. The effects of splatting-process variables on the cooling rates are described, the most important of these variables being ...
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Cooling rates of the B♭ trumpet
Applied Acoustics, 1992Abstract The temperature of the air column within a trumpet is strongly influenced by that of the body of the instrument. The thermal properties of the trumpet have, therefore, a direct impact upon its physical acoustics. This paper describes the cooling of a trumpet and presents experimental results which are consistent with standard theoretical ...
Anthony Simpson +2 more
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Effect of cooling rate and alloying on the
Metallurgical Transactions, 1973The pearlitic hardenability of a high-purity Fe-0.8 pct C alloy and zone-refined iron binary alloys containing Mn, Ni, Si, Mo, or Co was studied by means of hot-stage microscopy. The binary alloys were carburized in a gradient furnace to produce eutectoid compositions, thus eliminating proeutectoid phases.
A. R. Marder, B. L. Bramfitt
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On crystal size and cooling rate
Journal of Microscopy, 1986SUMMARYA theoretical model is proposed which is used to derive a quantitative relationship between the critical cooling rate and average crystal size at any location within a biological specimen of given shape subject to rapid freezing. The model is applicable to the slamming, plunging or spraying methods of cryofixation provided the ice crystal size ...
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