985 resultados para Temperatures
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Work performed at the Sylvania-Corning Nuclear Corporation under contract AT-30 GEN-366.
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"Prepared for Naval Facilities Engineering Command, Dept. of the Navy, Directorate of Civil Engineering, U.S. Air Force, Office of Chief of Engineers, U.S. Army and National Bureau of Standards.
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"Project no. 7360, Task no. 73603."
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"PB 161761."
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"Materials Laboratory, Contract no. AF33(616)-5428, Phase B, Project no. 7351."
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Cover title.
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Mode of access: Internet.
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"Submitted to: the U.S. Fish and Wildlife Service" -- cover
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At head of title: U.S. Department of Agriculture. Weather Bureau.
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Includes bibliographical references.
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Mode of access: Internet.
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"Mr. Burgess has rewritten anew the whole book, so that it is no longer a translation, but an original work."
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"This report was prepared by Cornell Aeronautical Laboratory, Inc., Buffalo, New York under USAF Contract no. AF-33(615)-1485."
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Banana fruit are highly susceptible to chilling injury during low temperature storage. Experiments were conducted to compare ethylene binding during storage at chilling (3 and 8 degreesC) versus optimum (13 degreesC) temperatures. The skins of fruit stored at 3 and 8 degreesC gradually darkened as storage duration increased. This chilling effect was reflected in increasing membrane permeability as shown by increased relative electrolyte leakage from skin tissue. In contrast, banana fruit stored for 8 days at 13 degreesC showed no chilling injury symptoms. Exposure of banana fruit to the ethylene binding inhibitor 1-methylcyclopropene (1 mul l(-1) 1-MCP) prevented ripening. However, this treatment also enhanced the chilling injury accelerated the occurrence of chilling injury-associated increased membrane permeability. C-14-ethylene release assay showed that ethylene binding by banana fruit stored at low temperature decreased with reduced storage temperature and/or prolonged storage time. Fruit exposed to 1-MCP for 12 h and then stored at 3 or 8 degreesC exhibited lower ethylene binding than those stored at 13 degreesC. Thus, chilling injury of banana fruit stored at low temperature is associated with a decrease in ethylene binding. The ability of tissue to respond to ethylene is evidently reduced, thereby resulting in failure to ripen.
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Experimental laboratory methods have been developed that enable phase-equilibria studies to be carried out on slags in the system Ca-Cu-Fe-O in equilibrium with metallic copper. These techniques involve equilibration at temperature, rapid quenching, and chemical analysis of the phases using electron-probe X-ray microanalysis (EPNIA). Equilibration experiments have been carried out in the temperature range of 1150 degreesC to 1250 degreesC (1423 to 1523 K) and in the composition range of 4 to 80 wt pct "Cu2O," 0 to 25 wt pct CaO, and 20 to 75 wt pct "Fe2O3" in equilibrium with metallic copper. Liquidus and solidus data are reported for the primary-phase fields of spinel (magnetite) and dicalcium ferrite. The resulting data have been used to construct liquidus isotherms of the CaO-"Cu2O"-"Fe2O3" system at metallic copper saturation.