ShareWATER ACTIVITY CHANGE IN AQUEOUS SOLUTIONS AT SUBFREEZING TEMPERATURES.
Author(s) : CHEN C. S.
Type of article: Article
Summary
THE PHENOMENON OF REDUCED VAPOUR PRESSURES OF ICE AND SUPERCOOLED WATER WAS ANALYZED BY THE PRINCIPLES OF ANALOGY. OBSERVATIONS ON WATER ACTIVITY CHANGE AT TEMPERATURES 273 TO 223 K (0 TO -50 DEG C) CAN BE DESCRIBED BY THE EXPONENTIAL LAW OF DECAY. THE RATE OF WATER ACTIVITY CHANGE WITH RESPECT TO TEMPERATURE LOWERING IS 0.0097 K. THIS RATE CONSTANT IS APPLICABLE TO FREEZING OF AQUEOUS SOLUTIONS WHICH INCLUDE NON-ELECTROLYTES, ACIDS, BASES, AND SALTS. A THREE-DIMENSIONAL ACTIVITY-CONCENTRATION-TEMPERATURE DIAGRAM IS DEVELOPED.
Details
- Original title: WATER ACTIVITY CHANGE IN AQUEOUS SOLUTIONS AT SUBFREEZING TEMPERATURES.
- Record ID : 1989-1367
- Languages: English
- Source: Lebensm.-Wiss. Technol. - vol. 21 - n. 5
- Publication date: 1988
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Indexing
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Themes:
Food engineering;
Freezing of foodstuffs - Keywords: Ice; Calculation; Solution; Freezing; Water activity
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- Languages : English
- Source: TRRF, Inf. Bull. - n. 10
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- Date : 1994/10
- Languages : French
- Source: Ind. aliment. agric. - vol. 111 - n. 10
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- Author(s) : KITIC D., RESNIK S. L., CHIRIFE J.
- Date : 1986
- Languages : English
- Source: Lebensm.-Wiss. Technol. - vol. 19 - n. 3
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