By Louis B. Rockland, George F. Stewart
ISBN-10: 0125913508
ISBN-13: 9780125913508
Water task: impacts on nutrition caliber is a suite of papers provided on the 1978 foreign Symposium via an identical name, held in Osaka, Japan. This booklet is a treatise at the impact of sure and loose water at the caliber and balance of meals and different traditional products.
This publication is equipped into seven sections encompassing 33 chapters. the 1st sections care for the characterization of moisture sorption isotherms according to either theoretical and utilized concerns, in addition to the connection of certain water to the actual and chemical homes of traditional items, together with meals. The succeeding sections think of the constitution of water and the impact of solutes and solute mobility on water task and the impact of water and water task at the structural and sensible features of proteins, carbohydrates, and proteins.
Other sections discover the impact of water task and temperature at the premiums of numerous vital chemical reactions, equivalent to lipid oxidation, nutrition decomposition, browning, and different reactions, which impact the chemical, actual, and dietary homes of nutrition. those sections additionally speak about the impact of water task on foodstuff processing and garage practices from either theoretical and utilized viewpoints, in particular the applying of water job principals to the processing and protection of leafy greens, cheese, dried fish, and different items. the ultimate part is dedicated to the affects of water job at the habit of food-related microorganisms. This part emphasizes the position of solvents in controlling water task and the comparable survival of sure microorganisms.
This e-book will end up valuable to nutrition scientists and researchers.
Read Online or Download Water Activity: Influences on Food Quality. A Treatise on the Influence of Bound and Free Water on the Quality and Stability of Foods and Other Natural Products PDF
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Additional resources for Water Activity: Influences on Food Quality. A Treatise on the Influence of Bound and Free Water on the Quality and Stability of Foods and Other Natural Products
Sample text
Lyklema (Dept. of Physical Chemistry, Agricultural University, Wageningen, Netherlands) for their very useful comments. Mr. H. Bizot (Institut Nationale de la Recherche Agronomique, Nantes, France) was so kind as to draw the first author's attention to the isotherm equation of Troesch (A15). C. VAN DEN BERG AND S. BRUIN 44 APPENDIX TABLE II. of Biological a w W Equations Materials water for Fitting Water Vapor Sorption activity mass fraction of water on dry basis W mass fraction of water on total W mass fraction of water on dry basis sorption T sites temperature with (unit depending Localized Al.
And Leniger, 1976). 1975; Van den Berg Anderson's equation was put on a firm theo retical basis by Guggenheim (1966). , It is interesting to note that 1969) considered the Anderson-Gug genheim equation (AIO) to be an important improvement of the BET equation (A7). Polarized layer model equations, especially Bradley's version, gained importance in cases where sorbed water molecules are as sumed to structure themselves in several subsequent layers on the sorbent surface. , Kuntz and Kauzmann, 1974) and polyvinylpyrrolidone (McKenzie and Rasmussen, 1972).
41 (1978) evaluated the usefulness of eight two-parameter isotherm equations [ in Appendix I equations (Al7), (A21), (A22), (A52), (A69), (A73), (Α74)] in describing moisture sorption isotherms of 39 foods of different nature. It was found that among these eight equations the most versatile are those of Frenkel-Halsey-Hill (A21) and Oswin (A69). More systematic work in this area remains to be done. V. SPECIAL METHODS For the calculation of the final a of a mixture of components each with a different a and a known sorption isotherm, Salwin and w Slawson (1959) developed a simple approximation method.
Water Activity: Influences on Food Quality. A Treatise on the Influence of Bound and Free Water on the Quality and Stability of Foods and Other Natural Products by Louis B. Rockland, George F. Stewart
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