ISSN:
1750-3841
Source:
Blackwell Publishing Journal Backfiles 1879-2005
Topics:
Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
,
Process Engineering, Biotechnology, Nutrition Technology
Notes:
Binding between lactose and metal salts was investigated. When lactose combines with a salt in aqueous solution, a complex is formed with a specific rotation different from that of pure lactose. Lactose combined with the metal salts in a ratio of one to one for all the cations studied (Ca++, Ba++, Sr++, Fe++, Mg++, Mn++, Zn++, Na+ and Li+) except for K+ and NH+4 where there is no apparent binding. The specific rotation of complexes was determined by saturating a lactose solution with salts until 100% of complex was formed, then the amount of complex in various mixtures was calculated from the observed rotation. Equilibrium constants were found to be 0.205 for lactose with Ca++, 0.379 for lactose with Li+, and 0.527 for lactose with Na+. Variation in pH from 2.0–6.5 had no effect on the amount of complex formed. Complex formation decreased with increased ionic strength.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1111/j.1365-2621.1978.tb09743.x
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