Sucrose structure relationship

The activity of starch-UDPglucosyl transferase in potato tubers is high, and fractionation of the subcellular particles in sucrose-citrate media has given a starch-granule fraction showing 400-2000 times the activity of the above bean preparation. The presence of an enzyme which is active only when bound to starch granules (where the structural relationship between enzyme and substrate is similar to that in plant cells) is suggestive of an in vivo function. 

STRUCTURAL RELATIONSHIP OF SEVERAL TRI>, TETRA-, AND PENTA-OLICOSACCHARIDES TO SUCROSE... 

Besides these normal technical products, many other different types of a-sulfo fatty acid esters have been described in the literature. For example, Weil et al. prepared a-sulfopalmitates and stearates with higher alcohols [19] and also monoesters of polyhydric alcohol [39] and of hexitols and sucrose [40] for their special properties. In addition to the sodium salt, Stirton et al. used other cations, such as Li, NH4, K, Mg, and Ca, to study the relationship between the structure and the surfactant properties [30]. 

The relationship between structure and enhancement of sweetness in chlorodeoxysucroses was studied by Hough and Khan. Examination of a range of mono-, di-, tri-, and tetra-chlorodeoxy derivatives of sucrose and galacto-sucTOse suggested that C-4, C-1, and C-6 appear to be important in the enhancement of sweetness when substituted with chloro substituents. The increase in sweetness is substantial if a combination of two of these hydroxyl groups is replaced for example, the 4,l -dichloride (55) and the r,6 -dichloride (56) were reported to be respectively 120 and 76 times... 

A simple relationship was not found between shrinkage and glass - rubber transitions of both peach and apricot tissue (Campolongo, 2002 Riva et al., 2001, 2002). Even when sorbitol use increased AT (= T — 7g ) values, both the color and the structure showed the highest stability. The fact that sorbitol performed better than sucrose indicates that the chemical nature of the infused solute is more important than its glass transition temperature in preventing structural collapse, in accordance with the results reported by del Valle et al. (1998). 

---