Number Of Ester Groups Research Articles

Absorbability by Rats of Compounds Containing from One to Eight Ester Groups

The absorbability of the fatty acid moiety of the complete, oleate esters of alcohols containing from one to six hydroxyl groups was determined by the fat balance technique in adult rats. Similarly, the absorbability of sucrose octaoleate and sucrose monooleate was determined. The fatty acids of the com pounds containing less than four ester groups, methyl oleate, ethylene glycol dioleate, glycerol trioleate, and sucrose monooleate, were almost completely ab sorbed. As the number of ester groups was increased †erythritol and penta- erythritol tetraoleate and xylitol pentaoleate †the absorbability decreased. The fatty acids of sorbitol hexaoleate and sucrose octaoleate were not absorbed. These differences in absorbability are related to the activity and specificity of the lipo- lytic enzymes in the lumen of the intestinal tract. J. Nutr. 102: 1171-1176,

X-ray structural study of the polyester of eicosanediol and decamethylenedicarboxylic acid

The basic motif of the structure of “polythene” type is retained after the introduction of a small number of ester groups into it. The molecular chains are rotated in this case about the c0 axis, allowing for a sufficiently good packing of the atoms of oxygen in the C=O groups. An allowance for the hydrogen atoms was shown to be necessary for the calculation of values of intensities of x-ray diffraction in structures of this type.