Glycol residues

The sensitivity of the NMR anisotropy to the conformation of the glycol residue, which was a complication in polyethylene terephthalate, can be turned to advantage in 4GT, as shown by some recent research 36). The anisotropy of the second moment was determined for three cases, starting with a highly oriented tape ... 

One-Stage Approach Based on a Silica Precursor with Ethylene Glycol Residues... 

Leenheer, J. A., Wershaw, R. L., Brown, P. A., and Noyes,T. I. (1991). Detection of poly (ethylene glycol) residues from nonionic surfactants in surface-water by XH and BC nuclear-magnetic-resonance spectrometry. Environ. Sci. Technol. 25,161-168. 

Throughout this section the symbol —A— is used for the non-functional monovalent or bivalent portion of a mono- or dicarboxylic acid —G— represents the bifunctional organic residue attached to the hydroxyl groups of a glycol and P— or —P— represent polymeric residues not taking part in the reaction under consideration. A and G also symbolize the acid and glycol residues within a polymer chain. 

Dioxan is believed to be formed from a terminal ester group containing a diethylene glycol residue [41], viz. 

Hydroxyethyl cellulose is not currently approved for use in food products in Europe or the USA, although it is permitted for use in indirect applications such as packaging. This restriction is due to the high levels of ethylene glycol residues that are formed during the manufacturing process. 

Rung, H.C. and Bolton, P.H. (1997) Structure of a duplex DNA containing a thymine glycol residue in solution. 

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