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| Content Provider | Springer Nature Link |
|---|---|
| Author | Craven, R. John Lencki, Robert W. |
| Copyright Year | 2011 |
| Abstract | Crystallization and melting behavior, small-angle X-ray scattering, X-ray powder diffraction and infra-red absorbance were measured for nine 1,3-acyl-palmitoyl-rac-glycerols (1,3-acetoyl-, -butyroyl-, -hexanoyl-, -octanoyl-, -decanoyl-, -lauroyl, -myristoyl- and -oleoyl-palmitoyl-rac-glycerol and 1,3-dipalmitoyl-glycerol). All but one of the prepared 1,3-diacylglycerols (1,3-DAG) were β-stable with 1,3-acetoyl-palmitoyl-rac-glycerol being the exception (β′-stable). Small-angle X-ray scattering indicates that molecules in β-tending diacid 1,3-DAG adopt a herringbone-type configuration similar to monoacid 1,3-DAG. In this configuration acyl chains of the same length associate and regular chain-end matching between terminal methyl groups delineate lamellae. In contrast, molecules in crystalline 1,3-acetoyl-palmitoyl-rac-glycerol are oriented similar to those of 1(3)-monoacylglycerol. Interestingly, DSC curves indicate five of the nine diacid compounds have meta-stable forms—suggesting these forms are quite common for diacid 1,3-DAG. Meta-stable forms are observed in the melting curve when the difference in length between acyl chains is large (1,3-acetoyl-, -butyroyl- and -hexanoyl-palmitoyl-rac-glycerol), and in the crystallization curve when the difference is moderate (1,3-decanoyl- and -lauroyl-palmitoyl-rac-glycerol). |
| Starting Page | 1113 |
| Ending Page | 1123 |
| Page Count | 11 |
| File Format | |
| ISSN | 0003021X |
| Journal | Journal of the American Oil Chemists' Society |
| Volume Number | 88 |
| Issue Number | 8 |
| e-ISSN | 15589331 |
| Language | English |
| Publisher | Springer-Verlag |
| Publisher Date | 2011-02-18 |
| Publisher Place | Berlin, Heidelberg |
| Access Restriction | One Nation One Subscription (ONOS) |
| Subject Keyword | 1,3-Diacylglycerol Physical chemistry X-ray powder diffraction Small-angle X-ray scattering Infra-red spectroscopy Polymorphism Biotechnology Agriculture Biomaterials Industrial Chemistry/Chemical Engineering Food Science |
| Content Type | Text |
| Resource Type | Article |
| Subject | Organic Chemistry Chemical Engineering |
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