| Solid-liquid phase behavior of binary fatty acid mixtures. 2. Mixtures of oleic acid with lauric acid, myristic acid, and palmitic acid. | |
| | |
MedLine Citation:
|
PMID: 14725999 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
|
Solid-liquid phase behavior was investigated for binary fatty acid mixtures composed of oleic acid (OA; cis-9-octadecenoic acid) and saturated fatty acids, lauric acid (LA; dodecanoic acid), myristic acid (MA; tetradecanoic acid), and palmitic acid (PA; hexadecanoic acid), by means of differential scanning calorimetry (DSC) and Fourier transform infrared spectroscopy (FT-IR). When the mixture was heated immediately after the solidification from the melt, the heat effect due to the gamma-to-alpha transformation of OA varied depending on the composition of the mixture. However, the mixture subjected to an annealing at the temperature slightly below the melting temperature provided the transformation at constant temperature which corresponds to the gamma-to-alpha transformation temperature of pure OA. This suggests that a solid phase formed by cooling of the melt of the mixture is not in an equilibrium state, but it relaxes to a stable solid during the annealing process. The T-X phase diagrams of these mixtures constructed from the DSC measurements demonstrate that the two fatty acid species are completely immiscible in a solid phase regardless of the type of polymorphs of OA, alpha- or gamma-form. According to a thermodynamic analysis of liquidus line basing on the regular solution model for the melt, the non-ideality of mixing tends to increase with the decrease in the acyl chain length of the saturated fatty acid, although the mixing is rather close to ideal. |
| | |
Authors:
|
Tohru Inoue; Yusuke Hisatsugu; Ruri Ishikawa; Masao Suzuki |
Related Documents
:
|
21128289 - Fatty acids and the endoplasmic reticulum in nonalcoholic fatty liver disease. 6778399 - Drug interference on some biochemical parameters of rat cerebral cortex during post-isc... 17014159 - Second-order overtone and combination modes in the lola region of acid treated double-w... 3408819 - A rapid and sensitive method for the determination of gamma-hydroxybutyric acid and tra... 21126699 - The refluxate: the impact of its magnitude, composition and distribution. 20488039 - Carnosine, homocarnosine and anserine in vertebrate retinas. 2760019 - Amino acid sequences of ferredoxin isoproteins from radish roots. 883999 - Effect of cholesterol feeding and estrogen treatment on synthesis of fatty acids in liver. 1474499 - Identification of a new transport system (y+l) in human erythrocytes that recognizes ly... |
Publication Detail:
|
Type: Journal Article; Research Support, Non-U.S. Gov't |
Journal Detail:
|
Title: Chemistry and physics of lipids Volume: 127 ISSN: 0009-3084 ISO Abbreviation: Chem. Phys. Lipids Publication Date: 2004 Feb |
Date Detail:
|
Created Date: 2004-01-16 Completed Date: 2005-02-24 Revised Date: 2006-11-15 |
Medline Journal Info:
|
Nlm Unique ID: 0067206 Medline TA: Chem Phys Lipids Country: Ireland |
Other Details:
|
Languages: eng Pagination: 161-73 Citation Subset: IM |
Affiliation:
|
Department of Chemistry, Faculty of Science, Fukuoka University, Nanakuma, Jonan-ku, Fukuoka 814-0180, Japan. inouetr@fukuoka-u.ac.jp |
Export Citation:
|
APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
|
Calorimetry, Differential Scanning Lauric Acids / chemistry* Molecular Structure Myristic Acid / chemistry* Oleic Acid / chemistry* Palmitic Acid / chemistry* Phase Transition Spectroscopy, Fourier Transform Infrared Temperature Thermodynamics |
| Chemical | |
Reg. No./Substance:
|
0/Lauric Acids; 112-80-1/Oleic Acid; 143-07-7/lauric acid; 544-63-8/Myristic Acid; 57-10-3/Palmitic Acid |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
Previous Document: The kinetics and mechanism of the formation of crystalline phase of dipalmitoylphosphatidylethanolam...
Next Document: Insights on the interaction of met-enkephalin with negatively charged membranes--an infrared and sol...