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Titolo:
Polymorphism of linoleic acid (cis-9, cis-12-Octadecadienoic acid) and alpha-linolenic acid (cis-9, cis-12, cis-15-Octadecatrienoic acid)
Autore:
Ueno, S; Miyazaki, A; Yano, J; Furukawa, Y; Suzuki, M; Sato, K;
Indirizzi:
Hiroshima Univ, Fac Appl Biol Sci, Higashihiroshima 7398528, Japan Hiroshima Univ Higashihiroshima Japan 7398528 hihiroshima 7398528, Japan Hokkaido Univ, Inst Low Temp Sci, Sapporo, Hokkaido 0600819, Japan Hokkaido Univ Sapporo Hokkaido Japan 0600819 oro, Hokkaido 0600819, Japan Kyushu Univ, Adv Sci & Technol Ctr Cooperat Res, Kasuga, Fukuoka 8168580, Japan Kyushu Univ Kasuga Fukuoka Japan 8168580 , Kasuga, Fukuoka 8168580, Japan
Titolo Testata:
CHEMISTRY AND PHYSICS OF LIPIDS
fascicolo: 2, volume: 107, anno: 2000,
pagine: 169 - 178
SICI:
0009-3084(200010)107:2<169:POLA(C>2.0.ZU;2-R
Fonte:
ISI
Lingua:
ENG
Soggetto:
ACYL CHAIN UNSATURATION; STATE PHASE-TRANSITIONS; OLEIC-ACID; ERUCIC-ACID; PETROSELINIC ACID; BINARY-MIXTURES; ASCLEPIC ACID; PALMITOLEIC ACID; CIS-9-HEXADECENOIC ACID; MODEL DIACYLGLYCEROLS;
Keywords:
linoleic acid; alpha-linolenic acid; polymorphism; crystallization; solubility; crystal habit;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Life Sciences
Citazioni:
37
Recensione:
Indirizzi per estratti:
Indirizzo: Ueno, S Hiroshima Univ, Fac Appl Biol Sci, 1-4-4 Kagamiyama, Higashihiroshima 7398528, Japan Hiroshima Univ 1-4-4 Kagamiyama Higashihiroshima Japan 7398528 an
Citazione:
S. Ueno et al., "Polymorphism of linoleic acid (cis-9, cis-12-Octadecadienoic acid) and alpha-linolenic acid (cis-9, cis-12, cis-15-Octadecatrienoic acid)", CHEM PHYS L, 107(2), 2000, pp. 169-178

Abstract

Crystallization and polymorphic properties of linoleic acid (cis-9, cis-12-Octadecadienoic acid) (LA) and alpha -linolenic acid (cis-9, cis-12, cis-15-Octadecatrienoic acid) (alpha -LNA) have been studied by optical microscopy, differential scanning calorimetry (DSC) and X-ray diffraction (XRD). The DSC analyses presented three polymorphs in LA, and two polymorphs in alpha -LNA. The XRD patterns of the higher- and lower-temperature forms in LA and alpha -LNA showed orthorhombic O'(parallel to) + O-like and O'(parallel to) subcell, which were similar to those of alpha- and gamma -forms of mono-unsaturated fatty acids, respectively. From the solvent crystallization ofLA and alpha -LNA in acetonitrile, single crystals of the higher temperature polymorphs have been obtained. The crystal habits of truncated rhombic shape were also similar to those of alpha -forms of the mono-unsaturated fatty acids. The enthalpy and entropy values of fusion and dissolution of the alpha -forms of LA, alpha -LNA and oleic acid showed that the two values decreased with increasing number of the cis-double bond. (C) 2000 Elsevier Science Ireland Ltd. All rights reserved.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 09/04/20 alle ore 07:45:46