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Extraction of melaleuca cajuputi using supercritical fluid extraction and solvent extraction / S.M. Jajaei in The journal of essential oil research, Vol. 22 N° 3 (Mai/Juin 2010) 

Public ISBD [article]  in The journal of essential oil research > Vol. 22 N° 3 (Mai/Juin 2010) . - pp. 205 - 210 Titre : Extraction of melaleuca cajuputi using supercritical fluid extraction and solvent extraction Type de document : texte imprimé Auteurs : S.M. Jajaei, Auteur ; W.R.W. Daud, Auteur ; M. Markom, Auteur Année de publication : 2010 Article en page(s) : pp. 205 - 210 Note générale : Génie Chimique Langues : Anglais (eng) Mots-clés : Melaleuca  cajuputi  Myrtaceae  Cajuput  Supercritical  fluid  CO2  extract  composition  Extract  composition Index. décimale : 646 Résumé : Extracts of Melaleuca cajuputi were obtained by supercritical (carbon dioxide) extraction and solvent (hexane) extraction methods. This work is aimed at adapting the green technology of using supercritical CO2 (SC-CO2) as solvent in a batch process to extract Melaleuca cajuputi leaves. The plant leaves were collected from Trengganu, Malaysia. Cajuputi extract analyses were performed by GC and GC/MS. The maximum yields obtained were 4.2% and 6.0%, respectively, by supercritical fluid (SFE) and solvent extraction (SE). Several compounds were identified and significant qualitative and quantitative differences were observed under different conditions. The major components of Cajuputi oil consisted of sesquiterpenes (d-elemene, b-elemene, b-caryophyllene, a-humulene, 9-epi-b-caryophyllene), their oxygenated derivatives (viridiflorol, platyphyllol, b-eudesmol, bulnesol, (Z,Z)-farnesol and (E,E)-farnesal) and polyphenolic ketones (isoeugenitine and three unknown compounds). DEWEY : 665 ISSN : 1041-2905 En ligne : http://www.jeoronline.com/archive/detail/51 [article] Extraction of melaleuca cajuputi using supercritical fluid extraction and solvent extraction [texte imprimé] / S.M. Jajaei, Auteur ; W.R.W. Daud, Auteur ; M. Markom, Auteur . - 2010 . - pp. 205 - 210. Génie Chimique Langues : Anglais (eng) in The journal of essential oil research > Vol. 22 N° 3 (Mai/Juin 2010) . - pp. 205 - 210 Mots-clés : Melaleuca  cajuputi  Myrtaceae  Cajuput  Supercritical  fluid  CO2  extract  composition  Extract  composition Index. décimale : 646 Résumé : Extracts of Melaleuca cajuputi were obtained by supercritical (carbon dioxide) extraction and solvent (hexane) extraction methods. This work is aimed at adapting the green technology of using supercritical CO2 (SC-CO2) as solvent in a batch process to extract Melaleuca cajuputi leaves. The plant leaves were collected from Trengganu, Malaysia. Cajuputi extract analyses were performed by GC and GC/MS. The maximum yields obtained were 4.2% and 6.0%, respectively, by supercritical fluid (SFE) and solvent extraction (SE). Several compounds were identified and significant qualitative and quantitative differences were observed under different conditions. The major components of Cajuputi oil consisted of sesquiterpenes (d-elemene, b-elemene, b-caryophyllene, a-humulene, 9-epi-b-caryophyllene), their oxygenated derivatives (viridiflorol, platyphyllol, b-eudesmol, bulnesol, (Z,Z)-farnesol and (E,E)-farnesal) and polyphenolic ketones (isoeugenitine and three unknown compounds). DEWEY : 665 ISSN : 1041-2905 En ligne : http://www.jeoronline.com/archive/detail/51

Influence of triglycerides on fouling of glycerol–water with ultrafiltration membranes / M. A. Indok Nurul Hasyimah in Industrial & engineering chemistry research, Vol. 50 N° 12 (Juin 2011) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 50 N° 12 (Juin 2011) . - pp. 7520-7526 Titre : Influence of triglycerides on fouling of glycerol–water with ultrafiltration membranes Type de document : texte imprimé Auteurs : M. A. Indok Nurul Hasyimah, Auteur ; A.W. Mohammad, Auteur ; M. Markom, Auteur Année de publication : 2011 Article en page(s) : pp. 7520-7526 Note générale : Chimie industrielle Langues : Anglais (eng) Mots-clés : Membrane  separation  Ultrafiltration  Fouling Résumé : In the present study, the ability of two ultrafiltration (UF) polymeric membranes to clarify synthetic glycerin-rich solutions containing triglycerides (TGs) was evaluated. The membranes were made of poly(ether sulfone) (PES) and poly-(vinylidene fluoride) (PVDF) and had molecular-weight cutoff (MWCO) values of 25000 and 30000 Da, respectively. A commercial TG (RBD Palm Olein) was employed, and the effects of membrane surface chemistry and solution pH on the permeation flux and TG retention rate were studied. In glycerol-water mixtures containing TG, the contribution of the solute to fouling was more severe than that of fatty acid (FA), with lower permeation rates being shown. Furthermore, the present study revealed that the nature of the membrane and the pH of the solution have significant effects on the fouling potential and can be used to quantitatively determine the TG rejection rate. Moreover, PVDF membranes were found to provide higher fluxes and lower TG rejection rates (81%) than PES membranes (91%). DEWEY : 660 ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=24239068 [article] Influence of triglycerides on fouling of glycerol–water with ultrafiltration membranes [texte imprimé] / M. A. Indok Nurul Hasyimah, Auteur ; A.W. Mohammad, Auteur ; M. Markom, Auteur . - 2011 . - pp. 7520-7526. Chimie industrielle Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 50 N° 12 (Juin 2011) . - pp. 7520-7526 Mots-clés : Membrane  separation  Ultrafiltration  Fouling Résumé : In the present study, the ability of two ultrafiltration (UF) polymeric membranes to clarify synthetic glycerin-rich solutions containing triglycerides (TGs) was evaluated. The membranes were made of poly(ether sulfone) (PES) and poly-(vinylidene fluoride) (PVDF) and had molecular-weight cutoff (MWCO) values of 25000 and 30000 Da, respectively. A commercial TG (RBD Palm Olein) was employed, and the effects of membrane surface chemistry and solution pH on the permeation flux and TG retention rate were studied. In glycerol-water mixtures containing TG, the contribution of the solute to fouling was more severe than that of fatty acid (FA), with lower permeation rates being shown. Furthermore, the present study revealed that the nature of the membrane and the pH of the solution have significant effects on the fouling potential and can be used to quantitatively determine the TG rejection rate. Moreover, PVDF membranes were found to provide higher fluxes and lower TG rejection rates (81%) than PES membranes (91%). DEWEY : 660 ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=24239068