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DC Field | Value | Language |
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dc.contributor.author | Feitosa, E. | - |
dc.contributor.author | Barreleiro, PCA | - |
dc.contributor.author | Olofsson, G. | - |
dc.date.accessioned | 2014-05-20T14:02:21Z | - |
dc.date.accessioned | 2016-10-25T17:09:03Z | - |
dc.date.available | 2014-05-20T14:02:21Z | - |
dc.date.available | 2016-10-25T17:09:03Z | - |
dc.date.issued | 2000-04-01 | - |
dc.identifier | http://dx.doi.org/10.1016/S0009-3084(00)00127-4 | - |
dc.identifier.citation | Chemistry and Physics of Lipids. Clare: Elsevier Sci Ireland Ltd, v. 105, n. 2, p. 201-213, 2000. | - |
dc.identifier.issn | 0009-3084 | - |
dc.identifier.uri | http://hdl.handle.net/11449/21977 | - |
dc.identifier.uri | http://acervodigital.unesp.br/handle/11449/21977 | - |
dc.description.abstract | The gel to liquid crystalline phase transition of the double-chained cationic dioctadecyldimethylammonium chloride and bromide (DODAX, X = Cl- or Br-) in aqueous vesicle dispersions prepared by non-sonication, sonication and extrusion has been investigated using high-sensitivity differential scanning calorimetry (DSC). The transition temperature (T-m) is a function of the preparation method, amphiphile concentration, vesicle curvature and nature of the counterion. DSC thermograms for DODAB and DODAC non-sonicated vesicle dispersions exhibit a single endothermic peak at T-m roughly independent of concentration up to 10 mM. Extrusion broadens the transition peak and shifts T-m downwards. Sonication, however, broadens slightly the transition peak and tends to shift T-m upwards suggesting that extrusion and sonication form vesicles with different characteristics. DODAC always exhibits higher T-m than DODAB irrespective of the preparation method. T-m changes as follows: T-m (sonicated) greater than or equal to T-m (non-sonicated) > T-m (extruded). Hysteresis of about 7 degrees C was observed for DODAB vesicle dispersions. (C) 2000 Elsevier B.V. Ireland Ltd. All rights reserved. | en |
dc.format.extent | 201-213 | - |
dc.language.iso | eng | - |
dc.publisher | Elsevier B.V. | - |
dc.source | Web of Science | - |
dc.subject | differential scanning calorimetry | pt |
dc.subject | transition temperature | pt |
dc.subject | sonicated vesicles | pt |
dc.subject | non-sonicated vesicles | pt |
dc.subject | extruded vesicles | pt |
dc.title | Phase transition in dioctadecyldimethylammonium bromide and chloride vesicles prepared by different methods | en |
dc.type | outro | - |
dc.contributor.institution | Universidade Estadual Paulista (UNESP) | - |
dc.contributor.institution | Univ Lund | - |
dc.description.affiliation | UNESP, IBILCE, Dept Phys, BR-15054000 Sao Jose Rio Preto, SP, Brazil | - |
dc.description.affiliation | Univ Lund, Ctr Chem & Chem Engn, S-22100 Lund, Sweden | - |
dc.description.affiliationUnesp | UNESP, IBILCE, Dept Phys, BR-15054000 Sao Jose Rio Preto, SP, Brazil | - |
dc.identifier.doi | 10.1016/S0009-3084(00)00127-4 | - |
dc.identifier.wos | WOS:000086633900010 | - |
dc.rights.accessRights | Acesso restrito | - |
dc.relation.ispartof | Chemistry and Physics of Lipids | - |
Appears in Collections: | Artigos, TCCs, Teses e Dissertações da Unesp |
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