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DC Field | Value | Language |
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dc.contributor.author | Feitosa, E. | - |
dc.contributor.author | Jansson, J. | - |
dc.contributor.author | Lindman, B. | - |
dc.date.accessioned | 2014-05-20T14:02:24Z | - |
dc.date.accessioned | 2016-10-25T17:09:06Z | - |
dc.date.available | 2014-05-20T14:02:24Z | - |
dc.date.available | 2016-10-25T17:09:06Z | - |
dc.date.issued | 2006-07-01 | - |
dc.identifier | http://dx.doi.org/10.1016/j.chemphyslip.2006.02.001 | - |
dc.identifier.citation | Chemistry and Physics of Lipids. Clare: Elsevier B.V., v. 142, n. 1-2, p. 128-132, 2006. | - |
dc.identifier.issn | 0009-3084 | - |
dc.identifier.uri | http://hdl.handle.net/11449/22003 | - |
dc.identifier.uri | http://acervodigital.unesp.br/handle/11449/22003 | - |
dc.description.abstract | Differential scanning calorimetry (DSc) and dynamic light scattering (DLS) were used to obtain the gel to liquid-crystalline phase transition temperature (T-m) and the apparent hydrodynamic radius (R-h) of spontaneously formed cationic vesicles of dialkyldimethylammonium bromide salts (CnH2n+1)(2)(CH3)(2)N+center dot Br-, with varying chain lengths. The preparation of cationic vesicles from aqueous solution of these surfactants, for n = 12, 14, 16 and 18 (DDAB, DTDAB, DHDAB and DODAB, respectively), requires the knowledge of the surfactant gel to liquid-crystalline phase transition temperature, or melting temperature (T-m) since below this temperature these surfactants are poorly or not soluble in water. That series of cationic surfactants has been widely investigated as vesicle-forming surfactants, although C-12 and C-18, DDAB and DODAB are by far the most investigated from this series. The dependence of T-m of these surfactants on the number n of carbons in the surfactant tails is reported. The T-m obtained by DSC increases non-linearly with n, and the vesicle apparent radius R-h is about the same for DHDAB and DODAB, but much smaller for DDAB. (c) 2006 Elsevier B.V.. All rights reserved. | en |
dc.format.extent | 128-132 | - |
dc.language.iso | eng | - |
dc.publisher | Elsevier B.V. | - |
dc.source | Web of Science | - |
dc.subject | dialkyldimethylammonium salts | pt |
dc.subject | Cationic vesicle | pt |
dc.subject | cationic surfactants | pt |
dc.subject | DODAB | pt |
dc.subject | DHDAB | pt |
dc.subject | DTDAB | pt |
dc.subject | DDAB | pt |
dc.subject | phase behavior | pt |
dc.subject | differential scanning calorimetry | pt |
dc.subject | dynamic light scattering | pt |
dc.subject | melting temperature | pt |
dc.subject | hydrodynamic radius | pt |
dc.title | The effect of chain length on the melting temperature and size of dialkyldimethylammonium bromide vesicles | en |
dc.type | outro | - |
dc.contributor.institution | Universidade Estadual Paulista (UNESP) | - |
dc.contributor.institution | Lund Univ | - |
dc.description.affiliation | UNESP, IBILCE, Dept Phys, BR-15054000 Sao Jose do Rio Preto, SP, Brazil | - |
dc.description.affiliation | Lund Univ, Ctr Chem & Chem Engn, S-22100 Lund, Sweden | - |
dc.description.affiliationUnesp | UNESP, IBILCE, Dept Phys, BR-15054000 Sao Jose do Rio Preto, SP, Brazil | - |
dc.identifier.doi | 10.1016/j.chemphyslip.2006.02.001 | - |
dc.identifier.wos | WOS:000238797000013 | - |
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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