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Please use this identifier to cite or link to this item: http://acervodigital.unesp.br/handle/11449/116371
Title: 
Reversibility of Thermal Transitions in Dilute Dioctadecyl-Dimethyl-Ammonium Bromide Vesicles
Author(s): 
Institution: 
Universidade Estadual Paulista (UNESP)
ISSN: 
1097-3958
Abstract: 
Dioctadecyl-dimethyl-ammonium bromide (DODAB) vesicles can be characterized by their differential scanning calorimetry (DSC) thermograms comprised of two endotherms at T (s) a parts per thousand 36 A degrees C and T (m) a parts per thousand 45 A degrees C in the heating, ascribed respectively to the subgel-to-gel and gel-to-liquid crystalline transitions, and two exotherms at T'(m) a parts per thousand 40 A degrees C and T'(s) a parts per thousand 16 A degrees C in the cooling, ascribed respectively to the liquid crystalline-to-gel and gel-to-subgel transitions. It has been reported but not proved that the T (m)-transitions, the T'(m)-transitions, the T (s)-transitions, and the T'(s)-transitions are reverse to each other, displaying hystheresis Delta T (m) a parts per thousand 5 A degrees C and Delta T (s) a parts per thousand 20-25 A degrees C, respectively. By investigating the effects of the initial scanning temperature (T (i)) on the transition enthalpies (Delta H (m), Delta H (s), Delta H'(m) and Delta H'(s)), we have seen that these transitions are the reverse to each other and display different kinetics.
Issue Date: 
1-Sep-2014
Citation: 
Journal Of Surfactants And Detergents. Heidelberg: Springer Heidelberg, v. 17, n. 5, p. 1055-1058, 2014.
Time Duration: 
1055-1058
Publisher: 
Springer
Keywords: 
  • Dioctadecyl-dimethyl-ammonium bromide
  • Cationic lipid
  • Differential scanning calorimetry
  • Synthetic vesicles
  • Thermal behavior
Source: 
http://dx.doi.org/10.1007/s11743-014-1581-6
URI: 
Access Rights: 
Acesso restrito
Type: 
outro
Source:
http://repositorio.unesp.br/handle/11449/116371
Appears in Collections:Artigos, TCCs, Teses e Dissertações da Unesp

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