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231224s2012 xx |||||o 00| ||eng c |
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|a 10.1021/la2043735
|2 doi
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|a pubmed24n0713.xml
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|a (DE-627)NLM213922150
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|a (NLM)22176674
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|a DE-627
|b ger
|c DE-627
|e rakwb
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|a eng
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| 100 |
1 |
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|a Priebe, Jacks P
|e verfasserin
|4 aut
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| 245 |
1 |
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|a The chameleon-like nature of zwitterionic micelles
|b effect of cation binding
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| 264 |
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|c 2012
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| 336 |
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|a Text
|b txt
|2 rdacontent
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|a ƒaComputermedien
|b c
|2 rdamedia
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|a ƒa Online-Ressource
|b cr
|2 rdacarrier
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| 500 |
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|a Date Completed 09.07.2012
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|a Date Revised 24.01.2012
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|a published: Print-Electronic
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|a Citation Status PubMed-not-MEDLINE
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|a Addition of salts, especially perchlorates, to zwitterionic micelles of SB3-14, C(14)H(29)NMe(2)(+)(CH(2))(3)SO(3)(-), induces anionic character and uptake of H(3)O(+) by SB3-14 micelles. Thus, the addition of alkali metal perchlorates accelerates the acid hydrolysis of 2-(p-heptoxyphenyl)-1,3-dioxolane, HPD, in the presence of SB3-14 micelles, which depends on the local proton concentration at the micelle surface. The addition of metal chlorides to solutions of such perchlorate-modified SB3-14 micelles decreases both the negative zeta potential of the micelles and the observed rate constant for acid hydrolysis of HPD. The effect of the monovalent cations Li(+), Na(+), and K(+) is smaller than that of the divalent cations Be(2+), Mg(2+), and Ca(2+), and much smaller than that of the trivalent cations Al(3+), La(3+), and Er(3+). The major factor responsible for this cation valence dependence of these effects is shown to be electrostatic in nature, reflecting the strong dependence of the micellar surface potential on the cation valence. The fact that the salt effects are not identical after correction for the electrostatic effects indicates that additional secondary nonelectrostatic effects may contribute as well
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|a Journal Article
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1 |
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|a Souza, Franciane D
|e verfasserin
|4 aut
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|a Silva, Marcelo
|e verfasserin
|4 aut
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|a Tondo, Daniel W
|e verfasserin
|4 aut
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|a Priebe, Jonas M
|e verfasserin
|4 aut
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|a Micke, Gustavo A
|e verfasserin
|4 aut
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|a Costa, Ana C O
|e verfasserin
|4 aut
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|a Bunton, Clifford A
|e verfasserin
|4 aut
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|a Quina, Frank H
|e verfasserin
|4 aut
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| 700 |
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|a Fiedler, Haidi D
|e verfasserin
|4 aut
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| 700 |
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|a Nome, Faruk
|e verfasserin
|4 aut
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| 773 |
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|i Enthalten in
|t Langmuir : the ACS journal of surfaces and colloids
|d 1992
|g 28(2012), 3 vom: 24. Jan., Seite 1758-64
|w (DE-627)NLM098181009
|x 1520-5827
|7 nnns
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| 773 |
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|g volume:28
|g year:2012
|g number:3
|g day:24
|g month:01
|g pages:1758-64
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|u http://dx.doi.org/10.1021/la2043735
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