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231223s2005 xx ||||| 00| ||eng c |
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|e rakwb
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|a eng
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| 100 |
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|a Tamashiro, M N
|e verfasserin
|4 aut
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|a Aqueous suspensions of charged spherical colloids
|b dependence of the surface charge on ionic strength, acidity, and colloid concentration
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|c 2005
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|a Text
|b txt
|2 rdacontent
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|a ohne Hilfsmittel zu benutzen
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|2 rdamedia
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|b nc
|2 rdacarrier
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|a Date Completed 05.04.2007
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|a Date Revised 15.11.2005
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|a published: Print
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|a Citation Status PubMed-not-MEDLINE
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|a We theoretically investigate the dependence of the surface charge developed on charged spherical colloids upon several environmental parameters: the ionic strength of the monovalent added electrolyte, acidity (stabilized by a pH buffer solution), and colloid concentration. In the framework of the mean-field Poisson-Boltzmann spherical cell model, we include the charged colloid-microion correlations into the buffer equation, and we allow for the specific binding of ions to the ionizable groups on the colloid surface. Theoretical predictions are compared to the results obtained under the planar-symmetry Gouy-Chapman approximation and analyzed for the experimental conditions of an aqueous dispersion of the phospholipid dimyristoyl phosphatidylglycerol (DMPG). Experimental measurements of the partition ratio of an aqueous soluble cationic spin label on buffered dispersions of polyanionic unilamellar vesicles of DMPG in the presence of added monovalent salt are theoretically interpreted in terms of ion partition due to electrostatic interactions. We show that the specific binding of the probe must be admitted to explain the experimental results
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|a Journal Article
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|a Henriques, V B
|e verfasserin
|4 aut
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|a Lamy, M T
|e verfasserin
|4 aut
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|i Enthalten in
|t Langmuir : the ACS journal of surfaces and colloids
|d 1992
|g 21(2005), 24 vom: 22. Nov., Seite 11005-16
|w (DE-627)NLM098181009
|x 1520-5827
|7 nnns
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| 773 |
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|g volume:21
|g year:2005
|g number:24
|g day:22
|g month:11
|g pages:11005-16
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