A molecular thermodynamic model for potentiometric titration of poly-L-glutamic acid

Luigi Marrelli, Marco Maschietti

Publikation: Bidrag til bog/antologi/rapport/konference proceedingKonferenceartikel i proceedingForskning

Abstract

In this work, experimental titration curves of poly-L-giutamic acid are reported at two ionic strengths (0.1 and
0.5 M NaCI) at 25°C. A simple extension of the counterion condensation theory is proposed in order to
account for the pH-induced conformational transition. The model assumes a variable distance between titrable
sites in the charge induced transition from o-helix to extended coil structure. Calculations are in good
agreement with experimental results and show the right change of concavity in titration curves with respect to
models that assume constant distance between titrable sites.
OriginalsprogEngelsk
TitelAtti del Convegno GRICU 2004 (Nuove Frontiere di Applicazione delle Metodologie dell’Ingegneria Chimica) - Proceedings of the congress GRICU 2004 - Porto d'Ischia (Naples, Italy)
Vol/bind1
Publikationsdatosep. 2004
Sider373-376
ISBN (Trykt)88 87030 80 4
StatusUdgivet - sep. 2004
Udgivet eksterntJa
BegivenhedConvegno GRICU 2004 - Porto d'Ischia, Italien
Varighed: 12 sep. 200415 sep. 2004

Konference

KonferenceConvegno GRICU 2004
Land/OmrådeItalien
ByPorto d'Ischia
Periode12/09/200415/09/2004

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