Abstract
The electrical conductivity of aqueous solutions of colloidal phospholipid-ganglioside mixtures has been measured in the frequency range from 10 kHz to 100 MHz, where a conductivity dispersion due to the interfacial polarization occurs. Insertion of GM1 ganglioside in the phospholipid bilayer alters markedly the electrical behaviour of the whole suspension that exhibits some interesting features, which depend on the GM1 concentration. In a restricted range of the ganglioside concentration, the experimental data can be partially explained by introducing a surface conductivity contribution in the usual conductivity theory of heterogeneous systems. Although preliminary, these measurements indicate that gangliosides, according to the structural shape they assume, modify the electrical properties of the lipid bilayer. This effect may be relevant to understanding ganglioside interactions with lipid components of biological cell membranes.
| Original language | English |
|---|---|
| Pages (from-to) | 173-176 |
| Number of pages | 4 |
| Journal | Colloids and Surfaces A: Physicochemical and Engineering Aspects |
| Volume | 72 |
| Issue number | C |
| DOIs | |
| Publication status | Published - Jun 17 1993 |
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Keywords
- Glycolipids
- radio-frequency dielectric spectroscopy
- synthetic bilayers.
ASJC Scopus subject areas
- Colloid and Surface Chemistry
- Physical and Theoretical Chemistry
Cite this
Radio-frequency dielectric spectroscopy of synthetic bilayers containing glycolipids. / Cametti, C.; De Luca, F.; Macrib, M. A.; Maraviglia, B.; Misasi, R.; Sorice, M.
In: Colloids and Surfaces A: Physicochemical and Engineering Aspects, Vol. 72, No. C, 17.06.1993, p. 173-176.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Radio-frequency dielectric spectroscopy of synthetic bilayers containing glycolipids
AU - Cametti, C.
AU - De Luca, F.
AU - Macrib, M. A.
AU - Maraviglia, B.
AU - Misasi, R.
AU - Sorice, M.
PY - 1993/6/17
Y1 - 1993/6/17
N2 - The electrical conductivity of aqueous solutions of colloidal phospholipid-ganglioside mixtures has been measured in the frequency range from 10 kHz to 100 MHz, where a conductivity dispersion due to the interfacial polarization occurs. Insertion of GM1 ganglioside in the phospholipid bilayer alters markedly the electrical behaviour of the whole suspension that exhibits some interesting features, which depend on the GM1 concentration. In a restricted range of the ganglioside concentration, the experimental data can be partially explained by introducing a surface conductivity contribution in the usual conductivity theory of heterogeneous systems. Although preliminary, these measurements indicate that gangliosides, according to the structural shape they assume, modify the electrical properties of the lipid bilayer. This effect may be relevant to understanding ganglioside interactions with lipid components of biological cell membranes.
AB - The electrical conductivity of aqueous solutions of colloidal phospholipid-ganglioside mixtures has been measured in the frequency range from 10 kHz to 100 MHz, where a conductivity dispersion due to the interfacial polarization occurs. Insertion of GM1 ganglioside in the phospholipid bilayer alters markedly the electrical behaviour of the whole suspension that exhibits some interesting features, which depend on the GM1 concentration. In a restricted range of the ganglioside concentration, the experimental data can be partially explained by introducing a surface conductivity contribution in the usual conductivity theory of heterogeneous systems. Although preliminary, these measurements indicate that gangliosides, according to the structural shape they assume, modify the electrical properties of the lipid bilayer. This effect may be relevant to understanding ganglioside interactions with lipid components of biological cell membranes.
KW - Glycolipids
KW - radio-frequency dielectric spectroscopy
KW - synthetic bilayers.
UR - http://www.scopus.com/inward/record.url?scp=0012017133&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=0012017133&partnerID=8YFLogxK
U2 - 10.1016/0927-7757(93)80464-P
DO - 10.1016/0927-7757(93)80464-P
M3 - Article
VL - 72
SP - 173
EP - 176
JO - Colloids and Surfaces A: Physicochemical and Engineering Aspects
JF - Colloids and Surfaces A: Physicochemical and Engineering Aspects
SN - 0927-7757
IS - C
ER -