Surface properties of silica gel samples modified by selected proteins
- 67 Downloads
The adsorption of a polar (water) and a non-polar (n-octane) liquid on silica gels, modified by adsorption of proteins, has been studied by thermal analysis. Silica gels with physically adsorbed BSA and ovalbumin layers were used. Thermodesorption energies were determined from Q-TG and Q-DTG curves recorded under quasi-equilibrium conditions. Significant differences in liquid desorption were observed from the surfaces due to heterogeneous changes (energetic and geometrical) as a result of modification. These results are compared with those obtained for the samples heated at 160°C for 1 h.
Keywordsadsorption albumin fractal dimension heterogeneity protein surface thermogravimetry Q-TG
Unable to display preview. Download preview PDF.
- 14.Allenmark, S, Anderson, S 1986J. Liq. Chromatogr.12345Google Scholar
- 20.Gilpin, RK, Gao, H, Jaroniec, M 1992J. Liq. Chromatogr.152503Google Scholar
- 21.Gilpin, RK, Ehtesham, SE, Gregory, RB 1991Anal. Chem.6363Google Scholar
- 29.Ross, PD, Shrake, A 1988J. Biol. Chem.26311202Google Scholar
- 32.Kisielev, AB, et al. 1958The Structure and Properties of Porous MaterialsButterworthsLondon195Google Scholar
- 33.Pfeifer, P, Avnir, D 1983J. Chem. Phys.794573Google Scholar
- 34.Pfeifer, P, et al. 1986Fractals in PhysicsNorth-HollandAmsterdam72Google Scholar