Abstract: In this research, TiO2 - SiO2 composite films are prepared by sol-gel method. The relat... more Abstract: In this research, TiO2 - SiO2 composite films are prepared by sol-gel method. The relationship between the effect and amount of SiO2 addition on properties of TiO2 films is investigated. X-ray diffraction, SEM observation of the microstructure and infra-red spectroscopy is ...
SIMS and XPS were used to characterise the chemistry of thin plasma polymerised acrylic acid film... more SIMS and XPS were used to characterise the chemistry of thin plasma polymerised acrylic acid films (ppAAc), and to determine how this was influenced by plasma power. Quartz microbalance weight measurements were used to monitor the effect of power on the deposition rate and ...
Journal of Radioanalytical and Nuclear Chemistry, 1986
Photon activation analysis has been success-fully applied to the fast and non-destructive analysi... more Photon activation analysis has been success-fully applied to the fast and non-destructive analysis of tin in cassiterite ores based on the 159.7 keV gamma line of123mSn produced in the124Sn/γ, n/123mSn reaction. In order to improve the accuracy of analytical results, corrections for self-absorption and pile-up effects were performed. Under typical conditions /15 μA electron beam current, 15 MeV bremsstrahlung energy, 5 min irradiation time and 10 min measurement/ the sensitivity of the analysis is 10 ppm. The proposed method can be used for routine analysis of tin in geological samples.
PAF synthesized by or added to the endothelial cell monolayer has as first target the endothelium... more PAF synthesized by or added to the endothelial cell monolayer has as first target the endothelium itself, inducing the expression of GMP-140 on the cell surface and qualitative alterations in the composition of glycocalyx. As seen by ESCA, sulfated chemical groups were significantly reduced after PAF stimulation. This reduction depended on selective loss of sulfated proteoglycans that were released into the supernatant. The alteration of glycocalyx may favor functional exposure of GMP-140 and of PAF on the surface of endothelial cells and may reduce charge repulsive forces between cells. PAF associated with endothelial cell surface has as second target PMNs and stimulates in cooperation with GMP-140, the functional activation of PMN CD11-CD18 adhesion molecules.
Plasma polymerised acrylic acid (ppAAc) coatings were deposited on aluminium substrates from acry... more Plasma polymerised acrylic acid (ppAAc) coatings were deposited on aluminium substrates from acrylic acid plasmas at various plasma powers (P). The chemistry of the ppAAc deposit was characterised using X-ray photoelectron spectroscopy (XPS) and trifluoroethanol derivatisation of the carboxylic acid functionalities. The absorption of atmospheric moisture by ppAAc was quantified using a vibrating quartz crystal microbalance. The solubility in ethanol,
Abstract: In this research, TiO2 - SiO2 composite films are prepared by sol-gel method. The relat... more Abstract: In this research, TiO2 - SiO2 composite films are prepared by sol-gel method. The relationship between the effect and amount of SiO2 addition on properties of TiO2 films is investigated. X-ray diffraction, SEM observation of the microstructure and infra-red spectroscopy is ...
SIMS and XPS were used to characterise the chemistry of thin plasma polymerised acrylic acid film... more SIMS and XPS were used to characterise the chemistry of thin plasma polymerised acrylic acid films (ppAAc), and to determine how this was influenced by plasma power. Quartz microbalance weight measurements were used to monitor the effect of power on the deposition rate and ...
Journal of Radioanalytical and Nuclear Chemistry, 1986
Photon activation analysis has been success-fully applied to the fast and non-destructive analysi... more Photon activation analysis has been success-fully applied to the fast and non-destructive analysis of tin in cassiterite ores based on the 159.7 keV gamma line of123mSn produced in the124Sn/γ, n/123mSn reaction. In order to improve the accuracy of analytical results, corrections for self-absorption and pile-up effects were performed. Under typical conditions /15 μA electron beam current, 15 MeV bremsstrahlung energy, 5 min irradiation time and 10 min measurement/ the sensitivity of the analysis is 10 ppm. The proposed method can be used for routine analysis of tin in geological samples.
PAF synthesized by or added to the endothelial cell monolayer has as first target the endothelium... more PAF synthesized by or added to the endothelial cell monolayer has as first target the endothelium itself, inducing the expression of GMP-140 on the cell surface and qualitative alterations in the composition of glycocalyx. As seen by ESCA, sulfated chemical groups were significantly reduced after PAF stimulation. This reduction depended on selective loss of sulfated proteoglycans that were released into the supernatant. The alteration of glycocalyx may favor functional exposure of GMP-140 and of PAF on the surface of endothelial cells and may reduce charge repulsive forces between cells. PAF associated with endothelial cell surface has as second target PMNs and stimulates in cooperation with GMP-140, the functional activation of PMN CD11-CD18 adhesion molecules.
Plasma polymerised acrylic acid (ppAAc) coatings were deposited on aluminium substrates from acry... more Plasma polymerised acrylic acid (ppAAc) coatings were deposited on aluminium substrates from acrylic acid plasmas at various plasma powers (P). The chemistry of the ppAAc deposit was characterised using X-ray photoelectron spectroscopy (XPS) and trifluoroethanol derivatisation of the carboxylic acid functionalities. The absorption of atmospheric moisture by ppAAc was quantified using a vibrating quartz crystal microbalance. The solubility in ethanol,
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