Results 281 to 290 of about 1,378,977 (352)
Some of the next articles are maybe not open access.
Living bacteria in silica gels
Nature Materials, 2002The encapsulation of enzymes within silica gels has been extensively studied during the past decade for the design of biosensors and bioreactors. Yeast spores and bacteria have also been recently immobilized within silica gels where they retain their enzymatic activity, but the problem of the long-term viability of whole cells in an inorganic matrix ...
Nadine, Nassif +5 more
openaire +2 more sources
Chemical modification of silica gels
Journal of Sol-Gel Science and Technology, 1997Highly porous pure and polyethyleneglycol (PEG)-doped silica gels have been prepared from tetraethyl orthosilicate (TEOS) in ethanol using NH4OH base-catalysis. Addition of PEG to the SiO2-systemincreases the average particle size and most frequent pore diameter of the resultant gels while their total surface areadecreases.
M.S.W. Vong, N. Bazin, P.A. Sermon
openaire +1 more source
SPIE Proceedings, 1990
ABSTRACT Sol-gel processing is used to make two new types of silica optics, Type V fully dense silica and Type VIoptically transparent ultraporous silica. Type VI silica is an ideal matrix for impregnation with second phases that are optically active, resulting in a hybrid optical material with a unique combination of properties.
Larry L. Hench +3 more
openaire +1 more source
ABSTRACT Sol-gel processing is used to make two new types of silica optics, Type V fully dense silica and Type VIoptically transparent ultraporous silica. Type VI silica is an ideal matrix for impregnation with second phases that are optically active, resulting in a hybrid optical material with a unique combination of properties.
Larry L. Hench +3 more
openaire +1 more source
European Polymer Journal, 2002
Abstract Silica gel microspheres 7 and 15 μm in diameter were coated with an overlayer of polyaniline camphorsulfonate or hydrochloride during the oxidative polymerization of aniline. Coated silica gel and polyaniline precipitate were separated using a difference in sedimentation rate.
Jaroslav Stejskal +7 more
openaire +1 more source
Abstract Silica gel microspheres 7 and 15 μm in diameter were coated with an overlayer of polyaniline camphorsulfonate or hydrochloride during the oxidative polymerization of aniline. Coated silica gel and polyaniline precipitate were separated using a difference in sedimentation rate.
Jaroslav Stejskal +7 more
openaire +1 more source
Flame retardant mechanism of silica gel/silica
Fire and Materials, 2000Various types of silica, silica gel, fumed silicas and fused silica were added to polypropylene and polyethylene oxide to determine their flame retardant effectiveness and mechanisms. Polypropylene was chosen as a non-char-forming thermoplastic and polyethylene oxide was chosen as a polar char-forming (slight) thermoplastic.
Takashi Kashiwagi +5 more
openaire +1 more source
Toroidal microporous silica gel
Journal of Materials Science, 1979Microporous amorphous silica gel with a characteristic toroidal form of the elementary particles, has been prepared by thermal dissociation of a solution of silicic acid in a spray dryer. The substance obtained was investigated by electron microscopy, infra-red spectroscopy and thermal analysis.
A. Zapryanova +2 more
openaire +1 more source
Zone electrophoresis in silica gel and silica paste
Biochimica et Biophysica Acta, 1960Abstract Silica gel and silica paste have been used as anticonvection media in zone electrophoresis. Rapid methods for preparing gels and pastes containing the appropriate electrophoretic buffer, and their use in zone electrophoresis, are given.
openaire +2 more sources
2001
[10028-15-6] O3 (MW 48.00) InChI = 1S/O3/c1-3-2 InChIKey = CBENFWSGALASAD-UHFFFAOYSA-N (powerful oxidizing agent; capable of oxidizing carbon–hydrogen bonds2 and a variety of electron-rich functional groups; provides a high effective concentration of ozone2a) Physical Data: ozone, mp −193 °C; bp −111.9 °C; d (0 °C, gas ...
openaire +1 more source
[10028-15-6] O3 (MW 48.00) InChI = 1S/O3/c1-3-2 InChIKey = CBENFWSGALASAD-UHFFFAOYSA-N (powerful oxidizing agent; capable of oxidizing carbon–hydrogen bonds2 and a variety of electron-rich functional groups; provides a high effective concentration of ozone2a) Physical Data: ozone, mp −193 °C; bp −111.9 °C; d (0 °C, gas ...
openaire +1 more source
2008
(for fluorous solid-phase extraction (F-SPE) of fluorous compounds including catalysts, scavengers, reagents, small molecules, and biomolecules; HPLC stationary phase for analysis and separation of fluorinated and nonfluorinated compounds) Physical Data: free-flowing white powder, SPE-grade silica gel, 8.5% carbon loading, average particle size ...
openaire +1 more source
(for fluorous solid-phase extraction (F-SPE) of fluorous compounds including catalysts, scavengers, reagents, small molecules, and biomolecules; HPLC stationary phase for analysis and separation of fluorinated and nonfluorinated compounds) Physical Data: free-flowing white powder, SPE-grade silica gel, 8.5% carbon loading, average particle size ...
openaire +1 more source
Journal of Non-Crystalline Solids, 1988
Abstract The elastic modulus, modulus of rupture (MOR), and viscosity of wet silica gels were measured as functions of age of the gels, using a beam-bending method. The gels were prepared by acid-catalyzed hydrolysis of tetraethyl orthosilicate (TEOS) with a water/TEOS ratio of 16/1.
George W. Scherer +2 more
openaire +1 more source
Abstract The elastic modulus, modulus of rupture (MOR), and viscosity of wet silica gels were measured as functions of age of the gels, using a beam-bending method. The gels were prepared by acid-catalyzed hydrolysis of tetraethyl orthosilicate (TEOS) with a water/TEOS ratio of 16/1.
George W. Scherer +2 more
openaire +1 more source