Biohybrid of methylotrophic yeast and organically modified silica gels from sol–gel chemistry of tetraethoxysilane and dimethyldiethoxysilane

2019 ◽  
Vol 92 (2) ◽  
pp. 359-366
Author(s):  
O. N. Ponamoreva ◽  
D. G. Lavrova ◽  
O. A. Kamanina ◽  
P. V. Rybochkin ◽  
A. V. Machulin ◽  
...  
Keyword(s):  
Sol Gel ◽  
Methylotrophic Yeast ◽  
Silica Gels ◽  
Modified Silica ◽  
Organically Modified ◽  
Organically Modified Silica ◽  
Modified Silica Gels

Holographic diffraction gratings recording in organically modified silica gels: erratum

1997 ◽  
Vol 22 (3) ◽  
pp. 193
Author(s):  
P. Cheben ◽  
T. Belenguer ◽  
A. Nuñez ◽  
F. del Monte ◽  
D. Levy
Keyword(s):  
Diffraction Gratings ◽  
Silica Gels ◽  
Modified Silica ◽  
Organically Modified ◽  
Organically Modified Silica ◽  
Modified Silica Gels

Holographic diffraction gratings recording in organically modified silica gels

1996 ◽  
Vol 21 (22) ◽  
pp. 1857 ◽  
Author(s):  
P. Cheben ◽  
F. del Monte ◽  
D. Levy ◽  
T. Belenguer ◽  
A. Nuñez
Keyword(s):  
Diffraction Gratings ◽  
Silica Gels ◽  
Modified Silica ◽  
Organically Modified ◽  
Organically Modified Silica ◽  
Modified Silica Gels

DLS and AFM Studies on the Cluster Evolution of Organically Modified Silica Gels Catalyzed by a Super Strong Acid

2007 ◽  
Vol 40 (10) ◽  
pp. 3773-3778 ◽  
Author(s):  
Yusuke Takata ◽  
Tomohisa Norisuye ◽  
Satoshi Hirayama ◽  
Tsuyoshi Takemori ◽  
Qui Tran-Cong-Miyata ◽  
...  
Keyword(s):  
Strong Acid ◽  
Silica Gels ◽  
Modified Silica ◽  
Cluster Evolution ◽  
Organically Modified ◽  
Organically Modified Silica ◽  
Modified Silica Gels

Structural Characterization of Gels Prepared from Co-Hydrolysis of Tetraethoxysilane and Dimethyldiethoxysilane.

1992 ◽  
Vol 271 ◽  
Author(s):  
Florence Babonneau ◽  
Laurence Bois ◽  
Jacques Livage
Keyword(s):  
Structural Characterization ◽  
Silica Gels ◽  
Condensation Process ◽  
Modified Silica ◽  
Polymeric Gels ◽  
Organically Modified ◽  
Organically Modified Silica ◽  
Hydrolysis Of ◽  
Modified Silica Gels

ABSTRACTThis work is part of a more general study on the structural characterization of organically modified silica gels that are usually prepared from tetrafunctional, trifunctional and difunctional alkoxides. The systems that were investigated in this paper are gels prepared from co-hydrolysis of dimethyldiethoxysilane (DEDMS) and tetraethoxysilane (TEOS). The condensation process was followed by 29Si and 17O liquid NMR and shows clearly evidence for co-condensation reactions. Gels with various DEDMS/TEOS ratios were studied by 29Si and 1H MAS-NMR. The results are clearly correlated to the change in physical properties of the materials, from flexible polymeric gels at high DEDMS content to crosslinked brittle networks at low DEDMS content.

Enhanced biodegradation of atrazine by bacteria encapsulated in organically modified silica gels

2018 ◽  
Vol 510 ◽  
pp. 57-68 ◽  
Author(s):  
Joey J. Benson ◽  
Jonathan K. Sakkos ◽  
Adi Radian ◽  
Lawrence P. Wackett ◽  
Alptekin Aksan
Keyword(s):  
Silica Gels ◽  
Modified Silica ◽  
Organically Modified ◽  
Enhanced Biodegradation ◽  
Organically Modified Silica ◽  
Modified Silica Gels

scholarly journals Cross-Condensation Reactions in an Organically Modified Silica Sol-Gel

1994 ◽  
Vol 346 ◽  
Author(s):  
S. Prabakar ◽  
R. A. Assink ◽  
N. K. Raman ◽  
C. J. Brinker
Keyword(s):  
Experimental Error ◽  
Molecular Level ◽  
Sol Gel ◽  
Resonance Assignments ◽  
Silica Sol ◽  
Modified Silica ◽  
Organically Modified ◽  
Organically Modified Silica ◽  
Acid Catalyzed ◽  
Hydrolysis Of

ABSTRACTHigh resolution 29Si NMR has been used to study the extent of cross condensation taking place in a hybrid organic/inorganic sol-gel system. Tetraethoxysilane (TEOS) and methyltriethoxysilane (MTEOS) sol-gels were chosen for this purpose. The sols were prepared by acid catalyzed hydrolysis of TEOS and MTEOS with a H2O/Si ratio of 0.3. 29Si NMR shows signals due to both self-condensation and cross-condensation between TEOS and MTEOS. Resonance assignments were made by comparing the positions and intensities of peaks in the spectra of single and multicomponent systems. It was found that, within experimental error, the self- and cross-condensation rates are equal and that extensive molecular level mixing takes place during the early stages of the reaction.

Sign in / Sign up

Export Citation Format

Share Document