scholarly journals Spherical Silica Gel Beads with Macropores Prepared from Water Glass

2006 ◽  
Vol 114 (1327) ◽  
pp. 282-285 ◽  
Author(s):  
Makoto OTSUDA ◽  
Ryoji TAKAHASHI ◽  
Satoshi SATO ◽  
Toshiaki SODESAWA ◽  
Masanari ISHIZUKI ◽  
...  
Keyword(s):  
Silica Gel ◽  
Water Glass ◽  
Gel Beads ◽  
Spherical Silica

ChemInform Abstract: Photofunctional Silica Gel Beads as Environmental Conscious Materials

ChemInform ◽  
2010 ◽  
Vol 41 (33) ◽  
pp. no-no
Author(s):  
Masahide Yasuda ◽  
Jin Matsumoto ◽  
Tsutomu Shiragami
Keyword(s):  
Silica Gel ◽  
Gel Beads

scholarly journals The effect of silica desiccation under different storage conditions on filter-immobilized environmental DNA

2021 ◽  
Vol 14 (1) ◽  
Author(s):  
Michael J. Allison ◽  
Jessica M. Round ◽  
Lauren C. Bergman ◽  
Ali Mirabzadeh ◽  
Heather Allen ◽  
...  
Keyword(s):  
Silica Gel ◽  
Storage Temperature ◽  
Environmental Dna ◽  
Cost Effective ◽  
Storage Conditions ◽  
Systematic Evaluation ◽  
Silica Bead ◽  
Gel Beads ◽  
Polymerase Chain

Abstract Objective Silica gel beads have promise as a non-toxic, cost-effective, portable method for storing environmental DNA (eDNA) immobilized on filter membranes. Consequently, many ecological surveys are turning to silica bead filter desiccation rather than ethanol preservation. However, no systematic evaluation of silica bead storage conditions or duration past 1 week has been published. The present study evaluates the quality of filter-immobilized eDNA desiccated with silica gel under different storage conditions for over a year using targeted quantitative real-time polymerase chain reaction (qPCR)-based assays. Results While the detection of relatively abundant eDNA target was stable over 15 months from either ethanol- or silica gel-preserved filters at − 20 and 4 °C, silica gel out-performed ethanol preservation at 23 °C by preventing a progressive decrease in eDNA sample quality. Silica gel filter desiccation preserved low abundance eDNA equally well up to 1 month regardless of storage temperature (18, 4, or − 20 °C). However only storage at − 20 °C prevented a noticeable decrease in detectability at 5 and 12 months. The results indicate that brief storage of eDNA filters with silica gel beads up to 1 month can be successfully accomplished at a range of temperatures. However, longer-term storage should be at − 20 °C to maximize sample integrity.

Immobilization of Silver Nanoparticles on Chitosan-Coated Silica-Gel-Beads and the Antibacterial Activity

2021 ◽  
Vol 892 ◽  
pp. 36-42
Author(s):  
Muhammad Iqbal Hidayat ◽  
Muhammad Adlim ◽  
Ilham Maulana ◽  
Muhammad Zulfajri
Keyword(s):  
Silver Nanoparticles ◽  
Silica Gel ◽  
Low Cost ◽  
Antibacterial Properties ◽  
Chitosan Film ◽  
Silver Ions ◽  
Filter Material ◽  
Silver Ion ◽  
Gel Beads ◽  
Metal Colloid

Silver nanoparticles (Ag0) have attracted the most attention due to their broad antimicrobial application and outstanding activity. The silver nanoparticles are usually in colloidal form, then immobilization the colloid onto solid support is still interesting to explore. In this work, a new method for silver colloidal nanoparticle immobilization on silica gel beads (SiG), which was then symbolized as Ag0-[chi-SiG] was conducted and characterized successfully. The finding proved that SiG must be coated with three chitosan film layers to give stable support for silver nanoparticles. This coating method caused the chitosan completely covered SiG, and the chitosan film provides coordination bonding for silver ions. The most appropriate solvent for silver ion impregnation on the surface of chi-SiG is methanol compared to other solvents. Tungsten lamp as the photo-irradiation, which is low cost and environmentally friendly has been proven effective for silver ion reduction, as shown by silver metal colloid UV-Vis surface plasmon resonance at 400-700 nm. Ag0-[chi-SiG] showed the antibacterial properties of inhibiting the growth Staphylococcus aureus and Escherichia coli; then it provides the potential application for antibacterial filter material. According to the weight comparison between antibacterial standard and Ag content, then Ag0-[chi-SiG] has two and five times higher of exhibiting zone for each bacteria.

Hydrodynamic chromatography of macromolecules on 2 μm non-porous spherical silica gel packings

1989 ◽  
Vol 27 (11-12) ◽  
pp. 585-590 ◽  
Author(s):  
J. C. Kraak ◽  
R. Oostervink ◽  
H. Poppe ◽  
U. Esser ◽  
K. K. Unger
Keyword(s):  
Silica Gel ◽  
Hydrodynamic Chromatography ◽  
Spherical Silica

Nanoparticles of KFeP2O7implanted on silica gel beads for Cd2+ion adsorption

2014 ◽  
Vol 36 (2) ◽  
pp. 188-197 ◽  
Author(s):  
Eduardo Ordoñez-Regil ◽  
Francisco Granados-Correa ◽  
Enrique Ordoñez-Regil ◽  
María Guadalupe Almazán-Torres
Keyword(s):  
Silica Gel ◽  
Ion Adsorption ◽  
Gel Beads

Processing of brass open-cell foam by silica-gel beads replication

2009 ◽  
Vol 209 (11) ◽  
pp. 4958-4962 ◽  
Author(s):  
Enrique M. Castrodeza ◽  
Carlo Mapelli
Keyword(s):  
Silica Gel ◽  
Open Cell ◽  
Gel Beads ◽  
Open Cell Foam ◽  
Cell Foam
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