Highly porous organic–inorganic hybrids have been prepared from 3-(2,4-dinitrophenylamino)propyltriethoxysilane (DNPTES) and tetraethylorthosilicate (TEOS) by sol-gel method. The hybrids were characterized by FT-IR spectroscopy, UV–vis spectroscopy and elemental analysis, and their pore characteristics were studied by nitrogen sorption porosimetry. The applicability of the hybrids as adsorbent ...

In this work, rice straw fibers were modified using NaOH, KBM-403, and tetraethyl orthosilicate (TEOS), the changes in surface groups of before after modification analyzed by infrared testing. Straw/polylactic composite prepared hot pressing, effects modifiers used on properties these blends studied conducting mechanical thermal performance tests. The results showed that tensile strength fiber ...

We investigate the effects of amplitude modulation (AM) discharge method on growth nanoparticles and relation between plasma generation in tetraethylorthosilicate (TEOS)/O2/Ar plasma. The laser-light scattering (LLS) intensity, which is proportional to density sixth power size Rayleigh regime, decreases by 18% at an AM level 10% 60% 50%. On other hand, ArI emission roughly density, higher than ...

Arvioitu teos: Külli Prillop, Karl Pajusalu, Eva Saar, Sven-Erik Soosaar & Tiit-Rein Viitso: Eesti keele ajalugu. varamu VI. Tartu: Tartu Ülikooli Kirjastus 2020. 420 s. isbn 978-9949-03-541-0.

Teos täyttää suomenkielisen tietokirjallisuuden aukkoa, sillä kasvatusteoriaa kokoavasti käsitteleviä ajantasaisia teoksia ei liikaa ole. Otsikon kuvaama aikajänne on aavistuksen mahtipontinen, kun ottaa huomioon, että pariin sataan sivuun puristettu valikoidusti eri aikojen kasvatusfilosofian ja -teorian käsittelyä.

The NH3-catalyzed formation of colloidal silica particles from tetra-ethyl-orthosilicate (TEOS) in methanol and ethanol is studied by means of light scattering and Raman spectroscopy. We find that the growth is characterized by an incubation period after which no significant nucleation takes place. The particles have uniform, non-fractal structure and show low polydispersity. In the presence of...

In this work it is proposed a novel antibacterial surface composed of an organicinorganic hybrid matrix of tetraethoxysilane (TEOS) and a weak polyelectrolyte like Poly(acrylic acid sodium salt) (PAA) which are deposited on glass slides by sol-gel method using the dip-coating technique [1]. This work is focused in the in situ synthesis of Ag nanoparticles (NPs) which are responsible of the anti...

Materials: Tetraethylorthosilicate (TEOS, 98%), aqueous ammonia (28%) were purchased from Sinopharm Chemical Reagent Co. Ltd.. Carbon black (99.5%, 30 nm) was purchased from Aladdin Co. Ltd.. Ethylene glycol (EG, 99%) and ethanol (99.9%) were purchased from J&K Co. Ltd.. Poly(ethylene glycol) methacrylate (PEGMA, Mn=360) and poly(ethylene glycol) diacrylate (PEGDA, Mn=700) was purchased from Si...