By chemical screening methods we detected in the mycelium of Streptomyces griseoflavus (strain Tii 2880) the colabomycin-complex2) and a second compound, called 2880-ll (Rf values see Table 1). 2880-ll absorbed UV light on Silica gel F254, and turned black with molybdatophosphoric acid and dark brown with vanillinsulfuric acid. It could be separated from the crude extracts by silica gel chromat...

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Abstract Mesoporous silica is an inorganic material that has high potential to be applied in various industrial fields, one of its applications the adsorption method. To maximize mesoporous silica, modification surface was carried out by adding amine compounds. The compound used as a modifier dimethylamine (DMA), using glycidoxypropyltrimethoxysilane (GPTMS) linking compound. column method uses...

Silane coupling agent generally use as improve the properties of white filler use in rubber compound for better dispersion. Also silane coupling agent reacts with organic filler & polymer chain as crosslink. Here in this research study the crosslink density & swelling phenomena of silane participate in vulcanization process with Nitrile rubber compound. Also show the comparisons of carbon fille...

Mesoporous silica LUS-1 (Laval University Silica) was successfully functionalized by propyl sulfonic acid and was used as a recyclable catalyst for the synthesis of acridine-1,8-diones via a pseudo four component reaction of aromatic aldehydes, dimedone and ammonium acetate (or anilines). The excellent yields, short reaction time, simple work-up procedure, and environmentally friendly condition...

Photochromic compound-conjugated fluorescent fullerene-silica nanoparticles prepared by the reverse-microemulsion method was utilized for photoswitchable cellular imaging by repeatable irradiation of ultraviolet and visible light.

A new polymorph crystalline silica composition having uniform pore dimensions were synthesized by calcining a crystalline hydrated alkyl-ammonium silicate. The pore dimensions approximately were 6 angstrom for silicalite-1 and 11 angstrom for silicalite-2 units. The silicalite-1 was prepared hydrothermally at a pH of about 10 from a reaction mixture consist of water, amorphous silica and a ...