This paper describes a facile approach to a biomimetic rapid fabrication of ultrathin silica nanotubes with a highly uniform diameter of 10 nm and inner hollow of around 3 nm. The synthesis is carried out through a spontaneous polycondensation of alkoxysilane on polyamine crystalline fibrils that were conveniently produced from the neutralization of a solution of protonated linear polyethylenei...

A simple highly versatile and efficient sonochemical synthesis of 1,2,4,5-tetrasubstituted and 2,4,5-trisubstituted imidazoles is achieved by condensation of 1,2-dicarbonyl compound, aldehyde, ammonium acetate and primary amine using antimony trichloride immobilized on silica gel (SiO2-OSbCl2) as a catalyst in ethanol at moderate temperature. Operational simplicity, practicability and applicabi...

The present study was designed to evaluate the antifungal activity of Azima tetracantha extracts and isolated compound (friedelin) against fungi. Antifungal activity was carried out using broth microdilution method and fractions were collected using (silica gel) column chromatography. The antifungal activity of Azima tetracantha crude extracts and isolated compound (friedelin) were evaluated us...

Thymus serpyllum (creeping thyme) is a newly introduced medicinal and aromatic plant in Egypt. It was grown hydroponically for this study. The goal to assess the effect of three sandponic media (sand, silica, sand with silica) foliar spraying fulvic acid (without with) on growth, herbage yield, essential oil yield. experiment designed as split plot. main plots involved spraying, while subplots ...

Marine Streptomyces sp.VITBRK3 isolated from the sediment sample collectedat the Marakkanamcoast located in the Southeast coastal region of Bay of Bengal, India. The ethyl acetate extract was prepared from the culture supernatant of Streptomyces sp.VITBRK3.The anti-MRSA compound was purified by silica gel column chromatography and HPLC. The purified compound was identified by using H and C NMR ...

BACKGROUND Pharmacological screening and usage of natural products for the treatment of human diseases has had a long history from traditional medicine to modern drugs. The majority of modern drugs are reported to be mostly from natural products. OBJECTIVE The aim of the present study was to evaluate the inhibitory activity of 5-(2,4-dimethylbenzyl) pyrrolidin-2-one (DMBPO) extracted from mar...

BACKGROUND The term "crystalline silica" refers to crystallized form of SiO2 and quartz, as the most abundant compound on the earth's crust; it is capable of causing silicosis and lung cancer upon inhaling large doses in the course of occupational exposure. The aim of this study was to assess occupational exposure to dust and crystalline silica in foundries in Pakdasht, Iran. MATERIALS AND ME...

Working as an extension of a newly developed method for a capillary electrophoretic analysis of purine nucleotides, nucleosides, bases, and catabolism, an assay of the differential metabolic properties by a novel organosiliceous anionic hydride compound, silica hydride, was evaluated with Chinese hamster ovary mitochondria using a 50-microm poly(acryloylaminopropanol)-coated, fused-silica capil...