correspondence: Qi shen school of Pharmacy, shanghai Jiao Tong University, Dongchuan road 800, shanghai 200240, People’s republic of china Tel +86 21 3420 4049 Fax +86 21 3420 4049 email [email protected] Background: The aim of this study was to develop new systems for transdermal delivery of paeonol, in particular microemulsion gel and cubic gel formulations. Methods: Various microemulsion veh...

Least toxic physical and chemical solutions are often part of an IPM program. Various forms of amorphous silica are commonly used as part of this strategy. Diatomaceous earth and silica gel are used in various physical formulations with or without added pesticide. The type of silica and the formulation depend on the target pest. In this issue advantages and disadvantages of diatomaceous earth a...

The Co-terpyridine complex immobilized on silica gel works as a reusable hydrosilylation catalyst under K 2 CO 3 activation. This setup can be applicable to continuous flow reactor system.

A new brush-type HPLC chiral stationary phase (CSP) comprising π-acidic N-(3,5-dinitrobenzoyl)-D-α-phenylglycine chiral units bound to the quinoxaline units of modified γ-aminopropyl silica gel by a 1,2-diaminoethane spacer has been prepared by solid-phase synthesis. To test the CSP attempts were made to separate the enantiomers of twenty-two racemates with different functional groups and the r...

Silica gel/water adsorption cooling systems suffer from size, performance and cost limitations. Therefore, there is a need for new adsorbent materials that outperform silica gel. Metal organic frameworks (MOFs) are newmicro-porousmaterials that have extraordinary porosity and uniform structure. Due to the lack of published data that characterise MOF/water adsorption, this paper experimentally i...

background and objectives: the plants belonging to the genus heliotropium l. (boraginaceae) are the main sources of toxic pyrrolizidine alkaloids (pas). in the present study, we have investigated the pas of the aerial parts of heliotropium transoxanum bunge, a perennial species native to iran. methods: silica gel column chromatography and silica gel ptlc were applied for the isolation of pas pr...

In this study, silica gel was extracted from rice husk ash using a modified acid-leaching process. The then characterized an X-ray Diffractometer (XRD) and Fluorescence (XRF). At different loadings of 0, 0.05 0.10 wt.%, used as cross-linker in the membrane formulation. Fourier Transform Infrared Spectroscopy (FTIR) Scanning Electron Microscopy (SEM) were to characterize membranes, while their p...

Two new silica-gel phases were produced directly via the chemical interaction of 3-chloropropyltrimethoxysilane modified silica gel with 8-aminoquioline, phase I and 2-aminopyridine, phase II under reflux conditions. The selectivity properties exhibited by the phases under investigation for the uptake of Ca(II), Mg(II), Fe(III), Co(II), Ni(II), Cu(II), Zn(II), Cd(II) and Pb(II) were determined ...

Ultra-small gold nanoparticles incorporated in mesoporous silica thin films with accessible pore channels perpendicular to the substrate are prepared by a modified sol-gel method. The simple and easy spin coating technique is applied here to make homogeneous thin films. The surface characterization using FESEM shows crack-free films with a perpendicular pore arrangement. The applicability of th...