نتایج جستجو برای: sol gel chemistry

تعداد نتایج: 217555  

Journal: :iranian journal of pharmaceutical research 0
golnar dorraj department of pharmaceutics and nanotechnology, school of pharmacy, shahid beheshti university of medical sciences, tehran, iran. hamid reza moghimi department of pharmaceutics and nanotechnology, school of pharmacy, shahid beheshti university of medical sciences, tehran, iran.

abstractvarious nanoparticles have been investigated as novel drug delivery systems, including solid lipid nanoparticles (slns). due to their rapid clearance from systemic circulation, nanoparticles do not provide sustained action in most cases. different strategies have been employed to overcome this problem. in this direction, the present study introduces erodible in-situ forming gel systems ...

Journal: :iranian journal of pharmaceutical sciences 0
golnar dorraj department of pharmaceutics and nanotechnology, school of pharmacy, shahid beheshti university of medical sciences, po box: 14155-6153, tehran, iran. hamid r. moghimi department of pharmaceutics and nanotechnology, school of pharmacy, shahid beheshti university of medical sciences, tehran, iran. pharmaceutical sciences research center, shahid beheshti university of medical sciences, tehran, iran.

preparation and characterization of thermoresponsive in-situ forming poloxamer hydrogel for controlled release of nile red-loaded solid lipid nanoparticles. nanoparticles (nps) are cleared rapidly from systemic circulation and do not provide sustained action in most cases. to solve this problem, this investigation introduces an erodible in-situ forming gel system as potential vehicles for prolo...

2015
N Fe I. Rajani Moneesha Fernandes

This paper presents experimental analysis and results of GaN (being a III-V semiconductor) doped with Ferrite elements synthesized using Sol-Gel technique which are carried out at National Chemical Laboratory, Pune Maharashtra. The GaN is employed as dopant for x=1 and x=5, in the formula Ga(2x) N Fe2(49-x) O3 . A non-spinel ferrite system ( Fe2 O3) is chosen for our study. The XRD (Structural)...

Journal: :Journal of oleo science 2011
Clara Morita Hiroki Sugimoto Yoshiro Imura Takeshi Kawai

A heat-induced O/W emulsion gel that undergoes a phase transition from sol to gel on heating was formed from the addition of aqueous HCl to a toluene solution of a long-chain amidoamine derivative (C18AA). The heat induced O/W emulsions are highly sensitive to temperature, and the sol-gel transition temperature could be simply controlled by adjusting the C18AA concentration. Interestingly, the ...

Journal: :Physik Journal 1989

Journal: :Journal of the Japan Society of Colour Material 1995

2007
W. L. WARREN

We have fabricated high quality sol-gel derived silicate and aluminoborosilicate thin films deposited on silicon substrates. From capacitance vs voltage measurements we observe low interface trap densities (<10H/cm2eV) and very low densities of slow interface state (<101~ 2) in most films investigated. We have been able to make significant improvements over previous sol-gel derived oxides on si...

2011
Moran Shalev Altstein Miriam

The paper describes development of a sol-gel based immunoaffinity method for the steroid hormone levonorgestrel (LNG) and the effects of changes in the sol-gel matrix format on the activity of the entrapped antibodies (Abs) and on matrix structure. The best sol-gel format for Ab entrapment was found to be a tetramethoxysilane (TMOS) based matrix at a TMOS:water ratio of 1:8, containing 10% poly...

2017
Peng Zhang Kwang-leong Choy

Highlights 2  Single phase LaTi2Al9O19 (LTA) has been successfully synthesized by sol-gel method at relatively low temperature (1350 o C), something not previously investigated.  The sol-gel synthesized LTA shows good thermochemical stability up to 1500 o C.  Sol-gel synthesized LTA shows higher coefficients of thermal expansion than the solid state reaction synthesized LTA.  LTA is a face ...

Journal: :Journal of the Ceramic Society of Japan 1993

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