X-ray diffraction for material science

Collet, Éric; Buron, M.; Cailleau, H.; Lorenc, Maciej; Servol, Marina; Rabiller, Philippe; Toudic, Bertrand

doi:10.1051/uvx/2009005

UVX 2008 - 9e Colloque Sur Les Sources Cohérentes Et Incohérentes UV, VUV Et X : Applications Et Développements Récents 2009

DOI: 10.1051/uvx/2009005

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X-ray diffraction for material science

Éric Collet

M. Buron

H. Cailleau

et al.

Abstract: Abstract. This paper presents different aspects of x-ray diffraction techniques for material science: investigation of symmetry breaking, electron density analysis, diffuse scattering, aperiodic systems and time-resolved experiments.

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Preparation and physicochemical characterization of Eudragit® RL100 Nanosuspension with potential for Ocular Delivery of Sulfacetamide

Mandal

2010

J Pharm Pharm Sci

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-Purpose. Polymeric nanosuspension was prepared from an inert polymer resin (Eudragit RL100) with the aim of improving the availability of sulfacetamide at the intraocular level to combat bacterial infections. Methods. Nanosuspensions were prepared by the solvent displacement method using acetone and Pluronic F108 solution. Drug to polymer ratio was selected as formulation variable. Characterization of the nanosupension was performed by measuring particle size, zeta potential, Fourier Transform infrared spectroscopy (FTIR), Differential Scanning Calorimetry (DSC), Powder X-Ray Diffraction (PXRD), drug entrapment efficiency and in vitro release. In addition, freeze drying, redispersibility and short term stability study at room temperature and at 4 0 C were performed. Results. Spherical, uniform particles (size range below 500 nm) with positive zeta potential were obtained. No significant chemical interactionbetween drug and polymer were observed in the solid state characterization of the freeze dried nanosuspension (FDN). Drug entrapment efficiency of the selected batch was increased by pH alteration and addition of polymethyl methacrylate in the formulation. The prepared nanosuspension exhibited good stability after storage at room temperature and at 4 0 C. Sucrose and mannitol were used as cryoprotectants and exhibited good water redispersibility of the FDN. Conclusion. The results indicate that the formulation of sulfacetamide in Eudragit RL100 nanosuspension could be utilized as potential delivery system for treating ocular bacterial infections. _____________________________________________________________________________________

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Preparation and physicochemical characterization of Eudragit® RL100 Nanosuspension with potential for Ocular Delivery of Sulfacetamide

Mandal

2010

J Pharm Pharm Sci

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X-ray diffraction for material science

Abstract: Abstract. This paper presents different aspects of x-ray diffraction techniques for material science: investigation of symmetry breaking, electron density analysis, diffuse scattering, aperiodic systems and time-resolved experiments.

Cited by 1 publication

References 17 publications

Preparation and physicochemical characterization of Eudragit® RL100 Nanosuspension with potential for Ocular Delivery of Sulfacetamide

Preparation and physicochemical characterization of Eudragit® RL100 Nanosuspension with potential for Ocular Delivery of Sulfacetamide

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