Mais les résultats doivent être attendus longtemps et il n'y a généralement pas de temps azithromycine prix L'autre cas, c'est que l'achat d'un ou d'un autre antibiotique dans une pharmacie classique nécessite des dépenses matérielles considérables et pas toutes les personnes ne peuvent acheter des produits pharmaceutiques aussi coûteux.
Microsoft word - shammi akter ferdousi phd thesis abstract
Department of Chemical and Biomolecular Engineering
Hong Kong University of Science and Technology
Spatial Doping of 1D Titanium Nanotubes Shammi Akter FERDOUSI
Abstract
This research works has invented a novel general synthesis method for producing spatial doping in 1D titanium based nanotubes. For this, we divided our works in two phases. In first phase of the works, we present general synthesis methods for producing 1D Ti-based nanostuctures, more precisely, mainly nanotubes and elucidate their formation mechanisms based on exsitu microscopic analysis and insitu spectroscopic analysis. Titanium based nanostructures are produced from different Ti-sources by using alkaline microwave hydrothermal irradiation techniques. There are number of factors that affect its nanostructure of this method. Post treatment washing is the main crucial step that depends on some parameters which affects Ti-nanotube structure, morphology, crystal size, textural properties and composition etc. In second phase of works, we present, again, a new synthesis method to prepare metal and metal oxide, dye etc doped on different spatial locations of the titania nanotubes (i.e. core, surface and interlayer spaces). The precursors are introduced by either in-situ or ex-situ techniques to the titania precursor materials. Dopants from the Group IB, IIB, IVB, V and VIII element including Ag, Au, Co, Cu, Pd, Pt and V and their oxides etc are successfully doped on the surface, in the core and within the interlayer spaces of the titania nanotubes. The location of the dopants is manipulated by controlling the affinity of the dopant precursor to the titania surface during the preparation. Precursor with low affinity will preferentially decorate the nanotube surface, whereas strong affinity will lead to metal being embedded between the interlayer spaces of the nanotube. Intermediate affinity allows core-filling to produce metal particles, slugs or nanowires within the core of the nanotubes. Microscopy and spectroscopy studies are carried out to investigate the structural, chemical and electronic properties of these new nanotube materials and explore to application for catalytic conversions, biomedical applications etc. To examine of as prepared doped Ti-nanotubes, visible light photocatalytic and antibacterial test have been done. Here tried first, silver doped Ti-nanotubes that can apply for adsorption, UV and/or visible range photocatalyst or antimicrobial properties. Application results found 100% adsorption ability for diclofenac sodium (DFS), an endocrine disrupting compounds and 99% degradation ability for a model pollutant, 2,4 dicholorphenol compare to P25 (10%). The samples can effectively works as a bacterial inhibitor and bactericidal properties for Staphylococcus aureus (S. aureus) and Escherichia coli (E.coli). For E-coli 100% reduction activity is found. We vastly present the S.aureus reduction activity under different conditions, such as, UVA, under dark and/or under lamp (screen lamp). Most cases S. aureus reduction activity found 99.999%. Date: 10 February 2014 (Monday) Time: 15:00 Venue: Room 4577 (Lift 27-28) Examination Committee: Prof. Yijing YAN, Chairman Prof. King Lun YEUNG, Supervisor Prof. Guohua CHEN, Prof. Chi Ming CHAN, CBME Prof. Joseph K. C. Kwan, HSEO Prof. Jesus SANTAMARIA, University of Zaragoza - ALL ARE WELCOME -
ELENA PITA CALANDRE Universidad de Granada. Granada. FORMACIÓN EXPERIENCIA PROFESIONAL Profesora de Farmacología en la Facultad de Medicina de Granada Facultativo Especialista de Área en el Hospital Clínico de Granada EXPERIENCIA INVESTIGADORA Y/O DOCENTE Profesora y directora de trabajos de fin de master en el Master de Neurociencias y Dolor de la Universidad de Granad
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