We investigate correspondences between extreme amenability and amenability of automorphism groups of Fraïssé-Hrushovski generic structures that are obtained from smooth classes, and their Ramsey type properties of their smooth classes, similar to [7,13]. In particular, we focus on some Fraïssé-Hrushovski generic structures that are obtained from pre-dimension functions. Using these correspondences, we prove that automorphism groups of ordered Hrushovski generic graphs are not extremely amenable in both cases of collapsed and uncollapsed. Moreover, we prove that automorphism groups of Fraïssé-Hrushovski generic structures that are obtained from pre-dimension functions with rational coefficients are not amenable.

Mixed block copolymers have been used as a template in the synthesis of new mesoporous silica particles, prepared from sol-gel method. The prominent effect of the block copolymers have been used to provide a new template that controls the surface area and porosity of the particles. Tetraethyl orthosilicate as silica source and two block copolymers, poly(propylene oxide)-b-poly(ethylene oxide)-b-poly(propylene oxide) and poly(ethylene oxide)-b-poly(propylene oxide)-b-poly(ethylene oxide) (Pluronics) as a surfactant, were used in water/n-octane co-solvent with citric acid catalyst to prepare new nanostructures of mesoporous silica (SPB 1 and SPB 1,2 ). The displacement of ethanol with cyclohexanol as a co-surfactant drastically changed the surface properties of the new mesoporous silica particles (SPB 1,2 ). The surface area, porosity, morphology, and microstructure of particles were characterized by X-ray diffraction, nitrogen adsorption-desorption, scanning electron microscopy), and transmission electron microscopy. The prepared particles have been specifically characterized for specific use and applications as supporting catalysts for the polymerization of vinyl acetate, drugs delivery, and in the membranes manufacturing based on polyurethanes.

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