Multiple unit controlled release dosage forms offer various advantages over their single unit counterparts. Most of these advantages are associated with the uniform distribution of multiparticulates throughout the gastrointestinal tract. Though coated pellets can be filled into hard gelatin capsules, tablet formulation is the preferred one because of various advantages associated with it. Howev...

A new thermal field-flow fractionation (ThFFF) method has been developed for the separation and analysis of polyacrylates and acrylic-styrene copolymers. This important class of polymers is commonly used as pressure sensitive adhesives, in coatings and paintings, and as the basis for polyelectrolyte materials. The structure and chemical composition of these polymers play a vital role in the end...

Three kinds of UV-curable organically modified silicates have been prepared to be used as protective coatings for optical fibers. The synthesis involves the reaction of the thiol group of 3-mercaptopropyltrimethoxysilane with a C =C bond in one of the acrylic groups of three commercially available aliphatic triacrylates. The methoxysilyl groups of the synthesized diacrylate methoxysilanes were ...

Consolidation is a treatment of great importance for archaeological wall paintings due to their state preservation, in which the lack cohesion mortar and pulverulence pictorial layer are common. The objective this work has been evaluate consolidation tests that have carried out on decontextualized fragments belonging five different (from periods with differences conservation painting techniques...

Renovation coatings of car bodies undergo destruction under the influence operational factors. Like ultraviolet radiation, erosion, and aggressive media (among others, battery acid). This article concerns evaluation acid on acrylic previously non-aged, as well aged climatically for 2 years. Ageing with contributed to a degradation increase their chemical structure. It was supported by considera...

Graffiti on facades often has a heavy impact in social and economic terms, particularly when historical and artistic artefacts are affected. To limit the damages to the surfaces, preventive plans are implemented and anti-graffiti coatings are used as a protective measure. In this study, the distribution of a spray paint inside a highly porous stone, with and without anti-graffiti protection, wa...