The aim of the present research was to prepare and evaluate a gastroretentive drug delivery system for metformin HCl, using synthetic and semi-synthetic polymers. The floating approach was applied for preparing gastroretentive tablets (GRT) and these tablets were manufactured by the direct compression method. The drug delivery system comprises of synthetic and semi-synthetic polymers such as po...

Metakaolin-based alkali activated mortars (AAM) - with and without CuSO4·5H2O ZnO addition (mass ratio Mn+/solid binder 0.08% to 1.7%) were casted exposed within an extensive long-term field campaign over the period of 20 months a sewer basin, strongly affected by biogenic acid corrosion. (Un-)exposed AAM tested regarding their physicochemical microstructural properties, bioreceptivity overall ...

Waterborne polyurethane-urea (WBPUU) dispersions, products having none or low contents of organic solvents, depending on the used synthesis process, can provide suitable environmentally-friendly strategies to prepare novel materials. Moreover, waterborne systems enable incorporation aqueous dispersible nanoentities and soluble additives, which provides a strategy design versatile functional mat...

Background: Nowadays, natural antioxidants are used to replace synthetic antioxidants for delaying or preventing the oxidation of edible oils. In this study, phenolic compounds and antioxidant properties of methanol extracts of Spirulina microalgae (Arthrospira platensis) were measured. Methods: Phenolic content was measured by Folin–Ciocalteau method and antioxidant activity was measured by th...