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15  Articles
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Controlled release of Levofloxacin Hemihydrate drug through Methyl Methacrylate grafted Poly (vinyl alcohol) (PVA-g-MMA) hydrogel membranes have been investigated. These graft co-polymer hydrogel membranes of various formulations were prepared using conve... see more

In this work, properties of sulphate technogenic raw material – flue gas desulphurization (FGD) gypsum have been investigated in order to obtain a-hemihydrate gypsum as gypsum binding material. FGD gypsum is produced as a by-product during the process of ... see more

Several crystal forms of valacyclovir hydrochloride, including two anhydrous and three hydrates, were investigated in this study. At the same time, a new hemihydrate of valacyclovir hydrochloride was first discovered and its properties were characterized ... see more

Investigations, conducted in this study showed that waste phosphogypsum-dihydrate represents a burden which even must not be kept in deposits because of its large quantity in relation to the main product – phosphoric acid, as well as because of great impa... see more

Abstract: As a recycled material, flue gas desulfurization gypsum has been used to prepare calcium sulfate hemihydrate whisker (CSHW) through hydrothermal synthesis for several decades. However, the subsequent utilization of this resultant material has no... see more

The problem of recycling and storage of phosphogypsum is relevant for many coun- tries of the world, as it is associated with environmental problems such as pollution of water bodies, soil and atmosphere. This study analyzes the possibility of using phosp... see more


O sulfato de cálcio hemiidratado (comercialmente conhecido como gesso) é obtido através da desidratação parcial do minério gipsita. A depender das condições termodinâmicas de calcinação do minério podem ser obtidas diferentes variações do hemihidrato. O o... see more


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