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Evaluation of the influence of filler sort and lubricant type and concentration on the parameters of the compaction equation
Ondrejček, Pavel ; Rabišková, Miloslava (advisor) ; Vetchý, David (referee) ; Bělohlav, Zdeněk (referee)
Charles University in Prague, Faculty of Pharmacy in Hradec Králové Department of Department of pharmaceutical technology Candidate Mgr. Pavel Ondrejček Supervisor prof. PharmDr. Miloslava Rabišková, CSc. Title of Doctoral Thesis Evaluation of the influence of filler sort and lubricant type and concentration on the parameters of the compaction equation This thesis is dealing with an evaluation of the compaction process of pharmaceutical excipients and their mixtures. The effect of the filler type, lubricant type and its concentration on the parameters of the compaction equation developed by Assoc. Prof. RNDr. Milan Řehula, CSc. is studied. Microcrystalline cellulose Avicel PH-200, lactose Lactochem Fine Crystals and calcium hydrogen phosphate dihydrate Emcompress were used as model fillers. These fillers of similar particle size were selected because of different bonding mechanism and varying course of the compaction process. Fillers were evaluated individually and then in their blends with lubricants magnesium stearate, sodium stearylfumarate and Syloid, i.e. modified colloidal silica in concentration 0,5 and 1 %. Moisture content and flow properties were determined in individual fillers. Particle size distribution, scanning electron microscope pictures and specific surface area measurements were...
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Technological aspects of solid solution formulations
Beneš, Michal ; Doležal, Pavel (advisor) ; Bělohlav, Zdeněk (referee) ; Dohnal, Jiří (referee)
Charles University, Faculty of Pharmacy in Hradec Králové Department of Pharmaceutical Technology Candidate PharmDr. Michal Beneš Supervisor Doc. RNDr. Pavel Doležal, CSc. Title of Doctoral Thesis Technological aspects of solid solution formulations Solid solutions are two- or multicomponent, single phase mixtures of solids, typically consisting of a polymeric carrier and an active substance (API) in amorphous state. The main advantage of solid solutions is the potential to increase the solubility of the API contained. The utilization of solid solutions is however complicated by many factors, which prevents its wider application. These include among other things the difficulty to determine solubility of the API in a polymeric carrier, poor predictability of physical stability as well as the complexity of appropriate selection of manufacturing process and its scalability. The experimental part is divided in three sections all associated with the technology of solid solutions. In the first of them, polymer films containing the API (dabigatran etexilate) were applied on glass plates and evaluated by spectral imaging techniques (infrared and Raman microspectrometry). Samples containing Kollidon VA64, Povidone K30 and Soluplus as polymer carriers, each loaded with 10, 25, 50 and 75 % (w/w) of the API...
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Evaluation of the influence of filler sort and lubricant type and concentration on the parameters of the compaction equation
Ondrejček, Pavel ; Rabišková, Miloslava (advisor) ; Vetchý, David (referee) ; Bělohlav, Zdeněk (referee)
Charles University in Prague, Faculty of Pharmacy in Hradec Králové Department of Department of pharmaceutical technology Candidate Mgr. Pavel Ondrejček Supervisor prof. PharmDr. Miloslava Rabišková, CSc. Title of Doctoral Thesis Evaluation of the influence of filler sort and lubricant type and concentration on the parameters of the compaction equation This thesis is dealing with an evaluation of the compaction process of pharmaceutical excipients and their mixtures. The effect of the filler type, lubricant type and its concentration on the parameters of the compaction equation developed by Assoc. Prof. RNDr. Milan Řehula, CSc. is studied. Microcrystalline cellulose Avicel PH-200, lactose Lactochem Fine Crystals and calcium hydrogen phosphate dihydrate Emcompress were used as model fillers. These fillers of similar particle size were selected because of different bonding mechanism and varying course of the compaction process. Fillers were evaluated individually and then in their blends with lubricants magnesium stearate, sodium stearylfumarate and Syloid, i.e. modified colloidal silica in concentration 0,5 and 1 %. Moisture content and flow properties were determined in individual fillers. Particle size distribution, scanning electron microscope pictures and specific surface area measurements were...
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Evaluation of the influence of filler sort and lubricant type and concentration on the parameters of the compaction equation
Ondrejček, Pavel ; Rabišková, Miloslava (advisor) ; Vetchý, David (referee) ; Bělohlav, Zdeněk (referee)
Charles University in Prague, Faculty of Pharmacy in Hradec Králové Department of Department of pharmaceutical technology Candidate Mgr. Pavel Ondrejček Supervisor prof. PharmDr. Miloslava Rabišková, CSc. Title of Doctoral Thesis Evaluation of the influence of filler sort and lubricant type and concentration on the parameters of the compaction equation This thesis is dealing with an evaluation of the compaction process of pharmaceutical excipients and their mixtures. The effect of the filler type, lubricant type and its concentration on the parameters of the compaction equation developed by Assoc. Prof. RNDr. Milan Řehula, CSc. is studied. Microcrystalline cellulose Avicel PH-200, lactose Lactochem Fine Crystals and calcium hydrogen phosphate dihydrate Emcompress were used as model fillers. These fillers of similar particle size were selected because of different bonding mechanism and varying course of the compaction process. Fillers were evaluated individually and then in their blends with lubricants magnesium stearate, sodium stearylfumarate and Syloid, i.e. modified colloidal silica in concentration 0,5 and 1 %. Moisture content and flow properties were determined in individual fillers. Particle size distribution, scanning electron microscope pictures and specific surface area measurements were...
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