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Preparation and properties of agarose hydrogel with micellar domains
Sapárová, Alica ; Krouská, Jitka (referee) ; Pekař, Miloslav (advisor)
This diploma thesis was focused on the system of agarose hydrogels with micellar domains. Polysaccharide agarose was used for the preparation of hydrogel matrices. Septonex was chosen as a surfactant. The release of solubilizate from the agarose hydrogel matrix was studied with a hydrophobic dye Sudan III in order to obtain a model system of hydrophobic solubilized drugs. Sudan III was solubilized via surfactant´s micels. Subsequently, this micellar aqueous solution with the dissolved dye was used to prepare the agarose hydrogel. The system was prepared in the environment of deionized water and physiologic solution. The gradual release of the dye into deionized water and physiologic solution was studied for 22 days using the UV-VIS spectrophotometry method. It was found that after 14 days the concentration of the releasing dyes into the deionized water was decreased. The cause is that after 14 and 22 days there was a slight degradation of gels, which was detected using the rheology method. Using the rheology method it was also found that Septonex does not affect the gel formation process.
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Model delivery systems for poorly soluble drugs
Sapárová, Alica ; Holínková, Petra (referee) ; Pilgrová, Tereza (advisor)
The solubilizing capacity of micelle–hyaluronan system was studied using the UV-VIS spectrophotometry method. Septonex was chosen as a surfactant and four molecular weights of hyaluronan were used. Solubilization experiments with a hydrophobic dye Sudan Red G and Sudan III were performed in order to obtain a model system of solubilized drugs, which are also hydrophobic. The system was prepared in the environment of mili-Q water. The influence of the molecular weight of hyaluronan on the solubilizing ability has been studied. It was found that concentration of solubilized dyes increases by increasing concentration of micelles in the system and the molecular weight of hyaluronan affects the solubility of the dyes.
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Preparation and properties of agarose hydrogel with micellar domains
Sapárová, Alica ; Krouská, Jitka (referee) ; Pekař, Miloslav (advisor)
This diploma thesis was focused on the system of agarose hydrogels with micellar domains. Polysaccharide agarose was used for the preparation of hydrogel matrices. Septonex was chosen as a surfactant. The release of solubilizate from the agarose hydrogel matrix was studied with a hydrophobic dye Sudan III in order to obtain a model system of hydrophobic solubilized drugs. Sudan III was solubilized via surfactant´s micels. Subsequently, this micellar aqueous solution with the dissolved dye was used to prepare the agarose hydrogel. The system was prepared in the environment of deionized water and physiologic solution. The gradual release of the dye into deionized water and physiologic solution was studied for 22 days using the UV-VIS spectrophotometry method. It was found that after 14 days the concentration of the releasing dyes into the deionized water was decreased. The cause is that after 14 and 22 days there was a slight degradation of gels, which was detected using the rheology method. Using the rheology method it was also found that Septonex does not affect the gel formation process.
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Model delivery systems for poorly soluble drugs
Sapárová, Alica ; Holínková, Petra (referee) ; Pilgrová, Tereza (advisor)
The solubilizing capacity of micelle–hyaluronan system was studied using the UV-VIS spectrophotometry method. Septonex was chosen as a surfactant and four molecular weights of hyaluronan were used. Solubilization experiments with a hydrophobic dye Sudan Red G and Sudan III were performed in order to obtain a model system of solubilized drugs, which are also hydrophobic. The system was prepared in the environment of mili-Q water. The influence of the molecular weight of hyaluronan on the solubilizing ability has been studied. It was found that concentration of solubilized dyes increases by increasing concentration of micelles in the system and the molecular weight of hyaluronan affects the solubility of the dyes.
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