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Comparative study of interaction between surfactant and hyaluronan and different polyelectrolytes.
Stiborský, Filip ; Pravda,, Martin (referee) ; Pekař, Miloslav (advisor)
In this diploma thesis, the interactions between polyelectrolyte and surfactant at low and also at high concentration were studied. There was used pyrene as fluorescent probe during the fluorescence spectroscopy measurement, a cationic surfactant cetyltrimethylammonium bromide and as a main polyelectolyte has been chosen sodium polystyrene sulfonate at 1 MDa molecular size. In the medium containing 0.15 M NaCl we could observed a creation of the complexes – precipitates in the surrounding of CMC concentration and behind of this concentration. In the mixtures containing sodium polystyrene sulfonate and hyaluronan together, there was stronger tend to keep aggregation properties of sodium polystyrene sulfonate during difference concentration ratios. Beyond CMC concentration, hyaluronan starts to influence the aggregation properties of the system as well.
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Micellar interaction in conditions of phase-separated hydrogel
Lokajová, Aneta ; Sedláček, Petr (referee) ; Mravec, Filip (advisor)
The work aims to study the interaction between hyaluronic acid and the surfactant cetyltrimethylammoniumbromide (CTAB) with proper fluorescent method. Hyaluronan is the strong hydrophilic natur polymer which product viscose solutions with water. It can be found in the joints, skin, eyeball in the live organism. It takes places at cancer growth. It is highly used in cosmetics and medicine because it is nontoxic and biodegradabile. It is used as a aqueous agent or the drug delivery. The work aims to study the interaction with the hydrophobic surfactant with attemption to show or disprove the mutual effect. The emission spectra of pyrene were observed by fluorescence method. The pyren was used as a fluorescent probe.
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Study of aggregation in a biopolymer-surfactant system at low surfactant concentration.
Stiborský, Filip ; Vojtová, Lucy (referee) ; Mravec, Filip (advisor)
In this bachelor thesis, the interaction between hyaluronate and surfactant using fluorescent spectroscopy and pyrene as fluorescent probe was studied. A cationic surfactant cetyltrimethylammonium bromide and a native hyaluronate with different molecular size was used. Before a detected critical micelle concentracion, there were no interactions observed in phosphate buffer. However, we could observe electrostatical interactions in the water systém measuring. At low concentration of surfactant (between critical aggregation concentration and critical micelle concentration), the production of gel phase appeared.
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Micellar interaction in conditions of phase-separated hydrogel
Lokajová, Aneta ; Sedláček, Petr (referee) ; Mravec, Filip (advisor)
The work aims to study the interaction between hyaluronic acid and the surfactant cetyltrimethylammoniumbromide (CTAB) with proper fluorescent method. Hyaluronan is the strong hydrophilic natur polymer which product viscose solutions with water. It can be found in the joints, skin, eyeball in the live organism. It takes places at cancer growth. It is highly used in cosmetics and medicine because it is nontoxic and biodegradabile. It is used as a aqueous agent or the drug delivery. The work aims to study the interaction with the hydrophobic surfactant with attemption to show or disprove the mutual effect. The emission spectra of pyrene were observed by fluorescence method. The pyren was used as a fluorescent probe.
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|
|
Comparative study of interaction between surfactant and hyaluronan and different polyelectrolytes.
Stiborský, Filip ; Pravda,, Martin (referee) ; Pekař, Miloslav (advisor)
In this diploma thesis, the interactions between polyelectrolyte and surfactant at low and also at high concentration were studied. There was used pyrene as fluorescent probe during the fluorescence spectroscopy measurement, a cationic surfactant cetyltrimethylammonium bromide and as a main polyelectolyte has been chosen sodium polystyrene sulfonate at 1 MDa molecular size. In the medium containing 0.15 M NaCl we could observed a creation of the complexes – precipitates in the surrounding of CMC concentration and behind of this concentration. In the mixtures containing sodium polystyrene sulfonate and hyaluronan together, there was stronger tend to keep aggregation properties of sodium polystyrene sulfonate during difference concentration ratios. Beyond CMC concentration, hyaluronan starts to influence the aggregation properties of the system as well.
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Study of aggregation in a biopolymer-surfactant system at low surfactant concentration.
Stiborský, Filip ; Vojtová, Lucy (referee) ; Mravec, Filip (advisor)
In this bachelor thesis, the interaction between hyaluronate and surfactant using fluorescent spectroscopy and pyrene as fluorescent probe was studied. A cationic surfactant cetyltrimethylammonium bromide and a native hyaluronate with different molecular size was used. Before a detected critical micelle concentracion, there were no interactions observed in phosphate buffer. However, we could observe electrostatical interactions in the water systém measuring. At low concentration of surfactant (between critical aggregation concentration and critical micelle concentration), the production of gel phase appeared.
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