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Stability evaluation of cosmetic dispersions using centrifugal analyser
Procházková, Michaela ; Krouská, Jitka (referee) ; Pekař, Miloslav (advisor)
This bachelor thesis is focused on the evaluation of stability of cosmetics emulsions prepared from ingredients commonly available in laboratory and compared to the stability of commercially available body lotions. In the theoretical part cosmetics emulsion and methods used to stability measurements were described. Experimental part of this work at first describes the preparation of the emulsions. Furthermore, the stability of prepared emulsion was compared to commercially available ones using the centrifugal analyser LUMiSizer. In conclusion, the test results obtained from analyser LUMiSizer have showed the stability of the commercial emulsions and two prepared samples.
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Monitoring of the influence of selected synthetic preservatives on the stability of cosmetic emulsions O/W
Holubová, Anna ; Vítová, Eva (referee) ; Zemanová, Jana (advisor)
This bachelor’s thesis collects available information on commercially supplied cosmetic preservatives Sensiva PA 20 (ingredients by INCI: phenethyl alcohol, ethylhexylglycerin), Euxyl K 900 (ingredients by INCI: benzyl alcohol, ethylhexylglycerin, tocopherol) and Euxyl PE 9010 (ingredients by INCI: phenoxyethanol, ethylhexylglycerin) from German company Schülke & Mayr, especially with regard to the assessment of their potential influence on the stability of cosmetic emulsion O/W. Subsequently, based on the literature review, selected methods were applied, their combination may prospectively serves to required evaluation of the influence on the stability of studied preservation systems.
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Stability evaluation of cosmetic dispersions using centrifugal analyser
Procházková, Michaela ; Krouská, Jitka (referee) ; Pekař, Miloslav (advisor)
This bachelor thesis is focused on the evaluation of stability of cosmetics emulsions prepared from ingredients commonly available in laboratory and compared to the stability of commercially available body lotions. In the theoretical part cosmetics emulsion and methods used to stability measurements were described. Experimental part of this work at first describes the preparation of the emulsions. Furthermore, the stability of prepared emulsion was compared to commercially available ones using the centrifugal analyser LUMiSizer. In conclusion, the test results obtained from analyser LUMiSizer have showed the stability of the commercial emulsions and two prepared samples.
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Monitoring of the influence of selected synthetic preservatives on the stability of cosmetic emulsions O/W
Holubová, Anna ; Vítová, Eva (referee) ; Zemanová, Jana (advisor)
This bachelor’s thesis collects available information on commercially supplied cosmetic preservatives Sensiva PA 20 (ingredients by INCI: phenethyl alcohol, ethylhexylglycerin), Euxyl K 900 (ingredients by INCI: benzyl alcohol, ethylhexylglycerin, tocopherol) and Euxyl PE 9010 (ingredients by INCI: phenoxyethanol, ethylhexylglycerin) from German company Schülke & Mayr, especially with regard to the assessment of their potential influence on the stability of cosmetic emulsion O/W. Subsequently, based on the literature review, selected methods were applied, their combination may prospectively serves to required evaluation of the influence on the stability of studied preservation systems.
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