In JoVE (1)
Articles by Pavlína Egner in JoVE
Preparation of Keratin Hydrolysate from Chicken Feathers and Its Application in Cosmetics Pavel Mokrejš1, Matouš Huťťa1, Jana Pavlačková2, Pavlína Egner2 1Department of Polymer Engineering, Faculty of Technology, Tomas Bata University in Zlín, 2Department of Fat, Tenside and Cosmetics Technology, Faculty of Technology, Tomas Bata University in Zlín The goal of the protocol is to prepare keratin hydrolysate from chicken feathers by alkaline-enzymatic hydrolysis and to test whether adding keratin hydrolysate into a cosmetics ointment base improves skin barrier function (heightening hydration and diminishing transepidermal water loss). Tests are conducted on men and woman volunteers.
Other articles by Pavlína Egner on PubMed
The Cosmetic and Dermatological Potential of Keratin Hydrolysate Journal of Cosmetic Dermatology. | Pubmed ID: 28164425 Although keratin hydrolysates have become established as standard components in hair and nail cosmetics, studies on the moisturizing effects of keratin hydrolysates do not appear among contemporary literature.
Comparison of Metrological Techniques for Evaluation of the Impact of a Cosmetic Product Containing Hyaluronic Acid on the Properties of Skin Surface Biointerphases. | Pubmed ID: 28614949 The aim of this research was to evaluate mutual interchangeability of four principally different biometric instrumental techniques designed for objective measurement of changes in the physical, mechanical, and topographical properties of the skin surface treated with commercial antiaging cosmetic products with hyaluronic acid. The following instrumental devices were used: Visioscope PC 35, Corneometer Multiprobe Adapter MPA 6, Reviscometer RVM 600, and 3D scanner Talysurf CLI 500. The comparison of the individual methods was performed using cluster analysis. The study involved 25 female volunteers aged 40-65. Measurements were taken before and after 30 daily in vivo applications of an antiaging preparation to the skin surface in the periorbital area. A slight reduction in skin surface roughness was recorded in 55% of the volunteers. On the contrary, a worsening from their initial states was detected in 25% of the subjects, while for 20%, no significant change was reported. Cluster analysis confirmed that the mentioned methodologies can be divided into two basic clusters, namely, a cluster of methods recording the changes in skin relief by means of optical techniques, and a cluster of methods investigating changes in hydration and anisotropy. In practice, the techniques in different clusters are not interchangeable and should be assessed separately.