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The aim of this work was to evaluate the antioxidant capacity and flavonoids content in 10 commercial cosmetic plant extracts used in cosmetics industry. Antioxidant activity of plant extracts were measured using two methods: FRAP (Ferric Reducing Antioxidant Power) and TEAC (Trolox Equivalent Antioxidant Capacity). The relationship between flavonoids content and antioxidant capacity of plant extracts were checked. As a result of this research it was found that FRAP and TEAC values of plant extracts significantly depend on the flavonoids content. The highest antioxidant activity, both in FRAP and TEAC assays, was observed for arnica flowers, hawthorn flowers and lungwort herb extracts. These extracts can be used as source of natural antioxidants for the prolongation of the oxidative stability of cosmetic products. Additionally, they can replace synthetic antioxidants.
More and more household products and cosmetics containing nanosilver may be found on store shelves. However, the impact of nanosilver has not been fully explored. An analysis of the Polish market of cosmetic products allows us to specify the sources (products) that nanosilver is coming from and the main areas of the environment that can be affected (water, soil, air). To determine this, scenarios for the environmental circulation of cosmetic products with nanosilver have been created. Next, elements of the environment that are potentially exposed to silver particles have been defined, as well as the products they come from. The areas for further research in this field have been also identified.
 Some surfactants widely used as additives in food, pharmaceuticals, and cosmetic formulations are susceptible to peroxidation resulting in accumulation of hydroperoxides (HP). Our investigation was aimed to study the possible influence of different surfactants on the proportionality and reproducibility of the ferrous oxidation-xylenol orange method developed originally for the determination of hydroperoxides. We also attempted to apply this method to determine hydroperoxides produced radiolytically in surfactant molecules. From our preliminary studies we conclude that the method can be applied for determination of hydroperoxides in systems containing non-ionic or anionic surfactants provided careful calibration is performed for each surfactant.
Colchicine treatment was done to obtain the tetraploid forms of chamomile rich in α-bisabolol. The following morphological modifications of organs of chamomile plants were observed i.e.: enlarged, thicken, dark green leaves, wide, accreted, flattened and convex-like inflorescences. 1,0% colchicine in agar gave the most visible, morphological modifications and all new tetraploid strains descended from this combination.
Background. Microbiological purity of cosmetics provides safety of users during their use, prevents physicochemical changes of a preparation, infections and diseases of the skin. Objective. The aim of this study was to assess the level of microbiological contamination of cosmetics used by one person and by several people and cosmetics after their expiry date in relations to standards for marketed cosmetics, ensuring safety of their use. Material and Methods. This study was conducted using 55 samples representing 19 types of cosmetics, divided into three groups: used by one person, used by several people and after the expiry date. In cosmetic samples the general numbers of aerobic mesophilic bacteria were determined with the spread plate method on tryptic-soy agar. The presence of Staphylococcus aureus, Pseudomonas aeruginosa and Candida albicans were also checked. Results. The number of aerobic mesophylic bacteria in the tested cosmetics ranged from the level below the method detectability to 1.3×107 cfu/g or ml. The presence of Staphylococcus spp. was found in 11 (20.0%) tested cosmetic samples and of P. aeruginosa in one tested preparation. Yeasts C. albicans were not detected, whereas contamination with fungi Aspergillus spp. and Penicillium spp. ranging from 0.5×101 to 1.5×101 cfu/g or ml was recorded in four cosmetics. The level of microbiological contamination of cosmetics used by several people was higher than that of cosmetics used by one person. Cosmetics after the expiry date showed the highest microbiological contamination. Conclusions. The number of users of cosmetic and it expiry date exceeding influenced the level of microbial contamination of preparations.
Oceniano przydatność testu wykonywanego na błonie omoczniowo-kosmówkowej zarodka kury do określenia właściwości drażniących kosmetyków.
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