In this paper, 19 females who use sun protection cosmetics on a daily basis were selected as the research subjects. Relevant data on the selection and use of sun protection cosmetics were obtained by questionnaire sur...In this paper, 19 females who use sun protection cosmetics on a daily basis were selected as the research subjects. Relevant data on the selection and use of sun protection cosmetics were obtained by questionnaire survey and weighing by way of statistical analysis via SPSS16.0 software. Result showed that the SPF of about 80% of the sun protection products used by the surveyed was over 30 and 89.5% of them claimed that they had anti-UVA function. 42.1% of the survey female had chosen the sun protection cosmetics with skin color improvement and concealer function. The analysis results of sun protection cosmetics using parts showed that the main parts used in the study include face (100%), neck (52.6%) and arms (26.3%). According to the sun protection cosmetic dosage in different body parts analysis result, the median of the average dosage only used in face and neck was 0.22 mg/cm2;and that used in many body parts (face, neck, arms and others) was 0.17mg/cm^2. There was no statistical significance in terms of the difference between the two sets (P>0.05). As the dosage analysis result of various types of sun protection cosmetics indicates, the median of the average dosage concerning the sun protection cosmetics only was 0.24 mg/cm2;the median of the average dosage concerning the sun protection cosmetics with beauty function was 0.17 mg/cm^2. There existed statistical significance regarding the difference between the two groups (P<0.05).展开更多
The use of medicinal plants as therapeutic and economic resources has been on the rise in recent years. In Brazil, however, increasing doubt is being cast on the quality of these products, owing to the prevalence of a...The use of medicinal plants as therapeutic and economic resources has been on the rise in recent years. In Brazil, however, increasing doubt is being cast on the quality of these products, owing to the prevalence of adulteration and fraud. Solar radiation can cause serious damage to human skin, as a result, mostly, of ultraviolet light, which is a cause of skin cancer. Photoprotective substances are capable of absorbing, reflecting, or refracting ultraviolet radiation and thus protecting skin from exposure to sunlight. The present study aimed to characterize samples and examine the phytochemical profile and photoprotective potential of bark and leaves of Erythrina velutina Willd. The samples underwent five extraction methods using 80% ethanol. The phenolic content was measured using spectrophotometry. Antioxidant activity was examined using the DPPH and the photoprotective properties of the plant extracts were assessed using the method developed by Mansur. There was a quantitative difference in some groups of metabolites, with higher levels of tannin in the bark and of flavonoids in the leaves. The latter showed greater DPPH free radical scavenging capacity than the bark, although higher levels of SPF were obtained from the bark, with no statistically significant differences between methods. The results indicate that Erythrina velutina Willd. has potential as a photoprotector.展开更多
文摘In this paper, 19 females who use sun protection cosmetics on a daily basis were selected as the research subjects. Relevant data on the selection and use of sun protection cosmetics were obtained by questionnaire survey and weighing by way of statistical analysis via SPSS16.0 software. Result showed that the SPF of about 80% of the sun protection products used by the surveyed was over 30 and 89.5% of them claimed that they had anti-UVA function. 42.1% of the survey female had chosen the sun protection cosmetics with skin color improvement and concealer function. The analysis results of sun protection cosmetics using parts showed that the main parts used in the study include face (100%), neck (52.6%) and arms (26.3%). According to the sun protection cosmetic dosage in different body parts analysis result, the median of the average dosage only used in face and neck was 0.22 mg/cm2;and that used in many body parts (face, neck, arms and others) was 0.17mg/cm^2. There was no statistical significance in terms of the difference between the two sets (P>0.05). As the dosage analysis result of various types of sun protection cosmetics indicates, the median of the average dosage concerning the sun protection cosmetics only was 0.24 mg/cm2;the median of the average dosage concerning the sun protection cosmetics with beauty function was 0.17 mg/cm^2. There existed statistical significance regarding the difference between the two groups (P<0.05).
文摘The use of medicinal plants as therapeutic and economic resources has been on the rise in recent years. In Brazil, however, increasing doubt is being cast on the quality of these products, owing to the prevalence of adulteration and fraud. Solar radiation can cause serious damage to human skin, as a result, mostly, of ultraviolet light, which is a cause of skin cancer. Photoprotective substances are capable of absorbing, reflecting, or refracting ultraviolet radiation and thus protecting skin from exposure to sunlight. The present study aimed to characterize samples and examine the phytochemical profile and photoprotective potential of bark and leaves of Erythrina velutina Willd. The samples underwent five extraction methods using 80% ethanol. The phenolic content was measured using spectrophotometry. Antioxidant activity was examined using the DPPH and the photoprotective properties of the plant extracts were assessed using the method developed by Mansur. There was a quantitative difference in some groups of metabolites, with higher levels of tannin in the bark and of flavonoids in the leaves. The latter showed greater DPPH free radical scavenging capacity than the bark, although higher levels of SPF were obtained from the bark, with no statistically significant differences between methods. The results indicate that Erythrina velutina Willd. has potential as a photoprotector.
