• Journal of Adhesion and Interface
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• v.14 no.4
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• pp.197-211
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• 2013

Surfactants which have ability to decrease surface tension through surface activation between the interfaces are used as essential major raw materials for detergents and cosmetics. Typical synthetic detergents such as EO (ethylene oxide), LAB (linear alkylbenzene) are made from chemical surfactant derived from petrochemicals, therefore, they are responsible for major environment contaminations and ecosystem destruction, especially of rivers and also cause atopic dermatitis through strong skin stimulus of these small molecular's powerful permeability and lead to cancers if they get into organs through capillary. Now worldwide interest is increasing to develop new natural surfactants and biosurfactants as ecological, biodegradabl, harmless and multi-functional new amphiphillic materials which replace these synthetic surfactants.

• Journal of the Society of Cosmetic Scientists of Korea
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• v.28 no.1
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• pp.71-79
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• 2002

In the aged skin especially in the face and eyelid, deep and slight wrinkles are one of the remarkable phenomena of aging and the cause of wrinkle is various. Among the cause of wrinkles an oxidative stress plays an important roles in wrinkle formation process. It caused the lipid peroxidation of cell membrane, the increase of the MMPs(MatrixMetalloProteinase) gene expression and cellular DNA damage. These ROS induced materials may cause the degradation of collagen matrix system in the dermis and cause the formation of skin wrinkle. So, it is very important for protecting skin wrinkle formation to regulate ROS activity. In this study, we developed one active ingredient having multi functional activities such as activation of collagen synthesis, inhibition of MMPs activity, lipid peroxidation and free radical scavenging activity and inhibition of free radical induced DNA damage in vitro. Pericarpium castaneae extracts showed collagen synthesis increase in Normal Human Fibroblast and the inhibition of elastase activity (IC$\_$50/ of Elastase: 43.9$\mu\textrm{g}$/㎖). It showed also anti-oxidative activity (IC$\_$50/ : 48$\mu\textrm{g}$/㎖) and free radical scavenging activity(IC$\_$50/: 7.6$\mu\textrm{g}$/㎖). Conclusively, Pericarpium castaneae extracts may be used as an ingredient for new anti-wrinkle cosmetics.

• Journal of Korea Entertainment Industry Association
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• v.14 no.7
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• pp.589-597
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• 2020

The purpose of this study was to verify the acne care improvement effects of natural cosmetics with distilled bamboo vinegar contents and develop the materials for acne cosmetics. For the research subjects, 20 teenage boys and girls were selected and based on random number table, 10 subjects were assigned in the control group that used natural cosmetics (foam cleanser, toner, facial pack) and 10 subjects were assigned in the experimental group that used natural cosmetics with distilled bamboo vinegar contents (foam cleanser, toner, facial pack). The natural cosmetics was used for 12 weeks, and Mark-·Vu facial analysis system was used to measure the sebum, pore size, and redness before using the natural cosmetics, 6 weeks after using the natural cosmetics, and 12 weeks after using the natural cosmetics. For the collected data, SPSS v. 21.0 statistics package program was used for the analysis, and the results are as follows. First, it is a safe natural cosmetics based on the results of the patch test to confirm the skin safety of the natural cosmetics. Second, homogeneity was secured based on the results of the test of homogeneity for the sebum, pore size, and redness of the control group and experimental group. Third, in the verification of acne skin improvement effects of natural cosmetics with distilled bamboo vinegar content, the experimental group had higher reduction rate of changes in the sebum, pore size, and redness on the forehead and right cheek compared to the control group. Therefore, it was identified that the natural cosmetics with distilled bamboo liquid content is safe for the skin and effective for reducing the sebum, pore size, and redness for acne skin. For this reason, it is anticipated for distilled bamboo vinegar to be used in the cosmetics industry.

• Microbiology and Biotechnology Letters
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• v.51 no.2
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• pp.174-183
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• 2023

Various skin diseases are occurring due to external factors such as urbanization and increase in environmental pollution and wearing masks due to COVID-19. Accordingly, various functional cosmetics are being released, but as some side effects are reported, research on functional cosmetics materials using natural plants is necessary. Therefore, in this study, the antioxidant, antibacterial and anti-inflammatory effects of Phyllanthus emblica, Geranium (Pelargonium graveolens), and Commiphora myrrha mixed extracts (PGC) that pharmacological efficacy has been verified were analyzed and their potential as functional cosmetics raw materials was examined. Four extracts (PGC-1~4) were prepared according to the extraction method. ABTS and DPPH radical scavenging activity experiments were conducted for the antioxidant efficacy of the extracts. In addition, paper disc experiments and LPS inflammation-inducing cytokine experiments were conducted to examine the antibacterial and anti-inflammatory effects. In addition, a cell viability test was performed to confirm cytotoxicity. As results of the study, all extracts showed antioxidant, antibacterial, and anti-inflammatory effects without cytotoxicity, and in particular, PGC-4, a fermentation and ultrasonic extract, showed the best efficacy. This means that the extraction yield of useful components varies depending on the extraction method.

• Journal of the Korean Data and Information Science Society
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• v.25 no.6
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• pp.1273-1281
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• 2014

As a variety of industrial technology advances with various materials developed, cosmetics industry in general is witnessing many kinds of new cosmetic products. At the same time, Cosmetics Act becomes effective, and cosmetics ingredient labeling is implemented. Concerns with life pattern such as life management, biorhythm, right posture, and stress symptoms are on the increase in order to seek high-quality life as well. These life patterns are closely connected not only with life quality and health but with skin management, and thus this paper conducts a survey on the connection between functional cosmetics awareness and life pattern. Results show that out of 16 questions concerning cosmetics awareness, responses to question number 3, 5, 6 and 11 have relevant differences among colleges. Furthermore, the results of cross analysis with life pattern show that there are relevant differences between the year of responses and stress symptoms and between the year of responses and right posture. Lastly, it is shown that answers to questions regarding gender and biorhythm, gender and right posture, and gender and stress symptoms are relevantly different. Further research is needed to reveal the differences between college students and ordinary people at large.

• Proceedings of the Materials Research Society of Korea Conference
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• 2001.05a
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• pp.154-154
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• 2001

• Journal of Food Hygiene and Safety
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• v.27 no.3
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• pp.257-263
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• 2012

Cosmetics using natural materials which was purchased in retail stores, distributed in Gyeonggi province(32 samples) and online through internet(24 samples) were analyzed by pesticide residues and target preservatives for assessing the safety of it. Natural or organic certifications was identified in 22 samples among 56 samples and most of them were Ecocert. Pesticide residues was detected in 3 samples among 56 samples and each compound and concentration was permethrin(0.6 mg/kg), tricyclazole(11.7 mg/kg) and malathion(0.05 mg/kg). All of it was purchased through internet. Target preservatives was detected in 13 samples among 56 samples and one of them was over the maximum allowed concentration and the rest of them were within the maximum allowed concentration of the respective preservatives. The compound which was over the maximum allowed concentration was benzoic acid and compounds which were within the maximum allowed concentration were sorbic acid, benzoic acid and methylparaben. They were all identified substances in products and the number of detected preservatives in retail stores were higher than online samples purchased through internet. As a result of this study, The method of analyzing pesticide residues and limit in cosmetics using natural materials should be set up as soon as possible and the monitoring about preservatives in cosmetics using natural materials should be conducted on continuously.

• Journal of the Society of Cosmetic Scientists of Korea
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• v.27 no.1
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• pp.73-81
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• 2001

For an attempt to develop safe materials protecting UV-induced skin damage, plant extracts were evaluated for their antioxidative and free radical scavenging activities. From the results of these screening procedures, the ethanol extract of the flowers of Prunus persica was selected for further study. It was found that Prunus persica (50-200 $\mu\textrm{g}$/㎖) inhibited UVB-induced DNA damage measured by tail moment in the Single Cell Gel Electrophoresis(COMET assay) and inhibited UV-induced lipid peroxidation, expecially against UVB-induced peroxidation at higher than 10 $\mu\textrm{g}$/㎖. Also P.persica(100∼1,000 $\mu\textrm{g}$/㎖) inhibited the amount of $\^$14/C-arachidonic acid metabolites release from UVB-irradiated keratinocytes and it possessed the protective activity against UV-induced cytotoxicity of keratinocytes. All these results indicate that the flowers of P. persica extract may be beneficial for protection UV-induced skin damage when topically applied.

• Journal of the Korean Applied Science and Technology
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• v.14 no.1
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• pp.45-52
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• 1997

It is the problem point of stability for this study to produce cosmetics and to occur in the circulation process, and specially in a case of alcoholic toilet water the precipitation materials to float on content materials has study on the solubility of perfume, and it has practiced in order to examine the problem point whether the raw materials of plastic vessel is or not harmful in content materials. In testing result, A study on stability of alcoholic toilet water is above all the precipitation materials which floats in content materials, and It is appeared by combination ratio to the raw materials of perfume, ethanol, solubilizer and refining water etcs, and in second the alkali degree which has gushed out of glass vessel can understand the thing that the change of PH is largely increased following to the passage of time, and in third the harmful component of content materials out of raw material in plastics vessel must certainly consider a stability and a safety in quality control of products.

• Journal of the Society of Cosmetic Scientists of Korea
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• v.41 no.1
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• pp.27-34
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• 2015

Many applications of nanoparticles have been developed since 1970s. Surface plasmon resonance (SPR) effect can be generated at the surface of nanoparticles by illumination. SPR is the resonant oscillation of conduction electrons at the surface material stimulated by incident light. The collisions between excited electrons and metal atoms can cause the production of thermal energy (photothermal effect). Here, we presented the development of thermo-cosmetics using photothermal effect of gold nanoparticles. Gold nanoparticles (GNPs) were chosen for it's low toxicity. We also and investigated the cell biocompatibility and heating effectiveness for photothermal effect of GNPs. Synthesized GNPs were verified by UV-vis spectrophotometer, where GNP has a characteristic absorbance spectrum. Concentration of GNP was measured by atomic absorption analyzer. The cytotoxicity was confirmed by MTT assay and double staining assay. Photothermal effect of GNP was demonstrated by the thermal increasing properties depending on GNP concentration, which was taken by an IR-thermal camera with a xenon lamp as the light source. If the thermal effect of GNP is applied for thermo-cosmetics, it can supply heat to skin by converting solar energy into thermal energy. Thus, cosmetics containing GNPs can provide benefits to people in the cold region or winter season for maintaining skin temperature, which lead to a positive effect on skin health.