• Journal of Digital Convergence
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• v.14 no.8
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• pp.547-553
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• 2016

This study was conducted to look at the antimicrobial synergistic effect of blended oil into the target skin flora. The essential oils used in antimicrobial test were 100% eucalyptus (EU), lemon (LE), lavender (LA) and four blended oils, EU+LE, LE+LA, EU+LA, and, EU+LE+LA in ratio of 1:1 and 1:1:1 respectively. As a result, LE showed the highest, LA showed the lowest antimicrobial activity among single oil group. In blended oil group, antimicrobial activity of the EU + LA showed significantly increasing effect than the sum of the antimicrobial activity of the single oil. However, the antimicrobial effects of the blend of three oils did not show any synergistic effect. This result showed that the interaction between the chemical components constituting the oil than the number of blended oil seems more significant on the synergistic effect. Therefore, blending essential oil based on scientific evidence becomes more necessary in the future.

• Proceedings of the Korea Contents Association Conference
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• 2017.05a
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• pp.409-410
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• 2017

본 연구는 편백 에션셜 오일을 이용하여 치아우식증과 치주질환을 예방하기 위한 효과적인 구강양치액을 연구개발하고자 수행되었다. Streptococcus mutans에 대한 항미생물 효과 및 치면세균막 형성에 미치는 영향을 실험실연구(in vitro)와 전임상연구(preclinical observations)를 통해 조사하였다. 편백에센셜오일은 실험실 연구결과 S. mutans 성장 억제효과와 항미생물 효과를 보였고, 전임상시험 결과 자원자들의 치면세균막 지수가 감소하였다. 편백 에센셜 오일은 뛰어난 항미생물 효과와 치면세균막 억제를 보이는 것으로 나타났다.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.11 no.3
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• pp.1139-1145
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• 2010

This thesis tried applying Ayurvedic hair and scalp care program and analyzing its effect. Ayurvedic treatment strengthens our immunity through natural healing power. I measured with MIC test and Halo test in order to examine the antibacterial efficacy against colonies which reside in head, when Ayurvedic base oils and essential oils were used on hair and scalp. Finally, I reached the results as follows. I examined the antibacterial efficacy of base oils and essential oils against Bacillus subtilis and Propionibacterium acnes, based on the MIC test with 9 kinds of base oil and 18 kinds of essential oil. By way of experiment, base oils did not show the antibacterial efficacy from all colonies, and in case of essential oils, such as Chamomile, Clary sage, Jasmine, Neroli and Rose oil, the antibacterial efficacy against two colonies did not appear by the measure of below 5%. It turned out that Thyme, Geranium, Lavender and Tea tree had an high effect on two colonies. According to the Halo test which experimented on 7 kinds of bacteria with the essential oils like Geranium, Lavender and Thyme and with the base oils like Sesame and Coconut, it went to prove that base oils was inefficient on antibiosis. It was examined that all of essential oils had the effect on antibiosis from 7 kinds of bacteria. Thyme showed the best efficacy of antibiosis in the MIC and the Halo test.

• Journal of the Korean Society of Fashion and Beauty
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• v.2 no.3 s.3
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• pp.19-26
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• 2004

Synergic antibacterial effects of a sweet flag, essential oils, such as geranium, lemongrass, cypress, chamomile roman, tea tree bergamot, lavender and sandal wood, and the combination of sweet flag and essential oils on Streptococcus aureus, Pseudomonas aeruginosa and Candida albicans were observed in this study. As the results of the tests, the growth of Streptococcus aureus, Pseudomonas aeruginosu and Candida albicans were inhibited in the presence of sweet flag and/or the essential oils. Consequently, the sweet flag and all essential oils was proved to have antibacterial ability, and thus, can be applied to cosmetics.

• Journal of the Society of Cosmetic Scientists of Korea
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• v.37 no.4
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• pp.303-308
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• 2011

Lemon and eucalyptus oils were known to have various biological effects such as anti-aging and sterilizing action. However these essential oils were not well studied about their antioxidant activity and antimicrobial activity against specific skin flora. In this study, we investigated antioxidant activity and antimicrobial activity of lemon and eucalyptus oils by using DPPH radical scavening activity and paper disc method. Lemon oil showed the high DPPH scavenging activity, while eucalyptus oil did not. Blending oils of lemon and eucalyptus had little enhancememt onantioxidant activity. Paper disc method demonstrated that each oil had a high antimicrobial effect against C. albicans and P. acnes in a concentration dependent manner. The blending oils had enhancememt on antimicrobial effect against P. acnes. In conclusion, the blending oil of lemon and eucalyptus can be used as a more effective natural agents for cure of skin trouble and acne.

• Korean Journal of Organic Agriculture
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• v.30 no.3
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• pp.409-422
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• 2022

Southern blight caused by Sclerotium rolfsii is a serious soilborne disease in economically important crops including pepper. In this study, we conducted a selection of antagonistic bacterial strains and organic materials to biologically control the disease. Out of 39 strains isolated from soils at Jinju in Korea, strain JJ2-01 showed the highest mycelial growth inhibition; garlic oil among various organic materials significantly reduced disease incidence and severity. When a combination of strain JJ2-01 and garlic oil, or each was drenched into the pepper plants, combined treatment and garlic oil significantly suppressed the disease development, however, acid phosphatase activity in garlic oil-treated plants decreased. In the case of combined treatment, the soil activities did not affect by treatment, while soil urease activity was significantly increased by the combined treatment. Therefore, given soil quality and health for sustainable agriculture, the combination of strain JJ2-01 and garlic acid was an effective application for environmental-friendly control of Southern blight in pepper plants.

• Journal of the Korean Applied Science and Technology
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• v.39 no.2
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• pp.294-302
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• 2022

This study attempted to investigate the effect of improving damaged hair by preparing a hair improving agent with basil oil and applying it to damaged hair. An experimental material was added to a perm base agent containing 0 g, 3 g, 6 g, 9 g of basil oil to prepare the preparation. It was applied to sample hair bleached at 8 levels with the prepared formulation. Each sample and damaged hair were measured and analyzed. The measurement method measured tensile strength, absorbance and gloss using methylene blue to determine the effect of improving maternal quality. Statistical analysis was conducted on the reliability of the study results. Studies have shown that all samples with basil oil have higher tensile strength than damaged hair. As a result of the absorbance analysis using methylene blue, it was found that the absorbance was lower than that of damaged hair in all samples. Gloss measurement showed that all samples showed increased luster compared to damaged hair. In conclusion, basil oil was found to improve damaged hair. In the future, research on various types of oil and research methods is needed.

• Microbiology and Biotechnology Letters
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• v.49 no.4
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• pp.485-492
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• 2021

In this study, the whitening effect of Abelmoschus esculentus extract was investigated to confirm its applicability in cosmetics. To determine the whitening effect, the tyrosinase-inhibitory activity of Abelmoschus esculentus hot water extract (AEWE) and 70% ethanol extract (AEEE) was measured. At the final concentration of 1000 ㎍/ml, AEWE showed an inhibitory activity of 22.2% and AEEE of 32.8%. To determine the whitening effect at the cellular level, the viability of melanoma cells treated with AEWE and AEEE was evaluated using the MTT assay. At concentrations of 100 ㎍/ml or less, both AEWE- and AEEE-treated groups showed cell survival rates of >95%. Furthermore, in both AEWE- and AEEE-treated melanoma cells, the melanin content decreased in a concentration-dependent manner. The inhibitory effects of AEWE and AEEE used at 5, 10, 50, and 100 ㎍/ml on protein expression were measured by western blot, with β-actin as the positive control. At a concentration of 100 ㎍/ml, AEWE showed an inhibitory effect of 88.1%, 24.8%, 62.2%, and 42.9% on microphthalmia-associated transcription factors (MITF), tyrosinase, tyrosinase-related proteins (TRP)-1, and TRP-2 factors, respectively. At the same concentration, AEEE showed inhibitory effect of 65.3%, 58.3%, 66.2%, and 65.3% against MITF, tyrosinase, TRP-1, and TRP-2 factors, respectively. In conclusion, the whitening effects of AEWE and AEEE were verified, and their applicability as a natural ingredient in cosmetics was confirmed.

• Journal of the Korea Convergence Society
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• v.9 no.7
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• pp.149-154
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• 2018

This article intended to examine the anti-plaque activity of 4 essential oils of Lavender, Tea tree, Eucalyptus, Lemongrass against Streptococcus mutans. In the results of measuring the anti-plaque effect against Streptococcus mutans, Minimum anti-adhesive concentration of Lavender oil was 1.0% and that of Tea tree, Eucalyptus, lemongrass essential oils was 0.5 %. Also, it was confirmed that the essential oils have the effect of inhibiting acid generation by Streptococcus mutans. It was confirmed that pH of the concentration was lowered by the acid generation under the MAC by measuring pH of the solution after incubating Streptococcus mutans and the essential oils in the thermostatic bath varying their concentration. From these results, the essential oils, particularly, Tea tree, Eucalyptus, Lemongrass essential oils are the natural material inhibiting the plaque generation and the potential that they can be used to develop the oral care products was confirmed.

• Journal of the Korean Applied Science and Technology
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• v.38 no.2
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• pp.434-440
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• 2021

This study aimed to understand the effects on the improvement of hair texture by producing a hair texture improvement agent with milk thistle oil, and then applying it to the damaged hair. Each sample before and after application was measured. To understand the effects on the improvement of hair texture, the tensile strength, absorbance with the use of methylene blue, and gloss were measured. In the results of measuring the tensile strength to understand the effects on the improvement of hair texture, In the results of analyzing the absorbance with the use of methylene blue, the value after application was decreased than the value before application. In the results of measuring the gloss, none of the samples showed huge differences. In the results of this study, the milk thistle oil showed the effects on the texture improvement of damaged hair.