• Title, Summary, Keyword: Tea Tree

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Antimicrobial Activity of Tea Tree Oil against Pathogens relate to Acne (Tea Tree Oil의 여드름균에 대한 항균활성)

  • Seol, Jae-Won;Song, Kun-Ho;Lee, Kwang-Rae
    • Journal of Industrial Technology
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    • v.31 no.B
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    • pp.113-117
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    • 2011
  • The purpose of this study is to determine the antimicrobial effect of tea tree oil a against pathogens relate to acne. Tea tree oil extracted from Australian Melaleuca alterifolia has been studied extensively for their antimicrobial properties against different type of bacteria and fungi. Tea tree oil has been reported to have antibacterial, antiinflammatory and antitumor activities, among others. By evaluating the antibacterial effect of Tea Tree Oil of Australia, the MIC value of Tea Tree oil against P. acnes was 0.05% and 0.5% against aerobic bacteria. This study showed that Tea Tree Oil has antibacterial effect against bacteria which induce acne. Tea Tree Oil had better antibacterial effect against P. acnes compared to aerobic bacteria. It is promising to develop a nature-based functional material for makeup product, which can cure and prevent acne.

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Antibacterial effect of tea tree on Streptococcus mutans (Streptococcus mutans에 대한 티트리의 항균 효과)

  • Choi, Yu-Ri;Kang, Min-Kyung
    • Journal of Korean society of Dental Hygiene
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    • v.17 no.4
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    • pp.613-620
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    • 2017
  • Objectives: The purpose of this study is to investigate the antibacterial effect of Streptococcus mutans of tea tree ingredient. Methods: The experimental groups were each given with different concentrations (30 or 50 vol%) of tea tree prepared in saline solution. The control group applied only saline solution. The tea tree coating of the specimen were examined under a scanning electron microscope. For the antibacterial activity test of the tea tree, the contact angle of the tea tree- coated specimen's surface was analyzed. The antibacterial effect against Streptococcus mutans was determined by counting the colony forming units (CFU). The statical statics were evaluated by using one-way ANOVA and paired t-test. Results: The tea tree treated group of hydrophilic more than non treated group. Antibacterial experiments demonstrated that tee tree solution was effective against Streptococcus mutans. However there was no significant difference in depending solution concentration groups. Conclusions: The antimicrobial activity of the tea tree containing solution showed its potential for use as coating for denture and medical materials.

I. Anthracnose of Tea Tree Caused by Collectotrichum theae-sinensis (차나무의 병해 I. Collectotirchum theae-sinensis에 의한 차 탄저병)

  • 박서기
    • Plant Disease and Agriculture
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    • v.1 no.2
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    • pp.26-28
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    • 1995
  • Anthracnose of tea tree, Camellia sinensis, occurred severely at tea plantation of Boseung, Chonnam. Irregular, dark brown spots appeared on tips and margins of mature leaves in early stage. As the disease progresses, the lesions were covered with numerous, small, black, slightly raised pustules (acervuli). The causal fungus of anthracnose was identified as Colletotrichum theae-sinensis (Miyake) Yamamoto. Symptoms by C. theae-sinensis appeared around 20 days after artificial inoculation.

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Insecticidal Activity of Essential Oils against Whitegrub (식물정유의 굼벵이에 대한 살충활성)

  • Lee, Dong Gon;Jung, Young Hak;Choi, Dae Hong;Choi, Sung Hwan;Choo, Ho Yul;Lee, Dong Woon
    • Weed & Turfgrass Science
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    • v.4 no.2
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    • pp.129-134
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    • 2015
  • White grub damages various crops, trees and they can also be one of the most serious pests of turf grass in golf courses. This study was conducted to determine the biocontrol of white grubs with 18 different kinds (anise, camphor, castor, cinnamon, clove oil, citronella, fennel, geranium, lavender, lemongrass, linseed, neem, peppermint, pine, rosemary, tea-tree, thyme, and turpentine) of plant essential oils in laboratory, green house and field. Anise oil (88.9%), linseed oil (100%), and tea-tree oil (88.9%) were highly effective among tested essential oils against 3rd instar of Bifurcanmala aulax in cap vial experiment. However, anise and linseed oils showed low mortality against $3^{rd}$ instar of Popillia japonica in pot greenhouse experiment. Efficacy of anise, linseed oil, and tea-tree was also different depending on target white grub in field trials. Correlated mortality showed 32.6% only in tea-tree oil treatment against pupae of Adoretus tenuimaculatus however, correlated mortality of anise, linseed and tea-tree oil were 54.8, 51.6 and 56.5% respectively against $3^{rd}$ instar of Exomala orientalis in the field trial in Adelscott Country Club in Hapcheon, Gyeongnam province.

Diseases of Tea Trees II. White Scab of Tea Tree Caused by Sphaceloma theae (차나무의 병해 II. Sphaceloma theae에 의한 차 흰별무늬병)

  • 박서기
    • Korean Journal Plant Pathology
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    • v.11 no.4
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    • pp.383-385
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    • 1995
  • Occurrence of white scab of tea (CAmellia sinensis) showing numerous, small, circular, reddish or yellowish brown spots on young tea leaves was observed at a tea plantation of Boseung, Chonnam, from May to June in 1992-1994. At the late growth stages, the center of the spot became light gray. The causal fungus of the white scab was identified as Sphaceloma theae Kurosawa. Symptoms were produced 5∼6 days after inoculation by the artificial inoculation of s. theae conidia, which was similar to those on naturally infected leaves.

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Influence of Mineral Salts on Shoot Growth and Metabolite Biosynthesis in Tea Tree (Camellia sinensis L.)

  • Kim, Yong Duck;Yun, Jae Gill;Seo, Yeong Rong;Karigar, Chandrakant S.;Choi, Myung Suk
    • Horticultural Science & Technology
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    • v.33 no.1
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    • pp.106-113
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    • 2015
  • Effects of mineral salts (N, P, K, $Ca^{2+}$, $Mg^{2+}$, and $Fe^{3+}$) on the shoot growth and metabolite production of tea tree were studied using in vitro culture techniques. Among mineral s alts, ${H_2PO_4}^-$ was the most important for enhanced growth rate of tea tree, while $Mg^{2+}$ and $Ca^{2+}$ did not affect plant growth. Removal of ${NH_4}^+$ and $NO_3$ from the culture medium enhanced shoot multiplication compared to other treatments. Metabolite production was variable depending on mineral types and concentration. Removal of $Ca^{2+}$ decreased the production of caffeine; however, other treatments did not influence its production. $Ca^{2+}$, ${NH_4}^+$ and $Fe^{3+}$ were important factors for catechin production in tea tree. These results can be used as the basis for development of technical soil controls suitable for tea tree cultivation in the future.

Antimicrobial Activity of Bamboo(Phyllostachys bambusoides) Essential Oil (대나무 기름의 항균효과)

  • 이숙경
    • Journal of Food Hygiene and Safety
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    • v.15 no.1
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    • pp.55-59
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    • 2000
  • In order to develop a antimicrobial agent, dried bamboo trunk was extracted by high temperature suction and then antimicrobial activities against Staphylococcus aureus ATCC 2825 and Escherichia coli DH 5$\alpha$ were investigated as compared with tea tree oil and BHA. The minimal inhibitory concentrationo(MIC) of the extracted substance against microorganisms were also examined. The results are as follows: 1. By disc diffusion method, BHA showed the strongest antimicrobial activity on Gram-positive bacteria such as S. aureus ATCC 2825 but bamboo essential oil showed the strongest antimicrobial activity on Gram-negative bacteria such as E. coli DH 5$\alpha$. 2. By broth dilution method, the minimum inhibitory concentration of the BHA, tea tree oil and bamboo oil were not detected against S. aureus ATCC 2825(MIC, 6.0 $\mu$l/ ml) and E. coli DH 5$\alpha$(MIC, 6.0 $\mu$l/ ml)

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Management of Earthworm Casts using Pesticides and Tea Tree (Camellia oliefera) Extracts in Turfgrass of Golf Courses (골프장에서 차나무류 추출물과 화학 방제제를 이용한 지렁이 분변토 발생 관리)

  • Shin, Chong Chang;Kim, Jong Kyung;Choi, Sung Hwan;Jeon, Byungduk;Lee, Dong Woon
    • Weed & Turfgrass Science
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    • v.5 no.1
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    • pp.35-41
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    • 2016
  • Earthworm cast is a harmful factor which reduces the uniformity of management of turfgrass and play quality in golf courses and playground. This research was conducted to carry out the efficacy of some pesticide (bifenthrin GR + clothianidin GR, ethoprophos GR, imidacloprid SC, picoxystrobin WG, thiophanate-methyl WP) and tee tree (Camellia oliefera) extracts against reducing earthworm cast in golf courses. All tested materials were acted reducing earthworm cast, thiophanate-methyl among them showed the highest effect reducing earthworm casts in golf courses. Tea tree extracts was occurred similar efficacy among tested chemical pesticides. However, pellet type byproduct of tea seed extract and liquid formulation of tea tree extract were better than granule formulation of them. Byproduct of tea seed and tea tree extract can be used for alternative biological management material for reducing earthworm cast in heavily casting occurrence area.

Synergy Effect of Chlorhexidine and Essential Oils on Antimicrobial Activity in Dental Impression Materials (치과용 인상재에서의 클로르헥시딘과 에센셜 오일의 항균성능에 대한 상승효과)

  • Lee, Kwang-Rae
    • Korean Chemical Engineering Research
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    • v.56 no.2
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    • pp.240-244
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    • 2018
  • There is growing concern about cross infection among the patients to patients, patients to staffs, and tools to patients in healthcare facilities, especially in dentistry. In this study, the most widely used dental impression materials were prepared and the synergy effect of Chlorhexidine and essential oil on antimicrobial activity was examined in the impression materials. Chlorhexidine concentration of 0.1 wt% and 0.5 wt% showed no antimicrobial activity on Escherichia coli (E. coli) and Candida albicans. At 1.0 wt% Chlorhexidine, 0% of E. coli and 34.7% of Candida albicans were survived. Bergamot (Essential oil) concentration of 0.5 wt% and 1.0 wt% showed no antimicrobial activity on E. coli. At 2.0 wt% Bergamot oil, 71.9% of E. coli were survived. Tea tree oil (Essential oil) of 0.5 wt% showed no antimicrobial activity on E. coli. At 1.0 wt% Tea tree oil, 11.2% of E. coli was survived. At 2.0 wt% Tea tree oil, no E. coli was survived. However, no E. coli was survived at the concentration of 0.8 wt% Bergamot with 0.3 wt% Chlorhexidine. At the concentration of 0.8 wt% Tea Tree oil with 0.3 wt% Chlorhexidine, 1.3% of E. coli were survived. The experimental results showed that the synergy effects between Chlorhexidine and essential oils on antimicrobial activity were prominent.

Antibacterial Activity of Essential Oils on the Growth of Staphylococcus aureus and Measurement of their Binding Interaction Using Optical Biosensor

  • Chung, Kyong-Hwan;Yang, Ki-Sook;Kim, Jin;Kim, Jin-Chul;Lee, Ki-Young
    • Journal of Microbiology and Biotechnology
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    • v.17 no.11
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    • pp.1848-1855
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    • 2007
  • Antibacterial activity of essential oils (Tea tree, Chamomile, Eucalyptus) on Staphylococcus aureus growth was evaluated as well as the essential oil-loaded alginate beads. The binding interactions between the cell and the essential oils were measured using an optical biosensor. The antibacterial activity of the essential oils to the cell was evaluated with their binding interaction and affinity. The antibacterial activity appeared in the order of Tea Tree>Chamomile>Eucalyptus, in comparison of the inhibition effects of the cell growth to the essential oils. The association rate constant and affinity of the cell binding on Tea Tree essential oil were $5.0{\times}10^{-13}\;ml/(CFU{\cdot}s)$ and $5.0{\times}10^5\;ml/CFU$, respectively. The affinity of the cell binding on Tea Tree was about twice higher than those on the other essential oils. It might be possible that an effective antibacterial activity of Tea Tree essential oil was derived from its strong adhesive ability to the cell, more so than those of the other essential oils.