• Title/Summary/Keyword: 항균력

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Screening for Antimicrobial Activity from Korean Plants (국내산 식물의 항균활성 검색)

  • 최원균;김용성;조규성;성창근
    • The Korean Journal of Food And Nutrition
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    • v.15 no.4
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    • pp.300-306
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    • 2002
  • 141 methanol extracts from 125 plant species which populate in Korea were screened for antimicrobial activity against various food-borne pathogens and food spoilage microorganisms. Those plants were selected from 3 different plant groups: traditional herbs, edible plants and flowers. The methanol extracts were tested by using the disk diffusion assay against five bacteria: Bacillus subtilis, Staphylococcus aureus, Pseudomonas aeruginosa, Enterobacter aerogenes, Escherichia coli. From the evaluation of the inhibition zone diameter of microbial growth, the most significant antimicrobial activity against Bacillus subtilis, Staphylococcus auresus, Pseudomonas aeruginosa, Enterobacter aerogenes, Escherichia coli was observed from the extract of Schizandra chinensis (Turcz.) Baill., Rheum officinale Baill., Schizandra chinensis (Turcz.) Baill., Koelreuteria paniculata Lax and Crataegus pinnatifida Bunge, respectively. The extract from many plants - Koelreuteria paniculata Lax, Chaenomeles sinensis Koehne, Scutellaria bacicalensis Georgi, Castanea crenata Sieb. et Zucc., Rosa centifolia L., Allium fistulosum L. var. giganteum Makino, Crataegus pinnatifida Bunge, Schizandra chinensis (Turcz.) Baill., Lonicera japonica - showed antimicrobial activity all four tested bacteria.

Antimicrobial Activity of the Aerial Part of Artemisia capillaris Extracts on the Food-Borne Pathogens (인진호 추출물의 식중독 세균들에 대한 생육억제 효과)

  • 이종기;서진종
    • Journal of the Korean Society of Food Science and Nutrition
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    • v.32 no.8
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    • pp.1227-1232
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    • 2003
  • The solvent extracts of the aerial part of Artemisia capillaris extracted by using several solvents with different polarities were prepared and their antimicrobial activities were examined. The antimicrobial activities and cell growth inhibitions were investigated to each strain with the different concentrations of the aerial part of Artemisia capillaris Acetone extract showed the highest antimicrobial activity. Minimum inhibitory concentrations (MIC) for each strain were appeared to 20 mg/mL at Staphylococcus aureus and Bacillus subtilis, 40 mg/mL at Vibrio parahaemolyticus, and 80 mg/mL at Salmonella tyhimurium. The cell growth inhibitions were shown on Staphylococcus aureus, Bacillus subtilis, Vibrio parahaemolyticus, and Salmonella typhimurium for 48 hours. The acetone extract was further fractionated sequentially with hexane, chloroform, ethyl acetate, and butanol for purifying crude acetone extract. The solvent fraction of hexane, chloroform, ethyl acetate, and butanol showed the different antimicrobial activity, respectively.

Neutral Electrolyzed Water for Prevention of Dental Caries (기존 구강청결제를 대체할 수 있는 치아우식 예방을 위한 전기분해수)

  • Lee, Kyam
    • Journal of the korean academy of Pediatric Dentistry
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    • v.43 no.3
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    • pp.306-312
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    • 2016
  • Gargle solution has typically been used for the prevention of oral infectious disease such as dental caries and periodontitis. However, the use of most gargle solutions is controversial in application for children because some gargle solutions have harmful side effects. Electrolyzed water is generated by passed an electric current and has antimicrobial activity. The purpose of this study was to investigate and compare the efficacy of electrolyzed water in various conditions for eliminating cariogenic bacteria. Electrolyzed water was generated by a platinum electrode in the presence of sodium chloride at various concentrations. Streptococcus mutans and Streptococcus sobrinus were cultivated into a brain heart infusion broth. After harvesting planktonic bacteria, the pellets were treated with the electrolyzed water and commercial gargle solutions and plated on a mitis-salivarius agar plate. Also, the anti-biofilm activity of the electrolyzed water and commercial gargle solutions was investigated after biofilm formation of S. mutans and S. sobrinus. The bacteria in the biofilm were plated onto a mitis-salivarius agar plate. The plates were incubated, and the colony forming unit was measured. The electrolyzed water containing sodium chloride showed significant antibacterial activity against S. mutans and S. sobrinus as well as some gargle solutions. Furthermore, the electrolyzed water had more disruptive effect on the biofilm of S. mutans and S. sobrinus and killed more bacteria in the biofilm than commercial gargle solutions. The results demonstrate that electrolyzed water may be a useful gargle solution for prevention of dental caries.

An Evaluation of Antibacterial Titanium Surface For Dental Implant (치과용 임플란트 적용을 위한 항균력을 가진 티타늄 표면의 평가)

  • Kang, Min-Kyung;Moon, Seung-Kyun;Kim, Kyoung-Nam
    • Journal of dental hygiene science
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    • v.11 no.5
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    • pp.405-410
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    • 2011
  • The aim of this study was to evaluate antibacterial effect of Cl coated titanium. To coat the Cl on the titanium, first, the titanium was modified by blasting treatment with hydroxyapatite and alumina powder. Anodization process was completed using electrolyte solution of 0.04 M ${\beta}$-glycerol phosphate disodium salt n-hydrate, 0.4 M calcium acetate n-hydrate and 1 M NaCl on the condition of 250 voltages for 3 min. Surface morphology and elements' observation were performed with scanning electron microscopy and energy dispersive spectroscopy and surface profiler was used to analyze the surface roughness. Antibacterial effect was evaluated by film adhesion method. The anodized titanium after blasting showed dimpled surface contained the Cl. Surface average roughness of these surfaces had significantly higher compared to polished titanium. Result of antibacterial test showed that anodized titanium after blasting had an enhanced antibacterial effect compared to the polished titanium. Therefore, these results suggested that titanium contained Cl by anodization after blasting had a rough surface as well as antibacterial effect.

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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Comparision of Anti-microbial Oils as Natural Preservatives (천연방부제로서 항균오일의 항균력 비교)

  • Kim, Mi-Jin;Jung, Taek-Kyu;Hong, In-Gi;Yoon, Kyung-Sup
    • Journal of the Society of Cosmetic Scientists of Korea
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    • v.32 no.2 s.57
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    • pp.99-103
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    • 2006
  • Natural essential oils showed anti-microbial activity on relatively broad spectrum of bacterial and fungal species. These materials had much more intensive anti-microbial activities than synthetic preservatives on C. albicans, A niger, and P. acnes, especially. In the experimental group, anti-microbial activity was order of tea tree oil (from Melaleuca alternifolia) > methylparaben > phytoncide (from Chamaecyparis obtusa). Also, natural essential oils had anti-oxidative and anti-inflammatory effects. These results suggest that natural essential oils can be useful as good cosmetic ingredients such as natural preservatives and anti-oxidants.

Complete genome sequencing of Pseudomonas fluorescens NBC275, a biocontrol agent against fungal pathogens of plants and insects (식물 및 곤충의 곰팡이 병원균에 항균력을 가진 Pseudomonas fluorescens NBC275 균주의 유전체 염기서열)

  • Dutta, Swarnalee;Yu, Sang-Mi;Nagendran, Rajalingam;Jeong, Sang Chul;Lee, Yong Hoon
    • Korean Journal of Microbiology
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    • v.55 no.2
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    • pp.157-159
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    • 2019
  • Pseudomonas fluorescens NBC275 (Pf275) isolated from soil sample collected at riverside of Nakdonggang showed antagonistic activity against fungal pathogens of plants and insects. Here we present complete genome sequence of Pf275. The genome comprises of 6,610,362 bp with GC content of 60.9%, which includes 5,869 predicted protein-coding genes, 16 rRNAs, and 65 tRNAs. Genome analysis revealed gene clusters encoding antimicrobial secondary metabolites such as pyoverdine, 2, 4-diacetylphloroglucinol, and phenazine, which are known to play essential roles in biocontrol of diseases.

Adsorption and Thermostability of Antimicrobial compounds on Water-soluble Silica (수용성 Silica에 대한 항균성물질의 흡착 및 내열성)

  • 김현수;성림식;이인선
    • KSBB Journal
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    • v.17 no.4
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    • pp.345-349
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    • 2002
  • The adsorption of the antimicrobial compounds(AMCs) and their heat-resistance were investigated for the packaging film manufacture, wherein, the antimicrobial compounds were adsorbed on a silica component. The naturally source antimicrobial compounds were produced by methylotropic actinomycetes strains MO-16 and MO-17, extracted with ethylacetate. Antimicrobial compounds adsorbed on water-soluble silica had retained activity against Gram(+) and the Gram(-) bacteria after heat treatment at 150$\^{C}$ for 5min. The benzoic acid showed strong antimicrobial activity to fungi and was stable to heat treatment. The combination of antimicrobial compound plus benzoic acid was synergistic against test strains. Therefore, we estimated that the water-soluble silica is suitable for the packaging film manufacture as a adsorbent of the antimicrobial compounds.

Antimicrobial Activity, Quantification and Bactericidal Activities of Licorice Active Ingredients (감초 성분의 항균활성, 정량 및 방부력에 관한 연구)

  • Kim, Hye Jin;Jang, Ha Na;Bae, Jeong Yun;Ha, Ji Hoon;Park, Soo Nam
    • Microbiology and Biotechnology Letters
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    • v.42 no.4
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    • pp.386-392
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    • 2014
  • The present study was aimed at investigating the antimicrobial activities of licorice's active ingredients. Four samples of licorice ingredients (glycyrrhizin, liquiritin, liquiritigenin, and isoliquiritigenin) were evaluated for their antimicrobial activities against six skin microorganisms. The bioassay applied for determining the antimicrobial effects employed a disc diffusion assay, the minimum inhibitory concentration, and the challenge test. The ingredients showed antibacterial activities. Especially, isoliquiritigenin has significant antimicrobial activities against two Gram-positive (Bacillus subtilis, Propionobacterium acnes) and two Gramnegative (Escherichia coli, Pseudomonas aeruginosa) bacteria. These samples had much higher antimicrobial activities than synthetic preservatives. Our results reveal that liquiritigenin and isoliquiritigenin could be useful compounds for the development of antibacterial agents for the preservation of cosmetics and foods. The two flavonoids, liquiritigenin and isoliquiritigenin, sourced from Korea, China, Uzbekistan, were quantified using HPLC. The results demonstrated that Korean licorice has two flavonoids (liquiritigenin, isoliquiritigenin) in much higher quantities than was observed in the licorice obtained from the two other countries. Thus, isoliquiritigenin and Korean licorice extract represent new candidates for antimicrobial agents.