• Journal of Oral Medicine and Pain
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• v.32 no.3
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• pp.273-281
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• 2007

Zinc compounds have been used in various fields - cosmetics, medicine, and dentistry -because of its effective functions to human tissues or organs. Especially, it is well known that zinc has many biologic effects in oral cavity. Zinc ion can affect various oral microorganisms, resulting in reduction of oral bacteria, dental plaque, and dental caries. Also, zinc ion has an ability to reduce amounts of oral anaerobic bacteria and oral VSC and can reduce oral malodor. The author summarized the characteristics and toxicity of zinc, several forms of zinc compounds applied in human tissues, and reviewed biologic effects of Zinc in oral cavity (anti-bacterial effects, anti-plaque effects, anti-caries effects, and anti-VSC effects of zinc). Because of many advantages of zinc in oral cavity, it can be concluded that application of zinc compound to various oral diseases will be extended and activated, and promising.

• Proceedings of the Korean Society of Fisheries Technology Conference
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• 2000.05a
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• pp.447-448
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• 2000

연쇄구균증은 1974년 일본 방어(Seriola quinqueradiata) 양어장에서 처음 발생 보고된 이래 우리 나라에서도 매년 하절기를 중심으로 전국 각지의 양어장에 큰 경제적 손실을 입히는 중요한 어병 세균으로 알려져 있다(Kusuda et al. 1976, Kitao et al. 1979), 본 균의 혈청형에 대해서는 KG7409(Kusuda, 1974) 균주의 항혈청에 대하여 응집 반응을 보이는 균을 KG+, 응집 반응이 일어나지 않는 균주를 KG-로 구분하고 있다. (중략)

• Proceedings of the Korean Society of Fisheries Technology Conference
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• 2001.05a
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• pp.217-219
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• 2001

비브리오균은 현재까지 약 30여종이 알려져 있는 그람음성의 종속영양세균으로, 이 중 12종이 사람에게 질병을 일으킨다고 보고되고 있으며, 우리 나라에서 문제가 종종 발생하는 비브리오균은 패혈증 비브리오, 장염 비브리오 그리고 V.cholerae non-O1을 들 수가 있다. V. cholerae O1과 형태학적, 생화학적, 생물학적 성상은 일치하지만, 콜레라균의 항혈청에는 응집하지 않는 일군의 세균을 V. cholerae non-O1이라고 부른다. (중략)

• Microbiology and Biotechnology Letters
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• v.37 no.3
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• pp.266-272
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• 2009

The annual productions of yam and its aerial bulbils are estimated to 5,000 and 2,500 ton, respectively. But the majority of bulbils had been discarded without specific use. In this study, methanol extract and its organic solvent fractions were prepared from bulbils of Dioscorea batatas Decne, and their antimicrobial, antithrombin, and antioxidant activities were evaluated, respectively. The methanol extract contained 58.98% of water-soluble materials as like yam's extract. But the bulbils's extract contained 12-folds of total polyphenol and 3.4-folds of total flavonoids compared than yam's extract, respectively. For antimicrobial activity the hexane and ethyl acetate fraction showed strong antibacterial activity at $500{\mu}g/disc$ concentration against gram-negative and gram-positive bacteria. Antifungal activity was not observed in any fractions. Strong antithrombin activity was found in the hexane fractions. At 4.8 mg/mL concentration thrombin time (TT) was over 300 sec, which is 4-folds extended than the TT of yam. In a while, the ethyl acetate fraction showed strong DPPH scavenging activity ($IC_{50}$ of $38.1{\mu}g/mL$), SOD-like activity and reducing power, which are comparable to vitamin C or BHT. Our results suggest that the bulbils of yam as yam tuber have useful bio-activities, such as antibacterial, antithrombosis, and antioxidant activity.

• Journal of the Korean Wood Science and Technology
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• v.38 no.4
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• pp.341-348
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• 2010

Antifungal and antibacterial activities of wood vinegars were investigated in this study in order to apply for the natural fungicides and food preservatives. The antifungal activities of wood vinegars were measured as a hyphal growth inhibition rate using four plant pathogenic, four wood rot and one mushroom pathogenic fungi. Inhibition effect on the fungi growth was explicitly observed at the concentrations higher than 0.5% of unrefined wood vinegar and higher than 1.0% of refined wood vinegar, respectively, suggesting that unrefined wood vinegars showed the higher antifungal activities than that of refined wood vinegars. The highest inhibition effect on the fungi growth was shown in Libertella betulina which is a mushroom pathogenic fungus. In addition, the wood vinegars from Pinus densiflora showed the higher antifungal activities against the plant pathogenic and wood rot fungi than that from Quercus spp.. On the other hand, the antibacterial activities of wood vinegars were determined by a paper disc method using the three gram positive and five gram negative bacteria. The unrefined wood vinegars showed a prominent effect on the suppression of bacteria growth at the concentration of 10%, while the suppression of bacteria growth was not observed in the refined wood vinegars. These results also suggest that the unrefined wood vinegars showed the higher antibacterial activities than the refined wood vinegars. The antibacterial activities of wood vinegars against gram positive bacteria were higher than those of wood vinegars against gram negative bacteria. From these results, it can be inferred that the wood vinegars has the strong antimicrobial activities and can be applied as the natural fungicides and food preservatives.

• Korean Journal of Food Science and Technology
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• v.50 no.5
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• pp.535-542
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• 2018

The current study investigated the beneficial effects of 15 essential oils isolated from tree branches, leaves, and flowers. Among these oils, clove bud and Illicium anisatum oils showed the most potent anti-oxidant effects on 1,1-diphenyl-2-picrylhydrazyl and 2,2'azinbis-(3-ethyl-benzothiazoline-6-sulfonic acid) radical scavenging activities. Next, we evaluated the antibacterial effects of 15 essential oils on Staphylococcus aureus, Listeria monocytogenes, Escherichia coli O157:H7, Salmonella typhimurium, and Streptococcus mutans. Clove bud significantly decreased growth of 5 bacterial strains. In addition, clove bud, Magnolia kobus, Picea abies and Chamaecyparis obtuse significantly reduced growth of the fungi, Aspergillus fumigatus, Aspergillus ochraceus, Candida albicans and Trichophyton rubrum. Additionally, clove bud also remarkably reduced the expression of cyclooxygenase-2 and inducible NO synthase in lipopolysaccharide-activated RAW264.7 cells. These results indicate that essential oils isolated from trees, which exhibit antioxidant, antibacterial, antifungal and anti-inflammatory properties, may be potentially useful in the development of cosmetic ingredients.

• Proceedings of the Korean Society of Life Science Conference
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• 2000.09a
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• pp.89-89
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• 2000

• Proceedings of the Plant Resources Society of Korea Conference
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• 2020.08a
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• pp.4-4
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• 2020

본 연구는 경북 제1의 마늘 산지인 영천지역의 마늘과 홍마늘의 특성과 생리활성을 평가하고, 이를 통해 액상스틱 가공제품을 개발하는 것이 그 주요한 목표이다. 영천지역 마늘은 난지형 마늘로 20일, 40일 숙성시킨 홍마늘의 경우 숙성이 진행됨에 따라 당/산 비율이 마늘보다 높아 관능적으로 우수하였다. 뿐만아니라 40일 숙성 홍마늘에서 가장 높은 총 폴리페놀 및 총 플라보노이드 함량을 나타내었으며, 항산화능 역시 가장 우수하였다. 마늘보다 홍마늘의 기능성이 우수하지만 지역 마늘 소비 촉진을 위해 우선적으로 일반마늘을 이용한 가공제품 개발 여구를 진행하였고 부원료로는 지역 생산량이 많은 사과, 포도를 활용하였다. 사과 농축액 첨가 제품과 포도 농축액 첨가 제품에서의 일반 성분분석 결과 2종 모두 우수한 관능성을 나타내어 제품화에 적합하였다. 항세균 및 항진균 활성이 나타나지 않았지만, 항당뇨 활성은 기대하기 어려웠다. 하지만 급성 독성을 나타내지 않은 본 제품은 항산화능에서 모두 우수한 결과를 보여 노화억제, 면역력 증강의 효과가 기대되므로 가공제품으로서의 이용성이 높다고 판단된다.

• Microbiology and Biotechnology Letters
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• v.37 no.2
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• pp.91-98
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• 2009

As consumption of kimchi has increased, factories have begun to produce this traditional Korean fermented vegetable dish on a large scale. Following the rise in manufacturing, the hygienic conditions under which commercial kimchi is being made have become an issue. We isolated 17 coliform bacteria from commercial kimchi that had not been fully fermented. These bacteria were partially identified as one of seven different species from three genera by 16S rDNA sequence analysis as follows: Enterobacter intermedius, Ent. cloacae, Ent. amnigenus, Klebsiella terrigena, K. ornithinolytica, K. oxytoca, and Hafnia alvei. Lactobacillus paraplantarum KNUC25 has been isolated from over-fermented Chinese cabbage kimchi and its antimicrobial activity reported in the literature. In our study, the KNUC25 strain showed antibacterial activity against isolated coliform bacteria and some pathogenic coliform bacteria through spot-on-the-lawn tests and viable cell tests. Through development and use of a cell-free supernatant of L. paraplantarum KNUC25, we effectively controlled coliform bacteria in commercial kimchi.

• Korean Journal of Microbiology
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• v.46 no.2
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• pp.177-182
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• 2010

The bacterial community structure of two marine sponges, Spirastrella abata and Cinachyrella sp. collected from Jeju Island, in April 2009, was analyzed by 16S rDNA-denaturing gradient gel electrophoresis (DGGE). DGGE banding patterns indicated 8 and 7 bands for Spirastrella abata and Cinachyrella sp., respectively. Comparative sequence analysis of variable DGGE bands revealed from 92% to 100% similarity to the known published sequences. The bacterial groups associated with Spirastrella abata were Alphaproteobacteria and Deltaproteobacteria. The bacterial community of Cinachyrella sp. consisted of Alphaproteobacteria, Gammaproteobacteria, and Actinobacteria. Alphaproteobacteria was common and predominant in both the sponge species. Deltaproteobacteria was found only in Spirastrella abata while Actinobacteria and Gammaproteobacteria were found only in Cinachyrella sp. The results revealed that though the common bacterial group was found in both the sponges, the bacterial community profiles differed between the two sponge species obtained from the same geographical location.