• Archives of Pharmacal Research
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• 제16권2호
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• pp.161-163
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• 1993

In order to evaluate the antimicrobial effect of 2,3-disubstituted-1,4-naphthalenedione derivatives, we synthesized several 2-chloro, 2-bromo and 2-hydroxy-3(substituted)-1, 4-naphthalene-diones (1-25). These derivatives were tested for antifugal and antibacterial activities, in vitro, against Candida albicans 10231 and local, Aspergillus niger KCTC 1231, Tricophyton mentagrophytes KCTC 6085, Baciilus subtilis ACTT 6633, Pseudomonas aeruginsa NCTC 10490, Staphylococcus aureus ATCC 6538P, Escherichia coli NIHJ. The MIC values were determined by the two-fold agar dilution/strea method. Among these derivatives, 4, 5 and 6 showed the potent antifungal activities. Also 5 and 6 had the antibacterial activities. 5 with (1,2,4-triazolyl)-amino moirty was the most effective in preventing the growth of fungi, such as Candida albicans, Aspergillus niger and Tricophyton mentagrophytes.

• Archives of Pharmacal Research
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• 제13권1호
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• pp.14-18
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• 1990

The carbinols, hydrazide, Schiff's bases and acryloyl derivatives of 2-thiobenzethiazole were prepared. The acid and nitrile of 20thiobenzothiazole were also obtained. The derivatives were tested for their antibacterial activities. Some derivatives showed the highest antifungal and activity.

• Journal of Microbiology and Biotechnology
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• 제10권3호
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• pp.394-398
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• 2000

A methanol extract of the root of Peucedanum japonicum, used as a medicinal herb, showed an inhibitory effect on mammalian topoisomerase I activity. The methanol extract was suspended in ethyl acetate, and a topoisomerase I inhibitor in the organic soluble fraction was then isolated by silica gel and thin layer chromatography. The topoisomerase I inhibitory compound was indentified as falcarindiol based on the analysis of EI-MS, $^1$H and \ulcornerC NMR spectroscopy. This inhibitory showed cytotoxicity against human leukemia Jurkat T and HL60 cells with an IC\ulcorner value of 7 $\mu\textrm{g}$/ml. These results suggest the possibility of falcarindiol as a new anticancer agent which can be expected to have a synergistic effect on other anticancer drugs. In addition, the present data show that falcarindiol has antifungal, yet not antibacterial, activity.

• The Plant Pathology Journal
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• 제24권1호
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• pp.63-66
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• 2008

The fermentation broth (FB) of Streptomyces griseofuscus 200401 isolated from non-farming soil showed antagonistic activity against powdery mildew fungus both in melon leaf/seedling assay and in field trials. The FB of S. griseofuscus 200401 was tested at different concentrations. In primary test, the control value of 2-fold diluted FB of S. griseofuscus 200401, compared to control, reached to 82.8%. The protective activity recorded 80.5% in 2-fold dilution of FB. The effect was reduced to 28.9% in high dilution (100-fold) treatment. The curative effect was relatively lower than protective activity. In field test, the antifungal activities of S. griseofuscus 200401 remained low in blocks sprayed with 100-fold diluted FB and the control values were 15.2 and 15.9% in 2005 and 2006, respectively. However, the activities were as high as 65% and 67.3% in the blocks treated with 2-fold dilution of FB during the same period.

• Mycobiology
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• 제47권4호
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• pp.506-511
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• 2019

We investigated the antifungal activities of an endophytic fungus identified as Acaromyces ingoldii, found on a loblolly (Pinus taeda L.) pine bolt in Louisiana during routine laboratory microbial isolations. The specific objectives were to determine the inhibitory properties of A. ingoldii secondary metabolites (crude extract) on the mycelial growth of a brown-rot fungus Gloeophyllum trabeum and a white-rot fungus Trametes versicolor, and to determine the effective concentration of A. ingoldii crude preparation against the two decay fungi in vitro. Results show the crude preparation of A. ingoldii from liquid culture possesses significant mycelial growth inhibitory properties that are concentration dependent against the brownrot and white-rot fungi evaluated. An increase in the concentration of A. ingoldii secondary metabolites significantly decreased the mycelial growth of both wood decay fungi. G. trabeum was more sensitive to the inhibitory effect of the secondary metabolites than T. versicolor. Identification of specific A. ingoldii secondary metabolites, and analysis of their efficacy/specificity warrants further study. Findings from this work may provide the first indication of useful roles for Acaromyces species in a forest environment, and perhaps a future potential in the development of biocontrol-based wood preservation systems.

• The Plant Pathology Journal
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• 제40권2호
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• pp.192-204
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• 2024

In this study, the efficacy of the essential oil of Mentha longifolia, Achillea arabica and Artemisia absinthium plants were evaluated against important soil-borne fungal pathogens as Verticillium dahliae, Rhizoctonia solani, and Fusarium oxysporum. Essential oils were obtained from plants by hydrodistillation method and the chemical components of essential oils were determined by analyzing by gas chromatography-mass spectrometry. The main components found as piperitone oxide (13.61%), piperitenone oxide (15.55%), pulegone (12.47%), 1-menthone (5.75%), and camphor (5.75%) in M. longifolia, á-selinene 13.38%, camphor 13.34%, L-4-terpineneol 8.40%, (-)-á-Elemene 7.01%, 1,8-cineole 4.71%, and (-)-spathulenol 3.84% in A. arabica, and á-thujone (34.64%), 1,8-cineole (19.54%), pulegone (7.86%), camphene (5.31%), sabinene (4.86%), and germacrene-d (3.67%) in A. absinthium. The antifungal activities of the oils were investigated 0.05, 0.1, 0.25, 0.5, 1.00, and 2.00 μl/ml concentrations with the contact effect method. M. longifolia oil (1.00 and 2.00 μl/ml) has displayed remarkable antifungal effect and provided 100% inhibition on mycelial growth of V. dahliae, R. solani and F. oxysporum. The results obtained from this study may contribute to the development of new alternative and safe methods against soil-borne fungal pathogens.

• 농약과학회지
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• 제13권2호
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• pp.63-69
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• 2009

벼 도열병균에 대하여 2-페닐이미노-1,3-티아졸린-4-아세트아닐리드 유도체의 NH수소가 항균력에 미치는 영향을 조사하기 위하여 2-페닐이미노-1,3-티아졸린 골격의 C-4 곁가지에 모르포리닐, 피페리디닐 등의 기능기가 도입된 4-모르포리 닐카르보닐메틸-2-페닐이미노-1,3-티아졸린 2(X=O), 피페리디닐카르보닐메틸-2-페닐이미노-1,3-티아졸린 3(X=C) 등의 새로운 화합물을 합성하였다. 합성된 30종 화합물의 대표적인 식물병원균 6종에 대한 항균력 시험을 수행하였다. 키틴 이합체를 염소로 처리한 다음 생성된 중간체, 아세토아세틸클로라이드의 분리없이 모르폴린 또는 피페리딘과 반응시켜 각각 상응하는 감마-클로로-베타-케토 유도체를 얻었다. 이들을 각각 티오우레아 유도체와 반응시켜 4-모르포리닐카르보닐메틸-2-페닐이미노-1,3-티아졸린 2, 피페리디닐카르보닐메틸-2-페닐이미노-1,3-티아졸린 3을 좋은 수율(27-98%)로 합성하였다. 화합물 3의 벼 도열병원균에 대한 항균력은 피페리디닐기가 C-4 위치에 치환되어 있고 2-페닐이미노기의 페닐기의 ortho 및 para 위치에 불소가 포함된 화합물의 경우(3j)에 가장 높았다 (100 ppm, 90%). 이것으로 미루어보아 2-페닐이미노-1,3-티아졸린 계열의 C-4위치의 치환체는 이 계열 화합물의 벼도열병균에 대한 항균활성을 나타내는데 보조적인 역할을 하는 것으로 생각된다.

• 대한치과보철학회지
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• 제44권3호
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• pp.284-294
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• 2006

Statement of problem. Proliferation of Candida albicans is primarily within the plaque on the fitting surface of the denture rather than on the inflamed mucosa. Consequently, the treatment of the denture is equally important as treatment of the tissue. Cleansing and disinfection should be efficiently carried-out as the organisms can penetrate into the voids of the acrylic resin and grow in them, from which they can continue to infect and reinfect bearing tissues. Purpose. The purpose of this study was to evaluate the applicability of photocatalytic reaction to eliminate Candida albicans from acrylic resin denture base, and to investigate the anti-fungal effect with various UVA illumination time. Materials and Methods. The specimens were cured by the conventional method following the manufacturer's instruction using thermal polymerized denture base resin (Vertex RS: Dentimex, Netherlands). $TiO_2$ photocatalyst sol(LT), which is able to be coated at normal temperature, was made from the Ti-alkoxide progenitor. The XRD patterns, TEM images and nitrogen absorption ability of the $TiO_2$ photocatalyst sol(LT) were compared with the commercial $TiO_2$ photocatalyst P-25. The experimental specimens were coated with the mixture of the $TiO_2$ photocatalyst sol(LT) and binder material (silane) using dip-coater, and uncoated resin plates were used as the control group. Crystallinity of $TiO_2$ of the specimen was tested by the XRD. Size, shape and chemical compositions were also analyzed using the FE-SEM/ EDS. The angle and methylene blue degradation efsciency were measured for evaluating the photocatalytic activity of the $TiO_2$ film. Finally, the antifungal activity of the specimen was tested. Candida albicans KCTC 7629(1 ml, initial concentration $10^5$ cells/ ml) were applied to the experiment and control group specimens and subsequently two UVA light source with 10W, 353 nm peak emission were illuminated to the specimens from 15cm above. The extracted $2{\mu}l$ of sample was plated on nutrient agar plate ($Bacto^{TM}$ Brain Heart Infusion; BD, USA) with 10 minute intervals for 120 minute, respectively. It was incubated for 24 hours at $37^{\circ}C$ and the colony forming units (CFUs) were then counted. Results. Compared the characteristics of LT photocatalyst with commercial P-25 photocatalyst, LT were shown higher activity than P-25. The LT coated experimental specimen surface had anatase crystal form, less than 20 nm of particle size and wide specific surface area. To evaluate the photocatalytic activity of specimens, methylene blue degradation reaction were used and about 5% of degradation rate were measured after 2 hours. The average contact angle was less than $20^{\circ}$ indicating that the LT photocatalyst had hydrophilicity. In the antifungal activity test for Candida albicans, 0% survival rate were measured within 30 minute after irradiation of UVA light. Conclusion. From the results reported above, it is concluded that the UVA-LT photocatalytic reaction have an antifungal effect on the denture surface Candida albicans, and so that could be applicable to the clinical use as a cleaning method.

• 대한화장품학회지
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• 제48권2호
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• pp.135-146
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• 2022

미생물오염을 막아 화장품을 안전하게 사용하기 위해서는 방부력의 확보가 필수적이다. 본 연구에서는, 곰팡이에 대한 방부력이 취약한 수분산 제형의 방부시스템을 개선하여 항진균효과를 확인하고 다양한 방부시스템을 정립하여 진균에 대한 보존력을 강화하고자 하였다. 하이드록시기를 갖는 벤젠고리 구조를 가지며 화장품 제형 내에서 protonated form으로 존재해 항진균력을 향상시킬 것으로 예상되는 물질 5 종 아니스산나트륨, p-아니스산, 카프릴하이드록삼산, o-시멘-5-올, 하이드록시아세토페논을 선정하였고 minimal inhibitory concentration (MIC) assay를 통해 원료의 최소생육 저해농도를 확인하였다. 곰팡이에 대한 항균력을 보인 원료를 방부시스템에 추가한 수분산 제형에 대해 방부력테스트를 하여 곰팡이에 대한 방부력이 향상됨을 확인하였다. p-아니스산을 사용한 경우, 4 가지 제형 모두에서 세균과 효모균에 대한 방부력 저해 효과 없이 곰팡이에 대한 방부력이 강화되는 것을 확인하였다.

• 한국유기농업학회지
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• 제24권1호
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• pp.61-71
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• 2016

본 연구에서는 흑타리버섯을 물, 에틸아세테이트, 클로로포름, 부탄올 등으로 추출하였다. 각 유기용매를 이용한 흑타리버섯 추출물의 항균 활성을 1차적으로 평판 확산방법을 사용하여 항균력을 검증하였다. 부탄올 추출물에서 가장 높은 항균력을 확인하였고, 1%, 2.5%, 5%, 7.5%, 10% 농도로 항균력을 확인하였을 때도 부탄올 추출물이 가장 높은 항균활성을 확인하였다. 위의 결과를 통해 실제 포장실험에서도 가능성을 확인하여 온실에서 F. fujikuroi Nirenberg의 억제력을 확인해본 결과 흑타리버섯 부탄올 추출물을 7.5% 첨가하였을 때 .80%의 높은 억제력을 확인할 수 있었다. 또한 초기의 발아력과 파종 후 30일 경과 후에 확인한 초기 생육특성에서도 흑타리버섯 추출물의 5% 이상에서는 방제에 효과가 높았으며 7.5% 이상 시에는 초장 및 묘소질이 대조구와 비교하여 통계적 유의차가 없는 높은 방제효과를 확인할 수 있었고 이러한 결과로 볼 때 흑타리버섯 추출물은 벼 키다리병에 대하여 높은 방제효과가 있으며 향후에는 친환경 종자소독제로써 활용가능성이 높을 것으로 판단된다.