• Journal of Ginseng Research
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• 제22권2호
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• pp.122-125
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• 1998

Adequate available soil moisture level is considered to be one the most important components in growing high yields of good quality ginseng. Excessive soil moisture may promote stillborn fungal pathogens and cause serious diseases in ginseng fields. This study showed that soil moisture levels for optimum growth and health of ginseng varied with soil texture. Fifty- percent available moisture for sandy loam and 75% for silty loam are the best moisture levels for good growth and higher yield.

• 한국생물공학회:학술대회논문집
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• 한국생물공학회 2005년도 생물공학의 동향(XVI)
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• pp.309-310
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• 2005

Bioconverted linolenic acid (bLNA) obtained from linolenic acid by Pseudomonas aeruginosa PR3, showed anti-fungal activity against plant pathogens such as B. cinerea, F. oxysporum, F. solani, P. capsici and C. capsici. The oil sample also showed anti-fungal activity with MIC values, ranging from >250 to >1,000 ${\mu}g/ml$. Varied concentrations of bLNA had a great potential effect on spore germination of different fungi.

• Journal of Nutrition and Health
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• 제35권9호
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• pp.926-931
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• 2002

The antimicrobial properties of extracts of Prunus mume were tested on Salmonella paratyphimurium and S. typhimurium. First, the Prumus mume was extracted with methanol at several temperatures, and then fractionation of the methanol extracts from Prunus mume was carried out by using petroleum ether, chloroform, ethyl acetate or butanol. Secondly, absorption column chromatoraphy (using a Diaion HP 20) was conducted to eliminate some water soluble materials that might inhibit the antimicrobial activity of some extracts. The antimicrobial activitry of each of the Prunus mume extracts was determined using a paper disc method against several food-borne pathogens, The growth inhibition curve was determine using butanol extracts of Prunus mume against Salmonella typhimurium. The extraction temperature did not have any significant effect on the yield of the extract or on the level of antimicrobial activity. The butanol extract of Prunus mume showed strong antimicrobial activity against Salmonella paratyphimurium and S. typhimurium; a 1,000 ppm of butanol extract of Prunus mume retared the growth of S. typhimurium up to 36 hours. (Korean J Nutrition 35(9) : 926~931, 2002)

• 식품기술
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• 제18권1호
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• pp.91-98
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• 2005

Aims: As a preliminary experiment on new sanitizer delivery tools, the efficacy of aerosolizedsanitizer on foodborne pathogens was investigated in larger model chamber system.Methods: Peroxyacetic acid and hydrogen peroxide were aerosolized in a model system againstartificially inoculated target microorganisms on laboratory media. Cultures of 4 different foodborne pathogens were inoculated and affixed onto 3 different heights (bottom, wall, and ceiling), and 3different orientations (face-down, vertical, and face-down) inside a commercial semi-trailer cabinet(14.6 x 2.6 x 2.8 m). Sanitizer was aerosolized into 2 m droplet size fog and treated for 1 h atambient temperature.Results: Populations of Bacillus cereus, Listeria innocua, Staphylococcus aureus, and Salmonellatyphimurium were reduced by an average of 3.09, 7.69, 6.93 and 8.18 log units per plate, respectively.Interestingly, L. innocua, Staph. aureus, and Salm. typhimurium showed statistically not different (P$\leq$ 0.05) reduction patterns relative to height and orientation that were never expected in a sprayingsystemConclusion and significance: Aerosolized sanitizers diffuse like gaseous sanitizers, so it has greatpotential for use in commercial applications.

• Fisheries and Aquatic Sciences
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• 제16권4호
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• pp.229-235
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• 2013

In an effort to develop biopolymer-based antioxidant and antibacterial materials, a chitosan-phloroglucinol conjugate was prepared and cellular antioxidant activity and minimum inhibitory concentration against foodborne pathogens and methicillin-resistant Staphylococcus aureus (MRSA) evaluated. The chitosan-phloroglucinol conjugate showed higher antioxidant activities than the unmodified chitosan (P < 0.05). The chitosan-phloroglucinol conjugate showed 62.29% reactive oxygen species scavenging activity, 56.11% lipid peroxidation inhibition activity, and 2.21-fold increase of glutathione expression in mouse macrophage cells. Additionally, the chitosan-phloroglucinol conjugate exhibited higher antibacterial activities than the unmodified chitosan, and the chitosan-phloroglucinol conjugate showed fourfold higher antibacterial activities against MRSA and clinical isolates and twofold higher activities against foodborne pathogens compared to the unmodified chitosan.

• 한국축산식품학회지
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• 제23권4호
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• pp.361-375
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• 2003

In this study, significant factors influencing on the quality and stability of fermented sausage, such as materials, processing conditions, and microbiological characteristics as well as topography during ripening, were documented. Since most fermented sausages are not heated during manufacture or before consumption, a strict control of the growth of pathogens and the selection of favourable conditions that encourage the specific growth and development of desirable microflora are particularly important. With respect to microbiological safety, hurdles, i.e., preservations(nitrite), redox potential, competitive flora, acidity(pH), and water activity($a_{w}$) are matters of importance to prevent proliferation of bacterial pathogens. Today, for ensuring the safety and quality of the final product, the application of starter cultures in combination with the proper processing is subsequently used in practice. For improving the efficiency of microbiological utility in the production of fermented sausages, the understanding of their topography is essential. The documented different points must be taken into account when HACCP systems set up for the manufacture of fermented sausages. There are continuous researches concerning desirable improvements to sausage fermentation with health enhancing properties.

• 한국식품영양과학회지
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• 제27권2호
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• pp.239-243
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• 1998

The growth of pathogens such as Staphylococcus aureus ATCC 29737, Bacillus subtilis KCTC 1021 and Escherichia coli ATCC 11775 was inhibited as much as 1 to 4 log cycles in tryptic soy broth containing 1% of Schizandra chinensis extract but Salmonella tuphimrium ATCC 14028 and Vibrio parahaemolyticus ATCC 17802 were not inhibited. The essential oil of Schizandra chinensis showed stronger inhibitory activity than ethanol extract against above menioned pathogens. The growth of Listeria monocytogenes was not changed in minced pork containing 1% of Schizandra chinensis extract for 12 days at 4$^{\circ}C$. The sensory quality of hamburger patty such as taste, flavor and overall accepability were not decreased by the addition of 1% Schizandra chinensis extract(p<0.05).

• International Journal of Oral Biology
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• 제43권4호
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• pp.193-200
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• 2018

The purpose of this study is to determine if natural extracts could be used as an additive in oral health food made with Weissella cibaria CMU (oraCMU). Natural extracts of green tea, mulberry leaf, licorice, and propolis, which are reported to have antimicrobial activities, were selected and used in this study. The minimum inhibitory concentrations (MIC) of extracts on periodontal pathogens such as Fusobacterium nucleatum and Porphyromonas gingivalis and their synergy effects with oraCMU by the fractional inhibitory concentrations methods were measured. From the results obtained, all the extracts showed no effect on the growth of oraCMU. Green tea extract showed the best antibacterial activity with MIC of 1.8 mg/ml against both F. nucleatum and P. gingivalis. In addition, green tea extract had a synergistic effect with oraCMU against F. nucleatum. Therefore, these results suggested that green tea extract is available as an additive in oral health food made with oraCMU.

• 한국식품영양학회지
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• 제10권4호
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• pp.559-563
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• 1997

장내유해세균에 대한 세균성 장내질환치료와 관련된 한약재의 항균활성 검색을 통해 우수한 효과가 인정된 가자를 선정하고 혐기적 broth system에서 각 용매별 분획물의 6종의 장내유해세균에 대한 항균활성을 측정하였으며 그 항균물질을 column chromatography 법에 의해 부분 정제하였다. 가자 메탄올 추출물은 100-2,000g/ml 농도에서 시험균 Eubacterium limosum ATCC 10825, Escherichia coli ATCC 25922, Bacteroides fragilis KCTC 5013, Clostridium perfringens ATCC 3627, Staphylococcus aureus KFCC 11764 및 Salmonella typhimurium ATCC 14028 모두에 대해 항균활성을 보였으며 특히 2,000g/ml 농도에서는 Escherichia coli ATCC 25922 및 Staphylococcus aureus KFCC 11764을 제외하고는 거의 생육하지 못하였다. 각 분획물(n-hexane, ethylether, ethylacetate 및 water)들간의 항균활성은 Clostridium perfringens ATCC 3627을 제외하고는 유의적인 차이가 없었다. 가자의 ethylacetate 분획은 Sephadex G-200 column chromatography에 의한 30개 분획 중 12에서 21번까지의 분획에서 강한 항균활성을 나타내었으며 silica gel column chromatography에 의한 40개 분획 중에서는 22에서 34까지의 분획에서 항균활성을 보였다.

• 한국식품저장유통학회지
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• 제10권2호
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• pp.224-229
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• 2003

양파 근권미생물은 양파 뿌리를 균원시료로 하여 약 250여종의 근권미생물을 순수 분리하였고 이들 중에서 길항미생물은 무름병균인 Erwinia carotovora subsp. carotovora와 시들음병균인 Fuarium oxysporium에 각각 서로 대치 배양하여 두 병원균 모두에 가장 강한 길항 효과를 나타내는 YJ-4 균주를 최종 선발하였다. 선발균주 YJ-4는 Bergey's mannual of systematic bacteriology 방법에 따라 조사하여 Bacillus 속으로 판정하였고, 세포벽 지방산을 분석하여 동정하는 Sherlock system에 의해 Bacillus ehimensis와 0.778의 유의성을 확인하였으며, 165 rDNA의 부분 염기서열(609bp)로 Bacillus ehimensis와 98.36%의 높은 유사도를 보여 길항균 YJ-4는 Bacillus ehimensis로 동정하였다. B. ehimensis YJ-4로 명명한길항균은 세균인 무름병균 (Erwinia carotovora subsp. carotovora)과 세균썩음병균 (Pseudomonas sp.)에도 길항력을 나타내었고, 진균인 잘록병균 (Rhizoctonia solani), 잎마름병균 (Stemphylium botryosum), 검은무의병균 (Alternaria porri), 검은점잎마름병균 (Septoria sp.), 잿빛곰팡이병균 (Botrytis cinerea), 흑색썩음균핵병균 (Sclerotium cepivotum), 시들음병균 (Fusarium oxysporium), 푸른곰팡이병균 (Penicillium sp.)등에도 길항 효과를 나타내었다. 특히 시들음병균인 F. oxysporium에 생육억제환의 길이가 24.8mm로 가장 높은 길항력을 나타내었다.