• Title/Summary/Keyword: Microbial inhibition

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Studies on the Antineoplastic Components of Korean Basidiomycetes (한국산(韓國産) 담자균류(擔子菌類) 항암(抗癌) 성분(成分)에 관한 연구(硏究))

  • Kim, Byong-Kak;Chung, Hee-Soo;Chung, Kyung-Soo;Yang, Moon-Sik
    • The Korean Journal of Mycology
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    • v.8 no.2
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    • pp.107-113
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    • 1980
  • To investigate antitumor components of Korean higher fungi, the carpophores of Ganoderma lucidum (Fr.)Karst. were collected at Gal-mae-ri in Gyeong-gi Province and extracted with 0.1N sodium hydroxide solution. The extract was purified by dialyzing through Visking tube and a dark brownish power was obtained. The antitumor activity of the fraction was tested against sarcoma 180 implanted in mice. The tumor inhibition ratio of the fraction against the tumor was 87.6% in doses of 50 mg/kg/day for the period of ten days. The tumor in five of 15 mice was completely regressed. The antitumor fraction was chemically analyzed and found to be a complex of polysaccharide and protein, from which four monosaccharides and eighteen amino acids were identified.

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Effects of Chemical Compounds on Vase Life and Microbial Growth of Cut Calla Flowers

  • Lee, Seon-Ha;Kim, Jung-Ho
    • Plant Resources
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    • v.3 no.1
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    • pp.59-65
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    • 2000
  • The opening process of cut calla flower was faster at 30 t than at lower temperatures as it could be expected from its tropical origin. Gibberellin enhanced the flower opening, however, it also speeded up senescent. Silver thiosulfate was effective in prolonging the vase life of the cut calla flower. Silver thiosulfate reduced ethylene generation by the flower and inhibited microbial growth in the flower stalk. Reduction in ethylene generation and inhibition of microbial growth is thought to be responsible for the extension of the vase life of cut calla flowers by silver thiosulfate.

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Studies on Antimicrobial of Impatiens balsamina extract (I) -Sereening of Antimicrobial on extract solvent- (봉선화 추출물의 항균성에 관한 연구(I) -추출용매에 따른 항균성 검색-)

  • 정진순;최석철
    • Proceedings of the Korean Fiber Society Conference
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    • 1996.10a
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    • pp.500-506
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    • 1996
  • To study antimicrobial activities of Impatiens balsamina, its leaf and stem was extracted by methanol and water. The extracts were tested their microbial inhibition activities against several microorganisms, staphylococcus aureus KCTC 1928, Escherichia coli KCTC 1116, Klebsiella pneumoniae KCTC 2690, Trichophyton mentagrophytes KCTC 6316. The methanol extract and water extract of the leaf and stem didn't show the inhibition effect on E. coli but showed the inhibition effect against the ohter 3 species of the microorganisms tested. The extract of leaf showed higher inhibition than the extract of stem. And the methanol extract showed higher inhibition than the water extract.

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Antimicrobial Activities Against Oral Microbes and Growth-inhibitory Effect on Oral Tumor Cell by Extract of Paeonia lactiflora (작약 추출물의 구강병원균에 대한 항균성 및 구강암 세포 증식 억제효과)

  • Park, Hyun-Suk;Min, Kyung-Jin;Cha, Chun-Geun;Song, Jin-Wook;Son, Jin-Chang
    • Journal of Environmental Health Sciences
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    • v.33 no.1 s.94
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    • pp.21-29
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    • 2007
  • Paeonia lactiflora was stepwise extracted with hexane, chloroform, ethyl acetate, butanol and water. Anti-microbial activity of each extract was investigated. Methanol extract of P. lactiflora revealed anti-microbial activity against S. mutans, C. albicans, and S. aureus. Also, hexane fraction revealed anti-bacterial activity against S. mutans and ethyl acetate fraction acted as potent anti-microbial agent on C. albicans and S. aureus. The relative growth ratio(RGR) of hexane fraction of P. lactiflora against S. mutans were determined as 77.8% in concentration of 0.125 mg/ml, 98.46% in 0.25 mg/ml and 100% in 0.5 mg/ml. The ethyl acetate fraction of P. lactiflora revealed RGR against C. albicans as 52.5% in concentration of 0.125 mg/ml, 60.83% in 0.25 mg/ml and 78.33% in 0.5 mg/ml. It indicate that increasing concentration increase RGR. The measured minimal inhibitory concentration(MIC) of hexane fraction on S. mutans KCTC 5316 strain was 0.5 mg/ml and MIC of ethyl acetate fraction on C. albicans KCTC 7270 was 2.0 mg/ml. The experiment of inhibition to growth of KB roll(oral squamous cell carcinoma) result 61.9% in butanol, 76.7% in hexane extract of P. lactiflora. The hexane extract exhibit potent inhibition effect to the growth of KB cell. These results suggest that the hexane extract of Paeonia lactiflora has antimicrobial activity against S. mutans and has preventive effect to dental caries in addition to potent inhibition to KB cell growth.

Effect of Ethanol Extract of Herbal Medicine on Crop Growth Inhibitor (한약재 주정 추출물이 종자발아와 유묘생장에 미치는 영향)

  • Kim, Jin-Hyo;Kim, Jun-Young;Ryu, Sung-Ji;Choi, Geun-Hyoung;Kim, Won-Il;Kim, Se-Ri;Park, Byung-Jun;Cho, Nam-Jun
    • Korean Journal of Environmental Agriculture
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    • v.33 no.3
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    • pp.194-197
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    • 2014
  • BACKGROUND: Herbal extracts have been screened for their inhibitory effect of seed germination and root development on weeds, but there is a scarcity of reports for crop growth regulation. The objective of this research was to develop a growth inhibitor on Brassica campestris, and its effective extraction method from herbal medicine extract. METHODS AND RESULTS: Eighty four herbal medicine extracts were tested for their plant growth inhibition activity on B. campestris. The alcohol extracts of Artemisia annua, Cinnamomum cassia, and Mentha arvensis inhibited over 30% of germination and the extract of A. annua, and C. cassia inhibited over 70% of radicle growth at 0.1 % w/w treatment. The partially purified extracts of A. annua, and C. cassia with dichloromethane and hexane showed stronger radicle growth inhibition than the crude extracts on B. campestris. The diethyl ether extract of A. annua showed a similar 50% radicle growth inhibition ($RI_{50}$ = 45 mg/L) to its partially purified extract with dichloromethane or hexane, but the diethyl ether extract of C. cassia showed a worse $RI_{50}$ than the purified extract. CONCLUSION: The alcohol extracts of A. annua, and C. cassia showed potent radicle growth inhibition properties on B. campestris. Diethyl ether proved to be a good solvent for simple extraction from A. annua.

Degradation of BTX by Aerobic Microbial Consortium (호기성 미생물 컨소시엄에 의한 BTX의 분해)

  • 문종혜;김종우;박진수;오광중;김동욱
    • KSBB Journal
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    • v.16 no.1
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    • pp.61-65
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    • 2001
  • In this study, a BTX degrading microbial consortium was obtained from the activated sludges of a BTX releasing sewage water and city sewage water treatment plant. The MY microbial consortium was developed for benzene and toluene degradation, whereas the MA microbial consortium was developed for xylene isomers. The major microorganism of the MA consortium was identified as Rhodococcus ruber DSM 43338T, whereas that of the MY consortium was Rhodococcus sp. In terms of the degradation of a single component, the removal rate of benzene was fastest and decreased in order; toluene, o-xylene, p-xylene and m-xylene. For degradation of mixed BTX, most BTX were degraded within 108 hours and the degradation rate showed either stimulatory or inhibitory effects depending on the composition. MA and MY microbial consortium obtained in this study may be used effectively to remove BTX biologically.

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Effect of Increasing Amounts of Ammonium Nitrogen Induced by Consecutive Mixture of Poultry Manure and Cattle Slurry on the Microbial Community during Thermophilic Anaerobic Digestion

  • Alsouleman, Khulud
    • Journal of Microbiology and Biotechnology
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    • v.29 no.12
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    • pp.1993-2005
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    • 2019
  • Thermophilic anaerobic digestion (TAD) is characterized by higher biogas production rates as a result of assumedly faster microbial metabolic conversion rates compared to mesophilic AD. It was hypothesized that the thermophilic microbiome with its lower diversity than the mesophilic one is more susceptible to disturbances introduced by alterations in the operating factors, as an example, the supply of nitrogen-rich feedstock such as poultry manure (PM). Laboratory scaled TAD experiments using cattle slurry and increasing amounts of PM were carried out to investigate the (in-) stability of the process performance caused by the accumulation of ammonium and ammonia with special emphasis on the microbial community structure and its dynamic variation. The results revealed that the moderate PM addition, i.e., 25% (vol/vol based on volatile substances) PM, resulted in a reorganization of the microbial community structure which was still working sufficiently. With 50% PM application, the microbial community was further stepwise re-organized and was able to compensate for the high cytotoxic ammonia contents only for a short time resulting in consequent process disturbance and final process failure. This study demonstrated the ability of the acclimated thermophilic microbial community to tolerate a certain amount of nitrogen-rich substrate.

Physical and Chemical Composition, Anti-Microbial Activity and Cytotoxicity of Kiwifruit Skin (식품표시 관련 교육경험에 따른 중학생들의 식품표시에 대한 인식과 활용실태)

  • Heo, Buk-Gu;Park, Yong-Seo;Im, Myung-Hee;Oh, Kyung-Taek;Cho, Ja-Yong
    • The Korean Journal of Community Living Science
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    • v.20 no.1
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    • pp.61-69
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    • 2009
  • This study was conducted to examine the chemical composition of kiwifruit skin, and to est its anti-microbial activities and cytotoxicities, thus, exploring ways for the economic utilization of kiwifruit skin. Four varieties of kiwifruit were examined: Daeheung, Bidan, Haegeum No.1 and Hayward. Vitamin C content in the fruit skins of Bidan, Daeheung, Haegeum No.1 and Hayward were 72.44, 67.22, 62.51 and 61.44mg/100g, respectively. Total amino acids content in the fruit skins of Bidan, Haegeum No.1, Hayward and Daeheung ere 808.31, 706.02, 629.07 and 464.83mg/100g dry weight, respectively. K and Ca content ere $17.20-45.70{\mu}g/mL$ and $4.58-10.15{\mu}g/mL$. While, other inorganic matter contents were below $4.89{\mu}g/mL$. Anti-microbial activity of kiwifruit skin extracts, in terms of the diameter of inhibition zone when tested against five gram positive and three gram negative microbial trains (even in the concentration of 2,000mg/L), was less than 14.1mm. The hyperplasia inhibition of lung cancer cells by methanol extracts from Bidan and Haegeum No.1 using concentrations of 800mg/L were 27.7% and 14.5%, however, those from Daeheung and Hayward were below 3% Consequently, it will be useful to know that kiwifruit skin can be added to processed goods which demand for higher concentrations of vitamin C, amino acids, K and Ca.

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Studies on the Antitumor Components of Korean Basidiomycetes(II) -Antitumor Components of Schizophyllum commune and Auricularia auricula-judae- (한국산(韓國産) 담자균류(澹子菌類)의 항암성분(抗癌咸分)에 관한 연구(硏究)( II ) -치마버섯과 목이버섯의 항암성분(抗癌成分)-)

  • Lee, Song-Ae;Chung, Kyeong-Soo;Shim, Mi-Ja;Choi, Eung-Chil;Kim, Byong- Kak
    • The Korean Journal of Mycology
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    • v.9 no.1
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    • pp.25-29
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    • 1981
  • To investigate antitumor components of Korean higher fungi, the carpophores of Schizophyllum commune and Auricularia auricula-judae collected in Kyeong Buk Province were extracted with hot water or 0.1N-NaOH solution. The concentrated extracts were precipitated by addition of ethanol, and the precipitates were purified by dialyzing through visking tube and polysaccharide fractions were obtained. They were found to show antitumor activity against sarcoma 180 implanted in mice. Especially, the inhibition ratio of the extract of Auricularia adicula-judae was 90.8% in the doses of 100mg/kg/day for the period of ten days. The tumor in five of the eight mice was completely regressed. The components of these aqueous extracts were found to be polysaccharide and protein. The hydrolysis of the respective polysaccharide yielded four monosaccharides. After hydrolysis of the protein fraction, 15 amino acids were identified in the respective fraction of S. commune and A. auricula-judae.

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Conformation of Group "a" Epitope in Hepatitis B Surface Antigen

  • Chun, Mun-Ho;Park, Won-Bong;Bok, Jin-Woo;Kim, Ha-Won;Choi, Eung-Chil;Kim, Byong-Kak
    • Archives of Pharmacal Research
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    • v.15 no.4
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    • pp.347-355
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    • 1992
  • To elucidate structure of group "a" epitope, mouse antibodies that express idiotype monoclonal antibody and anti-idiotype monoclonal antibody against the group specific "a" determinant were purified by hydroxyapatite column. To obtain hepatitis B surface antigens (HBsAg). HBsAg positive blood was sequencially purified by ammonium sulfate precipitation, hydroxyapatite, sepharose 4B column chromatography and ultracentrifugation. The major protein (p25) and glycoprotein (gp30) of HBsAg were isolated by concanavalin-A-sepharose 4B. The ability of p25-gp30 among the HBsAg to inhibit the idiotype-anti-idiotype reaction was dependent on conformation, since reduced and alkylated p25-gp30 virtualy lost their inhibitory capacity when compared to native HBsAg. The data suggest that hepatitis B antigen is a conformational antigen critically dependent upon the disulfide bonds of p25-gp30.

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