• 제목/요약/키워드: Growth Inhibition

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Alteromonas sp. SR-14가 생산하는 조류증식 저해 물질의 특성 (Characteristics of the Algal Growth inhibition Substances Produced by Alteromonas sp. SR-14)

  • 김지회;이희정;이태식;김형락;이명숙;장독석
    • 한국식품위생안전성학회지
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    • 제14권3호
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    • pp.270-276
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    • 1999
  • Alteromonas sp. SR-14의 배양여액을 사용하여 C. calcitrans의 증식에 미치는 영향과 조류 증식저해 물질의 특성을 살펴보았다. Alteromonas sp. SR-14의 peptone broth 배양여액은 C. calcitrans에 대하여 증식 저해 활성을 나타내었으며, 이 균에 의한 조류 증식 저해 물질은 온도 $15~20^{\circ}C$, pH 7.0~9.0, 염분 농도 $23~30{\textperthousand}$의배양 조건에서 강한 활성으로 생성되었으며, 이러한 조건(온도 $20^{\circ}C$, pH 8.0, 염분 농도 $30\textperthousand$)에서는 정지기부터 활성이 증가하였다. Alteromonas sp. SR-14가 peptone broth에서 생산하는 조류 증식 저해 물질의 분자량은 약 3KDa~12KDa의 복합 물질이었는데, $100^{\circ}C$에서 10분간 열처리하였을 때 3~10KDa 이하의 물질은 내열성이 있었으나 10KDa 이상의 물질은 불활성 되었다.

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에탄올 생산 균주 Saccharomyces cerevisiae ATCC 248858의 비성장속도에 관한 수학적 모형연구 (Investigated of Mathematical Model for the Specific Growth Rate of Ethanol Producing Microorganism, Saccharomyces cerevisiae ATCC 24858)

  • 김휘동;허병기
    • KSBB Journal
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    • 제13권6호
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    • pp.730-734
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    • 1998
  • An이ew식과 Aiba삭을 조합하여 에탄올 생산단주인 Saccharomyces cerevisiae ATCC 24858의 비성장속도를 당농도와 에탄올 농도의 함수로 표현하였다. 기침의 저해영향을 받지 않는 최대 당농도 $S_m$은 150 g/L이며 기질의 저해영향은 기질농도 S와 $S-S_{max}$항의 함수로 표현되었다. 최대 비성장 속도 ${\mu}max 는 0.49 hr^{-1}, Monod상수 K_s$는 19 g/L, Andrew식의 기질저해상수 $K_1$는 139 g/L이였다. 또한 비성장속도에 영향을 마치지 앓는 최대알콜농도 Pm이 존재하였으며 그 값은 2 g/L 이였다. 따라서 Aiba식에서 비성장속도에 영향을 미치는 에탄올 농도항은 P-Pm으보 표현되었다. 본 연구의 알코올생산균주에 대한 비성장속도의 완성된 수식은 디음과 같으며 이 수식에 위한 계산값은 평균오차 6% 내외의 범위에서 실험값과 일치하였다.

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토복령알코홀추출물의 항진균작용 (Effects of Chinae Rhizoma Extracts on the Growth of the Dermatophytes)

  • 이종화;송병숙;조선희;김정일
    • 대한약리학회지
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    • 제9권2호
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    • pp.39-45
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    • 1973
  • The majority of drugs used in the treatment of superficial fungal infections has limited values due to its low efficacy or development of resistance. For the purpose of searching efficacious agent on the superficial fungal infections induced by dermatophytes which is regarded as the most malicious one, authors examined whether Chinae Rhizoma Extracts have significant on it. Extracts from Smilax china Linne used for the study are water extract (CRWE), ethanol extract (CREE) and methanol extract (CRME). In in vitro studies, the spores of the dermatophytes were inoculated on Sabouraud's glucose agar media which contained three extracts of Chinae Rhizoma in each concentration of $500\;{\mu}g/ml$, $1,000\;{\mu}g/ml$ and $5,000\;{\mu}g/ml$ respectively, and also $1,000\;{\mu}g/ml$ of salicylic acid and undecylenic acid $1,000\;{\mu}g/ml$ as comparable drugs. The growth of the dermatophytes were observed for 3 weeks. The species of the dermatophytes used in this experiment were Epidermophyton floccosum, Microsporum canis, Microsporum cookei, Microsporum gypseum, Microsporum nanum, Trichophyton mentagrophytes, Trichophyton rubrum, Trichophyton tonsurans and Trichophyton verrucosum distributed from The Institute of Tropical Medicine in Belgium. The results of the studies were as follows: 1. The growth of M. canis, M. nanum, T. mentagrophytes, T. rubrum & T. tonsurans were slightly inhibited in CRWE $1,000\;{\mu}g/ml$ and CRWE $5,000\;{\mu}g/ml$, and only slight inhibition on the growth of E. floccosum, M. canis and M. gypseum were observed in CRWE $5,000\;{\mu}g/ml$. 2. Complete inhibition of T. rubrum, moderate inhibition of M. nanum & T. tonsurans, and slight inhibition of E. floccosunl, M. canis, M. cookei & T. mentagrophytes in growth were observed in concentration of CREE $500\;{\mu}g/ml$. The growth of M. gypseum was slightly inhibited, moderate inhibition on the growth of M. canis, M. cookei & T. mentagrophytes, and complete inhibition of E. floccosum, M. nanum, T. rubrum & T. tonsurans in growth were observeed by CREE $1,000\;{\mu}g/ml$. With $5,000\;{\mu}g/ml$ of CREE, the growth of E. floccosum, M. canis, M. cookei, M. gypseum, T. mentagrophytes, T. rubrum & T. tonsurans were completely inhibited except T. verrucosum being showed slight inhibition. 3. In CRME $500\;{\mu}g/ml$, slight inhibition of T. verrucosum, moderate inhibition of M. gypseum and complete inhibition of E. floccosum, M. canis, M. cookei, T. mentagrophytes, T. rubrum & T. tonsurans in growth were observed. The growth of E. floccosum, M. canis, M. cookei, M. gypseum, M. nanum, T. mentagrophytes, T. rubrum & T. tonsurans were completely inhibited except T. verrucosum being showed moderate inhibition in both CRME $1,000\;{\mu}g/ml$ and CRME $5,000\;{\mu}g/ml$. 4. In $1,000\;{\mu}g/ml$ of undecylenic acid, slight inhibition of T. verrucosum and complete inhibition of E, floccosum, M. canis, M. cookei, M. gypseum, M. nanum, T. mentagrophytes, T. rubrum & T. tonsurans in growth were observed. From the above results, it was found that Chinas Rhizoma Alcoholic Extracts(CREE & CRME) exerted significant antifungal activity, and their effects were probably derived from the pharmacological actions of triterpenoidal saponin and steroidal saponin.

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차조기 Perilla frutescens var. acuta.의 항균활성 (Growth inhibition of Perilla frutescens var. acuta extract)

  • 이은숙;서부일
    • 대한본초학회지
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    • 제20권2호
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    • pp.83-89
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    • 2005
  • Objectives : This study was performed to investigate the effects of Perilla frutescens var. acuta extracts on growth inhibition of Streptococcus pyogenes KCTC 3208. Methods : Measured growth inhibition of Streptococcus pyogenes KCTC 3208 by concentration of the Perilla frutescens var. acuta. extract and collection periods of the Perilla frutescens var. acuta. and picking region of the Perilla frutescens var. acuta. Results : The Perilla frutescens var. acuta. extract is effective on retarding growth of Streptococcus pyogenes KCTC 3208. At 3% the growth of Streptococcus pyogenes KCTC 3208 was suddenly retarded. The stem of Perilla frutescens var. acuta. extract in a sunny place on June is more effective then its leaf. Conclusions : These results suggest that Perilla frutescens var. acuta. extract is effective in growth inhibition of Streptococcus pyogenes KCTC 3208.

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백려노근경(白藜蘆根莖) 추출물(抽出物)의 항진균작용(抗眞菌作用) (Antifungal Activity of the Extracts from Veratrum album L. var. grandiflorum Max.)

  • 이종화;김원자;송병숙;조선희
    • 대한약리학회지
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    • 제9권2호
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    • pp.1-6
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    • 1973
  • Although numerous drugs are available for the treatment of superficial fungi infections of skin, the clinical effects of the majority of such drugs are not satisfactory. In the hope of searching the effective drugs for superficial fungi infections, authors studied whether Veratrum rhizoma extracts had any effect on fungi, with water extract (VRWE), ethanol extract (VREE) and methanol extract (VRME) from Veratrum album L. var. grandiflorum Max. In in vitro studies, the spores of fungi were inoculated on Sabouraud's glucose agar media which contained three extracts of Veratrun rhizoma in each concentration of $500\;{\mu}g/ml$, $1,000\;{\mu}g/ml$ and $5,000\;{\mu}g/ml$ respectively, and the growth of the fungi were observed for 3 weeks. The species of the fungi used in these experiments were Epidermophyton floccosum, Microsporum canis, Microsporum nanum, Microsporum gypseum, Microsporum cookei, Trichophyton rubrum, Trichophyton mentagrophytes, Trichophyton tonsurans and Trichophyton verrucosum. The results of the studies were as follows: 1. The growth of M. canis, M. nanum, T mentagrophytes and T. tonsurans were slightly inhibited by VRWE $1,000\;{\mu}g/ml$, and with VRWE $5,000\;{\mu}g/ml$, the growth of E. floccosum, M. gypseum and T. rubrum were slightly inhibited, moderate inhibition on the growth of M. canis, M. nanum, M. cookei, T. mentagrophytes and T. tonsurans were showed by VRWE $5,000\;{\mu}g/ml$. 2. With $500\;{\mu}g/ml$ of VREE, the inhibition on growth of E. floccosum, M. nanum and M. gypseum were slight, however significant inhibition on the growth of M. canis, M. cookei, T. mentagrophytes, T. rubrum and T. tonsurans were observed. The growth of M. nanum and M. gypseum were moderately inhibited, and significant inhibition on the growth of E. floccosum, M. canis, M. cookei, T. mentagrophytes, T. rubrum and T. tonsurans were observed by VREE $1,000\;{\mu}g/ml$. By VREE $5,000\;{\mu}g/ml$, the growth of all tested fungi were significantly inhibited except T. verrucosuia being showed slight inhibition. 3. Significant inhibition on the growth of M. canis, T, mentagrophytes, T. rubrum and T. tonsurans were noted, and moderate inhibition of M. nanum, slight inhibition of E. floccosum and M. gypseum in growth were observed by VRME $500\;{\mu}g/ml$. The growth of E. floccosum, M. canis, M. nanum, M. cookei, T. mentsgrophytes, T. rubrum and T. tonsurans were significantly inhibited by VRME $1,000\;{\mu}g/ml$, and that of M. gypseum was moderate. With $5,000\;{\mu}g/ml$ of VRME, significant inhibition on the growth of E. floccosum, M. canis, M. nanum, M. gypseum, M. cookei, T mentagrophytes, T. rubrum and T. tonsurans were observed, and T. verrucosum was showed only slight inhibition. From the above results, it was found that the extracts of organic solvents from Veratrum rhizoma (VREE & VRME) exerted significant antifungal activity, and their effects were probably derived from the pharmacological action of steroidal alkaloids.

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Clonogenic assay을 이용한 홍삼추출물의 인체종양세포에 대한 증식억제효과 (Growth Inhibition of Red Ginseng Extracts Against Human Tumor Cell Line by Clonogenic Assay)

  • 김창한;이경호;변은경
    • Journal of Ginseng Research
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    • 제22권3호
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    • pp.188-192
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    • 1998
  • We established the model of clonogenic assay with human tumor cell line such as Calu-3 (lung carcinoma), HEC- lB (endometrial adenocarcinoma) , HEp-2 (larnyx carcinoma), Hs-5787 (breast carcinoma), K-562 (chronic myelogenous leukemia), SF-188 (brain carcinoma), SNU-1 (stomach carcinoma) and WiDr (colon carcinoma) . We investigated growth inhibition of solvent (EtOH, MeOH) and water (100$^{\circ}C$, 121$^{\circ}C$) extracts from Korean red ginseng by clonogenic assay. The results of clonogenic assay showed that EtOH extract had growth inhibition against Calu-3, SF-188 and SNU-1, MeOH extract had growth inhibition against Calu-3, Hs-5787, K-562, and WiDr, but water extract at 100$^{\circ}C$ and water extract at 121$^{\circ}C$ had not growth inhibition against used cell lines.

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은 이온도입이 세균성장에 미치는 영향 (Inhibition of Bacterial Growth with Silver Wire Iontophoresis)

  • 이재형;김주영;제갈승주
    • The Journal of Korean Physical Therapy
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    • 제7권1호
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    • pp.61-67
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    • 1995
  • The silver cation has broad-spectrum antibiotic activity toward Gram-positive, Gram-negative, fungal. aerobic and anerobic micro-organisms. Silver has been used to care of infected wound. pyogenic arthritis, and chronic osteomyelitis. The purpose of this study was to determine whether pure silver wire iontophoresis using milliamperage direct current has an inhibitory effect on growth in vitro of 3 different species of bacteria-Staphylococcus aureus, Escherichia coli, and Pseudomonas aeruginosa. Using agarose based media, silver iontophoresis performed at 0, 1, 2, 4, 8 mA for 15 minutes. All experiments were performed in triplicate. Following iontophoresis, inhibition zone width of bacterial growth was measured with calliper. The inhibition of bacterial growth occured at the anodal silver electrode. Inhibition zone width of bacterial growth was significantly increased in all three bacterial species (p<0.05). Between bacterial species, inhibition zone width was not significantly different. Inhibition gone and amperage showed a highly significant positive linear relationship (p<0.001). The result of this study showed that pure silver wire iontophoresis with milliamperage direct current, as well as microamperage direct current, can inhibit bacterial growth in vivo.

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에리스리톨의 Streptococcus mutans에 대한 성장력과 산생성능의 억제효과 (The inhibitive effect of erythritol on growth and acidogenic ability of Streptococcus mutans)

  • 박영남
    • 디지털융복합연구
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    • 제11권12호
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    • pp.515-522
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    • 2013
  • 최근 대체 감미료로서 당알코올과 합성감미제에 관한 연구가 활발히 진행되고 있다. 에리스리톨은 포도당을 원료로 효모에 의해 생산되는 포도당 발효감미료로서 과실류, 버섯, 포도주, 청주, 간장등의 발효식품에 함유되어 있는 천연당질로 $C_4H_{10}O_4$의 분자구조를 가지는 4탄당의 당알코올이다. 구강내에서 산생성균인 Streptococcus mutans의 증식과 산생성, 치면세균막 형성 및 치아우식증 등은 여러 종류의 영양물질이 혼합되어 있는 구강내에서 일어나는 과정이므로 본 연구는 에리스리톨과 다른 감미제에서 S. mutans의 성장력과 산생성력을 분석하여 에리스리톨이 치아우식증의 예방에 관여하는 중요한 기전을 밝혀내어 치아우식예방을 위한 제품을 생산하거나 활용시 올바른 정보를 제공하고 개선방안을 마련하기 위한 기초자료를 제공하고자 시행하였다. 연구결과 에리스리톨은 우식활성균의 성장을 억제시키고 산생성능을 감소시켜 치아우식을 유발하지 않으며 우식예방효과가 있는 자당 대체 감미제로 우수한 것으로 확인이 되었다.

Inhibition of Hepatocellular Carcinoma Cell Growth by the Extract of Symphytum offcinale L. and the Possible Mechanisms for this Inhibition

  • Ham, Seung-Shi;Park, Kyong-Gun;Lee, Yong-Moon;Lee, Young-Ik;Yoon, Ji-Won;Kim, Seong-Jin;Lee, euk-Sik
    • Preventive Nutrition and Food Science
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    • 제2권3호
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    • pp.236-240
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    • 1997
  • A crude extract of Smphytum officinale L. (comfrey) was for its ability to inhibit he growth of hepatocellular carcinoma cells and expression of the insulin-like growth factor I (IGF-II) gene. The DNA synthesis of hepatocellular carcinoma cell lines, Hep G2, Hep 3B, and PLC/PRF/5 was inhibited by a crude extract of Smphytum officinale in both a time- and a dose-dependent manners. This plant extract also inhibited expression of the IGF-II gene. Since IGF-II exerts a mitogenic effect on Hep G2 cells, these results suggest that the growth inhibition by Symphytum officinale extract is, in part, mediated through the inhibition of IGF-II gene expression.

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환경독성 평가를 위한 좀개구리밥(Lemna gibba)의 성장저해시험법에 관한 연구 (Use of Duckweed (Lemna gibba) Growth-Inhibition Test to Evaluate the Toxicity of Chromate in Korea)

  • 김은주;이성규
    • Environmental Analysis Health and Toxicology
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    • 제16권4호
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    • pp.205-209
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    • 2001
  • Lemna gibba was newly cultured and provided for toxicity tests. In this study, the chromate toxicity tests for Lemna gibba were performed according to the OECD Lemna growth inhibition test guideline. The test species was Lemna gibba, and the tests were repeated 5 times. To evaluate the toxicity test results, the average specific growth rate, EC50, 95% confidential limit, and variances were calculated. The test performance was analyzed by the doubling time and test statistics. The average values of EC50 data determined by logistic and linear interpolation curves were 25.9 ppm and 35.4 ppm respectively (by chromate concentration). The doubling time of all controls were below 2.5 day, so all tests passed the criteria for the test performance. This study introduced a new test method, Lemna growth inhibition test, which is provided for the hazard assessment of aquatic environment.

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