• 제목/요약/키워드: JAR cell

검색결과 113건 처리시간 0.024초

Phenol 분해균주의 분리 및 페놀함유 폐수의 생물학적 처리 (Isolation of a Phenol-degrading Bacterial Strain and Biological Treatment of Wastewater Containing Phenols)

  • 이현돈;이명은;김형갑;서현효
    • 생명과학회지
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    • 제23권10호
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    • pp.1273-1279
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    • 2013
  • 방향족화합물들로 오염되어있는 토양 및 산업폐수를 포함한 각종 시료로부터 phenol에 분해활성이 높은 56균주를 순수분리 하였으며, 이들 분리 균주 중 균체생육과 phenol 분해활성이 가장 높은 균주인 GN13을 선별하였다. 분리균주 GN13은 형태학적, 생리학적 및 생화학적 특성을 조사한 결과 Neisseria 속 세균과 유사한 것으로 판명되어 최종적으로 Neisseria sp. GN13으로 명명하였다. 분리균주 Neisseria sp. GN13의 균체생육 및 phenol 분해를 위한 최적온도와 최적 pH는 각각 $32^{\circ}C$와 7.0였다. 유일 탄소원으로 phenol 1,000 mg/l를 포함하여 최적화된 배지를 사용한 jar-fermentor 배지에서 배양 30시간에 균체생육이 최대에 이르렀으며 배양 27시간째 거의 모든 phenol이 분해되었으며, catechol deoxygenase 활성측정에 의하여 Neisseria sp. GN13은 meta-와 ortho-pathway를 통하여 catechol 분해가 일어났다. Neisseria sp. GN13은 phenol 함유 인공폐수에서의 phenol 분해율은 배양 30시간 만에 97%의 phenol이 분해되는 것으로 나타났으며, 인공폐수에 대한 Neisseria sp. GN13과 활성슬러지 처리구에서의 TOC 제거효율은 각각 83%와 78%였다. 석유화학폐수에 대한 Neisseria sp. GN13의 COD 제거율은 활성슬러지만을 포함한 대조구보다 약 1.3배 높은 효율을 나타내었다. 이러한 결과로 미루어 분리균주 Neisseria sp. GN13은 phenol을 함유하고 있는 여러 폐수에 효과적으로 적용될 수 있을 것으로 생각된다.

Biocatalytic Production of Aldehyde by a Methanol Utilizing Yeast, Hansenula nonfermentans KYP-l Grown in Methanol-limited Continuous Culture

  • Yoon, Byung-Dae;Kim, Hee-Sik;Kwon, Tae-Jong;Yang, Ji-Won;Kwon, Gi-Seok;Lee, Hyun-Sun;Ahn, Jong-Seog;Mheen, Tae-Ick
    • Journal of Microbiology and Biotechnology
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    • 제2권4호
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    • pp.278-283
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    • 1992
  • Aldehyde production by cells of a methanol utilizing yeast, Hansenula nonfermentans KYP-1 was improved when they were grown in a methanol-limited continuous culture, in comparison with cells grown in a batch culture. A higher cell yield was also obtained in continuous culture than in batch culture. This could be due to the fact that a lower methanol concentration was maintained in the jar fermentor to minimize growth inhibition by methanol. A maximum cell productivity of 0.219 g.$liter^{-1}.hr^{-l}$ and a cell yield of 47% were obtained at dilution rates of 0.1 $hr{-1}$ and 0.06 hr{-1}, respectively. The greatest amount of aldehyde was measured at a dilution rate of 0.08 $hr{-1}$. Under optimum reaction conditions, 915.7 mM of acetaldehyde was produced from 1.5 M ethanol after 21 hours reaction, with a conversion rate of 61%. Propionaldehyde and acrolein were produced with conversion rates of 32.7% and 44%, respectively.

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Anti-inflammatory Effects of Complex Extract including Eucommia ulmoides in LPS-induced RAW 264.7 Cells

  • Ryu, Hwa Yeon;Lee, Hyun;Kong, Hae Jin;Kang, Jae Hui
    • Journal of Acupuncture Research
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    • 제36권4호
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    • pp.256-263
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    • 2019
  • Background: The purpose of this study was to investigate the anti-inflammatory response of lipopolysaccharide (LPS) activated macrophages (RAW 264.7 murine cell line) to JCE003 which is an extract including Eucommia ulmoides, Juglans regia, Eleutherococcus senticosus, and Zingiber officinale. Methods: An MTT [3-(4,5-dimethylthiazole-2-yl)-2,5-diphenyltetrazolium bromide] assay was performed to analyze the survival rate of RAW 264.7 cells. The production of nitric oxide and pro-inflammatory cytokines (IFN-${\gamma}$, TNF-${\alpha}$, IL-$1{\beta}$, IL-6) in LPS-induced RAW 264.7 cells was measured by enzyme-linked immunosorbent assay. mRNA expression levels of pro-inflammatory cytokines (IFN-${\gamma}$, TNF-${\alpha}$, IL-$1{\beta}$, and IL-6) were analyzed by quantitative polymerase chain reaction analysis. Results: Exposure of LPS-activated RAW 264.7 cells to JCE003 was not cytotoxic up to $400{\mu}g/mL$, but cell survival was statistically significantly decreased at $800{\mu}g/mL$ (p < 0.001). Nitric oxide production was not markedly lowered in LPS-activated RAW 264.7 cells by exposure to JCE003 (10, 50, 100, 200, 400, $800{\mu}l/mL$) compared with the Control group. In addition, JCE003 reduced the production of TNF-${\alpha}$ in LPS-induced RAW 264.7 cells at $400{\mu}g/mL$ (p < 0.05), but IFN-${\gamma}$ and TNF-${\alpha}$ mRNA expression in LPS-induced RAW 264.7 cells was decreased at 100, 200, and $400{\mu}g/mL$ JCE003 (p < 0.01). Conclusion: These results suggest that JCE003 inhibited the expression and production of pro-inflammatory cytokines in LPS-activated RAW 264.7 cells. The findings of this study provide basic data for the development of new Korean medicine anti-inflammatory drugs.

Effects of Snake Venom Pharmacopuncture on a Mouse model of Cerebral Infarction

  • Choi, Chul-Hoon;Song, Ho-Sueb
    • Journal of Acupuncture Research
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    • 제36권3호
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    • pp.140-146
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    • 2019
  • Background: This study investigated the effects of Vipera lebetina turanica snake venom (SV) on cerebral infarction induced by middle cerebral artery occlusion in mice. Methods: Following cerebral infarction, SV was injected intravenously or added to BV2 cell culture. Tissue injury was detected using triphenyltetrazolium chloride (TTC) staining, neurological deficit score, NO, ROS, and GSH/GSSG assays, qPCR, Western blot, and cell viability. Results: Cerebral infarction caused by middle cerebral artery occlusion as observed by TTC staining, showed SV inhibited cell death, reducing the number of brain cells injured due to infarction. SV treatment for cerebral infarction showed a significant decrease in abnormal behavior, as determined by the neurological deficit score. The oxidation and inflammation of the cells that had cerebral infarction caused by middle cerebral artery occlusion (NO assay, ROS, GSH/GSSG assay, and qPCR), showed significant protection by SV. Western blot of brain infarction cells showed the expression of iNOS, COX-2, p-IkB-${\alpha}$, P38, p-JNK, p-ERK to be lower in the SV group. In addition, the expression of IkB increased. BV2 cells were viable when treated with SV at $20{\mu}g/mL$ or less. Western blot of BV2 cells, treated with 0.625, 1.5, $2.5{\mu}g/mL$ of SV, showed a significant decrease in the expression of p-IkB-${\alpha}$, p-JNK, iNOS, and COX-2 on BV2 cells induced by LPS. Conclusion: SV showed anti-inflammatory and anti-oxidant effects against cerebral infarction and inflammation.

Sporobolomyces holsaticus의 배양중 전분자화 특성조사 (Study on the Pattern of Starch Assimilation by Sporobolomyces holsaticus)

  • 박완수;구영조;신동화;민병용
    • 한국식품과학회지
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    • 제15권2호
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    • pp.177-182
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    • 1983
  • 전분으로부터 효모균체를 직접 생산하기 위하여 분리, 동정된 전분이용성 효모, Sporobolomyces holsaticus FRI Y-5의 배양중 전분자화특성에 대하여 검토하였다. 유기영양원인 yeast extract 첨가실험에서 균체량이 최고에 이르며 전분이용율도 높은 최적첨가량은 2.5g/l였다. 발효조배양실험에서 Sp. holsaticus의 비성장 속도는 $0.14\;hr^{-1}$였으며 최대균체량은 13.4g/l였다. 배양 80시간후 relative blue value는 45.1%가 감소되었고 전분은 45.96%가 소모되었으며 이때 균체수율은 0.425였다. 환원당은 전체적으로 증가하다 감소하는 경향을 보였으며 배양중 pH는 pH7.0을 중심으로 거의 변화가 없었다. Sp. holsaticus amylase의 최적온도 및 작용 pH는 각각 $40^{\circ}C$, pH7.5였다. Tapioca 전분농도별 배양실험에서 Tapioca전분의 초기농도가 41.46g/l일 때 균체량이 18.17g/l로 최대였으며 이때 소모된 Tapioca전분량도 25.53g/l로 최대였다. 그러나 균체수율은 Tapioca농도가 증가함에 따라 증가하였다. 이때 Tapioca전분의 최적초기농도는 가용성전분에 비하여 낮았다. Sp. holsaticus FRI Y-5의 침강속도는 IFO 1032 균주에 비하여 매우 느렸으며 균체점도는 높은 편이었다.

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가축용 생균제 Lactobacillus plantarum을 이용한 양파즙 발효의 균체성장과 항산화 활성 (Cell Growth and Antioxidant Activity on Onion Juice Fermentation by Using Lactobacillus plantarum as Animal Probiotics)

  • 장우경;조상범;김동운;이상석;김수기
    • 생명과학회지
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    • 제20권11호
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    • pp.1729-1737
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    • 2010
  • 본 연구는 양파즙을 이용하여 가축 사료첨가제용 Lactobacillus plantarum의 배양 최적화를 위하여 수행되었다. 양파즙의 첨가수준이 균체성장과 항산화 활성에 미치는 영향을 평가하였을 때, 그 첨가수준이 증가할수록 모두 높아졌다. 양파즙, 설탕 그리고 yeast extract를 배지성분요인으로 선택하였고, 배지 내 성분요인들의 혼합비율에 의한 효과를 평가하였다. 24 개의 실험들로 구성된 완전 요인 배치법을 이용하여 요인들의 주효과와 상호작용을 조사하였다. 균체성장과 항산화 활성에 대한 유의성 있는 긍정적 주효과는 각각 yeast extract와 양파즙에서 나타났다. 유의적인 상호작용으로는 항산화 활성에 대하여 설탕와 yeast extract 사이에서 나타났다. 최종적으로 양파 600 g/l, 설탕 15 g/l 및 효모추출물 5 g/l의 최적 배지조성을 선발하였다. 얻어진 최적배지의 효율을 분석하기 위하여 5 l 발효기를 이용하여 평가한 결과 최대 균체 성장량은 배양 12시간째에 $9.7\;{\log}_{10}$ (CFU/ml)로 나타났다. 배양 마지막인 20시간 때에는 $8.9\;{\log}_{10}$ (CFU/ml)의 균체 성장량을 보였으며 이는 예측된 $9.01\;{\log}_{10}$ (CFU/ml)과 매우 유사한 결과였다. 배양액의 항산화 활성은 모든 배양 시간대에서 약 60~65%로 유지되었으며, 이것은 예측된 값(47.1%)보다 훨씬 우수하였다.

Effects of Culture Conditions on Mycelial Growth and Polysaccharide Production of Tricholoma matsutake in Bioreactor

  • 최민구;김성수;홍억기
    • 한국생물공학회:학술대회논문집
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    • 한국생물공학회 2003년도 생물공학의 동향(XII)
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    • pp.149-152
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    • 2003
  • 본 연구에서는 담자균류의 일종인 Tricholoma matsutake의 균사체 생육과 polysaccharide 생산을 최적화하기 위하여 5L jar fermentor에서 교반속도와 통기량의 영향을 검토하였다. 교반속도는 150 rpm에서 가장 좋은 결과를 보였으며, 균체량은 배양 10일째 21.87 g/L, polysaccharide는 교반속도는 300 rpm에서 배양 8일째 8.86 g/L 로 가장 높은 값을 나타내다. 통기량은 11일째 0.5 vvm에서 가장 좋은 균체량 20.85 g/L, polysaccharide는 1.5vvm에서 배양 11일째 8.83 g/L로 가장 높은 값을 나타내었다.

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Mucor sp. KCTC 8405P에 의한 ${\gamma}-Linolenic$ Acid 함유 곰팡이 유지의 생산 (Production of the Fungal Lipid Containing ${\gamma}-Linolenic$ Acid from Mucor sp. KCTC 8405P)

  • 박종현;신현경
    • 한국식품과학회지
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    • 제24권4호
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    • pp.326-329
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    • 1992
  • ${\gamma}-linolenic$ acid를 함유한 유지를 생산하기 위해 포도당을 주기적으로 첨가하면서 Mucor sp. KCTC 8405P를 유가배양하였다. 배양 시작 후 2일까지 효모 모양으로 배양한 후 배지의 pH를 높여 균사체 모양으로 유도하여 배양하면, 지방질은 포도당이 고갈되는 배양 7일째까지 축적되었다. 본 배양조건에 의하여 건조 균체량 99.3 g/l, 총지방질 38.0 g/l와 3.5 g/l의 ${\gamma}-linolenic$ acid를 얻을 수가 있었다.

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오이조직 배양세포에 의한 Ascorbate Oxidase 생성 및 생산 (Formation and Production of Ascorbate Oxidase by Cucumber Tissue Cultured Cells)

  • 이종화;정호권;;임번삼
    • 한국미생물·생명공학회지
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    • 제21권4호
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    • pp.329-335
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    • 1993
  • Ascorbate oxidase activity in various cucumber tissue extracts was highest in young fruit peeling. Cucumber callus was induced from young fruit peeling and callus cell lines were selected for more than 7 months, which porduced high levels of ascorbate oxidase and had a high growth rate. Induction of callus was optimized with Linsmaier-Skoog(LS) medium at 25$^{\circ}C$ in dark phase. Ascorbate oxidase activity reached a maximum at 5 days after transfer to LS basal liquid-medium ant then declined. The enzyme activity in callus cells was stimulated by addition of 10${\mu}$M $CuSO_4$ in the early logarithmic phase of growth. And also, adding 10${\mu}$M $CuSO_4$ at 3rd day 7th day of culture period, ascorbate oxidase activity in callus cells was maintained to high level. Maximum yield of ascorbate oxidase was found at the 25th day by flask shaking culture, but three-fold of ascorbate oxidase activity was obtained at the 16th day by jar fermentation.

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개선된 제조기법에 의한 오징어젓갈 제조 (Manufacture of Squid-Jeotgal by the Improved Process)

  • 윤지혜;이원동;강지희;이지선;이명숙
    • 한국수산과학회지
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    • 제36권4호
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    • pp.333-339
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    • 2003
  • New manufacturing process was applied to manufacture the low salted Squid-Jeotgal to improve the quality variation salty taste and shelf-life. It's optimum salting and sugaring process was made by the addition of $17\%$ NaCl for 3 hr and $15\%$ corn syrup for 4 hr with 10 rpm agitation. Quality variations of Squid-Jeotgal produced by the improved and the conventional process were packed by jar, polyethylene lerephthalatefpolyethyleneilinear low density polyethylene (PET) and low density polyethylene (PE). And then quality variations of them were investigated at storage temperature of 10, 20, and $30^{\circ}C.$ Decreasing rate of pH, increasing rates of VBN and viable cell counts of Squid-Jeotgal produced by the improved process were slower than those of the conventional process at all storage temperature. Sensory evaluation indicated that the production of Squid-Jeotgal by the improved process extended the shelf-life about 10-20 days.