• Title/Summary/Keyword: Sole

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Characterization of Biological Treatment by an Isolated Phenol-Degrading Bacterium (페놀분해세균의 분리 및 생물학적 처리 특성)

  • 송형의;김진욱
    • Journal of Environmental Health Sciences
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    • v.24 no.3
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    • pp.54-62
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    • 1998
  • 20 bacterial strains capable of growing on phenol minimal medium were isolated from soil and wastewater by the enrichment culture technique, and among them, one isolate which was the best in the cell growth was selected and identified as Bacillus sp. SH3 by its characteristics. Strain SH3 could grow with phenol as the sole carbon source up to 15 mM, but did not grow in minimal medium containing above 20 mM of phenol. The optimal conditions of temperature and initial pH for growth and phenol degradation were 30$^{\circ}$C and 7.5, respectively. This strain could grow on various aromatic compounds such as catechol, protocatechuic acid, gentisic acid, o-, m-, p-cresol, benzoic acid, p-hydroxybenzoic acid, anthranilic acid, phenyl acetate and pentachlorophenol, and the growth-limiting log P value of strain SH3 on organic solvents was 3.1. In batch culture, strain SH3 degraded 97% of 10 mM phenol in 48 hours. In continuous culture under the conditions of 20 mM of influent phenol concentration and 0.050 hr$^{-1}$ of dilution rate, the treatment rate of phenol was 94%.

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Biodegradation of BTEX (benzene, toluene, ethylbenzene, xylene isomers) from organic solvent tolerant bacterium, Pseudomonas savastanoi BCNU 106

  • Kim, Jong-Su;Park, Hyeong-Cheol;Jo, Su-Dong;Kim, Gi-Uk;Bae, Yun-Wi;Mun, Ja-Yeong;Jeong, Yeong-Gi;Ju, U-Hong
    • 한국생물공학회:학술대회논문집
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    • 2003.04a
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    • pp.386-389
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    • 2003
  • Organic solvent tolerance bacteria, Pseudomonas savastanoi BCNU 106 could utilize a high contentration of benzene, toluene, ethylbenzene, xylene isomers (BTEX) as a sole carbon source. It was founded that strain BCNU 106 transformed o-xylene to 2-methylbenzyl alcohol, 2-methylbenzoic acid through direct oxygenation of methyl residue on GC-MS analysis.

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A Content Analysis of Articles in Journal of the Korean Society of Costume: 1977~2001 (한국복식학회지 [복식]에 게재된 논문의 내용분석 -창간호(1977)부터 51권 8호(2001)까지-)

  • 이미숙
    • Journal of the Korean Society of Costume
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    • v.52 no.4
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    • pp.97-109
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    • 2002
  • The purpose of this study was to examine volumes 1 through 51-8 of the Journal of the Korean Society of Costume in relation to past trends In content area of research reported, authorship, and funding source. Six subject matter areas were indentified: history of costume, apparel design and aesthetics, fashion marketing, social psychological aspects of clothing, clothing construction, textile science and etc. Of the 892 articles studies, history of costume research represented 40.1%(358). Studies which focused on apparel design and aesthetics increased in number as the journal matured. 51.8%(462) were authored by a sole individual. 48.2%(430) were authored by above two persons. Funding sources were indentified in 15.7%(140) of the 892 articles. College and university grants 72.9%(102) were acknowledged most frequently as a funding source.

Monochlorination of Methane over Pt/NaY-zeolite Catalysts with High Platinum Dispersion (고분산도의 백금이 담지된 Pt/NaY 제올라이트 촉매상에서 메탄의 단일염소화 반응)

  • Lee, Dong-Keun
    • Applied Chemistry for Engineering
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    • v.2 no.3
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    • pp.238-245
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    • 1991
  • Chlorination of methane was carried out over the Pt/NaY zeolite catalysts having different dispersion and location. On the finely dispersed platinum particles inside the zeolite methylchloride was the sole product, while on the large platinum ones outside surface of the zeolite all four chloromethanes were produced. Besides the role of highly dispersed platinum particles, the confined volume of the supercages in the support seems to have played another role on the exclusive production of methylchloride by restricting the further chlorination.

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Age and Growth of the Marbled sole , pleuronectes yokohamae , in Approaches to Kyongyolbiyolto of the Yellow Sea , Korea (한국서해안 격열비열도 근해산 문치가자미의 연령과 성장)

  • 박종수
    • Journal of the Korean Society of Fisheries and Ocean Technology
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    • v.33 no.2
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    • pp.85-89
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    • 1997
  • 한국서해안 격열비열도 근해산 문치가자미의 연령과 성장을 조사하기 위하여 1992년 9월부터 1993년 8월까지 매월 정기채집한 256개체의 이석을 연령형질로서 사용하여 조사 분석한 결과를 보면, 이석의 투명대와 불투명대는 년 1회 형성되었으며 투명대 형성시기는 7월이고 불투명대 형성 시기는 2월에서 4월로 이는 산란종기(2월)와 일치함을 보였다. 연령별 체장 (LT)과 연령(t)을 von Bertalanffy 성장식에 적용하여 수컷은 Lt=313.7[1-exp{-0.4342(t+0.9017)}, 암컷은, Lt=458.1[1-exp{-0.2368(t+0.1934)}과 같은 관계식을 구하였다. 또한 암컷과 수컷의 성장속도는 2세까지는 별다른 차이를 보이지 않았으나, 3세어 이상에서는 암컷이 수컷보다 월등히 빠름을 나타내었다. 본 연구에서의 최고령어는 암수 각각 5세와 6세였다.

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Overview of Innate Immunity in Drosophila

  • Kim, Tae-Il;Kim, Young-Joon
    • BMB Reports
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    • v.38 no.2
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    • pp.121-127
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    • 2005
  • Drosophila protects itself from infection by microbial organisms by means of its pivotal defense, the so-called innate immunity system. This is its sole defense as it lacks an adaptive immunity system such as is found in mammals. The strong conservation of innate immunity systems in organisms from Drosophila to mammals, and the ease with which Drosophila can be manipulated genetically, makes this fly a good model system for investigating the mechanisms of virulence of a number of medically important pathogens. Potentially damaging endogenous and/or exogenous challenges sensed by specific receptors initiate signals via the Toll and/or Imd signaling pathways. These in turn activate the transcription factors Dorsal, Dorsal-related immune factor (Dif) and Relish, culminating in transcription of genes involved in the production of antimicrobial peptides, melanization, phagocytosis, and the cytoskeletal rearrangement required for appropriate responses. Clarifying the regulatory interactions between the various pathways involved is very important for understanding the specificity and termination mechanism of the immune response.

Isolation and Characterization of a Phenol-degrading Strain, Klebsiella pneumoniae (Phenol 분해균주 Klebsiella pneumoniae의 분리 및 특성)

  • 노종수;이헌모
    • Journal of environmental and Sanitary engineering
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    • v.15 no.1
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    • pp.34-38
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    • 2000
  • In the screening of phenol-degrading bacteria, a strain showing good growth in media containing phenol was isolated by using enrichment culture from various sample and identified as genus Klebsiella pneumoniae. The optimal temperature and pH for cell growth of Klebsiella pneumoniae was $35^{\circ}C$ and 8.0, respectively. When phenol was added to the minimal media as a sole source of carbon and energy, the concentration of maximum and optimum for cell growth was 1,200ppm and 1,000ppm, respectively. It was observed that Klebsiella pneumoniae was able to degrade 98% of phenol (1,000ppm) after 40hr in culture. The isolated could utilize various kinds of aromatic compounds and showed good growth in presence of phenol, m-cresol and 3-methyl catechol.

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New Combination of Pararrhynchium paradoxum koreanum (Hymenoptera: Vespidae: Eumeninae)

  • Kim, Jeong-Kyu
    • Animal Systematics, Evolution and Diversity
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    • v.36 no.1
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    • pp.81-84
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    • 2020
  • An eumenid subspecies Pararrhynchium paradoxum koreanum Giordani Soika, 1986 is newly combined to the genus Pseudepipona de Saussure, 1856. Although tegula of this subspecies is similar to one of Allodynerus, shape of scutellar crest and related structures in both sexes and peculiar shape of mandible in male are critically justifiable for the genus Pseudepipona. This form is a discrete species in the genus, thus named as Pseudepipona koreanum (Giordani Soika, 1986) n. comb. The original description of this species was based on the sole male specimen and hardly diagnostic, just providing coloration compared with the nominotypical subspecies of P. paradoxum. A redescription of males and description of the hitherto unknown female are provided.

Degradation of 2-Chlorophenol in the Aqueous Phase by a Photo-Fenton Process (광펜톤 반응에 의한 수중 2-클로로페놀 분해특성연구)

  • Kim, Il-Kyu
    • Journal of Korean Society of Water and Wastewater
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    • v.26 no.6
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    • pp.779-786
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    • 2012
  • The degradation of 2-chlorophenol(2-CP) by various AOPs(Advanced Oxidation Processes) including the photo-Fenton process has been examined. In sole $Fe^{2+}$, UV or $H_2O_2$ process without combination, low removal efficiencies have been achieved. But the photo-Fenton process showed higher removal efficiency for degradation of 2-chlorophenol than those of other AOPs including the Fenton process and the UV processes. In the photo-Fenton process, the optimal experimental conditions of 2-chlorophenol degradation were obtained at pH 3 and the $Fe^{2+}/H_2O_2$molar ratio of 1. Also the 2-chlorophenol removal efficiency increased with decreasing of the initial 2-chlorophenol concentration. 3-chlorocatechol and chlorohydroquinone were identified as photo-Fenton reaction intermediates, and a degradation pathway of 2-chlorophenol in the aqueous phase during the photo-Fenton reaction was proposed.

Three Separate Pathways for the Initial Oxidation of Limonene, Biphenyl, and Phenol by Rhodococcus sp. Strain T104

  • Kim, Dockyu;Park, Min-Jung;Koh, Sung-Cheol;So, Jae-Seong;Kim, Eungbin
    • Journal of Microbiology
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    • v.40 no.1
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    • pp.86-89
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    • 2002
  • Rhodococcus sp. strain T104, which is able to grow on either biphenyl or limonene, was found to utilize phenol as sole carbon and energy sources. Furthermore, T104 was positively identified to possess three separate pathways for the degradation of limonene, phenol, and biphenyl. The fact that biphenyl and limonene induced almost the same amount of catechol 1,2-dioxygenase activity indicates that limonene can induce both upper and lower pathways for biphenyl degradation by T104.