• 제목/요약/키워드: Morphological features

검색결과 832건 처리시간 0.025초

Characterization of Potential Probiotics Bacillus subtilis CS90 from Soybean Paste (Doenjang) and Its Antimicrobial Activity against Food-borne Pathogens

  • Cho, Kye-Man
    • Journal of Applied Biological Chemistry
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    • 제51권6호
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    • pp.285-291
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    • 2008
  • A potential probiotics bacterial strain, CS90, was isolated from Korean soybean paste (doenjang). The strain CS90 showed antimicrobial activity against food-borne pathogenic bacteria including Salmonella enterica, Salmonella enteritids, Salmonella typhymurium, Bacillus cereus, Listeria ivanovii, Listeria. monocytogenes, Sthaphylococcus aureus, and Sthaphylococcus epidermidis and showed a significant survival rate of 35.7 to 57.8% under the artificial gastric acidic condition (pH 2 to 3). The strain CS90 was classified as Bacillus subtilis based on morphological, physiological, chemotaxonomic features and phylogenetic analysis based on 16S rDNA sequence and designated as B. subtilis CS90. B. subtilis CS90 can be used as a potential probiotics.

미량 Sn을 함유한 AZ91 마그네슘 합금의 미세조직 및 기계적 특성 (Microstructure and Mechanical Properties of AZ91 Magnesium Alloy Containing a Small Amount of Sn)

  • 전중환
    • 열처리공학회지
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    • 제27권3호
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    • pp.115-120
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    • 2014
  • Microstructural features were comparatively investigated in AZ91 (Mg-9%Al-1%Zn) and AZ91-0.5%Sn alloys, in order to clarify the reason for the enhancement in room temperature tensile properties by the addition of small amount of Sn in Mg-Al-based alloy. In as-cast state, the Sn-containing alloy showed increased YS, UTS and elongation than the Sn-free alloy. The microstructural examination revealed that various factors including finer cell size, reduction of lamellar (${\alpha}+{\beta}$) phase and morphological change of bulky ${\beta}$ phase from partially divorced shape to fully divorced shape, are likely to be responsible for the improvement in tensile properties for the Sn-containing alloy. It is noted that two alloys showed similar tensile properties after solution treatment. This implies that microstructural evolution related to the ${\beta}$ phase plays a key role in better tensile properties in the Sn-containing alloy.

Plant Growth Promotion and Suppression of Root Disease Complex due to Meloidogyne incognita and Fusarium oxysporum by Fluorescent Pseudomonads in Tomato

  • Kumar, Tarun;Bajpai, Vivek K.;Maheshwari, Dinesh Kumar;Kang, Sun-Chul
    • Journal of Applied Biological Chemistry
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    • 제48권2호
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    • pp.79-83
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    • 2005
  • While screening for nematicidal activity of bacterial origins, various pseudomonads strains were inhabited in tomato rhizosphere. One isolate designated as $PE_{10}$ was selected for studies on nematicidal properties and plant growth-promoting (PGP) activity and was identified as Pseudomonas aeruginosa based on morphological features, biochemical and physiological tests, and carbohydrate utilization. To investigate nematicidal activity, Meloidogyne incognita juvenile mortality was determined using $PE_{10}$ culture filtrate. Inhibition of strain $PE_{10}$ against Fusarium oxysporum was observed using dual culture technique. Strain $PE_{10}$ showed good siderophore activity, HCN and IAA production abilities, and growth and development enhancement of tomato.

Giant Lymph Node Hyperplasia (Castleman's Disease) as a Rare Cause of Back Pain

  • Kim, Kyoung-Han;Kim, Sang-Dae;Kim, Se-Hoon;Park, Jung-Yul
    • Journal of Korean Neurosurgical Society
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    • 제43권3호
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    • pp.169-171
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    • 2008
  • Giant lymph node hyperplasia (Castleman's disease) is a nonneoplastic lymphoproliferative disorder of unknown etiology that usually occurs in the chest. Its morphological recognition is based on a composition of various histological features. The mass is often asymptomatic, but it can cause nonspecific thoracic symptoms, such as regional pain. This disease can be found wherever lymph nodes are present, but two-thirds of these tumors are found in the chest, along the tracheobronchial tree in the mediastinum or lung hilus. However, we experienced an unusual case of Castleman's disease as a cause of back pain that was localized in the posterior mediastinum bordering the chest wall.

고주파 플라즈마 CVD에 의한 저 압력에서의 다이아몬드 막의 성장 (Deposition of diamond film at low pressure using the RF plasma CVD)

  • 구효근;박상현;박재윤;김경환
    • 대한전기학회논문지:전기물성ㆍ응용부문C
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    • 제50권2호
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    • pp.49-56
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    • 2001
  • Diamond thin films have been deposited on the silicon substrate by inductively coupled radio frequency plasma enhanced chemical vapor deposition system. The morphological features of thin films depending on methane concentration and deposition time have been studied by scanning electron microscopy and Raman spectroscopy. The diamond particles deposited uniformly on silicon substrate($10{\times}10[mm^2]$) at the pressure of 1[torr], a methane concentration of 1[%], a hydrogen flow rate of 60[sccm], a substrate temperature of $840\{sim}870[^{\circ}C]$, an input power of 1[kw], and a deposition time of 1[hour]. With increasing deposition time, the diamond particles grew, and than about 3 hours have passed, the graphitic phase carbon thin film with "cauliflower-like" morphology deposited on the diamond thin films.

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CCD 컬러 영상과 적외선 영상을 이용한 얼굴 영역 검출 (Facial Region Tracking by Infra-red and CCD Color Image)

  • 윤태호;김경섭;한명희;신승원;김인영
    • 대한전기학회:학술대회논문집
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    • 대한전기학회 2005년도 심포지엄 논문집 정보 및 제어부문
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    • pp.60-62
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    • 2005
  • In this study, the automatic tracking algorithm tracing a human face is proposed by using YCbCr color coordinated information and its thermal properties expressed in terms of thermal indexes in an infra-red image. The facial candidates are separately estimated in CbCr color and infra-red domain, respectively with applying the morphological image processing operations and the geometrical shape measures for fitting the elliptical features of a human face. The identification of a true face is accomplished by logical 'AND' operation between the refined image in CbCr color and infra-red domain.

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한국 미기록 와편모조 4종 (Amphisolenia와 Triposolenia) 형태 (Morphology of Four Dinoflagellate Species (Amphisolenia and Triposolenia) Newly Recorded from Korea)

  • 정민민;김형신
    • 수산해양교육연구
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    • 제25권6호
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    • pp.1239-1244
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    • 2013
  • Morphology of 4 dinoflagellates species, Amphisolenia bidentata, A. inflata, A. thrinax and Triposolenia bicornis, which belong to the Dinophysiales, were studied by light and scanning electronmicroscope. The plankton samples for this study were collected from Jeju-Do, South Korea in February, April, September and November 2007. Three Amphisolenia species have large cell size ($125{\sim}890{\mu}m$) then T. bicornis ($45{\sim}50{\mu}m$). Cells of Amphisolenia and Triposolenia with unique morphological features were divided into the head, neck, anterior part of the body (APB), mid-body and posterior process. This is the first record of those four species from Korea.

LGKMA의 구조 및 특성 (The structure and features of the LGKMA)

  • 곽종근;은종진;강윤선
    • 한국정보과학회 언어공학연구회:학술대회논문집(한글 및 한국어 정보처리)
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    • 한국정보과학회언어공학연구회 1999년도 제11회 한글 및 한국어 정보처리 학술대회 및 제1회 형태소 분석기 및 품사태거 평가 워크숍
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    • pp.137-144
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    • 1999
  • LGKMA 시스템은 형태소 분석기와 품사 태거 및 명사 추출기로 구성되며, LG 종합기술원에서 연구 개발 중인 다국어 정보 검색, 음성 합성, 개인정보처리 에이전트 및 디지털 TV의 프로그램 안내문을 분석, 검색하는 EPG(Electronic Program Guide) 응용 둥 다양한 응용 프로그램에서 사용되고 있다. 본 논문에서는 형태소 분석기와 태거의 기반 기술보다는 LGKMA(LG Korean Morphological Analyser)의 전반적인 구조와 다른 시스템과 비교했을 때의 특성, 그리고 실제 응용되는 사례를 소개하고자 한다. 또 표준화를 위해서 열렸던 MATEC99에 참가하기 위해서 수행했던 작업들을 보고한다.

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한국산 동자개과 어류의 계통분류학적 연구 III. 골격형질의 다변량 분석 (Systematic Studies on the Bagrid Catfish (Siluriformes: Bagridae) from Korea III. Multivariate Analysis of Osteological Characters)

  • 이충렬
    • 한국동물학회지
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    • 제32권3호
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    • pp.252-257
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    • 1989
  • 우리 나라 서남해안에 유입되는 하천에 주로 서식하고 있는 동자개과 어류 110 개체의 골격표본을 중심으로 12개 골격형질을 추출하여 이들의 분류학적 위치와 계통관계를 조사하였다. 그 결과 한국산 동자개과 어류는 종전의 4속에서 2속으로 즉 Pseudobagrus속과 Leiocassis속으로 분류되었으며, Pseudobagrus속에는 P. fulvidraco, Pseudobagrus sp., P. brevicorpus이고 Leiocassis속에는 L. nitidus와 L. ussuriensis가 해당 되었다. 또한 지금까지는 P. brevicorpus는 Pseudobagrus sp.와 가까운 관계로 알고 있었으나 그 보다는 오히려 P. fulvidraco와 더욱 가까운계통관계로 나타났다.

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A New Record of Microarthridion littorale (Copepoda, Harpacticoida, Tachidiidae) from Korea with Taxonomic Note on the Species

  • Kim, Jong Guk;Choi, Hyun Ki;Yoon, Seong Myeong
    • Animal Systematics, Evolution and Diversity
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    • 제32권3호
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    • pp.207-218
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    • 2016
  • A harpacticoid copepod, Microarthridion littorale (Poppe, 1881), is newly recorded in Korea. Microarthridion species can be distinguished from each other by a combination of the number of the antennular segment, the number of the seta on the antennary exopod, and the armature of the thoracopod legs. Korean materials examined coincide well with M. littorale on these well-known characteristics. However, there are some minor differences in the ornamentations of the maxilliped and swimming legs. The specimens show additional sexual dimorphisms in the setae on enp-3 of P1 and exp-3 of P2-P4. Morphological diversity of so-called M. littorale is also discussed here with detailed features.