• 제목/요약/키워드: available life

검색결과 1,709건 처리시간 0.029초

Feeder Independent Culture of Mouse Embryonic Stem Cells

  • Kim, Myoung Ok;Ryoo, Zae Young
    • Reproductive and Developmental Biology
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    • 제36권4호
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    • pp.291-294
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    • 2012
  • Embryonic stem cell classically cultured on feeder layer with FBS contained ES medium. Feeder-free mouse ES cell culture systems are essential to avoid the possible contamination of nonES cells. First we determined the difference between ES cell and MEF by Oct4 population. We demonstrate to culture and to induce differentiation on feeder free condition using a commercially available mouse ES cell lines.

생태계로서의 인터넷 (Internet As an Ecosystem)

  • 고성범
    • 한국생물공학회:학술대회논문집
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    • 한국생물공학회 2000년도 춘계학술발표대회
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    • pp.98-101
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    • 2000
  • The Internet can be considered as a good environment for dwelling of many types of virtual lives. If we could build up the proper ecosystem with the lives in the internet, It would be possible to implement the system as a life. The life system thus obtained would provide us some decisive advantages, which is hardly available by the reduction paradigm. In this paper, we presented an ecosystem based on Internet, which will be followed by the discussion of its meaning in terms of usefulness.

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Two New Species of Hydropsychidae (Insecta: Trichoptera) from the Philippines

  • Uy, Christine Jewel C.;Bae, Yeon Jae
    • Animal Systematics, Evolution and Diversity
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    • 제33권1호
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    • pp.33-36
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    • 2017
  • Two new Hydropsychidae (Insecta: Trichoptera) species from the Philippines are described. Hydropsyche philippinensis, n. sp., differs from other congeners in the structure of the phallic apparatus. Diplectrona lagunensis, n. sp., can be distinguished from other congeners by its distinct white band pattern in the forewings and by the structure of the phallus. Both new species were collected from a high mountain stream in the northern part of the Philippines. Paratype materials were barcoded to make the sequences readily available in the GenBank.

유용한 생체고분자 키틴 (Available Biopolymer Chitin)

  • 안창범;김세권;이응호
    • 생명과학회지
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    • 제3권2호
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    • pp.91-114
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    • 1993
  • 키틴은 N-아세틸-D-글루코사민 잔기가 다수 beta-(1, 4) 결합하고 있는 다당류이고, 그 탈아세틸화물을 키토산이라 한다. 키토산도 D-글루코사민의 beta-(1, 4) 중합체이지만 보통 약간의 아세틸기를 가지고 있는 것을 키토산이라 부르고 있다. 현재로는 제조 키틴의 대부분이 키토산으로 변환되어 응집제로서 폐수처리에 이용되고 있고, 기타 많은 용도가 개발되어 있지만 아직 연구단계에 있다. 따라서 키틴이나 키토산 분자의 잠재적 기능을 개발하여 인간생활에 유효하게 이용하도록 한다는 것은 폐기물 처리나 미이용 지원의 개발이라는 측면에서 볼 때 중요한 문제라고 볼 수 있다. 따라서 본고에서는 키틴의 생물계에서의 분포, 입체배좌, 제조법, 물성 및 기능성 그리고 그 용도에 대해 간추렸다.

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다단계 모의 열화재의 재료강도 평가와 수명예측 (Strength Evaluation and Life Prediction of the Multistage Degraded Materials)

  • 권재도;진영준;장순식
    • 대한기계학회논문집
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    • 제17권9호
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    • pp.2271-2279
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    • 1993
  • In the case of life prediction on the structures and machines after long service, it is natural to consider a degradation problems. Most of degradation data form practical structures are isolated data obtained at the time of periodical inspection or repair. From such data, it may be difficult to obtain the degradation curve available and necessary for life prediction. In this paper, for the purpose of obtaining a degradation curves, developed the simulate degradation method and fatigue test and Charpy impact test were conducted on the degraded, simulate degraded and recovered materials. Fatigue life prediction were conducted by using the relationship between fracture transition temperature (DBTT : vTrs) obtained from the Charpy impact test through the degradation process and fatigue crack growth constants of m and C obtained from the fatigue test.

Generalized Replacement Demand Forecasting to Complement Diffusion Models

  • Chung, Kyu-Suk;Park, Sung-Joo
    • 대한산업공학회지
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    • 제14권1호
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    • pp.103-117
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    • 1988
  • Replacement demand plays an important role to forecast the total demand of durable goods, while most of the diffusion models deal with only adoption data, namely initial purchase demand. This paper presents replacement demand forecasting models incorporating repurchase rate, multi-ownership, and dynamic product life to complement the existing diffusion models. The performance of replacement demand forecasting models are analyzed and practical guidelines for the application of the models are suggested when life distribution data or adoption data are not available.

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자동차 휠 베어링 유닛의 장수명 설계 (A Design of an Automotive Wheel Bearing Unit for Long Life)

  • 윤기찬;최동훈
    • 대한기계학회논문집A
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    • 제24권2호
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    • pp.319-328
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    • 2000
  • This paper presents a new design method of the 1 generation wheel bearing unit using a numerical optimization technique in order to increase bearing fatigue life. For calculating the fatigue life, a method of load analysis is studied on the automotive wheel bearing system. The design variables selected are ball size, initial contact angle, number of balls, pitch diameter, pre-load, and distance between ball centers. The method of feasible directions in ADS (Automated Design Synthesis) is utilized to automatically find the optimum design variables. To validate the design method, a computer program is developed and applied to a practical passenger car model. The optimum design results demonstrated the effectiveness of the proposed design method showing that the system life of the optimally designed wheel bearing unit is enhanced in comparison with that of the initial ones within the given available design space.

변동하중하의 피로수명예측 (Fatigue Life Predictions for Variable Load Histories)

  • 하재선;송지호;이시중
    • 대한기계학회논문집
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    • 제12권4호
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    • pp.760-780
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    • 1988
  • 본 연구에서는 변동하중하의 피로수명 예측법에 관하여 미국 자동차공학회 (SAE) 피로손상분과의 광범위한 연구결과를 이용하여, 거시적인 피로균열 발생까지의 수명을 대상으로 검토한 것이다. 특히 현장에서 많이 직면하는, 재료의 피로특성에 관한 데이터가 거의 없는 경우에 대해서도 검토하고 있다.

Analysis of Expressed Sequence Tags of the Spider, Araneus ventricosus

  • Chung, Eun-Hwa;Lee, Kwang-Sik;Han, Ji-Hee;Sohn, Hung-Dae;Jin, Byung-Rae
    • International Journal of Industrial Entomology and Biomaterials
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    • 제3권2호
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    • pp.191-199
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    • 2001
  • We have constructed a cDNA library from the whole body of the spider, Araneus ventricosus. Sequence analysis of randomly selected cDNA clones was performed to obtain genetic information on the spider A. ventricosus, of which genetic information is currently not available. We have partially sequenced randomly selected 385 clones of the cDNA library constructed from A. ventricosus. This expressed sequence tags (EST) analysis revealed 383 genes had high homologies to known genes in GenBank. In this report, 241 independent genes were analyzed in detail.

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장수명공동주택의 유지관리업무프로세스 구축에 관한 연구 - 관리자를 위한 유지관리업무프로세스를 중심으로 - (Study on the Development of Maintenance Process in Long-Life Housing - Focus on the Development of Maintenance Process for the Manager -)

  • 지장훈;김수암;윤상조
    • 한국주거학회:학술대회논문집
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    • 한국주거학회 2009년 춘계학술발표대회 논문집
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    • pp.344-349
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    • 2009
  • To be Low Carbon and Green Growth, it is necessary that Long-Life Housing based on Green Technology is supplied. The main concern at the moment is developing Sustainable Housing relative to Life-Cycle or Life-Style of the residents, and the resident of Remodeling or Redevelopment. This study is aim to be Development of Maintenance Process in order to make steady dwelling when supplying Long-Life Housing that separates Support(Skeleton) and Infill different from the existing Short-Life Housing, and has durability, alterability, available remodeling, easy maintenance. Long-Life Housing should consider the maintenance about movement and variableness. In contrast, the maintenance of the existing Housing is regular maintenance, change and repair by damage. As well as Long-Life Housing should be demanded proper Development of Maintenance Process because of difference of Housing in concept, design and Construction. Therefore, this study looks into problems when applying Development of Maintenance Process in Long-Life Housing, and shows Development of Maintenance Process about the efficient Long-Life Housing for the manager.

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