• 제목/요약/키워드: blocking agent

검색결과 165건 처리시간 0.025초

위험물 탱크로리 화재진압 방안 (Dangerous tanker fire fighting measures)

  • 이정일
    • 대한안전경영과학회:학술대회논문집
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    • 대한안전경영과학회 2012년 추계학술대회
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    • pp.215-223
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    • 2012
  • Or maybe moving dangerous goods tanks of motorists excluded from the scope of the supervision of the fire department and fire prevention education as a blind spot on the part of a large party evidence of markers of contamination loading of dangerous goods according to the type of education that can be handled only by preparing the institutional arrangements accident is blocking the moving path of Dangerous Goods moving tanks and loading dangerous goods on fire budget move the path that corresponds to the report received by securing the extinguishing agent is required to neutralize the ash and fire suppression and repression through skills training from large disasters in advance blocking devices should prepare that will.

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The flow of $CO_{2}$ and $N_{2}$ gases through Asymmetric polytherimide Membrane

  • Park, You-In;Lee, Kew-Ho
    • 한국막학회:학술대회논문집
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    • 한국막학회 1995년도 제3회 심포지움 (분리막 연구의 최신동향)
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    • pp.73-85
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    • 1995
  • The asymmetric hollow fiber membranes were prepared by the wet spining of polyetherimide dope solution and the effect of hollow fiber structures on the permeation characteristics of carbon dioxide and nitrogen gases through these membrane were investigated. As the concentration of the $\gamma$-butyrolactone (GBL) in dope solution, acting as a swelling agent was increased, the structure of hollow fiber was changed from the finger to sponge type. The permeabilities of gases (CO$_{2}$, N$_{2}$) through these membrane were measured over the wide range of pressure under different temperature. The effect of water vapor on the permeabilities of gases was also investigated. The measured permeabilities showed the different characteristics depending on the structure of membranes. It was found that the flow through the pores were dominant over the polymers matrix. Blocking effect by water vapor in the pores of skin layer greatly improved the ideal separation factor of carbon dioxide/nitrogen.

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Floridoside suppresses pro-inflammatory responses by blocking MAPK signaling in activated microglia

  • Kim, MinJeong;Li, Yong-Xin;Dewapriya, Pradeep;Ryu, BoMi;Kim, Se-Kwon
    • BMB Reports
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    • 제46권8호
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    • pp.398-403
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    • 2013
  • Inflammatory conditions mediated by activated microglia lead to chronic neuro-degenerative diseases such as Alzheimer's, Parkinson's, and Huntington's diseases. This study was conducted to determine the effect of floridoside isolated from marine red algae Laurencia undulata on LPS (100 ng/ml) activated inflammatory responses in BV-2 microglia cells. The results show that floridoside has the ability to suppress pro-inflammatory responses in microglia by markedly inhibiting the production of nitric oxide (NO) and reactive oxygen species (ROS). Moreover, floridoside down-regulated the protein and gene expression levels of iNOS and COX-2 by significantly blocking the phosphorylation of p38 and ERK in BV-2 cells. Collectively, these results indicate that floridoside has the potential to be developed as an active agent for the treatment of neuro-inflammation.

이동 에이전트 컴퓨팅 환경에서 공간적 복제 기반 기법을 위한 이동 에이전트 위치관리 프로토콜 (Mobile Agent Location Management Protocol for Spatial Replication-based Approach in Mobile Agent Computing Environments)

  • 윤준원;최성진;안진호
    • 정보처리학회논문지A
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    • 제13A권5호
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    • pp.455-464
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    • 2006
  • 다중 지역으로 구성된 이동 에이전트 컴퓨팅 환경에서 공간적 복제 기반 기법(SRBA: Spatial Replication-Based Approach)은 에이전트의 고장발생 시에도 그 에이전트의 수행이 대기 없이 계속적으로 진행될 수 있도록 하기 때문에, 대표적인 이동 에이전트 결함 포용 기법으로 사용될 수 있다. 그러나 이 기법을 실제의 이동 에이전트 기반 컴퓨팅 시스템에 적용하는데 있어서, 단계별로 복제된 이동 에이전트들에 대한 위치추적 및 관리비용을 최소화시키는 것이 필수적이다. 본 논문에서는 이러한 문제점을 해결하는 새로운 이동 에이전트 위치 관리 프로토콜인 SRLM(Location Management protocol for Spatial Replication)을 제안한다. 제안된 프로토콜은 단계군 내의 복제된 이동 에이전트들 중 대표 작업자만이 자신의 지역서버에게 위치등록하게 함으로써 기존 프로토콜에 비해 위치갱신 및 메시지 전달 비용을 매우 줄인다. 또한, 이 프로토콜은 한 단계 군에서의 대표 작업자 결함 발생시 새로운 대표 작업자의 선출로 인한 위치 관리 문제를 해결한다.

음이온성 syntan을 이용한 나일론 6.6 섬유의 흡착거동 및 오염방지성 (Application of an Anionic Syntan on Nylon 6.6 Fibers: Exhaustion Properties and Staining Resistance)

  • 손영아;홍진표;김태경
    • 한국염색가공학회지
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    • 제15권6호
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    • pp.18-26
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    • 2003
  • Nylon 6.6 was treated with anionic synthetic tanning agent at different pH values, temperatures and liquor ratios to determine exhaustion properties. Treatments using syntan were conducted to the undyed nylon 6.6 fiber and three acid dyeings and then samples of the bath solution were subjected to HPLC analysis. Mass analysis was considered to determine the syntan components. In addition, the effect of applications using syntan and syntan/cation in improving the stain resistance was observed. The optimum treatment condition of syntan was achieved and the major component of syntan, being exhausted to the nylon substrates, was determined. In terms of stain blocking effect, a significant improvement was achieved by the syntan and syntan/cation treatments.

An Architecture for Certificate and Agent Based E-mailing to Block Spam Mail

  • Nam, Sang-Zo
    • 지능정보연구
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    • 제9권2호
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    • pp.39-50
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    • 2003
  • Deleting unsolicited email, popularly known as spam mail, is an annoying task for Internet users. Moreover, spam mail causes a variety of social problems. At present, legal restrictions cannot eradicate spam senders. As a result, many technical methods to eliminate spam mail such as spam filtering and online stamps have been introduced. However, the process of blocking spam mail can inadvertently result in suspension of indispensable or beneficial communication. In this paper, we propose a certificate and agent based emailing architecture that can block spam mail, while at the same time approve certified mail. This architecture can be accelerated by synergistic utilization of digital signature and electronic document interchange.

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한쪽 신동맥내 Debrisoquin의 항이뇨작용기전 (Mechanism on the Antidiuretic Action of Debrisoquin Infused into a Renal Artery in Dog)

  • 고석태;유강준;신동숙;이수연
    • Biomolecules & Therapeutics
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    • 제3권2호
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    • pp.136-142
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    • 1995
  • This study was performed in order to certify the antidiuretic action and to investigate the mechanism of antidiuretic action of debrisoquin infused into a renal artery in dog. Debrisoquin, when infused into a renal artery, exhibited the antidiuretic action accompanied the reductions of glomerular filtration rate and renal plasma flow, and the decreased amounts of sodium and potassium excreted in urine, limited only to the infused side, while control kidney function remained unchanged at all. The antidiuretic action of debrisoquin infused into a renal artery was blocked by pretreament of prazosin, $\alpha$$_1$-adrenergic blocking agent, or reserpine, catecholamine depleting agent. These results suggest that debrisoquin infused into a renal artery elicits antidiuretic action through indirect stimulation of renal sympathetic nerves.

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새로운 항암제 DA-125의 유전자 복제 억제 기작 (Inhibitory Mechanism of a New Antitumor Agent DA125 on DNA Replication)

  • 이상광;김도진;오유택;이상득;우은란;신차균
    • 약학회지
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    • 제43권5호
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    • pp.623-628
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    • 1999
  • DA-125, a new antitumor agent, was compared with adriamycin, a known DNA intercalator, in terms of inhibitory mechanism of DNA replication by using replicating simian virus 40 (SV40) genome in vivo. In analyzing the SV40 DNA replication intermediates present in cells treated with DA-125, it was not observed to accumulate B-dimers of SV40 DNA which are prominent in adriamycin-treated cells. However, treatment with DA-125 induced dose-dependent formation of DNA-topoisomerase complex which is characteristic of topoisomerase poisons. In addition, DA-125 showed more efficient in inhibiting SV40 DNA replication than adriamycin. Therefore, on the basis of this observation, we suggest that DA-125, a derivative of adriamycin, inhibits DNA replication by blocking topoisomerase activity as a toposomerase poison although adriamycin blocks topoisomerase activity as a DNA intercalator.

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The Role of Intracellular Receptor NODs for Cytokine Production by Macrophages Infected with Mycobacterium Leprae

  • Kang, Tae-Jin;Chae, Gue-Tae
    • IMMUNE NETWORK
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    • 제11권6호
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    • pp.424-427
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    • 2011
  • The nucleotide-oligomerization domain (NOD) proteins are members of the NOD-like receptor (NLR) family, which are intracellular and cytoplasmic receptors. We analyzed the role of NODs for cytokine production by macrophages infected with intracellular pathogen M. leprae, the causative agent of leprosy. Production of pro-inflammatory cytokines such as IL-$1{\beta}$ and TNF-${\alpha}$ was inhibited in the presence of cytochalasin D, an agent blocking phagocytosis, suggesting that intracellular signaling was, partially, required for macrophage activation to M. leprae infection. Next, we investigated the role of NOD1 and NOD2 proteins on NF-${\kappa}B$ activation and cytokine expression. Treatment with M. leprae significantly increased NF-${\kappa}B$ activation and expression of TNF-${\alpha}$ and IL-$1{\beta}$ in NOD1- and NOD2-transfected cells. Interestingly, their activation and expression were inhibited by cytochalasin D, suggesting that stimulation of NOD proteins may be associated with the enhancement of cytokine production in host to M. leprae.

A Proposed Architecture for Certificate and Agent Based E-mailing to Block Spam Mail

  • Nam, Sang-Zo
    • 한국산학기술학회:학술대회논문집
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    • 한국산학기술학회 2003년도 Proceeding
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    • pp.28-34
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    • 2003
  • Deleting unsolicited email, popularly known as spam mail, is an annoying task for Internet users. Moreover, spam mail causes a variety of social problems. At present, legal restrictions cannot eradicate spam senders. As a result many technical methods to eliminate spam mail such as spam filtering and online stamps have been introduced. However, the process of blocking spam mail can inadvertently result in suspension of indispensable or beneficial communication. In this paper, we propose a certificate and agent based emailing architecture that can block spam mail, while at the same time approve certified mail. This architecture can be accelerated by synergistic utilization of digital signature and electronic document interchange.

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