• 제목/요약/키워드: Organic material

검색결과 3,466건 처리시간 0.03초

항균제를 이용한 알루미늄 표면에 생물막 형성 억제효과 분석 (Study of Effectiveness of Antimicrobial on Restraining Formation of Biofilms on the Surface of Aluminum)

  • 박상준;오영환;조보연;최미연;현민우;정재현;김의용
    • KSBB Journal
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    • 제30권2호
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    • pp.69-76
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    • 2015
  • The antibacterial activity of a antimicrobial (organic synthetic or organic natural material) on the bacteria (Bacillus megaterium, Arthrobacter oxydans, Micrococcus luteus, Methylobacterium aquaticum) detected in the automobiles showed 99.9% bacteria decrease rate within 30 min of being in contact with the tested bacteria culture. The MIC of the organic synthetic material based antimicrobials and the organic natural material based antimicrobial on the bacteria were 31~500 mg/mL and 8~250 mg/mL, respectively. The bacteria and biofilms were formed on the surface of aluminum after 5 ~8 days in the case of addition of the organic synthetic material based antimicrobial to the MIC values for the tested bacteria culture. On the other hand, there was no proliferation of bacteria and formation of biofilms on the surface of aluminum even after 30 days in the case of addition of the organic natural material based antimicrobial to the MIC values for the tested bacteria culture. As a result, the organic natural material based antimicrobial was confirmed to be more excellent effect of inhibition of bacterial proliferation and restraint of biofilms formation than the organic synthetic material based antimicrobial.

유기물 처리가 간척지 토양의 입단형성에 끼치는 영향 (Effect of Organic Material Treatments on Soil Aggregate Formation in Reclaimed Tidelands)

  • 손재권;조재영
    • 한국토양비료학회지
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    • 제42권3호
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    • pp.201-206
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    • 2009
  • 신선유기물 (이탈리안 라이그라스), 신선유기물 + 부산물비료 그리고 부산물비료 처리 후 3년 동안 토양입단 발달상태를 조사한 결과, 토양별로는 모래 함량이 상대적으로 높은 새만금 간척지 토양 보다는 미사와 점토함량이 높은 고흥 간척지 토양에서의 입단형성이 더 양호한 것으로 나타났다. 유기물 자원 처리별로는 고흥 간척지 토양에서는 유의성 있는 차이가 나타나지 않았으나 (P<0.05), 새만금 간척지 토양에서는 녹비 형태의 신선 유기물 즉, 이탈리안 라이그라스를 처리한 시험구에서 가장 입단화도가 높게 나타났다. 유기물 종류별로는 이탈리안 라이그라스와 같은 신선 유기물을 단독 처리한 시험구에서 토양 입단의 중량평균직경이 가장 크게 나타났다. 간척지 토양의 물리성 및 토양구조 개선을 위한 유기물 처리시 신선유기물의 처리가 바람직하며, 불가피할 경우 일반 유기질/부산물비료의 단독처리보다는 신선유기물과 혼합하여 처리하는 것이 타당한 것으로 조사되었다.

유기 박막의 EL특성 (Electroluminescent Characteristics of Organic Thin Films)

  • 송진원;최용성;이경섭
    • 한국전기전자재료학회논문지
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    • 제20권2호
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    • pp.178-182
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    • 2007
  • Electroluminescent (EL) devices based on organic thin films are considered to be one of the next generation of flat-panel displays. In this paper, we have investigated electro-luminescent (EL) characteristics of organic EL device using $Alq_{3}$, PBD as emitting material. Current and luminance can be seen that express a similar relativity in voltage and could know that luminance is expressing current relativity.

전도체 형성 방법에 따른 유무기 복합재료 안테나의 고주파 특성 (Microwave Properties of Organic-inorganic Composite Material Antenna with Various Fabrication Method of Conduction Material)

  • 박상훈;성원모
    • 한국전기전자재료학회논문지
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    • 제19권9호
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    • pp.832-837
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    • 2006
  • Antennas were fabricated by physical(adhesive) and chemical(deposition+plating) method on organic-inorganic composite material. And antennas were measured dielectric constant and gain. Dielectric constant of antennas were fabricated by physical method was decreased with increase of adhesive tape thickness and number of conduction material composition. But antennas were fabricated by chemical method was reached to 90 % of dielectric material. Gain of antennas were fabricated by physical method was decreased with increase of adhesive tape thickness. But they were unrelated with conduction material composition. The other side antennas were fabricated by chemical method excelled more 0.8 dBic than antennas were fabricated by physical method in gain of antenna. Finally, chemical method can expect excellent product process because it can produce smaller size, higher gain and elimination of many handworks.

유화확산법을 이용한 피톤치드오일 함유 폴리입실론카프로락톤 나노캡슐의 제조와 성질(1) (Preparation and Properties of Poly($\varepsilon$-caprolactone) Nanocapsules Containing Phytoncide Oil by Emulsion-diffusion Method(1))

  • Jeong, Cheon-Hee;Kim, Hea-In;Park, Soo-Min
    • 한국염색가공학회:학술대회논문집
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    • 한국염색가공학회 2008년도 제38차 학술발표대회
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    • pp.114-116
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    • 2008
  • Poly(${\varepsilon}$-caprolactone) nanocapsules(nanoPCL) containing phytoncide oil were synthesized by emulsion diffusion method using ethyl acetate as organic solvent. The influence of the degree of hydrolyzation of poly(vinyl acohol) used as an emulsion stabilizer, and the different weight ratio of core material to wall material on the particle size, morphology, and emulsion stability was investigated to design nanocapsules. The encapsulated nanoPCL were characterized by FT-IR spetrometry, Scanning electron microscope, Differential scanning calorimetry, and Thermogravimetry analysis, respectively.

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