• Title/Summary/Keyword: PFpW-3

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Biological control of Flavobacterium psychrophilum infection in ayu (Plecoglossus altivelis altivelis) using a bacteriophage PFpW-3

  • Kim, Ji Hyung;Park, Se Chang
    • Korean Journal of Veterinary Research
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    • v.58 no.1
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    • pp.39-43
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    • 2018
  • The efficacy of using a bacteriophage (phage) to control Flavobacterium psychrophilum (F. psychrophilum) infection of ayu (Plecoglossus altivelis altivelis) was evaluated in this study. Intramuscular challenge failed to induce sufficient infection levels; therefore, a newly designed net-scratch challenge method was also used to induce bacterial infection. Administration of phage PFpW-3 in F. psychrophilum-infected ayu showed notable protective effects, increased survival rates and mean times to death. Additionally, the fate of inoculated bacteria and phage in ayu were investigated. Our results suggest that the phage PFpW-3 could be considered an alternative biocontrol agent against F. psychrophilum infections in ayu culture.

Reduction of Contraction Coefficient of Acrylic Yarn by PFP Plasma Polymerization (PFP 플라즈마중합에 의한 아크릴 섬유사의 수축률 감소)

  • Kang, Young-Reep
    • Journal of the Korean Applied Science and Technology
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    • v.16 no.4
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    • pp.287-291
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    • 1999
  • Plasma polymerization of Perfluoropropene(PFP) was carried out in a tubular type reactor. The Plasma was generated by coupling inductively under the fixed discharge power of 25W and the pressure of 100, 140, and 200 mTorr of radio frequency generator. PFP plasma polymerization thin films were deposited in acrylic yams. For 1 hours, the acrylic yams treated and untreated by PFP plasma were immersed in boiling water. Then the reduction of contraction coefficient of acrylic yams were measured respectively. As a result of this experiment, untreated acrylic yams were reduced around 23%, while treated yams were contracted about 18-2%.