| 摘要 |
PROBLEM TO BE SOLVED: To obtain a stain-proofing and algae-proofing agent of a natural system which eliminates the worry on ocean contamination relating to stain-proofing and algae-proofing methods for fishing nets, ropes, floats, etc. SOLUTION: This stain-proofing and algae-proofing agent prevents the adhesion of microorganisms and alga to fishing gear by the effect of the enzyme of thermophilic bacteria living in the high-temperature seawater of >=80 deg.C. The thermophilic bacteria are subjected to a high-temperature fermentation treatment and are further selectively propagated while the desired bacterium groups are intensified in functions in the environment including the animals and plants for pest control. Porous materials in the form of fine powder which are carriers for the thermophilic bacteria to be propagated are added as side materials to the agent described above and if necessary, a binder or glue to impart adhesive power to the fishing gear, etc., are added thereto. The fishing nets, etc., to be subjected to the stain-proofing and algae-proofing treatment are immersed into a dispersion of the selectively propagated thermophilic bacteria and the carriers and are dried. The use of the stain-proofing and algae-proofing agent by incorpolating the agent into a coating material is possible as well.
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