Abstract:
PROBLEM TO BE SOLVED: To provide a method for improving storage stability of an algaecidal virus against red tide, in order to prevent reduction in algaecidal ability to algae to be infection object, since a large-sized DNA virus having algaecidal activity against red tide-causing algae is readily deactivated by light and a water temperature, although activity is kept to some extent by preservation under light shielding and low-temperature conditions and in order to further improve preservability, wherein antibiotics and glycerol as a protecting agent are added to the algaecidal virus against red tide. SOLUTION: The method for improving storage stability of the virus comprises adding streptomycin sulfate (50-5,000 ppm) and chloramphenicol (5-500 ppm) and glycerol (1-20%) to a suspension of HaV (Heterosigma akashiwo virus) being an algaecidal virus against Heterosigma akashiwo of harmful red tide-causing alga and HcV (Heterocapsa circularisquama virus) being an algaecidal virus against Heterocapsa circularisquama. COPYRIGHT: (C)2006,JPO&NCIPI
Abstract:
PROBLEM TO BE SOLVED: To provide a new virus which specifically infects algae in Cryptophyte, Teleaulax and proliferates. SOLUTION: This virus having the following forms and biological properties infects algae in Cryptophyte, Teleaulax and proliferates to control or inhibit the proliferation of the algae. (Form) total length: 0.01 to 0.4 μm; shape of the virus: spherical; particle size: 130 to 260 nm; the structure of a tail portion, and the structure of an outer membrane are absent; shape of capsid: regular icosahedron; genome: double-strand DNA. (Biological properties) the virus does not exhibit infectivity or alga solubility to the algae of Bacillariophyceae, Eustigmatophyceae, Dinophyceae and Raphidophyceae classes. COPYRIGHT: (C)2009,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To provide cyanophage capable of specifically infecting the water bloom-causing blue-green algae of the genus Microcystis and proliferating, to provide a method for controlling water bloom with the cyanophage, to provide an agent for controlling water bloom, to provide a method for isolating the cyanophage, to provide a method for concentrating/purifying, to provide a subculture method, and to provide a preservation method. SOLUTION: The cyanophage having a total length of 0.01 to 0.4 μm and capable of specifically infecting the algae of the genus Microcystis and proliferating. The method for isolating the cyanophage includes a process for filtering a liquid sample containing the cyanophage with a filter, inoculating the obtained filtrate into a solution for culturing the algae of the genus Microcystis, culturing the cyanophage, and then subjecting the alga dissolution-observed culture solution to a limiting dilution treatment to clone the cyanophage. The agent for controlling water bloom contains the cyanophage as an active ingredient. The method for controlling water bloom comprises spraying the cyanophage on a water area. The method for concentrating/purifying the cyanophage, the subculture method, and the preservation method. COPYRIGHT: (C)2006,JPO&NCIPI
Abstract:
PROBLEM TO BE SOLVED: To provide a method for concentratedly obtaining high-density viruses in a short period of time in artificially mass producing useful algaecidal viruses against red tide-causing algae. SOLUTION: The method for concentratedly obtaining high-density viruses comprises controlling HaV (Heterosigma akashiwo virus) being an algaecidal virus of Heterosigma akashiwo of harmful red tide-causing alga and HcV (Heterocapsa circularisquama virus) being an algaecidal virus of Heterocapsa circularisquama by the amounts and the species of viruses to be inoculated to each culture solution of host plankton. COPYRIGHT: (C)2006,JPO&NCIPI
Abstract:
PROBLEM TO BE SOLVED: To provide virus growable/algilytic by specifically infecting on red tide-derived diatom Rhizosolenia, to provide a method and an agent for controlling the red tide using the virus, and to provide respective methods for isolating, subculturing and storing the virus. SOLUTION: The virus is smaller than 0.1μm in particle size. The method for isolating the virus comprises filtering a liquid sample containing the virus via a 0.1μm-perforation filter, inoculating the filtrate into a culture fluid of diatom Rhizosolenia to culture the diatom, and carrying out a limiting dilution of the resultant culture fluid where an algilysis of the diatom is observed to clone the virus. The red tide-controlling agent comprises the virus as the active ingredient. The method for controlling the red tide comprises spreading red tide waters with the virus. The respective methods for isolating, subculturing and storing the virus are also provided. COPYRIGHT: (C)2004,JPO
Abstract:
PROBLEM TO BE SOLVED: To provide a formulation for controlling noxious planktons killing or suppressing the noxious planktons or carrying out prophylaxis of mass proliferation of the noxious planktons by using useful microorganisms. SOLUTION: The formulation for controlling the noxious planktons is obtained by immobilizing the microorganisms having an ability to control the noxious planktons in a gel-ike material. The microorganisms having the ability to control the noxious planktons are preferably bacteria or viruses in the formulation for controlling the noxious planktons and even microorganisms using the noxious planktons as a host. The formulation is obtained by embedding the useful microorganisms having the ability to control the noxious planktons such as algae causing red tide in a gel-forming component such as a water absorbing resin or a thickener, immobilizing the microorganisms while having the ability to control the noxious planktons and preparing the formulation with a composition suitable for the application environment. The useful microorganisms can practically be applied to the control of the noxious planktons such as the algae forming the red tide in the formulation. A method for preparing the formulation and a technique for controlling the noxious planktons using the microbial formulation can be provided. COPYRIGHT: (C)2005,JPO&NCIPI