摘要:
A method comprising passing a culture solution including Bacillus subtilis or gene-recombinated Bacillus thereof through a pipe-like ceramic filter at a flow rate of 2 m/sec or less, the ceramic filter having a filter layer at an inner cylindrical surface thereof, the filter layer being made of spherical particles, and a surface roughness (Rmax) of the inner surface of the ceramic filter being 10 microns or less.
摘要:
The present invention relates to an apparatus for performing a fluoroimmunoassay, the apparatus comprising an excitation light source, a fluorescence detector, an optical fiber for an excitation light from the excitation light source to which an antigen or antibody is bound, and a spectroscope, in which the mentioned antigen or antibody is bound to an outgoing end surface of the optical fiber for the excitation light. In the apparatus the spectroscope is constructed so that it introduces the excitation light emitted from the excitation light source to a incident end surface of the optical fiber for the excitation light and introduces a fluorescence emitted from a fluorescence-labeled antibody or antigen which forms an immunological complex with the antigen or antibody to the fluorescence detector. In the apparatus the outgoing end surface of the optical fiber for the excitation light has a transmittance for the excitation light from the excitation light source. The invention also relates to a sensing chip which is used in the apparatus for performing a fluoroimmunoassay therewith.
摘要:
A biocatalyst is immobilized with a graft product of a polymer and saponified polyvinyl acetate containing a stilbazolium group as a photo-crosslinking group. The polymer is preferably gelatin, collagen, starch, cellulose, gum arabic, tragacanth gum, carrageenan, mannan, dextrin or alginic acid. The graft product is prepared by bonding the polymer to the polyvinyl acetate, either directly through functional groups of the polymer and polyvinyl acetate or through a crosslinking agent. The polymer provides affinity for the biocatalyst and by grafting the polymer to the saponified polyvinyl acetate, damage to cells upon immobilization is reduced. A liquid composition containing a biocatalyst and the graft product is added to an aqueous solution of an inorganic salt or an organic salt to form a granular gel and the gel is irradiated with actinic rays to cure the gel.
摘要:
The present invention is directed to a method for producing an optical fiber having formyl groups on a core surface. In one embodiment, a plastic optical fiber having formyl groups on a core surface is obtained by immersing the core surface of the plastic optical fiber in a treating solution containing at least a 0.5 to 40 mM alkali metal hydroxide and a compound having formyl groups in water or lower alcohol solvent. In the other embodiment, a plastic optical fiber having formyl groups on a core surface is obtained by introducing a vic-diol group, a primary hydroxyl group or an alkenyl group on the core surface, and then oxidizing it. Turbidity on the core surface of the optical fiber thus obtained is minimized, thereby reducing the transmittance losses of light.
摘要:
The present invention provides a G1 transgenic bird or an offspring thereof by: incubating a fertilized avian egg, microinjecting, into the early embryo thereof at a stage except for and after the blastodermic stage just after egg laying, a replication-deficient retroviral vector coding for a useful protein, allowing the egg to hatch out to thereby obtain a G0 transgenic chimeric bird, and mating the G0 transgenic chimeric bird with another G0 transgenic chimeric bird or an offspring thereof or with a wild-type bird. The present invention is a G1 transgenic bird or an offspring thereof by: incubating a fertilized avian egg, microinjecting, into the early embryo thereof at a stage except for and after the blastodermic stage just after egg laying, a replication-deficient retroviral vector coding for a useful protein, allowing the egg to hatch out to thereby obtain a G0 transgenic chimeric bird, and mating the G0 transgenic chimeric bird with another G0 transgenic chimeric bird or an offspring thereof or with a wild-type bird.
摘要:
The present invention provides a protein having a &bgr;1,3-galactosyltransferase activity derived from a microorganism; a DNA encoding the protein; a recombinant DNA containing the DNA and a vector; a transformant obtained by introducing the recombinant DNA into a host cell; a method for producing a protein having a &bgr;1,3-galactosyltransferase activity using the transformant; and a method for producing a galactose-containing carbohydrate using the transformant.
摘要:
The present invention provides a lentivirus vector which comprises a coat protein containing VSV-G; a recombinant bird host which is constructed by infecting a bird host with the lentivirus vector; a method of constructing the same; a transgenic chimeric bird which is constructed by infection with the lentivirus vector and offspring thereof. The present invention also provides a method of constructing a G0 transgenic chimeric bird and offspring thereof which comprises infecting fertilized bird egg early embryos with a lentivirus vector comprising a coat protein containing VSV-G, and incubating the embryos; and a G0 transgenic chimeric bird and offspring thereof which is constructed by the method mentioned above. The present invention provides a transgenic bird which is constructed by infecting a bird early embryos with a lentivirus vector comprising a coat protein pseudotyped with VSV-G.
摘要:
The present invention provides a protein having a β1,3-galactosyltransferase activity derived from a microorganism; a DNA encoding the protein; a recombinant DNA containing the DNA and a vector; a transformant obtained by introducing the recombinant DNA into a host cell; a method for producing a protein having a β1,3-galactosyltransferase activity using the transformant; and a method for producing a galactose-containing carbohydrate using the transformant.
摘要:
The present invention has its object to provide a transgenic bird producing erythropoietin at high concentration levels as well as a method for constructing the same. The present invention provides a G0 transgenic chimera bird as obtained by incubating a fertilized avian egg, infecting the early embryo formed after egg laying, except for the blastoderm stage immediately following egg laying, with a replication-deficient retroviral vector containing a foreign erythropoietin gene and allowing the embryo to hatch.
摘要:
The present invention provides a protein having a β1,3-galactosyltransferase activity derived from a microorganism; a DNA encoding the protein; a recombinant DNA containing the DNA and a vector; a transformant obtained by introducing the recombinant DNA into a host cell; a method for producing a protein having a β1,3-galactosyltransferase activity using the transformant; and a method for producing a galactose-containing carbohydrate using the transformant.