摘要:
Expression plasmids containing the full cDNA sequence of calf prochymosin and capable of expressing prochymosin gene in E. coli host cells are disclosed. A method is described for the preparation of said plasmids which comprises altering the spacing between the SD and ATG sequences within the E. coli trp promoter-operator region of the parent expression plasmid, pCR 701, which is known to express prochymosin gene in the E. coli host cells. These modified expression plasmids are designed to provide high expression levels of prochymosin.
摘要:
A DNA coding for a fusion protein comprising a polypeptide having the antigenicity of Mycoplasma gallisepticum and a polypeptide derived from Herpesvirus outer membrane protein, in which the polypeptide derived from the outer membrane protein has been ligated with the polypeptide having the antigenicity of Mycoplasma gallisepticum at the N terminus thereof, is prepared. The DNA is inserted into a region non-essential to growth of Avipox virus and the resulting recombinant Avipox virus is provided as a more potent recombinant virus as an anti-Mycoplasma vaccine.
摘要:
A recombinant fowlpox virus is disclosed which is useful as a vaccine for protection against Marek's Disease. The recombinant virus preferably contains a gene for one or more Marek's Disease Virus antigens such as glycoprotein B homologue, glycoprotein C homologue, glycoprotein D homologue, glycoprotein H homologue and tegument proteins, under the control of a poxvirus promoter within a region of the DNA of fowlpox virus which is not essential for virus growth.
摘要:
The present invention provides methods for producing an ethylene-vinyl acetate copolymer and a saponified product thereof, in which defective appearances at the time of molding (e.g. fish eye or coloring) can be inhibited while using a recovered solvent. In the present invention, a recovered alcohol-based solvent is supplied for reuse after decreasing the concentration of an aldehyde compound contained in the solvent. The concentration of an aldehyde compound can be decreased by acetalizing it with an acid such as a cation exchange resin. For example, the concentration of an aldehyde compound in the solvent is not more than 100 ppm, and the concentration of an acetal compound in the solvent is at least 0.1 ppm but not more than 10,000 ppm.
摘要:
Disclosed herein are a polymerized toner of core-shell structure, comprising core particles composed of colored polymer particles having a volume average particle diameter (dv) of 0.5-20 .mu.m and a ratio (dv/dp) of the volume average particle diameter (dv) to a number average particle diameter (dp) of at most 1.7, and shell which is formed of a polymer layer having an average film thickness of 0.001-0.1 .mu.m and covers each of the core particles, and a production process thereof.
摘要:
Antigen proteins of Mycoplasma gallisepticum, genes encoding the antigen protein, recombinant vectors integrated with the gene and hosts transformed with the vector are provided. Diagnostics and vaccine using the antigen protein produced by such hosts are effective for poultry, especially chicken infected with Mycoplasma gallisepticum. Vaccination can maintain poultry free of Mycoplasma gallisepticum infection.
摘要:
A method for processing a solution of ethylene-vinyl alcohol copolymer in a solvent other than water, which involves continuously substituting a part of the solvent in the solution with water to produce a high-concentration ethylene vinyl alcohol copolymer solution without gelling, whereby an ethylene-vinyl alcohol copolymer solution is fed into a column vessel selected from a plate column and a packed column, and a part of the solvent in the solution is substituted with water in the column vessel.
摘要:
A nucleotide sequence encoding the gp82 polypeptide of Marek's disease virus is disclosed. Also disclosed are recombinant viruses which are useful as vaccines for protecting against Marek's Disease, preferably containing two or more genes encoding Marek's Disease Virus antigens such as glycoprotein B and glycoprotein gp82, under the control of a poxvirus promoter within a region of the DNA of fowlpox virus which is not essential for virus growth. Also provided is a vaccine exhibiting a synergistic immunoprotective effect, comprising a recombinant fowlpox virus expressing Marek's Disease Virus gB protein in combination with turkey herpesvirus. A method of immunizing poultry, comprising administering any of the disclosed vaccines, is also provided.
摘要:
A polymerized toner of core-shell structure, comprising core particles composed of colored polymer particles which contain a compound having at least one >C═N+
摘要翻译:核 - 壳结构的聚合调色剂,包含由着色聚合物颗粒组成的核心颗粒,所述着色聚合物颗粒包含其分子中具有至少一个> C = N + <结构的化合物和着色剂,以及玻璃化转变温度较高的聚合物层 比构成核心颗粒的聚合物组分,所述聚合物层覆盖每个核心颗粒,其制备方法,包括使用聚合调色剂的图像形成方法和包含聚合调色剂的成像设备。
摘要:
A method for producing a saponified ethylene-vinyl acetate copolymer which comprises saponifying an ethylene-vinyl acetate copolymer in an alcohol-based solvent with an alkali catalyst, wherein an amount between 100 ppm and 15,000 ppm of water with respect to the ethylene-vinyl acetate copolymer is supplied into the alcohol-based solvent. According to this method, discoloration, etc. of a saponified ethylene-vinyl acetate copolymer is inhibited, and visual characteristics of the saponified copolymer are improved.