摘要:
The amino acid sequence of a mutant which is obtained by introducing a novel mutation into a Pseudonocardia thermophila JCM3095-derived nitrile hydratase consisting of two types of heterogeneous subunits, and the base sequence of the gene are provided. The nitrile hydratase is modified by specifying the region to be modified in the stereostructure/amino acid sequence of the nitrile hydratase, and applying alteration such as substitution, insertion, deletion or the like, to the amino acids in the amino acid sequence which are corresponding to the amino acid residues forming the region. Also provided is a method for modifying an enzyme having a nitrile hydratase activity.
摘要:
A molded article formed of a composition including 100 parts by weight of at least one kind of resin selected from the group consisting of thermoplastic resins and thermosetting resins, and 0.01 parts by weight to 10,000 parts by weight of a silylated polyolefin, which is obtained by a reaction between a silicon-containing compound containing a structural unit represented by Formula (1) and a vinyl group-containing compound having a defined number average molecular weight, a derivative thereof, or a mixture of these, —Si(R1)H—Y1— (1) wherein R1 and Y1 are defined and with the proviso that the silylated polyolefin is not obtained by a reaction between a silicon-containing compound containing a structural unit represented by Formula (1) and having two or more SH groups per molecule and a compound having 2.0 or more vinyl groups on average per molecule as the vinyl group-containing compound.
摘要翻译:由包含100重量份的选自热塑性树脂和热固性树脂的至少一种树脂和0.01重量份至10,000重量份的甲硅烷基化聚烯烃的组合物形成的模塑制品,其通过 包含式(1)表示的结构单元的含硅化合物和具有确定数均分子量的含乙烯基的化合物,其衍生物或它们的混合物之间的反应-Si(R1)H- Y 1 - (1)其中R1和Y1被定义,条件是甲硅烷基化聚烯烃不是通过含有由式(1)表示的结构单元的含硅化合物与每分子具有两个或更多个SH基团的反应而得到的 和每分子平均具有2.0个以上乙烯基的化合物作为含乙烯基的化合物。
摘要:
Provided are a resin composition comprising 100 parts by mass of the polymer having an alicyclic structure at least in a part of a repeating structural unit and 0.05 to 5 parts by mass of a hindered amine compound having a carbon atom at a ratio of from 67% by weight to 80% by weight in the molecular structure and having a molecular weight of from 500 to 3500, a novel piperidine derivative having a piperidylaminotriazine skeleton, a molded product such as an optical component obtained by molding the resin composition, and an optical pickup device which employs the optical component.
摘要:
The amino acid sequence of a mutant which is obtained by introducing a novel mutation into a Pseudonocardia thermophila JCM3095-derived nitrile hydratase consisting of two types of heterogeneous subunits, and the base sequence of the gene are provided. The nitrile hydratase is modified by specifying the region to be modified in the stereostructure/amino acid sequence of the nitrile hydratase, and applying alteration such as substitution, insertion, deletion or the like, to the amino acids in the amino acid sequence which are corresponding to the amino acid residues forming the region. Also provided is a method for modifying an enzyme having a nitrile hydratase activity.
摘要:
The invention provides a method for producing a cytosine nucleoside compound from pentose-1-phosphate and cytosine or a derivative thereof using a nucleoside phosphorylase reactive to cytosine or a bacterium having the enzyme activity. The invention also provides a method for specifically reducing an activity to degrade the substrates or the product, resulting in efficient production of the cytosine nucleoside compound. According to the invention, little by-product is produced in producing cytonucleocide compounds.
摘要:
Disclosed is a porous metal oxide obtained by subjecting metal alkoxide and/or a partially hydrolyzed condensate of the metal alkoxide to a sol-gel reaction in the presence of terminally branched copolymer particles represented by the following general formula (1) and having a number average molecular weight of not more than 2.5×104 to obtain an organic-inorganic composite and removing the terminally branched copolymer particles from the composite.
摘要:
Glycolic acid having a high purity is obtained by subjecting glycolic acid or a glycolic acid solution containing contaminants to double-chamber electrodialysis combined with one or more treatments selected from among treatment with an activated carbon, treatment with an ion exchange resin, concentration treatment and cooling crystallization.
摘要:
Provided are polymer particles composed of a terminally branched copolymer represented by the following general formula (1) and having a number average molecular weight of not more than 2.5×104, wherein, in the formula, A represents a polyolefin chain; R1 and R2 each represent a hydrogen atom or an alkyl group having 1 to 18 carbon atoms, and at least one of R1 and R2 is a hydrogen atom; and X1 and X2 may be the same or different, and each a linear or branched polyalkylene glycol group.
摘要翻译:提供由下列通式(1)表示的数均分子量不超过2.5×104的由末端支化共聚物组成的聚合物颗粒,其中,在该式中,A表示聚烯烃链; R 1和R 2各自表示氢原子或碳原子数1〜18的烷基,R 1和R 2中的至少一个为氢原子; X 1和X 2可以相同或不同,并且各自为直链或支链的聚亚烷基二醇基团。
摘要:
A molded article formed of a composition including 100 parts by weight of at least one kind of resin selected from the group consisting of thermoplastic resins and thermosetting resins, and 0.01 parts by weight to 10,000 parts by weight of a silylated polyolefin, which is obtained by a reaction between a silicon-containing compound containing a structural unit represented by Formula (1) and a vinyl group-containing compound having a defined number average molecular weight, a derivative thereof, or a mixture of these, —Si(R1)H—Y1— (1) wherein R1 and Y1 are defined and with the proviso that the silylated polyolefin is not obtained by a reaction between a silicon-containing compound containing a structural unit represented by Formula (1) and having two or more SH groups per molecule and a compound having 2.0 or more vinyl groups on average per molecule as the vinyl group-containing compound.
摘要:
Disclosed is a porous metal oxide obtained by subjecting metal alkoxide and/or a partially hydrolyzed condensate of the metal alkoxide to a sol-gel reaction in the presence of terminally branched copolymer particles represented by the following general formula (1) and having a number average molecular weight of not more than 2.5×104 to obtain an organic-inorganic composite and removing the terminally branched copolymer particles from the composite,