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    • 5. 发明申请
    • Process for producing lactonase and utilization thereof
    • 生产内酯酶的方法及其利用
    • US20070134775A1
    • 2007-06-14
    • US10547424
    • 2004-03-03
    • Sakayu ShimizuMichihiko KataokaKeiji Sakamoto
    • Sakayu ShimizuMichihiko KataokaKeiji Sakamoto
    • C12P17/06C12N9/16C12N1/18
    • C12P41/003C12N9/18C12P17/04
    • It has been required to economically produce a large amount of optically active γ-lactone derivatives (for example, pantolactone), which are useful as intermediates in synthesizing useful substances such as pharmaceutical drugs. To achieve this object, it is advantageous to employ an enzymatic technique of asymmetric hydrolysis with a hydrolyzing enzyme lactonase. However, it remains troublesome to prepare the enzyme or utilize a microorganism capable of producing the enzyme. Also, it is difficult to obtain a sufficient and stable enzymatic activity in the case of using recombination techniques. In producing lactonase, which asymmetrically hydrolyzes a γ-lactone derivative such as racemic pantolactone selectively, by a recombination technique, both mature lactonase DNA and signal peptide region DNA are transferred into a host. Thus, a stable lactonase activity comparable to naturally-occurring one can be achieved and a transformant sustaining a high enzyme activity in a stable manner can be acquired, thereby allowing the efficient and industrially advantageous asymmetric synthesis of γ-lactone derivatives.
    • 需要经济地生产大量的用作合成有用物质如药物的中间体的光学活性γ-内酯衍生物(例如泛酸内酯)。 为了达到这个目的,使用水解酶内酯酶的不对称水解酶技术是有利的。 然而,制备酶或利用能够产生酶的微生物仍然是麻烦的。 此外,在使用重组技术的情况下,难以获得足够稳定的酶活性。 在制备内含子选择性地水解γ-内酯衍生物如外消旋泛酸内酯的内切酶中,通过重组技术,将成熟内含酶DNA和信号肽区DNA两者转移到宿主中。 因此,可以获得与天然存在的活性相当的稳定的内含酶活性,并且可以获得以稳定的方式维持高酶活性的转化体,从而允许有效和工业上有利的γ-内酯衍生物的不对称合成。
    • 8. 发明申请
    • Process for producing lactonase and utilitzation thereof
    • 生产内酯酶的方法及其功效
    • US20090137012A1
    • 2009-05-28
    • US12232870
    • 2008-09-25
    • Sakayu ShimizuMichihiko KataokaKeiji Sakamoto
    • Sakayu ShimizuMichihiko KataokaKeiji Sakamoto
    • C12P17/04
    • C12P41/003C12N9/18C12P17/04
    • It has been required to economically produce a large amount of optically active γ-lactone derivatives (for example, pantolactone), which are useful as intermediates in synthesizing useful substances such as pharmaceutical drugs. To achieve this object, it is advantageous to employ an enzymatic technique of asymmetric hydrolysis with a hydrolyzing enzyme lactonase. However, it remains troublesome to prepare the enzyme or utilize a microorganism capable of producing the enzyme. Also, it is difficult to obtain a sufficient and stable enzymatic activity in the case of using recombination techniques. In producing lactonase, which asymmetrically hydrolyzes a γ-lactone derivative such as racemic pantolactone selectively, by a recombination technique, both mature lactonase DNA and signal peptide region DNA are transferred into a host. Thus, a stable lactonase activity comparable to naturally-occurring one can be achieved and a transformant sustaining a high enzyme activity in a stable manner can be acquired, thereby allowing the efficient and industrially advantageous asymmetric synthesis of γ-lactone derivatives.
    • 需要经济地生产大量的用作合成有用物质如药物的中间体的光学活性γ-内酯衍生物(例如泛酸内酯)。 为了达到这个目的,使用水解酶内酯酶的不对称水解酶技术是有利的。 然而,制备酶或利用能够产生酶的微生物仍然是麻烦的。 此外,在使用重组技术的情况下,难以获得足够稳定的酶活性。 在制备内含子选择性地水解γ-内酯衍生物如外消旋泛酸内酯的内切酶中,通过重组技术,将成熟内含酶DNA和信号肽区DNA两者转移到宿主中。 因此,可以获得与天然存在的活性相当的稳定的内含酶活性,并且可以获得以稳定的方式维持高酶活性的转化体,从而允许有效和工业上有利的γ-内酯衍生物的不对称合成。
    • 9. 发明授权
    • Transmission belt
    • 传动皮带
    • US09140329B2
    • 2015-09-22
    • US14359565
    • 2012-02-01
    • Mitsuhiro YamadaKeiji SakamotoShinji Uchigashima
    • Mitsuhiro YamadaKeiji SakamotoShinji Uchigashima
    • C08F8/00C08F283/00C08F12/28F16G1/10F16G1/12F16G1/28
    • F16G1/10F16G1/12F16G1/28
    • The durability of a belt is enhanced by improving the strength of rubber itself while enhancing its peeling strength with respect to a cord, a fabric or a short fiber. A toothed belt (10) comprises a belt body (13) that is integrally formed by a tooth rubber (11) provided on one surface side thereof, a backing rubber (12) provided on the other surface side, and an embedded cord (14) spirally wound in a boundary portion between the tooth rubber (11) and the backing rubber (12) that extends in the longitudinal direction of the belt. A facing fabric (20) covering the tooth rubber (11) is adhered to a surface of the tooth rubber (11), or one surface of the belt body (13). The tooth rubber (11) is obtained by vulcanization-molding a rubber composition including rubber such as HNBR, resorcinol, a melamine compound, silica and the like.
    • 通过提高橡胶本身的强度并提高其对帘线,织物或短纤维的剥离强度,可以提高带的耐久性。 齿形带(10)包括带状体(13),其由设置在其一个表面侧上的齿状橡胶(11),设置在另一个表面侧的背衬橡胶(12)和嵌入的帘线 )螺旋缠绕在沿着带的纵向方向延伸的齿橡胶(11)和背衬橡胶(12)之间的边界部分中。 覆盖齿橡胶(11)的面料(20)粘附到齿橡胶(11)的表面或带体(13)的一个表面。 通过硫化成型包含橡胶如HNBR,间苯二酚,三聚氰胺化合物,二氧化硅等的橡胶组合物来获得齿橡胶(11)。