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    • 76. 发明授权
    • Processes for producing P1,P4-diuridine-5′-tetraphosphate
    • 生产P1,P4-尿嘧啶-5'-四磷酸的方法
    • US06780988B2
    • 2004-08-24
    • US10120367
    • 2002-04-12
    • Hideaki MaedaToshio YamadaHiroshi SatoYutaka Noda
    • Hideaki MaedaToshio YamadaHiroshi SatoYutaka Noda
    • C07H2102
    • C07H19/10C07H21/02
    • The invention describes a process for producing P1,P4-di(uridine-5′-)tetraphosphate (U2P4) or a salt thereof from uridine 5′-monophosphate (UMP); wherein the process comprises at least one of the steps (a) and (b): (a) adding UMP diphenylphosphate (UMP-DPP) in divided portions during a step of reacting UMP-DPP with an organic alkali salt of pyrophosphate (PP1) to produce a reaction mixture; wherein at least one equivalent of a first base is present during one portion of the reaction; (b) reacting UMP-DPP with a PPi-organic alkali salt in the presence of at least one equivalent of a second base to produce a reaction mixture, wherein the first base and the second base may be the same or different; (c) subsequently adding water to the reaction mixture to produce an aqueous reaction mixture; and optionally (d) adding an alkali to the aqueous reaction mixture.
    • 本发明描述了从尿苷5'-单磷酸(UMP)生产P 1,P 4 - 二(尿苷-5' - )四磷酸(U2P4)或其盐的方法; 其中所述方法包括步骤(a)和(b)中的至少一个步骤:(a)在使UMP-DPP与焦磷酸酯(PP1)的有机碱金属盐反应的步骤期间,分开加入UMP二苯基磷酸酯(UMP-DPP) 以产生反应混合物; 其中在反应的一部分期间存在至少一当量的第一碱基; (b)在至少一当量的第二碱的存在下使UMP-DPP与PPi-有机碱金属盐反应以产生反应混合物,其中第一碱和第二碱可以相同或不同; (c)随后向反应混合物中加入水以产生水性反应混合物; 和(d)向反应混合物中加入碱。
    • 77. 发明授权
    • Information recording and reproducing apparatus
    • 信息记录和再现装置
    • US06731441B2
    • 2004-05-04
    • US10214599
    • 2002-08-09
    • Hideaki MaedaMorishi IzumitaTerumi TakashiSeiichi Mita
    • Hideaki MaedaMorishi IzumitaTerumi TakashiSeiichi Mita
    • G11B2006
    • G11B20/1403G11B20/10009
    • Here is disclosed an information recording and reproducing apparatus comprising a multi-phase quadrature angular modulator for subjecting a signal to be written on a recording medium to multi-phase quadrature angular modulation to generate a modulated signal expressing information in phase difference and frequency difference, a quantizer for generating a discrete signal by making discrete the amplitude of the modulated signal generated by the quadrature angular modulator with reference to a certain level, a write head for writing the output signal of the quantizer onto the recording medium, a read head for reading information written on the recording medium, a read compensate circuit for compensating the phase and amplitude of a signal readout of the read head, and a multi-phase quadrature angular demodulator for demodulating a signal supplied from the read compensate circuit by subjecting it to multi-phase quadrature angular demodulation. By expressing information to be recorded in phase difference or frequency difference, it is made possible to record or reproduce the information at the varying timing of amplitude, and the bit inversion interval can be controlled by regulating the timing of amplitude variation.
    • 这里公开了一种信息记录和再现装置,包括一个多相正交角度调制器,用于使信号被写入记录介质以进行多相正交角度调制以产生表示相位差和频差的信息的调制信号, 量化器,用于通过使由正交角调制器产生的调制信号的幅度相对于一定电平离散来产生离散信号,用于将量化器的输出信号写入记录介质的写入头,用于读取信息的读取头 写在记录介质上的读取补偿电路,用于补偿读取头的信号读出的相位和幅度的读取补偿电路;以及多相正交角解调器,用于对从读取的补偿电路提供的信号进行多相 正交角解调。 通过表示要以相位差或频率差记录的信息,可以在变化的幅度定时记录或再现信息,并且可以通过调节幅度变化的定时来控制位反转间隔。
    • 78. 发明授权
    • Superconducting coil apparatus with a quenching prevention means
    • 具有防淬火装置的超导线圈装置
    • US5404122A
    • 1995-04-04
    • US489100
    • 1990-03-06
    • Hideaki MaedaMasami UrataKatsumi KurosawaShoji Matsuda
    • Hideaki MaedaMasami UrataKatsumi KurosawaShoji Matsuda
    • H01F6/02H01F7/22
    • H01F6/02Y10S505/879
    • A superconducting apparatus is provided with windings having superconducting wires wound in a plurality of turns, and a cryostat housing the windings so as to cool the windings in a superconducting state. The superconducting wires disposed at the outer and inner peripheral areas of the windings are selected to be highly stabilized superconducting wires such that, even if frictional heat is conducted towards the windings, the highly stabilized superconducting wires are very less quenched and in turn the possibility of the quenching of the overall windings is extremely low. Further, good heat conductors are provided on the radially outer and inner of the windings. Frictional heat which flows towards the windings is transmitted into the good heat conductors in the circumferential direction, and is dissipated midway during the heat conduction. As a result, the introduction of the frictional heat into the windings is avoided and in consequence no quenching occurs in the superconducting wires. This enables the overall windings to be prevented from being quenched.
    • 超导装置具有缠绕多圈的超导线圈的绕组,以及容纳绕组的低温恒温器,以便在超导状态下冷却绕组。 设置在绕组的外周和外周区域的超导线被选择为高度稳定的超导线,使得即使向绕组传导摩擦热,高度稳定的超导线也被非常少的淬火,并且反过来也可能 整个绕组的淬火极低。 此外,在绕组的径向外部和内部设置良好的导热体。 向绕组流动的摩擦热在圆周方向传递到良好的导热体中,并在热传导期间中途消散。 结果,避免了将摩擦热引入到绕组中,并且因此在超导线中不会发生淬火。 这使得能够防止整个绕组被淬火。