Method of writing, reading and erasing information
    4.
    发明授权
    Method of writing, reading and erasing information 失效
    写入,读取和擦除信息的方法

    公开(公告)号:US5432032A

    公开(公告)日:1995-07-11

    申请号:US82896

    申请日:1993-08-23

    摘要: A method of writing and reading or writing, reading and erasing information in an optical recording medium is provided in which in an optical recording medium an optically active compound which is an inherently chiral dissymmetric olefinic chromophore is subjected to the action of circularly polarized light or is caused to undergo cis-trans isomerization during writing, is subjected to linearly polarized light during reading, and is subjected to linearly or circularly polarized light or light of a wavelength suitable to effect cis-trans isomerization for erasing.

    摘要翻译: 提供了一种在光学记录介质中书写和读取和擦除信息的方法,其中在光学记录介质中,固有的手性不对称烯属发色团的光学活性化合物受到圆偏振光的作用,或者是 在书写过程中发生顺式 - 反式异构化,在读取期间经历线性偏振光,并且经受线性或圆偏振光或适于实现顺式 - 反式异构化的波长的光以进行擦除。

    Dendrimer and an active substance occluded in the dendrimer, a process
for the preparation thereof and a process for releasing the active
substance
    8.
    发明授权
    Dendrimer and an active substance occluded in the dendrimer, a process for the preparation thereof and a process for releasing the active substance 失效
    树枝状聚合物中的树枝状聚合物和被遮挡的活性物质,其制备方法和释放活性物质的方法

    公开(公告)号:US5788989A

    公开(公告)日:1998-08-04

    申请号:US454026

    申请日:1995-05-30

    摘要: The invention relates to a dendrimer composition in which an effective number of the terminal functionalities are provided with blocking agents, and at least one active substance species is occluded in the dendrimer. A blocking agent is a sufficiently sterically sized compound which readily enters into a chemical bond with a terminal group of a dendrimer but which can also be split off from the dendrimer or can be modified without affecting the chemical structure of the dendrimer and the occluded active substance. The blocking agent can also be provided with a protecting group. The time and duration over which an active substance is released can be controlled. The invention also relates to a process for the preparation of such a composition and to a process for the controlled release of the active substance.

    摘要翻译: 本发明涉及一种树枝状大分子组合物,其中有效数目的末端官能团具有封闭剂,并且至少一种活性物质被遮盖在树状聚合物中。 封闭剂是足够空间尺寸的化合物,其容易与树枝状聚合物的末端基团进行化学键合,但也可以从树枝状聚合物分离,或者可以在不影响树枝状聚合物和封闭的活性物质的化学结构的情况下进行改性 。 封端剂也可以具有保护基。 可以控制释放活性物质的时间和持续时间。 本发明还涉及一种制备这种组合物的方法和用于控制释放活性物质的方法。