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    • 105. 发明申请
    • RECOMBINANT BACTERIAL SYSTEM WITH ENVIRONMENTALLY LIMITED VIABILITY
    • 具有环境有限性的重组细菌系统
    • WO1996040947A1
    • 1996-12-19
    • PCT/US1996009774
    • 1996-06-07
    • WASHINGTON UNIVERSITY
    • WASHINGTON UNIVERSITYCURTISS, Roy, IIITINGE, Steven, A.
    • C12N15/64
    • C12N15/64C12N15/70C12N15/74
    • Disclosed in an Environmentally Limited Viability System (ELVS) for microorganisms based on differences between permissive and non-permissive environments. Viability of the microorganisms are limited to a permissive environment by specifically expressing one or more essential genes only in the permissive environment, and/or expressing one or more lethal genes only in the non-permissive environment. Temporary viability in a non-permissive environment can be achieved by temporarily expressing one or more essential genes in a non-permissive environment, and/or temporarily delaying expression of one or more lethal genes in the non-permissive environment. Environmentally Limited Viabilty Systems are also disclosed involving coordinate expression of a combination of required genes and lethal genes. Microorganisms containing an Environmentally Limited Viability System are useful for release into permissive and non-permissive environments. Temperature regulated Environmentally Limited Viability Systems are particularly suited for delivery of expression products, such as antigens, using recombinant avirulent Salmonella by limiting their growth to the warmer environment inside the host, or by allowing growth for only a limited time in the host.
    • 基于许可和非允许环境之间的差异,在针对微生物的环境有限的生存力系统(ELVS)中披露。 通过仅在许可环境中特异性表达一个或多个必需基因,和/或仅在非允许环境中表达一个或多个致死基因,将微生物的活力限制在许可环境中。 通过在非允许环境中临时表达一种或多种必需基因,和/或在非允许环境中暂时延缓一种或多种致死基因的表达,可以实现非允许环境中的临时活力。 还公开了环境有限的维持性系统,涉及协调所需基因和致死基因组合的表达。 含有环境有限的生存能力系统的微生物对于释放到容许和不允许的环境中是有用的。 温度调节环境有限的生存能力系统特别适用于通过将其生长限制在主机内较暖的环境中,或通过在宿主中仅允许有限的时间生长,使用重组无毒力沙门氏菌来递送表达产物,如抗原。
    • 108. 发明申请
    • METHOD AND APPARATUS FOR A VERNIER MAGNETIC RECORDING HEAD
    • VERNIER磁记录头的方法和装置
    • WO1996033488A1
    • 1996-10-24
    • PCT/US1996004914
    • 1996-04-09
    • WASHINGTON UNIVERSITY
    • WASHINGTON UNIVERSITYINDECK, Ronald, S.
    • G11B05/584
    • G11B5/488G11B5/09G11B5/5534G11B5/58G11B5/59633
    • A vernier magnetic recording head (30) comprises multiple read and write transducers. The write transducers (32, 34, 36, 38 and 40) are equally spaced a first distance apart and the read transducers (42, 44, 46, 48, 50 and 51) are equally spaced a second distance apart. The write transducers initially write a plurality of equally spaced servo tracks (52, 54, 56, 58 and 60) which can be subsequently tracked by the read transducers. The write transducers may then be used to successively write a plurality of data tracks (62, 64, 66, 68 and 70) to one side of each servo track. The read transducers are positioned relative to the write transducers such that one read transducer is always positioned to track a servo track while the write transducers are writing the data tracks, thereby positioning the data tracks equidistant and parallel to or concentric with the servo tracks. One read transducer is positioned to track a servo track as the head is positioned at an extreme so that read transducers read data from the furthest data tracks, and the head may be positioned to write an adjacent set of new servo tracks.
    • 游标磁记录头(30)包括多个读和写传感器。 写换能器(32,34,36,38和40)间隔开第一距离,并且读换能器(42,44,46,48,50和51)间隔开第二距离。 写入换能器最初写入多个等间距的伺服轨道(52,54,56,58和60),随后可以由读取的换能器跟踪。 然后可以使用写换能器来连续地将多个数据轨道(62,64,66,68和70)写入每个伺服轨道的一侧。 读取换能器相对于写入换能器定位,使得一个读取换能器总是被定位成跟踪伺服轨迹,同时写入换能器正在写入数据轨道,从而将数据轨迹等距并平行于或与伺服轨道同心。 一个读取传感器定位成当头部位于极端时跟踪伺服轨迹,以便读取传感器从最远的数据轨道读取数据,并且头部可被定位成写入相邻的一组新的伺服轨迹。