PREPARATION OF DISPERSIONS OF PARTICLES FOR USE AS CONTRAST AGENTS IN ULTRASOUND IMAGING
    64.
    发明申请
    PREPARATION OF DISPERSIONS OF PARTICLES FOR USE AS CONTRAST AGENTS IN ULTRASOUND IMAGING 审中-公开
    在超声成像中作为对比剂使用颗粒分散液的制备

    公开(公告)号:US20090123385A1

    公开(公告)日:2009-05-14

    申请号:US11577821

    申请日:2005-10-29

    IPC分类号: A61B8/06 B01F13/00

    摘要: A method of making a suspension of particles in a first fluid of a size suitable for responding to ultrasound, by forcing a second fluid (2) through an array of pores (30) into the first fluid (1), the pores being of substantially uniform diameter, and the pressure of the second fluid and a flow rate of the first fluid across the pores being arranged so that shear forces at the pores cause the second fluid to be suspended as substantially monodisperse particles in the first fluid. This can enable a more monodisperse suspension. The array of pores can be an etched silicon array. The suspension can be used as a contrast agent, or can be an emulsion to make droplets of a precursor material, which can be formed into capsules with a core and a shell. A liquid core can be converted to a gas to provide hollow shells.

    摘要翻译: 一种通过迫使第二流体(2)穿过孔(30)阵列进入第一流体(1),使颗粒悬浮在适于响应于超声波的尺寸的第一流体中的悬浮液的方法,所述孔基本上 均匀的直径,并且第二流体的压力和穿过孔的第一流体的流量被布置成使得孔处的剪切力使得第二流体作为基本上单分散的颗粒悬浮在第一流体中。 这可以使更多的单分散悬浮液。 孔阵列可以是蚀刻硅阵列。 悬浮液可以用作造影剂,或者可以是乳液,以制备可以形成具有核和壳的胶囊的前体材料的液滴。 液芯可以转化为气体以提供中空的外壳。

    Optical switching device
    66.
    发明授权
    Optical switching device 失效
    光开关器件

    公开(公告)号:US06101298A

    公开(公告)日:2000-08-08

    申请号:US37892

    申请日:1998-03-10

    摘要: A description is given of an optical switching device (1) comprising a transparent substrate (3), a switching film (5) of a hydride compound of a trivalent transition or rare earth metal having a thickness of 300 nm, and a palladium capping layer (7) having a thickness of 30 nm. The capping layer is in contact with hydrogen. An electric current through the switching film (5) can be switched on and off between the terminals (9, 11). Joule heating of the switching film (5) causes a rapid transition from the transparent trihydride state to the absorbing dihydride state. By switching off the current, the switching film (5) cools down, which results in the formation of the absorbing dihydride state. The conversion between both states is reversible and can be repeated many times. The device can be used for controlling light beams, or it can be used in or for a display. Optionally, cooling of the switching film (5) is obtained with a Peltier element in thermal contact with the switching film (5).

    摘要翻译: 说明了包括透明基板(3),厚度为300nm的三价过渡金属或稀土金属的氢化物化合物的开关膜(5)和钯封盖层(1)的光开关装置(1) (7),厚度为30nm。 封盖层与氢接触。 可以在端子(9,11)之间接通和断开通过开关薄膜(5)的电流。 开关膜(5)的焦耳加热导致从透明三氢化物状态到吸收二氢化态的快速转变。 通过切断电流,开关膜(5)冷却,这导致形成吸收二氢化物状态。 两种状态之间的转换是可逆的,可重复多次。 该装置可用于控制光束,或者可以用于显示器或用于显示器。 可选地,通过与开关膜(5)热接触的珀耳贴元件来获得开关薄膜(5)的冷却。