A method for characterising particles
    3.
    发明公开
    A method for characterising particles 失效
    Verfahren zur Charakterisierung von Teilchen。

    公开(公告)号:EP0391674A2

    公开(公告)日:1990-10-10

    申请号:EP90303579.8

    申请日:1990-04-03

    IPC分类号: G01N27/447

    摘要: A method for observing and determining the size of individual particles and for determining the weight distribution of a sample containing particles of varying size, which involves placing a deformable or nondefor- mable particle in a medium, subjecting the particle to an external force, thereby causing conformational and/or positional changes, and then measuring these changes. Preferred ways to measure conformational and positional changes include: (1) determining the rate at which a deformable particle returns to a relaxed state after termination of the external force, (2) determining the rate at which a particle becomes oriented in a new direction when the direction of the perturbing force is changed, (3) determining the rate at which a particle rotates, (4) measuring the length of a particle, particularly when it is at least partially stretched, or (5) measuring at least one diameter of a spherical or ellipsoidal particle. Measurements of relaxation, reorientation, and rotation rates, as well as length and diameter can be made using a light microscope connected to an image processor. Particle relaxation, reorientation and rotation also can be determined using a microscope combined with a spectroscopic device. The invention is' particularly useful for measuring polymer molecules, such as nucleic acids, and can be used to determine the size and map location of restriction digests. Breakage of large polymer molecules mounted on a microscope slide is prevented by condensing the molecules before mounting and unfolding the molecules after they have been placed in a matrix.

    摘要翻译: 一种用于观察和确定单个颗粒的尺寸并确定含有不同大小的颗粒的样品的重量分布的方法,其包括将可变形或不可变形的颗粒放置在介质中,使颗粒受到外力,由此引起构象和 /或位置变化,然后测量这些变化。 测量构象和位置变化的优选方法包括:(1)确定可变形颗粒在外力终止后返回到松弛状态的速率,(2)确定颗粒在新方向上定向的速率,当 扰动力的方向改变,(3)确定颗粒旋转的速度,(4)测量颗粒的长度,特别是当其至少部分拉伸时,或(5)测量至少一个直径的 球形或椭圆形颗粒。 可以使用连接到图像处理器的光学显微镜来进行放松,重新定向和旋转速率以及长度和直径的测量。 也可以使用与分光装置结合的显微镜来确定粒子松弛,重新取向和旋转。 本发明对于测量聚合物分子(例如核酸)特别有用,并且可用于确定限制性消化物的大小和图谱位置。 通过在将分子置于基质中之前将分子凝结并解离之前将分子凝聚来防止在显微镜载片上安装的大分子的破裂。

    BLOOD FLUIDITY MEASUREMENT APPARATUS AND BLOOD FLUIDITY MEASUREMENT METHOD
    4.
    发明公开
    BLOOD FLUIDITY MEASUREMENT APPARATUS AND BLOOD FLUIDITY MEASUREMENT METHOD 审中-公开
    GERÄTUND VERFAHREN ZUR MESSUNG DERBLUTFLIESSFÄHIGKEIT

    公开(公告)号:EP2216639A4

    公开(公告)日:2014-01-15

    申请号:EP08853229

    申请日:2008-10-28

    IPC分类号: G01N11/04 G01N33/49

    摘要: Deformability of blood cells is quantified in a short time. A blood fluidity measurement apparatus is provided with a TV camera (6) which photographs a stream of blood in either two areas of the internal area (A), entrance area (B), and exit area (C) of a gate (30), an image processing part (7) which calculates the velocity of the blood cells contained in the blood from the image taken by the TV camera (6), and a deformability calculation means (81) which calculates the deformability of the blood cells a blood fluidity from the velocity.

    摘要翻译: 在短时间内量化血细胞的变形性。 血液流动性测量装置设置有电视摄像机(6),其在门(30)的内​​部区域(A),入口区域(B)和出口区域(C)的两个区域中拍摄血液流, ,计算由TV摄像机(6)拍摄的图像中包含在血液中的血细胞的速度的图像处理部(7),以及计算血细胞变形性的变形能力计算单元(81) 流速从速度。