LOW COST, PORTABLE SENSOR FOR MOLECULAR ASSAYS
    56.
    发明申请
    LOW COST, PORTABLE SENSOR FOR MOLECULAR ASSAYS 有权
    低成本,便携式传感器用于分子测定

    公开(公告)号:US20120149129A1

    公开(公告)日:2012-06-14

    申请号:US13299087

    申请日:2011-11-17

    IPC分类号: G01N33/53 G01N27/00 G01N27/72

    摘要: An integrated sensor that is capable of discriminating the distance of a label from the sensor without using an optical signal. The label is attached to a single probe molecule or a group of probe molecules that interacts with a single or group of target molecules. As a consequence of this interaction, the probe molecule and/or the target molecule undergo a conformal change. This conformal change leads to perturbations in the distance of the label from the sensor. Thus, measurements and properties such as the concentration and the identity of one or more target molecules can be discerned from signals generated by the sensor (or by a plurality of sensors in a sensor array) and subjected to analysis using general purpose programmable computers programmed with suitable software that controls the analytical process, and such measurements and properties can be provided as a result of the analysis.

    摘要翻译: 能够在不使用光信号的情况下识别标签与传感器的距离的集成传感器。 标签连接到与单个或一组靶分子相互作用的单个探针分子或一组探针分子。 作为这种相互作用的结果,探针分子和/或靶分子经历保形变化。 这种共形变化导致标签与传感器距离的扰动。 因此,可以从由传感器(或传感器阵列中的多个传感器)产生的信号中识别出一个或多个目标分子的浓度和特性的测量和性质,并使用通过编程的通用可编程计算机进行分析 作为分析过程的结果,可以提供控制分析过程的合适的软件,并且可以提供这样的测量和性质。

    Device for measuring AC magnetization of materials
    57.
    发明授权
    Device for measuring AC magnetization of materials 有权
    用于测量材料的交流磁化的装置

    公开(公告)号:US08193804B2

    公开(公告)日:2012-06-05

    申请号:US12394043

    申请日:2009-02-27

    IPC分类号: G01N27/74 G01N15/06 G01R33/12

    摘要: Disclosed is an apparatus for measuring ac magnetization at mixture frequency. The apparatus includes an ac generating unit for generating at least a first current with a frequency f1 and a second current with a frequency f2. The apparatus further includes a co-axial solenoid unit, driven by the first and second ac currents, to generate a first magnetic field and a second magnetic field. A pick-up solenoid is for disposing sample for detecting an ac magnetization of the sample and multiple frequency-component signals corresponding to various frequency combinations of f1 and f2 are output. The apparatus further includes a signal processing circuit for receiving the frequency-component signals, where the signal processing circuit obtains the ac magnetization of the sample at a target frequency of (γTf1+βTf2), which γT and βT are positive integers and the frequency f1 and the frequency f2 are two different frequencies.

    摘要翻译: 公开了一种在混合频率下测量交流磁化强度的装置。 该装置包括交流发生单元,用于产生具有频率f1的至少第一电流和具有频率f2的第二电流。 该装置还包括由第一和第二交流电流驱动的同轴螺线管单元,以产生第一磁场和第二磁场。 拾取螺线管用于设置用于检测样品的交流磁化的样品,并输出与f1和f2的各种频率组合相对应的多个频率分量信号。 该装置还包括用于接收频率分量信号的信号处理电路,其中信号处理电路以(γTf1+&bgr; Tf2)的目标频率获得样本的交流磁化,其中γT和& Bgr; T为正整数 频率f1和频率f2是两个不同的频率。

    SENSOR WITH HIGH FREQUENCY AC MAGNETIC FIELD
    58.
    发明申请
    SENSOR WITH HIGH FREQUENCY AC MAGNETIC FIELD 审中-公开
    具有高频交流磁场的传感器

    公开(公告)号:US20120119727A1

    公开(公告)日:2012-05-17

    申请号:US12678502

    申请日:2008-09-16

    IPC分类号: G01N27/74 G01R33/12

    摘要: A sensor device for detecting one or more magnetic particles (102) in a sample fluid is described. The sensor device (100) uses at least one rotating magnetic field generator (108) for applying a rotating magnetic field to the sample and more particularly the one or more magnetic particles (102) incorporated therein. The sensor device also comprises a controller for controlling the magnetic field generator such that the rotating frequency of the applied magnetic field is substantially larger than the critical slipping frequency for the magnetic particle. The effect of the induced rotation is sensed using a sensor element (112). Presence, amount and binding properties of the magnetic particles (102) may be derived from the measured effect. Alternatively or additionally the viscosity of the sample fluid may be determined.

    摘要翻译: 描述了用于检测样品流体中的一个或多个磁性颗粒(102)的传感器装置。 传感器装置(100)使用至少一个旋转磁场发生器(108),用于向样品施加旋转磁场,更具体地,其中结合有一个或多个磁性颗粒(102)。 传感器装置还包括用于控制磁场发生器的控制器,使得施加的磁场的旋转频率基本上大于磁性颗粒的临界滑移频率。 使用传感器元件(112)感测感应旋转的影响。 磁性颗粒(102)的存在,量和结合性质可以从测量的效果导出。 或者或另外,可以确定样品流体的粘度。

    SENSOR DEVICE FOR MAGNETIC PARTICLES WITH A HIGH DYNAMIC RANGE
    60.
    发明申请
    SENSOR DEVICE FOR MAGNETIC PARTICLES WITH A HIGH DYNAMIC RANGE 审中-公开
    具有高动态范围的磁性颗粒传感器

    公开(公告)号:US20120062219A1

    公开(公告)日:2012-03-15

    申请号:US13321186

    申请日:2010-05-12

    申请人: Cristian B. Craus

    发明人: Cristian B. Craus

    IPC分类号: G01R33/12

    摘要: The invention relates to a method and a sensor device (100) for the detection of magnetic particles (M) in a sample. The magnetic particles (M) can bind to binding sites (Z) at a binding surface (12), where they can be detected by a detection unit (13, 14). A controller (15) is provided for controlling magnetic attraction (B) of the magnetic particles (M) towards the binding surface (12) in dependence on the detection signal (S) of the detection unit (14) in such a way that rotational relaxation conditions for the magnetic particles (M) are changed. In particular, this change can be controlled to maximize the binding of magnetic particles (M) to the binding surface (12) within a given measurement time. The change can for example be achieved by repeatedly switching the magnetic attraction off for prolonged periods, giving the magnetic particles (M) better chances to orient properly with respect to the binding surface (12).

    摘要翻译: 本发明涉及一种用于检测样品中的磁性颗粒(M)的方法和传感器装置(100)。 磁性颗粒(M)可以在结合表面(12)处结合结合位点(Z),在那里它们可以被检测单元(13,14)检测。 根据检测单元(14)的检测信号(S),控制器(15)被设置用于根据检测单元(14)的检测信号(S)控制磁性颗粒(M)的磁吸引(B)朝向装订表面(12) 改变磁性颗粒(M)的松弛条件。 特别地,可以控制这种变化以在给定的测量时间内使磁性颗粒(M)与结合表面(12)的结合最大化。 这种改变可以例如通过反复切换磁吸引物长时间来实现,使得磁性颗粒(M)更好地相对于粘合表面(12)适当地定向。