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    • 3. 发明申请
    • METHOD AND KIT FOR THE SAMPLE PRESERVATION AND CELL DISRUPTION BEFORE THE EXTRACTION OF NUCLEIC ACIDS
    • US20110098462A1
    • 2011-04-28
    • US12809468
    • 2008-12-22
    • Rudolf EhwaldDietmar LercheHolger WoehleckeChristina Lerche
    • Rudolf EhwaldDietmar LercheHolger WoehleckeChristina Lerche
    • C07H21/00C12N5/02C12M1/00
    • C12N1/063
    • The invention relates to a method for preserving samples and disrupting cells which can be employed for the preparation of the extraction of nucleic acids from live cells, cell aggregates and tissue samples, and to a kit for carrying out the method. The method includes the introduction of live cells, cell aggregates or tissue samples whose nucleic acids are to be extracted into an excess of water-miscible and volatile organic liquid. The saturation of the sample with the organic liquid has an advantageous effect on the extraction of the nucleic acids, which is subsequently carried out in an aqueous medium. The mechanical cell disruption is facilitated by the virtually complete removal of the water from the cells. The biomembranes are dissolved in the organic liquid. tRNA and other RNA fractions with a low degree of polymerization, which are capable of permeating across the cell wall, can be extracted selectively without mechanical disruption. Before high-molecular-weight nucleic acids are extracted, the cells, cell aggregates or tissue samples are disrupted in the organic liquid with the aid of mechanical pulses. Since the nucleases are inactive in the dehydrated organic liquid, the biological samples or the homogenates prepared therefrom can be stored at room temperature in the organic liquid as long as desired. After incubation in the largely anhydrous organic liquid, the sample's nucleases are largely denatured. An advantageous kit according to the invention contains a mixed organic/aqueous phase with denaturing properties and, for each sample, a shaped body for dehydration which is adapted to suit the size of the preservation container, and a mixture, adapted to suit the size of the preservation container, of a few large and many small disruption bodies for the disruption in the nonaqueous medium. A considerable advantage of the invention is the fact that cooling and powerful mechanical pulses when disrupting the cells and during the extraction may be dispensed with, and that DNA extraction and cell disruption can be carried out at different times.
    • 6. 发明授权
    • Method and device for characterisation of multiple samples of one or various dispersions
    • 用于表征一种或多种分散体的多个样品的方法和装置
    • US08265882B2
    • 2012-09-11
    • US10591701
    • 2005-03-04
    • Dietmar LercheTitus SobischTorsten DetloffFrank BabickMichael Stintz
    • Dietmar LercheTitus SobischTorsten DetloffFrank BabickMichael Stintz
    • G01N33/00
    • G01N15/0205G01N15/042
    • A method and a device for the automatic determination of selected physical and colloidal chemistry parameters by determining the attenuation of radiated waves through monodisperse or polydisperse dispersion samples subjected to gravitation or centrifugation, wherein during the segregation by means of centrifugation or gravitation, the instantaneous transmission IT(t, r) characterizing the current segregation status of the waves radiated with the intensity Io(t, r) and/or the instantaneous scattering IS(t, r) as a function of the position within the samples is repeatedly determined and recorded at high resolution at any arbitrary time for one or more wavelengths over the entire length of the sample or in selected partial sections of it, simultaneously for multiple and even concentrated samples with known and/or unknown physical and colloidal chemistry properties.
    • 通过确定经受重力或离心的单分散或多分散分散样品的辐射波的衰减来自动确定所选物理和胶体化学参数的方法和装置,其中在通过离心或重力分离期间瞬时传输IT (t,r)表征作为样本内的位置的函数的以强度Io(t,r)和/或瞬时散射IS(t,r)辐射的波的当前偏析状态,被重复地确定并记录在 在任何时间对于在样品的整个长度上或在其选定的部分切片中的一个或多个波长的高分辨率,同时具有已知和/或未知的物理和胶体化学性质的多个甚至浓缩的样品。