Abstract: Provided is a device sealed with a magnetic liquid. The device includes: a rotary shaft, a tank body, a control unit, a first module, a second module, a magnetic liquid, and a pole-tooth. The first module and the second module are in the same configuration, each consists of an outer shell, a left pole-shoe, an electromagnet, a control wiring, a right pole-shoe, and a circlip. The device includes at least two modular structures; the control unit controls a first electromagnet and a second electromagnet to be magnetized to alternately bear a sealing role.

Abstract: Provided is a device sealed with a magnetic liquid. The device includes: a rotary shaft, a first bearing, a tank body, a first magnetism isolation ring, a first gasket ring, a first pole-shoe, a permanent magnet, a second pole-shoe, a second gasket ring, a second magnetism isolation ring, a second bearing, an end cover, a pole-tooth and a water delivery coating. The water delivery coating strips are coated on the an exterior circumferential surface of the rotary shaft at intervals, where each water delivery coating strip contains three parts with different water delivering directions individually.

Abstract: The present invention provides an efficient apparatus for extracting biologically active substances through a magnetic particle method, comprising a magnetic needle, a magnetic needle moving mechanism, a sleeve and a sleeve moving mechanism and a vibration mechanism, a bracket, a positioning mechanism; the vibration mechanism is capable of generating vibrations to enable the sleeve moving mechanism to make upward and downward vibrations; wherein the magnetic needle can vertically insert into and move out of the sleeve; the sleeve can vertically insert into and move out of a sample treatment area; and the vibration mechanism comprises a lever bar, a movable fulcrum and a rotary mechanism. The present invention further provides an instrument comprising the apparatus for extracting biologically active substances. The present invention further provides a method for extracting and purifying biologically active substances using the apparatus or the instrument for extracting biologically active substances.

Abstract: The present invention provides a device for use in a magnetic bead method, comprising a magnetic needle sleeve, a magnetic needle and a container, wherein the magnetic needle sleeve has a sleeve body and a sleeve bottom, the outer surface of the sleeve bottom has one or more vertically arranged blades. The present invention also provides a magnetic needle sleeve as described above. The present invention also provide a method for treating magnetic particles in a liquid composition using a device or a magnetic needle sleeve as described above. The structure of the magnetic needle sleeve provided by the invention can increase the amount of magnetic particles absorbed by the sleeve and greatly reduce the lose of the magnetic particles clusters condensed at the bottom of the needle sleeve during the transfer process.

Abstract: The present invention provides an efficient apparatus for extracting biologically active substances through a magnetic particle method, comprising a magnetic needle, a magnetic needle moving mechanism, a sleeve and a sleeve moving mechanism and a vibration mechanism, a bracket, a positioning mechanism; the vibration mechanism is capable of generating vibrations to enable the sleeve moving mechanism to make upward and downward vibrations; wherein the magnetic needle can vertically insert into and move out of the sleeve; the sleeve can vertically insert into and move out of a sample treatment area; and the vibration mechanism comprises a lever bar, a movable fulcrum and a rotary mechanism. The present invention further provides an instrument comprising the apparatus for extracting biologically active substances. The present invention further provides a method for extracting and purifying biologically active substances using the apparatus or the instrument for extracting biologically active substances.