A magnetic rod guide for a filter is provided that includes a base for attachment to part of a filter, a through aperture through which a magnetic rod can move, and resilient engagement means. The resilient engagement means includes one or more resilient latches for holding the magnetic rod in one or more fixed positions relative to the guide. Each resilient latch is adapted to allow movement of the magnetic rod through the through aperture in either direction, for insertion into the filter or withdrawal from the filter into one of the fixed positions.

A method of separating water from oil includes combining the oil with a magnetite powder to form a mixture and directing the mixture to a closed chamber having a plurality of magnetic field generating elements. The magnetic field generating elements generate a magnetic field sufficient to separate the magnetite powder and oil from water in the mixture, such that the water sinks to the bottom of the chamber. A valve at a lower end of the chamber can be opened to release the water collected at the bottom of the chamber. The method can be used to enhance the quality of crude oil by lowering the Bs &W content in the crude oil.

An inclined magnetic holder comprises a magnetic base and a centrifuge tube support plate. The centrifuge tube support plate has centrifuge tube support holes. The magnetic base comprises a first bottom plate, a fixing plate, and two first-side support plates. Respective top portions of the two first-side support plates are provided with a position-locating slot. Two ends of the centrifuge tube support plate are respectively provided with a position-locating protruding block. The centrifuge tube support holes are evenly and linearly distributed on the centrifuge tube support plate. An elastic circular engagement component for holding a centrifuge tube is provided inside the centrifuge tube support holes. A block magnet is fixed to the fixing plate below and corresponding to each of the centrifuge tube support holes. A north pole or south pole surface of the block magnet faces the centrifuge tube and is parallel to an axis of the centrifuge tube.

The present disclosure relates to, inter alia, devices, systems, and methods for use in the magnetic separation of biological entities from fluid samples. This device includes a magnetic separation chamber configured to receive a fluid sample for magnetic separation, where the magnetic separation chamber includes at least two magnets mounted on the surface or in the wall of the magnetic separation chamber. The device also includes a force provider configured to move the magnetic separation chamber in a side-to-side motion to mix and/or magnetize the fluid sample. In one embodiment, the magnetic separation chamber is in a form of a sleeve and comprises a substantially central channel for loading a vessel containing the fluid sample therein. The systems and methods of the present disclosure involve the use of this device to separate biological entities from fluid samples.

Disclosed herein is a novel method to fabricate magnetic silica nanomembranes using thin polymer cores based on silica deposition and self-wrinkling induced by thermal shrinkage. These micro- and nano-scale structures have vastly enlarged the specific area of silica, thus the magnetic silica nanomembranes can be used for solid phase extraction of nucleic acids. The magnetic silica nanomembranes are suitable for nucleic acid purification and isolation and demonstrated better performance than commercial particles in terms of nucleic acid recovery yield and integrity. In addition, the magnetic silica nanomembranes may have high nucleic acid capacity due to significantly enlarged specific surface area of silica. Methods of use and devices comprising the magnetic silica nanomembranes are also provided herein.

Microfluidic systems and methods are described for capturing magnetic target entities bound to one or more magnetic beads. The systems include a well array device that includes a substrate with a surface that has a plurality of wells arranged in one or more arrays on the surface. A first array of wells is arranged adjacent to a first location on the surface. A second and subsequent arrays, if present, are arranged sequentially on the surface at second and subsequent locations. When a liquid sample is added onto the substrate and caused to flow, the liquid sample will flow across the first array first and then flow across the second and subsequent arrays in sequential order. The wells in the first array each have a size that permits entry of only one target entity into the well and each well in the first array has approximately the same size.

A filter for removing ferrous particles from a fluid. The filter has an outer filter housing and a non-ferrous liner inside the housing. A plurality of magnets are longitudinally extended at intervals outside the liner. An insert inside the liner imparting a directional flow to the fluid inside the filter whereby ferrous particles in the fluid are trapped by the magnets and held against the non-ferrous line.

A process for removing metallic impurities from a product mass flow comprising water-absorbing polymer particles by means of bar magnets, wherein the water-absorbing polymer particles comprise a surfactant and have direct contact with the bar magnets.

A dispersion of suspended single-layer graphene, multilayer graphene, and graphite is used. A magnetic field is applied to the dispersion to separate the single-layer graphene from the dispersion. By applying the magnetic field, the single-layer graphene, the multilayer graphene, and the graphite are situated at different locations in solvent by the difference in the diamagnetism strengths of the single-layer graphene, the multilayer graphene, and the graphite.

A method for magnetic cellular manipulation may include contacting a composition with a biological sample to form a mixture. The composition may include a plurality of particles. Each particle in the plurality of particles may include a magnetic substrate. The magnetic substrate may be characterized by a magnetic susceptibility greater than zero. The composition may also include a chargeable silicon-containing compound. The chargeable silicon-containing compound may coat at least a portion of the magnetic substrate. The biological sample may include cells and/or cellular structures. The method may also include applying a magnetic field to the mixture to manipulate the composition.