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.

A hydronic system separator has an air separator with a vent release mechanism to remove air from the fluid within a hydronic system. The separator includes a magnetic assembly for collecting ferrous particles from the fluid. One or more screens are used to remove other particles from the fluid. The separator housing includes a removable debris collection receptacle that has a drain assembly.

An axle assembly that includes a housing assembly and a dipstick assembly. The housing assembly may at least partially define a cavity that receives a lubricant. At least a portion of the dipstick assembly may be removably mountable to the housing assembly and may include a fitting and a dipstick.

A magnetic filter according to one embodiment of the present disclosure includes a housing through which fluid or powder containing metal particles passes; magnets arranged inside the housing; and a rotation unit that rotates the magnets so as to revolve around the rotation center, wherein the magnets include first magnets and second magnets located farther from the rotation center than the first magnets, and wherein any one of the second magnets forms an equilateral triangle arrangement with two first magnets adjacent to any one of the second magnets.

A foreign substance capturing apparatus according to an embodiment of the present invention may comprise: a capturing body unit having an inlet port for introducing the air including magnetic foreign substances and an outlet port for discharging the air from which the magnetic foreign substances have been removed; and a magnetic isolation unit connected to the capturing body unit, including a magnetic member for isolating, by an attractive force, the magnetic foreign substances from the air flowing in the capturing body unit, and provided with a non-magnetic member surrounding the magnetic member.

In at least one illustrative embodiment, an electromagnetic filter may include a transfer pipe and multiple electromagnetic filter elements positioned in an interior volume of the pipe. Each electromagnetic filter element includes a support comb, a solenoid coupled to the support comb, and multiple magnetic members arranged in a planar array positioned within an opening of the support comb. Each magnetic member may rotate about an end that is coupled to the support comb. The magnetic members may be magnetostrictive sensors and may include a biorecognition element to bind with a target microorganism. A method for fluid filtration includes coupling the electromagnetic filter between a fluid source and a fluid destination, energizing the solenoids of each electromagnetic filter elements, and flowing a fluid media through the transfer pipe of the electromagnetic filter. The fluid media may be liquid food such as fruit juice. Other embodiments are described and claimed.

The present disclosure relates to a trap device for a powder coating apparatus. The trap device includes a body part including an inlet through which exhaust gas containing lost powder is introduced, an outlet through which the exhaust gas is discharged, and an interior space in communication with the inlet and the outlet and a trap part that is located in the interior space of the body part and that traps the lost powder contained in the exhaust gas by a magnetic force.

An insulating cover for a central heating system filter is provided in two parts. The insulating cover may be made from, for example, expanded polypropylene foam. The cover may include magnets for attracting and retaining magnetic debris within the filter. The cover may include a leadscrew arrangement to assist with removal of the cover from the filter for servicing.

A method for performing a magnetic separation procedure that includes transporting a receptacle containing a fluid medium to a first location of a system, where the fluid medium contains both a sample material and a suspension of magnetically-responsive solid supports. At the first location, the fluid medium is exposed to a first magnetic field for a first dwell period, thereby isolating the solid supports within the receptacle, where no portion of the fluid medium is removed from the receptacle at the first location. The receptacle is then transported from the first location to a second location of the system, where the fluid medium is exposed to a second magnetic field for a second dwell period. Following the second dwell period, at least a portion of the fluid medium is removed from the receptacle. A suspension fluid is then dispensed into the receptacle, and the contents of the receptacle are agitated to suspend the solid supports within the suspension fluid.

A magnetic rod guide for a filter comprises a base for attachment to part of a filter, a through aperture through which a magnetic rod can move, and resilient engagement means including at least one resilient latch for holding the magnetic rod in one or more fixed positions relative to the guide, the or each resilient latch further being adapted to allow movement of a 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.