A membrane capsule for biological and chemical separations comprising a cassette comprising an upper surface and a lower surface adjoined by a cassette sidewall, an inlet and an outlet located on the upper and lower surfaces of the cassette, tubes fluidly connected to the inlet and the outlet, holes or slots in the tubes to facilitate separation, and a membrane wrapped, pleated, and/or spiral wound around each of the tubes. Methods of separation comprising flowing fluid flow through the inlet of the membrane capsule, allowing the fluid to permeate through the holes or slots of the tubes, separating biological and/or non-biological substances, collecting the fluid within a reservoir, and draining fluid from the reservoir.

An infectious agent attenuating or inactivating personal protective equipment device, such as a surgical mask, multilayer mask or respirator having at least one porous filtering layer impregnated with an infectious agent attenuating or inactivating solution that tries to leave behind an infectious agent attenuating or inactivating attenuator composed of an organic acid that preferably is a citric acid, a humectant that preferably is a gelling humectant that preferably is sorbitol which produces or forms a self activating or self replenishing infectious agent attenuator gel and infectious agent attenuating and inactivating air treatment media having a pH of no greater than 5, preferably no greater than 4 and more preferably no greater than 3.5 which is kept moist and activated at or below the desired pH by moisture in the breath of a person wearing the mask. The solution can include a surfactant, such as preferably a rhamnolipid biosurfactant that reduces surface tension both during impregnation of the solution thereby more uniformly impregnating the solution into the at least one porous filtering layer producing an air treatment media having infectious agent attenuating gel more uniformly distributed throughout. The surfactant remains in the gel and reduces surface tension of aerosols and droplets containing viruses and bacteria entrained in the air flowing through the air treatment media contacting the infectious agent attenuating gel more rapidly and efficiently attenuating or inactivating the viruses and bacteria preferably also destroying them by lysing them.

An air filtration system which pulls air into and through the air filtration system filter where the air is exposed to a UV lamp that provides UV light, the UV lamp surrounded by an internally polished aluminum shield or other device made of a material that reflects or enhances kill ability of micro-organisms when exposed to UV light.

Disclosed is a novel air purification composition with antiviral and bactericidal functions, the composition at least comprising the following components in percentage by weight: 0.3%-1% of a black poplar essential oil, 0.1%-1% of a tea tree essential oil, 0.1%-0.5% of a Cupressus funebris essential oil, 0.1%-1% of an Artemisia apiacea essential oil, 0.1%-10% of a Sophora flavescens extract, 0.1%-5% of a ginger extract, 5%-30% of a Cupressus funebris hydrolate, 0.5%-1% of a hyperbranched amino polymer, 0.5%-5% of a surfactant, and the balance being water.

The present invention provides a photo-electronic air disinfector, which comprises a housing containing a fan, a UVC light source, a photocatalyst module consisting of a structure with entire surface area coated with a photocatalyst positioned by the side of the UVC light source, an air guide unit installed with reflecting mirrors on the internal walls of the unit. When air is drawn in the air guide unit of the device, the photocatalyst after absorbing UVC light emitted by the UVC light source or reflected through the mirrors generates superoxide (O2—) and hydroxyl radical (—OH) with strong oxidation power, which can decompose organic matter and various germs in the drawn in air and render them harmless. Sterilization effect of the present invention is four-folded, firstly the air filter removing dusts and germs from the air before entering the device, secondly the photocatalysis produced by the photocatalyst module exposed to direct and reflected UVC light resulting in oxidation process for decomposing organic matter and various germs and rendering them harmless, thirdly UVC light rays and their multiple reflection through the mirrors for bacteria termination, and fourthly negative ions produced and added to the air to condense fine particles into larger ones for settling on the ground and thus reducing harmful pollutants in the air.

A system for providing a centralized aerosol source extraction and filtration system is disclosed. The system includes an aerosol capture component coupled to a set of aerosol capture ductwork being located at or near a patient's mouth while treatment is being provided and is coupled to a set of aerosol capture ductwork, a filter and fan component coupled to the set of aerosol capture ductwork for generating the necessary pressure differential to draw the air about the patient's mouth into the aerosol capture component along with any airborne particulates, contaminants, and pathogens, and a recycled clean air component for returning recycled clean air back to patient areas and workspaces through a set of recycled clean air ductwork arranged to create positive and directional airflow throughout the office space. The filter and fan component has one or more filter layer types to remove particulates, contaminants, and pathogens from an air flow received from the set of aerosol capture ductwork.

The invention describes a method for obtaining purified recombinant Adeno-Associated Virus particles (rAAV), comprising performing a depth filtration of a starting material previously obtained from cells producing rAAV particles comprising a cell lysate and/or a culture supernatant, followed by a first step of anion-exchange chromatography, a second step of anion-exchange chromatography and a final step of tangential flow filtration, whereby purified recombinant Adeno-Associated Virus particles (rAAV) are provided.

In one aspect, a material structure is disclosed, which includes a macroscopic porous substrate configured to receive a flow of a medium for passage of at least a portion thereof through the porous substrate. At least one porous coating is disposed on at least a portion of an inner surface of the porous substrate, wherein the porous coating comprises a matrix having a plurality of interconnected passages. The porous substrate and the coating are configured to treat at least one contaminant, if any, present in the flowing medium.

A photocatalyst filtration system for a vehicle includes a housing having an airflow path, and a filter configured to filter air flowing in the airflow path, the filter having a first photocatalyst and a second photocatalyst. The system further includes a first ultraviolet (UV) light source disposed proximate the filter and configured to energize the first photocatalyst, and a second UV light source disposed proximate the filter and configured to produce light having a shorter wavelength than light produced by the first UV light source, and configured to energize the second photocatalyst. One of the first photocatalyst or the second photocatalyst is configured to remove odor from the air. The other of the first photocatalyst or the second photocatalyst is configured to remove bacteria from the air.

There are provide a cell separation filter with which cells can be separated without damage and can suppress adsorption, a filtering device, and a manufacturing method for a cell separation filter. The cell separation filter is composed of a nonwoven fabric that is formed of fibers containing a water-insoluble polymer and a hydrophilizing agent and has a fiber density difference in the film thickness direction. The nonwoven fabric has an average through-hole diameter of 2.0 μm or more and less than 10.0 μm, a void ratio of 75% or more and 98% or less, a film thickness of 100 μm or more, and a critical wet surface tension of 72 mN/m or more.