A catalytic composite is formed of a catalytic layered assembly including a porous catalytic fluoropolymer film and one or more felt batts connected with the porous catalytic fluoropolymer film. At least one felt batt is positioned adjacent the upstream side of the porous catalytic fluoropolymer film to form the catalytic composite. The fluoropolymer film is perforated to allow for enhanced airflow therethrough while retaining the capability of catalyzing the reduction or removal of chemical species in fluid flowing through the catalytic composite.

A method for preparing a nanoporous membrane includes alternatively repeating, on the surface of a porous substrate, the laminating of a hydrophilic homopolymer and the laminating of an amphiphilic block or graft copolymer to provide a polymer multilayer film in which the alternative laminate of the hydrophilic homopolymer and the amphiphilic block or graft copolymer is formed. The polymer multilayer film is annealed to form a microphase separated polymeric membrane. The laminating of a hydrophilic homopolymer and the laminating of a supramolecular structure compound are alternatively repeated, on the surface of the polymeric membrane, to form the alternative laminate of the hydrophilic homopolymer and the supramolecular structure compound.

Provided are a CO.sub.2 gas separation membrane, a method for manufacturing the same, and a carbon dioxide gas separation membrane module including the same, the CO.sub.2 gas separation membrane including: a first layer (A) containing at least one alkali metal compound selected from the group consisting of an alkali metal carbonate, an alkali metal bicarbonate and an alkali metal hydroxide, and a first resin in which a polymer having a carboxyl group has been crosslinked; a second layer (B) containing at least one of the alkali metal compounds, and a second resin having a structural unit derived from a vinyl ester of a fatty acid; and a hydrophobic porous membrane (C).

Described are filter materials including a polyol ligand, such as n-methylglucamine, and/or a polyphosphonic acid ligand, which are highly effective for filtering metals or metal ions from fluids. The filter materials can be particularly useful to filter basic and acidic fluid compositions, such as those used for wet etching, removing photoresist, and cleaning steps in microelectronic device manufacturing.

An inline filter housing with a biodegradable, hydrophilic material that operates in conjunction with a field sampling apparatus to both concentrate field sampled environmental DNA particles from water samples and to automatically preserve the captured DNA via desiccation, thus avoiding filter membrane transfer steps, chemicals or cold storage preservation requirements. The hydrophilic filter housing is capable of rapidly preserving the field sampled environmental DNA captured on the filter membrane at ambient field temperatures.

A vesicle incorporate a transmembrane protein, the vesicle forming material including a mixture of poly(ethylene glycol)-block-poly(propylene glycol)-block-poly(ethylene glycol) and polyetheramine. The vesicle can generally withstand elevated temperature without substantial shrinkage of the diameter, which in turn results in maintenance of the water permeability virtually unaffected. Pluronic based vesicles have a large content of amino groups available on the surface illustrated by the larger zeta potential values available for crosslinking in the polyamide layer by chemical reaction with trimesoyl chloride (TMC).

Provided is a method for preparing a gas separation membrane, the method including forming a porous layer by coating a hydrophilic polymer solution on a porous substrate; and forming an active layer by coating a composition for forming an active layer including a polymer of Chemical Formula 1 on the porous layer,

##STR00001## wherein in Chemical Formula 1, n is the number of a repeating unit, and is an integer of 500 to 3,000, and R1 to R5 are the same as or different from each other, and each independently is hydrogen, an alkyl group, or (CO)R6, and R6 is an alkyl group, wherein the polymer of Chemical Formula 1 is included in an amount from 1% by weight to 5% by weight based on the composition for forming an active layer, and a gas separation membrane prepared using the same.

A hybrid type filtration structure for filtering liquid includes a first active layer, a porous supporting layer and a permeable layer. The first active layer has a first nano pore inner wall of which a function group included compound is combined with. The porous supporting layer has a plurality of pores and is disposed under the first active layer. The permeable layer is disposed under the porous supporting layer. The porous supporting layer includes a plurality of lipid bilayers having membrane protein inside of the pore, a molecule of water selectively passes through the membrane protein. The first nano pore passes through the first active layer vertically. The first nano pore and the pore are connected with each other through which liquid flows.

An apparatus is disclosed for separating and preserving biomolecules of a biological fluid sample. The apparatus includes an assembly having sides forming a hollow shape having a first opening at one end and second opening at the opposite end, a sample mixing chamber positioned adjacent the first opening within the assembly, the sample mixing chamber from which a flow of the biological fluid sample is actuated in a direction from the sample mixing chamber to the first matrix layer, the sample mixing chamber being in a direction downstream of the first opening, a first valve positioned between the sample mixing chamber and the first matrix layer, the first valve configured to control the flow to the first matrix layer, a first input in fluid communication with the sample mixing chamber and positioned upstream of the first valve, a second input positioned between the first matrix layer and the second matrix layer, and a second valve positioned between the second matrix layer and the second opening, the second valve configured to control the flow to the second matrix layer.

A filter medium including: a porous first support; nanofiber webs respectively stacked at the upper and lower parts of the first support, and made of a plurality of nanofibers of which the diameters have a standard deviation of 300 nm or less; and a porous second support interposed between the first support and the nanofiber web. The filter medium is implemented by fibers having uniform diameters, and thus is easily manufactured to have a predetermined pore diameter and simultaneously has excellent uniformity of the pore diameters, thereby having excellent filtering efficiency and being more suitable when selectively separating specific objects. Backwashing is enabled at uniform pressure during backwashing such that high cleaning power is obtained. The filter medium has excellent water permeability and excellent mechanical strength so as to minimize the shape and structural deformation and damage of the filter medium.