44 results about "Capillary membrane" patented technology

A three-dimensional (3-D) culture “Petri-dish” for research in regenerative medicine, biotechnology and clinical translation is described. This 3-D perfusion culture dish is to advance in vitro culture tools from static 2-D to dynamic 3-D perfusion culture. Interwoven hollow fiber capillary membranes divide the “Petri-dish” culture space into a controllable 3-D pattern of different compartments, serving the functions of the organ's larger vasculature. These physically active scaffolds, which can be suitable for cell adhesion or cell aggregate immobilization, offer a supply of cells with high-performance mass exchange including gas supply and under perfusion conditions. In contrast to static and discontinuous medium supply, a dynamic culture can be achieved with continuous or alternating medium supply and integral oxygenation. They provide a more physiologic supply in the cell macro environment, including homeostasis of oxygen, pH, nutrition, soluble factors, and gradients of metabolites for the cells. Also, medium perfusion can be achieved. Consequently the invention was made for cultures at tissue density, especially stem cells and support cells, which strive to create their own stem cell niche.

An artificial “arterio-venous” permeable hollow fiber capillary membrane system for wound treatment is described, that can be placed onto a wound, under the wound dressing, to enable fluid-/mass exchange, and thus enables pH- and electrolyte regulation, the supply of factors/mediators/medications, the removal of secretion- and/or waste material, and the support of therapeutically applied cells in the wound.

The present invention relates to a method of dynamic contrast magnetic resonance imaging aimed to improve characterization of tissue image by improving accuracy of computed pharmacokinetic parameters such as K^trans (transfer constant across capillary membrane; a pharmacokinetic parameter of tissue perfusion) using T1W Fast DCE-MRI technique to distinguish between malignant, benign and normal tissues. A phantom and a contrast agent are used in the proposed MRI system for computing accurate T₁ value of a tissue after the contrast is injected based on an intrinsic T₁₀ value the tissue, wherein the intrinsic T₁₀ value is adjusted and/or normalized to improve accuracy of the T₁ value computed, which in turn is used for computation of pharmacokinetic parameters at least one of K^trans.

The present invention relates to a filtration system for filtration of domestic water, wherein the filtration system comprises at least one capillary membrane module, said capillary membrane module comprising a number of hydrophilic capillary membranes. According to a preferred embodiment the capillary membrane module has a feeding side for inlet of untreated domestic water, a permeated side for outlet of treated water, and a concentrate side for outlet of rinsing water, wherein a rinsing or flushing valve is arranged on the concentrate side for opening and closing of the rinsing water outlet, said rinsing or flushing valve having an inlet side and an outlet side. The use of hydrophilic capillary membranes leads to the result that when the rinsing or flushing valve is opened during operation, then a backwards flush of the membrane walls from the permeate side to the concentrate side is obtained with the result that the system can be operated for long periods of time without any renewal of membranes or without performing a manual rinsing of the system.

The present invention relates to high temperature resistant insulation continuous sheet material and the production method thereof. The present invention is characterized in that the content of the insulation sheet material composition quality adopts 10 percent to 75 percent of aramid short-cut fiber, 10 percent to 70 percent of aromatic polyamide capillary membrane, zero to 65 percent of high temperature resistant short-cut fiber, zero to 30 percent of mica, and zero to 10 percent of additives. The utility model has the following production method that: (a) under the condition of dispersed strong shear force, dispersed original sizing material A containing the aramid short-cut fiber and the high temperature resistant short-cut fiber is formed in the water; (b) under the condition of dispersed strong shear force, dispersed sizing material B containing the aromatic polyamide capillary membrane is formed in the water; (c) the two dispersed sizing materials of the A and the B are mixed and ultrasonic dispersed, and then are added with the mica and the additives to obtain the mixed sizing material; (d) the mixed sizing material is wet shaped and dehydrated after being added with water; (e) the mixed sizing material is wrung and dried; (f) the mixed sizing material is shaped after high temperature hot pressing. The sheet material provided has the good mechanical performance, the heat resistance and the electrical insulation performance, and can be used in the electrical insulation field such as motors, transformers, etc.

The present invention is process of preparing tubular porous membrane with high permeating flux. The process includes the following steps: mixing certain amount of additive, solvent, polymer and magnetic material through vibrating in certain temperature to compound homogeneous suspension; defoaming; wet or dry spinning to form capillary membrane or wet and dry phase converting to coat porous pipe to form membrane; and applying 100-18000 gauss cross magnetic field during evaporating and coagulating to form membrane. The tubular porous membrane with high permeating flux may be applied alone or as the porous support material for composite membrane.

The invention provides a novel membrane material for membrane distillation. The membrane material has the remarkable characteristics of high throughout and high heat efficiency in the membrane distillation and related membrane process on the basis of unique structure property of the aerogel. The membrane material comprises the following contents: (1) the membrane material can take a single aerogel membrane as an MD (Membrane Distillation) membrane and can be also a composite aerogel MD membrane which is formed after the aerogel and other membrane materials are compounded; (2) the form of the aerogel MD membrane can be a flat membrane, a spiral roll-type membrane, a tubular membrane, a hollow fiber membrane or a capillary membrane; and (3) the aerogel MD membrane can be used for membrane distillation and any related membrane process and is characterized in that mass transfer mechanisms are both that a water solution is blocked by the membrane, and water vapor or steam of volatile components can permeate through membrane holes. The invention greatly improves the throughout and the heat efficiency in the membrane distillation and related membrane process by utilizing the unique structure characteristics of the aerogel.

The invention relates to a method for washing membrane filter, wherein it wash reversely and clockwise to clean the membrane element; when the flux and quality of membrane element are reduced, it starts to wash; stops feeding material into membrane element; clockwise pump washes the membrane element to fill washing liquid into the membrane; starts the reverse pump; stops washing; repeats aforementioned process until the flux of fiber membrane or capillary membrane is recovered. The invention can completely wash out the pollutant in the membrane, with low water consumption.

Apparatus for filtration of contaminated water, characterised in that the apparatus is provided with a housing (1) which, when oriented for proper use, comprises—a contaminated water inlet (2) and a drain (8, 13),—a water filter in the housing, the filter comprising capillary membranes (3) embedded in a sealant at their upper and lower side such that they are completely sealed against the housing, —a permeate connector (5) for the drainage of the permeate, —a backwash connector (6) for the backwashing of the membrane at the housing, —a manually activated pump (9, 10) connected to the back-wash connector, wherein the backwash connector (6) is located under the permeate connector (5).

The invention discloses a membrane filter with double filtration, which belongs to the fields of environment-friendly water treatment technologies and membrane separation technologies. The membrane filter is particularly suitable for an immersed membrane bioreactor (MBR). The membrane filter with double filtration is characterized by consisting of a plurality of membrane filtering units, wherein a plurality of capillary membranes are wrapped and protected by virtue of a mesh filter sleeve. As each capillary membrane is provided with a protecting jacket, the problem that the root part of each capillary membrane is fragile is solved; due to being filtered by the mesh filter sleeve, fiber matters have no chance to contact and wind the capillary membranes; as the fiber matters outside membrane bundles are relatively easy to be removed though a mechanical method, the trouble of damaging the capillary membranes by the fiber matters does not need to be worried about; and as produced water is filtered through a filter cloth filter sleeve and the capillary membranes, the quality of the produced water is better ensured.

The invention discloses a membrane filter with a waterweed type double filtration function. The membrane filter belongs to the technical field of environment protection water treatment and membrane separation and is particularly suitable for an immersed type membrane biological reactor (MBR). The membrane filter with the waterweed type double filtration function is characterized by comprising a plurality of membrane filter units, wherein each capillary membrane is closed on one end, and is packed and protected by a mesh cloth filter sleeve provided with one closed end. A protective membrane is respectively provided for each bundle of capillary membranes, so that a problem that roots of the capillary membranes are weak is solved; the mesh cloth filter sleeve filters fiber substances, so that the fiber substances cannot contact and wind with the capillary membranes; blocked larger suspended matters, particularly the fiber substances leave the mesh cloth filter sleeve under an action of gas disturbance, thereby achieving upward barrier-free floating. The mesh cloth filter sleeve and filter units combined by the plurality of capillary membranes are very tall and straight, and can be independently erected in water, thereby avoiding winding of the filter units; besides, produced water is filtered by a filter cloth filter sleeve and the capillary membranes, so that quality of the produced water is ensured better.

Membrane module for testing active substances in cells with an interior chamber (2) which is limited by a lid (3), a bottom (4), and a side wall (5) and a system of first capillary membranes (6) and a system of second capillary membranes (11) located therein and possibly additional systems of capillary membranes, whereby the capillary membranes in interior chamber (2) are arranged in at least one flat layer parallel to bottom (4) and in interior chamber (2) in the extracapillary space a cell culture chamber is formed around the capillary membranes, whereby the capillary membranes have a lumen that can be filled with a fluid, are passing with at least one of its ends through the side wall (5) of interior chamber (2) and are embedded at this end separated by systems in a casting material (9, 10) so that interior chamber (2) is sealed fluid-tight from the outside, and whereby the capillary membranes of each system are in a fluid connection with their lumens with an inlet device (7) and/or an outlet device (8), and whereby interior chamber (2) has a volume between 0.1 and 5 cm3.

The invention relates to a membrane filter for water treatment, comprising a head piece including a permeate collecting chamber with a permeate outlet, and at least one fiber bundle made from capillary membranes, which are secured into the head piece with an end that is open towards the permeate collecting chamber and sealed on the opposite end thereof. The head piece contains an air duct to which the mouth piece that protrudes into the fiber bundle is connected with at least one air outlet. At its other end, the fiber bundle terminates in freely movable manner in the untreated water.

The present invention relates to methods of treating subjects with alveolar capillary membrane injury or methods of preventing alveolar capillary membrane injury in subjects, with the methods comprising administering to the subjects a therapeutically effective amount of ergothioneine and a pharmaceutically acceptable carrier. The invention also relates to methods of screening candidate compounds for their ability to mitigate the effects of alveolar capillary membrane injury.

The invention relates to a water filter device for local disinfection of domestic water and/or drinking water, the water filter device comprises a filter housing (10), which is provided with an inlet joint (11) and an outlet joint (12) , several capillary membranes (20) are arranged in the filter housing (10), the first end (21) of the capillary membrane is open, and the other end (22) is closed, and the capillary membrane (20) The first end (21) is molded into a membrane holder which closes the space between the capillary membrane (20) and the filter housing. The membrane is a microfiltration or ultrafiltration membrane with an asymmetric pore structure, the pore structure is asymmetric, and the diameter of the pores decreases gradually along the flow direction of the liquid through the membrane wall. The membrane is made of polyethersulfone/polyvinylpyrrolidone polymer (PES/PVP polymer). Depending on the practical application, the minimum diameter of a hole with an asymmetric structure is 0.01 to 0.3 μm on one side.

The present invention relates generally to a method of diagnosing or predicting the development of lung damage and more particularly, to a method of diagnosing or predicting the development of alveolo-capillary membrane damage. The method of the present invention is useful inter alia for detecting lung damage or predicting the development of lung damage such as that caused by noxious agents or as an undesirable side effect resulting from exposure to a therapeutic agent and for monitoring the progress of lung damage.