Sartorius Stedim Biotech Gmbh

Sartorius Ag

Sartorius

Hans Beer

Klaus Froese

Dietmar Nussbaumer

Duane B Piechocki

Lothar Knoechelmann

Wolfgang Demmer

Hans-Weddo Schmidt

Horst Perl

Eberhard Wunn

Rebecca Petersen

Horst Kluver

Markus Hollas

Dieter Melzner

Manfred Bobbert

Lothar Knochelmann

A membrane having a refined surface as well as to a process and an apparatus for producing such a membrane, and which is useful, in particular, for rapid diagnostic tests for identifying specific analytes in liquid media.

Apparatus for producing surface enhanced membrane

Process for producing surface enhanced membrane

There is disclosed a cellulosic microporous filtration membrane with upper and lower porous protective layers with a porous sponge-type intermediate layer between the two protective layers, wherein the sponge-type structure consists of two isotropic regions having different pore sizes.

Cellulose-based microporous membrane

Supported separation membranes are disclosed wherein the permselective membrane is integral with a polymeric support of non-woven fibers having a particular air permeability, the integral membranes exhibiting far superior lifetimes and retention capability, especially for microorganisms.

Integral supported separation membranes

A process for cross-linking a cellulose hydrate membrane by use of a water-soluble diepoxide in an alkaline solution. The membrane so produced is highly resistant to attack by alkalis, acids and cellulases, and is readily regenerable by alkaline cleaning.

Cross-linked cellulose hydrate membranes

There is disclosed a composite isotropic cellulose nitrate membrane on a polyester support and a method of making the same, the membrane having particular utility as various types of reagent-containing test strips for use in analytical chemistry and medicinal diagnostics.

Composite cellulose nitrate membrane on polyester support

Incompletely condensed aldehyde resin having a large surface area and formed in the presence of large quantities of water under mild conditions is used for removing waste products, such as urea, from the blood in hemodialysis or for removing such impurities from swimming pools or aquariums.

Resorcinol or phloroglucinol condensation product for aqueous mixture

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Boesinghausen, Germany

Hans Beer