Abstract: A method of isolating a biological material by a) providing a biological material which is bound to a porous matrix (C11), and b) compressing the matrix under conditions where the biological material is released from the surface of the matrix into an elution liquid. brings about the advantage that the emission of aerosols into the environment is greatly reduced. It is also possible to obtain highly concentrated and minute amounts of solution. The method is also easy to automate.

Abstract: Subject matter of the invention is a method of binding a biological material to a solid phase by providing a sample liquid containing the biological material in a sample vessel (A) having an inner contour (A17); then a hollow body (C) which has a contour (C12) that matches the inner contour (A17) is introduced into the sample vessel (A) while being closed with respect to the sample vessel by means of a porous matrix (C11); the sample liquid can enter the structural form (C) through the porous matrix (C11). This method is easy to automate and reduces the generation of aerosols.

Abstract: A lid for closing an opening of a vessel includes a lid body configured to engage the opening, with the vessel having a defined shape. The lid body includes an engagement part which engages a corresponding surface of the vessel, thereby closing the opening. A handling element is disposed on an outer portion of the lid, with the handling element extending in parallel with an axis of the vessel. The handling element is for handling the lid for opening and closing the vessel.

Abstract: A vessel for reducing contamination of liquids is formed of a vessel body with an inlet opening and an outlet opening therein. A closing device is attached to the vessel body adjacent the outlet opening. The closing device closes the outlet opening, and includes a normally closed one-way valve which is openable by a predetermined pressure from within the vessel body.

Abstract: The present invention provides stabilized compositions of tetrazolium salts for analytical purposes which contain 1 to 10 moles of a complex forming acid which is soluble in polar solvents, per mole of tetrazolium salt. Additionally, the invention provides a process for the detection of reducing materials, wherein a stabilized composition as described is added to a test batch.

Abstract: The present invention provides stabilized compositions of tetrazolium salts for analytical purposes, wherein they contain 1 to 10 moles of a complex-forming acid which is soluble in polar solvents per mole of tetrazolium salt.The present invention also provides a process for the detection of reducing materials, wherein one of the above stabilized compositions is added to a test batch.

Abstract: The present invention provides a method of improving reagent elution from a reagent strip comprising a handle on one end which is affixed an absorbent carrier impregnated with a reagent. The absorbent carrier is pressed against the handle by a thin mesh which is stuck or sealed on to the handle on opposite sides of the carrier.Another mesh is between the carrier and the handle. When the carrier is immersed in a liquid, the meshes improve the elution of the reagent into the liquid.