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Jerker Porath

Sven O Oscarsson

Bo Ersson

A hydrogel product for adsorption wherein water non-soluble support matrix is cross-linked with polymers which give rise to a water swellable adsorbent. As support matrix an organic polymer or a combination of such are used; e.g. polysaccharides such as agar, cellulose, or starch, proteins and components of proteins and polysaccharides. The support matrix is substituted with a first soluble polymer material chemically bound to the support matrix, whereupon additional polymer materials are built into the primary synthesized support matrix polymer complex through different kinds of cross-oinks whereby optionally the support matrix is present in the form of an acid- and base-stable residue.

Hydrogel product for adsorption purposes

Alkali resistant protein adsorbent

Heavy metals can be fixed to solid carriers to which an .alpha.-amino- or an .alpha.-iminohydroxamate ligand has been covalently bound. The ligand can have the structural formula ##STR1## wherein R.sub.1 and R.sub.2 represent H or an alkyl, or may be a compound of two or more hydroxamate substituents. The carrier can be formed of polysaccharides, polygalactanes, polyacrylates or silica dioxide. The adsorbent is prepared by an .alpha.-aminohydroxamate in an aqueous solution having a pH value of 4-9 being brought into contact with an aldehyde derivative of a carrier, followed by reduction with sodiumborohydride or sodiumcyanoborohydride.

Metal ion binding product to inhibit bacterial growth for the

The adsorbent consists of a solid phase, completely or partially penetrated by or surface-coated with a hydrophilic molecular polymer netting to which has been bound substituents or cross bridges having chain sequences of the structure

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Lidingo, Sweden

Jerker Porath