Abstract: The absorbing wound dressing which is atoxic, tissue compatible and very well adjusted to the shape of the wound, it is easily removable, protecting from infections or reduces infections in that it absorbs, in addition to the wound excudate, bacteria, fungi, toxins, proteins and inflammation mediators and which is therefore suitable for covering and cleaning of strongly wetting, infected wounds, as well as effected areas in skin and tissue diseases, consists of potentially macroporous particulate mixtures of regenerated cellulose and a carboxylate groups containing polysaccharide derivative. For making it, viscose solutions, which contain the polysaccharide derivative are thermically coagulated, purified and dried, after the deformation.

Abstract: An absorbing dressing for wounds consists of spherical particles of regenerated cellulose of the size 0.05-0.5 mm and a macroporous structure characterized by the cyclohexane regain of the dry material at least 0.2 ml/g. The dressing is prepared from the regenerated cellulose swollen with water by replacement with organic solvents and the subsequent drying of the product swollen with the said solvent and impregnated with a therapeutically active compound.

Abstract: The invention pertains to a cover of wounds in the form of a powder or a dry powdery fluid and is useful in covering and treating of ulcerous and necrotic wounds. It consists of animal or fungous chitin and chitosan in a powdered form of particle size 0.01 to 0.3 mm or of crosslinked dextran in the form of spheric particles of diameter 0.05 to 0.5 mm and of an immobilized protease. Enzymes are chemically bonded to the structure of the biopolymeric carrier and provide cleaning of the wound by dissolution of undesirable protein material, in particular fibrin, necrotic tissues, components of pus, and the like. In addition the adsorption and regeneration effects of powder act to provide suction of exudate and purulent matter infected with bacteria into interstitial capillary space. The cover according to the invention acts by fast cleaning of necrotic defects and speeds up the granulation and healing of the wound. The invention can be utilized in pharmaceutical production.

Abstract: A process of making a wound dressing is suggested, in which a technical conventional viscose solution is mixed with a polysaccharide derivative; the mixture is treated at increased temperatures such that it is thermally coagulated; the coagulate is wetted with a polyalkylene glycol and dried, whereby a particulate structure of the wound dressing is produced.

Abstract: The invention pertains to the absorbing dressing for wounds, which consists of spherical particles of regenerated cellulose of the size 0.05-0.5 mm (preferably 0.05-0.3 mm) and a macroporous structure characterized by the cyclohexane regain of the dry material at least 0.2 ml/g. The dressing is prepared from the regenerated cellulose swollen with water by replacement with organic solvents and the subsequent drying of the product swollen with the said solvent. The porous structure of the dressing warrants that it can absorb excretions of the wound in the amount 1.5 to 5 g water per g of solids; the grainy macrostructure remains preserved during the absorption so that the material applied on the wound in the form of a powder in the layer 2-5 mm thick, in particular 2-3 mm thick, can be without difficulties and almost without pain rinsed away with water.

Abstract: The invention relates to polymers and copolymers of pivaloyloxyalkyl methacrylates which contain structural units of the general formula ##STR1## where R.sup.1 is (CH.sub.2).sub.n.sbsb.1 --O (n.sub.1 =2 to 10) or (CH.sub.2 CH.sub.2 --O).sub.n.sbsb.2 (n.sub.2 =1 to 4) and to the method of their preparation and modification. The polymerization and copolymerization can be initiated by free-radical initiators of the peroxy type or by anionic initiators, e.g., alkali metal alkoxides or butyllithium, and carried out in a solution, bulk or suspension process in the presence of a crosslinking agent or without it. Anionic polymerization may result in stereoregular polymers or may be used for preparation of block copolymers by the "living" polymer technique. The polymers and copolymers can be modified by the partial or total conversion of the pivaloyloxyalkyl methacrylate units into hydroxyalkyl methacrylate units by selective hydrolysis, alcoholysis or other reaction.

Abstract: The invention relates to polymers and copolymers of pivaloyloxyalkyl methacrylates which contain structural units of the general formula ##STR1## where R.sup.1 is (CH.sub.2).sub.n.sbsb.1 --O (n.sub.1 =2 to 10) or (CH.sub.2 CH.sub.2 --O).sub.n.sbsb.2 (n.sub.2 =1 to 4) and to the method of their preparation and modification. The polymerization and copolymerization can be initiated by free-radical initiators of the peroxy type or by anionic initiators, e.g., alkali metal alkoxides or butyllithium, and carried out in a solution, bulk or suspension process in the presence of a crosslinking agent or without it. Anionic polymerization may result in stereoregular polymers or may be used for preparation of block copolymers by the "living" polymer technique. The polymers and copolymers can be modified by the partial or total conversion of the pivaloyloxyalkyl methacrylate units into hydroxyalkyl methacrylate units by selective hydrolysis, alcoholysis or other reaction.

Abstract: The invention relates to polymers and copolymers of pivaloyloxyalkyl methacrylates which contain structural units of the general formula ##STR1## where R.sup.1 is (CH.sub.2).sub.n.sbsb.1 --O (n.sub.1 =2 to 10) or (CH.sub.2 CH.sub.2 --O).sub.n.sbsb.2 (n.sub.2 =1 to 4) and to the method of their preparation and modification. The polymerization and copolymerization can be initiated by free-radical initiators of the peroxy type or by anionic initiators, e.g., alkali metal alkoxides or butyllithium, and carried out in a solution, bulk or suspension process in the presence of a crosslinking agent or without it. Anionic polymerization may result in stereoregular polymers or may be used for preparation of block copolymers by the "living" polymer technique. The polymers and copolymers can be modified by the partial or total conversion of the pivaloyloxyalkyl methacrylate units into hydroxyalkyl methacrylate units by selective hydrolysis, alcoholysis or other reaction.

Abstract: The invention relates to polymers and copolymers of pivaloyloxyalkyl methacrylates which contain structural units of the general formula ##STR1## where R.sup.1 is (CH.sub.2).sub.n.sbsb.1 --O (n.sub.1 = 2 to 10) or (CH.sub.2 CH.sub.2 --O).sub.n.sbsb.2 (n.sub.2 = 1 to 4) and to the method of their preparation and modification. The polymerization and copolymerization can be initiated by free-radical initiators of the peroxy type or by anionic initiators, e.g., alkali metal alkoxides or butyllithium, and carried out in a solution, bulk or suspension process in the presence of a crosslinking agent or without it. Anionic polymerization may result in stereoregular polymers or may be used for preparation of block copolymers by the "living" polymer technique. The polymers and copolymers can be modified by the partial or toal conversion of the pivaloyloxyalkyl methacrylate units into hydroxyalkyl methacrylate units by selective hydrolysis, alcoholysis or other reaction.

Abstract: The invention relates to a method for preparation of cationactive and amphoteric ion-exchangers from non-ionogenic crosslinked copolymers containing hydroxyl groups by their reaction with mineral acids, addition products of sulfur trioxide, sulfuric acid or chlorosulfuric acid with alcohols or pyridine, unsaturated compounds, as acrylonitrile, methacrylonitrile or sodium vinylsulfonate in a strongly alkaline medium, or with halogenoalkylammonium compounds. The starting copolymer containing hydroxyl groups is prepared by the suspension copolymerization of monomers, selected from the group which comprises hydroxyalkyl methacrylates and acrylates and oligoglycol acrylates and methacrylates, with crosslinking divinyl monomers, e.g. divinylbenzene, ethylene dimethacrylate, butylenediol dimethacrylate or diacrylate, and advantageously has the macroporous structure.

Abstract: The invention relates to a method for manufacturing of spherical cellulose particles in bead form which enables to control the partial shape and porosity of the particles. Resulting cellulose sorbents are suitable carriers and materials for chromatography. The invented methods consists in heating a viscose (an aqueous solution of sodium cellulose xanthate) suspension in a water-immiscible liquid to 30.degree.-100.degree. C under stirring to form spherical droplets and solidify them and in the subsequent acidic decomposition of the solid xanthate globules either directly by addition of an acid soluble in the dispersion medium, or additionally after isolation and eventual washing of the particles to achieve the required wet volume. Liquids with the viscosity up to 100 cSt are advantageously used as dispersion medium and surfactants and/or modifying reagents (e.g. epichlorohydrine) may be added to the suspension.

Abstract: Biomasses of mycelia of microorganisms, particularly of fibrous fungi used for retention of metal ions from solutions, particularly of uranium, radium, lead and similar are stiffened by adding polymerizable components to them by polymerization, and the product is subsequently mechanically granulated. The granulated product is then employed in cyclically repeated sorption processing of heavy metal ions by contacting it with solutions of such metals.

Abstract: Biologically active compounds such as enzymes are insolubilized by hydrophilizing a macroporous substantially hydrophobic carrier by hydrolysis of a thin surface layer of the carrier to form free carboxylic acid groups, and thereafter activating the carrier and reacting the activated carrier with a biologically active compound.

Abstract: The invention relates to chemically reactive polymers and copolymers of hydroxyalkyl methacrylate sulfo esters with monomer units of the formula ##EQU1## where n is an integer equal to 1 or 2 and R is C.sub.6 H.sub.5 --, p--CH.sub.3 C.sub.6 H.sub.4 --, or CH.sub.3 -- and to the method of manufacturing the technically useful articles from these polymers, namely crosslinked beads, membranes, blocks, etc., by free-radical polymerization or copolymerization in bulk, solution or in two-phase aqueous dispersion system under conditions whereby the hydrolysis of the sulfo ester is suppressed.