Abstract: Arrangement for the treatment of fluent, thin and highly viscous media, particularly for the fermentation of micro organisms, for mixing, pumping and the dissipation of the medium. The arrangement is based on a novel principle of bladeless mixing and pumping of fluent media of any kind and density. The main part of the arrangement is a hollow rotor with a bottom with at least a single inlet opening in the bottom. The rotor is rotated at a speed at which the treated medium due to centrifugal forces proceeds from one end of the rotor to the other one. The medium is discharged from the rotor through one or more outlet openings in the sides or in the top of the rotor; the medium is either only raised, or is also dissipated below or above the level of the fluent medium.

Abstract: The method of circulation according to the invention consists in causing a part of the liquid part to rotate whereby centrifugal forces causes the rotating part of the liquid phase to form a rotating vortical liquid spindle that exerts a suction effect. The liquid to be circulated is then pumped into the spindle by suction, passes through a cavity destined for deposition of solid phase, said cavity being positioned in the space of the spindle, whereafter the liquid passes to the upper part of the spindle and is drawn back into a liquid phase container.

Abstract: A perforated soft contact lens which has at least one perforation formed inside the optical zone of lens, i.e. in the distance 0 to 3.5 mm from the lens center. It is manufactured by placing the lens in a swollen state with its inner surface on an elastic base and pressing a punch perpendicularly to the outer surface. Further possible method of manufacturing consists in sticking the soft hydrophilic lens on a hard base, drying and then drilling the openings, advantageously to the first contact of a drill with the base.

Abstract: The invention pertains to a method and apparatus for the electrochemical analysis of solutions which comprises the measurement of an electric signal between a mercury column in a capillary and a reference electrode which are in contact with the analyzed solution sucked into the capillary. The mercury column in the capillary pulsates during the measurement. Current or voltage may be measured as the electric signal. An apparatus for the analysis of microliter volumes of solutions comprises a vessel for the analyzed solution provided with an inlet and outlet of the analyzed solution and a reference electrode, one end of a capillary is connected to the vessel for the analyzed solution and the other end of the capillary is connected to means for suction and ejection of mercury. A pulsator is attached to the capillary for moving the column of mercury and an electric contact is built into the capillary in contact with the mercury column.

Abstract: A macromolecular compound with antitumor activity in which hydroxy groups in side chains of a polymer have the character of primary, secondary or tertiary alcohols and are completely or in part esterified with carboxyl in the position C4 of 1,2,4-tricarboxybenzene, whereas the carboxyls in positions C1 and C2 bind an atom of platinum with coordination bonded amino ligands.A method for producing the macromolecular compound consists in acylation of the polymer carrying alcohol groups with chloride anhydride of trimellitic acid of the formula II, ##STR1## hydrolyzing the anhydride in the subsequent step, and bonding an atom of bivalent platinum carrying an amino ligand to the formed vicinal carboxylic groups.

Abstract: This invention relates to terpolymers which are capable of forming hydrogels having very good compatibility with living tissues and may be used as substitutes for damaged tissues, as in the form of implants and various prostheses. The terpolymers are comprised of an oligourethane having an average molecular weight from 1200 to 3000, 2-hydroxyethyl(meth)acrylate or 2-hydroxypropyl(meth)acrylate, and N-vinylpyrrolidone.

Abstract: Double-acting mechanical liquid spraying device having a housing which is adapted to be mounted upon and sealed to the neck of a liquid container, and which has a liquid-containing compartment therein. In the housing, aligned with the liquid-containing compartment, there is an operation cylinder which has an annular valve seat disposed transversely to and intermediate the length of such cylinder. Disposed within the liquid-containing compartment is a liquid pumping plunger of the cuff type which cooperates with the valve seat to close the opening through such seat when the plunger is in its forward terminal position, and which is driven to reciprocate within the liquid-containing compartment in forward and reverse liquid dispensing strokes. In each of such strokes the plunger forwards liquid from the liquid-containing compartment to a spray nozzle through a liquid-conducting passage.

Abstract: A universal measuring gauge for geological structures is disclosed, having an application part including an arm and a gib, which is normally attached to it on one side, the arm being, on the other side, shaped into a universal bearing journal (pin), which passes through the bearing bush; two opposite axes equipped, on their ends, with normally fixed inclination indicators, radiate from the bush center; a suspension part including two vertical discs with a protractor scale, pivoted on the mentioned axes and firmly connected with the suspension, the lower suspension part being equipped with a transparent horizontal protractor scale and in the center of the lower suspension part, the upper half-bush of the bearing is formed, the bearing being passed by a hollow pin, carrying the transparent horizontal disc with indices, the hollow pin being axially and radially guided (glided) in the upper and lower half-bushes of the bearing; and an orientation part containing the mentioned lower half-bush, where the lower need

Abstract: The invention pertains to X-ray contrast spherical hydrogel particles based on polymers and copolymers of acrylates and methacrylates and to a method of their preparation.The subject of this invention are X-ray contrast spherical hydrogel particles based on polymers and copolymers of acrylates and methacrylates characterized by the particles of spherical form with diameter 0.2 to 2 mm, which strongly swell in water and contain a derivative of amino-triiodobenzoic acid of general formula I, ##STR1## where R.sup.1,R.sup.2 is hydrogen, acyl group with 1 to 3 carbon atoms or alkyl with 1 to 10 carbon atoms and X is halogen, --OH or --NH(CH.sub.2).sub.n NH.sub.2, where n=1-6, covalently bonded to the polymer skeleton.

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: The invention pertains to a biodegradable implant formed from a gel completely decomposable in body, which contains the antitumour medical - diamminedichloroplatinum addition compound (cisplatin) and to a method for preparation of this implant.An object of the invention is a biodegradable implant, wherein a matrix of the said implant is formed by a starch gel containing 0.2 to 2 wt. % NaCl, plasticized by addition of 1 to 30 wt. % of glycerol, suitably shaped, and contains the homogeneously dispersed microcrystalline cisplatin in the amount of 1 to 15 wt. %.A method for preparation the implant according to the invention consists in a homogeneous mixing of 1 wt. part of a viscous aqueous solution, obtained by dissolution of 0.4 to 4 wt. % NaCl and conversion of 1 to 6 wt. % of starch to a paste by boiling, with 0.1 to 0.8 wt. parts of glycerol, 0.5 to 1 wt.

Abstract: An apparatus is provided for inserting molds containing a dosed monomeric mixture into a rotating polymerizing column by means of an alternate pushing and releasing of a column of molds falling from tubular magazines connected to said polymerizing column. Said apparatus comprises a body fabricated from a non-magnetic material which is adapted on its lower end for a firm affixation to the column and on its upper end for affixation to the magazine, and being provided with a through-opening of a diameter which is larger than the diameter of the molds, another through-hole, leading to said through-opening, which is formed perpendicularly to the axis of the said through-opening, movable jaws being movable one against the other and moved in the direction of the center by springs, and two stationary blocks placed outside said body in an opposite position while at least the outer ends of the jaws and the stationary blocks are constructed from materials which provide a mutual counterpole magnetic interaction.

Abstract: Certain esters of 3-(adenin-9-yl)-2-hydroxypropanoic acid are disclosed which exhibit an improved broad spectrum antiviral activity while having a low toxicity for living cells. They can be used for treatment of virus diseases in human and veterinary practice.

Abstract: Hydrophilic three dimensional polymers, the prevailing mass of which is formed by structural units corresponding to monomers miscible with water at any ratio, and the method for their production, wherein one weight part of the monomers miscible with water is copolymerized, by the effect of free-radical initiators, with 0.01 to 1 weight part of a polyfunctional unsaturated oligomer, which is prepared with an average degree of polymerization x=3 to x=100 by the anionic polymerization of allyl methacrylate, with the contingent addition of methacrylonitrile or methacrylic esters of univalent saturated alcohols containing 1 to 4 carbon atoms or methacrylic esters of monohydroxy compounds containing at least one etheric oxygen atom in the chain, or where 0.7 to 1 weight part of monomers miscible with water is copolymerized with 0.01 to 0.

Abstract: Graft copolymers are formed having a backbone formed by monomeric units, selected from the group of vinyl monomers comprising acrylates, methacrylates, acrylamide, styrene and N-vinyl-2-phyrrolidone, and side branches formed by 10-80 wt. % of oligourethanes based on aliphatic, aromatic and alkylaromatic diisocyanates and low-molecular-weight diols with 2-4 carbon atoms in the molecule. The graft copolymers are prepared in two steps: the first step consists in the synthesis of oligourethane with the terminal unsaturated group; the second step is the radical copolymerization of this oligourethane with the above vinyl monomers.

Abstract: Two plane-parallel prisms are placed in the optical axis of the examined eye, fitting close to each other in a horizontal plane lying in the optical axis. The prisms are rotated relative to one another in opposite directions at the same angle with respect to the optical axis, and having their parallel vertical optical surfaces parallel with their axis of rotation which intersects the optical axis. One prism is fixed to a scale. Two light sources are placed in a horizontal plane which passes through the optical axis and which are movable independently of one another, while their position with respect to the optical axis and to the examined eye is indicated on respectively associated scale.

Abstract: A centrifugal casting device employing a rotatable polymerization column adapted to accommodate a plurality of vertically aligned molds and a rotatable mold-dispensing magazine disposed at an angle .alpha. to the polymerization column and adapted to dispense molds one at a time into the polymerization column.

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: Apparatus for stimulating acupuncture points by light radiation in the visible light range or in the infrared range for medical purposes. An advantage of the apparatus of the invention resides in utilizing a very economical source of stimulating radiation, the radiation of which may be easily modulated and accurately focused, which considerably increases the efficiency of stimulation. An electrically conductive contact for locating acupuncture points, mounted directly in or on a transparent cover of a luminescent chip of a light emitting diode makes the locating of acupuncture points easy and accurate.