Abstract: Method for the cationic polymerization of at least one olefinic monomer and more particularly the homopolymerization of a mono-olefinic monomer such as isobutylene and the copolymerization thereof with a di-olefinic monomer (diene) such as butadiene and optionally another mono-olefinic monomer in the presence of, as initiator of a halide of tetravalent vanadium, titanium and zirconium, an activator and under the influence of visible ultraviolet or infra-red light.

Abstract: A process is provided involving the use of hydrogen for the separation of uranium and plutonium and mixtures thereof, from composite substances and assemblies or mixtures containing metallic and ceramic components where the metallic component is zirconium or a zirconium alloy and the ceramic component contains uranium and/or plutonium.

Abstract: A method for the preparation of a hydrophilic acrylonitrile-containing polymer comprising admixing a solution of said polymer in 47% to 75%, preferably 50 to 72% concentrated HNO.sub.3, with solid particles of a substance insoluble in said acid solution and soluble in water, aqueous solutions of said substance being operative to precipitate said polymer from said HNO.sub.3, shaping the mixture of the dissolved polymer with said solid substance to a desired physical shape, coagulating said shaped polymer in an aqueous medium and washing said solid particles out from the coagulated polymer, and articles made therefrom.The added solid substance either may react with nitric acid forming a water-soluble nitrate, or it may remain in the mixture unchanged.

Abstract: Method for the cationic polymerization of at least one olefinic monomer and more particularly the homopolymerization of a mono-olefinic monomer such as isobutylene and the copolymerization thereof with a di-olefinic monomer (diene) such as butadiene and optionally another mono-olefinic monomer in the presence of, as initiator of a halide of tetravalent vanadium, titanium and zirconium, an activator and under the influence of visible ultraviolet or infra-red light.

Abstract: An improved detection apparatus employable in liquid chromatography for analyzing a selected non-volatile phase of a liquid effluent is described. A vibrating capillary tube is coupled to the effluent source for atomizing the effluent. The atomizer communicates with a first end of a heated separation column, which is in further communication with a carrier gas source. The non-selected components of the effluent are volatilized in the separation column, while the non-volatilized phase is propelled by means of the carrier gas out of the separation column and through a suitable sensor via a control valve such as a diaphragm. The sensed selected phase is thereupon recorded and analyzed in a conventional manner.

Abstract: The invention relates to quaternary cationic monomers and polymers and copolymers prepared thereof, based upon salts of methacrylic or acrylic esters of the general formula I ##STR1## where R.sup.1 is H or CH.sub.3r.sup. 2 is CH.sub. 3 , C.sub. 6 H.sub. 5 or p-CH.sub. 3 C.sub. 6 H.sub. 4n is 1 or 2, andY.sup.+ is --N.sup.+(CH.sub.3).sub.3, --N.sup.+(CH.sub.3).sub.2 CH.sub.2 CH.sub.2 OH, ##STR2## where R.sup.3 is H, CH.sub.3, CONH.sub.2, CHO, COCH.sub.3 andR.sup.4 is H or CH.sub.2 CH.sub.2 OH.The invention further relates to some methods for preparation of monomers, polymers and copolymers of the aforegiven salts. The polymers and copolymers exhibit the properties of polyelectrolytes and ion exchange resins.

Abstract: The invention relates to a process of manufacturing native microbial protein with a low content of nucleic acids, the product being useful as food or feed. The products obtained by the process of the invention may be widely used in the food industry, especially in the meat, milk, and bread industries. These products may replace meat or milk and can also be used in the nutrition of animals. The products may also be used as substitutes for casein, in the fortification of flour, or to improve the quality and value of bread and the like.

Abstract: A separating analysis, particularly a continuous quick chromatographic analysis is performed by introduction of doses of the sample to be analyzed into a separating column at pseudorandom sequences and by detecting concentrations of components of the sample at the output of the separating device at a rhytmus of the dosing orders and evaluating the separating analysis by summarizing the read values.

Abstract: Tetrachloroethoxyethyl acrylate and tetrachloroethoxyethyl methacrylate of the general formula ##STR1## are provided, where X is a hydrogen atom or CH.sub.3 radical. Also their homopolymers and mixed polymers are combined with vinyl and diene compounds. The aforesaid monomers are prepared by reacting the compound of the general formula ##STR2## with thionyl chloride, preferably in presence of compounds able to bind released hydrogen chloride, such as organic or inorganic bases, for instance, pyridine, triethylamine and sodium carbonate.

Abstract: Novel nitrophenyl and halophenyl compounds having a side chain substituted with hydroxy or ether radical useful for insect control.

Abstract: The position of a diffraction grating in a spectral device is controlled by an arm fixed to a rotatable table supporting the grating. The arm rests against a cam receiving a straight line motion in a direction parallel to the light beam impinging on the grating and passing beyond the rotation axis of the rotatable table.

Abstract: An improved isotachophoretic column for separating ions in a test sample is described. The column is formed from a main unitary insulating body, in which appropriate passages are formed to define (a) a pair of chambers for holding leading and lagging electrolytes, respectively, (b) a capillary through which ions of the material to be analyzed are passed in the presence of the electrolytes, (c) channels for interconnecting the electrolyte-holding chambers with opposite ends of the capillary, and (d) a channel for injecting the test sample into one end of the capillary. The capillary has a planar profile, with at least one of its parallel boundary walls defined by one region of the unitary body. The other boundary wall of the capillary is either formed from a second region of the unitary body itself, or by a surface of a separate insulating body that is attached to the main body.

Abstract: Monomeric conjugated or unconjugated organic compounds are polymerized in an initiator system consisting of an organic peroxide and a macromolecular compound containing at least one tertiary amine group chemically bound by all its valences to carbon atoms in a macromolecule, and a method of making same.

Abstract: The invention is for a process for the controlled polymerization and copolymerization of monoolefinic and diolefinic monomers, which are able to polymerize by a cationic mechanism and particularly for the polymerization of isobutylene and copolymerization thereof with butadiene in the production of vulcanizable butyl rubber. The polymerization reaction is initiated by halides of tetravalent vanadium, titanium and zirconium. In the presence of activating agents, which are chozen from alkali metals, alkaline earth metals, their amalgams and the hydrogen compounds (hydrides) of the metals of Groups I, II, III and IV of the Periodic Table accelerated by irradiation, particularly by light. The polymerization may be carried out at 0.degree. C to - 140.degree. C with the molecular ratio of the initiator to the activating agent ranging from 100 to 0.01 and its rate is controlled by the intensity of irradiation and by dosing of the catalyst components.

Abstract: There is disclosed a carrier for biologically active compounds comprising a hydrophilic polymeric macroporous gel including a copolymer of a hydroxy alkyl ester of acrylic or methacrylic acid and a member selected from the group consisting of a cross-linking acrylate or methacrylate derived from the corresponding acid and a bi- or trifunctional alcohol and bismethacrylamide, bisacrylamide and divinylbenzene, the hydroxy alkyl ester further containing the reaction product thereof with BrCN.

Abstract: Soluble, hydrophilic polymers suitable for medical use and as blood plasma substitutes comprising low molecular weight polymer derived from at least one monomer of an acrylamide type material or a mono-ester of an acrylic type acid and a glycol which is condensed with bifunctional compounds to form a condensation polymer having increased molecular weight and enzymatically cleavable cross-links. The hydrophilic polymer is produced by polymerizing the acrylamide type material or mono-ester mentioned above to form a low molecular weight polymer which is then condensed with a bifunctional compound to form a high molecular weight condensation polymer having enzymatically cleavable cross-links.

Abstract: Process for polymerization and copolymerization of momo-olefinic monomers, such as isobutylene, either with one another or with dienes, catalyzed by tetravalent metal halides, and initiated or accelerated by the action of ultraviolet, visible or infrared light. The polymerization or copolymerization can be affected with or without solvent. Suitable solvents are aliphatic, aromatic or halogenated hydrocarbons. The polymerization is carried out at a temperature in a range of from about -140.degree. C. to about +30.degree. C.

Abstract: The invention relates to a method for manufacturing anionic polyamies, copolyamides and lactam oligomers with a chemically bonded dye. The dyes are of the general formulaX -- Ar -- N = N -- Ar -- Ywherein Ar is aromatic nucleus, Y is X, H, alkyl, alkoxy, aralkyl or dialkylamino and X is the group ##EQU1## wherein R is alkyl, cycloalkyl, aryl or aralkyl and R.sup.1 is R or H. The dye materials are used as effective co-catalysts for providing thermally stable coloring in the anionic polymerization of lactams giving rise to polyamides containing almost 100% of the original color absorption.

Abstract: The invention relates to a method for preparation of hydrophilic cation exchangers by a chemical modification of crosslinked copolymeric gels containing reactive hydroxyl groups and based on hydroxyalkyl, oligoglycol or polyglycol acrylates and methacrylates and hydroxyalkylacrylamides or hydroxyalkylmethacrylamides. The modification is carried out in reactions of hydroxyl groups with halogenalkane acids and their derivatives, anhydrides and halides of dicarboxylic acids or carbodiimides. If the modification agent contains several reactive groups, the remaining functional groups after modification may be allowed to react with dicarboxylic, polycarboxylic, hydroxycarboxylic or aminocarboxylic acids, or phosphoric or sulfuric acid, halogenoepoxides, diepoxides or polyepoxides. The hydroxyl groups can be also modified by oxidation to carboxylic groups by common oxidants.

Abstract: The tendon prosthesis of the invention consists of a core formed of from a synthetic, preferably hydrophilic linear polymer oriented substantially in the direction of the main longitudinal axis of the prosthesis, having a tensile strength exceeding 100 kg/cm.sup.2 and an elastic elongation of 8 - 50 percent, preferably 12 - 25 % of the resting length, and a sheath consisting of one or more layers of a hydrophilic, substantially non-oriented, physically or covalently crosslinked polymer with an equal or higher elastic elongation and an approximately equal or higher hydrophilicity than that of said core. The material of the core and particularly that of the sheath are permanently compatible with living tissue.