Abstract: The invention relates to an injection syringe, comprising a housing (1) for receiving a medicament ampoule, a plunger displaceable in longitudinal direction of the housing for pushing a sealed body into a medicament ampoule; a holder (2) for an injection needle unit (3) having a cannula attachment (3.1) that is releasably inserted into the holder (2), said attachment containing an annular flange (3.2) on its back end and a cannula (3.3) being is inserted into said attachment. The injection syringe also comprises an expanding sleeve with elastic expanding elements (13), their front ends having noses (14.1) oriented radially inward, which grasp the flange ring from behind when the injection needle units are inserted into the holder, in addition to radially oriented expanding projecting elements, the back ends of said elastic expanding elements being mounted on the cylindrical ring (12) that is fixed to the housing of the syringe (1).

Abstract: The present invention provides methods of directly stimulating neural tissue with optical energy. By stimulating neural tissue at wavelengths, laser pulses, and spot sizes disclosed herein, nerve stimulation may be used to uniquely stimulate neural tissue in way not afforded by other means of stimulation. It can allow basic scientists to study the properties of individual neurons or populations of neurons without piercing tissue with fragile microelectrodes. Furthermore, responses of neural tissue can be studied in a pure fashion without contamination by electrical artifact commonly seen with electrical stimulation. With respect to clinical uses, optical stimulation can be used to map function in subsections of peripheral nerves as an aid to operative repair. Finally, stimulation with optical energy does not require physical contact with the nerve which may be an advantage clinically when physical manipulation of neural tissue is not desired.

Abstract: The invention relates to a pigment dispersion which contains at least one polymer containing polyvinyl alcohol, polyvinyl ether an/or polyvinyl acetal units and at least one polymer based on acrylate, wherein the weight ratio is generally 1:10 to 10:1, preferably 4:1 to 1:4. This dispersion is used in positive- or negative-working and reversible photosensitive mixtures for the preparation of recording materials.

Abstract: In a method of producing a piston (10) for an internal combustion engine including at least one strengthened piston ring groove at least one relatively narrow groove (14) is configured in the region of the upper and/or lower flank of the provided piston ring groove (18) and the groove (14) is filled with a hard-wearing material (16) and the piston ring groove (18) is worked out such that the upper and/or lower flank is formed at least in part by the hard-wearing material (16).

Abstract: The invention relates to a method and a device for overvoltage protection in dual-voltage vehicle electrical systems (1) which have a different level of voltage. According to the invention, a switching element (S1, S2) is positioned in at least one branch of the vehicle electrical system on the higher voltage level and a voltmeter unit (3) is located in the vehicle electrical system on the lower voltage level, said switching element (S1, S2) being controlled by the voltmeter (3).

Abstract: In a method of producing a piston (10) for an internal combustion engine including at least one strengthened piston ring groove at least one relatively narrow groove (14) is configured in the region of the upper and/or lower flank of the provided piston ring groove (18) and the groove (14) is filled with a hard-wearing material (16) and the piston ring groove (18) is worked out such that the upper and/or lower flank is formed at least in part by the hard-wearing material (16).

Abstract: The present invention relates to a recording material having a substrate and a negative-working, radiation-sensitive layer which contains a diazonium salt, metal-free colored pigments dispersed in an organic polymeric binder, transparent spacer pigments having a pore volume of more than 1.0 ml/g and a polymeric binder. The predispersal of the colored pigments is achieved by milling with an organic polymeric binder containing hydroxyl groups, some or all of which have been reacted with a di- or polycarboxylic anhydride so that the binder has an acid number of from 20 to 200. Printing plates in which the printing parts have a clearly visible contrast relative to the substrate can be produced from the recording material.

Abstract: The invention relates to a developer for irradiated, radiation-sensitive recording materials, in particular for the production of offset printing plates, which contains water, a compound which is alkaline in aqueous solution and a copolymer which acts as an emulsifier and has units of (I) a hydrophobic vinyl compound which has at least one optionally substituted mono- or bicyclic (C.sub.6 -C.sub.14)aryl radical and (II) a hydrophilic, ethylenically unsaturated carboxylic acid. Some of the carboxyl groups of the copolymer are esterified with reaction products of (A) (C.sub.1 -C.sub.30)alkanols, (C.sub.8 -C.sub.25)alkanoic acids, (C.sub.1 -C.sub.12)-alkylphenols or di(C.sub.1 -C.sub.20)alkylamines with (B) (C.sub.2 -C.sub.4)-alkylene oxides or tetrahydrofuran, the molar ratio (A):(B) being in the range from 1:2 to 1:50. If it is intended to develop recording materials having a negative-working layer, the developer additionally contains a water-miscible organic solvent and a surface-active compound.

Abstract: A developer for irradiated, radiation-sensitive recording materials, in particular for the production of offset printing plates, which contains water, a compound which is alkaline in aqueous solution and a copolymer which acts as an emulsifier and has units of (I) a hydrophobic vinyl compound which has alkyl radicals having up to 30 carbon atoms and (II) a hydrophilic, ethylenically unsaturated carboxylic acid. Some of the carboxyl groups of the copolymer are esterified with reaction products of (A) (C.sub.1 -C.sub.30)alkanols, (C.sub.8 -C.sub.25)alkanoic acids, (C.sub.1 -C.sub.12)alkylphenols or di(C.sub.1 -C.sub.20)alkylamines with (B) (C.sub.2 -C.sub.4)alkylene oxides or tetrahydrofuran.

Abstract: A photosensitive mixture which contains a polycondensation product of an aromatic diazonium salt, a water-soluble amphophilic polymeric binder having a mean molecular weight M.sub.w of 5000 to 100,000 and a nonionic surface-active compound having a molecular weight of 150 to 2000 is suitable for the production of printing plates, particularly offset printing plates, which can be developed with pure water and are notable for a rapid ink take-up and long print run.

Abstract: A radiation-sensitive recording material comprising:a base;a radiation-sensitive layer comprising a diazonium salt polycondensation product and 3 to 50% by weight, relative to the total weight of the radiation-sensitive layer, of a mineral acid; anda silicone layer.

Abstract: A photosensitive recording material is described which has a layer base, a negative-working photosensitive layer containing a diazonium salt and a water-insoluble polymeric binder which is soluble or swellable in aqueous alkaline solutions, and a discontinuous top layer which forms a rough surface and which is composed of particles of a water-insoluble polymer which is dispersible in water in the presence of anionic or anionic/nonionic dispersants and which has a content of free acid groups or acid groups neutralized by salt formation of less than 0.8 mmol/g, the mean height of the particles being 2 to 6 .mu.m, the maximum height less than 10 .mu.m, the mean horizontal diameter less than 40 .mu.m, the maximum diameter less than 80 .mu.m and the number of particles being 100 to 10,000 per cm.sup.2. The material is suitable for the production of planographic printing plates and requires only short vacuum times in a vacuum-operated copying frame.

Abstract: A flow volumeter for liquids has an impeller chamber and an inflow chamber partially encircling the impeller chamber. In order to achieve a symmetrical load on the bearing for the impeller axis, the flow-directing openings in the circumferential wall of the impeller chamber, said openings facing the inflow openings of the inflow chamber, have smaller dimensions that the flow-directing openings facing away from the inflow chamber. In addition, the upper and lower regions of the impeller chamber are provided with outlet openings. Finally, the flow cross section of the inflow chamber decreases in size in the direction of flow.