Abstract:
A method for determining the concentration of sugar in the presence of interfering foreign substances, particularly for determining glucose in a body fluid, by means of an electrocatalytic sugar sensor which has a measuring electrode in which the measuring electrode is alternatingly set potentiostatically to a reactivation and a measuring potential and the current flowing during the measuring period is evaluated as the measurement signal. To prevent foreign substances from exerting an interfering influence and thereby permit a sensitive sugar determination which is reliable over an extended period of time, a hydrophilic diaphragm is arranged in front of the measuring electrode to impede the resupply of the interfering foreign substances to the measuring electrode so that a diffusion limit current adjusts itself during the reactivation phase in the oxidation of the foreign substances; and the current is evaluated with a time delay relative to the start of the measuring period.
Abstract:
A method for determining the concentration of sugar in the presence of interfering foreign substances, by means of a test electrode with a membrane placed in front of it, the electrode being contained in an electrocatalytic sugar sensor, whereby the test electrode is set potentiostatically to a reactivation potential and to a test potential and the current flowing during the set test period is evaluated as a test signal. The invention formulates a method such that with varying concentrations of urea a sensitive determination of sugar concentration which is reliable over a long term is achieved. The invention discloses the method which includes the step that after the reactivation potential and prior to the test potential a third potential that is more negative than the test potential is applied to the test electrode. The technique proposed in the invention is particularly appropriate for the determination of the concentration of glucose in body fluids.
Abstract:
The invention relates to an implantable dosing device for the continuous, controllable release of medication in the human or animal body, comprising a medicine reservoir of variable volume and a liquid chamber which is tensionally connected to the medicine reservoir and the volume of which can be varied by liquid which is transported through an ion exchange diaphragm by electro-osmosis due to an electric field between two electrodes. According to the invention, the electrodes in such an implantable dosing device are hydrogen electrodes which are connected to each other by a line for hydrogen, and means are further provided for compensating hydrogen losses.
Abstract:
A method for the manufacture of electrodes for electrochemical cells, is provided in which a Raney rare-metal catalytic layer is disposed on a metallic support structure in layer form. According to the invention, the Raney rare-metal catalytic layer is prepared by dissolving the inactive component of a layer, disposed on the support structure, of a homogeneous alloy of at least one of the metals of the platinum group of the periodic system of the elements as the active component and at least one of the metals of the iron group of the periodic system of the elements as the inactive component; the content of inactive component being at least 65 atom-percent.
Abstract:
Solid electrolyte capacitors are produced in such a way that a formed metallic anode body which has pores passing through it is arranged on a working electrode, and a conductive polymer is deposited in the pores of the anode body by electochemical polymerization of a monomer in the liquid phase, in the presence of a conducting salt. The polymer is provided with a contact point.
Abstract:
The invention discloses an apparatus for maximizing the uniformity of distribution of gasification medium in a rotary grid generator. To insure proper input, a distribution head is rotatably mounted within the interior of the rotary grid, and the distribution head is connected by means of elastic input conduits to either openings which are directly connected with the reactor chamber, or to distribution chambers in the individual segments of the rotary grid. Through use of the apparatus, the formation of canals through preferential gas flow in the solid beds of pressure gas generators is eliminated.
Abstract:
A machine for the continuous processing of hides and skins comprising a first and a second processing unit mounted on a frame. The first unit includes rollers, a hide gripping arrangement, and means for driving same; the second unit being similarly equipped; the second unit being capable of processing that portion of the hide not processed by the first unit. The second unit grips the hide before processing by the first unit is commenced.
Abstract:
The apparatus for burning the contaminated soot particles in the exhaust gases of diesel motors of vehicles comprising in the exhaust gas line a housing with a burner operated with a fuel/air mixture for burning the contaminated particles in the exhaust gas flow. The housing comprises a rotatably supported hollow cylinder through which the exhaust gases flow. The housing and the hollow cylinder bound the combustion space of the burner, wherein the hollow cylinder comprises drive vanes and the exhaust gases of the diesel motor and/or the exhaust gases of the burner act upon the drive vanes and wherein the exhaust gases of the burner heat the hollow cylinder up to the combustion temperature of the soot particles. The arrangement can be also made in such a way, that the exhaust gases and/or the combustion gases of the burner flow through bores into the perforated hollow cylinder and exit through the one open end face of the perforated hollow cylinder.
Abstract:
Apparatus and process for the manufacturing of microcrystalline metallic materials in band form, wherein the chemical compositing for the cooling roller given in ranges within which the upper surface roughness is reduced, the geometry is improved, the presence of microcracks is eliminated or reduced and the ductibility of the band is increased.
Abstract:
An improved heart pacemaker of the type which includes a stimulating electrode and a counter electrode, a pulse generator and which has an implantable glucose/oxygen biofuel cell as an energy supply, in which pacemaker the area of the glucose electrode of the biofuel cell is made larger than that of the stimulating electrode and the stimulating electrode is in electrically conductive connection with the glucose electrode and thus at the same potential.