Abstract:
La présente invention concerne un dispositif (1) de mesure de la capacité antioxydante/oxydante totale d'une matrice (2), comportant un boîtier rigide (3) sur lequel est fixé une pastille (4) comprenant au moins un système médiateur gélifié (5), apte à être mis en contact avec au moins une portion de la surface (20) de ladite matrice (2), et un moyen de mesure (6) de la capacité antioxydante/oxydante de ladite matrice (2), ledit dispositif (1) comportant également, reliée audit boîtier (3), une station de traitement des données récoltées par ledit moyen de mesure (6). Dans le présent dispositif (1), ledit moyen de mesure (6) de la capacité antioxydante/oxydante consiste en un moyen (7) de mesure du potentiel électrochimique du système médiateur (5), ce dernier incorporant au moins un premier composé (A) et un second composé (B) aptes à réagir et/ou à former un complexe respectivement avec les espèces antioxydantes (9) et oxydantes (10) présentes à la surface (20) de ladite matrice (2), en sorte de modifier le potentiel électrochimique dudit système médiateur (5). L'invention est également relative à un procédé de mesure de la capacité antioxydante totale d'une matrice (2).
Abstract:
The present disclosure provides improved sensor assemblies for gases. More particularly, the present disclosure provides for gas sensor assemblies operating at high temperature. Improved high temperature sensor assemblies for reducing gas are provided. In some embodiments, the present disclosure provides advantageous impedancemetric high temperature gas sensor assemblies based on electrospun nanofibers and having selectivity towards reducing gas, and related methods of use. In exemplary embodiments, the present disclosure provides for impedancemetric high temperature gas sensor assemblies having selectivity towards reducing gas. In certain embodiments, the sensor assembly includes electrospun nanofibers. Impedancemetric techniques have been employed at high operating frequency (e.g., 10 5 Hz) for the first time to provide real-time assemblies, methods and devices to sensitively and/or selectively detect reducing gas (e.g., CO, C 3 H 8 (propane), etc.) at high temperatures (e.g., at about 800°C).
Abstract:
An electrochemical sensor for the detection and analysis of an analyte in a solution is disclosed. The electrochemical sensor has an electrically non-conductive support; a plurality of electrodes on the support, each electrode formed from an electrode material and having a first surface and an opposite second surface, said first surface facing towards the support and the second surface facing away from the support. The plurality of electrodes includes a reference electrode, a counter electrode, and a working electrode. The working electrode has a reagent composition containing a reagent for detecting an analyte applied directly to the second surface of the working electrode, or dispersed throughout the electrode material of the working electrode.
Abstract:
Apparatus (2) for sensing at least one parameter in water, which apparatus (2) comprises: (i) at least one electrode based sensor (4, 6) for sensing at least one parameter in water; and which apparatus (2) is such that: (ii) the electrode based sensor (4, 6) has a self-cleaning electrode; (iii) the electrode based sensor (4, 6) has a reference electrode; (iv) the self-cleaning electrode is stable in water; (v) the apparatus (2) is configured to operate by liberating chlorine from the water using a first waveform applied to the self- cleaning electrode; (VI) the apparatus (2) is configured to operate by liberating chlorine and oxygen from the water using a second waveform applied to the self-cleaning electrode; and (VII) the apparatus (2) is configured to preserve the condition of the reference electrode by periodically regenerating the reference electrode.
Abstract:
The disclosure also relates to novel methods for detection of biological targets using amplification steps in conjunction with conversion of functional groups attached to a transitional metal complex, resulting in quantifiable electrochemical signal at two unique potentials, E°1 and E°2.
Abstract:
In some aspects, an analyte sensor (200) is provided for detecting an analyte concentration level in a biological fluid sample, such as glucose content in blood. The analyte sensor (200) has a base (222) including a top and bottom side, a lid (224), and an attachment member including one or more retention tabs (226A,226B) coupled proximate the top side so that the analyte sensor can be grasped by the grasping tabs (336A,336B) of an analyte meter (100). The analyte sensors (200) are stored in a dispenser (1400) in a stacked configuration with the retention tabs (226A,226B) facing up and the analyte meter (100) is inserted in the dispenser (1400) to retrieve a single analyte sensor (200). Manufacturing methods and systems adapted to use and dispense the analyte sensors are provided, as are numerous other aspects.
Abstract:
A polymer that combines high ionic conductivity with the structural properties required for Li electrode stability is useful as a solid phase electrolyte for high energy density, high cycle life batteries that do not suffer from failures due to side reactions and dendrite growth on the Li electrodes, and other potential applications. The polymer electrolyte includes a linear block copolymer having a conductive linear polymer block with a molecular weight of at least 5000 Daltons, a structural linear polymer block with an elastic modulus in excess of 1 x 10 7 Pa and an ionic conductivity of at least 1 x 10 -5 Scm -1 . The electrolyte is made under dry conditions to achieve the noted characteristics.
Abstract:
The invention relates to biophysics and to experimental and clinical medicine. In order to improve a quantitative and qualitative diagnosis of the functional state of a bioobject and to extend the functional capabilities, the inventive method for diagnosing the functional state of a bioobject consists in recording the pH values and Redox potential of the liquid media of said bioobject, plotting a DELTA pH/ DELTA Red graph which is based on the fluctuations of the variable values of the measurable parameters on the time diagram thereof, converting said graph into a column diagram, wherein the height of each column is proportional to the graph area between adjacent measurements, respectively and on the basis of the ratio between the total area of the positive columns and the total area of the negative columns during a fixed time interval which can be embodied in the form values ranging from minute to annual values, and in judging the state of the bioobject. The value situated within a range of 0.5-2.0 is considered as a normal value, the greater that the absolute value of the total area of the positive columns and the total area of the negative columns is, the greater the degree of stability of a homeostasis.
Abstract:
Die Erfindung betrifft ein Verfahren zum Regeln der Dosierung von Reaktionskomponenten bei einer kontinuierlichen Azokupplungsreaktion, dadurch gekennzeichnet, dass das Redoxpotential des Reaktionsgemisches im Hauptstrom nach dessen Austritt aus einem kontinuierlich betriebenen Reaktor in einer Durchflussmessezelle mit Hilfe einer quer zur Fliessrichtung des Reaktionsgemisches angeordneten rotierenden Redoxelektrode online gemessen wird. Die Erfindung betrifft weiterhin eine Durchflussmesszelle zur Duchführung des Verfahrens, gekennzeichnet durch eine rotierende Redoxelektrode (1), die etwa in der Mitte des Strömungsrohres (2) der Durchflussmesszelle quer zur Strömungsrichtung des Reaktionsgemisches angeordnet und in einem Schleifkontakt (3) zur Signalabnahme drehbar gelagert ist; einen die rotierende Redoxelektrode berührenden stabförmigen Körper (4) mit einer reinigenden Wirkung; eine Referenzelektrode (5); und eine pH-Elektrode (6).