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Sciospec

Sciospec

Sciospec - Electrical Impedance. At its best.

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Sciospec Scientific Instruments GmbH
Leipziger Straße 43b, 04828 Bennewitz, Germany

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Portfolio tags: EIS

Miniaturisierte Wundsensoren basierend auf der Detektion von extrazellulärem Chromatin

Tuesday, 11 January 2022 by Paul Luutz

Sensoren zur Überwachung von Wundinfektionen sind wichtig, um das Pflegemanagement insbesondere bei chronischen Wunden zu verbessern. Als Nachweisparameter wurde die Bildung von extrazellulärem Chromatin gewählt, das aufgrund seiner gebundenen negativen Ladungen charakteristische dielektrische Eigenschaften in ionischen Lösungsmitteln besitzt. Experimente mit planaren Elektroden führten zu einer hohen Impedanzerhöhung von fast 450%. Die Analyse der relativen Permittivität ergab eine Grenzfrequenz bei 5 kHz. Es wird erstmals gezeigt, dass die sich ändernden Eigenschaften des elektrischen Mediums während der Bildung von Neutrophilen Extrazellulären Fallen (NET) für die auftretende Ausbreitung relevant sind. Um die Anforderungen an Miniaturisierung und Biokompatibilität zu erfüllen, wird ein textiler Sensoraufbau vorgeschlagen. Mit diesen experimentellen Ergebnissen ist es möglich, einen faserbasierten Sensor basierend auf einem Impedanzdetektionsprinzip zu entwickeln.

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Measuring the viscosity of glycerin solutions in very small samples using Sciospec ISX-3 Impedance Analyzer

Tuesday, 27 July 2021 by Paul Luutz

Measuring the viscosity of very small sample volumes is of high interest in many fields especially in miniaturized and micro-fluidic systems. This application note describes an approach using the change of the impedance spectrum of a Thickness Shear Mode Resonator in combination with a sophisticated fitting algorithm. The simple setup of the measuring system enables easy integration in existing micro-fluidic settings with almost no adaption. As validation of the Sciospec ISX-3 a comparison to theoretical values and to a commercially available vector network analyzer on the same setup is provided.

The measurement of the viscosity is very well known for sample volumes larger than a couple milliliters. The standard viscometers use either rotating parts, a flow through, a capillary system or falling spheres. This application note describes an example of measuring smaller sample volumes with no need for mechanical parts.

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512 channel system for in-depth insights into complex cell electrophysiology

Thursday, 20 May 2021 by Paul Luutz
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Infection Monitoring in Wounds

Thursday, 09 July 2020 by Paul Luutz

Wound infection monitoring is a challenging task. It is only solvable by designing an integrable and cost-efficient sensor which measures a relevant set of parameters. One viable parameter is the formation of neutrophil extracellular traps (NETs). Their task is trapping pathogens in the wound. A wound infection results in massive release of them which can be detected with impedimetric methods. Our investigations focused on the characterization of the biological process with an in vitro model. The model environment is a cell culture with neutrophil granulocytes cultured on interdigitated electrodes which represent the sensor surface. Detected impedance changes caused by NET-formation were in the range of 35% and even higher. This implies that impedance measurements are suitable for NET detection. We derived a measurement and evaluated it by differing conditions like changing stimulation agent and varying the cell number. For both conditions the results of impedance and phase angle deviation can be confirmed. In combination with other parameters a sensor can be designed for specific detection of wound infections. These aspects are integrated in our sensor concept.

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Phenocor

Friday, 24 April 2020 by Paul Luutz

The joint research project PhenoCor deals with the development of a medical diagnostic device (Clinical Multi Electrode Array, cMEA) for a better and more precise in-vitro stratifization, model-based therapy planning and clinical safety pharmacology for patients suffering from a genetically caused heart disease.

Our partners of the University of Leipzig and the University Clinic in Dresden are focusing on the assay and experimental design Sciospec`s role is to develop and build a massiv-multichannel system combining electro-physiological potential recording (EPR), electrical impedance spectroscopy (EIS), electrical impedance tomography (EIT) and complex stimulation within the same system. The system allows for fully simultaneous acquisition of impedance or potential signals on up to 512 electrodes in combination with up to 4 independent complex stimulation injections. This opens up new possibilities for monitoring highly dynamic and spatially distributed electro-physiological phenomena and allows in-depth insights into complex cell interactions. An application-specific sensor adapter brings together the measurement system and the newly designed high density sensor array with an innovative contacting scheme.

Find out more about the PCOR system.

 

PhenoCor is supported by the Free State of Saxony and the European Union (SMWA/EFRE).
Project number: 100387683

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