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Microbial Biosensors01:17

Microbial Biosensors

Microbial biosensors are analytical devices that utilize living microbes to detect specific substances through measurable signals. These devices consist of two main components: biosensing organisms and signal-transducing elements. Biosensing organisms, such as Escherichia coli or Saccharomyces cerevisiae, are typically housed in multiwell plates connected to transducers, enabling rapid, real-time detection of target analytes.Signal Generation MechanismWhen a target analyte—such as...

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A Biodegradable Bioactive Glass-Based Hydration Sensor for Biomedical Applications.

Amina Gharbi1,2, Ahmed Yahia Kallel3, Olfa Kanoun3

  • 1CEM Lab, National Engineering School of Sfax, Sfax University, Sfax 3018, Tunisia.

Micromachines
|January 21, 2023
PubMed
Summary
This summary is machine-generated.

Researchers developed a novel biodegradable bioactive glass sensor to monitor brain edema. This hydration-sensitive material offers a safer alternative to traditional sensors for detecting intracranial pressure changes after trauma or surgery.

Keywords:
bioactive glassbiodegradablebrain edemacapacitive sensorhydration monitoring

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Area of Science:

  • Biomaterials Science
  • Medical Device Engineering
  • Neuroscience

Background:

  • Intracranial pressure monitoring is crucial for managing brain trauma and post-surgical complications.
  • Current implantable sensors pose risks due to the need for surgical removal.
  • Biodegradable sensors offer a safer alternative for continuous monitoring.

Purpose of the Study:

  • To develop and characterize a novel biodegradable bioactive glass (BaG)-based hydration sensor.
  • To evaluate the sensor's sensitivity to hydration and dehydration for potential use in monitoring brain edema.
  • To assess the suitability of fluorine-containing BaG (BaG-F) for detecting changes in intracranial pressure.

Main Methods:

  • Bioactive glass (BaG) matrix was produced with varying concentrations of CaF2 (5, 10, 20 wt.%) using a melting technique.
  • Structural, morphological, and electrical properties of the synthesized BaG-F materials were analyzed.
  • The sensor's electrical sensitivity (resistive-capacitive) to hydration and dehydration cycles was demonstrated.

Main Results:

  • The BaG-F structure was found to be amorphous and dense, with decreased porosity and increased grain size correlating with higher CaF2 content.
  • The BaG-F material exhibited high sensitivity to hydration, with electrical properties changing reversibly upon hydration and dehydration.
  • The synthesis process was validated through structural and electrical property assessments.

Conclusions:

  • The developed BaG-F material is a promising candidate for a biodegradable hydration sensor.
  • Its sensitivity to hydration makes it suitable for monitoring brain edema and detecting increased intracranial pressure.
  • This technology could lead to improved patient outcomes by enabling safer, continuous monitoring.