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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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Synthesis and Operation of Fluorescent-core Microcavities for Refractometric Sensing
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Absorbance and fluorometric sensing with capillary wells microplates.

Han Yen Tan1, Brandon Huey-Ping Cheong, Adrian Neild

  • 1Laboratory for Optics, Acoustics, and Mechanics, Department of Mechanical and Aerospace Engineering, Monash University, Clayton, Victoria 3800, Australia.

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Summary

This study presents an adapted capillary wells microplate design for accurate, non-imaging detection of fluorescence and absorbance assays. The system effectively identifies bubbles and pipetting errors, enhancing reliability in high throughput screening.

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Area of Science:

  • Analytical Chemistry
  • Biotechnology
  • Microfluidics

Background:

  • Accurate detection in small volume assays using microplates presents significant challenges.
  • Traditional methods are prone to errors from air-liquid interfaces and sample inconsistencies.
  • High throughput screening (HTS) demands robust and error-free assay readout.

Purpose of the Study:

  • To develop and validate an adapted capillary wells microplate design for non-imaging assay detection.
  • To overcome limitations associated with meniscus formation and sample volume variations.
  • To enhance accuracy and reliability in small volume assays, particularly for HTS.

Main Methods:

  • Utilized an adapted capillary wells microplate design for assay execution.
  • Employed non-imaging detection methods for fluorescence and absorbance measurements.
  • Integrated bubble and pipetting error detection capabilities within the assay workflow.

Main Results:

  • The adapted design successfully detects fluorescence and absorbance assays without meniscus-related errors.
  • Demonstrated effective detection of bubbles and pipetting errors during assay runs.
  • Achieved accurate assay readout, mitigating common sources of inaccuracy in microplate assays.

Conclusions:

  • The adapted capillary wells microplate offers a robust solution for accurate small volume assay detection.
  • This approach significantly improves data integrity and reliability in high throughput screening.
  • The system's ability to detect errors ensures trustworthy assay results.