Related Experiment Video
Updated: May 4, 2026
12:31
A Method for Selecting Structure-switching Aptamers Applied to a Colorimetric Gold Nanoparticle Assay
Published on: February 28, 2015
17.1K
A fluorescence-based microbial sensor for the selective detection of gold.
Hsueh-Wei Tseng1, Yi-Jung Tsai, Jia-Ho Yen
1Department of Chemistry, National Taiwan Normal University, 88, Section 4, Tingzhou Road, Taipei 11677, Taiwan. yichuny@ntnu.edu.tw.
Chemical Communications (Cambridge, England)
|January 8, 2014
Summary
This study introduces a new fluorescence-based microbial sensor for detecting metal ions, specifically gold. Engineered bacteria like Cupriavidus metallidurans and Ralstonia eutropha show high specificity, offering a robust analytical tool for environmental monitoring.
Area of Science:
- Environmental science and analytical chemistry
- Microbiology and biosensor development
Background:
- Traditional methods for metal ion detection can be complex and costly.
- There is a need for sensitive and selective analytical tools for environmental monitoring.
- Microbial sensors offer a promising alternative for detecting environmental contaminants.
Purpose of the Study:
- To develop and validate a fluorescence-based microbial sensor for detecting metal ions.
- To assess the specificity and effectiveness of whole-cell biosensors for gold ion detection.
- To explore the potential of engineered microbial strains as analytical tools in environmental applications.
Main Methods:
- Utilized whole-cell microbial biosensors based on heavy-metal-tolerant proteobacteria (Cupriavidus metallidurans and Ralstonia eutropha).
- Employed fluorescence-based detection for quantifying metal ion presence.
- Evaluated sensor performance for selective detection of gold ions.
Main Results:
- Demonstrated the effectiveness of the fluorescence-based microbial sensor for detecting metal ions.
- Achieved selective detection of gold ions with high specificity using the chosen bacterial strains.
- Confirmed the robustness of engineered microbial strains as analytical tools.
Conclusions:
- The developed fluorescence-based microbial sensor is a novel and effective analytical tool for environmental applications.
- Engineered microbial strains, specifically Cupriavidus metallidurans and Ralstonia eutropha, exhibit high specificity for gold ion detection.
- This approach highlights the significant potential of microbial biosensors for robust environmental monitoring.
Related Concept Videos
01:17Microbial Biosensors
88
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...
88
01:20Immunogold Electron Microscopy
4.9K
Immunoelectron microscopy utilizes immunogold labeling of endogenous proteins with specific antibodies to detect and localize these proteins in cells and tissues. The procedure provides insights into the distribution and quantification of protein under different stimulation conditions offering clues about their functions. Conjugating highly electron-dense gold particles with primary or secondary antibodies allow antigen detection on and within cells, with high resolution and specificity.
4.9K