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Real-time In Vivo Recording of Arabidopsis Calcium Signals During Insect Feeding Using a Fluorescent Biosensor

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Fluorescent biosensor using whole cells in an inorganic translucent matrix.

Hanh Nguyen-Ngoc¹, Canh Tran-Minh

¹University of Technology HCM, 268 rue Ly Thuong Kiet, Ho Chi Minh, Vietnam.

Analytica Chimica Acta

|March 28, 2007

Summary

A new optical biosensor uses vegetal cells in a translucent matrix for herbicide detection. This reagentless method efficiently measures diuron activity using Chlorella vulgaris and fluorescence.

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Area of Science:

Biotechnology
Environmental Science
Analytical Chemistry

Background:

Optical biosensors offer sensitive detection methods for environmental contaminants.
Traditional biosensors can face limitations in signal detection efficiency.
Algal cells are effective biological components for detecting herbicides.

Purpose of the Study:

To develop a novel optical biosensor for herbicide detection.
To utilize vegetal cells immobilized in a translucent matrix for enhanced fluorescence detection.
To assess the long-term activity of the biosensor in determining diuron.

Main Methods:

Immobilization of Chlorella vulgaris in a translucent sol-gel matrix.
Development of an optical detection system using direct contact with optical fibers.

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Internalization and Observation of Fluorescent Biomolecules in Living Microorganisms via Electroporation

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Reagentless determination of diuron, an anti-photosystem II (anti-PSII) herbicide.

Main Results:

The translucent matrix enabled direct contact between the algal layer and optical fibers, improving fluorescence collection.
The biosensor demonstrated effective determination of diuron.
Long-term activity of the biosensor was successfully assessed.

Conclusions:

The developed optical biosensor offers an efficient and reagentless method for herbicide detection.
Sol-gel technology provides a suitable translucent matrix for algal immobilization in biosensors.
This approach enhances fluorescence detection and allows for long-term monitoring of herbicide activity.