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Related Concept Videos

Microbial Biosensors01:17

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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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A miniaturized nanobiosensor for choline analysis.

Souvik Pal1, Manoj Kumar Sharma2, Bengt Danielsson3

  • 1Biosensor Lab., Department of Chemistry, BITS, Pilani -KK Birla Goa Campus, Goa 403726, India.

Biosensors & Bioelectronics
|December 12, 2013
PubMed
Summary
This summary is machine-generated.

A new reusable choline nanobiosensor uses zinc oxide nanorods for sensitive detection. This stable biosensor accurately measures choline in milk and maintains performance over 30 days.

Keywords:
ChemiluminescenceCholineMilkNanobiosensorPhosphonationZinc oxide nanorod

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Area of Science:

  • Nanomaterials Science
  • Biosensor Technology
  • Analytical Chemistry

Background:

  • Choline detection is crucial for various applications, including food safety and clinical diagnostics.
  • Existing choline biosensors often suffer from limited stability and reusability.
  • Development of robust and sensitive biosensing platforms is essential.

Purpose of the Study:

  • To develop a novel, reusable chemiluminescence choline nanobiosensor.
  • To utilize aligned zinc oxide nanorod-films (ZnONR) for enhanced biosensor performance.
  • To investigate the stability and accuracy of the developed biosensor.

Main Methods:

  • Synthesized aligned ZnONR using a hybrid wet chemical route on glass substrates.
  • Fabricated the biosensor by co-immobilizing choline oxidase and peroxidase onto ZnONR using 16-phosphonohexadecanoic acid.
  • Investigated the sensor's performance over a wide choline concentration range (0.0005–2 mM).

Main Results:

  • The developed ZnONR-based biosensor demonstrated high sensitivity and stability.
  • Covalent enzyme immobilization via phosphonation significantly enhanced enzyme stability (Km = 0.062 mM).
  • Achieved near 99% recovery of choline in milk samples and maintained performance for 30 days with 60 measurements (RSD < 3.51%).

Conclusions:

  • The novel reusable chemiluminescence choline nanobiosensor based on ZnONR offers excellent stability and sensitivity.
  • The covalent immobilization strategy ensures long-term sensor performance and reliability.
  • This nanobiosensor shows great potential for accurate choline determination in real-world samples like milk.