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Related Concept Videos

Imaging Biological Samples with Optical Microscopy01:18

Imaging Biological Samples with Optical Microscopy

Optical microscopy uses optic principles to provide detailed images of samples. Antonie van Leeuwenhoek designed the first compound optical microscope in the 17th century to visualize blood cells, bacteria, and yeast cells. In 1830, Joseph Jackson Lister created an essentially modern light microscope. The 20th century saw the development of microscopes with enhanced magnification and resolution.
In optical microscopy, the specimen to be viewed is placed on a glass slide and clipped on the stage...

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Related Experiment Video

Updated: May 13, 2026

Luminescence Lifetime Imaging of O2 with a Frequency-Domain-Based Camera System
08:35

Luminescence Lifetime Imaging of O2 with a Frequency-Domain-Based Camera System

Published on: December 16, 2019

Microfluidic oxygen imaging using integrated optical sensor layers and a color camera.

Birgit Ungerböck1, Verena Charwat, Peter Ertl

  • 1Applied Sensors, Institute of Analytical Chemistry and Food Chemistry, Graz University of Technology, Stremayrgasse 9/3, 8010 Graz, Austria.

Lab on a Chip
|February 28, 2013
PubMed
Summary
This summary is machine-generated.

This study introduces a high-resolution oxygen imaging method for microfluidic systems. The technique offers accurate, real-time 2D oxygen mapping, advancing cell-based assays and biological research.

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Area of Science:

  • Biomedical Engineering
  • Analytical Chemistry
  • Cell Biology

Background:

  • Studying oxygen distribution in microfluidic environments is crucial for understanding cellular respiration and various biological processes.
  • Existing oxygen imaging methods often lack the resolution or accuracy required for detailed microfluidic analysis.

Purpose of the Study:

  • To develop and validate a high-resolution, real-time 2D oxygen imaging approach for microfluidic applications.
  • To enable precise measurement of oxygen concentration and respiratory activity in cellular microenvironments.

Main Methods:

  • Fabrication of microfluidic chips with integrated luminescent sensing films.
  • Development of a referenced oxygen imaging setup using a color CCD-camera and light harvesting principles.
  • Utilizing platinum(ii)-5,10,15,20-tetrakis-(2,3,4,5,6-pentafluorphenyl)-porphyrin (PtTFPP) for oxygen-sensitive detection and a reference dye.

Main Results:

  • Achieved high-resolution, real-time 2D oxygen imaging with superior quality compared to intensity imaging.
  • Demonstrated accurate measurement of respiratory activity in human cell cultures (HeLa and fibroblasts) within a microfluidic system.
  • Validated the ratiometric imaging approach using red and green channels of the CCD-camera.

Conclusions:

  • The developed oxygen imaging setup provides accurate spatial and temporal resolution of oxygen concentration in microfluidic channels.
  • This method supports parallelized oxygen measurements and opens possibilities for novel cell-based assays.
  • The technology is applicable to diverse fields including tissue engineering, tumor biology, and hypoxia research.