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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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Multimodal Optical Imaging Platform for Studying Cellular Metabolism
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Optical second harmonic generation in biological systems.

S Fine, W P Hansen

    Applied Optics
    |January 30, 2010
    PubMed
    Summary
    This summary is machine-generated.

    A Q-switched ruby laser generated a 347 nm emission from collagenous tissues. This narrow band emission, potentially from optical second harmonic generation, was also observed in reduced crystalline glutathione.

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    Area of Science:

    • Biophysics
    • Laser Physics
    • Biomaterials Science

    Background:

    • Q-switched ruby lasers are utilized in various scientific applications.
    • Collagenous tissues possess unique optical properties.
    • Understanding laser-tissue interactions is crucial for biomedical applications.

    Purpose of the Study:

    • To investigate the emission characteristics of biological tissues when irradiated with a Q-switched ruby laser.
    • To identify the mechanism behind the observed narrow band emission at 347 nm.
    • To explore the potential role of glutathione in this phenomenon.

    Main Methods:

    • Irradiation of excised biological tissues using a Q-switched ruby laser at 694 nm.
    • Spectroscopic analysis to detect and characterize emission lines.
    • Comparison of emission from collagenous tissues with reduced crystalline glutathione.

    Main Results:

    • An isolated narrow band emission line was observed at 347 nm from collagenous tissues.
    • The temporal pulses at 347 nm were narrower than the laser pulses at 694 nm.
    • Similar narrow band emission at 347 nm was observed for reduced crystalline glutathione.

    Conclusions:

    • The observed narrow band emission at 347 nm is attributed to optical second harmonic generation.
    • Collagenous tissues exhibit unique nonlinear optical properties.
    • Reduced crystalline glutathione may be involved in the 347 nm emission mechanism.