1. In photoacoustic spectroscopy the need for sample treatment is minimal. 2. The laser does not clean by burning, but by photoacoustic stress waves. 3. The photoacoustic effect can be used to study solids, liquids and gases. 4. A special example is the application of the photoacoustic effect in photosynthesis research. 5. Photoacoustic tomography enables researchers to create three-dimensional images of deep tissue.6. Fig . 1 is a schematic illustration showing the basic principles of photoacoustic imaging. 7. Photoacoustic Doppler effect based imaging is a promising method for blood flow measurement in capillaries.8. Most generally, electromagnetic radiation of any kind can give rise to a photoacoustic effect. 9. This analysis includes also the possibility to determine the thermal properties from the photoacoustic signal. 10. Recently, the photoacoustic approach has been utilized to quantitatively measure macromolecules, such as proteins.
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