Figure 1
Light microscope images of oxygen (O 2 ) bubbles generated by photosynthesis in Chlorella ( A-C ). D: Distribution of frequencies of volume occupied by each particle in photosynthetic solution before (black line) and at 5 (red), 10 (blue), and 20 (green) min after light-emitting diode illumination. The peak before illumination indicates Chlorella particles (black line).