1. The dark reaction take place in the stroma.

2. The main contents of experiment were as follows:Dark reaction and blank experiment made out, simple photocatalyst or simple illumination can neither proceed photocatalytic oxidation reaction.

3. TEGDMA was polymerized by UV radiation at different temperatures; polymerization conversion and dark reaction process were investigated by NIR spectroscopy.

4. Results indicated that, when the polymerization temperature is lower, the conversion is lower but the dark reaction process is more distinct.

5. The other 3-carbon molecules are used to rebuild 5-carbon compounds again through a series of complex chemical changes to continue the circulation of chemical reactions in dark reaction.