1. Assessment of the acidogenic and cariogenic erosive potential of foods requires the use of reproducible and standardised methods.

2. For the purpose of enhancing the operation stability of ethanol type fermentation in acidogenic phase, batch anaerobic culture is employed to research the fermentation types in acidogenic phase.

3. Continuous - flow experiment and batch test were conducted to investigate the ecological law of acidogenic bacteria and sulfate - reducing bacteria based on substrate utilization.

4. Keep the habit of brushing teeth every morning and night, especially at night, in order to avoid remained food's acidogenic fermentation formed by bacteria at night to erode surface of teeth.

5. The varieties of VFA along the reactor makes it clear that the acidogenic and methanogenic are separated in the ABR.

6. ORP, as the non-biological factors to the operation of the acidogenic phase, can affect strongly on the fermentation types of acidogenic phase.

7. The niche of SRB is a key factor in the sulfate wastewater treatment in acidogenic - desulfate reactor.

8. The cariogenic ability of cariogenic bacteria is related not only with coherence, and acidogenic ability, but also closely with acid resistance.