More and more attention is being paid to their functions in anti-cancer, analgesia, regulating cholesterol level in the human body,preventing atheroma,deinsectization and other aspects.
In the geological condition of shallow buried, soft rock, and carst, et al. the mother rock of these kinds of tunnel must be paid attention in the whole construction stage.
The pollution and harm caused by dioxine had been paid attention in all over the world.And the bleaching process in pulp and paper making industry is also a source of dioxine.