volatile compound
5.The volatile chemical composition of Elshoitzia rugiosa Haimsi, the herbal of Bai nationality, has been Studied. Through GC-MS analysis, 34 kinds of compositions such as elsholtziaketone, 3-methyl butylic acid and eugenol and so on have been checked, and 21 kinds of structure of chemical compound have been assayed, which has provided theoretical basis for developing and making use of this national herbal.
6.The polystyrene froth board other name forth board,the EPS board are by includes the volatile liquid foaming agent to be possible the sending polystyrene,after heats up sends the white which heats up in the mold takes shape enable it in advance to have the tiny structure especially，mainly to use in to construct the wall,the house surface heat preservation,the compound board heat preservation,the cold storage,air conditioning,the vehicles,the ships heat preservation heat insulation,the floor heats,use and so on decoration carving is extremely widespread.
