●Beginning of time：Nov. 19, 2012
●End of time ：Nov. 29, 2012
●Placed：the meeting room in Korea.
●Temperature：18 ℃ -22 ℃
1.The experimental group (add SEPPA 30%) in producing wasn’t difference in the control group (the general PE bags) to change before 4 days of the period of the experimental.
2.The control group began to produce the situation of the corruption in the last stage of the period of the experimental.
3.The experimental group still let the lettuce keep fresh in certain extent after the end of the