Figure 1. Physical model of leaf lettuce

From

Theoretical Simulation and Experimental Study on Effect of Vacuum Pre-Cooling for Postharvest Leaf Lettuce

Enhai Liu, Xiaobo Hu, Shengyong Liu

Journal of Food and Nutrition Research. 2014, 2(8), 443-449 doi:10.12691/jfnr-2-8-3