The quality of kiwifruit with three different packaging films were studied on the storage days. These kiwifruits were stored at 0±0.5°Cfor 120 days. Results showed that the kiwifruits with PVC films can keep a relative good quality during the storage life.
The structure model of silicon nanograins was built. And then based the modification of the mean free path of phonons according to the size of nanograins, the expression of thermal conductivity in nanograins was obtained according to the phonon kinetic theory. The dependence of the thermal conductivity of silicon nanograins on size was investigated. The results showed that thermal conductivity of nanograins decrease with the reduction of characteristic sizes when the characteristic sizes of nanograins are comparable to or smaller than the phonon mean free path.
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