Effects of dry fog humidification on pericarp browning and quality of litchi fruit stored at low temperature

Pericarp browning is the major cause of deterioration of harvested litchi fruit.Water loss plays a role in pericarp browning of litchi fruit.This study investigated the effects of humidification with dry fog on pericarp browning and quality of litchi fruit stored at low temperature.Litchi fruit were stored in a non-humidified cold chamber(control)or in a humidified cold room using Tabor atomizer system that generated 95%relative humidity(RH)without depositing water on the fruit surface at 4℃.Control fruit stored in cold room without added humidity underwent rapid weight loss,accompanied by severe pericarp browning after 25 d of storage.However,slight weight loss and no obvious pericarp browning were found in humidified-fruit.Moreover,humidification maintained well the integrity of cell membrane and inhibited polyphenol oxidase activity during early storage.In addition,respiration rate was obviously inhibited in humidified-fruit compared with control fruit.This study might provide a convenient approach to reduce pericarp browning of harvested litchi fruit by humidifying the fruit using the Tabor atomizer at low temperature instead of packaging with film.

散货码头皮带机系统布袋除尘与干雾抑尘的应用比较

简要介绍目前国内主要散货码头皮带机除尘系统的应用情况,分析布袋除尘和干雾抑尘系统的工作原理、技术特点和适用范围等的区别,分别针对采用布袋除尘和干雾抑尘的皮带机系统的典型工况,以及除尘系统的设备配置、装机容量和工程投资等进行技术经济比较,可供同类散货码头皮带机除尘系统的设计和施工参考。