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防止微生物侵袭,食用农产品需防腐保鲜

2017-08-19 06:21:44   新华网

食用农产品大多为生鲜食品,放置过久,产生异味和过氧化物,有致癌作用。食物未进行保鲜处理保存在冰箱中,仍会腐败变质,只是速度放慢而已。因此,食品为防止微生物的侵袭,必须进行防腐处理。

农产品的防腐保鲜是通过除菌、灭菌、防菌、抑菌不同的技术手段延长商品寿命、控制腐烂速度的过程。商品率越高,防腐保鲜技术运用越广,例如果蔬采收以后,虽然离开了植株或土壤,但仍然是有生命的活体,其最重要的特征是仍进行着旺盛的呼吸代谢,以维持其生命活动所需的能量和各种代谢需要的物质。果蔬贮藏保鲜就是通过控制贮藏环境条件,并利用各种辅助保鲜措施,尽量维持果蔬的“年轻”状态,延缓其成熟衰老。

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