真空(kong)除氧(yang)(yang)(yang)除了抑(yi)制(zhi)微(wei)生(sheng)物(wu)(wu)的生(sheng)長和繁(fan)殖外,另一個重要功(gong)能是防(fang)止食(shi)(shi)品氧(yang)(yang)(yang)化,因油脂(zhi)類食(shi)(shi)品中含(han)有(you)大量不(bu)飽和脂(zhi)肪酸,受氧(yang)(yang)(yang)的作(zuo)用而氧(yang)(yang)(yang)化,使(shi)食(shi)(shi)品變(bian)(bian)味、變(bian)(bian)質。此(ci)外,氧(yang)(yang)(yang)化還使(shi)維生(sheng)素(su)(su)A和維生(sheng)素(su)(su)C損失,食(shi)(shi)品色(se)素(su)(su)中的不(bu)穩(wen)定物(wu)(wu)質 受氧(yang)(yang)(yang)的作(zuo)用,使(shi)顏(yan)色(se)變(bian)(bian)暗。所以,除氧(yang)(yang)(yang) 能有(you)效地(di)防(fang)止食(shi)(shi)品變(bian)(bian)質,保(bao)持其(qi)色(se)、香、味及營養(yang)價值。
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