真空(kong)除(chu)氧(yang)(yang)除(chu)了抑制微生(sheng)物的生(sheng)長和(he)繁殖外，另(ling)一個重要功能是防(fang)止(zhi)食(shi)(shi)(shi)(shi)品氧(yang)(yang)化(hua)，因油(you)脂(zhi)類(lei)食(shi)(shi)(shi)(shi)品中含有(you)大(da)量(liang)不(bu)飽(bao)和(he)脂(zhi)肪酸，受氧(yang)(yang)的作用而氧(yang)(yang)化(hua)，使(shi)(shi)食(shi)(shi)(shi)(shi)品變(bian)(bian)味、變(bian)(bian)質(zhi)(zhi)。此外，氧(yang)(yang)化(hua)還使(shi)(shi)維(wei)生(sheng)素(su)A和(he)維(wei)生(sheng)素(su)C損失，食(shi)(shi)(shi)(shi)品色(se)素(su)中的不(bu)穩定物質(zhi)(zhi) 受氧(yang)(yang)的作用，使(shi)(shi)顏(yan)色(se)變(bian)(bian)暗(an)。所以，除(chu)氧(yang)(yang) 能有(you)效(xiao)地防(fang)止(zhi)食(shi)(shi)(shi)(shi)品變(bian)(bian)質(zhi)(zhi)，保持其色(se)、香、味及(ji)營養價(jia)值。