真空(kong)除氧(yang)(yang)(yang)除了抑制微生(sheng)物的(de)生(sheng)長和(he)繁殖外,另一(yi)個重要功能(neng)(neng)是防止(zhi)食(shi)(shi)品氧(yang)(yang)(yang)化(hua)(hua),因油(you)脂(zhi)類(lei)食(shi)(shi)品中(zhong)含有(you)大量(liang)不(bu)飽和(he)脂(zhi)肪酸,受(shou)氧(yang)(yang)(yang)的(de)作用(yong)而氧(yang)(yang)(yang)化(hua)(hua),使食(shi)(shi)品變(bian)味、變(bian)質(zhi)(zhi)(zhi)。此(ci)外,氧(yang)(yang)(yang)化(hua)(hua)還使維生(sheng)素A和(he)維生(sheng)素C損失,食(shi)(shi)品色(se)素中(zhong)的(de)不(bu)穩定物質(zhi)(zhi)(zhi) 受(shou)氧(yang)(yang)(yang)的(de)作用(yong),使顏色(se)變(bian)暗。所以,除氧(yang)(yang)(yang) 能(neng)(neng)有(you)效地(di)防止(zhi)食(shi)(shi)品變(bian)質(zhi)(zhi)(zhi),保持其色(se)、香、味及營(ying)養(yang)價(jia)值(zhi)。
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