真空除氧(yang)除了抑制微生(sheng)物的(de)生(sheng)長和(he)繁殖(zhi)外,另一個(ge)重要功(gong)能是防止(zhi)食(shi)(shi)(shi)品氧(yang)化(hua)(hua)(hua),因油脂類食(shi)(shi)(shi)品中(zhong)含有大量不(bu)飽(bao)和(he)脂肪酸(suan),受(shou)氧(yang)的(de)作(zuo)用而(er)氧(yang)化(hua)(hua)(hua),使食(shi)(shi)(shi)品變(bian)(bian)(bian)味(wei)、變(bian)(bian)(bian)質(zhi)。此外,氧(yang)化(hua)(hua)(hua)還使維(wei)(wei)生(sheng)素A和(he)維(wei)(wei)生(sheng)素C損(sun)失,食(shi)(shi)(shi)品色素中(zhong)的(de)不(bu)穩(wen)定物質(zhi) 受(shou)氧(yang)的(de)作(zuo)用,使顏色變(bian)(bian)(bian)暗。所以,除氧(yang) 能有效地防止(zhi)食(shi)(shi)(shi)品變(bian)(bian)(bian)質(zhi),保持其(qi)色、香、味(wei)及營養(yang)價值。
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