真(zhen)(zhen)空包(bao)裝不能抑(yi)制(zhi)厭(yan)氧(yang)(yang)(yang)菌(jun)(jun)的(de)(de)繁(fan)殖(zhi)(zhi)和(he)酶反應引(yin)起的(de)(de)食(shi)(shi)品(pin)(pin)變(bian)(bian)質和(he)變(bian)(bian)色(se)(se),因(yin)此還需與其(qi)它輔助(zhu)方法(fa)結合(he),如冷藏、速凍、脫(tuo)水、高溫(wen)殺菌(jun)(jun)、輻照 滅菌(jun)(jun)、微波殺菌(jun)(jun)、鹽(yan)腌(a)制(zhi)等。真(zhen)(zhen)空除(chu)氧(yang)(yang)(yang)除(chu)了(le)抑(yi)制(zhi)微生(sheng)(sheng)物(wu)的(de)(de)生(sheng)(sheng)長和(he)繁(fan)殖(zhi)(zhi)外,另(ling)一(yi)個重要(yao)功能是防(fang)止(zhi)(zhi)食(shi)(shi)品(pin)(pin)氧(yang)(yang)(yang)化(hua),因(yin)油脂(zhi)(zhi)類食(shi)(shi)品(pin)(pin)中(zhong)含有(you)大量(liang)不飽和(he)脂(zhi)(zhi)肪酸,受氧(yang)(yang)(yang)的(de)(de)作用(yong)而氧(yang)(yang)(yang)化(hua),使(shi)食(shi)(shi)品(pin)(pin)變(bian)(bian)味、變(bian)(bian)質,此外,氧(yang)(yang)(yang)化(hua)還使(shi)維(wei)生(sheng)(sheng)素(su)A和(he)C損失(shi),食(shi)(shi)品(pin)(pin)色(se)(se)素(su)中(zhong)的(de)(de)不穩定(ding)物(wu)質受氧(yang)(yang)(yang)的(de)(de)作用(yong),使(shi)顏色(se)(se)變(bian)(bian)暗。所以(yi),除(chu)氧(yang)(yang)(yang)能有(you)效地防(fang)止(zhi)(zhi)食(shi)(shi)品(pin)(pin)變(bian)(bian)質,保持(chi)其(qi)色(se)(se)、香、味及營(ying)養價值。
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