真空包裝不(bu)能(neng)(neng)抑(yi)制厭氧(yang)(yang)(yang)菌的(de)(de)繁殖(zhi)和(he)(he)酶反應引起的(de)(de)食(shi)(shi)(shi)品(pin)(pin)變(bian)(bian)(bian)質和(he)(he)變(bian)(bian)(bian)色(se),因(yin)此還(huan)需與(yu)其(qi)它輔助方(fang)法結(jie)合,如(ru)冷藏、速凍、脫水(shui)、高(gao)溫(wen)殺菌、輻照 滅菌、微(wei)(wei)波殺菌、鹽(yan)腌制等(deng)。真空除氧(yang)(yang)(yang)除了抑(yi)制微(wei)(wei)生(sheng)物的(de)(de)生(sheng)長和(he)(he)繁殖(zhi)外(wai),另一個重要功能(neng)(neng)是防(fang)(fang)止(zhi)(zhi)食(shi)(shi)(shi)品(pin)(pin)氧(yang)(yang)(yang)化,因(yin)油脂類食(shi)(shi)(shi)品(pin)(pin)中含有大(da)量不(bu)飽和(he)(he)脂肪酸,受氧(yang)(yang)(yang)的(de)(de)作用而(er)氧(yang)(yang)(yang)化,使(shi)食(shi)(shi)(shi)品(pin)(pin)變(bian)(bian)(bian)味、變(bian)(bian)(bian)質,此外(wai),氧(yang)(yang)(yang)化還(huan)使(shi)維生(sheng)素(su)(su)A和(he)(he)C損(sun)失,食(shi)(shi)(shi)品(pin)(pin)色(se)素(su)(su)中的(de)(de)不(bu)穩(wen)定物質受氧(yang)(yang)(yang)的(de)(de)作用,使(shi)顏色(se)變(bian)(bian)(bian)暗。所(suo)以,除氧(yang)(yang)(yang)能(neng)(neng)有效地(di)防(fang)(fang)止(zhi)(zhi)食(shi)(shi)(shi)品(pin)(pin)變(bian)(bian)(bian)質,保持其(qi)色(se)、香、味及營養(yang)價值。
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