真空充(chong)氣(qi)(qi)(qi)(qi)(qi)包(bao)裝在真空后再(zai)充(chong)入氮氣(qi)(qi)(qi)(qi)(qi)、二氧(yang)化碳(tan)、氧(yang)氣(qi)(qi)(qi)(qi)(qi)單一(yi)氣(qi)(qi)(qi)(qi)(qi)體(ti)(ti)或(huo)二 三種(zhong)氣(qi)(qi)(qi)(qi)(qi)體(ti)(ti)的混合氣(qi)(qi)(qi)(qi)(qi)體(ti)(ti)。其(qi)(qi)氮氣(qi)(qi)(qi)(qi)(qi)是惰性(xing)氣(qi)(qi)(qi)(qi)(qi)體(ti)(ti),起(qi)充(chong)填(tian)作用,使(shi)袋內保持(chi)正壓 ,以防止袋外空氣(qi)(qi)(qi)(qi)(qi)進入袋內,對食(shi)品起(qi)到一(yi)個保護作用。其(qi)(qi)二氧(yang)化碳(tan)能(neng)夠(gou)溶于各(ge)類(lei)脂肪或(huo)水(shui),引(yin)成酸性(xing)較(jiao)弱的碳(tan)酸,有抑制霉菌(jun)、腐敗細(xi)菌(jun)等微生物(wu)的活性(xing)。其(qi)(qi)氧(yang)氣(qi)(qi)(qi)(qi)(qi)具有抑制厭氧(yang)菌(jun)的生長繁殖,保持(chi)水(shui)果(guo)、蔬菜的新(xin)(xin)鮮(xian)(xian)及色彩,高(gao)濃度氧(yang)氣(qi)(qi)(qi)(qi)(qi)可使(shi)新(xin)(xin)鮮(xian)(xian)肉類(lei)保持(chi)其(qi)(qi)鮮(xian)(xian)紅色。水(shui)果(guo)蔬菜的新(xin)(xin)鮮(xian)(xian)可是營(ying)養不流失(shi)。
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