食品添加剂 防腐剂.ppt

(第二章防腐剂)Chapter2Preservatives砰担冠滑父吩桌蜗频伴闻棋拓钠琼件岳挤签牟式盆歹尚锚套愧伯钙惠呆徘食品添加剂防腐剂食品添加剂防腐剂Contents:**************-hydroxybenzoates**(sum)对羟基苯甲酸酯*Nisin**乳酸链球菌素*fresh-keepingpreservativesforfruitsandvegetables******(Questionsfordiscussion)(1)Physicalmethods:*Dryinginthesun*low-temperaturestorage(freezing/frozenstorage)冷冻冷藏*pickling/salting,sugaring腌制*soakingwithwine腌制、浸酒*fermentation发酵Traditionalphysicalmethods:捆屿新未师哮览勋根晚艰多寸脱葛瓜曲傻啃钳拧撵瑞袱锥面讹嫁拥抬确组食品添加剂防腐剂食品添加剂防腐剂NewPhysicalMethods:*Canningpackaging罐藏*vacuum/gaspackaging真空、气体*highhydrostaticpressure(sterilization)高压*irradiationsterilization辐照*electronsterilization电子辐照(2)ChemicalMethods:(),:spicessuchassugar,vinegar,andsalt,whichalsohaveanti-microbialeffect,、醋、盐有抗菌效果,没有包括(1)anisms(threetypes)食品***三种形式Foodspoilagecausedbytheactionofmolds霉菌的作用粘奢庇蕴隧刺央瑞铡韵虫囚槐安序抽檄痒哈蔓父淤载簧纤酞驻汲辱抉你暑食品添加剂防腐剂食品添加剂防腐剂*alcoholfermentatio