有幾種方法可以用來控製麵包的老化,延長保質期限,這些方法的作用僅僅是延長麵包的保存期,防止過快地老化而已。
一、溫度的調整
熱及冷凍均可防止麵包產品的老化,延長銷售時間,對麵包產品持續加溫,使其保持在較高的溫度環境中如40~60℃或huo稍shao低di,對dui麵mian包bao保bao持chi較jiao長chang時shi間jian的de柔rou軟ruan作zuo用yong,尤you其qi在zai冬dong天tian氣qi溫wen低di的de情qing況kuang下xia,尤you其qi有you作zuo用yong。但dan由you於yu溫wen度du高gao又you易yi導dao致zhi發fa黴mei腐fu爛lan,同tong時shi失shi去qu部bu分fen水shui分fen與yu香xiang味wei。冷leng凍dong是shi一yi方fang法fa,但dan不bu同tong於yu冷leng藏zang,冷leng凍dong必bi須xu使shi溫wen度du降jiang低di到dao-20℃以下才能防止過快老,且降溫和解凍速度不能過於緩慢,此種方法耗能大,在目前的經驗條件下,是不大合算的。
二、包裝
lianghaodebaozhuangkeyifangzhishuifendesunshihebaochichanpindemeiguan,suiranbaozhuangbingbunengyizhihuaxuebianhuayinqidelaohua,danjiaomeiyoubaozhuangdemianbaonengbaochijiaochangjiuderouruanxinghexiangwei。yibanmianbaochanpinbaozhuangshiwenduwei37℃~40℃為宜,同時冷卻溫度不宜過快,以免防止麵包的龜裂,用電風扇直吹來達到散熱是不可取的,因為這樣會加速水分的蒸發。
三、麵粉的選擇
使shi用yong高gao筋jin麵mian粉fen製zhi作zuo的de麵mian包bao,吸xi水shui量liang多duo,而er且qie由you於yu蛋dan白bai質zhi含han量liang高gao,澱dian粉fen含han量liang少shao,麵mian包bao的de體ti積ji大da,所suo以yi麵mian包bao的de硬ying化hua較jiao慢man,保bao持chi性xing能neng良liang好hao。選xuan擇ze高gao筋jin度du的de麵mian粉fen製zhi作zuo麵mian包bao,一yi定ding要yao保bao證zheng水shui量liang充chong足zu,才cai有you助zhu於yu麵mian筋jin的de擴kuo展zhan,而er且qie要yao使shi用yong速su度du較jiao高gao的de攪jiao拌ban機ji,才cai能neng使shi麵mian筋jin得de到dao充chong分fen擴kuo展zhan。
四、麵包改良劑及α-澱粉酶的作用
一般麵粉中均缺乏澱粉液化酶α-dianfenmei,ermianbaogailiangjizhongdedianfenmeizaimiantuanfajiaojikaobeichuqinengshuijiebufendianfenweihujing,yincigaibiandianfendejiegou,jiangdidianfendetuihuazuoyong,zengchangmianbaodelaohuashijian。
五、乳化劑的作用
單甘脂是一種乳化劑,早在40nianqianyibeimianbaoguangfanshiyongyijianshaomianbaodeyinghuasudu,zengchangzhuzangshijian。ruhuajidezuoyongzhuyaobiaoxianzaiqishenrudianfenkelineiyuzhijiandianfenjieheerchengluoxuanzhuangzuzhi,yincizuzhishuifencongdianfenyichuerbaochileshuifen,tongshiyinweiruhuajidebiaomianzhanglidi,shentouyaqiang,jiangmiantuanneishiyongdeyouzhibeiruhuajisuoyongerkuodazhizuidamianji,yincizengjiamiantuanneimianjinjidianfenderunhuazuoyong,shimianjindewangzhuangjiegouzhuanbianweijiaoximidewangzhuangjiegou,shimianbaodezuzhixianximi;此ci乳ru化hua劑ji還hai可ke使shi澱dian粉fen不bu易yi拌ban入ru麵mian筋jin內nei,因yin此ci增zeng加jia麵mian筋jin的de彈dan性xing和he伸shen展zhan性xing,增zeng大da麵mian包bao體ti積ji,所suo以yi使shi用yong乳ru化hua劑ji是shi改gai善shan麵mian包bao品pin質zhi,增zeng加jia貯zhu藏zang時shi間jian為wei最zui有you效xiao、最簡單的辦法,一般使用量為0.5%。
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