皮蛋和變蛋的區別
1、性質不同:變(bian)蛋(dan)、皮(pi)蛋(dan)一般都是松花蛋(dan),這是加(jia)工(gong)制作過(guo)程中加(jia)入石(shi)灰石(shi)等強堿物質(zhi)導(dao)致凝固(gu)的蛋(dan)白出(chu)現松花狀的圖案。
2、用料:變蛋(dan)使用塊石(shi)灰,堿,谷糠(kang)或鋸沫等。皮蛋(dan)用料(liao)為氧化鉛及輔料(liao)等。
3、顏色:變蛋透(tou)明金黃,有雪花斑(ban)點。皮蛋顏色(se)為發黑不透(tou)明,有松花斑(ban)點。
4、味道:變蛋(dan)味(wei)(wei)道(dao)香,皮(pi)蛋(dan)味(wei)(wei)道(dao)含(han)鉛,有(you)點發臭(硫化氫)。
皮蛋和松花蛋的區別
沒有(you)區(qu)別,皮(pi)蛋(dan)(dan)(dan)就是(shi)(shi)(shi)松(song)(song)(song)花(hua)(hua)(hua)蛋(dan)(dan)(dan),她們(men)是(shi)(shi)(shi)同一個東西,叫(jiao)法不同而(er)(er)已(yi)(yi)。專(zhuan)業的說(shuo),皮(pi)蛋(dan)(dan)(dan)又叫(jiao)變(bian)蛋(dan)(dan)(dan)、松(song)(song)(song)花(hua)(hua)(hua)蛋(dan)(dan)(dan),和咸蛋(dan)(dan)(dan)、糟蛋(dan)(dan)(dan)同屬于腌制蛋(dan)(dan)(dan)。只(zhi)(zhi)是(shi)(shi)(shi)皮(pi)蛋(dan)(dan)(dan)打(da)開表(biao)面有(you)松(song)(song)(song)花(hua)(hua)(hua)狀的花(hua)(hua)(hua)紋,所以稱(cheng)松(song)(song)(song)花(hua)(hua)(hua)蛋(dan)(dan)(dan)。但是(shi)(shi)(shi),有(you)的皮(pi)蛋(dan)(dan)(dan)表(biao)面則沒有(you)形成(cheng)(cheng)松(song)(song)(song)花(hua)(hua)(hua)狀的花(hua)(hua)(hua)紋,但這兩者并沒有(you)本質區(qu)別,只(zhi)(zhi)是(shi)(shi)(shi)人們(men)習(xi)慣(guan)把表(biao)面形成(cheng)(cheng)松(song)(song)(song)花(hua)(hua)(hua)的稱(cheng)為(wei)松(song)(song)(song)花(hua)(hua)(hua)蛋(dan)(dan)(dan)而(er)(er)已(yi)(yi)。而(er)(er)且,市面上賣(mai)的也(ye)多是(shi)(shi)(shi)有(you)松(song)(song)(song)花(hua)(hua)(hua)的松(song)(song)(song)花(hua)(hua)(hua)蛋(dan)(dan)(dan),因為(wei)口感更好。
皮蛋形成松花的原因
皮蛋(dan)形成(cheng)(cheng)松花是(shi)經過一(yi)場化學反(fan)應的(de)(de)(de):蛋(dan)白(bai)(bai)的(de)(de)(de)主要化學成(cheng)(cheng)分是(shi)一(yi)種蛋(dan)白(bai)(bai)質。禽蛋(dan)放置的(de)(de)(de)時(shi)間(jian)一(yi)長(chang),蛋(dan)白(bai)(bai)中的(de)(de)(de)部分蛋(dan)白(bai)(bai)質會分解成(cheng)(cheng)氨(an)基酸。他的(de)(de)(de)化學結構有一(yi)個(ge)堿性(xing)的(de)(de)(de)氨(an)基-NH2和一(yi)個(ge)酸性(xing)的(de)(de)(de)羧基-COOH,因此它既能(neng)跟酸性(xing)物質作用(yong)又能(neng)跟堿性(xing)物質作用(yong)。
所以,人們(men)在制造松(song)花(hua)蛋設(she)計,特意在泥巴里加入了一(yi)些堿性的(de)(de)物質,如石灰、碳酸鉀、碳酸鈉等。它(ta)們(men)會穿過蛋殼上的(de)(de)細孔,與氨基(ji)酸化合,生成氨基(ji)酸鹽(yan)。這(zhe)些氨基(ji)酸鹽(yan)不溶于(yu)蛋白,于(yu)是(shi)就以一(yi)定幾何形狀結晶出(chu)來,形成了漂亮的(de)(de)松(song)花(hua)。漂亮的(de)(de)松(song)花(hua),正是(shi)這(zhe)些氨基(ji)酸鹽(yan)的(de)(de)結晶體(ti)。這(zhe)也就是(shi)為什(shen)么我們(men)吃皮(pi)蛋的(de)(de)時候覺得氣味很(hen)沖的(de)(de)原因,因為里面有堿,而過于(yu)沖鼻的(de)(de)話可能堿大(da)了哦。