乳糖為白色的結(jié)晶性顆粒或粉末；無臭，味微甜。 本品在水中易溶，在乙醇、氯仿或乙醚中不溶。乳糖作用 1.發(fā)酵乳必不可少，提供碳源。乳糖在乳酸菌的作用下，分解成半乳糖和葡萄糖。 2.為人類提供營養(yǎng)、提供能源。半乳糖對哺乳動物有重要影響。乳糖有利于鈣的吸收。乳糖酶缺少會引起乳糖不耐癥。 3. 對乳制品組織狀態(tài)有重要影響。煉乳生產(chǎn)，乳糖結(jié)晶對煉乳口感的影響。奶粉的溶解性。 4. 對乳制品的顏色、風(fēng)味有重要影響。褐變反應(yīng)。發(fā)酵后風(fēng)味形成。
im
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portant; float: none; word-spacing: 0px; font: 14px/25px arial, 宋體, sans-serif; text-transform: none; color: rgb(0,0,0); text-indent: 0px; white-space: normal; letter-spacing: normal; background-color: rgb(255,255,255); orphans: 2; widows: 2; webkit-text-size-adjust: auto; webkit-text-stroke-width: 0px">糖是二糖的一種，是在哺乳動物im
portant; float: none; word-spacing: 0px; font: 14px/25px arial, 宋體, sans-serif; text-transform: none; color: rgb(0,0,0); text-indent: 0px; white-space: normal; letter-spacing: normal; background-color: rgb(255,255,255); orphans: 2; widows: 2; webkit-text-size-adjust: auto; webkit-text-stroke-width: 0px">乳汁中的雙糖，因此而得名。它的分子結(jié)構(gòu)im
portant; float: none; word-spacing: 0px; font: 14px/25px arial, 宋體, sans-serif; text-transform: none; color: rgb(0,0,0); text-indent: 0px; white-space: normal; letter-spacing: normal; background-color: rgb(255,255,255); orphans: 2; widows: 2; webkit-text-size-adjust: auto; webkit-text-stroke-width: 0px">是由一分子葡萄糖和一分子半乳糖縮合形成。味微甜，牛乳im
portant; float: none; word-spacing: 0px; font: 14px/25px arial, 宋體, sans-serif; text-transform: none; color: rgb(0,0,0); text-indent: 0px; white-space: normal; letter-spacing: normal; background-color: rgb(255,255,255); orphans: 2; widows: 2; webkit-text-size-adjust: auto; webkit-text-stroke-width: 0px">中約含乳糖4%，人奶中含5%到7%。工業(yè)中從乳清im
portant; float: none; word-spacing: 0px; font: 14px/25px arial, 宋體, sans-serif; text-transform: none; color: rgb(0,0,0); text-indent: 0px; white-space: normal; letter-spacing: normal; background-color: rgb(255,255,255); orphans: 2; widows: 2; webkit-text-size-adjust: auto; webkit-text-stroke-width: 0px">中提取，用于制造嬰兒im
portant; float: none; word-spacing: 0px; font: 14px/25px arial, 宋體, sans-serif; text-transform: none; color: rgb(0,0,0); text-indent: 0px; white-space: normal; letter-spacing: normal; background-color: rgb(255,255,255); orphans: 2; widows: 2; webkit-text-size-adjust: auto; webkit-text-stroke-width: 0px">食品、糖果、人造牛奶等。醫(yī)學(xué)上常用作矯味劑。
im
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portant; float: none; word-spacing: 0px; font: 14px/25px arial, 宋體, sans-serif; text-transform: none; color: rgb(0,0,0); text-indent: 0px; white-space: normal; letter-spacing: normal; background-color: rgb(255,255,255); orphans: 2; widows: 2; webkit-text-size-adjust: auto; webkit-text-stroke-width: 0px"> im
portant; float: none; word-spacing: 0px; font: 14px/25px arial, 宋體, sans-serif; text-transform: none; color: rgb(0,0,0); text-indent: 0px; white-space: normal; letter-spacing: normal; background-color: rgb(255,255,255); orphans: 2; widows: 2; webkit-text-size-adjust: auto; webkit-text-stroke-width: 0px">乳糖性狀im
portant; float: none; word-spacing: 0px; font: 14px/25px arial, 宋體, sans-serif; text-transform: none; color: rgb(0,0,0); text-indent: 0px; white-space: normal; letter-spacing: normal; background-color: rgb(255,255,255); orphans: 2; widows: 2; webkit-text-size-adjust: auto; webkit-text-stroke-width: 0px">im
portant; float: none; word-spacing: 0px; font: 14px/24px arial, 宋體, sans-serif; text-transform: none; color: rgb(0,0,0); text-indent: 0px; white-space: normal; letter-spacing: normal; background-color: rgb(255,255,255); orphans: 2; widows: 2; webkit-text-size-adjust: auto; webkit-text-stroke-width: 0px"> 本品為白色的結(jié)晶性顆粒或粉末；無臭，味微甜。 im
portant; float: none; word-spacing: 0px; font: 14px/24px arial, 宋體, sans-serif; text-transform: none; color: rgb(0,0,0); text-indent: 0px; white-space: normal; letter-spacing: normal; background-color: rgb(255,255,255); orphans: 2; widows: 2; webkit-text-size-adjust: auto; webkit-text-stroke-width: 0px"> 本品在水中易溶，在乙醇im
portant; float: none; word-spacing: 0px; font: 14px/24px arial, 宋體, sans-serif; text-transform: none; color: rgb(0,0,0); text-indent: 0px; white-space: normal; letter-spacing: normal; background-color: rgb(255,255,255); orphans: 2; widows: 2; webkit-text-size-adjust: auto; webkit-text-stroke-width: 0px">、氯仿或乙醚im
portant; float: none; word-spacing: 0px; font: 14px/24px arial, 宋體, sans-serif; text-transform: none; color: rgb(0,0,0); text-indent: 0px; white-space: normal; letter-spacing: normal; background-color: rgb(255,255,255); orphans: 2; widows: 2; webkit-text-size-adjust: auto; webkit-text-stroke-width: 0px">中不溶。 im
portant; float: none; word-spacing: 0px; font: 14px/24px arial, 宋體, sans-serif; text-transform: none; color: rgb(0,0,0); text-indent: 0px; white-space: normal; letter-spacing: normal; background-color: rgb(255,255,255); orphans: 2; widows: 2; webkit-text-size-adjust: auto; webkit-text-stroke-width: 0px"> 比旋度 取本品，在80℃干燥2 小時后，精密稱定，加水溶解并定量稀釋制成每1 im
portant; float: none; word-spacing: 0px; font: 14px/24px arial, 宋體, sans-serif; text-transform: none; color: rgb(0,0,0); text-indent: 0px; white-space: normal; letter-spacing: normal; background-color: rgb(255,255,255); orphans: 2; widows: 2; webkit-text-size-adjust: auto; webkit-text-stroke-width: 0px"> ml中含本品0.10g 與氨試液0.02ml的溶液，依法測定（附錄Ⅵ E），比旋度為+52.0° im
portant; float: none; word-spacing: 0px; font: 14px/24px arial, 宋體, sans-serif; text-transform: none; color: rgb(0,0,0); text-indent: 0px; white-space: normal; letter-spacing: normal; background-color: rgb(255,255,255); orphans: 2; widows: 2; webkit-text-size-adjust: auto; webkit-text-stroke-width: 0px"> 至+52.6°。
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