【正文】 ? Source of growth factors and modulators 生長和調(diào)節(jié)代謝因子的來源 ? Other proteins with important biological properties其他具有重要生物學(xué)特性的蛋白質(zhì) : ? Lactoferrin, lactoperoxidase, lysozyme casein glyacropeptide, phosphopeptides, and fat globule membrane proteins 乳鐵蛋白 ,乳過氧化物酶 ,溶菌酶 ,酪蛋白糖聚肽 ,磷化肽 ,脂肪球膜蛋白 . Classification of Dried Whey 乳清粉的分類 ? Edible grade whey 食品級 – low bacterial count 微生物計數(shù)少 ? Feed grade whey 飼料級 – does not make edible grade沒有達(dá)到食品要求的 ? Sweet whey 甜乳清粉 – from cheddar cheese 源于切達(dá)乳酪的乳清液 ? Acid whey 酸乳清粉 – from cottage cheese production 源于酪農(nóng)干酪的乳清液 ? Regular whey 一般乳清粉 ? Delactosed whey 脫乳糖乳清粉 ? Spray dried whey 噴霧干乳清粉 ? Roller dried whey 滾筒干乳清粉 Drying Systems 干燥方法 Spray dried whey 噴霧干燥 ? Whey is atomized into superheated ? High initial temperature, low final temperature. 高初始溫度 ,低結(jié)束溫度 ? Predominance of ?lactose. 以 ?乳糖為主 ? Results in a finer product that tends to be more 易吸水 Roller dried whey 滾筒干燥 ? Whey is picked up by heated rollers or ? Scraped from rollers by the knife ? Low initial temperature, high final temperature. 低初始溫度 ,高結(jié)束溫度 ? Predominance of ?lactose (sweeter). 以 ?型乳糖為主 . ? Results in a granular product that is less ,不易吸水 Indices of Overall Quality of Dried Whey 乳清粉質(zhì)量評價 ? Color 色澤 ? Spraydried whey frequently bleached white (food applications). 噴霧干乳清粉通常在漂白后干燥 (食品使用 ) ? Rollerdried whey has no bleaching agents – more cream 筒干乳清粉不添加漂白粉 , 顏色為乳黃色 . ? Dark or yellowish spraydried whey may indicate overheating or long storage 貯所致 . ? Overheating or long storage periods can result in the Maillard ? Epsilon amino group of lysine binds to carbohydrate賴氨酸的 ? 氨基團(tuán)與碳水化合物結(jié)合 ? Bound lysine is not absorbed – unavailable. 結(jié)合的賴氨酸不能被吸收 Indices of Overall Quality of Dried Whey 乳清粉質(zhì)量評價 ? Ash content 灰分含量 ? Low ash content is ? High ash may indicate that the whey became acidic and sodium hydroxide was added before drying to raise the 清液變酸 ,干燥前添加氫氧化鈉提高 pH值 ? High ash generally means high salt content – this can cause diarrhea in . 高鹽分會引起豬下痢 ? High ash content may also indicate that a flow agent was added to enhance flowability of the final product. 另外 , 高灰分可能是為改進(jìn)產(chǎn)品的流動性添加的流動劑所致 Composition of Dried Whey 乳清粉的營養(yǎng)成分 Dried Whey 乳清粉 Dry matter,干物質(zhì) % 96 Lactose, 乳糖 % 68 Crude protein, 粗蛋白 % Crude fat, 粗脂肪 % Lysine, 賴氨酸 % Digestible lysine,可消化賴氨酸 % Ca, 鈣 % P, 磷 % P availability, 磷的利用率 % 100 NaCl, 氯化鈉 % ME, Mcal/kg 代謝能 Milk 鮮奶 Cheese 乳酪 Liquid W hey 液體乳清 Lactose 乳糖 Partially Delactosed Permeate 部分脫乳糖透析液 Whey Protein Conc. 乳清濃縮蛋白 Permeate 透析液體 Drying 干燥 Ultrafiltration 超過濾 Whey Processing 乳清粉加工過程 Dried Permeate (Dairylac 80) Dried Whey 乳清粉 Composition of Dried Whey Products 乳清粉產(chǎn)品營養(yǎng)成分 Whole Whey Dry matter, 干物質(zhì) % 96 Lactose, 乳糖 % 68 Crude protein,粗蛋白 % Crude fat, 粗脂肪 % Lysine, 賴氨酸 % Digestible lysine,可消化賴氨酸 % Ca, 鈣 % P, 磷 % P availability, 磷利用率 % 100 NaCl, 氯化鈉 % ME, Mcal/kg 代謝能 Composition of Dried Whey Products 乳清粉產(chǎn)品營養(yǎng)成分 Whole Delactosed Whey Whey Dry matter,干物質(zhì) % 96 96 Lactose, 乳糖 % 68 54 Crude protein,粗蛋白 % Crude fat, 粗脂肪 % Lysine, 賴氨酸 % Digestible lysine,可消化賴氨酸 % Ca, 鈣 % P, 磷 % P availability, 有效磷 % 100 100 NaCl, % ME, Mcal/kg Composition of Dried Whey Products 乳清粉產(chǎn)品的營養(yǎng)成分 Whole Delactosed Whey Whey Whey Permeate Dry matter, 干物質(zhì) % 96 96 96 Lactose, 乳糖 % 68 54 80 Crude protein,粗蛋白 % Crude fat, 粗脂肪 % Lysine, 賴氨酸 % Digestible lysine, 可消化賴氨酸 % Ca, 鈣 % P, 磷 % P availability,有效磷 % 100 100 100 NaCl, 氯化鈉 % ME, Mcal/kg, 代謝能 Nutritional Value of Dried Whey, Dried Whey Permeate, and Lactose 乳清粉 ,低蛋白乳清粉 ,乳糖的營養(yǎng)價值 Dried Whey in Pig Starter Diets 斷奶仔豬料中乳清粉的使用 ? Excellent ingredient 極好的原料 ? Palatable 適口性好 ? High in lactose 乳糖含量高 ? Best carbohydrate source for young pigs 幼齡豬最理想的碳水化合物來源 ? Excellent source of protein 極好的蛋白質(zhì)來源 ? Highly digestible 易消化 ? Excellent profile of amino acids 理想的氨基酸組成 ? Functional proteins – immunoglobulins, etc. 功能性蛋白質(zhì) ,免疫球蛋白 One of the First Studies with Dried Whey in Diets for You