青海大学学报(自然科学版)
青海大學學報(自然科學版)
청해대학학보(자연과학판)
JOURNAL OF QINGHAI UNIVERSITY (NATURAL SCIENCE EDITION)
2015年
1期
96-100
,共5页
牦牛乳%凝固型酸奶%扫描电镜%超微结构
牦牛乳%凝固型痠奶%掃描電鏡%超微結構
모우유%응고형산내%소묘전경%초미결구
yak milk%coagulated yogurt%SEM%ultrastructure
为了观察和分析凝固型牦牛乳酸奶的超微结构和测定其相关宏观物理性质,利用扫描电镜观察和分析了凝固型牦牛乳酸奶的超微结构,用表观粘度、持水力和脱水收缩作用的敏感性3种测定方法,与凝固型普通乳酸奶进行了对比。结果表明:凝固型牦牛乳酸奶的超微结构是一种纤维网状结构,该网状结构比凝固型普通乳酸奶更致密、宽厚且孔隙小,一般分布在2~13μm,酪蛋白支架间有丝状物相连接,并且凝固型牦牛乳酸奶的表观粘度、持水力和脱水收缩作用的敏感性大大优于凝固型普通乳酸奶,有利于酸奶保持更好品质。
為瞭觀察和分析凝固型牦牛乳痠奶的超微結構和測定其相關宏觀物理性質,利用掃描電鏡觀察和分析瞭凝固型牦牛乳痠奶的超微結構,用錶觀粘度、持水力和脫水收縮作用的敏感性3種測定方法,與凝固型普通乳痠奶進行瞭對比。結果錶明:凝固型牦牛乳痠奶的超微結構是一種纖維網狀結構,該網狀結構比凝固型普通乳痠奶更緻密、寬厚且孔隙小,一般分佈在2~13μm,酪蛋白支架間有絲狀物相連接,併且凝固型牦牛乳痠奶的錶觀粘度、持水力和脫水收縮作用的敏感性大大優于凝固型普通乳痠奶,有利于痠奶保持更好品質。
위료관찰화분석응고형모우유산내적초미결구화측정기상관굉관물이성질,이용소묘전경관찰화분석료응고형모우유산내적초미결구,용표관점도、지수력화탈수수축작용적민감성3충측정방법,여응고형보통유산내진행료대비。결과표명:응고형모우유산내적초미결구시일충섬유망상결구,해망상결구비응고형보통유산내경치밀、관후차공극소,일반분포재2~13μm,락단백지가간유사상물상련접,병차응고형모우유산내적표관점도、지수력화탈수수축작용적민감성대대우우응고형보통유산내,유리우산내보지경호품질。
In order to observe and analyze the ultrastructure of coagulated yak yogurt and to deter-mine its macroscopic physical properties .Scanning electron microscope ( SEM) was used to observed and analyze the ultrastructure .Apparent viscosity ,water holding capacity and suscepibility to synere-sis were measured .Compared with coagulated cow yogurt ,the ultrastructure of yak yogurt presented a fiber network structure and the net structure is denser ,heavier,with smaller pores than that of cow yogurt.The pores are between 2μm and13μm.Having the filaments connect between casein brack -et makes the apparent viscosity ,water holding capacity and suscepibility to syneresis of yak yogurt superior than that of cow yogurt ,chich helps yak yogurt in a good quality.