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Rennet coagulation of sheep milk processed by ultrafiltration at low concentration factors

机译:低浓度因子超滤处理羊乳的凝乳酶凝结

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摘要

The ultrafiltration (UF) of sheep milk is carried out in concentration mode in order to evaluate the variation of the rennet clotting properties of the concentrates as a function of the volumetric concentration factors up to a value of 2.0. The UF unit is equipped with 25.5 cm~2 of membrane surface area. The cellulose acetate laboratory - made membrane has a molecular weight cut-off of 7000 Da. The evolution pattern of the rennet clotting properties of the skimmed sheep milk feed and UF retentates was assessed by the Optigraph. A significant increase on curd firmness and rate of curd firming was detected with the increase of the protein concentration, while RCT show a tendency to increase with milk protein content. The variation of curd firmness and rate of curd firming with the protein concentration was linear and correlations were established.
机译:羊奶的超滤(UF)在浓缩模式下进行,以评估浓缩物的凝乳酶凝结特性随体积浓度因子(最大为2.0)的变化。超滤单元配备25.5 cm〜2的膜表面积。醋酸纤维素实验室制膜的截留分子量为7000 Da。通过Optigraph评估了脱脂羊奶饲料和超滤截留物凝乳酶凝结特性的演变模式。随着蛋白质浓度的增加,凝乳硬度和凝乳固化速率显着增加,而RCT显示随着牛奶蛋白质含量的增加而增加。凝乳硬度和凝乳速率随蛋白质浓度的变化呈线性关系,并建立了相关性。

著录项

  • 来源
    《Journal of food engineering》 |2013年第2期|249-254|共6页
  • 作者单位

    ICEMS, Institute Superior Tecnico, Universidade Tecnica de Lisboa, 1049-001 Lisboa, Portugal;

    UlTA-INRB IP., Campus do 1APMEI. Estrada do Pafo do Lumiar, 22, Ed. S, 1649-038 Lisboa, Portugal,Institute Superior de Agronomia, Tapada da Ajuda, 1349-017 Lisboa, Portugal;

    Institute Superior de Agronomia, Tapada da Ajuda, 1349-017 Lisboa, Portugal;

    ICEMS, Institute Superior Tecnico, Universidade Tecnica de Lisboa, 1049-001 Lisboa, Portugal,Departamento de Cientia e Tecnologia de Alimentos, Universidade Federal de Santa Catarina, Rod Admar Conzaga 1346, ltacorubi, 88034-001 Florianopolis, Brazil;

    ICEMS, Institute Superior Tecnico, Universidade Tecnica de Lisboa, 1049-001 Lisboa, Portugal;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    rennet clotting properties; ultrafiltration; sheep milk; curd firmness; rate of curd firming;

    机译:凝乳酶凝结特性;超滤羊奶凝乳坚硬凝乳固化率;

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