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相关概念视频

Protein Denaturation01:28

Protein Denaturation

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The function of proteins depends on their native three-dimensional structure, which is dictated by the amino acid sequence of the specific protein. Folding of the polypeptide chain takes place under specific conditions that energetically favor the folded conformation. In contrast, protein denaturation occurs spontaneously under unfavorable conditions that disrupt the integrity of the folded conformation. Thus, the chemical and physical environment of a protein, such as significant changes in pH...
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Cell membranes are composed of phospholipids, proteins, and carbohydrates loosely attached to one another through chemical interactions. Molecules are generally able to move about in the plane of the membrane, giving the membrane its flexible nature called fluidity. Two other features of the membrane contribute to membrane fluidity: the chemical structure of the phospholipids and the presence of cholesterol in the membrane.
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Novel Production Protocol for Small-scale Manufacture of Probiotic Fermented Foods
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在低温和脂度下,牛奶蛋白功能上的变化.

Mahmoud E A Hamouda1, Prafulla Salunke1

  • 1Dairy and Food Science Department, Midwest Dairy Foods and Research Center, South Dakota State University, Brookings, SD 57007, USA.

Foods (Basel, Switzerland)
|February 10, 2024
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概括

低度的干会改变脱脂牛奶蛋白的功能,影响发泡和乳化特性,而不会形成乳酪. 这表明了新的牛奶加工应用的潜力.

科学领域:

  • 食品科学 食品科学 食品科学
  • 乳制品化学 乳制品化学
  • 蛋白质化学 蛋白质化学

背景情况:

  • 了解皮脂对脱脂牛奶 (SM) 蛋白质功能的影响,对于乳制品加工至关重要.
  • 对于特定的应用,研究低度在低温 (4±1°C) 的影响是关键.
  • 之前的研究可能没有完全探索SM属性的微妙变化没有聚合.

研究的目的:

  • 为了评估低度水对脱脂牛奶的化学,质和蛋白质特性的影响.
  • 为了评估功能性质的变化,如在受控化下发泡和乳化.
  • 为了确定是否可以改变牛奶蛋白的功能,而不会诱导乳酪的形成.

主要方法:

  • 脱脂牛奶经过不同低度的 (0.0010.1毫升) 处理,并在24小时内化.
  • 分析包括近距离组合,毛细管凝电泳 (CGE),水力动力直径,泽塔潜力和风湿学.
  • 测量了功能性质,例如发泡能力,稳定性,保持水分的能力和乳化活性.

主要成果:

  • 添加毛皮会增加非蛋白质和非素含量,而不会形成聚合物.
  • CGE显示卡帕-素 (κ-CN) 降低随着皮毛水平的增加,同时增加了水力动力直径和降低了泽塔潜力.
  • 发泡能力和稳定性下降,而油乳化活性和乳液稳定性随着度和时间的增加而增加.
关键词:
低温低温的低温是一个问题.牛奶蛋白的功能的功能.一个叫做Rennet的人.脱脂牛奶 脱脂牛奶是一种

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结论:

  • 低度的液可以改变脱脂牛奶蛋白的功能,包括乳化和发泡特性,而无需聚合.
  • 蛋白质结构的变化 (例如 κ-CN 分解) 与功能特征的改变相关.
  • 这些发现表明,改脱脂牛奶对于特定的食品应用的加工有潜力.