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相关概念视频

Design Example: Distributing Reinforcements in Concrete Sections01:22

Design Example: Distributing Reinforcements in Concrete Sections

79
The topic explores the practical aspects of adjusting steel reinforcements within a concrete beam section to meet specific design requirements. When designing a reinforced concrete beam, it is essential to distribute the steel reinforcements properly to ensure structural integrity and efficiency. The example provided details a scenario where a beam requires a total steel cross-section of 4 square inches. The engineer identifies that the available steel bars have a nominal diameter of 1.693...
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相关实验视频

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Iterative Development of an Innovative Smartphone-Based Dietary Assessment Tool: Traqq
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定义为消费者指导所建议的份量大小的方法.

Alison L Eldridge1,2, Evangelia Kotzakioulafi3, Charlotte Debras3

  • 1Nestlé Institute of Health Sciences, Nestlé Research, Vers-chez-les-Blanc, Lausanne, Switzerland. alison.eldridge@rdls.nestle.com.

European journal of nutrition
|January 3, 2025
PubMed
概括

这项研究为50个食品组制定了全球一致的份量大小建议. 该方法确保为消费者提供明确的指导,以便在适当的食物份额方面做出明智的饮食选择.

关键词:
基于食物的饮食指南包装食品 包装食品 包装食品份量建议 份量建议份量大小 份量大小

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科学领域:

  • 营养科学 营养科学
  • 公共卫生 公共卫生
  • 粮食政策 粮食政策

背景情况:

  • 包装食品上的强制性营养信息在全球范围内缺乏标准化的份量.
  • 不一致的份量大小阻碍了消费者做出明智的饮食选择的能力.
  • 需要一个统一的方法来制定全球份量大小建议.

研究的目的:

  • 开发一种方法来建立全球一致的份量大小建议.
  • 为营养密度高和可自由选择的食物组创建建议.
  • 为了解决全球范围内服务大小缺乏监管的问题.

主要方法:

  • 采用了一种逐步系统的方法,整合了份量规定的数据,基于食物的饮食指南 (FBDG) 和食物摄入数据.
  • 全球份量值 (GPV) 通过计算所有输入数据的中位数来计算50个食品组.
  • 使用百分位数和分散度量 (绝对偏差的中位数) 评估了GPV的一致性.

主要成果:

  • 在9个类别的50个食品组计算了GPV,包括乳制品,蛋白质,谷物,水果/蔬菜和零食.
  • 部分值的数据输入范围从6到18,88%的GPV显示一致性 (分散率<25%).
  • 具体的GPV的例子包括牛奶240mL,肉菜90g和巧克力30g,显示出高的一致性.

结论:

  • 一个标准化的方法为部分建议已经成功开发.
  • 这些全球一致的份量建议可以使消费者能够做出明智的食物选择.
  • 通过这些建议,可以通过促进适当的消费水平来改善公共卫生结果.