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相关概念视频

Testing Water Quality01:14

Testing Water Quality

103
When the quality of water for concrete preparation is uncertain, its impact on the setting time of cement and compressive strength of mortar is assessed by comparison with de-ionized or distilled water benchmarks. American Society for Testing and Materials (ASTM) C1602 requires the setting times to be within 90 minutes of the control, British Standard (BS) 3146:1980 allows a 30-minute variance in the initial setting, while British Standards European Norm (BS EN) 1008 specifies initial setting...
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Quality of Water01:19

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In concrete preparation, the quality of water is paramount as it affects the strength and durability of the concrete. Potable water is usually preferred; however, it must not have excessive sodium or potassium to prevent compromising the concrete's integrity. Water quality is typically evaluated based on impurities such as dissolved solids, chlorides, and sulfates, and its pH value is ideally between 6 and 8. Even slightly acidic natural water may be acceptable unless it contains harmful...
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酶活动 形状 造 质量标准 质量标准

Kangfeng Cai1, Xiaojian Wu1,2, Wenhao Yue1

  • 1Institute of Crop and Nuclear Technology Utilization Zhejiang Academy of Agricultural Sciences Hangzhou China.

Food science & nutrition
|January 13, 2025
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概括

酶活动显著影响大麦的酒质量. 阿尔法-氨酶,β-氨酶和β-葡萄糖酶水平与麦芽提取物和扩散力等关键特征相关,有助于大麦的繁殖.

关键词:
大麦大麦大麦大麦大麦大麦大麦大麦相关性 相关性 相关性酶活性的酶活动.基因表达的基因表达方式酒的质量是质量的.

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科学领域:

  • 农业科学 农业科学
  • 生物化学 生物化学
  • 植物遗传学 植物遗传学

背景情况:

  • 麦子的 Malting 质量是一个复杂的特征,受遗传和环境因素的影响.
  • 酵素活动对酒过程中的生物化学转化至关重要,影响可发酵糖和氨基酸的生产.

研究的目的:

  • 为了研究特定的酶活动和麦芽品种的麦芽质量特征之间的关系.
  • 识别关键的酶和基因与理想的酒特征相关.

主要方法:

  • 在14种麦芽大麦品种中分析酶活性 (α-氨酶,β-氨酶,β-葡萄糖酶).
  • 酶活动与酒质量参数 (酒提取物,粘度,自由α-氨基,科尔巴赫指数,扩散力) 之间的相关性分析.
  • 对关键酶 (HvAmy, HvBmy, HvGlb) 的基因表达分析.

主要成果:

  • α-氨酶活性与麦芽提取物,粘度,自由α-氨基和科尔巴赫指数有显著的相关性.
  • β-氨酶活性仅与透析功率有显著的相关性.
  • β-葡萄糖酶活性与自由α-氨基和科尔巴赫指数显著相关.
  • HvBmy1/HvBmy2的高表达与高透射功率相关; HvAmy1/HvAmy2和 HvGlb1/HvGlb2的激活对于高的自由α-氨基和科尔巴赫指数至关重要.

结论:

  • 酶活动,特别是α-氨酶,β-氨酶和β-葡萄糖酶,是大麦酒质量特征的强有力的指标.
  • 特定的基因表达 (HvAmy,HvBmy,HvGlb) 对于实现高扩散功率,自由α-氨基和科尔巴赫指数至关重要.
  • 了解这些酶-特征关系可以指导改良麦芽大麦品种的育种计划.