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相关概念视频

Adaptations that Reduce Water Loss01:57

Adaptations that Reduce Water Loss

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Though evaporation from plant leaves drives transpiration, it also results in loss of water. Because water is critical for photosynthetic reactions and other cellular processes, evolutionary pressures on plants in different environments have driven the acquisition of adaptations that reduce water loss.
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Regulation of Water Output01:26

Regulation of Water Output

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The human body predominantly expels water through the urinary system. On average, an individual generates around 1.5 liters of urine each day. This amount can fluctuate based on how well a person is hydrated, but a critical minimum quantity of urine must be produced to ensure the body's proper functioning. Daily, the kidneys remove 600 to 1200 milliosmoles of dissolved substances, effectively excreting excess minerals and water-soluble toxins such as creatinine, urea, and uric acid from the...
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Refrigerators and Heat Pumps01:07

Refrigerators and Heat Pumps

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Refrigerators or heat pumps are heat engines operating in a reverse direction. For a refrigerator, the focus is on removing heat from a specific area, whereas, for a heat pump, the focus is on dumping heat into one particular area. A refrigerator (or heat pump) absorbs heat Qc from the cold reservoir at Kelvin temperature Tc and discards heat Qh to the hot reservoir at Kelvin temperature Th, while work W is done on the engine’s working substance.
A household refrigerator removes heat from...
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Regulation of Water Intake01:25

Regulation of Water Intake

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Osmolality refers to the number of solute particles per kilogram of solvent in a solution. Plasma osmolality specifically indicates the total number of solute particles per kilogram of water in blood plasma. This value reflects the body's hydration status and is tightly regulated through mechanisms controlling water intake and output. While water consumption is a conscious decision, the body has intrinsic regulatory systems to maintain fluid balance. Dehydration, a state of water deficit...
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Responses to Drought and Flooding02:41

Responses to Drought and Flooding

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Water plays a significant role in the life cycle of plants. However, insufficient or excess of water can be detrimental and pose a serious threat to plants.
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Design Example: Managing Concrete Workability01:14

Design Example: Managing Concrete Workability

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This example deals with managing the workability of concrete for a raft foundation project under hot weather conditions. Workability is crucial for ensuring the concrete is easy to place, compact, and finish. In this scenario, a slump test — a common method to measure the workability of fresh concrete — initially indicated low workability. This was attributed to the rapid water loss from the concrete mix, exacerbated by the high temperatures causing the course aggregates to heat up.
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The Use of an Automated System GreenFeed to Monitor Enteric Methane and Carbon Dioxide Emissions from Ruminant Animals
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通过应用智能技术,减少冷却奶牛的用水量.

L T Casarotto1, F X Amaro1, J M Lance1

  • 1Department of Animal Sciences, IFAS, University of Florida, Gainesville, FL 32611.

JDS communications
|March 6, 2026
PubMed
概括

一个自动化的智能冷却系统有效地减少了干奶奶牛的热应激,改善了干物质的摄入量并保持了福利. 与传统方法相比,这种智能冷却系统还减少了用水量.

科学领域:

  • 动物科学动物科学
  • 乳牛管理 乳牛管理
  • 牲畜中的环境压力

背景情况:

  • 热压对奶牛的生产和福利产生了负面影响.
  • 积极的冷却方法,包括阴影,通风和浸泡器,对于减轻热应激至关重要.
  • 自动化冷却系统为提高效率和有效性提供了潜力.

研究的目的:

  • 评估自动智能冷却系统 (Agpro) 与传统冷却方法相比,在干奶奶牛中减轻热应激的有效性.
  • 评估不同冷却策略对干物摄入量 (DMI),用水量和生理参数的影响.

主要方法:

  • 一项涉及无双和多双孕期荷尔斯坦奶牛在干旱期间的研究.
  • 三种处理组:常规冷却 (CL),智能冷却 (SS) 和没有主动冷却的热应力 (HT).
  • 测量包括DMI,摄入水量,用水量,血红素,呼吸速率,直肠温度和阴道温度.

主要成果:

  • 智能冷却 (SS) 系统有效地冷却了奶牛,与传统冷却 (CL) 相比,优于热应力 (HT) 组.
  • 在HT组中的奶牛表现出较低的DMI和更高的呼吸速率和温度.
  • 与传统冷却相比,SS系统显示每头奶牛的用水量减少.

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A CO2 Concentration Gradient Facility for Testing CO2 Enrichment and Soil Effects on Grassland Ecosystem Function
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Coupling Carbon Capture from a Power Plant with Semi-automated Open Raceway Ponds for Microalgae Cultivation
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A CO2 Concentration Gradient Facility for Testing CO2 Enrichment and Soil Effects on Grassland Ecosystem Function
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结论:

  • 自动智能冷却系统在干燥奶牛的热应激管理方面与传统冷却一样有效.
  • 智能冷却系统为减轻热应激提供了一种更节水的方法.
  • 实施智能冷却技术可以在干旱期间保持动物福利并改善生理参数.