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相关概念视频

Thermosensation01:43

Thermosensation

30.5K
Peripheral thermosensation is the perception of external temperature. A change in temperature (on the surface of the skin and other tissues) is detected by a family of temperature-sensitive ion channels called Transient Receptor Potential, or TRP, receptors. These receptors are located on free nerve endings. Those detecting cold temperatures are closer to the surface of the skin than the nerve endings detecting warmth. These thermoTRP channels, while temperature selective, have relatively...
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Temperature Dependent Deformation01:12

Temperature Dependent Deformation

152
In a nonhomogeneous rod made up of steel and brass, restrained at both ends and subjected to a temperature change, several steps are involved in calculating the stress and compressive load. Due to the problem's static indeterminacy, one end support is disconnected, allowing the rod to experience the temperature change freely. Next, an unknown force is applied at the free end, triggering deformations in the rod's steel and brass portions. These deformations are then calculated and added...
152
Temperature and Thermal Equilibrium01:11

Temperature and Thermal Equilibrium

6.8K
Heat and temperature are essential concepts for everyone every day. The study of heat and temperature is part of an area of physics known as thermodynamics. It is not always easy to distinguish heat and temperature.
The concept of temperature has evolved from the common concepts of hot and cold. The scientific definition of temperature explains more than just our sense of hot and cold. Temperature is operationally defined as the quantity measured with a thermometer. Furthermore, temperature is...
6.8K
Thermal Sigmatropic Reactions: Overview01:16

Thermal Sigmatropic Reactions: Overview

2.1K
Sigmatropic rearrangements are a class of pericyclic reactions in which a σ bond migrates from one part of a π system to another. These are intramolecular rearrangements where the total number of σ and π bonds remain unchanged.
Sigmatropic shifts are classified based on an order term [i, j ], where i and j indicate the number of atoms across which each end of the σ bond migrates. Below are examples of a [3,3] sigmatropic shift in...
2.1K
Assessing Body Temperature - Temporal Artery01:19

Assessing Body Temperature - Temporal Artery

566
Here is a stepwise guide to assessing the body temperature at the temporal artery using a temporal artery thermometer
Step 1: Perform hand hygiene and don a fresh pair of gloves to prevent cross-infection and ensure patient safety.
Step 2: Explain the procedure to the patient to establish trust. Clear communication establishes trust with the patient, ensures they understand what to expect, promotes cooperation, and enhances comfort during the procedure.  
Step 3: Assess the patient's...
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Thermal Stress01:09

Thermal Stress

2.4K
If the temperature of an object is changed while it is prevented from expanding or contracting, the object is subjected to stress. The stress is compressive if the object expands in the absence of constraint and tensile if it contracts. This stress resulting from temperature change is known as thermal stress. It can be quite large and can cause damage. To avoid this stress, engineers may design components so they can expand and contract freely. For instance, on highways, gaps are deliberately...
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相关实验视频

Updated: Jul 15, 2025

High-resolution Thermal Micro-imaging Using Europium Chelate Luminescent Coatings
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High-resolution Thermal Micro-imaging Using Europium Chelate Luminescent Coatings

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使用热敏智能材料可视化温度不均性.

Panqin Wang1, Jiaren Du1, Tengyue Wang1

  • 1International Joint Research Center for Photo-responsive Molecules and Materials, School of Chemical and Material Engineering, Jiangnan University, 214122, Wuxi, China. jiaren.du@jiangnan.edu.cn.

Materials horizons
|October 4, 2023
PubMed
概括

研究人员开发了一种新的热色材料,SrGa$_{12-x}$Al$_{x}$O$_{19}$:Dy$^{3+}$,使温度场的多色可视化成为可能. 这种智能材料提供了一种简单有效的方法来绘制热分布图,克服了以前技术的局限性.

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Fabricating Degradable Thermoresponsive Hydrogels on Multiple Length Scales via Reactive Extrusion, Microfluidics, Self-assembly, and Electrospinning
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Experimental Methods for Investigation of Shape Memory Based Elastocaloric Cooling Processes and Model Validation
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Fabricating Degradable Thermoresponsive Hydrogels on Multiple Length Scales via Reactive Extrusion, Microfluidics, Self-assembly, and Electrospinning
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Experimental Methods for Investigation of Shape Memory Based Elastocaloric Cooling Processes and Model Validation
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科学领域:

  • 材料科学 材料科学 材料科学
  • 发光的光度是非常的低.
  • 频谱学是一种光谱学.

背景情况:

  • 热响应材料通常提供单色可视化,限制了它们在复杂的热场分析中的应用.
  • 目前用于热场评估的方法通常很慢,需要专门的设备,并且容易出现不准确性,特别是在高温下.

研究的目的:

  • 开发一种新的热色智能材料,用于灵活和多色可视化温度不均性.
  • 研究材料热响应发光特性背后的光物理机制.

主要方法:

  • 合成和特征的SrGa$_{12-x}$Al$_{x}$O$_{19}$:Dy$^{3+}$热色材料. 这是一个很好的方法.
  • 研究稳定状态温度依赖的发光和热刺激发光 (TSL) 特性.
  • 对主体 (SrGa$_{12-x}$Al$_{x}$O$_{19}$) 和剂 (Dy$^{3+}$) 排放之间的光学集成进行分析.

主要成果:

  • 开发的材料通过两个发光模式表现出明显的热色特性.
  • 观察到丰富的颜色变化 (黄色,绿色,红色),归因于宿主和辅助剂的协同光学效应.
  • 该材料在特定的热刺激下表现出卓越的光学集成,导致多色温度可视化.

结论:

  • SrGa$_{12-x}$Al$_{x}$O$_{19}$:Dy$^{3+}$ 在可视化多色输出温度场方面取得了突破.
  • 这种热敏材料能够高效,直接地绘制看不见的热分布.
  • 潜在的应用涵盖了需要精确热监测的各种工业部门.