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相关概念视频

Specific Heat01:16

Specific Heat

The specific heat capacity of a substance refers to the energy required to increase the temperature of one gram of that substance by one degree Celcius. Specific heat capacity is often represented in calories (cal), grams (g), and degrees Celsius (oC), but can also be expressed in joules (J), kilograms (kg), and Kelvin (K), among other units.
For example, increasing the temperature of one gram of water by 1°C requires one calorie of heat energy and can be written as 1 cal/g-°C, or 4186 J/kg/K.
Bone Structure01:55

Bone Structure

Within the skeletal system, the structure of a bone, or osseous tissue, can be exemplified in a long bone, like the femur, where there are two types of osseous tissue: cortical and cancellous.
Quantifying Heat02:46

Quantifying Heat

Thermal Energy Microscopically, thermal energy is the kinetic energy associated with the random motion of atoms and molecules. Temperature is a quantitative measure of “hot” or “cold”, which depends on the amount of thermal energy. When the atoms and molecules in an object are moving or vibrating quickly, they have a higher average kinetic energy (KE) (or higher thermal energy), and the object is perceived as “hot”, or it is described as being at a higher temperature. When the atoms and...
Assessing Body Temperature - Temporal Artery01:19

Assessing Body Temperature - Temporal Artery

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 forehead...
The Bone Matrix01:18

The Bone Matrix

Bone contains a relatively small number of cells entrenched in a matrix of collagen fibers that provide an adherent surface for inorganic salt crystals. Both components of the matrix, organic and inorganic, contribute to the unusual properties of bone. Without collagen, bones would be brittle and shatter easily. Without mineral crystals, bones would flex and provide little support. This can be observed by an experiment: when the minerals of a bone are dissolved by soaking the bone in acid or...
Heat Capacity: Problem-Solving01:17

Heat Capacity: Problem-Solving

The heat capacity of a gas is the amount of heat energy required to raise the temperature of a unit mass of gas by one degree Celsius. It is an important thermodynamic property of gases, and its determination is essential in many industrial and scientific applications. Here are the steps to solve problems related to the heat capacities of gases:
Determine the type of gas: The heat capacity of a gas depends on its molecular structure and the degree of freedom of its molecules. Different types of...

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相关实验视频

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Scanning Skeletal Remains for Bone Mineral Density in Forensic Contexts
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使用组织热容量的骨密度估计.

Aiko Tanaka1, Tetsuya Ogino2

  • 1Department of Nursing, Faculty of Nursing, Sanyo Gakuen University, Okayama, Japan.

Clinical anatomy (New York, N.Y.)
|March 10, 2024
PubMed
概括

通过使用组织热性质来简化骨密度的估计. 阴影表面热传递与骨密度相关,为早期骨质疏松症检测提供潜在的非成像方法.

科学领域:

  • 生物医学工程 生物医学工程
  • 整形外科 整形外科 整形外科
  • 医学物理 医学物理

背景情况:

  • 骨质疏松症通常是无症状的,直到骨折发生,需要更简单的早期检测方法.
  • 目前的骨密度测量技术,如X射线吸收度和定量超声波有局限性.
  • 与其他组织相比,骨的特定热量较低,这表明基于热特性进行评估的潜力.

研究的目的:

  • 通过组织热性质的差异来研究估计骨密度的可行性.
  • 探索一种更简单的,非成像方法,用于早期骨质疏松风险评估.

主要方法:

  • 68名健康的志愿者用冰袋冷却了他们的腿和脚.
  • 测量了皮肤表面温度和热流量,以计算每单位温度的热能转移.
  • 使用定量超声波 (T评分OSISD) 评估骨密度.

主要成果:

  • 脚每单位温度的热能转移与T得分OSISD (r = -0.413,p = 0.001) 有显著的负相关性.
  • 这种在腿上的热性质测量,以及年龄和身高,显著预测了T得分OSISD.
  • 使用对脚的测量,没有发现显著的相关性.

结论:

关键词:
骨密度 骨密度 骨密度骨质疏松症是一种骨质疏松症.公共卫生公共卫生.查检查 查检查 查检查 查检查特定热是指特定的热.

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  • 组织热性质测量,特别是腿的热能转移,可以是一个有用的,更简单的方法来估计骨密度.
  • 这种非侵入性方法可以帮助早期识别骨质疏松症风险.
  • 进一步的研究可以验证这种方法的临床应用.