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関連する概念動画

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
Thermodynamic Systems01:06

Thermodynamic Systems

4.9K
A thermodynamic system is a set of objects whose thermodynamic properties are of interest. The system is considered to be embedded in its surroundings or the environment. The system and its environment can exchange heat and do work on each other through a boundary that separates them. However, the immediate surroundings of the system interact with it directly and therefore have a much stronger influence on its behavior and properties.
Consider an example of  tea boiling in a kettle. The...
4.9K
Thermochemical Equations02:55

Thermochemical Equations

28.2K
For a chemical reaction (the system) carried out at constant pressure – with the only work done caused by expansion or contraction – the enthalpy of reaction (also called the heat of reaction, ΔHrxn) is equal to the heat exchanged with the surroundings (qp).
28.2K
Thermal expansion and Thermal stress: Problem Solving01:27

Thermal expansion and Thermal stress: Problem Solving

1.1K
San Francisco's Golden Gate Bridge is exposed to temperatures ranging from -15 °C to 40 °C. At its coldest, the main span of the bridge is 1275 m long. Assuming that the bridge is made entirely of steel, what is the change in its length between these temperatures?
To solve the problem, first, identify the known and unknown quantities. The initial length (L) of the bridge is 1275 m, the coefficient of linear expansion (α) for steel is 12 x 10-6/°C, and the change in...
1.1K
Thermosensation01:43

Thermosensation

30.3K
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...
30.3K
Thermal Expansion01:22

Thermal Expansion

4.3K
The expansion of alcohol in a thermometer is one of many commonly encountered examples of thermal expansion, which is the change in size or volume of a given system as its temperature changes. The most visible example is the expansion of hot air. When air is heated, it expands and becomes less dense than the surrounding air, which then exerts an upward force on the hot air to, for example, make steam and smoke rise, and hot air balloons float. The same behavior happens in all liquids and gases,...
4.3K

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関連する実験動画

Updated: Jun 4, 2025

Asymmetric Thermoelectrochemical Cell for Harvesting Low-grade Heat under Isothermal Operation
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Asymmetric Thermoelectrochemical Cell for Harvesting Low-grade Heat under Isothermal Operation

Published on: February 5, 2020

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再生可能エネルギーの用途のためのトリモダルの熱貯蔵材料

Saliha Saher1, Sam Johnston1, Ratu Esther-Kelvin1

  • 1School of Chemistry, Monash University, Clayton, Victoria, Australia.

Nature
|December 18, 2024
PubMed
まとめ

潜在的,熱化学的,そして合理的なエネルギー貯蔵を組み合わせた 新種のトリモダル材料が 記録的な熱エネルギー吸収を達成します この低コストで持続可能な素材は 効率的な再生可能エネルギー貯蔵ソリューションの 突破口となります

さらに関連する動画

Author Spotlight: Advancements in High-Performance Thermoelectric Thin Films Through Radio Frequency Magnetron Sputtering
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Author Spotlight: Advancements in High-Performance Thermoelectric Thin Films Through Radio Frequency Magnetron Sputtering

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Reducing Willow Wood Fuel Emission by Low Temperature Microwave Assisted Hydrothermal Carbonization
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Reducing Willow Wood Fuel Emission by Low Temperature Microwave Assisted Hydrothermal Carbonization

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関連する実験動画

Last Updated: Jun 4, 2025

Asymmetric Thermoelectrochemical Cell for Harvesting Low-grade Heat under Isothermal Operation
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Author Spotlight: Advancements in High-Performance Thermoelectric Thin Films Through Radio Frequency Magnetron Sputtering
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Reducing Willow Wood Fuel Emission by Low Temperature Microwave Assisted Hydrothermal Carbonization
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Reducing Willow Wood Fuel Emission by Low Temperature Microwave Assisted Hydrothermal Carbonization

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科学分野:

  • 材料科学
  • エネルギー貯蔵
  • 再生可能エネルギー

背景:

  • 化石燃料からの移行は 先進的なエネルギー貯蔵ソリューションを必要とします
  • 熱エネルギー貯蔵材料は,再生可能エネルギー源を統合するために不可欠です.
  • 現在の限界には,安定した,費用対効果の高い,エネルギー密度の高い材料の欠如があります.

研究 の 目的:

  • 効率的な熱エネルギー貯蔵のための新しい材料を開発する.
  • 複数のエネルギー貯蔵メカニズムを単一の材料に統合する
  • 既存の熱エネルギー貯蔵技術の限界に対処する.

主な方法:

  • ボリック酸とサクシン酸の混合物を研究した.
  • 材料の熱エネルギー貯蔵能力を特徴づけている.
  • 数々の加熱・冷却サイクルにおける熱安定性を評価した.

主要な成果:

  • 潜在的,熱化学的,そして実用的なエネルギー貯蔵を統合した"トリモダル"素材を報告した.
  • ~150°Cで394 ± 5J/gの記録的な可逆熱エネルギー吸収を達成した.
  • 1000サイクル以上の 熱安定性を示した.

結論:

  • 開発された材料は,エネルギー貯蔵モードの相乗効果の組み合わせを提供します.
  • 低コストで 環境に優しい 高い性能は 重要な進歩です
  • この研究は,高容量の熱エネルギー貯蔵材料のための新しい道を開きます.