Jove
Visualize
お問い合わせ
JoVE
x logofacebook logolinkedin logoyoutube logo
JoVEについて
概要リーダーシップブログJoVEヘルプセンター
著者向け
出版プロセス編集委員会範囲と方針査読よくある質問投稿
図書館員向け
推薦の声購読アクセスリソース図書館諮問委員会よくある質問
研究
JoVE JournalMethods CollectionsJoVE Encyclopedia of Experimentsアーカイブ
教育
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab Manual教員リソースセンター教員サイト
利用規約
プライバシーポリシー
ポリシー

関連する概念動画

Specific Heat01:16

Specific Heat

67.4K
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...
67.4K
Heat Flow and Specific Heat01:12

Heat Flow and Specific Heat

6.8K
Heat is a type of energy transfer that is caused by a temperature difference, and it can change the temperature of an object. Since heat is a form of energy, its SI unit is the joule (J). Another common unit of energy often used for heat is the calorie (cal), which is defined as the energy needed to change the temperature of 1 g of water by 1 °C, specifically between 14.5 °C and 15.5 °C, since the energy needed shows a slight temperature dependence. Another commonly used unit is...
6.8K
Enthalpy and Heat of Reaction02:12

Enthalpy and Heat of Reaction

9.8K
Combustion, commonly known as burning, is a reaction in which a substance reacts with an oxidizing agent, which in most cases is molecular oxygen, to liberate energy in the form of heat, light, or sound. The heat of combustion is also known as the enthalpy of combustion. The energy released when one mole of a substance undergoes complete combustion at constant pressure is called molar heat of combustion. Combustion reactions are exothermic; that is, they release energy, and their ΔH sign...
9.8K
Local Anesthetics: Adverse Effects01:12

Local Anesthetics: Adverse Effects

795
While local anesthetics are generally safe and well-tolerated, they can occasionally cause adverse effects that vary in severity. Local anesthetics can induce toxicity at two distinct levels. They can either produce local effects through direct contact with the neural elements or be absorbed into the bloodstream from the injection site, leading to systemic effects.
Once absorbed into the systemic circulation, local anesthetics can affect the organs that depend on the functioning of sodium...
795
What is a Mode?01:07

What is a Mode?

25.9K
The mode is one of the commonly used measures of a central tendency. It is defined as the most frequent value in a data set.
There can be more than one mode in a data set if multiple values have the same highest frequency. For instance, suppose that the Statistics exam scores of 20 students are: 50; 53; 59; 59; 63; 63; 72; 72; 72; 72; 72; 76; 78; 81; 83; 84; 84; 84; 90; 93. Here, the mode is 72, as it occurs most frequently, five times.
A data set with two modes is called bimodal. For example,...
25.9K
Heating and Cooling Curves02:44

Heating and Cooling Curves

27.6K
When a substance—isolated from its environment—is subjected to heat changes, corresponding changes in temperature and phase of the substance is observed; this is graphically represented by heating and cooling curves.
For instance, the addition of heat raises the temperature of a solid; the amount of heat absorbed depends on the heat capacity of the solid (q = mcsolidΔT). According to thermochemistry, the relation between the amount of heat absorbed or released by a substance, q, and its...
27.6K

こちらも読む

関連記事

共著者、ジャーナル、引用グラフによってこの研究に関連する記事。

並び替え
Same author

Symmetry-Enabled Optical Spin Initialization of Luminescent Organic Radical Doublet States.

Journal of the American Chemical Society·2026
Same author

Terahertz-Field-Induced Dissociation of Frenkel Excitons in Organic Semiconductors.

Journal of the American Chemical Society·2026
Same author

Mechanophore cross-linking enhances ballistic energy dissipation of polymers.

Nature·2026
Same author

Floquet States of Chemoselective Alternating Current Electrosynthesis.

Journal of the American Chemical Society·2026
Same author

In vivo evaluation of synthetic cannabinoid JWH-018 derivatives as potential new psychoactive substances.

Scientific reports·2026
Same author

Mapping Molecular Polariton Transport via Pump-Probe Microscopy.

Nano letters·2026
Same journal

Stability of Some Ternary 13-Atom Icosahedral Clusters Assessed with Geometric, Electronic, and Thermodynamic Criteria.

The journal of physical chemistry. A·2026
Same journal

A Three-Phase Distribution Method for Quantifying the Intermolecular Interactions.

The journal of physical chemistry. A·2026
Same journal

Cooperative Effects in the Inverse Coordination Complexes of Aromatic Azines and Tin(IV) Halides.

The journal of physical chemistry. A·2026
Same journal

The Infrared Spectra of Neutral Dimethyl-Sulfide, -Disulfide and -Sulfoxide Biomarkers in Molecular Beams.

The journal of physical chemistry. A·2026
Same journal

Photoinduced Charge-Transfer Suppresses Triplet Formation Efficiency in Thiocoumarins: Evidence from Ultrafast Spectroscopy and Theoretical Calculations.

The journal of physical chemistry. A·2026
Same journal

Porphyrin Aggregation Revisited: From the Four-Orbital Gouterman Model to an Eight-Orbital Framework in Porphin H-Dimers.

The journal of physical chemistry. A·2026
関連記事をすべて見る

関連する実験動画

Updated: Jan 28, 2026

Subsurface Defect Localization by Structured Heating Using Laser Projected Photothermal Thermography
11:34

Subsurface Defect Localization by Structured Heating Using Laser Projected Photothermal Thermography

Published on: May 15, 2017

11.6K

赤外レーザー駆動反応におけるモード特異的加熱と局所的加熱の効果

Sindhana Pannir-Sivajothi1,2, Yong Rui Poh1, Zi-Jie Liu3

  • 1Department of Chemistry and Biochemistry, University of California San Diego, La Jolla, California 92037, United States.

The journal of physical chemistry. A
|January 26, 2026
PubMed
まとめ
この要約は機械生成です。

赤外レーザーによる分子反応性の制御は、急速なエネルギー再分配のため困難である。本研究は、レーザー誘起加熱と振動支援が反応速度を向上させることを定量化し、低周波モードで大幅な向上が見られることを示している。

キーワード:
赤外レーザー分子反応性振動モードエネルギー再分配反応速度向上化学物理学レーザー化学

さらに関連する動画

Continuous-wave Thulium Laser for Heating Cultured Cells to Investigate Cellular Thermal Effects
09:49

Continuous-wave Thulium Laser for Heating Cultured Cells to Investigate Cellular Thermal Effects

Published on: June 30, 2017

8.2K
Characterizing Far-infrared Laser Emissions and the Measurement of Their Frequencies
09:38

Characterizing Far-infrared Laser Emissions and the Measurement of Their Frequencies

Published on: December 18, 2015

12.6K

関連する実験動画

Last Updated: Jan 28, 2026

Subsurface Defect Localization by Structured Heating Using Laser Projected Photothermal Thermography
11:34

Subsurface Defect Localization by Structured Heating Using Laser Projected Photothermal Thermography

Published on: May 15, 2017

11.6K
Continuous-wave Thulium Laser for Heating Cultured Cells to Investigate Cellular Thermal Effects
09:49

Continuous-wave Thulium Laser for Heating Cultured Cells to Investigate Cellular Thermal Effects

Published on: June 30, 2017

8.2K
Characterizing Far-infrared Laser Emissions and the Measurement of Their Frequencies
09:38

Characterizing Far-infrared Laser Emissions and the Measurement of Their Frequencies

Published on: December 18, 2015

12.6K

科学分野:

  • 化学物理学
  • 分子動力学
  • レーザー化学

背景:

  • 赤外レーザーを用いた分子反応性の制御は、特定の振動モードを標的とする。
  • 急速な分子内振動エネルギー再分配（IVR）は、精密なエネルギー制御を制限する。
  • フェムト秒レーザー技術の進歩により、レーザー駆動反応性の再検討が可能になった。

研究 の 目的:

  • モード特異的な支援とレーザー誘起加熱が反応速度の向上に寄ちする寄与を理論的に定量化すること。
  • 活性化障壁が反応速度の向上に与える影響を調査すること。
  • レーザー駆動条件が反応速度に与える影響を決定すること。

主な方法:

  • レーザー駆動分子反応の理論的モデリング。
  • エネルギー移動経路（IVR）の定量化。
  • 様々な条件下（パルス対連続波レーザー、低障壁対高障壁反応）での反応速度の向上の分析。

主要な成果:

  • 低い活性化障壁を持つ反応では、相対的な反応速度の向上が小さくなる。
  • 低障壁反応では局所的加熱が反応速度の向上を支配し、高障壁反応では振動支援がより顕著になる。
  • パルスレーザー駆動は、同等の吸収電力において連続波駆動よりも大幅に大きな反応速度の向上をもたらす。
  • 低周波モードでは実質的な反応速度の向上が可能である。

結論:

  • レーザー誘起加熱と振動支援の両方が反応速度の向上に寄与する。
  • これらのメカニズムの相対的な重要性は、反応の活性化障壁と溶媒の特性に依存する。
  • 全体的な反応速度の向上は控えめであるが、特に低周波モードが関与する特定の条件下では、実質的な増加が得られる可能性がある。