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

Temperature Dependence on Reaction Rate02:55

Temperature Dependence on Reaction Rate

88.6K
The Collision Theory
Atoms, molecules, or ions must collide before they can react with each other. Atoms must be close together to form chemical bonds. This premise is the basis for a theory that explains many observations regarding chemical kinetics, including factors affecting reaction rates.
The collision theory is based on the postulates that (i) the reaction rate is proportional to the rate of reactant collisions, (ii) the reacting species collide in an orientation allowing contact between...
88.6K
The Integrated Rate Law: The Dependence of Concentration on Time02:39

The Integrated Rate Law: The Dependence of Concentration on Time

41.1K
While the differential rate law relates the rate and concentrations of reactants, a second form of rate law called the integrated rate law relates concentrations of reactants and time. Integrated rate laws can be used to determine the amount of reactant or product present after a period of time or to estimate the time required for a reaction to proceed to a certain extent. For example, an integrated rate law helps determine the length of time a radioactive material must be stored for its...
41.1K
Responses to Gravity and Touch02:26

Responses to Gravity and Touch

41.7K
Gravitropism: Plant Responses to Gravity
41.7K
Center of Gravity00:58

Center of Gravity

6.6K
The center of gravity (COG) of an object is the point where the object's total weight is considered to be concentrated. Knowing the location of the center of gravity is useful when predicting the behavior of a moving object or designing static structures. In a uniform gravitational field, the center of gravity is similar to the center of mass (COM); yet, these two points can be positioned differently. For example, the Moon's center of mass lies very close to its geometric center, but...
6.6K
Center of Gravity01:15

Center of Gravity

2.1K
The center of gravity is the point at which an object's weight appears to be concentrated and can be used to balance the object perfectly. This point is essential in mechanics as it provides information regarding a body's stability and moments of inertia. The center of gravity does not always have to fall within the shape or boundaries of the body; it may also lie outside the body in certain cases.
To determine its location, the principle of moments can be utilized by dividing the object into...
2.1K
Acceleration due to Gravity on Other Planets01:24

Acceleration due to Gravity on Other Planets

4.9K
The gravitational acceleration of an object near the Earth's surface is called the acceleration due to gravity. It can be measured by conducting simple experiments on Earth. However, such an experiment is impossible to conduct on the surface of other planets.
Astronomical observations are thus used to measure the acceleration due to gravity on other planets. This can be determined by observing the effect of a planet's gravity on objects close to it. The crucial factor that helps in this...
4.9K

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

Comparison of frequency-resolved optical polarization gating induced by molecular alignment and Kerr effects.

Optics letters·2012
Same author

Direct transformation of simple enals to 3,4-disubstituted benzaldehydes under mild reaction conditions via an organocatalytic regio- and chemoselective dimerization cascade.

Chemistry (Weinheim an der Bergstrasse, Germany)·2012
Same author

[Digital anatomy of the perforator flap in the thigh].

Zhonghua zheng xing wai ke za zhi = Zhonghua zhengxing waike zazhi = Chinese journal of plastic surgery·2012
Same author

[Value of methylation-specific mutiplex ligation-dependent probe in the diagnosis of Prader-Willi syndrome].

Zhongguo dang dai er ke za zhi = Chinese journal of contemporary pediatrics·2012
Same author

Elevated local TGF-β1 level predisposes a closed bone fracture to tuberculosis infection.

Medical hypotheses·2012
Same author

Modulation of P-glycoprotein expression by triptolide in adriamycin-resistant K562/A02 cells.

Oncology letters·2012

関連する実験動画

Updated: Jan 24, 2026

In Vitro Growth of Mouse Preantral Follicles Under Simulated Microgravity
10:48

In Vitro Growth of Mouse Preantral Follicles Under Simulated Microgravity

Published on: December 17, 2017

8.8K

重力依存的な粒状侵入における速度依存性：微小重力実験とシミュレーション

Meiying Hou1, Xiaohui Cheng2, Sen Yang3

  • 1Beijing National Laboratory for Condensed Matter Physics and Laboratory of Soft Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing, China. mayhou@iphy.ac.cn.

NPJ microgravity
|January 22, 2026
PubMed
まとめ

重力は粒状物質の侵入に大きな影響を与える。通常の重力（1g）とは異なり、微小重力（0g）では圧力依存性の摩擦により、抵抗力が速度とともに急激に増加する。

キーワード:
粒状物質侵入抗力微小重力重力依存性摩擦

さらに関連する動画

Culturing Lymphocytes in Simulated Microgravity Using a Rotary Cell Culture System
09:28

Culturing Lymphocytes in Simulated Microgravity Using a Rotary Cell Culture System

Published on: August 25, 2022

3.5K
Simulating Temperature in a Soil Incubation Experiment
08:39

Simulating Temperature in a Soil Incubation Experiment

Published on: October 28, 2022

3.5K

関連する実験動画

Last Updated: Jan 24, 2026

In Vitro Growth of Mouse Preantral Follicles Under Simulated Microgravity
10:48

In Vitro Growth of Mouse Preantral Follicles Under Simulated Microgravity

Published on: December 17, 2017

8.8K
Culturing Lymphocytes in Simulated Microgravity Using a Rotary Cell Culture System
09:28

Culturing Lymphocytes in Simulated Microgravity Using a Rotary Cell Culture System

Published on: August 25, 2022

3.5K
Simulating Temperature in a Soil Incubation Experiment
08:39

Simulating Temperature in a Soil Incubation Experiment

Published on: October 28, 2022

3.5K

科学分野:

  • 地球物理学
  • 材料科学
  • 流体力学

背景:

  • 様々な重力下での粒状物質の挙動を理解することは、惑星探査や海底地震工学にとって不可欠である。
  • 粒状媒体への物体侵入中の抗力に対する重力の影響を調査することは、極めて重要である。

研究 の 目的:

  • 粒状物質に侵入するシリンダーが経験する抵抗抗力に対する重力の影響を実験的に定量化すること。
  • 通常の重力（1g）と微小重力（0g）における粒状侵入ダイナミクスを比較すること。

主な方法:

  • 1gおよび微小重力（0g）で実験を行い、北京落下塔を使用した。
  • 粒状床を一定速度で移動するシリンダーにかかる抵抗力を測定した。
  • 実験結果を裏付けるために、連成オイラー・ラグランジュ（CEL）シミュレーションを使用した。

主要な成果:

  • 微小重力（0g）下では、シリンダーの速度とともに抵抗力が著しく増加した。
  • 通常の重力（1g）下では、シリンダーの速度とともに抵抗力ははるかにゆっくりと増加した。
  • 観察された違いは、微小重力下で優勢になる圧力依存性の摩擦力に起因すると考えられた。

結論:

  • 重力は、侵入中の粒状物質のレオロジー挙動において重要な役割を果たしている。
  • 微小重力下での粒状流の構成モデルは、1g条件で使用されるモデルとは大きく異なる必要がある。
  • この結果は、地球外探査および海底地質ハザード評価に影響を与える。