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

Imperfections in Crystal Structure: Point, Line and Plane Defects01:25

Imperfections in Crystal Structure: Point, Line and Plane Defects

32
A perfect crystal, in theory, has a uniform structure with the same unit cell and lattice points throughout. However, any deviation from this periodic arrangement is known as an imperfection or defect. These defects can be categorized into three types: point, line, and plane defects.Point defects occur when there is a deviation from the ideal due to missing atoms, displaced atoms, or additional atoms. These imperfections might occur due to imperfect packing during crystallization or because of...
32
Actin Treadmilling01:18

Actin Treadmilling

10.0K
Actin filaments undergo polymerization and depolymerization from either end. The polymerization and depolymerization rates depend on the cytosolic concentration of free G-actins. The polymerization rate is generally higher at the plus or barbed end, while the depolymerization rate is higher at the minus or pointed end. At a steady state, critical concentration describes the concentration of free G-actin monomers at which the polymerization rate at the plus end is equal to that of the...
10.0K
Microtubule Instability02:17

Microtubule Instability

6.4K
Microtubules are hollow cylindrical filaments having a diameter of approximately 25 nm and a length that varies from 200 nm to 25 μm. GTP-bound tubulin subunits form αβ-heterodimers for microtubule assembly. These core building blocks interact longitudinally, polymerizing into protofilaments. The protofilaments then interact with one another through lateral bonding forces to form stable cylindrical microtubules. These cylindrical filaments are dynamic as they undergo repeated...
6.4K
Assembly of Complex Microtubule Structures01:32

Assembly of Complex Microtubule Structures

2.8K
Complex microtubule structures are present in resting cells and in dividing cells. In resting cells, they are responsible for maintaining the cellular architecture, tracks for intracellular transport, positioning of organelles, assembly of cilia and flagella. They mediate the bipolar spindle assembly for chromosomal segregation and positioning of the cell division plate in dividing cells. The formation of microtubule complex structures depends on the cell type, cell stage, and cell function.
2.8K
Mechanisms of Membrane Domain Formation00:59

Mechanisms of Membrane Domain Formation

4.3K
Different physical properties of lipids and proteins allow them to localize and form distinct islands or domains in the membrane. Some membrane domains are formed due to protein-protein interactions, whereas others are formed due to the presence of specific lipids such as sphingolipids and sterols—for example, large proteins, such as bacteriorhodopsin, aggregate and create distinct domains.
Another mechanism for membrane domain formation involves membrane proteins interacting with...
4.3K
Mechanism of Lamellipodia Formation01:31

Mechanism of Lamellipodia Formation

3.9K
Cells migrating in response to external stimuli form lamellipodia, which are thin membrane protrusions supported by a mesh of linked, branched, or unbranched actin filaments. These actin filaments interact with myosin motor proteins, creating the dynamic actomyosin complex within the cytoskeleton. Contractility, or the ability to generate contractile stress, is inherent to the actomyosin complex. It helps cells detect the stiffness of the surrounding ECM and exert contractile force for...
3.9K

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

Multistimuli-Controlled Topological Nucleation of Skyrmion Loops and Monopoles in Liquid Crystals.

Physical review letters·2026
Same author

Self-charged polar nematic monopoles and hybrid topological states: intertwining and domain integration.

Nature communications·2026
Same author

Clinical Obesity and New-Onset Atrial Fibrillation: A Population-Based Cohort Study From the Kailuan Cohort.

Diabetes, obesity & metabolism·2026
Same author

Effects of Time in Target Range of Systolic Blood Pressure Control on New-Onset Cardiovascular Diseases and All-Cause Mortality in Young and Middle-Aged Adults with Hypertension.

American journal of hypertension·2026
Same author

Dynamic creation of topological solitons via nematic vortex lines.

Proceedings of the National Academy of Sciences of the United States of America·2026
Same author

Nature-Inspired Magnetic Cilia for Detection and Early Intervention of Vascular Stenosis.

Advanced materials (Deerfield Beach, Fla.)·2026

関連する実験動画

Updated: Mar 12, 2026

Forming, Confining, and Observing Microtubule-Based Active Nematics
08:37

Forming, Confining, and Observing Microtubule-Based Active Nematics

Published on: January 13, 2023

3.3K

トポロジカルな欠陥とパターンによる活性物質の制御

Chenhui Peng1, Taras Turiv1, Yubing Guo1

  • 1Liquid Crystal Institute and Chemical Physics Interdisciplinary Program, Kent State University, Kent, OH 44242, USA.

Science (New York, N.Y.)
|November 19, 2016
PubMed
まとめ

科学者たちは 液晶を用いて 自己駆動するバクテリア バチルス・サブティリスを制御しました バクテリアは複雑なパターンと トポロジカルな欠陥をナビゲートし 将来の技術のために活性物質を コマンドする新しい方法を提案しました

さらに関連する動画

Controlling Flow Speeds of Microtubule-Based 3D Active Fluids Using Temperature
08:04

Controlling Flow Speeds of Microtubule-Based 3D Active Fluids Using Temperature

Published on: November 26, 2019

7.6K
Tuning the Contractility and Deformation Modes of Active Actin-Based Assemblies In Vitro: From Two-Dimensional Active Networks to Liquid Crystal Drops
06:48

Tuning the Contractility and Deformation Modes of Active Actin-Based Assemblies In Vitro: From Two-Dimensional Active Networks to Liquid Crystal Drops

Published on: July 11, 2025

966

関連する実験動画

Last Updated: Mar 12, 2026

Forming, Confining, and Observing Microtubule-Based Active Nematics
08:37

Forming, Confining, and Observing Microtubule-Based Active Nematics

Published on: January 13, 2023

3.3K
Controlling Flow Speeds of Microtubule-Based 3D Active Fluids Using Temperature
08:04

Controlling Flow Speeds of Microtubule-Based 3D Active Fluids Using Temperature

Published on: November 26, 2019

7.6K
Tuning the Contractility and Deformation Modes of Active Actin-Based Assemblies In Vitro: From Two-Dimensional Active Networks to Liquid Crystal Drops
06:48

Tuning the Contractility and Deformation Modes of Active Actin-Based Assemblies In Vitro: From Two-Dimensional Active Networks to Liquid Crystal Drops

Published on: July 11, 2025

966

科学分野:

  • 活性物質物理学
  • 柔らかい物質科学
  • 微生物学

背景:

  • 自己駆動するバクテリアは 微小ロボットシステムや ダイナミックな素材を 動かす可能性を秘めています
  • 複雑な環境における微生物の集団的行動を 制御することは依然として大きな課題です

研究 の 目的:

  • 液晶環境を用いてバクテリアの濃度と軌道パターンの制御を調査する.
  • 液晶内のトポロジカルな欠陥と指向パターンに対する細菌の反応を探求する.

主な方法:

  • 泳ぐバチルス・サブティリスを空間的に変化する液晶に分散させる.
  • 液晶の変形やトポロジカルな欠陥に対するバクテリアのナビゲーションと濃度分布の観察

主要な成果:

  • バクテリアの濃度分布と軌道の幾何学と極性に対する制御が実証された.
  • バクテリアは,スプレー/ベンド領域で双極泳ぎ,そして混合スプレー/ベンド領域で単極泳ぎを観察した.
  • 陽性電荷に惹かれ 負の電荷に抵抗する 微生物を紹介しました

結論:

  • バクテリアは,活性物質の水力学とトポロジーの新しい側面である,液晶に事前に課せられた指向パターンに対する感受性を示す.
  • この研究により 軟質の環境で 細菌の行動を制御する 新しい方法が明らかになりました
  • この発見により 反応性のある素材や 微小デバイスに 細菌を活用する道が開けています