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Assembly of Complex Microtubule Structures01:32

Assembly of Complex Microtubule Structures

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.
The Supercomplexes in the Crista Membrane01:41

The Supercomplexes in the Crista Membrane

The mitochondrial cristae membrane is the primary site for the oxidative phosphorylation (OXPHOS) process of energy conversion mediated through respiratory complexes I to V. These complexes have been widely studied for decades, and it has been proven that they form supramolecular structures called respiratory supercomplexes (SC). These higher-order complexes may be crucial in maintaining the biochemical structure and improving the physiological activity of the individual complexes while...
Woodward–Hoffmann Selection Rules and Microscopic Reversibility01:34

Woodward–Hoffmann Selection Rules and Microscopic Reversibility

Electrocyclic reactions, cycloadditions, and sigmatropic rearrangements are concerted pericyclic reactions that proceed via a cyclic transition state. These reactions are stereospecific and regioselective. The stereochemistry of the products depends on the symmetry characteristics of the interacting orbitals and the reaction conditions. Accordingly, pericyclic reactions are classified as either symmetry-allowed or symmetry-forbidden. Woodward and Hoffmann presented the selection criteria for...
Structural Organization of the Human Body: An Overview01:18

Structural Organization of the Human Body: An Overview

It is convenient to consider the body's structures in terms of fundamental levels of organization that increase in complexity: subatomic particles, atoms, molecules, organelles, cells, tissues, organs, organ systems, and organisms.
To study the chemical level of organization, scientists consider the simplest building blocks of matter: subatomic particles, atoms, and molecules. All matter in the universe is composed of one or more unique pure substances called elements, familiar examples of...
Design Consideration01:22

Design Consideration

Designing a structure involves a series of considerations, primarily the material's ultimate strength, calculated through tests that measure changes under increased force until the material reaches its breaking point or limit. The ultimate load, where the material breaks, is divided by its original cross-sectional area, resulting in the ultimate normal stress or strength. The ultimate shearing stress is another significant factor taken into account.
The factor of safety is another key aspect...
Levels of Organization01:09

Levels of Organization

Biological organization is the classification of biological structures, ranging from atoms at the bottom of the hierarchy to the Earth's biosphere. Each level of the hierarchy represents an increase in complexity that builds upon the previous level.
Molecules Are Composed of Atoms, and Biomolecules Are Assembled from Molecules:
The most basic levels include atoms, molecules, and biomolecules. Atoms, the smallest unit of ordinary matter, are composed of a nucleus and electrons. Molecules...

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Updated: May 11, 2026

Design, Surface Treatment, Cellular Plating, and Culturing of Modular Neuronal Networks Composed of Functionally Inter-connected Circuits
10:32

Design, Surface Treatment, Cellular Plating, and Culturing of Modular Neuronal Networks Composed of Functionally Inter-connected Circuits

Published on: April 15, 2015

合理的に設計された複雑で階層的なマイクロアーキテクチャ.

Wim L Noorduin1, Alison Grinthal, L Mahadevan

  • 1School of Engineering and Applied Sciences, Harvard University, Cambridge, MA 02138, USA. wnoord@seas.harvard.edu

Science (New York, N.Y.)
|May 21, 2013
PubMed
まとめ
この要約は機械生成です。

研究者らは,ダイナミックな反応拡散システムを使用して,プログラム可能な炭酸塩-シリカ微構造を開発しました. 二酸化炭素 (CO2) 拡散の精密な制御により,光学,触媒,および電子機器のための複雑で多スケールなアーキテクチャの作成が可能になります.

さらに関連する動画

Micro-masonry for 3D Additive Micromanufacturing
08:45

Micro-masonry for 3D Additive Micromanufacturing

Published on: August 1, 2014

関連する実験動画

Last Updated: May 11, 2026

Design, Surface Treatment, Cellular Plating, and Culturing of Modular Neuronal Networks Composed of Functionally Inter-connected Circuits
10:32

Design, Surface Treatment, Cellular Plating, and Culturing of Modular Neuronal Networks Composed of Functionally Inter-connected Circuits

Published on: April 15, 2015

Micro-masonry for 3D Additive Micromanufacturing
08:45

Micro-masonry for 3D Additive Micromanufacturing

Published on: August 1, 2014

科学分野:

  • マテリアルサイエンス 材料科学
  • ナノテクノロジー ナノテクノロジー
  • 化学工学は化学工学というものです.

背景:

  • 複雑なナノおよびマイクロ構造は,光学,触媒,および電子学の進歩に不可欠です.
  • これらの構造の形をプログラムすることは,実用的な応用のために不可欠です.

研究 の 目的:

  • 合理的に設計し,さまざまな炭酸シリカ微細構造を正確に彫刻するための方法を開発する.
  • 制御された自己組み立てのためのダイナミック反応拡散システムの使用を検討する.

主な方法:

  • バリウム塩化物とナトリウムメタシリケート溶液を含むダイナミック反応拡散システムを利用しました.
  • 二酸化炭素 (CO2) の拡散を制御して微細構造を彫刻する.
  • CO2濃度,pH,および温度を調節することによって,二つの異なる成長モードを特定し,操作しました.

主要な成果:

  • 高精度で様々な基本的および複雑なマイクロ構造を成功裏に作成しました.
  • 制御された環境調節による成長レジムの間の決定的な切り替えが実証されています.
  • マルチスケールマイクロ構造の階層的組み立てを達成しました.

結論:

  • 自己組み立てプロセスとのリアルタイムでのコラボレーションのためのナノテクノロジー戦略を確立しました.
  • 前例のない複雑さを持つ任意の構造構造の創造を可能にしました.
  • さまざまな技術的な用途のために先進的な材料を製造するための新しい道を開きました.