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関連する概念動画

Hydration of Cement01:24

Hydration of Cement

2.0K
Hydration of cement is a chemical reaction between cement particles and water. This process occurs primarily through two mechanisms: through-solution and topochemical. In the through-solution process, anhydrous compounds dissolve into their constituents, hydrates form in the solution, and then precipitate from the supersaturated solution. The topochemical process involves solid-state reactions at the cement particle surface. The through-solution process dominates the topochemical process at the...
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Design Example: Managing Concrete Workability01:14

Design Example: Managing Concrete Workability

421
This example deals with managing the workability of concrete for a raft foundation project under hot weather conditions. Workability is crucial for ensuring the concrete is easy to place, compact, and finish. In this scenario, a slump test — a common method to measure the workability of fresh concrete — initially indicated low workability. This was attributed to the rapid water loss from the concrete mix, exacerbated by the high temperatures causing the course aggregates to heat up.
421
Gradually Varying Flow01:29

Gradually Varying Flow

723
Gradually varying flow (GVF) in open channels describes situations where water depth changes slowly along the channel due to factors like non-uniform bed slope, channel shape variations, or obstructions. This flow type occurs when the depth adjusts gradually to balance gravitational forces, shear forces, and energy requirements, resulting in a low rate of depth change.Characteristics of Gradually Varying FlowGVF is commonly observed in natural streams, rivers, and canals, where flow depth...
723
Underflow Gates01:30

Underflow Gates

565
Underflow gates are vital for controlling water flow in irrigation canals. The three main types of underflow gates — vertical, radial, and drum gates — serve different purposes while ensuring effective flow management. Vertical gates move up and down, generating a free-flowing water jet; radial gates pivot to regulate the flow; and drum gates rotate for precise adjustments. The flow through these gates is influenced by downstream conditions, resulting in free or drowned outflow.Free and...
565
Design Example: Analyzing Capacity Contours for Flood Risk Assessment01:17

Design Example: Analyzing Capacity Contours for Flood Risk Assessment

391
Flood risk assessment involves careful planning and analysis to ensure the safety of communities near water retention structures. Capacity contours are a vital tool in this process, as they illustrate the potential spread of water at specific levels in a given area. In the context of building a bund across a small valley, these contours play a critical role in evaluating the safety of nearby residential areas.In this example, the bund is intended to store stormwater in the valley. The engineers...
391
Applications of Integration to Find Hydrostatic Pressure01:30

Applications of Integration to Find Hydrostatic Pressure

390
Hydrostatic force is a fluid's total force at rest on a surface. For a horizontal surface submerged at a fixed depth, the pressure is constant and calculated as the product of fluid density, gravitational acceleration, and depth. In the case of a vertical dam wall submerged in water, this force is not evenly distributed due to the increasing pressure with depth. This variation arises from the cumulative weight of the water above each point. Integration is used to account for the continuous...
390

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Easy Manipulation of Architectures in Protein-based Hydrogels for Cell Culture Applications
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Easy Manipulation of Architectures in Protein-based Hydrogels for Cell Culture Applications

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エンジニアリングにおける水素ガスの進歩

Yu Shrike Zhang1,2,3, Ali Khademhosseini4,2,3,5,6

  • 1Biomaterials Innovation Research Center, Division of Biomedical Engineering, Department of Medicine, Brigham and Women's Hospital, Harvard Medical School, Cambridge, MA 02139, USA.

Science (New York, N.Y.)
|May 6, 2017
PubMed
まとめ
この要約は機械生成です。

このレビューは,機械的な強さと機能の改善に焦点を当てて,エンジニアリングの水素ガスの進歩をカバーしています. 戦略には,革新的な化学,ダイナミックモジュレーション,多様なアプリケーションのための洗練されたアーキテクチャが含まれています.

さらに関連する動画

An Additive Manufacturing Technique for the Facile and Rapid Fabrication of Hydrogel-based Micromachines with Magnetically Responsive Components
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Gelatin Methacryloyl Granular Hydrogel Scaffolds: High-throughput Microgel Fabrication, Lyophilization, Chemical Assembly, and 3D Bioprinting
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関連する実験動画

Last Updated: May 6, 2026

Easy Manipulation of Architectures in Protein-based Hydrogels for Cell Culture Applications
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An Additive Manufacturing Technique for the Facile and Rapid Fabrication of Hydrogel-based Micromachines with Magnetically Responsive Components
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Gelatin Methacryloyl Granular Hydrogel Scaffolds: High-throughput Microgel Fabrication, Lyophilization, Chemical Assembly, and 3D Bioprinting
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科学分野:

  • 材料科学
  • ポリマー化学
  • 生物医学工学

背景:

  • 水分性ポリマー鎖から成るヒドロゲルは,生物医学,ソフトエレクトロニクス,センサー,アクチュエータで広く使用されています.
  • 従来のヒドロゲルは機械的な強度が低く,永久に壊れやすい.
  • 既存のヒドロゲルは ダイナミックなシグナルや 構造的な複雑性が欠けていて 機能的能力を制限しています

研究 の 目的:

  • ハイドロゲルの設計と工学の最近の進歩をレビューする.
  • 複数のスケールでヒドロゲルの特性を正確に操作するための戦略を強調する.
  • 機械的強度とダイナミック機能に焦点を当てて,従来のヒドロゲルの限界に対処します.

主な方法:

  • ハイドロゲル開発のための革新的な化学成分と組成物のレビュー.
  • ハイドロゲル設計におけるダイナミック・モジュール化技術の統合
  • ハイドロゲル性能の向上のための洗練されたアーキテクチャの探索.

主要な成果:

  • 合成ヒドロゲルは,従来のものと比較して,物理化学的性質が向上しています.
  • 新しいデザインは,機械的な強さを高め,壊れやすさを軽減し,ダイナミックな反応性を導入します.
  • 先進的なアーキテクチャは,構造的な複雑さとカスタマイズされた機能に寄与します.

結論:

  • 優れた性質を持つ水素ガスを設計する上で大きな進展がありました.
  • 化学,ダイナミック・モジュレーション,アーキテクチャを含む戦略は 限界を克服する鍵です.
  • これらのエンジニアリングされた水素ガスは,様々な分野における高度な応用の可能性を広げています.