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関連する概念動画

Indeterminate Structure01:18

Indeterminate Structure

Indeterminate structures refer to structures where internal forces and reactions cannot be determined using only the equations of static equilibrium.  Indeterminate structures have more unknown forces and reaction forces than equations of static equilibrium that can be used to determine them. Indeterminate structures are often used in engineering to create complex, efficient, and aesthetically pleasing structures. There are various types of indeterminate structures used in engineering and some...
Design Example: Distributing Reinforcements in Concrete Sections01:22

Design Example: Distributing Reinforcements in Concrete Sections

The topic explores the practical aspects of adjusting steel reinforcements within a concrete beam section to meet specific design requirements. When designing a reinforced concrete beam, it is essential to distribute the steel reinforcements properly to ensure structural integrity and efficiency. The example provided details a scenario where a beam requires a total steel cross-section of 4 square inches. The engineer identifies that the available steel bars have a nominal diameter of 1.693...
Placing Concrete01:17

Placing Concrete

The concrete is placed as close as possible to its final position to avoid segregation. The placed concrete is then fully compacted to expel the entrapped air, and the next layer of concrete is laid while the underlying layer is still in the plastic state. The rate at which concrete is placed and compacted is kept equal.
While placing concrete, care is taken to ensure that the concrete is laid in uniform layers, and hand shoveling and moving concrete using poker vibrators is avoided. Also,...
Preplaced Aggregate Concrete01:29

Preplaced Aggregate Concrete

Preplaced aggregate concrete is ideal for construction environments that are not easily accessible. The process begins by properly wetting the gap-graded coarse aggregates to remove the dirt, then placing it in the form and compacting it. Voids are filled with a mortar mix pumped under pressure through slotted pipes. This mortar typically consists of Portland cement, pozzolan, fine aggregates, water, and a fluidizing aid. The pozzolan helps reduce bleeding and segregation while improving the...
Design Example: Managing Concrete Workability01:14

Design Example: Managing Concrete Workability

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.
To address...
Design Example: Analyzing Capacity Contours for Flood Risk Assessment01:17

Design Example: Analyzing Capacity Contours for Flood Risk Assessment

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...

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Printing Thermoresponsive Reverse Molds for the Creation of Patterned Two-component Hydrogels for 3D Cell Culture
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組織工学における形状記憶ヒドロゲル:最近の進歩と課題

Abid Naeem1,2,3,4, Chengqun Yu5, Lili Zhou6

  • 1School of Life Science, School of Interdisciplinary Science, Aerospace Center Hospital, Key Laboratory of Molecular Medicine and Biotherapy, Key Laboratory of Medical Molecule Science and Pharmaceutics Engineering, Beijing Institute of Technology, Beijing, 100081, PR China.

Bioactive materials
|September 2, 2025
PubMed
まとめ
この要約は機械生成です。

形状記憶ヒドロゲル (SMH) は,形状回復能力により,組織工学における先進的なソリューションを提供します. このレビューは,既存の課題にもかかわらず,再生医療における設計,特性,およびアプリケーションを調査します.

キーワード:
3Dプリントでカスタマイズされたインプラント形状メモリヒドロゲルスマート・ドラッグ・デリバリーシステム軟組織の再建組織工学

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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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科学分野:

  • バイオマテリアル科学
  • 再生医療
  • 組織工学

背景:

  • 形状記憶ヒドロゲル (SMH) は,水性性,弾性,変形後の形状回復などのユニークな性質を持っています.
  • これらの特性により,生物医学,特に組織工学における様々な用途に非常に適しています.

研究 の 目的:

  • SMHの革新的な設計と合成を検証する.
  • 組織工学に関連する物理的,生物学的性質を強調する.
  • SMHの多様な応用と持続的な課題を探求する.

主な方法:

  • SMHの設計と合成に関する既存の文献のレビュー.
  • SMHの物理的および生物学的特徴の分析
  • 組織再生,薬物投与,インプラント製造における SMH 応用の検討

主要な成果:

  • SMHは調整可能な機械的特性,生物適合性,生物分解性を有する.
  • 主要な応用は骨,軟組織,血管,神経組織工学だけでなく,スマートな薬物投与と3Dプリントインプラントです.
  • 課題には,スケーラビリティ,プロパティの最適化,形状の固定,劣化制御,長期的な安定性が含まれています.

結論:

  • SMHは複雑な生物医学的な課題に 革新的な解決策を提示しています
  • 限界を克服し,臨床的可能性を高めるために,さらなる学際的な研究が不可欠です.
  • SMHは再生医療の進歩と 患者の成果の改善に役立つツールです