関連する実験動画
Updated: Jul 6, 2026

09:47
Microdissection of Black Widow Spider Silk-producing Glands
Published on: January 11, 2011
シルクワームの驚くべき強さ シルクシルク
Zhengzhong Shao1, Fritz Vollrath
1Department of Macromolecular Science and Key Laboratory of Polymer Engineering of Education Ministry, Fudan University, Shanghai 200433, China. zzshao@fudan.edu.cn
Nature
|August 16, 2002
まとめ
シルクワームのシルクシルクです.
科学分野:
- バイオマテリアル科学 バイオマテリアル科学
- 材料工学 材料工学とは
- 繊維科学 繊維科学 繊維科学
背景:
- スパイダー・ドラッグライン・シルクは,優れた天然繊維として認識されています.
- 商用シルクワームのは,一般的に蜘蛛のよりも弱く,伸縮性が低いと考えられています.
- クモ糸の"超繊維"の可能性は,生物模倣材料の研究にインスピレーションを与えてきました.
研究 の 目的:
- シルクワームの糸の機械的性質がクモのドラッグラインの糸と競合できるかどうかを調査する.
- シルクワームのシルク性能に対する制御されたリリング条件の影響を調査する.
- シルクワームのの振る舞いの修正が,シルク繊維の強さを高めることができるかどうかを判断する.
主な方法:
- 特定の環境条件下で,シルクワームのの制御された回転.
- リールされたの糸繊維の機械的試験.
- スパイダー・ドラッグライン・シルクデータとの引力強さと伸縮性の比較.
主要な成果:
- 制御された条件下で巻き上げられたシルクワームの糸は,蜘蛛のドラッグラインの糸に匹敵する機械的性質を示した.
- シルクワームのの強さと伸縮性の改善は,以前の仮定に異議を唱える.
- これらの強化された特性を達成するために,の遺伝子改変は必要ありませんでした.
結論:
- シルクワームのの機械的可能性は過小評価されており,最適化された加工によって大幅に改善できます.
- 制御されたリリングは,シルクワームのシルクの高性能能力を解き放つための重要な要因です.
- シルク繊維技術の将来の進歩は,優れたシルク生産のための遺伝子工学ではなく,行動操作に焦点を当てているかもしれません.
関連する概念動画
Globular and Fibrous Proteins
Many proteins can be classified into two distinct subtypes - globular or fibrous. These two types differ in their shapes and solubilities.
Globular proteins are also known as spheroproteins and typically are approximately round in shape. They contain a mix of amino acid types and contain differing sequences in their primary structures. Globular proteins have many different functions, such as enzymes, cellular messengers, and molecular transporters. These roles often require the proteins to be...
Globular proteins are also known as spheroproteins and typically are approximately round in shape. They contain a mix of amino acid types and contain differing sequences in their primary structures. Globular proteins have many different functions, such as enzymes, cellular messengers, and molecular transporters. These roles often require the proteins to be...
Strain and Elastic Modulus
The quantity that describes the deformation of a body under stress is known as strain. Strain is given as a fractional change in either length, volume, or geometry under tensile, volume (also known as bulk), or shear stress, respectively, and is a dimensionless quantity. The strain experienced by a body under tensile or compressive stress is called tensile or compressive strain, respectively. In contrast, the strain experienced under bulk stress and shear stress is known as volume and shear...
Strength of Cement
Strength tests for cement are not performed directly on neat cement paste due to difficulty in obtaining consistent, reliable specimens. Instead, cement is typically tested in the form of cement-sand mortar.
For compressive strength tests, ASTM C 109-05 standards prescribe a cement-sand mix ratio of 1:2.75 and a water/cement ratio of 0.485 for making 2-inch cubes. These cubes are mixed, cast, and cured in saturated lime water at 23°C until testing. Flexural strength testing, outlined in ASTM C...
For compressive strength tests, ASTM C 109-05 standards prescribe a cement-sand mix ratio of 1:2.75 and a water/cement ratio of 0.485 for making 2-inch cubes. These cubes are mixed, cast, and cured in saturated lime water at 23°C until testing. Flexural strength testing, outlined in ASTM C...
Tensile Strength Considerations of Concrete
Considering the tensile strength of concrete involves recognizing that the theoretical strength of cement paste can be up to a thousand times higher than what is observed in practical applications. This significant discrepancy is largely attributed to the presence of microscopic cracks within the concrete. These cracks tend to amplify stress at their tips when a load is applied, a phenomenon explained by Griffith's theory of brittle fracture.
The dimensions and shape of a concrete specimen also...
The dimensions and shape of a concrete specimen also...
Relation Between Tensile Strength and Compressive Strength of Concrete
Concrete is a fundamental building material, and understanding its strengths is crucial for construction projects. The relationship between its tensile and compressive strengths is intricate, showing that while these strengths are related, they do not increase at the same rate. Tensile strength's growth is slower and is affected by various factors such as the methods used for testing, the size and shape of the specimen, the texture of the aggregate used, and the moisture content of the concrete.
Impact Strength of Concrete
Impact strength in concrete is a critical measure that reflects the material's capability to endure the forces applied during pile driving and when supporting machinery foundations that experience impulsive loads. It is also essential when handling precast concrete components to prevent accidental damage. The impact strength is assessed by observing the concrete's resistance to repeated impacts and energy absorption capacity. A key indicator of significant damage to concrete is when it does not...

