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相关概念视频

Reticular Dermis01:15

Reticular Dermis

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The papillary and reticular dermis are the two layers of the dermis. They are made of connective tissue with fibers of collagen extending from one to the other, making the border between the two somewhat indistinct. The dermal papillae extending into the epidermis belong to the papillary layer, whereas the dense collagen fiber bundles below belong to the reticular layer.
Reticular Layer
Underlying the papillary layer is the much thicker reticular layer, composed of dense, irregular connective...
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Fibrous Proteins00:55

Fibrous Proteins

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Fibrous proteins are either long and narrow proteins or assemble to form long and thin structures. They contain repetitive units and usually consist of either alpha helices or beta sheets and, in rare cases, a mix of both. The amino acids in the primary structure often consist of repeating amino acid sequences. The role of fibrous proteins is primarily structural. Many are located in the extracellular matrix and are present in connective tissues to impart strength and joint mobility. They are...
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相关实验视频

Updated: May 6, 2026

Designing Silk-silk Protein Alloy Materials for Biomedical Applications
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酶修饰的含有DOPA的丝纤维蛋白生物粘合剂具有动态交叉连接特性.

Yurong Tan1,2, Haopeng Li1, Xiao Han3

  • 1Mechano-X Institute, Applied Mechanics Laboratory, Department of Engineering Mechanics, Tsinghua University, Beijing 100084, China.

ACS applied materials & interfaces
|February 19, 2026
PubMed
概括

研究人员使用酶交叉连接策略开发了一种新的基于丝的水凝. 这种生物粘合剂为先进的生物电子应用提供快速凝,强粘合和自我愈合.

关键词:
动态交叉连接 动态交叉连接人机界面的人机界面皮肤间歇液体 皮肤间歇液体再组合型铁酶的使用.丝纤维蛋白生物粘合剂

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科学领域:

  • 生物材料科学 生物材料科学
  • 聚合物化学 聚合物化学
  • 生物电子学 生物电子学

背景情况:

  • 丝纤维素 (SF) 水凝与同时快速凝,机械强度,自我愈合和对表皮生物电子的粘合力作斗争.
  • 目前的局限性来自于低效的交叉连接和缺乏活跃的粘合成分.

研究的目的:

  • 开发高性能,全丝生物粘合剂,使用酶动态交叉链接策略.
  • 克服传统的SF水凝的局限性,用于先进的生物电子接口.

主要方法:

  • 为了在SF中改进DOPA转化,进行了工程类氨酶 (TYR) 选择.
  • 利用pH触发的Fe3+协调来实现动态交叉链接.
  • 为机械性能,粘附性和自我愈合而制造和特征化丝基水凝.

主要成果:

  • 与商业酶相比,鉴定了一种具有6.8倍高的DOPA转化产率 (2.7mol%) 的细菌氨酶.
  • 形成的水凝具有可调节的机械性能 (3-13 kPa模量,>250%应变) 和高粘附性 (18-40 kPa).
  • 证明了出色的自我愈合能力,生物相容性,并成功地集成到可穿戴的汗液传感器中.

结论:

  • 建立了一个可通用的酶策略,用于创建基于纯蛋白质的动态水凝.
  • 开发的生物粘合剂适用于先进的生物接口,包括表皮生物电子和可穿戴传感器.
  • 这种方法可以设计具有定制性质的高性能丝生物材料.