• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>AoB PLANTS >Biaxial tensile tests identify epidermis and hypodermis as the main structural elements of sweet cherry skin
【24h】

Biaxial tensile tests identify epidermis and hypodermis as the main structural elements of sweet cherry skin

机译：双轴拉伸试验确定表皮和皮下组织为甜樱桃皮的主要结构元素

获取原文
       
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

The skin of developing soft and fleshy fruit is subjected to considerable growth stress, and failure of the skin is associated with impaired barrier properties in water transport and pathogen defence. The objectives were to establish a standardized, biaxial tensile test of the skin of soft and fleshy fruit and to use it to characterize and quantify mechanical properties of the sweet cherry (Prunus avium) fruit skin as a model. A segment of the exocarp (ES) comprising cuticle, epidermis, hypodermis and adhering flesh was mounted in the elastometer such that the in vivo strain was maintained. The ES was pressurized from the inner surface and the pressure and extent of associated bulging were recorded. Pressure : strain responses were almost linear up to the point of fracture, indicating that the modulus of elasticity was nearly constant. Abrading the cuticle decreased the fracture strain but had no effect on the fracture pressure. When pressure was held constant, bulging of the ES continued to increase. Strain relaxation upon releasing the pressure was complete and depended on time. Strains in longitudinal and latitudinal directions on the bulging ES did not differ significantly. Exocarp segments that released their in vivo strain before the test had higher fracture strains and lower moduli of elasticity. The results demonstrate that the cherry skin is isotropic in the tangential plane and exhibits elastic and viscoelastic behaviour. The epidermis and hypodermis, but not the cuticle, represent the structural ‘backbone' in a cherry skin. This test is useful in quantifying the mechanical properties of soft and fleshy fruit of a range of species under standardized conditions.
机译：发育中的软而多肉的水果的皮肤受到很大的生长压力，并且皮肤的衰竭与水运输和病原体防御的屏障性质受损有关。目的是建立一个柔软，多肉水果皮的标准化双轴拉伸试验，并用它来表征和量化作为模型的甜樱桃（Prunus avium）水果皮的机械性能。包含角质层，表皮，皮下组织和附着的果肉的外果皮（ES）的片段被安装在弹性仪中，从而维持体内菌株。从内表面向ES加压，并记录相关凸起的压力和程度。压力：直至断裂点，应变响应几乎都是线性的，这表明弹性模量几乎恒定。磨损表皮可降低骨折应变，但对骨折压力没有影响。当压力保持恒定时，ES的鼓胀继续增加。释放压力后应变松弛完成并且取决于时间。膨出的ES在纵向和横向上的菌株没有显着差异。在测试前释放体内应变的外果皮段具有较高的断裂应变和较低的弹性模量。结果表明，樱桃皮在切向平面上是各向同性的，并表现出弹性和粘弹性的行为。表皮和皮下组织，而不是表皮，代表樱桃皮中的结构“骨干”。该测试可用于量化标准化条件下一系列物种的软果肉果实的机械性能。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号