干旱区生态环境知识资源中心(Arid): Repair of microdamage caused by cyclic loading in insect cuticle

Arid

DOI	10.1002/jez.2329
	Repair of microdamage caused by cyclic loading in insect cuticle
	O'; Neill, Maeve; Taylor, David
通讯作者	Taylor, David
来源期刊	JOURNAL OF EXPERIMENTAL ZOOLOGY PART A-ECOLOGICAL AND INTEGRATIVE PHYSIOLOGY
ISSN	2471-5638
EISSN	2471-5646
出版年	2020
卷号	333 期号:1 页码:20-28
英文摘要	It is well known that repeated loading cycles can reduce the strength of a material and cause eventual failure by the gradual build-up of damage. Previous work has shown that mammalian bone is able to extend its life almost indefinitely by continuously repairing microdamage, preventing the development of macroscopic cracks. However, no study has been conducted until now to investigate repair of microdamage in any other biological material. We applied cyclic bending loads to the hind tibiae of desert locusts (Schistocerca gregaria). We observed a significant decrease in the elastic stiffness (Young's modulus) of the cuticle during the five applied loading cycles, indicating that microdamage had been induced. The tibiae were then left to rest for various time periods: 1 hr, 24 hr, 1 week, and 4 weeks. When tested again after up to 24 hr, there was still a significant decrease in stiffness, showing that some microdamage remained. However, in the samples left for 1 week or 4 weeks before retesting, this decrease in stiffness had disappeared, indicating that the microdamage had been repaired. This is the first ever indication that insects are capable of repairing microdamage. It is a highly significant finding-insects such as locusts rely on the stiffness and strength of their hind legs for jumping. This study suggests that, within a time period of order of a few days, the insect can fully restore the mechanical function of an overloaded leg and thus return to normal activities.
英文关键词	cuticle damage insect repair stiffness strength
类型	Article
语种	英语
国家	Ireland
收录类别	SCI-E
WOS记录号	WOS:000492081600001
WOS类目	Zoology
WOS研究方向	Zoology
EI主题词	2019-10-24
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/310348
作者单位	Univ Dublin, Trinity Coll Dublin, Trinity Ctr Bioengn, Dublin, Ireland
推荐引用方式 GB/T 7714	O',Neill, Maeve,Taylor, David. Repair of microdamage caused by cyclic loading in insect cuticle[J],2020,333(1):20-28.
APA	O',Neill, Maeve,&Taylor, David.(2020).Repair of microdamage caused by cyclic loading in insect cuticle.JOURNAL OF EXPERIMENTAL ZOOLOGY PART A-ECOLOGICAL AND INTEGRATIVE PHYSIOLOGY,333(1),20-28.
MLA	O',et al."Repair of microdamage caused by cyclic loading in insect cuticle".JOURNAL OF EXPERIMENTAL ZOOLOGY PART A-ECOLOGICAL AND INTEGRATIVE PHYSIOLOGY 333.1(2020):20-28.