Vincent J F
Tissue Cell. 1981;13(4):831-53. doi: 10.1016/s0040-8166(81)80017-1.
The morphology of the extensible intersegmental membrane (i.s.m.) of the female Locusta migratoria migratorioides is dictated by three main requirements: (a) high extensibility (1500%), (b) low stiffness (5 X 10(3) Pa), (c) low Poisson ratio in the plane of the cuticle (0.01 or less). These requirements can be met only orientating the chitin orthogonally to the direction of extension and having the protein phase uncross-linked and of very low modulus. The Poisson ratio requirement also implies that for the material to be extended at constant volume extreme thinning must occur during extension, giving rise to high shear strains in the direction of extension. The ultrastructure and morphological elements are modified from 'normal' cuticle such as to provide for high extensibility (due to unfolding) of the epicuticle and epidermal cells and a complex system of intracuticular fibres which are probably necessary to retain the topology of the components during high shear straining. No new morphological elements are adduced in this study but the extreme adaptability of those established for other cuticles is illustrated.
雌性非洲沙漠蝗可伸展节间膜（i.s.m.）的形态由三个主要要求决定：（a）高伸展性（1500%），（b）低刚度（5×10³帕斯卡），（c）表皮平面内低泊松比（0.01或更低）。只有使几丁质与伸展方向正交，并使蛋白质相未交联且模量极低，才能满足这些要求。泊松比要求还意味着，为使材料在恒定体积下伸展，伸展过程中必须发生极端变薄，从而在伸展方向上产生高剪切应变。超微结构和形态学元素与“正常”表皮不同，以提供上表皮和表皮细胞的高伸展性（由于展开）以及表皮内纤维的复杂系统，在高剪切应变过程中，这些纤维可能对保持各组分的拓扑结构是必要的。本研究未提出新的形态学元素，但说明了为其他表皮所确立的那些元素的极端适应性。
