Evolution articles within Polymer Journal

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• Original Article | 08 December 2010

  Evolution of spiders from nocturnal to diurnal gave spider silks mechanical resistance against UV irradiation

  Time dependencies of the mechanical breaking stress (BS) of draglines secreted by a diurnal Nephila clavata spider and a nocturnal Yaginumia sia spider. The draglines were irradiated with UV-A* rays, which were prepared by cutting wavelengths shorter than 320 nm from a xenon-arc lamp with special filters. ○: N. clavata, •: Y. sia. In this study, the normalized BS is used by dividing the observed values of BS by the initial value before UV-A* irradiation.

  • Shigeyoshi Osaki
  •  & Masao Osaki