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A previous study has not revealed the participation of a mucous component in the cocoon wall of the solitary bee, Lithurgus chrysurus, differing from the cocoon structure reported for many other bee species. However, uncertainty remains, because only the median and rear zones of this cocoon type have thus far been analyzed. Here, we studied the front zone of this cocoon, searching its components and...
Silkworm cocoons are natural polymer fibre composites made from silk fibres and sericin binder. While silk is an interesting natural material per se, an understanding of the role of silk within one of its main functional applications in silkworm cocoons will provide inspiration and tools for the design of new artificial silk composites. Here, we describe in some detail the structure and morphology...
The spider species Trogloneta granulum, which in the wild lives inside scree slopes, builds three-dimensional orb webs. During egg-laying and egg sac building, the females stay with their dorsa down at the central part of the web. In this process, the hub is used as a platform. The threads of the hub are not incorporated into the silk cover of the egg sac. The silk wall of the egg sac is very thin,...
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