534 resultados para Silk.


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Goldsmiths'-Kress no. 23630.

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Mode of access: Internet.

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Work has 3 title-pages; 1st has at head of title: The cabinet cyclopædia. Conducted by the Rev. Dionysius Lardner ... Useful arts; 2d has at head of title: The cabinet of useful arts. Conducted by the Rev. Dionysius Lardner ...; 3d is engraved and has no series note.

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Bibliographical footnotes.

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This study provides comprehensive documentation of silk production in the pest moth Helicoverpa armigera from gland secretion to extrusion of silk thread. The structure of the silk glands, accessory structures and extrusion apparatus are reported. The general schema of the paired silk glands follows that found for Lepidoptera. Morphology of the duct, silk press, muscle attachments and spigot are presented as a three-dimensional reconstruction and the cuticular crescent-shaped profile of the silk press is demonstrated in both open and closed forms with attendant muscle blocks, allowing advances in our knowledge of how the silk press functions to regulate the extrusion of silk. Growth of the spigot across instars is documented showing a distinctive developmental pattern for this extrusion device. Its shape and structure are related to use and load-bearing activity. (c) 2005 Elsevier Ltd. All rights reserved.

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