scholarly journals Spiral and web asymmetry in the orb webs of Araneus diadematus (Araneae: Araneidae)

2011 ◽  
Vol 39 (2) ◽  
pp. 358-362 ◽  
Author(s):  
Samuel Zschokke
Keyword(s):  
Araneus Diadematus ◽  
Web Asymmetry

scholarly journals Design features of the orb web of the spider, Araneus diadematus

1994 ◽  
Vol 5 (3) ◽  
pp. 280-287 ◽  
Author(s):  
Alun ap Rhisiart ◽  
Fritz Vollrath
Keyword(s):  
Design Features ◽  
Orb Web ◽  
Araneus Diadematus

The mechanical design of spider silks: from fibroin sequence to mechanical function

1999 ◽  
Vol 202 (23) ◽  
pp. 3295-3303 ◽  
Author(s):  
J.M. Gosline ◽  
P.A. Guerette ◽  
C.S. Ortlepp ◽  
K.N. Savage
Keyword(s):  
Mechanical Design ◽  
Polymer Network ◽  
Nephila Clavipes ◽  
Structure Property ◽  
Structure Property Relationships ◽  
Clear Link ◽  
Silk Fibroins ◽  
Araneus Diadematus ◽  
Spider Silks ◽  
Β Sheet

Spiders produce a variety of silks, and the cloning of genes for silk fibroins reveals a clear link between protein sequence and structure-property relationships. The fibroins produced in the spider's major ampullate (MA) gland, which forms the dragline and web frame, contain multiple repeats of motifs that include an 8–10 residue long poly-alanine block and a 24–35 residue long glycine-rich block. When fibroins are spun into fibres, the poly-alanine blocks form (β)-sheet crystals that crosslink the fibroins into a polymer network with great stiffness, strength and toughness. As illustrated by a comparison of MA silks from Araneus diadematus and Nephila clavipes, variation in fibroin sequence and properties between spider species provides the opportunity to investigate the design of these remarkable biomaterials.

Mass predicts web asymmetry in Nephila spiders

2010 ◽  
Vol 97 (12) ◽  
pp. 1097-1105 ◽  
Author(s):  
Matjaž Kuntner ◽  
Matjaž Gregorič ◽  
Daiqin Li
Keyword(s):  
Web Asymmetry

The effect of prey type on the geometry of the capture web of Araneus diadematus

1998 ◽  
Vol 85 (8) ◽  
pp. 391-394 ◽  
Author(s):  
Jutta M. Schneider ◽  
Fritz Vollrath
Keyword(s):  
Prey Type ◽  
Araneus Diadematus

Multiaxial anisotropy of spider (Araneus diadematus) cocoon silk fibres

Polymer ◽  
2001 ◽  
Vol 42 (13) ◽  
pp. 5797-5800 ◽  
Author(s):  
J.Y.J. Barghout ◽  
J.T. Czernuszka ◽  
C. Viney
Keyword(s):  
Araneus Diadematus

Regulation of external respiration by the book-lung spiracles of the spiders, Araneus diadematus Clerck and A. marmoreus Clerck

1969 ◽  
Vol 47 (3) ◽  
pp. 355-364 ◽  
Author(s):  
G. L. Robinson ◽  
U. Paim
Keyword(s):  
External Respiration ◽  
Continuous Release ◽  
Ambient Concentrations ◽  
Araneus Diadematus

Recordings were made of the movements of the valves of the book-lung spiracles of Araneus diadematus Clerck and A. marmoreus Clerck. The slit-like spiracles of quiescent spiders were usually almost closed, but opened widely whenever the spiders moved. Respirometry indicated that CO2, retained in the spiders while the spiracles were closed, was released in bursts when the spiracles opened. High ambient concentrations of CO2 as well as lack of O2 caused spiracular opening and continuous release of CO2 from the spiders. It is suggested that CO2 elicits, whereas O2 inhibits, spiracular opening.

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