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J Exp Biol (2007) 210 (16): 2859–2865.
Published: 15 August 2007
... tree lizards( Urosaurus ornatus ) to test the hypothesis that CORT regulates the distribution of limiting resources between the reproductive and immune systems. To manipulate circulating concentrations of CORT we utilized a novel method of hormone implantation, in which a polymeric compound is mixed...
J Exp Biol (2006) 209 (13): 2452–2461.
Published: 1 July 2006
... the mechanical performance of this toolkit of silks for the silver garden spider Argiope argentata . Four silks exhibit viscoelastic behaviour typical of polymers, but differ statistically from each other by up to 250% in performance, giving each silk a distinctive suite of material properties. Major ampullate...
J Exp Biol (2005) 208 (10): 1937–1949.
Published: 15 May 2005
... affecting assembly of silk polymers( Madsen and Vollrath, 2000 ). A second possible explanation is that spiders can actively control the flow of the silk fiber through the major ampullate spigot using an internal friction brake. With such a mechanism, spiders may increase the amount of stress applied...