Weiss Ingrid M, Schmitt Karl P, Kirchner Helmut O K
INM-Leibniz Institute for New Materials gGmbH (Biomineralization Group), Saarbruecken, Germany.
J Exp Zool A Ecol Genet Physiol. 2011 Jun 1;315(5):266-73. doi: 10.1002/jez.671. Epub 2011 Mar 14.
Thermal activation analysis of plastic deformation of peacock tail feathers, by temperature changes and stress relaxation, gave for the keratin cortex an activation enthalpy of 1.78 ± 0.89 eV and an activation volume of 0.83 ± 0.13 nm³, for both the blue and the white subspecies. These values suggest that breaking of electrostatic bonds is responsible for plasticity in feather keratin. These might be bonds between keratin and nonkeratinous matrix or keratin-keratin cross-links. The mechanical properties of the rachis cortex are surprisingly uniform along the length of the feathers.
通过温度变化和应力松弛对孔雀尾羽塑性变形进行的热激活分析表明，对于蓝色和白色亚种，角蛋白皮质的激活焓为1.78±0.89电子伏特，激活体积为0.83±0.13立方纳米。这些值表明，静电键的断裂是羽毛角蛋白可塑性的原因。这些键可能是角蛋白与非角蛋白基质之间的键或角蛋白-角蛋白交联键。羽轴皮质的力学性能在羽毛长度上惊人地一致。
