Interferometric measurements of bovine bone and tendon show that the values of the piezoelectric strain constant d14 decrease with hydration from the dry values of 0.2 X 10(-14) and 2.0 X 10(-14) m/V, respectively. The decrease of piezoelectricity in tendon is exponential with a characteristic hydration of 7% by weight from which an upper limit of the average molecular weight of the responsible electric dipole moments is deduced. The piezoelectricity in bone decreases relatively slowly with hydration indicating that the electric dipoles in bone collagen are subject to a different cancelling mechanism.
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机译：牛骨和肌腱的干涉测量结果表明，压电应变常数d14的值随水合而从0.2 X 10（-14）和2.0 X 10（-14）m / V的干燥值开始降低。肌腱中压电性的下降是指数性的，其特征在于水合为7％（重量），由此推论出有效电偶极矩的平均分子量的上限。骨中的压电性随水合作用而相对缓慢地降低，这表明骨胶原中的电偶极子受到不同的消除机制。
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