Age related changes in the thermal transition of Turkey leg flexor tendon collagen |
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Authors: | A. Bigi P. P. Castellani G. Cojazzi N. Roveri |
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Affiliation: | (1) Dipartimento di Chimica G. Ciamician, Untversità di Bologna, Via Selmi 2, 40126 Bologna, Italy;(2) Istituto di Anatomia Umana Normale, Università di Bologna, Via Irnerio 49, 40126 Bologna, Italy;(3) Centro di Studio per la Fisica Delle Macromolecole, Dipartimento di Chimica G. Ciamician, Via Selmi 2, 40126 Bologna, Italy |
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Abstract: | A differential scanning calorimetric, thermogravimetric and electron microscopic investigation has been carried out on the uncalcified areas of turkey leg flexor tendon as a function of age. Rehydrated samples exhibit an increase of thermal stability with age. The HD values drop from about 11 cal·g–1 in the first weeks of life down to 7 cal·g–1 after the 11th week.At about 11 weeks, the collagen fibril diameter distribution passes from unimodal to multimodal. The DSC curves as well as the TG-DTG curves recorded from dried samples do not show any appreciable difference with ageing. The variations in thermal behaviour of rehydrated samples and fibril diameter distribution could be related to modifications in water binding with ageing.The Authors are grateful to Dr. G. Fabris for discussion and help in the selection of the samples. They also wish to thank Mr. G. Pizzuto for excellent technical assistance. The financial support by Consiglio Nazionale delle Ricerche is gratefully acknowledged. |
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Keywords: | ageing differential scanning calorimetry dynamic thermogravimetry electron microscopy tendon collagen |
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