The Shrinkage Temperature of Collagen Fibres Isolated from the Tail Tendons of Rats of Various Ages and from Different Places of the Same Tendon

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Abstract
During the process of aging of collagen fibers from the tail tendons of rats (Ts) successively increases and is with 4-day-old rat fibers 58.0 C (TS incipiens), 60.0[degree]C (Ts melting) and 61.0[degree] (Ts finale) and with 250-day-old rat fibers 63.0, 64.5, and 69.5[degree]C. During the examination of Ts variation in the course of the same collagen fiber the variability of Ts values is greater than of Ts examinedin the same parts of various fibers. Ts of collagen fibers isolated from three different ''parts of the tail tendon increases in the direction towards the proximal part of the tail.