Abstrakt
he paper deals with the analysis of deformation curve of the hair of different species and with determining of basic viscoelastic parameters thereof. From the data obtained authors come to interspecies differences of particular parameters, influencing of viscoelastic parameters' values by the pigmentation, and most importantly, they determine the dependence between the diameter and the Young's modulus of particular animal species.
Among the basic parameters evaluated in this work, hair diameter, Young's modulus in tension, yield strength, ultimate strength and fracture strain are discussed. Animal species studied include human (Homo sapiens sapiens), domestic cat (Felis silvestris f. catus), domestic dog (Canis lupus f. familiaris), ferret (Putorius putorius furo), Guinea pig (Cavia aperea f. porcellus), horse (Equus caballus f. caballus), domestic goat (Capra aegagrus hircus), domestic rabbit (Oryctolagus cuniculus f. domesticus), dromedary (Camelus dromedarius).
Essential findings are 1) black coloured pigmentation increases the Young's modulus, 2) outdoor breeding increases the hair diameter, 3) the value of hair diameter decreases with increasing Young's modulus. Minimum Young's modulus from the animal species studied has been found in domestic cat. (C) 2013 Czech University of Life Sciences Prague.