01214nas a2200193   4500000000100000000000100001008004100002260007000043100001400113700001800127700001600145700001500161700001300176245017800189300001100367490000800378520062000386022001401006       2008                            d  c03/2008bSchlütersche Verlagsgesellschaft mbH & Co. KGaHannover1 aV Apprich1 aC Hinterhofer1 aE Polsterer1 aJ Ferguson1 aC Stanek00aIs moisture really the most important influencing factor on the mechanical properties of claw horn? Modulus of elasticity and dry-matter content in flat and contracted claws  a95-1010 v1213 aThe modulus of elasticity (E) and dry matter content (DMC) of horn samples from two types of claw deformity (contracted and flat claws) were determined according to EN-ISO 527 and ASTM D 638-03. The overall E values for all segments combined were 168 ± 154 MPa (mean ± SD, n = 79) and 248 ± 196 (n = 90) for contracted and flat claws, respectively. These values were approximately 60 % and 40 % less than the E value of sound claw material. The high correlation between E and DMC, as previously found for sound claw horn material was not present in horn obtained from these types of pathologically altered claws.  a0005-9366