%0 Journal Article %T INVESTIGATION OF THE STRUCTURAL FEATURES OF COLLAGEN-CONTAINING MATERIALS WITH DIFFERENT DEGREES OF MATURITY %A , .. %A , .. %A , .. %A , .. %A Chapaeva, L.V. %A Urusova, D.A. %K COLLAGEN, DEGREE OF MATURITY, AVIAN DERMIS, IR SPECTROSCOPY, X-RAY STRUCTURAL ANALYSIS, ELECTRON MICROSCOPY, POROMETRY, PRIMARY, SECONDARY, TERTIARY, QUATERNARY STRUCTURE %J Herald of Technological University %D 2025 %N 27 %P 4 %I Kazan National Research Technological University