TY JOUR TI INVESTIGATION OF THE STRUCTURAL FEATURES OF COLLAGEN-CONTAINING MATERIALS WITH DIFFERENT DEGREES OF MATURITY KW COLLAGEN KW DEGREE OF MATURITY KW AVIAN DERMIS KW IR SPECTROSCOPY KW X-RAY STRUCTURAL ANALYSIS KW ELECTRON MICROSCOPY KW POROMETRY KW PRIMARY KW SECONDARY KW TERTIARY KW QUATERNARY STRUCTURE JO Herald of Technological University AU , .. AU , .. AU , .. AU , .. AU Chapaeva, L.V. AU Urusova, D.A. PY 2025 IS 27 PB Kazan National Research Technological University