The study examines the influence of artificial aging on the stability of collagen within the parchments. Aging of the parchments was generated by heating at 70°C in a dry oven for 72 h as well as by keeping the parchment samples in the solution of artificial sweat. Sodium dodecyl sulfate polyacrylamide gel electrophoresis and size-exclusion chromatography were utilised to investigate the state of proteins within the parchment samples after exposure to heating and artificial sweat. The study has shown that the accelerated aging of the parchment results in marked change of protein and peptide concentrations, release of collagen chains, as well as leads to the alteration in the peptide compositions. KEY WORDS: parchment, collagen, accelerated aging, electrophoresis, chromatography STAREA COLAGENULUI DIN PERGAMENT SUB INFLUENŢA ÎMBĂTRÂNIRII ARTIFICIALE REZUMAT. Studiul examinează influenţa îmbătrânirii artificiale asupra stabilităţii colagenului din pergamente. Pergamentele au fost îmbătrânite prin încălzirea la 70°C într-un cuptor uscat timp de 72 de ore, precum şi prin menţinerea probelor de pergament în soluţia de transpiraţie artificială. S-au utilizat electroforeza în gel de dodecil sulfat de sodiu-poliacrilamidă şi cromatografia de excludere a mărimii pentru a investiga starea proteinelor din probele de pergament după expunerea la încălzire şi transpiraţie artificială. Studiul a arătat că îmbătrânirea accelerată a pergamentului are ca rezultat o schimbare vizibilă a concentraţiilor de proteine şi peptide, eliberarea lanţurilor de colagen, precum şi modificarea compoziţiilor peptidice. CUVINTE CHEIE: pergament, colagen, îmbătrânire accelerată, electroforeză, cromatografie L'ETAT DE COLLAGENE DANS LE PARCHEMIN SOUS L'INFLUENCE DU VIEILLISSEMENT ARTIFICIEL RÉSUMÉ. L'étude examine l'influence du vieillissement artificiel sur la stabilité du collagène dans les parchemins. Les parchemins ont été vieillis par chauffage à 70°C dans un four sec pendant 72 heures, ainsi que par conservation des échantillons de parchemin dans la solution de transpiration artificielle. L'électrophorèse en gel de polyacrylamide contenant du dodécysulfate de sodium et la chromatographie d'exclusion stérique ont été utilisées pour étudier l'état des protéines dans des échantillons de parchemin après une exposition au chauffage et à la transpiration artificielle. L'étude a montré que le vieillissement accéléré du parchemin entraînait un changement visible des concentrations de protéines et de peptides, la libération de chaînes de collagène et une modification des compositions de peptides. MOTS CLÉS: parchemin, collagène, vieillissement accéléré, électrophorèse, chromatographie
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