Extracting conditions for megrim (Lepidorhombus boscii) skin collagen affect functional properties of the resulting gelatin

Abstract

The definitive version is available at www3.interscience.wiley.com ; Various procedures for extracting collagen and/or gelatin from megrim skins were compared on the basis of gelatin functional properties. It was possible to prepare a dry powder of soluble collagen with good viscoelastic and gelling properties, which can be converted into gelatin by dissolving at temperatures above 45 °C. Physical properties of gelatins are influenced more by extracting conditions than by imino acid composition. A high-quality, readily-dissolved gelatin was obtained from megrim skins using a pretreatment of the skins with NaCl and dilute NaOH, then swelling with 0.05 M acetic acid followed by an extraction step in water at 45 °C. ; This research was financed by the European Union under project FAIR CT97.3055 and by the Spanish comisión Interministerial de Ciencia y Tecnología under project ALI 98 1215 CE. ; Peer Reviewed