Collagen Isolation from Arctic Marine Organisms and Their Industrial Processing Wastes
Abstract
The results of the isolation of collagen hydrolysates from tissues of two Arctic marine organisms are presented. Extraction and use of marine organism collagen is a part of complex waste less processing of sea catches. Possible ways of preparing water-soluble collagen hydrolysates from different sources were studied. It is established that for preparing soluble collagen hydrolysate from skin of cod Gadus morhua acid hydrolysis in 0.3% acetic acid is suitable. Purification of solution by means of ultrafiltration gives a pure collagen hydrolysate with mass fraction of the main substance about 98%. Collagen of muscular skin bag of holothuria Molpadia borealis is almost insoluble in acid and alkali solutions. The major mass of collagen remains in an insoluble residue. The analysis of infrared spectrum transmission and chemical analysis of the general carbohydrates and collagen in different fractions showed that as a result of acid and alkaline processing of raw materials the glycosaminoglycans (GAG) and some quantity of collagen are extracted, their main quantity was determined in alkaline extracts. For extraction of soluble collagen from insoluble residue it is required enzymatic by pepsin in acidic medium. Properties of holothurian collagen and fish collagen are different. The preparation of water-soluble collagen derivatives requires using enzymatic hydrolysis.
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