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Characteristics of protein fractions generated from hydrolysed cod (Gadus morhua) by-products

Paper ID Volume ID Publish Year Pages File Format Full-Text
36681 45142 2005 13 PDF Available
Title
Characteristics of protein fractions generated from hydrolysed cod (Gadus morhua) by-products
Abstract

The aim of this work was to study how raw material mixtures combined from different separated cod (Gadus morhua) by-products influenced the composition of the substrate for hydrolysis. The influence of using an endo-peptidase (Flavourzyme) or exo-peptidase (Neutrase) and the amount of added water on yield, nutritional, physicochemical and functional properties of the hydrolysis products was also studied. All freeze-dried fish protein hydrolysates (FPH) powders had a light yellow colour and contained 75–92% protein. The dried insoluble material, sludge, was a grey, greasy powder containing 55–70% protein. Degree of hydrolysis was 18.5–33.7% for FPH and 4.3–10.9% for sludge. Different ways of combining fish by-products lead to different end products with different properties after hydrolysis. Raw material containing the highest amount of lipids gave the lowest percentage of solubilised proteins. Addition of water before hydrolysis was more important than the type of enzyme used for yield, biochemical and functional properties of FPH and sludge. Protein efficiency ratio (PER) of sludge was generally 1.5 times higher than PER value of FPH. Sludge made up a large part after hydrolysis compared to fish protein hydrolysate, contained a significant part of the total protein and had good functional properties, in some cases even better than the FPH, which is often considered the main product of protein hydrolysis.

Keywords
Cod; By-products; Enzymatic hydrolysis; Functionality; FPH; Sludge
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Characteristics of protein fractions generated from hydrolysed cod (Gadus morhua) by-products
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Publisher
Database: Elsevier - ScienceDirect
Journal: Process Biochemistry - Volume 40, Issue 6, May 2005, Pages 2021–2033
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Bioengineering
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
Online Support
Any Questions? feel free to contact us