Reports

Values from waste / By-products in value

Published:

29/11/2016

Authors:

Oddvar Ottesen, Jón Árnason, Birgir Örn Smárason, Nonna Zhuravleva, Rannveig Björnsdóttir

Supported by:

Nordregio

contact

Jón Árnason

Project Manager

jon.arnason@matis.is

Values from waste / By-products in value

The report describes the first results of a technology transfer project for development and innovation in the production of value-added products from underutilized by-products of fish processing in three different areas, ie. Northern Iceland, Northern Norway and Northwest Russia. The project was a joint effort of researchers and developers as well as the fishing industry in the areas. The report provides an insight into the amount of unused products in the area. In addition, it discusses the utilization of three unused raw materials, blood, oats and eyes, and their possible utilization as bioactive substances, including feed for fish and other uses.

The report describes first results of work on technology transfer for development and innovation for production of value added products from underutilized by-products of fish production and processing in three different areas ie Northern Iceland, Northern Norway and North Western Russia. The project is a joint effort of research and development entities and fish processing industries in the above mentioned areas. The report gives an overview on availability of underutilized by-products in the area. In addition, possible ways of utilizing three different by products, fish blood, fish testes and fish eye compounds, and how they might be used as bioactive compounds into specialty feeds for aquaculture and other possible products.

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Reports

Gold in the fists of Ægis / Antioxidants from Icelandic marine sources

Published:

01/05/2010

Authors:

Rósa Jónsdóttir, Patricia Hamaguchi, Guðrún Ólafsdóttir, Tao Wang

Supported by:

AVS R&D Fund of Ministry of Fisheries in Iceland

contact

Rósa Jónsdóttir

Group Leader

rosa.jonsdottir@matis.is

Gold in the fists of Ægis / Antioxidants from Icelandic marine sources

The purpose of this project was to screen for anti-corrosive substances from Icelandic seafood such as algae, capelin and sagebrush, to be used as a food additive, target food or as a dietary supplement. Particular attention was paid to the possible use of polyphenols from algae as natural antioxidants to prevent the development of fish products and fish muscle proteins (isolates). This was done by screening for antioxidant activity with several types of antioxidant tests. The most promising antioxidant was chosen to better study its antioxidant properties in food models, i.e. washed cod muscle system, cod protein system and in fish burgers. The results showed, among other things, that polyphenols from the seaweed (Fucus vesiculosus) have high antioxidant properties and are promising for use as a dietary supplement or in food to promote greater stability, taste and nutritional value.

The aim of this project was to explore the natural antioxidant activity of marine sources like seaweed, capelin and cod spleen to use as food additives, functional ingredients or nutritional supplements. The potential application of algal polyphenols as novel natural antioxidants to prevent lipid oxidation of fish muscle and fish protein based products was of special interest. This was done by screening for antioxidant activity using different types of antioxidant assays. The most promising antioxidants were selected and their antioxidant properties studied further in fish model systems and fish patties. The results showed that phlorotannins isolated from bladderwrack (Fucus vesiculosus) had very high antioxidant properties and has a potential as nutritional supplements or food additive to enhance oxidative stability, flavor quality and nutritional value.

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