Reports

Product development of healthier processed meat products

Published:

01/08/2009

Authors:

Aðalheiður Ólafsdóttir, Ólafur Reykdal, Óli Þór Hilmarsson, Gunnþórunn Einarsdóttir, Kolbrún Sveinsdóttir, Þóra Valsdóttir, Emilia Martinsdóttir, Guðjón Þorkelsson

Supported by:

Technology Development Fund, Agricultural Productivity Fund

Contact

Aðalheiður Ólafsdóttir

Sensory evaluation manager

adalheiduro@matis.is

Product development of healthier processed meat products

The goal of the "Healthy Meat Products" project was to develop healthier ready-made meat products with less salt and hard fats. In the product development process, sensory evaluation was used to assess the sensory quality of the products and consumer surveys to check how consumers liked the product. Consumer surveys were conducted both at home and at work. The results of sensory evaluation and consumer surveys were used to decide on changes in the production process to adapt the products to consumer tastes. Microbial and chemical measurements were performed to monitor the shelf life and chemical content of the products. Consumption habits of processed meat products and attitudes towards low-fat and low-salt meat products were studied. The project succeeded in producing fat- and salt-reduced products from three product categories: new meat products, pre-fried meat products and cold cuts. One of those products is now ready for the market. The new product received very good reviews from consumers and even better than the product that was on the market. The other two products have come a long way in product development and the company now has the knowledge and experience to complete that product development and continue with the development of such products. Consumers are generally positive about fat reduction in meat products. However, there is a difference in their answers depending on which product is involved and there is also a difference between the sexes. The vast majority consider low-fat meat products to be healthier than products with a traditional fat content. For consumers, the most important thing is that the product is tasty. Price is also important, but less so. Consumers often make the same quality demands on low-fat and traditional products. Consumers care about the hygiene of meat products but are not willing to replace the taste quality with hygiene. There was a difference in the attitudes of men and women. Women think more about healthy food than men and are more positive about low-fat meat products. They are also more likely to buy low-fat meat products. Women rather than men check whether the product is environmentally friendly. Package information is important. About two-thirds of consumers say they look at fat content when choosing meat products. About half of consumers look at the amount of salt, so it seems that most people care less about the amount of fat. Care must be taken with the labeling and content description of salt and low-fat meat products, as this affects consumers' choices and expectations.

The aim of the project was to develop healthier processed meat products with lower salt and fat content. In the production development process, the sensory attributes of the prototypes were evaluated by a trained sensory panel. Consumer tests were conducted to study the consumer liking of the products. The consumer tests were done in different settings as central location tests and in-home tests. The results from the sensory evaluation and the consumer test were used to make decisions on the next steps in the product development. Microbiological and chemical analysis was performed to estimate the storage life and nutritional status of the products. The consumption pattern and consumer attitudes towards processed meat products with reduced fat- and salt content were studied. In the project the product development of three products in different product categories was successful. One of the products is ready for marketing and consumer tests indicated better liking of this new prototype than of the traditional one. The two other products need further development and the company now has the competence and experience to finalize the development. Consumers are generally in favor of fat-reduced meat products but there is a gender difference and a difference towards different product categories. Most of the consumers believe that fat-reducing meat products are healthier than traditional products. The taste is most important to most consumers and the price is also important. The consumers make the same demands to quality of fat-reduced food as other food. Consumers find the healthiness of food important, but not as important as the taste. Women are more aware of the healthiness of food and they are more positive towards fat-reduce meat products. They are more likely to buy fat reduced food and more aware of environmentally friendly food. The information on the packaging is important. Two thirds of consumers look for the fat content on the food label of the product they buy, but only half of them look at the salt content. Labeling and packaging information is very important as it affects the choice and expectations of the consumers.

Report closed until 01-10-2012

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Reports

Measurements of trace metals in salt, salted fish and insoluble particles in diagnosis of the source of yellow discoloration in salted fish - carried out February to May 2009

Published:

01/08/2009

Authors:

Sigurjón Arason, Hrönn Ólína Jörundsdóttir, Einar Lárusson, Helga Gunnlaugsdóttir

Contact

Sigurjón Arason

Chief Engineer

sigurjon.arason@matis.is

Measurements of trace metals in salt, salted fish and insoluble particles in diagnosis of the source of yellow discoloration in salted fish - carried out February to May 2009

Recently, there has been an unusual amount of yellow in salted fish meat, which reduces the quality and value of the production. Salted fish producers have suffered significant financial losses as a result. Salted fish, brine and foreign salt particles were analyzed for iron (Fe), cadmium (Cd), cobalt (Co), copper (Cu), nickel (Ni), zinc (Zn) and manganese (Mn) to identify the cause. vandans. The concentration of metal was higher in yellow spots of salted fish than in white flesh, and a considerably higher amount of metal was found in brine, which caused yellow compared to other brines. Large amounts of metals were found in salt dust, which means that the dust can affect the formation of yellow spots in salted fish.

Recently several cases of yellow discoloration in salted cod have appeared. This yellow discoloration / yellow spots decreases the quality and value of the product and causes a significant financial damage for the producers. Salted cod, brine and insoluble particles from the salt were analyzed for iron (Fe), cadmium (Cd), cobalt (Co), copper (Cu), nickel (Ni), zinc (Zn) and manganese (Mn) to investigate the cause of the problem. Metal concentration was higher in yellow spots from the salted cod compared to the white flesh of the cod. The metal concentration was also higher in brine that caused yellow discoloration compared to other brine. Considerable amount of metals were detected in insoluble dust particles from salt indicating that it might be the cause for the yellow discoloration in salted cod.

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Reports

The effect of different cooling techniques and temperature fluctuations on the storage life of cod fillets (Gadus morhua)

Published:

01/08/2009

Authors:

Hannes Magnússon, Hélène L. Lauzon, Kolbrún Sveinsdóttir, Björn Margeirsson, Eyjólfur Reynisson, Árni Rafn Rúnarsson, María Guðjónsdóttir, Kristín Anna Þórarinsdóttir, Sigurjón Arason, Emilía Martinsdóttir

Supported by:

AVS R&D Fund of Ministry of Fisheries in Iceland, the Technology Development Fund at the Icelandic Center for Research and EU (contract FP6-016333-2)

Contact

Kolbrún Sveinsdóttir

Project Manager

kolbrun.sveinsdottir@matis.is

The effect of different cooling techniques and temperature fluctuations on the storage life of cod fillets (Gadus morhua)

The purpose of the experiments was to examine two refrigerants on board a fishing vessel, to use different refrigeration techniques during processing, including so-called CBC (combined blast and contact) refrigeration and to examine the effect of temperature fluctuations during storage compared to continuous storage at -1 ° C. There was little difference in microbial and chemical measurements, whether plate ice or liquid ice was used for processing, but according to sensory evaluation, the group that was cooled with liquid ice had one day longer freshness and shelf life. The temperature was usually slightly higher in the group as plate ice was used for processing during the storage period. According to sensory evaluation, microbial counts and chemical measurements, CBC cooling proved to be the best for prolonging freshness and shelf life. Temperatures were found to be lower in the groups where CBC cooling was used. The number of microorganisms was similar in the two groups where CBC cooling was not used in the processing (liquid cooling and no cooling). These results were consistent with the results of sensory evaluation. TMA levels were slightly higher on storage days 12-19 in the liquid-cooled group. The results of temperature measurements during the storage period were similar. A similar number of microorganisms were found to be in groups stored at a constant temperature (about -1 ° C) on the one hand and in groups where temperature fluctuations were applied during the first part of the storage period on the other hand. During the first 15 days of storage, TVB-N and TMA values were found to be similar in the groups. The groups stored at a constant temperature did not undergo sensory evaluation. Microbial assays performed by the fast-acting method qPCR were in good agreement with culture methods for Pseudomonas spp. and Photobacterium phosphoreum.

The purpose of this experiment was to examine two different cooling methods on board fishing vessel, to apply different cooling techniques during processing at fish plant including the CBC (combined blast and contact) cooling and to compare storage of packed cod fillets kept either at steady temperature (-1 ° C) or below temperature fluctuations. No marked difference was seen in microbial and chemical measurements whether plate ice or liquid ice was used prior to filleting but according to sensory analysis, the experimental group where liquid ice was used had one day extension in freshness and shelf life compared to the group with plate ice. Temperature was usually slightly higher in the plate ice group than the liquid ice group during storage. According to sensory, microbiological and chemical analysis, the CBC cooling clearly resulted in longer freshness period and shelf life extension in comparison to the two groups where this technique was not applied during processing. Temperature was lower in these groups during the storage period. Similar microbial counts were found between the two experimental groups where CBC was not applied during processing (liquid cooling and no cooling). These results were in agreement with results from sensory analysis. TMA values were however higher on storage days 12 to 19 in the group with liquid cooling. Temperature measurements during storage of these two groups were very similar. No marked difference was seen in microbial counts between groups that were stored at a constant temperature around -1 ° C compared to groups where temperature fluctuations were used during early phases of storage. During the first 15 days of storage, TVB-N and TMA values were very similar for these groups. Sensory analysis was not done on the two groups kept at -1 ° C. The rapid qPCR analysis was generally in good agreement with the cultivation methods for Pseudomonas spp. and Photobacterium phosphoreum.

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Reports

Pollution monitoring in the marine environment around Iceland 2007 and 2008 / Monitoring of the marine biosphere around Iceland 2007 and 2008

Published:

01/08/2009

Authors:

Hrönn Ólína Jörundsdóttir, Sasan Rabieh, Hulda Soffía Jónasdóttir, Þuríður Ragnarsdóttir, Helga Gunnlaugsdóttir

Supported by:

Ministry for the Environment and Ministry of Fisheries

Pollution monitoring in the marine environment around Iceland 2007 and 2008 / Monitoring of the marine biosphere around Iceland 2007 and 2008

This report presents the results of the Ministry of the Environment's annual monitoring project for the years 2007 and 2008. The aim of this monitoring is to fulfill Iceland's obligations regarding the Oslo and Paris Agreement (OSPAR), as well as the AMAP (Artic Monitoring Assessment Program). The data has been sent to the International Council for the Exploration of the Sea (ICES) database. The Marine Research Institute collects samples and Matís oversees the preparation of samples and measurements of trace elements in the marine environment. The samples are measured at Matís and at the Laboratory of Pharmacology and Toxicology. Various inorganic trace elements and chloro-organic substances were measured in cod caught in Hafró's annual spring rally in March 2008 and in mussels collected at 11 locations around the country in August / September 2007. Monitoring in the marine environment around Iceland began in 1989 and data are collected in database, the report provides overview images for some of the materials monitored.

This report contains results of the annual monitoring of the biosphere around Iceland in 2007 and 2008. The project, overseen by the Environmental and Food Agency of Iceland, is to fulfill the OSPAR (Oslo and Paris agreement) and AMAP (Arctic Monitoring Assessment Program) agreements. The data has been submitted to the ICES databank (ices.dk), collection of data began 1989. Matís ohf is the coordinator for marine biota monitoring and is responsible for methods relating to sampling, preparation and analysis of samples. The samples were analyzed at the Matís and at the Department of Pharmacology and Toxicology at the University of Iceland. Trace metals and organochlorines were analyzed in cod (Gadus morhua) caught in March 2008 and in blue mussel (Mytilus edulis) collected in August / Sept 2007. Marine monitoring began in Iceland 1989.

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Reports

Grazing on Angelica archangelica and flavor of lamb meat / Grazing on Angelica archangelica and flavor of lamb meat

Published:

01/07/2009

Authors:

Guðjón Þorkelsson, Rósa Jónsdóttir, Aðalheiður Ólafsdóttir, Óli Þór Hilmarsson

Supported by:

National Association of Sheep Farmers

Contact

Guðjón Þorkelsson

Strategic Scientist

gudjon.thorkelsson@matis.is

Grazing on Angelica archangelica and flavor of lamb meat / Grazing on Angelica archangelica and flavor of lamb meat

The effect of grazing on angelica on volatile substances, fatty acids, odor and taste of heated lamb was studied. 18 lambs were divided into three equal groups. One was on a traditional pasture, another was 3 weeks and a third 6 weeks before slaughter on a pasture where angelica was predominant. The lambs were 120-140 days old at slaughter. A graphical test, Quantitative Descriptive Analysis (QDA) was used to describe the sensory properties of heated vertebral muscle with surface fat. Volatile fragrances were isolated from aggregate vertebral muscle samples with fat from all three groups and measured on a gas mass spectrometer (GC-MS) to obtain the mass spectra of the substances and thus identify them. Gas chromatography olfactometry (GC-O), based on the odor of substances as they emerge from the gas column, was used to identify odoriferous substances which may be in very small quantities but produce characteristic odors. Fatty acids were measured by gas analysis. The statistical method ANOVA (GLM - General Linear Model) and Duncan`s tests were used to analyze whether experimental groups differed in terms of sensory assessment factors and odorants. Experimental group sensory symptoms were examined by Principal Component Analysis (PCA). The partial least square regression analysis (PLSR) was performed. The model had volatile substances and fatty acids as control variables (X-variables) and statistically significant sensory evaluation factors as response variables (Y-variables). Most of the variability in sensory evaluation results could be explained by whether or not the lambs were on angelica. The meat of lamb angelica had a spicy odor and spice flavor associated with high levels of αpinene, β-phellandrene and octanal and C18: 1 and C18: 2 fatty acids but lamb meat on a traditional pasture had a lamb and wool odor and generally stronger odor and flavor associated with 2-butanone, 3-methyl-3-buten-1-ol and 3-hydroxy-2-butanone and saturated fatty acids. The time spent on angelica explained only the 4.6% variability. The results indicate that special terpenoids i.e. β-phellandrene and α-pinene are characteristic of the meat of lambs that have been on angelica. The results of the project strongly suggest that grazing angelica in the last weeks before slaughter changes the taste of lamb. The study confirms that angelica meat is unique. This feature can then be used in the marketing of the meat.

The influence of finishing traditional grazing lambs on fields of Angelica archangelica on volatile compounds, fatty acids and odor and flavor of cooked meat was studied. 18 lambs were divided into 3 equal groups. One grazing on traditional grassland pasture, one grazing for 3 weeks and one grazing for 6 weeks on Angelica pasture. The lambs were slaughtered at the age of 120-140 days. Quantitative Descriptive Analysis (QDA) was used to describe the sensory attributes of cooked loins with subcutaneous fat. Gas chromatography-mass spectrometry (GC-MS) and gas chromatography olfactometry (GC-O) were used to identify volatile compounds and describe their odors. Fatty acids were analyzed by gas chromatography (GC). Analysis of variance was used to study the influence of treatments on sensory attributes. Relationship between sensory attributes, volatiles and fatty acids was studied using principal component analysis (PCA) and Partial Least Square Regression (PLSR). Most part of the variation in sensory data (95.4%) was explained by the grazing or not grazing on Angelica. Meat of lambs that grazed on Angelica had spicy odor and flavor that correlated with high amount of α-pinene, β-phellandrene and octanal and C18: 1 and C18: 2 fatty acids while the meat of the control lambs that continued to graze on pasture had lamb meat and wooly odors and generally stronger odors and taste that correlated with high amounts of 2-butanone, 3-methyl-3-buten-1-ol and 3-hydroxy-2-butanone together with saturated fatty acids. Only small part of the variation (4.6%) was explained by how long the lambs grazed on Angelica. The results indicate that specific terpenoids, eg βphellandrene and α-pinene can be used as indicators of Angelica pasture. The results strongly indicate that grazing traditional grass pasture lambs on Angelica fields changes the flavor of the meat. The study confirms that the Angelica meat is unique and this can be used in the marketing of the meat.

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Reports

Marningskerfi / Mince processing lines

Published:

01/07/2009

Authors:

Róbert Hafsteinsson, Albert Högnason, Sigurjón Arason

Supported by:

AVS Research Fund

Contact

Sigurjón Arason

Chief Engineer

sigurjon.arason@matis.is

Marningskerfi / Mince processing lines

This project is a collaborative project of the following companies; Matís, Hraðfrystihúsið Gunnvör and 3X Technology. The main goal of this project is to increase the value of catfish by developing a process that increases the utilization and quality of marrow made from by-products, such as loins, which are made from filleting machines and cuttings made from cosmetic lines.

The main focus of the project is the development and construction of the following units to be able to produce high quality marrow from ridges. The following units / work components are involved:

  • Spine cutting machine  
  • Marble washing machine
  • Marningspressa
  • Crunching machine  

This project is a collaboration work between; Matis, Hraðfrystihúsið Gunnvör and 3X Technology. The main object of this project is to increase value of ground fish catch by improving utilization of fish muscle from by-products that is used for human consumption. The aim is to develop methods to process mince from frames without blood and thereby improve color and stability of the product during storage.

The main emphasis in this project is developing and construction of following components:

  • Fish frame cutter
  • Filtering drum
  • Minch press
  • Minch packing machine
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Reports

Improved processing of capelin roes

Published:

01/06/2009

Authors:

Margeir Gissurarson, Ragnheiður Sveinþórsdóttir, Þorgrímur Kjartansson, Sigurjón Arason, Guðjón Þorkelsson, Sindri Sigurðsson, Jón Helgason, Björn Brimar Hákonarson

Supported by:

AVS Fisheries Research Fund

Contact

Margeir Gissurarson

Strategic Scientist

margeir.gissurarson@matis.is

Improved processing of capelin roes

The processing of capelin roe is largely based on research and development that took place between 1972 and 1982. The weakness of the processing process has been the drying of the roe, where roe is left in pots for up to 20 hours where excess water is allowed to leak. . The drying method disrupts the continuity of processing, is costly and increases the risk of microbial growth in the product. The report discusses the effect of processing factors on the chemical and physical properties of capelin roe, as well as the results of experiments with continuous drying during the processing of capelin roe.

Current processing technique of Capelin roes is based on research and development carried out in 1972 to 1982. The weakness of the current process is the drying procedure where the roes are allowed to stand for up to 20 hours while excess water drains off to desirable level. This drying process disturbs the continuity of the process, is costly and increases the risk of bacteria growth. This report discusses the influence of various processing steps on the physical and chemical composition of the Capelin roes and results from experiments with continuous drying procedures in the processing of Capelin roes.

Report closed until 01.07.2011

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Reports

Processing in line boats / Processing in line boats

Published:

01/06/2009

Authors:

Róbert Hafsteinsson, Albert Högnason, Sigurjón Arason

Supported by:

AVS, Technology Development Fund

Contact

Sigurjón Arason

Chief Engineer

sigurjon.arason@matis.is

Processing in line boats / Processing in line boats

This project is a collaborative project of the following companies; Matís, Brim, Samherji, Vísir and 3X Technology. The aim of the project is to improve the processing processes of longline vessels with a view to reducing the cost of processing, increasing work efficiency and product quality. The project includes the results of a voyage with the icefish trawler Stefni ÍS, where the goal was to perform different refrigeration and bleeding experiments on cod and thus find out what is the best processing method / processing treatment with regard to the quality of the product. The processing deck on longliners will be designed differently, but the same units are used to maximize the quality of the catch. Several groups were taken who received different processing treatments on board. The groups then went to the processing of Hraðfrystihús Gunnvarar where they underwent a sensory evaluation test in the color and release of the fillets. The main results of the project showed that bleeding in the sea, preferably with a lot of water change, before cooling, gives a better color - the meat quality of the wreck. There was no significant difference between the groups in terms of loss, as they all had similar results.

This project is a collaboration work between; Matis, Brim, Samherji, Vísir and 3X Technology. The object of this project is to improve the process in line boats, by reducing production costs, improve working conditions and product quality. This project includes payoff from voyage with the ice-fresh trawler Stefnir ÍS, where the objective was to carry out difference bleeding and cooling methods on cod and find out which methods is efficient regards to the quality of the product. The processing deck in line boats will be implement difference, but same unitary will be used to increase the quality of the catch. The primary conclusion from the research on board Stefnir, is that bleeding in sea before cooling the fish, gives better results regard to the color of the fillet. The research also shows that there was not a significant difference between groups regards to results in looseness of the fillet.

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Reports

Pure muscle proteins from fish

Published:

01/06/2009

Authors:

Ragnar Jóhannsson, Sjöfn Sigurgísladóttir, Guðjón Þorkelsson, Arnljótur B. Bergsson

Supported by:

AVS, Technology Development Fund

Contact

Guðjón Þorkelsson

Strategic Scientist

gudjon.thorkelsson@matis.is

Pure muscle proteins from fish

Extensive research was carried out into the physical properties of muscle proteins from fish, especially cod. The project Pure muscle protein from fish proved to be another main support for the operations of Iceprotein ehf. during the company's formative years. The report describes the main results in the production process of refined muscle proteins from cuts and blueberries for use in fillets and ready-made products and the development that took place at Iceprotein ehf. when scaling up. The company Iceprotein is almost the result of the work that was put into the project. Fishballs were produced that were later eaten and evaluated and came out well in various ways, fishballs with isolated proteins as well as minced fish deteriorated less during cooking than fishballs that did not contain isolated proteins.

Great effort was used in viscoelastic measurements of cod muscle proteins. The project Pure muscle protein from fish proved to be one of the main pillars in the operations of Iceprotein ehf. in the offset of the company. In this report main results of the scale-up process at Iceprotein are followed through. The company Iceprotein basically spun off from the work done in this project. Fish balls from fish mince and fish protein isolates were prepared cooked, consumed and analyzed, fish balls containing FPI showed less weight loss in cooking than fish balls that did not contain FPI.

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Reports

Equalization - increased quality and improved properties of fish mince / Homogenization - increased value of fish mince

Published:

01/05/2009

Authors:

Kristín Anna Þórarinsdóttir, Magnea G. Arnþórsdóttir, Irek Klonowski, Arnljótur Bjarki Bergsson, Sindri Sigurðsson, Sigurjón Arason

Supported by:

AVS R 011‐08 / AVS R&D Fund of Ministry of Fisheries in Iceland TÞS 071321007 /Technology Development Fund, RANNIS ‐ Icelandic Center for Research

Contact

Sigurjón Arason

Chief Engineer

sigurjon.arason@matis.is

Equalization - increased quality and improved properties of fish mince / Homogenization - increased value of fish mince

The aim of the project was to develop a new production method for marrow mixture for injection into fish products based on leveling. The process gave good results in terms of stability, water resistance, appearance and sprayability of the mixture. The effects on micro-organisms varied according to the processes used and the raw materials, but they were not in all cases noticeable. The utilization and stability of the injected products increased significantly compared to untreated fillets and fillets injected with pure brine. Freezing significantly reduced the water resistance of the muscle. However, the benefit of the injection was in terms of total weight changes from processing until after thawing on the one hand and welding on the other. The report is a summary of experiments in the project "Membrane explosion - increased quality and improved properties of marrow". 

The aim of the project was to develop a process for homogenization of fish mince in solution for injection in fish products. The process was well suited for preparing a solution which had the right particle size, viscosity, water holding properties and stability for injection. The yield and stability of the protein injected fillets was increased compared to untreated fillets and fillets injected with pure salt brine. Freezing reduced water holding capacity but the yield was still higher than of untreated fillets, both after thawing and cooking.

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