Category: Reports

Reports

Development of a genetic analysis method for the species determination of the main marine organisms of Iceland / Species identification of Icelandic marine organisms using a genetic analyzes technique

Published:

01/05/2009

Authors:

Sigurlaug Skírnisdóttir, Þorsteinn Sigurðsson, Ólafur K. Pálsson, Sigríður Hjörleifsdóttir

Supported by:

AVS Fisheries Research Fund

Contact

Sigurlaug Skírnisdóttir

Project Manager

sigurlaug.skirnisdottir@matis.is

Development of a genetic analysis method for the species determination of the main marine organisms of Iceland / Species identification of Icelandic marine organisms using a genetic analyzes technique

As the name of the project "Development of a genetic analysis method for species determination of Iceland's main commercial stocks" (reference number AVS R 012‐07 (08)) indicates, the aim of the project was to develop a rapid and reliable genetic analysis method for species analysis of Icelandic marine resources. There was no quick and reliable analysis method for Icelandic marine resources that are at the various stages of life and processing. Until now, appearance analyzes have been dominant in species analyzes of more complex organisms, but this work requires highly trained classification scientists and this method is generally time-consuming. Many marine organisms, eggs, larvae, juveniles and juveniles of fish are very difficult to distinguish from physical characteristics. If samples are not whole or detect an immature organ form, experts can not even identify the sample by species. Sequencing of species is a powerful and fast method for identifying unknown organisms. In the project, 26 marine resources were investigated. Genetic material was isolated from the samples but then the mitochondrial cytochrome c oxidase subunit 1 (COI), cytochrome b (Cytb) and 16S RNA (16S) were amplified with conserved indicators and then sequenced. The method was known, but some work was done to find the right references and the amazing conditions for the various groups. It has been internationally agreed to use the COI gene as a marker gene and several large sequencing projects are underway where large and powerful databases are under construction (such as the "Barcode of Life"). In the project, the COI, Cytb and 16S genes were partially differentiated for utilitarian organizations, and a total of 1-5 individuals were examined for each species. These sequences were collected in a database prepared together with published sequences for these species and other related species. After developing the method and setting up the database, the sensitivity of the method was examined with three types of unknown samples (blind samples). Firstly, samples were obtained from fish shops, secondly, samples from the Marine Research Institute's sample collection were analyzed and finally juveniles that were 2-8 cm long were analyzed. In all cases, the unknown samples were species identified using the DNA genetic method, but the appearance of the juveniles was quite difficult. DNA type analysis is much faster, cheaper and more accurate than traditional appearance analysis. This method therefore has a strong impact on the economy in order to ensure reliable analyzes of all life forms of the exploitable stocks, for the analysis of mixed samples from the sea and for species analysis at all stages of processing of marine products. Matís-Prokaria has already acquired a business for such an analysis service.  

The goal of the project “Species identification of Icelandic marine organisms using a genetic analyzes technique” (project no. AVS R 012‐07 (08)) was to develop a sequencing databank for three chronometer mitochondria genes for 26 Icelandic marine species. Furthermore, to develop a DNA protocol to analyze mixed unknown samples, such as juveniles of fishes and identification of fishes in fish stores. Classical morphological identification of marine species is time-consuming and depends on a high degree of taxonomic expertise. This expertise is currently falling short, therefore, in many cases the identification of a species is the major bottleneck in marine biodiversity and ecosystem research. On demand, molecular diagnostic techniques have proven to be successful species identification tools. Recently, DNA barcoding has been highly accepted as a rapid, cost ‐ effective and widely applicable tool for species identification. Currently, the three most common DNA barcoding targets are the mitochondrial genes cytochrome c oxidase I (COI), cytochrome b (Cytb) and 16S RNA (16S). For DNA barcoding, the mtDNA gene, cytochrome c oxidase I (COI), has been highlighted as the genetic marker for species identification in huge international projects, like the project “Barcode of Life”. In this project we did a partial sequencing of these three genes of 26 Icelandic marine organisms that are utilized in Iceland. The method is straight forward; DNA is isolated from the specimen, the three genes are PCR amplified in separated reactions by using universal primers and then sequenced. A database was developed, saving the sequences obtained in the project for the three genes. Finally, 24 unknown samples (blind samples) were analyzed. Part of the samples were fish fillets from fish shops, some were samples from the databank of MRI and some samples were juvenile fishes that were difficult to identify by morphology. All samples were species identified easily by using the sequencing method, supporting the importance of the method. DNA species identification is more rapid, cost ‐ effective and more accurate than the classical morphological identification method. Therefore, this method is an important tool for the industry to ensure reliable identification of marine organisms in all life stages and process stages. Matis ‐ Prokaira already has customers for such identification services. 

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Reports

CFD Modeling and Quality Forecasting for Cooling and Storage of Pelagic Species

Published:

01/04/2009

Authors:

Lárus Þorvaldsson, Björn Margeirsson, Sigurjón Arason

Supported by:

AVS Fisheries Research Fund, Byggðastofnun

Contact

Sigurjón Arason

Chief Engineer

sigurjon.arason@matis.is

CFD Modeling and Quality Forecasting for Cooling and Storage of Pelagic Species

In the project, a computerized thermal and hydrological model of storage tanks for pelagic catches is built. The input of the model is time-dependent ambient temperature, which in turn returns the temperature distribution of the mixture of pelagic catches and seawater stored in the tanks. That model is such an intertwined quality forecast model that indicates the development of damaging substances such as TMA and NH3 based on the temperature history obtained from the thermodynamics model. The main result of the project is the development and application of technology that makes it possible to predict the damage processes of pelagic catches at a given environmental temperature history. This technology could prove to be extremely useful in the handling and processing of pelagic catches. Collaborating companies in the project are Síldarvinnslan, Skinney‐ Þinganes and HB Grandi.

In this project a thermodynamic model of storage tanks used for cooling and storage of pelagic species is constructed. The input for the model is transient ambient temperature, which gives the temperature and velocity distribution in the mixture of pelagic species and seawater. This model is then coupled with a quality forecast model, which predicts the development of spoilage indicators such as TMA and NH3 from the temperature time series which are retrieved from the thermodynamic model. The main result of the project was the development and application of a technique which makes it possible to predict the spoilage of pelagic species given only ambient temperature history. This could prove immensely useful in the management and processing of pelagic species. The following companies take part in this project: Síldarvinnslan, Skinney ‐ Þinganes and HB Grandi.

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Reports

Processing and quality control of farmed cod

Published:

01/04/2009

Authors:

Kristín Anna Þórarinsdóttir, Valur Norðri Gunnlaugsson, Guðrún Anna Finnbogadóttir, Kristján Jóakimsson, Sigurjón Arason

Supported by:

AVS R26-06 / AVS R&D Fund of Ministry of Fisheries in Iceland

Contact

Valur Norðri Gunnlaugsson

Research Group Leader

valur@matis.is

Processing and quality control of farmed cod

The report is a summary of the results of the project "" Processing and quality control of farmed cod "which was carried out in collaboration between HG and Matís. Ways were sought to develop traditional methods for the production of fresh, frozen and lightly salted products so that they could be used for farmed fish. The aim of the project was to provide products from farmed cod with valuable and varied products that met the quality requirements of the market. Processing of farmed cod must be carried out before death. Otherwise there is a risk that the formation will be so great that the products will in the worst case be unsaleable. Chilled and loose-frozen products are of comparable quality to products made from wild cod. However, the properties are not the same and this is reflected in the taste and texture properties, among other things. Wild cod is coarser and often juicier, but farmed cod has a more meaty and stuttering texture and is sweeter in taste. Processing for death solidification means that traditional salting processes for farmed fish cannot be used. In light salting, methods such as injection and prolongation of the pickling time can be used to reduce the negative effects of lethal stiffness on uptake during normal course of action. Salting and temperature conditions need to be very well controlled to minimize the risk of microbial growth as very low salinity is used in the production of lightly salted (2% salt) products.

This report summarizes the results from the project "Processing and quality control of farmed cod" where processing and salting methods for farmed cod were developed in co-operation of HG (HradfrystihusidGunnvor Ltd) and Matís ohf. The main difference in processing of farmed and wild cod is that farmed cod has to be processed before rigor mortis. Otherwise there is a high risk of gaping and quality defects in products that are not accepted by markets. Chilled and IQF products processed from pre-rigor farmed cod were of similar quality as products from wild cod. However, farmed cod products have different properties, they have a sweeter taste and more "meaty" and firmer texture than products from wild cod which are softer and juicier. Processing of farmed cod before rigor retards weight increase and salt uptake during light salting. The effects of rigor can be reduced using brine injection and increasing brining time from traditional processed for farmed cod. Salting conditions and temperature must be carefully controlled during the process to avoid microbial growth at the low salt levels used in production of light salted (2% NaCl) products.

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Reports

Microbial diversity in hot springs in Vonarskarð / Microbial diversity in hot springs in Vonarskarð

Published:

01/03/2009

Authors:

Sólveig K. Pétursdóttir, Snædís H. Björnsdóttir, Sólveig Ólafsdóttir, Guðmundur Óli Hreggviðsson

Supported by:

Orkustofnun due to the Master Plan

Contact

Guðmundur Óli Hreggviðsson

Strategic Scientist

gudmundo@matis.is

Microbial diversity in hot springs in Vonarskarð / Microbial diversity in hot springs in Vonarskarð

Samples were taken in the geothermal area east of Eggja in Vonarskarð. A total of 32 samples were taken from different hot springs, streams and soils at different temperatures and acidity levels. Elements were measured in several water samples. The species composition of bacteria and ancient bacteria was determined by molecular biological methods. A total of 1052 16S rRNA gene sequences of bacteria were detected, spreading across 23 factions. More than 50 new bacterial species were found in the samples, of which 11 are probably representatives of new genera. The genome of ancient bacteria was 155 in number. Ten new species of ancient bacteria were found, including five representatives of new genera. The ecosystem of the geothermal area as a whole must therefore be considered very special. The most common were the primitive species of the array Aquificae. Primitive and non-primitive Proteobacteria species were found in significant quantities and were both known and new species. Typical species of bluish-green bacteria and Chloroflexi were found in the samples. Firmicutes, Bacteroidetes and Chlorobi species were found mainly in samples taken at lower temperatures. Ancient bacteria found in the samples were spread over two largest groups of ancient bacteria, i.e. Crenarcheota and Euryarchaeota. The biological diversity of bacteria and archaeal bacteria in the samples was most often in the range Nt / Nmax = 1.0 -3.0, which is typical of peripheral ecosystems. In some cases it was higher, especially in samples where the temperature was relatively low and therefore more viable for more species. Seven bacterial species were cultured from the samples, including one new species of the genus Sediminibacter from the Bacteroidetes class. Several Thermus species were bred, including T.islandicus which is native to Iceland. The proteobacteria Thermomonas hydrothermalis and Tepidimonas ignava were also grown from several samples and the thermophilic Firmicutes species Anoxybacillus kualawohkensis.

Samples were taken from the geothermal area east of Eggja in Vonarskarð. A total of 32 samples were collected from different sites at various temperature and pH values. The concentration of 72 elements were estimated in water samples. Species composition of Bacteria and Archaea was estimated using molecular methods. A total of 1052 16S rRNA gene sequences belonging to 23 bacterial phyla were detected. Roughly 50 novel bacterial species were found of which 11 represent new genera. Ten novel archaeal species were found, five of which represent new genera. Species belonging to the autotrophic phylum of Aquificae dominated many samples. Species of different subphyla of Proteobacteria were also represented in high ratios in the samples, both described and novel species. Common species of Cyanobacteria and Chloroflexi were also detected. Species of the Firmicutes, Bacteroidetes and Chlorobi phyla were common in samples taken at lower temperatures. Archaeal species in the samples belonged to both Crenarchaeota and Euryarchaeota. The calculated biodiversity index for bacteria and archaea in the samples was 1,0-3,0 which is in concordance with values obtained for extreme ecosystems. It was higher in a few samples which were taken at lower temperatures and thus represent habitats acceptable for more diverse organisms. Seven bacterial species were isolated from the samples. One of these represents a novel species of the genus Sediminibacter within the phylum of Bacteroidetes. Several Thermus species were cultivated, ie T.islandicus which has so far only been found in Iceland. The Proteobacteria species Themomonas hydrothermalis and Tepidimonas ignava were also isolated as well as a thermophilic Firmicutes species, Anoxybacillus kualawohkensis.

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Reports

Production of wheeled animals for cod farming / Production of quality rotators for breeding cod fry

Published:

01/03/2009

Authors:

Jónína Þ Jóhannsdóttir, Agnar Steinarsson, Rannveig Björnsdóttir

Supported by:

Nordic-Atlantic co-operation (NORA)

Production of wheeled animals for cod farming / Production of quality rotators for breeding cod fry

There is great interest in finding ways to control farming conditions at all stages of aquaculture. The control of microbial flora in the environment and the gastrointestinal tract of larvae is, among other things, thought to be able to reduce losses that occur in the early stages of marine fish farming. A large number of bacteria usually accompanies feed animals in cod farming, but the use of recycling systems in the breeding of equidae has, among other things, the advantage that a smaller number of bacteria gain a foothold in the systems compared to batch farming. The use of bacterial flora for bacterial flora control has increased significantly in recent years and has in some cases contributed to increased growth and quality of larvae. In addition to strengthening co-operation between cod juvenile producers in the Nordic countries, the aim of the project is to develop methods that increase stability and efficiency in the production of feed animals. It is based on a recycling system designed by Sintef in Norway and this section investigates the effects and presence of selected beneficial bacteria in the system. The main results of treatment with two selected bacterial strains showed that the wheeled animals tolerated the treatment well and an increased crop of animals was obtained when treated with the bacteria in lyophilized form. There was a significant decrease in the number of bacteria in the purgatory during treatment with liquid bacterial culture and the number of bacteria in the purgatory did not reach the initial number during the experiment, but there was some increase in the number of lactic acid bacteria. Although the amount of lactic acid bacteria in equidae only increased after treatment, the bacterial strains did not gain a foothold in the system or lead to changes in the composition of the bacterial flora when treated at this concentration. The project is funded by Nordisk Atlantsamarbejde (NORA) and worked in collaboration with Matís, the Marine Research Institute, SINTEF, Fiskaaling, IceCod and Stofnfisk as well as Nordland Marin Yngel.

There is an increasing interest in controlling environmental parameters during the first production stages of aquaculture and controlling bacterial numbers is among various environmental parameters that are believed to promote increased survival of larvae. Elevated bacterial numbers are introduced into the system through the live feed, but numbers of bacteria have been found to be greatly reduced by the use of recirculation culturing system as compared with batch culturing systems. Furthermore, the use of potentially probiotic bacteria in aquaculture has increased over the past years and has in some cases contributed to increased growth and quality of marine larvae. In addition to promoting collaboration between cod producers within the Nordic countries, the main goal of the current project is to develop methods for stable and advantageous production of live feed animals (rotifers). The project is based on a recirculation culturing system engineered by SINTEF and the present part of the project deals with the effect of treatment and persistence of selected probiotic bacterial strains in the system. The overall results indicate that the rotifer cultures were not negatively affected by the bacterial treatment and treatment using freeze-dried preparations of the two probiotic strains even resulted in improved harvesting of the live feed. A drop in bacterial numbers within the bio-filter unit was, however, observed following the addition of liquid bacterial cultures, indicating negative effects of the bacteria on the bacterial community of the bio-filter unit. An increase in the numbers of lactic acid bacteria was observed in the rotifer cultures following treatment, but the probiotic bacterial strains were neither found to become established as a part of nor affect the dominating bacterial community of the system using the concentrations applied. The project was supported by the Nordisk Atlantsamarbejde (NORA) and is a collaboration between Matís, Hafrannsóknastofnun, SINTEF, Fiskaaling, IceCod, Stofnfiskur and Nordland Marin Yngel.

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Reports

Air-dried lamb. Forathugun / Air dried products from lamb

Published:

01/03/2009

Authors:

Þóra Valsdóttir, Óli Þór Hilmarsson, Guðjón Þorkelsson

Supported by:

Technology Development Fund

Contact

Þóra Valsdóttir

Project Manager

thora.valsdottir@matis.is

Air-dried lamb. Forathugun / Air dried products from lamb

The aim of the project is to prepare a collaborative project between parties in Iceland, the Faroe Islands and Norway on the development of air-dried lamb products in connection with the establishment of small start-up companies and food tourism.

The report includes a summary and analysis of the state of air drying in Iceland and a survey of market and commercial criteria. The analysis is divided into:

(1) a survey of the status of air-dried lamb in Iceland

(2) the impact of production methods on efficacy, quality and safety: a summary of technical and safety considerations; and

(3) a summary of the criteria for marking the origin and protection of certain products.

Finally, the selection of partners and the formulation of projects related to air drying of lamb are explained.

The aim of the project is to prepare a cooperative project between parties in Iceland, Faroe Islands and Norway on development of new air-dried products from lamb. The product development will be done in relation with establishment of small companies and food tourism.

The report is a summation and analysis on the situation of air drying in Iceland and exploration of market and business-related issues. The analysis is divided into:

(1) exploration on the situation of air dried lamb in Iceland

(2) influence of production methods on curing, quality and safety

(3) summation of criterion for origin-based labeling and protection of specific products.

Finally, established cooperation and creation of projects linked to air dried lamb is listed.

Report closed until 01.04.2012 / Report closed until 01.04.2012

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Reports

Assessment of slaughter in sheep slaughterhouses in the autumn of 2008

Published:

10/02/2009

Authors:

Valur Norðri Gunnlaugsson, Óli Þór Hilmarsson, Ásbjörn Jónsson, Guðjón Þorkelsson

Supported by:

National Association of Sheep Farmers

Contact

Valur Norðri Gunnlaugsson

Research Group Leader

valur@matis.is

Assessment of slaughter in sheep slaughterhouses in the autumn of 2008

The Annual General Meeting of the National Association of Sheep Farmers decided in April 2008 that a detailed assessment will be made of the treatment of lamb at slaughter, especially during killing and cooling. An explanatory memorandum to the resolution stated: "The meeting considers it necessary to examine the possible effects of these two factors on the quality of the meat. When the animal is killed by electricity, there is a risk that the carcasses will not be able to bleed sufficiently and there is a risk of cooling hardening with too rapid cooling or freezing. Matís ohf. carried out an assessment of the above factors in the autumn of 2008 where the killing and cooling processes in 6 slaughterhouses were examined, of which one house was visited twice. Monitor the killing of 100 carcasses in each house to see procedures and take out facilities. The acidity and temperature of the carcass were measured regularly as well as the temperature in the slaughterhouses of the slaughterhouses. Carcasses taken in this study followed jogging through the normal process of action in each slaughterhouse, but before freezing, the backbone was removed and frozen. Vertebral muscles were then used in texture measurements to see different gravitational processes between slaughterhouses on the meat of the meat. The results show that the killing method affects the death stiffening process. It was much further in the carcasses of lambs in houses that use the "head-back" method than in houses that had a head clip. Cooling time is clearly too short in some houses. Thus the freezing temperature was highest as it was shortest and well above 6.0 in the house where it was only 4 hours. The viscosity of the meat was lowest in the vertebral carcasses from the slaughterhouse, where the head-back killing method was used, electrical stimulation was used and extensive and long cooling ensured that the meat was almost completely tenderized.

At annual general meeting of sheep farmers association in 2008 was concluded that a general observation ought to take place on treatment of lamb meat at slaughterhouses, particularly at electrocute step and the cooling phase. The aim was to see the influence of these factors on meat quality. Matis ohf. visited 6 slaughterhouses in autumn 2008. The results showed that the electrocution method affected the pH of carcasses. In some slaughterhouses the cooling phase was too short and therefore the pH was too high in carcasses when they were frozen. The tenderest meat came from the slaughterhouse where the meat was electrically stimulated and there was a long cooling paste.

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Reports

Attitudes and fish consumption of young people aged 16 to 20: Intervention in Akureyri Young consumer attitudes and fish consumption: Improved image of seafood

Published:

01/02/2009

Authors:

Gunnþórunn Einarsdóttir, Ása Vala Þórisdóttir, Fanney Þórsdóttir, Kolbrún Sveinsdóttir, Emilía Martinsdóttir, Friðrik H. Jónsson, Inga Þórsdóttir

Supported by:

AVS Fisheries Research Fund: R020-05

Contact

Kolbrún Sveinsdóttir

Project Manager

kolbrun.sveinsdottir@matis.is

Attitudes and fish consumption of young people aged 16 to 20: Intervention in Akureyri Young consumer attitudes and fish consumption: Improved image of seafood

1. The aim of the project "Attitudes and fish consumption of young people: Improving the image of seafood" was, among other things, to obtain information on the attitudes and fish consumption of young people. Here is a summary of the results of a participatory study conducted on young people aged 16-20 years. It was examined whether education about fish and more access to it would result in increased fish consumption and more positive attitudes towards fish.

Method and participants: The study was conducted on students from Menntaskólinn á Akureyri and Verkmenntaskólinn á Akureyri who lived on the student parks Lund. The intervention took place in such a way that the number of fish meals in the canteen was increased by half and educational lectures were held for the students where more than 80 students attended (27%) and a presentation was posted on the website. An opinion and consumption survey was prepared in the form of a questionnaire and presented to the students. The same survey was conducted in the fall of 2006 (n = 225, 75%) before the intervention and in the spring of 2007 (n = 220, 73%) after the intervention. The questionnaire was divided into seven sections: 1. Attitudes towards health and food categories; 2. Fish consumption and consumption of various foods; 3. Taste for fish dishes; 4. Factors affecting fish consumption; 5. Prerequisites for fish consumption; 6. External influencers, 7. Knowledge regarding fish.

Results: The intervention resulted in better knowledge of the fish and fish oil consumption increased by almost half and more in girls than boys. Thirty-two percent of students consumed fish oil daily after the intervention but only 22% before the intervention. Furthermore, 38% consumed fish oil 4-7 times a week after the intervention but only 28% before the intervention. On average, the young people ate fish as a main course 1.8 times a week before the intervention and 1.9 times a week after the intervention, but the difference was not significant. The students' fish consumption is therefore not far from the Public Health Institute's recommendations. In terms of incentives for fish consumption, parents were the strongest influencers, but their influence diminished only after intervention. Students' attitudes towards fish became more negative after the intervention, but despite this, their fish consumption did not decrease. Those who did not have fish before the intervention liked it better after the intervention. Targeted education about both healthy fish and an increased supply of diverse fish dishes are necessary to promote increased fish consumption by young people.

The aim of the project “Young consumer attitudes and fish consumption: Improved image of seafood” was to obtain information on the attitudes of young people towards fish and fish consumption. Results are shown from an interventive research which was carried out on young people of the age group 16-20. It was examined if education about fish and its accessibility would result in increased fish consumption and more positive attitudes towards fish. Method and participants: Students from the college and vocational school at Akureyri participated in the study. The intervention was done by doubling the number of fish meals at the school's canteens and informative lectures were given to over 80 students (27%) and information was given on the school web. The students answered a questionnaire on attitudes and consumption of fish. The same study was done twice; in the autumn 2006 (n = 225, 75%) before the intervention and in spring 2007 (n = 220, 73%) after the intervention The questionnaire was divided into 7 parts: 1. Attitudes towards health and food types; 2. Consumption of fish and other foods; Liking of various fish dishes; 4. Factors affecting fish consumption; 5. Prerequisite of fish consumption; 6. External effects; 7. Knowledge about fish. Results: The intervention resulted in better knowledge about fish and the fish liver oil consumption almost doubled, more among girls than boys. Thirty-two percent of the students consumed fish oil daily after the intervention but only 22% before. Further, 38% consumed fish oil 4-7 times a week after the intervention but only 28% before. On average, the young people consumed fish as a main dish 1.8 times a week before the intervention but 1.9 after, the difference was not significant. The fish consumption of the students is therefore not far from the recommendation of the Public Health Institute of Iceland. The parents had the most influence on encouraging increased fish consumption, but their effect decreased a little after the intervention. The attitudes of the students towards fish became more negative after the intervention but did not however decrease their fish consumption. Those who did not like fish before the intervention liked it better after the intervention. Systematic education on the wholesomeness of fish and increased variety of fish dishes are essential to encourage increased fish consumption among young people.

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Reports

Bioactive properties of whey proteins

Published:

01/02/2009

Authors:

Patricia Y. Hamaguchi, Sigrún Mjöll Halldórsdóttir, Hörður G. Kristinsson, Arnljótur B. Bergsson, Guðjón Þorkelsson

Supported by:

The Agricultural Production Fund & Growth Agreement in North West

Bioactive properties of whey proteins

The research described in this report is part of the project Utilization of cheese whey in health-related foods. The project is about improving the utilization and increasing the value of whey that is generated during cheese production at Mjólkursamlag KS in Sauðárkrókur by using both protein and lactose for the production of health drinks and dietary supplements. With improved utilization of milk, for example through the use of whey proteins, unnecessary release of biological substances into the environment can be avoided. Ostamysa from Mjólkursamlag KS was separated into four parts by membrane filtration equipment (Membrane Pilot Plant Type MEM11) in the processing hall of the Matís Biotechnology Center in Sauðárkrókur by Iceprotein employees, on the one hand through a 10 kDa membrane and on the other hand a 200 Da membrane. Chemical composition (moisture, protein, salt, minerals) and bioactivity (ACE inhibitory activity and antioxidant properties) were analyzed in Matís' laboratory in these four samples and the whey itself was measured unchanged. The results are promising and show that there is bioactivity in the whey, which can be used in target foods.

The experiment described in this report is part of the project Utilization of Cheese whey in health-based food products which aims are to improve utilization and increase value of whey that is discarded during the cheese production at KS Sauðárkrókur, by using proteins and lactose to produce health drink and nutritional supplements. With better utilization, unnecessary disposal of bioactive components can be avoided. Cheese ‐ Whey samples from KS were fractionated with membrane filtration equipment (Membrane Pilot Plant Type MEM11) at Matís Biotechnology center in Sauðárkrókur with molecular weight cut ‐ offs 10 kDa and 200 Da. Chemical composition and bioactivity properties were analyzed at Matís Laboratory. Results show that whey contains promising bioactive compounds that could be used as functional food.

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Reports

Compilation of previous test results of capelin roes / Compilation of previous test results of capelin roes

Published:

01/02/2009

Authors:

Margeir Gissurarson, Hannes Magnússon, Ragnheiður Sveinþórsdóttir, Cecilia Garate

Supported by:

AVS Research Fund

Contact

Margeir Gissurarson

Strategic Scientist

margeir.gissurarson@matis.is

Compilation of previous test results of capelin roes / Compilation of previous test results of capelin roes

In recent years and decades, various measurements and research on capelin roe in Iceland have been carried out at Matís ohf / Rannsóknastofnun fiskiðnaðarins. This is primarily a study of microorganisms, egg filling and water content. The report will cover microbial research carried out during the 1984 season, microbiological measurements in the period 2000-2008 and measurements of water content and egg filling 1984-2008.

In recent years and decades various studies and measurements have been carried out on capelin roes in Iceland at Matís ohf / Icelandic Fisheries Laboratories. They mainly include studies on microorganisms, roe-fill and water content. In this report, microbial studies on microorganisms from the capelin season 1984 are presented along with microbial measurements carried out during 2000-2008 and measurements of roe-fill and water content 1984- 2008.

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