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Biography Ragni Ofstad

I am a Senior Scientist in the departement Raw material and process optimization. This competence includes raw material knowledge, rapid and advanced measurement methods (biospektroscopy) and multivariate statistics and data modeling. I have also studied management at BI. I was hired as a researcher at Fiskeriforskning, now Nofima, in 1981, and since 2005 I have held various leadership positions at Matforsk, now Nofima. My area of expertise is how the structure (morphology) and structural changes of muscle of meat and fish are important for tenderness, texture and water binding. I have worked with various microscopic techniques and the use of imaging spectroscopy (micro-FTIR). I am a graduate of the Norwegian University of Science and Technology (NTNU) andtook my doctoral degree at the Norwegian Arctic University on water binding properties and muscle microstructure in 1995. The doctorate was partially conducted at SIK, Gothenburg. I have mainly worked with fish, but also have good knowledge on meat products. I have also experience of Mills DA as Director for Innovation for 2 years and I have worked one year as a visiting researcher at INRA in France. Research policy assignments: -Member of Norwegian Research Council reference group for H2020 (SC2); – Member of the steering committee of the National Technology Platform- Food for Life – Chair of working panel-Seafood, Hav21 (Strategies for Seafood research) -Appointment of professor at Swedish university of Agricultural Sciences, SLU. -Membe

Ragni Ofstad has 54 publications at Nofima:

FoodNexus Nordic. Next practices for entrepreneurship and innovation

Ofstad, Ragni (ed.); Ekstedt, Susanne (ed.)

2017

Next practices for Education in a changing Food system

Ofstad, Ragni (ed.); Ekstedt, Susanne (ed.)

2017

Low salt products Final report

Aursand, Ida Grong; Greiff, Kirsti; Erikson, Ulf Gøran; Gallart-Jornet, Lorena; Perisic, Nebojsa; Kohler, Achim; Afseth, Nils Kristian; Ofstad, Ragni; Storrø, Ivar; Josefsen, Kjell Domaas

2014

Characterizing salt substitution in beef meat processing by vibrational spectroscopy and sensory analysis

Perisic, Nebojsa; Afseth, Nils Kristian; Ofstad, Ragni; Narum, Bjørg; Kohler, Achim

2013

FTIR Imaging for Structural Analysis of Frankfurter Sausages Subjected to Salt Reduction and Salt Substitution

Perisic, Nebojsa; Afseth, Nils Kristian; Ofstad, Ragni; Scheel, Jan; Kohler, Achim

2013

Characterising protein, salt and water interactions with combined vibrational spectroscopic techniques

Perisic, Nebojsa; Afseth, Nils Kristian; Ofstad, Ragni; Hassani, Sahar; Kohler, Achim

2013

Atlantic salmon (Salmo salar L.) flesh quality - role of lysosomal cathepsins B and L in muscle degradation

Bahuaud, Diane; Mørkøre, Turid; Østbye, Tone-Kari K; Torstensen, Bente Elisabeth; Veiseth-Kent, Eva; Ruyter, Bente; Ofstad, Ragni; Thomassen, Magny S.

2010

The effect of postmortem processing treatments on quality attributes of raw Atlantic salmon (Salmo salar) measured by sensory and instrumental methods

Veiseth-Kent, Eva; Hildrum, Kjell Ivar; Ofstad, Ragni; Rørå, Anna Maria Bencze; Lea, Per; Rødbotten, Marit

2010

Relationship between muscle microstructure, the calpain system, and shear force in bovine longissimus dorsi muscle

Veiseth-Kent, Eva; Hollung, Kristin; Ofstad, Ragni; Aass, Laila; Hildrum, Kjell Ivar

2010

Noncontact Salt and Fat Distributional Analysis in Salted and Smoked Salmon Fillets Using X-ray Computed Tomography and NIR Interactance Imaging

Segtnan, Vegard; Høy, Martin; Sørheim, Oddvin; Kohler, Achim; Lundby, Frank; Wold, Jens petter; Ofstad, Ragni

2009

Atlantic salmon (Salmo salar) muscle structure integrity and lysosomal cathepsins B and L influenced by dietary n-6 and n-3 fatty acids

Bahuaud, Diane; Østbye, Tone-Kari K; Torstensen, Bente Elisabeth; Rørå, Mia B.; Ofstad, Ragni; Veiseth, Eva; Thomassen, Magny Skinlo; Ruyter, Bente

2009

Effects of -1.5 degrees C Super-chilling on quality of Atlantic salmon (Salmo salar) pre-rigor Fillets: Cathepsin activity, muscle histology, texture and liquid leakage

Bahuaud, Diane; Mørkøre, Turid; Langsrud, Øyvind; Sinnes, K.; Veiseth, Eva; Ofstad, Ragni; Thomassen, Magny Skinlo

2008

Revealing covariance structures in FT-IR and Raman microspectroscopy spectra - A study on pork muscle fiber tissue subjected to different processing parameters

Böcker, Ulrike; Ofstad, Ragni; Wu, Zhiyun; Bertram, Hanne Christine; Sockalingum, Ganesh Dhruvananda; Manfait, Michel; Egelandsdal, Bjørg; Kohler, Achim

2007

Analyzing designed experiments with multiple responses

Langsrud, Øyvind; Jørgensen, Kjetil; Ofstad, Ragni; Næs, Tormod

2007

Multivariate image analysis of a set of FTIR microspectroscopy images of aged bovine muscle tissue combining image and design information

Kohler, Achim; Bertrand, Dominique; Martens, Harald; Hannesson, K.O.; Kirschner, Carolin; Ofstad, Ragni

2007

Revealing covariance structures in Fourier transform infrared and Raman microspectroscopy spectra: A study on pork muscle fiber tissue subjected to different processing parameters

Böcker, Ulrike; Ofstad, Ragni; Wu, Zhiyun; Bertram, Hanne; Sockalingum, Ganesh D.; Manfait, Michel; Egelandsdal, Bjørg; Kohler, Achim

2007

Development of a novel fermented and dried saithe and salmon product

Nordvi, Berit; Egelandsdal, Bjørg; Langsrud, Øyvind; Ofstad, Ragni; Slinde, Erik

2007

An immunological study of glycosaminoglycans in the connective tissue of bovine and cod skeletal muscle

Hannesson, Kirsten; Tingbø, Monica Gausdal; Olsen, Ragnar Ludvig; Enersen, Grethe; Bævre, Anne Birgit; Ofstad, Ragni

2007

Development of a novel, fermented and dried saithe and salmon product

Nordvi, Berit; Egelandsdal, Bjørg; Langsrud, Øyvind; Ofstad, Ragni; Slinde, Erik

2006

Salt-induced changes in pork myofibrillar tissue investigated by FT-IR microspectroscopy and light microscopy

Böcker, Ulrike; Ofstad, Ragni; Bertram, Hanne; Egelandsdal, Bjørg; Kohler, Achim

2006

Heat processed whey-protein food emulsions and growth of shear-induced cracks during cooling

Ofstad, Ragni; Langsrud, Øyvind; Nyvold, Tone; Enersen, Grethe; Høst, Vibeke; Willers, Ene; Nordvi, Berit; Egelandsdal, Bjørg

2005

Sulfated glycosaminoglycans in the extracellular matrix of muscle tissue in Atlantic cod (Gadus morhua) and Spotted wolffish (Anarhichas minor)

Tingbø, Monica Gausdal; Kolset, Svein Olav; Ofstad, Ragni; Enersen, Grethe; Hannesson, Kirsten O.

2005

Microstructure of heat processed whey protein food emulsions and growth of shear-induced cracks during cooling

Ofstad, Ragni; Langsrud, Øyvind; Høst, Vibeke; Enersen, Grethe; Willers, Ene; Norvi, Berit; Egelandsdal, Bjørg

2005

Monitoring of denaturation processes in aged beef loin by FT-IR microspectroscopy

Kirschner, C.; Ofstad, Ragni; Skarpeid, Hans Jakob; Høst, Vibeke; Kohler, Achim

2004

Breakdown of large proteoglycans in bovine intramuscular connective tissue early postmortem

Hannesson, KO; Pedersen, Mona Elisabeth; Ofstad, Ragni; Kolset, Svein Olav

2003

Changes in water-holding capacity of halibut muscle during cold storage

Olsson, Gunn Berit; Ofstad, Ragni; Lødemel, Jørgen Blikra; Olsen, Ragnar Ludvig

2003

Statistisk metodikk for å lage robuste produktresepter gjennom optimal prosessering og effektiv råvareutnyttelse i næringsmiddelindustrien

Egelandsdal, Bjørg; Solheim, Ragnhild; Berget, Ingunn; Dingstad, Gunvor; Langsrud, Øyvind; Magnus, Ellen Merethe; Ofstad, Ragni; Baardseth, Pernille; Westad, Frank; Tøgersen, Geir; Arneberg, Per; Haugdal, Janne; Strande, Svein Erik

2003

Estimating significant causes of variation in emulsion's droplet size distributions obtained by the electrical sensing zone and laser low angle light scattering technique

Egelandsdal, Bjørg; Langsrud, Øyvind; Nyvold, Tone; Sontum, Per kristian; Enersen, Grethe; Hølland, Sigurd; Ofstad, Ragni; Sørensen, Charlotte

2001

Surimi from blue whiting (Micromesistius poutassou) produced on board m/s Uksnøy: process and quality

Ofstad, Ragni; Grahl-Madsen, Elisabeth; Solberg, Christel; Burt, J.R.; Hardy, R.; Whittle, K.J.

1992

Partial least squares evaluation of the influence of calcium and magnesium on functional properties of washed fish mince (surimi)

Solberg, Terje; Grahl-Madsen, Elisabeth; Gundersen, Bjørn; Solberg, Christel; Ofstad, Ragni

1992

Kolmulesurimi : prosess og kvalitet

Ofstad, Ragni; Grahl-Madsen, Elisabeth; Solberg, Christel

1990