Biography Nils Kristian Afseth
My work as a PhD student covers the fields of spectroscopy, chemometrics and chemistry. The PhD research project wears the working title ”Spectroscopy for the rapid analysis of foods”, lies within the Matforsk project ”Effective assessment of food quality by rapid spectroscopic and sensor techniques”, and is performed under the strict supervision of Vegard Segtnan, Jens Petter Wold and Tomas Isaksson. The PhD research project serves several aims. I mainly work with spectroscopic techniques like Near-Infrared, Infrared and Raman spectroscopy and compare these techniques used as rapid and non-destructive methods for analysing interesting components of various kinds of food systems. In addition I try to combine various chemometric techniqueswith basic knowledge about the spectroscopic methods and the chemistry of the specific food systems to assure robust and quantitative descriptions of the components of interest. So far I have used quite a bit of time working with Raman spectroscopy. The theory of Raman scattering has been known for about 80 years, but not until recent years the Raman instruments have grown to be robust, less expensive and thus more available for both research and industry. The technique is rapid, the need for sample preparation is minimal, and molecular vibrations due to water do not dominate in Raman spectra like they often do in Near-Infrared and Infrared spectra. However, issues related to sensitivity and interfering physical features often provide cha
Nils Kristian has 60 scientific publications in Cristin:
Wubshet, Sileshi Gizachhew; Wold, Jens-Petter; Böcker, Ulrike; Sanden, Karen Wahlstrøm; Afseth, Nils Kristian; 2019: Raman spectroscopy for quantification of residual calcium and total ash in mechanically deboned chicken meat
Monago-Marana, Olga; Monago-Maraña, Olga; Eskildsen, Carl Emil Aae; Afseth, Nils Kristian; Galeano-Diaz, Teresa; Galeano-Díaz, Teresa; Munoz de la Pena, Arsenio; de la Pena, Arsenio Muñoz; Wold, Jens-Petter; 2019: Non-destructive Raman spectroscopy as a tool for measuring ASTA color values and Sudan I content in paprika powder
Kirkhus, Bente; Afseth, Nils Kristian; Borge, Grethe Iren Andersen; Grimsby, Sveinung; Steppeler, Christina; Krona, Annika; Langton, Maud; 2019: Increased release of carotenoids and delayed in vitro lipid digestion of high pressure homogenized tomato and pepper emulsions
Eskildsen, Carl Emil Aae; Næs, Tormod; Wold, Jens-Petter; Afseth, Nils Kristian; Engelsen, Søren Balling; 2019: Visualizing indirect correlations when predicting fatty acid composition from near infrared spectroscopy measurements
Lemos Lima, Rita de Cássia; Berg, Ragnhild Stenberg; Rønning, Sissel Beate; Afseth, Nils Kristian; Knutsen, Svein Halvor; Staerk, Dan; Wubshet, Sileshi Gizachhew; 2019: Peptides from chicken processing by-product inhibit DPP-IV and promote cellular 2 glucose uptake: potential ingredients for T2D management
Lemos Lima, Rita de Cássia; Berg, Ragnhild Stenberg; Rønning, Sissel Beate; Afseth, Nils Kristian; Knutsen, Svein Halvor; Staerk, Dan; Wubshet, Sileshi Gizachhew; 2019: Peptides from chicken processing by-product inhibit DPP-IV and promote cellular glucose uptake: potential ingredients for T2D management
Kòsa, Gergely; Zimmermann, Boris; Kohler, Achim; Ekeberg, Dag; Afseth, Nils Kristian; Mounier, Jerome; Shapaval, Volha; 2018: High-throughput screening of Mucoromycota fungi for production of low- and high-value lipids
Kòsa, Gergely; Vuoristo, Kiira; Horn, Svein Jarle; Zimmermann, Boris; Afseth, Nils Kristian; Kohler, Achim; Shapaval, Volha; 2018: Assessment of the scalability of a microtiter plate system for screening of oleaginous microorganisms
Tzimorotas, Dimitrios; Afseth, Nils Kristian; Lindberg, Diana; Kjørlaug, Oda Marie; Axelsson, Lars; Shapaval, Volha; 2018: Pretreatment of different food rest materials for bioconversion into fungal lipid-rich biomass
Palafox, Mauricio Alcolea; Kattan, Danny; Afseth, Nils Kristian; 2018: FT-IR spectra of the anti-HIV nucleoside analogue d4T (Stavudine). Solid state simulation by DFT methods and scaling by different procedures
Wubshet, Sileshi Gizachhew; Wold, Jens-Petter; Afseth, Nils Kristian; Böcker, Ulrike; Lindberg, Diana; Ihunegbo, Felicia Nkem; Måge, Ingrid; 2018: Feed-Forward Prediction of Product Qualities in Enzymatic Protein Hydrolysis of Poultry By-Products: a Spectroscopic Approach
Aspevik, Tone; Oterhals, Åge; Rønning, Sissel Beate; Altintzoglou, Themistoklis; Wubshet, Sileshi Gizachhew; Gildberg, Asbjørn; Afseth, Nils Kristian; Whitaker, Ragnhild; Lindberg, Diana; 2018: Valorization of Proteins from Co- and By-Products from the Fish and Meat Industry
Nirea, Kahsay Gebremariam; Nanclares, Marta Perez de; Skugor, Adrijana; Afseth, Nils Kristian; Meuwissen, Theo; Hansen, Jon Øvrum; Mydland, Liv Torunn; Øverland, Margareth; 2018: Assessment of fecal near-infrared spectroscopy to predict feces chemical composition and apparent total-tract digestibility of nutrients in pigs
Kòsa, Gergely; Kohler, Achim; Tafintseva, Valeria; Zimmermann, Boris; Forfang, Kristin; Afseth, Nils Kristian; Tzimorotas, Dimitrios; Vuoristo, Kiira; Horn, Svein Jarle; Jerome, Mounier; Shapaval, Volha; 2017: Microtiter plate cultivation of oleaginous fungi and monitoring of lipogenesis by high-throughput FTIR spectroscopy
Aguilar-Hernández, Iris; Afseth, Nils Kristian; López-Luke, Tzarara; Contreras-Torres, Flavio F.; Wold, Jens-Petter; Ornelas-Soto, Nancy; 2017: Surface enhanced Raman spectroscopy of phenolic antioxidants: A systematic evaluation of ferulic acid, p-coumaric acid, caffeic acid and sinapic acid
Aspevik, Tone; Oterhals, Åge; Rønning, Sissel Beate; Altintzoglou, Themistoklis; Wubshet, Sileshi Gizachhew; Gildberg, Asbjørn; Afseth, Nils Kristian; Whitaker, Ragnhild; Lindberg, Diana; 2017: Valorization of Proteins from Co- and By-Products from the Fish and Meat Industry
Böcker, Ulrike; Wubshet, Sileshi Gizachhew; Lindberg, Diana; Afseth, Nils Kristian; 2017: Fourier-transform infrared spectroscopy for characterization of protein chain reductions in enzymatic reactions
Wubshet, Sileshi Gizachhew; Måge, Ingrid; Böcker, Ulrike; Lindberg, Diana; Knutsen, Svein Halvor; Rieder, Anne; Airado-Rodriguez, Diego; Afseth, Nils Kristian; 2017: FTIR as a rapid tool for monitoring molecular weight distribution during enzymatic protein hydrolysis of food processing by-products
Vang, Birthe; Altintzoglou, Themistoklis; Måge, Ingrid; Wubshet, Sileshi Gizachhew; Afseth, Nils Kristian; Whitaker, Ragnhild; 2017: Peptide recovery and commercialization by enzymatic hydrolysis of marine biomass
Kòsa, Gergely; Kohler, Achim; Tafintseva, Valeria; Zimmermann, Boris; Forfang, Kristin; Tzimorotas, Dimitris; Afseth, Nils Kristian; Tzimorotas, Dimitrios; Vuoristo, Kiira; Horn, Svein Jarle; Mounier, Jerome; Shapaval, Volha; 2017: Microtiter plate cultivation of oleaginous fungi and monitoring of lipogenesis by high-throughput FTIR spectroscopy
Ornelas-Soto, Nancy; Aguilar-Hernández, Iris; Afseth, Nils Kristian; López-Luke, Tzarara; Contreras-Torres, Flavio F.; Wold, Jens-Petter; 2017: Ultrasensitive detection of phenolic antioxidants by surface enhanced Raman spectroscopy
Helgerud, Trygve; Schüller, Reidar Barfod; Dessev, Tzvetelin; Rukke, Elling-Olav; Knutsen, Svein Halvor; Afseth, Nils Kristian; Ballance, Simon; 2016: Mixing properties and rheological characteristics of dough used to make potato-cereal soft wraps
Helgerud, Trygve; Knutsen, Svein Halvor; Afseth, Nils Kristian; Stene, Kim Frode; Stene, Kim Frode; Rukke, Elling-Olav; Ballance, Simon; 2016: Evaluation of Hand-Held Instruments for Representative Determination of Glucose in Potatoes
Liland, Kristian Hovde; Kohler, Achim; Afseth, Nils Kristian; 2016: Model-based pre-processing in Raman spectroscopy of biological samples
Kumar, Rajesh; Singh, Gajendra Pratap; Grønhaug, Kirsten Marie; Afseth, Nils Kristian; Davies, Catharina De Lange; Drogset, Jon Olav; Lilledahl, Magnus Borstad; 2015: Single Cell Confocal Raman Spectroscopy of Human Osteoarthritic Chondrocytes: A Preliminary Study
Helgerud, Trygve; Wold, Jens-Petter; Pedersen, Morten Bøhler; Pedersen, Morten Bøhler; Liland, Kristian Hovde; Ballance, Simon; Knutsen, Svein Halvor; Rukke, Elling-Olav; Afseth, Nils Kristian; 2015: Towards on-line prediction of dry matter content in whole unpeeled potatoes using near-infrared spectroscopy
Conti, Claudia; Realini, Marco; Colombo, Chiara; Sowoidnich, Kay; Afseth, Nils Kristian; Bertasa, Moira; Botteon, Alessandra; Matousek, Pavel; 2015: Noninvasive analysis of thin turbid layers using microscale spatially offset Raman spectroscopy
Martin, Adam Dunstan; Afseth, Nils Kristian; Kohler, Achim; Randby, Åshild T.; Eknæs, Margrete; Waldmann, Andres; Dørum, Guro; Måge, Ingrid; Reksen, Olav; 2015: The relationship between fatty acid profiles in milk identified by Fourier transform infrared spectroscopy and onset of luteal activity in Norwegian dairy cattle
Kumar, Rajesh; Grønhaug, Kirsten Marie; Afseth, Nils Kristian; Isaksen, vidar; Davies, Catharina De Lange; Davies, Catharina De Lange; Drogset, Jon Olav; Lilledahl, Magnus Borstad; 2015: Optical investigation of osteoarthritic human cartilage (ICRS grade) by confocal Raman spectroscopy: a pilot study
Afseth, Nils Kristian; Bloomfield, Matthew; Wold, Jens-Petter; Matousek, Pavel; 2014: A novel approach for subsurface through-skin analysis of salmon using spatially offset raman spectroscopy (sors)
Shapaval, Volha; Afseth, Nils Kristian; Vogt, Kjell Gjermund; Kohler, Achim; 2014: Fourier transform infrared spectroscopy for the prediction of fatty acid profiles in Mucor fungi grown in media with different carbon sources
Urban, Jan; Afseth, Nils Kristian; Štys, Dalibor; 2014: Fundamental definitions and confusions in mass spectrometry about mass assignment, centroiding and resolution
Monavar, H. Mohamadi; Afseth, Nils Kristian; Lozano, J; Alimardani, R.; Omid, M.; Wold, Jens-Petter; 2013: Determining quality of caviar from Caspian Sea based on Raman spectroscopy and using artificial neural networks
Najbjerg, Heidi; Young, Jette F.; Bertram, Hanne C.; Afseth, Nils Kristian; Høst, Vibeke; Kohler, Achim; 2013: High-throughput FTIR spectroscopy of intact HepG2 cells reveals additive and non-additive effects of individual fatty acids when given as mixtures
Næs, Tormod; Tomic, Oliver; Afseth, Nils Kristian; Segtnan, Vegard; Måge, Ingrid; 2013: Multi-block regression based on combinations of orthogonalisation, PLS-regression and canonical correlation analysis
Perisic, Nebojsa; Afseth, Nils Kristian; Ofstad, Ragni; Hassani, Sahar; Kohler, Achim; 2013: Characterising protein, salt and water interactions with combined vibrational spectroscopic techniques
Perisic, Nebojsa; Afseth, Nils Kristian; Ofstad, Ragni; Nilsen, Bjørg Narum; Kohler, Achim; 2013: Characterizing salt substitution in beef meat processing by vibrational spectroscopy and sensory analysis
Perisic, Nebojsa; Afseth, Nils Kristian; Ofstad, Ragni; Scheel, Jan; Kohler, Achim; 2013: FTIR Imaging for Structural Analysis of Frankfurter Sausages Subjected to Salt Reduction and Salt Substitution
Afseth, Nils Kristian; Kohler, Achim; 2012: Extended multiplicative signal correction in vibrational spectroscopy, a tutorial
Helgerud, Trygve; Segtnan, Vegard; Wold, Jens-Petter; Ballance, Simon; Knutsen, Svein Halvor; Rukke, Elling-Olav; Afseth, Nils Kristian; 2012: Near-infrared Spectroscopy for Rapid Estimation of Dry Matter Content in Whole Unpeeled Potato Tubers
Najbjerg, Heidi; Afseth, Nils Kristian; Young, Jette F.; Bertram, Hanne; Pedersen, Mona Elisabeth; Grimmer, Stine J Staavi; Vogt, Kjell Gjermund; Kohler, Achim; 2011: Monitoring cellular responses upon fatty acid exposure by Fourier transform infrared spectroscopy and Raman spectroscopy
Perisic, Nebojsa; Afseth, Nils Kristian; Ofstad, Ragni; Kohler, Achim; 2011: Monitoring Protein Structural Changes and Hydration in Bovine Meat Tissue Due to Salt Substitutes by Fourier Transform Infrared (FTIR) Microspectroscopy
Afseth, Nils Kristian; Böcker, Ulrike; 2010: Raman and Infrared Imaging of Foods
Afseth, Nils Kristian; Martens, Harald; Randby, Åshild T.; Gidskehaug, Lars; Nilsen, Bjørg Narum; Jørgensen, Kjetil; Lien, Sigbjørn; Kohler, Achim; 2010: Predicting the Fatty Acid Composition of Milk: A Comparison of Two Fourier Transform Infrared Sampling Techniques
Berget, Ingunn; Martens, Harald; Kohler, Achim; Sjurseth, Siri Kulberg; Afseth, Nils Kristian; Nilsen, Bjørg Narum; Ådnøy, Tormod; Lien, Sigbjørn; 2010: Caprine CSN1S1 haplotype effect on gene expression and milk composition measured by Fourier transform infrared spectroscopy
Kohler, Achim; Afseth, Nils Kristian; Martens, Harald; 2010: Chemometrics in biospectroscopy
Perez-Juan, Maria; Afseth, Nils Kristian; Gonzalez, Joel; Diaz, Isabel; Gispert, Marina; Furnols, Maria; Oliver, M. Angels; Realini, Carolina E.; 2010: Prediction of fatty acid composition using a NIRS fibre optics probe at two different locations of ham subcutaneous fat
Kohler, Achim; Afseth, Nils Kristian; Jørgensen, Kjetil; Randby, Åshild T.; Martens, Harald; 2010: Quality analysis of milk by vibrational spectroscopy
Lind, Vibeke; Berg, Jan; Eik, Lars Olav; Eilertsen, Svein; Mølmann, Jørgen A; Hersleth, Margrethe; Afseth, Nils Kristian; Haugland, Espen; 2009: Effects of concentrate or ryegrass-based diets (Lolium multiflorum) on the meat quality of lambs grazing on semi-natural pastures
Mørkved, Eva Henmo; Pedersen, Frank Marton; Afseth, Nils Kristian; Kjøsen, Helge; 2008: Cyclotetramerisations of sulfanyl substituted pyrazine-2,3-dicarbonitriles and phthalonitriles
Afseth, Nils Kristian; Segtnan, Vegard; Segtnan, Vegard; Wold, Jens-Petter; Marquardt, B.; 2007: A chromatographic approach for fluorescence reduction in liquid Raman analysis
Martens, Harald; Kohler, Achim; Afseth, Nils Kristian; Wold, Jens-Petter; Hersleth, Margrethe; Berget, Ingunn; Ådnøy, Tormod; Skaugen, Morten; Isaksson, Tomas; Vegarud, Gerd Elisabeth; Criscione, Andrea; Mevik, Bjørn-Helge; Frøst, M.B.; Randby, Åshild T.; Prestløkken, Egil; Berg, Paul Ragnar; Kent, Matthew Peter; Lien, Sigbjørn; Omholt, Stig W.; 2007: High-throughput Measurements for Functional Genomics of Milk
Mørkved, Eva Henmo; Afseth, Nils Kristian; Zimcik, Petr; 2007: Azaphtalocyanines with extended conjugation through heteroaryl and aryl substituents. Photochemical and photophysical properties
Westad, Frank; Afseth, Nils Kristian; Bro, Rasmus; 2007: Finding relevant spectral regions between spectroscopic techniques by use of cross model validation and partial least squares regression
Afseth, Nils Kristian; 2007: Vibrational spectroscopy and chemometrics for rapid and reliable characterisation of food - A few aspects concerning Raman spectroscopy
Mørkved, Eva Henmo; Afseth, Nils Kristian; Zimcik, Petr; 2007: Azaphthalocyanines with extended conjugation through heteroaryl and aryl substituents. Photochemical and photophysical properties
Afseth, Nils Kristian; Segtnan, Vegard; Marquardt, BJ; Wold, Jens-Petter; 2006: Raman spectra of biological samples: A study of preprocessing methods
Afseth, Nils Kristian; Wold, Jens-Petter; Segtnan, Vegard; 2006: The potential of Raman spectroscopy for characterisation of the fatty acid unsaturation of salmon
Mørkved, Eva Henmo; Afseth, Nils Kristian; Kjøsen, Helge; 2006: Zn(quinoline)2Cl2: an efficient reagent for synthesis of zinc azaphthalocyanines with thimorpholine- or pyrazole substituents
Afseth, Nils Kristian; Segtnan, Vegard; Marquardt, BJ; Wold, Jens-Petter; 2005: Raman and near-infrared spectroscopy for quantification of fat composition in a complex food model system
Nils Kristian has 13 other publications in Cristin:
Wold, Jens-Petter; Afseth, Nils Kristian; 2017: Smarte sensorer gir best utnyttelse av maten
Wold, Jens-Petter; Afseth, Nils Kristian; 2017: Smarte sensorer gir best utnyttelse av maten vår
Molteberg, Eldrid Lein; Johansen, Tor Jacob; Eikemo, Håvard; Afseth, Nils Kristian; Ballance, Simon; 2017: Sluttrapport for prosjekt: Økt konkurransekraft for norske poteter (2013-2017). Internt dokument til referansegruppa
Aspevik, Tone; Oterhals, Åge; Rønning, Sissel Beate; Altintzoglou, Themistoklis; Wubshet, Sileshi Gizachhew; Gildberg, Asbjørn; Afseth, Nils Kristian; Whitaker, Ragnhild; Lindberg, Diana; 2017: Erratum to: Valorization of Proteins from Co- and By-Products from the Fish and Meat Industry (Top Curr Chem (Z), (2017), 375, (53), 10.1007/s41061-017-0143-6)
Afseth, Nils Kristian; Lindberg, Diana; 2016: Forskerne finner de beste proteinene i restråstoff
Afseth, Nils Kristian; Moren, Mari; Whitaker, Ragnhild; 2016: Proteiner med potensial
Afseth, Nils Kristian; Bloomfield, Matthew; Wold, Jens-Petter; Matousek, Pavel; 2014: Emerging sampling approaches for Raman analysis of foods
Afseth, Nils Kristian; Shapaval, Volha; 2014: Restråstoff - ny proteinkilde
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: Low salt products Final report
Afseth, Nils Kristian; Larat, V; 2013: Application note: Raman characterization of fat composition
Afseth, Nils Kristian; Helgerud, Trygve; 2012: Mer enhetlig potetkvalitet
Afseth, Nils Kristian; Helgerud, Trygve; 2012: Mer enhetlig potetkvalitet
Heia, Karsten; Wold, Jens-Petter; Afseth, Nils Kristian; 2009: Status på instrumentering for objektiv kvalitetsdifferensiering av lakseprodukter
