Academic article

• Folkvord, Arild; Koedijk, Roland; Grahl-Nielsen, Otto et al. (2018). You are what you eat? Differences in lipid composition of cod larvae reared on natural zooplankton and enriched rotifers. (external link)
• Radnaeva, Larisa D.; Popov, Dmitry V.; Grahl-Nielsen, Otto et al. (2017). Fatty acid composition in the white muscle of Cottoidei fishes of Lake Baikal reflects their habitat depth. (external link)
• Joensen, Horaldur; Grahl-Nielsen, Otto (2014). Distinction among North Atlantic cod Gadus morhua stocks by tissue fatty acid profiles. (external link)
• Olsen, Siri Aaserud; Ervik, Arne S; Grahl-Nielsen, Otto (2012). Tracing fish farm waste in the northern shrimp Pandalus borealis (Kroyer, 1838) using lipid biomarkers. (external link)
• Jacobsen, Anita; Grahl-Nielsen, Otto; Magnesen, Thorolf (2012). Effects of reduced diameter of bag cultures on content of essential fatty acids and cell density in a continuous algal production system. (external link)
• Averina, E.S.; Grahl-Nielsen, Otto; Bazarsadueva, S.V. et al. (2011). Transformation through the food chain of Lake Baikal hydrobionts fatty acids. (external link)
• Grahl-Nielsen, Otto; Haug, Tore; Lindstrøm, Ulf et al. (2011). Fatty acids in harp seal blubber do not necessarily reflect their diet. (external link)
• Jacobsen, Anita; Grahl-Nielsen, Otto; Magnesen, Thorolf (2011). Effects of reduced diameter of bag cultures on content of essential fatty ascids and cell density in a continous algal production system. (external link)
• Minzangi, K; Kaaya, AN; Kansiime, F et al. (2011). Fatty acid composition of seed oils from selected wild plants of Kahuzi-Biega National Park and surroundings, Democratic Republic of Congo. (external link)
• Kwetegyeka, Justus; Masa, J; Kiremire, Bernard T et al. (2011). Fatty acids of polar lipids in heart tissue are good taxonomic markers for tropical African freshwater fish. (external link)
• Grahl-Nielsen, Otto; Averina, E.; Pronin, Nikolai et al. (2011). Fatty acid profiles in different fish species in Lake Baikal. (external link)
• Grahl-Nielsen, Otto; Krakstad, Jens-Otto; Nøttestad, Leif et al. (2010). Dusky dolphins Lagenorhynchus obscurus and Cape fur seals Arctocephalus pusillus pusillus: fatty acid composition of their blubber and prey species. (external link)
• Grahl-Nielsen, Otto; Glover, Kevin Alan (2010). Fatty acids in fish scales. (external link)
• Jacobsen, Anita; Grahl-Nielsen, Otto; Magnesen, Thorolf (2010). Does a large-scale continuous algal production system provide a stable supply of fatty acids to bivalve hatcheries?. (external link)
• Grahl-Nielsen, Otto; Jacobsen, Anita; Christophersen, Gyda et al. (2010). Fatty acid composition in adductor muscle of juvenile scallops (Pecten maximus) from five Norwegian populations reared in the same environment. (external link)
• Skoglund, Eli; Lydersen, Christian; Grahl-Nielsen, Otto et al. (2010). Fatty acid composition of the blubber and dermis of adult male Atlantic walruses (Odobenus rosmarus rosmarus) in Svalbard, and their potential prey. (external link)
• Olsen, Siri Aaserud; Ervik, Arne; Grahl-Nielsen, Otto (2009). Deep-water shrimp (Pandalus borealis, Kroyer 1838) as indicator organism for fish-farm waste. (external link)
• Olsen, Bernt Rydland; Grahl-Nielsen, Otto; Schander, Christoffer (2009). Population study of Astarte sulcata, da Costa, 1778, (Mollusca, Bivalvia) from two Norwegian fjords based on the fatty acid composition of the adductor muscle. (external link)
• Kwetegyeka, Justus; Mpango, George; Grahl-Nielsen, Otto (2008). Variation in Fatty Acid Composition in Muscle and Heart Tissues among Species and Populations of Tropical Fish in Lakes Victoria and Kyoga. (external link)
• Strandberg, Ursula; Käkelä, Anne; Lydersen, Christian et al. (2008). Stratification, composition, and function of marine mammal blubber: The ecology of fatty acids in marine mammals. (external link)
• Mjøs, Svein Are; Meier, Sonnich; Grahl-Nielsen, Otto (2006). Geometrical isomerisation of double bonds in acid catalysed preparation of fatty acid methyl esters. (external link)
• Mjøs, Svein Are; Meier, Sonnich; Grahl-Nielsen, Otto (2006). Geometrical isomerisation of double bonds in acid-catalysed preparation of fatty acid methyl esters. (external link)
• Kwetegyeka, Justus; Mpango, George; Grahl-Nielsen, Otto (2006). Fatty acid composition of muscle and heart tissue of Nile perch, Lates niloticus, and Nile tilapia, Oreochromis niloticus, from various populations in Lakes Victoria and Kioga, Uganda. (external link)
• Mjøs, Svein Are; Grahl-Nielsen, Otto (2006). Prediction of gas chromatographic retention of polyunsaturated fatty acid methyl esters. (external link)
• Meier, Sonnich; Mjøs, Svein Are; Joensen, Horaldur et al. (2006). Validation of a one-step extraction/methylation method for determination of fatty acids and cholesterol in marine tissues. (external link)
• Grahl-Nielsen, Otto; Halvorsen, Ann-Kristin; Bodoev, Nikolai et al. (2005). Fatty acid composition of blubber of the Baikal seal Phoca sibirica and its marine relative, the ringed seal P. hispida. (external link)
• Birkeland, Annette; Kovacs, Kit M.; Lydersen, Christian et al. (2005). Transfer of fatty acids from mothers to their calves during lactation in white whales Delphinapterus leucas. (external link)
• Troedsson, Christofer; Grahl-Nielsen, Otto; Thompson, Eric (2005). Variable fatty acid composition of the pelagic appendicularian Oikopleura dioica in response to dietary quality and quantity. (external link)
• Andersen, Signe; Lydersen, Christian; Grahl-Nielsen, Otto et al. (2004). Autumn diet of harbour seals (Phoca vitulina) at Prins Karls Forland, Svalbard, assessed via scat and fatty-acid analyses. (external link)
• Grahl-Nielsen, Otto; Andersen, Magne; Andersen, M et al. (2004). Fatty acid composition of the adipose tissue of polar bears and of their prey: ringed seals, bearded seals and harp seals. (external link)
• Joensen, Horaldur; Grahl-Nielsen, Otto (2004). Stock structure of Sebastes mentella in the North Atlantic revealed by chemometry of the fatty acid profile in heart tissue. (external link)
• Grahl-Nielsen, Otto; Andersen, Magnus; Derocher, Andrew et al. (2003). Fatty acid composition of the adipose tissue of polar bears and their prey: ringed seals, bearded seals and harp seals. (external link)
• Olsen, Erik Joel Steinar; Grahl-Nielsen, Otto (2003). Blubber fatty acids of minke whales: stratification, population identification and relation to diet. (external link)
• Birkely, Sten-Richard; Grahl-Nielsen, Otto; Gulliksen, Bjørn (2003). Temporal variations and anatomical distributions of fatty acids in the bivalve Mya truncata, L. 1758, from Isfjorden, Spitsbergen. (external link)
• Joensen, Horaldur; Grahl-Nielsen, Otto (2001). The redfish species Sebastes viviparus, Sebastes marinus and Sebastes mentella have different composition of their tissue fatty acids. (external link)
• Joensen, Horaldur; Grahl-Nielsen, Otto (2000). Discrimination of Sebastes viviparus, S. marinus and S. mentella from Faroe Islands by chemometry of the fatty acid profile in heart and gill tissues and in the skull oil. (external link)
• Johnsen, R.I.; Grahl-Nielsen, Otto; Roem, A. (2000). Relative absorption of fatty acids by Atlantic salmon Salmo salar from different diets, as evaluated by multivariate statistics. (external link)
• Grahl-Nielsen, Otto; Hammill, M.O.; Lydersen, C. et al. (2000). Transfer of fatty acids from female seal bluber via milk to pup blubber. (external link)
• Julshamn, K.; Grahl-Nielsen, Otto (2000). Trace element levels in harp seal (Pagophilus groenlandicus) and hooded seal (Crystophora cristata) from the Greenland Sea. A multivariate approach. (external link)
• Joensen, Horaldur; Steingrund, P.; Fjallstein, I. et al. (2000). Discrimination between two reared stocks of cod (Gadus morhua) from Faroe Islands by chemometry of the fatty acid composition in the heart tissue. (external link)
• Julshamn, Kåre; Grahl-Nielsen, Otto (1996). Distribution of trace elements from industrial discharges in the Hardangerfjord, Norway. A multivariate data analysis of saithe, flounder and blue mussel as sentinel organisms. (external link)
• Folkvord, Arild; Haaland, Inger Margrethe; Grahl-Nielsen, Otto et al. (1996). Fatty acid composition of herring (Clupea harengus L.) larvae off western Norway. (external link)
• Slimestad, R.; Gjelsvik, S.; Grahl-Nielsen, Otto (1995). Detection of effects of ozone on birch, Betula pendula Roth., by chemometrical evaluation of concentrations of lipid components in leaves. (external link)
• Grahl-Nielsen, Otto; Mjaavatten, Olav; Tvedt, E. (1993). Distinguishing between populations of the harp seal Pagophilus groenlandicus (Erxleben 1777), by chemometry of the fatty acid profile in selected tissues. (external link)
• Johnsen, R. I.; Grahl-Nielsen, Otto; Lunestad, B. T. (1993). Environmental distribution of organic waste from a marine fish farm. (external link)
• Cooney, J. J.; Doolittle, M. M.; Grahl-Nielsen, Otto et al. (1993). Fatty acids in marine fungi. (external link)
• Barnung, Trygg Normann; Grahl-Nielsen, Otto (1989). DETERMINATION OF BENZENES AND NAPHTHALENES IN WATER BY PURGE AND TRAP ISOLATION AND CAPPILLARY COLUMN CHROMATOGRAPHY. (external link)
• Barnung, Trygg Normann; Grahl-Nielsen, Otto (1987). The fatty acid profile in cod (Gadus morhua L.) eggs and larvae. Developmental variations and responses to oil pollution. (external link)
• Grahl-Nielsen, Otto; Barnung, Trygg Normann (1985). Variations in the Fatty Acid Profile of Marine Animals Caused by Environmental and Developmental Changes. (external link)

Academic chapter/article/Conference paper

• Rosenbaum, Paul-Erik Lillholm; Mikalsen, Øyvind; Grahl-Nielsen, Otto (2010). The learning effect of using a blended learning design in K12 science teaching. (external link)
• Grahl-Nielsen, Otto; Aarflot, Asbjørn (2004). Kjemi på nett. (external link)
• Grahl-Nielsen, Otto (2004). Fatty acid profiles as natural marks for stock identification. (external link)
• Båmstedt, Ulf; Fyhn, Hans Jørgen; Martinussen, Monica Bente et al. (2004). Seasonal distribution, diversity and biochemical composition of appendicularians in Norwegian fjords. (external link)
• Øvstedal, Dag Olav; Fossen, Torgils; Grahl-Nielsen, Otto et al. (2000). Beskrivelse av den trolig eldste norske påskeliljekultivar, basert på kjemiske, morfologiske og cytologiske undersøkelser. (external link)

Reader opinion piece

• Grahl-Nielsen, Otto (2009). Exploration of the foraging ecology of marine mammals by way of the fatty acid composition of their blubber. (external link)

Academic lecture

• Grahl-Nielsen, Otto; Christophersen, Gyda; Jacobsen, Anita et al. (2008). Identification of Pecten maximus populations in Norway by muscle fatty acid profiles. (external link)
• Grahl-Nielsen, Otto (2004). Fatty acid profiles as natural marks for stock identification. (external link)
• Grahl-Nielsen, Otto; Halvorsen, Ann-Kristin (2004). Stratification of the blubber of marine mammals. (external link)
• Grahl-Nielsen, Otto (2004). Fatty acid composition of the blubber of the Baikal seal (Phoca Sibirica) and in the blubber of its marine relative, the ringed seal (Phoca hispida). (external link)
• Grahl-Nielsen, Otto (2002). Taxonomic and nutritional studies on marine fish and mammals by determination of tissue fatty acid composition. (external link)
• Grahl-Nielsen, Otto (2002). Eksempler på akvakulturelle problemer som er løst ved hjelp av kromatografiske metoder. (external link)
• Halvorsen, Ann-Kristin; Derocher, Andrew; Andersen, Magnus et al. (2002). Fettsyresammensetningen i spekket til isbjørn. (external link)
• Grahl-Nielsen, Otto (2002). Chemometric determination of fatty acids inmarine organisms by high resolution gas chromatography followed by multivariate statistics. (external link)
• Olsen, Erik Joel Steinar; Grahl-Nielsen, Otto (2001). Spatial and temporal trends in blubber fatty acids of Northeastern Atlantic. (external link)
• Grahl-Nielsen, Otto (2001). Blubber fatty acids in marine mammals. (external link)
• Grahl-Nielsen, Otto (2001). Summary of factors that could potentially confound the interpretation of fatty acid composition and a summary of laboratory and field studies dealing with fatty aqcid composition analysis. (external link)
• Grahl-Nielsen, Otto (2001). Nettbasert kjemiundervisning. Erfaringer og pedagogiske refleksjoner. (external link)
• Grahl-Nielsen, Otto (2001). Taxonomic and dietary information from the fatty acid composition of the blubber of marine mammals. (external link)
• Grahl-Nielsen, Otto (2001). Nettforelesninger i generell kjemi. (external link)
• Grahl-Nielsen, Otto (2000). Nettforelesninger i generell kjemi. (external link)
• Grahl-Nielsen, Otto (2000). Informasjons- og kommunikasjonsteknologi (IKT) i undervisning og veiledning. (external link)
• Furmanek, Tomasz; Grahl-Nielsen, Otto (2000). Nettkollokvering og orakeltjeneste. (external link)
• Furmanek, Tomasz; Grahl-Nielsen, Otto (2000). Lynkurs i Flash. (external link)
• Grahl-Nielsen, Otto (1999). Analytiske utfordringer ved bestemmelse av hormonhermende miljøgifter. (external link)
• Løvseth, Eva Kristin; Fremmersvik, Gro; Grahl-Nielsen, Otto (1998). Analyse av flyktige komponenter i sigevann fra 10 avfallsdeponier i Hordaland. (external link)
• Grahl-Nielsen, Otto; Lygre, Terje (1998). Problemer med presisjonen ved GC-analyse av kompliserte blandinger. (external link)
• Grahl-Nielsen, Otto (1998). Bestandsidentifikasjon ved hjelp av fettsyreprofiler. (external link)
• Fremmersvik, Gro; Løvseth, Eva Kristin; Grahl-Nielsen, Otto (1998). Fenoler i sigevann fra 10 avfallsdeponier i Hordaland. (external link)
• Grahl-Nielsen, Otto (1998). Sigevann fra avfallsdeponier og produsert vann fra oljeplattformer. (external link)
• Joensen, Horaldur; Grahl-Nielsen, Otto (1998). Taksonomi vha fettsyreprofiler. (external link)
• Bratteteig, Svein; Grahl-Nielsen, Otto (1998). Sildelarvens første levedager. (external link)
• Abelseth, Kari Helene; Sørland, Lindy; Grahl-Nielsen, Otto (1998). Endring av fettsyresammensetningen ved oksidasjon av marine oljer. (external link)
• Aas, Petter; Grahl-Nielsen, Otto; Holmsen, Holm A (1998). Derivatisering av fosfolipider og HPLC-analyse av molekylformer av utvalgte fosfolipider. (external link)
• Bratteteig, Svein; Grahl-Nielsen, Otto (1998). Sildelarvens første levedager. (external link)
• Legreid, Geir; Grahl-Nielsen, Otto (1998). Oljefilm på overflaten som følge av utslipp fra produksjonsplattformer. (external link)
• Sørland, Lindy; Abelseth, Kari Helene; Grahl-Nielsen, Otto (1998). Flyktige forbindelser som dannes ved oksidasjon av marine oljer. (external link)
• Grahl-Nielsen, Otto (1997). Lipider hos Mya truncata på Svalbard oljeinstellasjoner på norsk sokkel. (external link)
• Grahl-Nielsen, Otto (1997). Når analyseresultatene behandles med flervariabel statistikk vil utbyttet av miljøundersøkelsene bli mangedoblet. (external link)
• Grahl-Nielsen, Otto (1997). Rasjonaliseringen av den kjemiske overvåkningen rundt oljeinstellasjoner på norsk sokkel. (external link)

Poster

• Skoglund, Eli; Kovacs, Kit; Lydersen, Christian et al. (2005). Fatty acid composition of the skin and blubber, and potential prey organisms of walruses Odobenys rosmarus. (external link)
• Krakstad, Jens-Otto; Halvorsen, Ann-Kristin; Nøttestad, Leif et al. (2004). Dusky dolphins (Lagenorhynchus obscurus): Fatty acid composition of their blubber and of their prey. (external link)
• Krakstad, Jens-Otto; Halvorsen, Ann-Kristin; Nøttesstad, Leif et al. (2003). Dusky Dolphins (Lagenorhynchus obscurus): Fatty acid composition of their blubber and of their prey. (external link)
• Halvorsen, Ann-Kristin; Grahl-Nielsen, Otto; Olsen, Erik Joel Steinar (2001). The fatty acid composition of the blubber of fetuses and female minke whales. (external link)
• Birkeland, Annette; Grahl-Nielsen, Otto; Kovacs, Kit M. et al. (2001). Mother to pup transfer of fatty acids in three seal species: harbor seal (Phoca vitulina), harp seal (Phoca groenlandica) and hooded seal (Cystophora cristata). (external link)
• Derocher, Andrew; Andersen, Magnus; Kovacs, Kit M. et al. (2001). Fatty acid composition of the blubber of polar bears (Ursus maritimus) and of their prey, ringed seals (Phoca vitulina), bearded seals (Erignathus barbatus) and harp seals (Phoca groenlandica). (external link)
• Folkvord, Arild; Haaland, Inger Margrethe; Grahl-Nielsen, Otto et al. (1994). Fatty acid composition of herring (Clupea harengus L.) larvae from two different spawning sites. (external link)

Letter to the editor

• Grahl-Nielsen, Otto; Andersen, Magnus; Derocher, Andrew E. et al. (2004). Reply to Comment on Grahl-Nielsen et al. (2003): sampling, data treatment and predictions in investigations on fatty acids in marine mammals. (external link)

Digital learning tools

• Grahl-Nielsen, Otto (2004). Hydrogen istedenfor bensin?. (external link)

Thesis at a second degree level

• Fløtre, Anne lise; Grahl-Nielsen, Otto (2004). Fettsyrer i vågehval. Balaenoptera acutorostrata - en multivariat analyse av spekket. (external link)

Popular scientific lecture

• Grahl-Nielsen, Otto (1999). Nettundervisning i begynneremnet i kjemi. (external link)
• Grahl-Nielsen, Otto (1997). Presentasjon av K101. (external link)
• Grahl-Nielsen, Otto (1997). Dra til sjøs, for der er mye kjemi. (external link)
• Grahl-Nielsen, Otto (1996). Early detection of oxidation of marine oils by chemometric determination of changes in fatty acid composition. (external link)
• Grahl-Nielsen, Otto (1994). Marine mammalian fatty acids: A source of information. (external link)
• Grahl-Nielsen, Otto (1994). Feite tider. (external link)

Report

• Botnen, Helge; Hjohlman, Staffan; Mjaavatten, Olav et al. (1998). Overvåking av marinbiologiske forhold ved Statoils raffineri på Mongstad i 1997. (external link)
• Tvedten, Øyvind F.; Grahl-Nielsen, Otto; Mjaavatten, Olav et al. (1997). Undersøkelse av miljøforhold utenfor Norsk Blikkvalseverk AS. (external link)
• Tvedten, Øyvind F.; Botnen, Helge; Johannessen, Per J et al. (1996). Miljøundersøkelse ved Norsk Blikkvalseverk. (external link)
• Tvedten, Øyvind F.; Grahl-Nielsen, Otto; Botnen, Helge et al. (1996). Miljøundersøkelse ved Eide avfallsplass, Fjell kommune. (external link)
• Botnen, Helge; Øyvind F. Tvedten, [Mangler fornavn]; Grahl-Nielsen, Otto et al. (1996). Miljøundersøkelse i Dalabukta og Kristiansund havneområde. (external link)
• Botnen, Helge; Grahl-Nielsen, Otto; Mjaavatten, Olav et al. (1996). Tungmetall og oljehydrokarboner i blåskjell fra Mongstadområdet i 1996. (external link)
• Botnen, Helge; Årrestad, Knut; Grahl-Nielsen, Otto et al. (1994). Overvåkning av marinbiologiske forhold ved Statoils raffineri på Mongstad i 1994. (external link)
• Botnen, Helge; Årestad, K.; Grahl-Nielsen, Otto et al. (1994). Overvåkning av marinbiologiske forhold ved Statoils raffineri på Mongstad i 1994. (external link)
• Botnen, Helge; Hjohlman, Staffan; Tvedten, Øyvind F. et al. (1993). Overvåking av marinbiologiske forhold ved Norsk Hydro AS sitt anlegg på Sture i Øygarden 1993. (external link)
• Johannessen, Per J; Botnen, Helge; Hjohlman, S. et al. (1992). Overvåking av marinbiologiske forhold ved Statoil's raffineri på Mongstad 1991. (external link)
• Johannessen, Per J; Risheim, I.; Botnen, Helge et al. (1991). Overvåking av marinbiologiske forhold ved Statoil's raffineri på Mongstad. IFM Rapport 29. (external link)
• Aure, Jan; Grahl-Nielsen, Otto; Sundby, Svein (1979). Spredning av olje-holdig avløpsvann i Fensfjorden fra oljeraffineriet på Mongstad. (external link)

See a complete overview of publications in Cristin.