Åge Oterhals

I am employed as a senior scientist in Nofima. My main interests are within marine and industrial biotechnology, feed technology, process optimization and effect of process conditions on product quality. Present research activities include physicochemical characterization of protein ingredients related to extruded fish feed production, protein hydrolysis, process development and application of separation technology. I have a civil engineer degree (M.Sc.) in chemistry and industrial biotechnology and a PhD degree in physics and technology. Former research activities include industry and process related projects within raw material quality, separation and dewatering technology, feed technology, fermentation technology, fish oil refining and f
ood applications, and removal of persistent organic pollutants in fishmeal and fish oil. I have former industrial experience in development and formulation of specialty diets, food supplements, functional foods, feed ingredients and feeds.

Nutrition and feed technology

See publications in Cristin

My Projects

Mussel up

Blue mussel protein for aquafeeds

2023 - 2026

TOPP

Cod Milt – Oil and Protein Processing

2023 - 2026

Energy-efficient dewatering for production of high-quality fishmeal

2024 - 2026

HybridFoods

Novel hybrid foods targeting future sustainability and health challenges

2021 - 2025

HydroSens

First generation of animal derived hydrolysates meeting sensory conditions and consumer demand

2022 - 2024

SAFE

Bilateral cooperation between Croatia and Norway in the field of sustainable aquaculture and fisheries

2023 - 2024

Whitefish

Unlocking novel product possibilities and barriers for commercial utilization of whitefish residual raw materials onboard factory trawlers

2018 - 2023

Peptek

Peptide technology for the future’s protein production

2016 - 2022

My publications

Åge Oterhals has 54 publications at Nofima:

Utbyttetall og næringsstoffinnhold i hvitfiskmel og olje basert på restråstoff fra torsk, hyse og sei

2023
Nofima’s reports

Uttesting av naturlige antioksidanter i hvitfiskmel

2023
Nofima’s reports

Effects of Bioactive Peptides from Atlantic Salmon Processing By-Products on Oxyntopeptic and Enteroendocrine Cells of the Gastric Mucosa of European Seabass and Gilthead Seabream

Animals, 2023
Academic article

A diet containing cod backbone proteins attenuated the development of mesangial sclerosis and tubular dysfunction in male obese BTBR ob/ob mice

European Journal of Nutrition, 2023
Academic article

Sensory Properties and Chemical Composition of Fish Solubles Obtained from Upcycling of Fish Filleting Side Streams

Journal of Aquatic Food Product Technology, 2023
Academic article

Dietary fish intake increased the concentration of soluble ACE2 in rats. Can fish consumption reduce the risk of COVID-19 infection through interception of SARS-CoV-2 by soluble ACE2?

British Journal of Nutrition, 2023
Academic article

Growth, plasma biochemistry and immune-related gene expression of European sea bass (Dicentrarchus labrax) fed bioactive peptides from farmed salmon by-products

Aquaculture, 2023
Academic article

Utnyttelse av restråstoff fra makrell og sild, ekstraksjon av fosfolipider – Faglig sluttrapport

2022
Nofima’s reports

Optimalisering av prosessbetingelser for ekstraksjon av fosfolipider fra silderogn

2022
Nofima’s reports

Intake of residuals from Atlantic cod attenuated blood pressure increase but did not delay development of kidney damage in obese Zucker fa/fa rats

Food & Nutrition Research, 2022
Academic article

Phospholipid levels in mackerel and herring residuals and intermediate products from the fish meal and fish protein hydrolysate process

2021
Nofima’s reports

Reduction in flavor-intense components in fish protein hydrolysates by membrane filtration

Journal of Food Science, 2021
Academic article

Emulsion and Surface-Active Properties of Fish Solubles Based on Direct Extraction and after Hydrolysis of Atlantic Cod and Atlantic Salmon Backbones

Foods, 2021
Academic article

Effect of cod residual protein supplementation on markers of glucose regulation in lean adults: A randomized double-blind study

Nutrients, 2020
Academic article

Effects of intact and hydrolysed blue whiting proteins on blood pressure and markers of kidney function in obese Zucker fa/fa rats

European Journal of Nutrition, 2020
Academic article

Sensory Assessment of Fish and Chicken Protein Hydrolysates. Evaluation of NMR Metabolomics Profiling as a New Prediction Tool

Journal of Agricultural and Food Chemistry, 2020
Academic article

Bleaching and winterization of crude oil from mackerel residue

2019
Nofima’s reports

Cod protein powder lowered serum nonesterified fatty acids and increased total bile acid concentrations in healthy, lean, physically active adults: A randomized double-blind study

Food & Nutrition Research, 2019
Academic article

A novel approach to determine optimal protein texturization conditions – A critical moisture level with increased effect of temperature on viscosity reduction in the rubbery state

Journal of Food Engineering, 2019
Academic article

Impact of fish protein concentrate on apparent viscosity and physical properties of soy protein concentrate subjected to thermomechanical treatment

Journal of Food Engineering, 2019
Academic article

Optimising cell wall disruption by bead milling of microalgae biomass for release of nutrients for aquafeed and food applications (preliminary results)

2018
Academic chapter/article/Conference paper

Survey of technology for refining of mackerel oil

2018
Nofima’s reports

Cod Residual Protein Prevented Blood Pressure Increase in Zucker fa/fa Rats, Possibly by Inhibiting Activities of Angiotensin-Converting Enzyme and Renin

Nutrients, 2018
Academic article

Daily intake of protein from cod residual material lowers serum concentrations of nonesterified fatty acids in overweight healthy adults: A randomized double-blind pilot study

Marine Drugs, 2018
Academic article

Water-soluble fish protein intake led to lower serum and liver cholesterol concentrations in obese zucker fa/fa rats

Marine Drugs, 2018
Academic article

Effect of amino acid, pH and mineral salts on glass transition and ﬂow behaviour of soy protein concentrate

International Journal of Food Science & Technology, 2018
Academic article

High lipid microalgae (Schizochytrium sp.) inclusion as a sustainable source of n-3 long-chain PUFA in fish feed — Effects on the extrusion process and physical pellet quality

Animal Feed Science and Technology, 2018
Academic article

Enzyme pre-treatment of soybean meal: Effects on non-starch carbohydrates, protein, phytic acid, and saponin biotransformation and digestibility in mink (Neovison vison)

Animal Feed Science and Technology, 2017
Academic article

Valorization of Proteins from Co- and By-Products from the Fish and Meat Industry

Topics in current chemistry, 2017
Academic literature review

A systematic approach to the comparison of cost efficiency of endopeptidases for the hydrolysis of Atlantic salmon (Salmo salar) by-products

Food technology and biotechnology, 2016
Academic article

Influence of terrestrial lipid and protein sources and activated carbon-treated fish oil on levels of persistent organic pollutants and fatty acids in the flesh of Atlantic salmon

Aquaculture Research, 2015
Academic article

Influence of type of raw material on fishmeal physicochemical properties, the extrusion process, starch gelatinization and physical quality of fish feed

Aquaculture Nutrition, 2014
Academic article

Impact of extraction, refining and concentration stages on the stability of fish oil

2013
Academic chapter/article/Conference paper

Investigation of oxidative degradation and non‐enzymatic browning reactions in krill and fish oils

European Journal of Lipid Science and Technology, 2013
Academic article

Utvikling av høykvalitets pulverprodukt fra sildemelke. Sensorisk kvalitet på sildemelkepulver testet ved akselererte lagringsbetingelser – Fagrapport 2

2013
Nofima’s reports

Optimization of an oil leaching process to reduce the level of dioxins and dioxin-like PCBs in fishmeal

Journal of the Science of Food and Agriculture, 2013
Academic article

Impact of variability in fishmeal physicochemical properties on the extrusion process, starch gelatinization and pellet durability and hardness

Animal Feed Science and Technology, 2013
Academic article

Effects of Refining and Removal of Persistent Organic Pollutants by Short-Path Distillation on Nutritional Quality and Oxidative Stability of Fish Oil

Journal of Agricultural and Food Chemistry, 2010
Academic article

Modeling of a short-path distillation process to remove persistent organic pollutants in fish oil based on process parameters and quantitative structure properties relationships

Chemosphere, 2010
Academic article