Blar i NOFIMA vitenarkiv på forfatter "Nygaard, Halvor"
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Inactivation of Clostridium sporogenes spores in fish by-products by a new processing method
Nygaard, Halvor; Lie, Kari Magnussen (Nofima rapportserie, Research report, 2011)The aim of the study was to determine the hygienization effect of a new processing method intended for category 2 material of fish origin. The method includes storage (≥ 24 hours) and heat treatment (≥ 85 ºC/≥ 25 minutes) ... -
Inactivation of IPN-virus in fish by-products by inorganic acid and base
Nygaard, Halvor; Myrmel, Mette (Nofima rapportserie, Research report, 2011)The aim of the project was to find a simple, inexpensive and safe method for the treatment of category 2 fish by-products without heat treatment. IPNV was chosen as indicator organism because it was considered to be the ... -
Inactivation of pathogenic microorganisms in fish by-products. Sub-project IPN-virus
Nygaard, Halvor; Myrmel, Mette (Nofima rapportserie, Research report, 2010)The aim of the present study was to determine the inactivation effect on IPNV resulting from heat treatment of fish by-products at different temperatures. Furthermore, the inactivation effect of a new alternative processing ... -
Mikrobiologi og produksjonshygiene i fiskemelindustrien
Nygaard, Halvor; Vander Roost, Jan Pieter (Nofima rapportserie, Research report, 2021)Rapporten gir en grunnleggende innføring i mikroorganismenes systematiske inndeling, reproduksjon og forhold til miljøfaktorer som temperatur, fuktighet og næringstilgang. De mest aktuelle patogene bakterier som kan forekomme ... -
Real Time PCR for Salmonella-analyse i fiskemel og andre fôrvarer
Nygaard, Halvor; Lie, Kari Magnussen (Research report, 2003)Polymerase Chain Reaction (PCR) er en av de viktigste teknikker innen moderne molekylærbiologi. Ved bruk av PCR i mikrobiologisk analyse, amplifiseres (mangfoldiggjøres) DNA-segmenter som er unike for den søkte organisme. ... -
Standard norsk fiskemel- og fiskeoljeprosess.Krav til varmebehandling
Nygaard, Halvor (Nofima rapportserie, Research report, 2010)Foreliggende rapport er en konsolidert versjon av tidligere Nofima rapport K-367, hvor nye kinetikkdata for termisk inaktivering av IPNV har blitt inkludert. Rapporten foreligger også i engelsk utgave (Nofima Report no. ... -
Standard Norwegian fishmeal- and fishoil process.Heat treatment requirements
Nygaard, Halvor (Nofima rapportserie, Research report, 2010)The present report is a consolidated version of former Nofima Report K-371, incorporating new kinetic data on thermal inactivation of IPNV (Nygaard and Myrmel, 2010). Report K-371 has been withdrawn. The project was initiated ... -
Technical feed quality influences health, digestion patterns, body mineralization and bone development in farming of the stomachless cleaner fish ballan wrasse (Labrus bergylta)
Kousoulaki, Katerina; Grøtan, Espen; Kortner, Trond M.; Berge, Gerd Marit; Haustveit, Gunhild; Krogdahl, Åshild; Nygaard, Halvor; Sæle, Øystein; Chikwati, Elvis Mashingaidze; Lein, Ingrid (Journal article; Peer reviewed, 2021)Farmed ballan wrasse (Labrus bergylta) is an efficient cleaner fish used for non-medicinal delicing of Atlantic salmon in sea cages replacing to an increasing degree wild wrasse due to considerations for biodiversity and ... -
Technical feed quality influences health, digestion patterns, body mineralization and bone development in farming of the stomachless cleaner fish ballan wrasse (Labrus bergylta)
Kousoulaki, Katerina; Grøtan, Espen; Kortner, Trond M.; Berge, Gerd Marit; Haustveit, Gunhild; Krogdahl, Åshild; Nygaard, Halvor; Sæle, Øystein; Chikwati, Elvis Mashingaidze; Lein, Ingrid (Peer reviewed; Journal article, 2021)Farmed ballan wrasse (Labrus bergylta) is an efficient cleaner fish used for non-medicinal delicing of Atlantic salmon in sea cages replacing to an increasing degree wild wrasse due to considerations for biodiversity and ... -
Validering av hurtigmetode for kvantifisering av gjær og mugg - Petrifilm Rapid Yeast and Mold (RYM) Count Plate
Nygaard, Halvor (Nofima rapportserie, Research report, 2017)Metodens riktighet og presisjon ble vurdert som tilfredsstillende, basert på ekstern kollaborativ validering og intern verifisering av riktighet og presisjon. Riktighet Analyser av referansemateriale med ny metode (RYM), ... -
Validering av PCR-metode for påvisning av Salmonella og Listeria monocytogenes
Nygaard, Halvor; Lie, Kari Magnussen (Nofima rapportserie, Research report, 2019)Laboratoriet har gjennomført intern validering av PCR-metoder for påvisning av Salmonella og Listeria monocytogenes. Metodene benytter instrumentet Roche LightCycler96 Real Time PCR Cycler og kits for DNA preparering og ... -
Verification of a new processing method for treatment of category 2 material of fish origin – Full scale trials (Sec. ed. – minor corrections in page 3, 11 and Appendix I)
Nygaard, Halvor (Research report, 2013)The Norwegian Seafood Federation (FHL) has applied for approval of a new alternative method for processing of category 2 animal by-products (ABP) of fish origin. The processing method is characterized by fish raw material ...