Browsing NTNU Open by Author "Netzer, Roman"
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Biodegradation of Dispersed Oil in natural Seawaters from Western Greenland and a Norwegian fjord
Brakstad, Odd Gunnar; Davies, Emlyn John; Ribicic, Deni; Winkler, Anika; Brönner, Ute; Netzer, Roman (Journal article; Peer reviewed, 2018)With increasing oil exploration, production and transportation in the Arctic, predictions of the fate of spilled oil become important, including oil compound biodegradation. The use of chemical dispersants may result in ... -
Comparison of microbial community dynamics induced by distinct crude oil dispersions reveals compositional differences
Ribicic, Deni; Netzer, Roman; Winkler, Anika; Brakstad, Odd Gunnar (Journal article; Peer reviewed, 2018)To understand the impact of oil contamination on marine microbial communities, numerous studies have been conducted following microbial dynamics after oil spills and concerning the effects of different environmental ... -
Dispersibility and biotransformation of oils with different properties in seawater
Brakstad, Odd Gunnar; Farooq, Umer; Ribicic, Deni; Netzer, Roman (Journal article; Peer reviewed, 2018)Dispersants are used to remove oils slicks from sea surfaces and to generate small oil-droplet dispersions, which may result in enhanced biodegradation of the oil. In this study, dispersibility and biodegradation of ... -
Effect of different live feed organisms on microbiota, growth and survival during start-feeding of ballan wrasse (Labrus bergylta)
Rosvoll, Ann Isabel C. (Master thesis, 2022)Rensefisk har en sentral rolle i lakseindustrien som en biologisk behandling mot lakselus (Lepeophtheirus salmonis). Parasittene har en negativ påvirkning på velferden til fisken, i tillegg til lakseprodusentenes økonomiske ... -
Effects of H2S and mitigation measures on microbial communities in Atlantic salmon (Salmo salar) smolt RAS
Kapasakis, Stamatios (Master thesis, 2024)Akvakultur er den raskest voksende matsektoren globalt og har betydelig potensial som en bærekraftig matkilde for å støtte den stadig økende globale befolkningen. Imidlertid presenterer den raske utvidelsen av denne sektoren ... -
L-lysine production by Bacillus methanolicus: Genome-based mutational analysis and L-lysine secretion engineering
Nærdal, Ingemar; Netzer, Roman; Irla, Marta; Krog, Anne; Heggset, Tonje Marita Bjerkan; Wendisch, Volker F.; Brautaset, Trygve (Journal article; Peer reviewed, 2017)Bacillus methanolicus is a methylotrophic bacterium with an increasing interest in academic research and for biotechnological applications. This bacterium was previously applied for methanol-based production of l-glutamate, ... -
Long-term microbial community structures and dynamics in a commercial RAS during seven production batches of Atlantic salmon fry (Salmo salar)
Dahle, Stine Veronica Wiborg; Gaarden, Sunniva Ingebrigtsen; Buhaug, Julia Fossberg; Netzer, Roman; Attramadal, Kari; Busche, Tobias; Aas, Marianne; Ribicic, Deni; Bakke, Ingrid (Peer reviewed; Journal article, 2023)The microbiota of recirculating aquaculture systems (RAS) is of major importance for optimal fish health. However, the microbial communities in commercial RAS are highly complex and more knowledge is needed to potentially ... -
Mapping bacterial community structures in skin and gill mucus of Atlantic salmon (Salmo salar) smolt from four commercial RAS facilities
Sandberg, Renate (Master thesis, 2021)Resirkulerende akvakultursystemer (RAS) har økt i popularitet for oppdrett av atlantisk laks (Salmo salar). I RAS blir fisken kontinuerlig utsatt for mikrober som lever i det resirkulerende vannet, der enkelte også har ... -
Microbial communities in seawater from an Arctic and a temperate Norwegian fjord and their potentials for biodegradation of chemically dispersed oil at low seawater temperatures
Ribicic, Deni; Netzer, Roman; Winkler, Anika; Brakstad, Odd Gunnar (Journal article; Peer reviewed, 2018)Biodegradation of chemically dispersed oil at low temperature (0–2 °C) was compared in natural seawater from Arctic (Svalbard) and a temperate (Norway) fjords. The oil was premixed with a dispersant (Corexit 9500) and ... -
Microbial community and metagenome dynamics during biodegradation of dispersed oil reveals potential key-players in cold Norwegian seawater
Ribicic, Deni; Netzer, Roman; Hazen, Terry C.; Techtmann, Stephen M.; Drabløs, Finn; Brakstad, Odd Gunnar (Journal article; Peer reviewed, 2018)Oil biodegradation as a weathering process has been extensively investigated over the years, especially after the Deepwater Horizon blowout. In this study, we performed microcosm experiments at 5 °C with chemically dispersed ... -
Microbial community dynamics in water and biofilm of recirculating aquaculture systems (RAS)
Dahle, Stine Veronica Wiborg (Doctoral theses at NTNU;2022:383, Doctoral thesis, 2022)The microbial communities in recirculating aquaculture systems (RAS) are essential for optimal physicochemical water quality and fish health. Despite progress, there is still limited knowledge on microbial community dynamics ... -
Oil type and temperature dependent biodegradation dynamics. Combining chemical and microbial community data through multivariate analysis
Ribicic, Deni; McFarlin, Kelly Marie; Netzer, Roman; Brakstad, Odd Gunnar; Winkler, Anika; Throne-Holst, Mimmi; Størseth, Trond Røvik (Journal article; Peer reviewed, 2018)Background This study investigates a comparative multivariate approach for studying the biodegradation of chemically dispersed oil. The rationale for this approach lies in the inherent complexity of the data and challenges ...