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Røyne, Anja
(2023).
Gruvedrift på havbunnen må vente.
Klassekampen.
ISSN 0805-3839.
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Campana Perilla, Ana Lucia; Joudeh, Nadeem; Merroun, Mohamed; Gomez-Bolivar, Jamie; Røyne, Anja & Linke, Dirk
[Show all 7 contributors for this article]
(2022).
Biosynthesis and characterization of Palladium-Based Nanoparticles using Escherichia coli.
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Dziadkowiec, Joanna; Javadi, Shaghayegh; Ban, Matea; Jamtveit, Bjørn & Røyne, Anja
(2022).
Ion-dependent adhesion between calcite surfaces.
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Røyne, Anja
(2021).
Klimafiksing.
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Røyne, Anja
(2021).
Bokprat: Varm klode, kaldt hode.
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Røyne, Anja & Eriksen, Thomas Hylland
(2021).
Varm klode, kaldt hode.
[Internet].
Stavanger sakprosafestival.
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Røyne, Anja
(2021).
Varm klode, kaldt hode.
[Internet].
Podcastopptak for Viken fylkesbibliotek.
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Dziadkowiec, Joanna; Ban, Matea; Javadi, Shaghayegh; Jamtveit, Bjørn & Røyne, Anja
(2021).
Ion-specific adhesion between brittle calcite surfaces.
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Dziadkowiec, Joanna; Zareeipolgardani, Bahareh; Cheng, Hsiu-Wei; Dysthe, Dag Kristian; Røyne, Anja & Valtiner, Markus
(2021).
Forces between reactive surfaces.
Show summary
Adhesive and repulsive, nm-range surface forces acting between mineral grains control colloidal stability and mineral aggregation but less is known about how these forces are affected by surface reactivity and to what extent these grain-scale forces can influence various deformation processes in rocks. In this experimental work, we explore and quantify the surface forces acting between dynamic mineral surfaces that undergo recrystallization or are chemically reactive in contact with water or aqueous salt solutions. Our experimental setup consists of the surface forces apparatus (SFA) coupled with the multiple beam interferometry (MBI). This setup can excellently reproduce a typical grain contact geometry with nanometer-thin water films confined between contacting mineral grains over relatively large, micron-sized contact areas. Owing to the use of MBI, both surface growth or dissolution processes can be monitored during force measurements in real-time. As such, SFA can provide information about the links between surface reactivity and adhesive or repulsive surface forces. Using the examples of force measurements between recrystallizing or chemically reactive mineral surfaces such as carbonates, hydroxides, and silicates, we comment on the relationship between the measured surface forces and surface reactivity. We link our findings with the observed changes in mineral phases, surface topographies, or surface roughness. We also comment on how the micron-scale confinement in the SFA affects the growth and dissolution processes in contrast to less confined regions. The magnitude of the forces associated with dynamic mineral surfaces and the potential significance of these forces to macroscopic deformation processes and cohesion in rocks are discussed.
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Dziadkowiec, Joanna & Røyne, Anja
(2021).
Do soluble organic acids bind to basal mica surfaces?
Show summary
Soluble organic acids are constantly supplied to soils as a result of the oxidative decomposition of organic matter by the plant roots and microorganisms. These carboxylic group-bearing organic molecules can interact with soil clay minerals and affect the formation and stability of organomineral aggregates. While it has been suggested that –COOH laden organics can strongly bind to broken clay
edges, less is known about how such soluble acids interact with negatively charged basal clay surfaces.
This work presents a Surface Forces Apparatus (SFA) study of interactions between two mica surfaces in dicarboxylic acid molecules with 2 to 7 carbon atoms. SFA allows measuring nanoscale surface forces acting between macroscopic surfaces as a function of surface separation. Since, unlike as in atomic force microscopy, the absolute surface separation in the SFA is known, it is possible simultaneously probe the adsorption of dicarboxylic acids onto mica.
The results show that significant amounts of dicarboxylic acids can adsorb on mica surfaces, but only in the presence of Ca2+ ions. Ca2+ acts as cationic bridges between the negatively charged mica surface and deprotonated –COO- functionalities. In addition, the multilayer binding of larger dicarboxylic acids (C5-C7) via an assembly of hydrophobic chains is resolved. Na+ does not promote
any substantial dicarboxylic acid adsorption and induce strong repulsion between mica surfaces.
In summary, although these face-specific SFA measurements show that dicarboxylic acids adsorb onto mica basal surfaces only by weak forces including electrostatic, hydrophobic, and likely hydrogen bonding, they demonstrate that even such weak outer-sphere adsorption can affect adhesion between clay surfaces and play a role in the organomineral aggregate formation.
Acknowledgments:
This study has been financed by the Research Council of Norway (grant No 286733) and the European Union Horizon 2020 (grant No 642976-Nano-Heal).
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Einevoll, Gaute; Samset, Bjørn Hallvard; Sverdrup-Thygeson, Anne; Svihus, Birger; Østby, Hilde & Røyne, Anja
[Show all 7 contributors for this article]
(2020).
Om å gi alle jordas mennesker gode liv uten å ødelegge miljøet.
[Internet].
Podcast: Vett og vitenskap med Gaute Einevoll.
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Einevoll, Gaute & Røyne, Anja
(2020).
Om løsninger på klimakrisen.
[Internet].
Podcast: Vett og vitenskap med Gaute Einevoll.
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Campaña Perilla, Ana Lucia; Joudeh, Nadeem; Høyer, Henrik; Røyne, Anja; Linke, Dirk & Mikheenko, Pavlo
(2020).
Probing van der Waals and magnetic forces in bacteria with magnetic nanoparticles.
Show summary
Bioinspired metal-based nanoparticles have potential uses in many applications, but before a possible commercial exploitation, it is important to clarify the pathways of their production and deposition inside the organisms, for example in bacteria. The technique of magnetic force microscopy (MFM) could be used to evaluate the nanoparticles magnetic properties, in addition to allowing tracing their location inside or outside of bacteria, which could help to understand pathways of their biosynthesis. In this work, using MFM and analyzing the interaction of magnetic tip with nanoparticles and bacteria imbedded in resin at different heights above the surface, and comparing gradients of forces recorded by magnetic and non-magnetic tips, a condition was found, which allows to measure pure magnetic response of Pd-Fe nanoparticles. For these nanoparticles, the interplay between magnetic and van der Waals forces is described at small distances to the surface. Experimental data are compared with simulations, based on the calculation of the distribution of magnetic field around a nanoparticle, which defines magnetic force acting on the MFM tip.
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Claxton, James; Joudeh, Nadeem; Røyne, Anja; Linke, Dirk & Mikheenko, Pavlo
(2020).
Sequential magnetic mapping of bacteria loaded with Pd-Fe nanoparticles .
Show summary
Magnetic nanoparticles are of widespread use in nanotechnology. One of the most unusual are magnetic palladium nanoparticles that combine magnetism with high catalytic activity. These nanoparticles could be obtained biologically by exposing bacteria to a palladium salt. Due to their small size and weak magnetism, however, it is challenging to measure their magnetic properties. One of the solutions to enhance their magnetism is to incorporate a small amount of iron atoms into them. After this procedure, the nanoparticles together with bacteria can be embedded in resin and characterized by the technique of magnetic force microscopy. This technique allows imaging cross-sections of the bacteria with nanoparticles, but cannot give information from the depth of the sample. Here we report on an approach partially solving this problem. Its novelty lies in measurements of consecutive thin slices of resin, which allows mapping cross-sections of individual bacteria and different parts of the material surrounding the same bacterium. An interesting observed feature is the formation of magnetic chains of nanoparticles outside of the bacteria.
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Røyne, Anja
(2020).
Ekko. Løsninger på klimakrisen.
[Radio].
NRK P2.
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Røyne, Anja
(2020).
Menneskets grunnstoffer.
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Røyne, Anja; Samset, Bjørn Hallvard; Sundal, Anja; Storelvmo, Trude & Joner, Erik
(2020).
Boklansering: Varm klode, kaldt hode. Løsninger på klimakrisen.
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Røyne, Anja
(2020).
Menneskets grunnstoffer.
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Røyne, Anja
(2020).
Ekko: Abels tårn.
[Radio].
NRK P2.
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Røyne, Anja
(2020).
Menneskets grunnstoffer.
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Røyne, Anja
(2020).
Menneskets grunnstoffer.
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Røyne, Anja
(2020).
Ekko: Abels Tårn.
[Radio].
NRK P2.
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Dziadkowiec, Joanna; Cheng, Hsiu-Wei; Røyne, Anja & Valtiner, Markus
(2020).
Interactions between reactive mineral surfaces studied with the surface forces apparatus.
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Røyne, Anja
(2020).
Menneskets og økosystemets grunnstoffer i et evig kretsløp?
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Røyne, Anja
(2020).
Menneskets grunnstoffer.
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Røyne, Anja
(2020).
Blir det tomt? Ressurser, forbruk og fremtiden.
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Mikheenko, Pavlo; Mikheenko, Iryna; Joudeh, Nadeem; Claxton, J. B.; Røyne, Anja & Linke, Dirk
(2019).
Imaging magnetism of biologically produced palladium nanoparticles
.
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Røyne, Anja
(2019).
Klima for dummies.
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Røyne, Anja
(2019).
Jorda før livet.
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Røyne, Anja
(2019).
Menneskets grunnstoffer.
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Røyne, Anja
(2019).
Menneskets grunnstoffer.
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Røyne, Anja
(2019).
Prosalong: Menneskets grunnstoffer.
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Røyne, Anja
(2019).
Ekko: Abels Tårn.
[Radio].
NRK P2.
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Røyne, Anja
(2019).
Menneskets grunnstoffer.
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Røyne, Anja
(2019).
Hva alt er laget av og hvor det kommer fra.
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Røyne, Anja
(2019).
Menneskets grunnstoffer.
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Røyne, Anja
(2019).
Menneskets grunnstoffer.
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Røyne, Anja
(2019).
Hva er egentlig verden bygd opp av?
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Røyne, Anja
(2019).
Grunnstoffer: Verdens framtid og deg.
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Røyne, Anja
(2019).
Menneskets grunnstoffer.
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Røyne, Anja
(2019).
Menneskets grunnstoffer.
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Røyne, Anja
(2019).
Menneskets grunnstoffer.
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Røyne, Anja
(2019).
Mennesket grunnstoffer.
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Røyne, Anja
(2019).
Mennesket grunnstoffer.
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Vollsnes, Ane Victoria; Røyne, Anja; Leira, Torkjell & Torgersen, Eivind
(2019).
Regnskogene er ikke jordas lunger – så hvor kommer oksygenet vi puster fra?
[Journal].
titan.uio.no.
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Razbani, Mohammad Amin; Zehner, Jennifer Simone; Jettestuen, Espen; Røyne, Anja; Sikorski, Pawel & Malthe-Sørenssen, Anders
(2019).
A pore-scale model of microbially induced calcium carbonate precipitation.
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Zehner, Jennifer Simone; Karlsen, Emil; Razbani, Mohammad Amin; Jettestuen, Espen; Malthe-Sørensen, Anders & Wentzel, Alexander
[Show all 9 contributors for this article]
(2019).
The quest for bio-concrete: crossing disciplinary boundaries
and wrangling bacteria to enable cleaner construction.
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Joudeh, Nadeem; Røyne, Anja; Mikheenko, Pavlo & Linke, Dirk
(2019).
Bio-Engineered Palladium Nanoparticles (BEDPAN).
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Dziadkowiec, Joanna; Javadi, Shaghayegh & Røyne, Anja
(2019).
Contacts between reactive surfaces.
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Dziadkowiec, Joanna; Zareeipolgardani, Bahareh; Bratvold, Jon E.; Nilsen, Ola; Dysthe, Dag Kristian & Røyne, Anja
(2019).
Long-range repulsive forces between reactive calcite surfaces are generated due to nucleation in a confined solution.
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Røyne, Anja
(2018).
Bærekraftig betong laget av bakterier.
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Dziadkowiec, Joanna; Javadi, Shaghayegh; Bratvold, Jon E.; Nilsen, Ola & Røyne, Anja
(2018).
Nucleation in solution confined between
reactive surfaces can generate long-range
repulsive forces.
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Dziadkowiec, Joanna; Javadi, Shaghayegh; Bratvold, Jon E.; Nilsen, Ola & Røyne, Anja
(2018).
Adhesive and repulsive forces between calcite surfaces.
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Jemterud, Torkild; Røyne, Anja; Madsen, Steinar & Bjorå, Charlotte Sletten
(2018).
Abels tårn, NRK P2: "Baby-lukt, vannkraft og hvorfor det å være på bærtur er negativt".
[Radio].
NRK P2.
Show summary
Vi starter sesongen risikabelt. Rett før sending slapp botaniker Charlotte Sletten Bjorå en kvast med noen blader i tårngeneralens kaffe. Så, etter noen slurker, opplyste hun om at planten var merket som GIFT i botanisk hage. DERETTER spurte hun lege Steinar Madsen om han viste hvilke giftstoffer det var i planta.
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Jemterud, Torkild; Swang, Ole; Delsett, Lene Liebe & Røyne, Anja
(2018).
Abels Tårn, NRK P2: "Alfa-hanners kurtise, trampolinehopping i solskinn, kefir-fyll - og forsøk på å løse et klokkemysterium!".
[Radio].
NRK P2.
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Røyne, Anja; Phua, Yi Jing; Eikjeland, Ina Grosås; Wentzel, Alexander; Le, Simone Balzer & Josefsen, Kjell Domaas
[Show all 14 contributors for this article]
(2018).
BioZEment 2.0: Towards a low CO2 emission building material employing bacterial metabolism.
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Javadi, Shaghayegh; Dziadkowiec, Joanna; Røyne, Anja; Bratvold, Jon E.; Nilsen, Ola & Hiorth, Aksel
(2018).
Synthetic CaCO3 surfaces in aqueous solutions – AFM and Surface Force Apparatus (SFA) measurements
.
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Jemterud, Torkild; Røyne, Anja; Gadmar, Tone Charlotte & Brodal, Per
(2018).
Abels tårn, NRK Radio: "Hva skjer når moderne kropper, fylt med silikon og gudene vet hva, en dag skal begraves?".
[Radio].
Ekko, NRK P2.
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