Blar i Vitenskapelige publikasjoner (TN-IMN) på dokumenttype "Journal article"

Viser treff 41-60 av 69

    • On-shell parameter fixing in the quark-meson model 

      Adhikari, Prabal; Andersen, Jens Oluf; Kneschke, Patrick (Journal article; Peer reviewed, 2017-02)
      The quark-meson model is often used as an effective low-energy model for QCD to study the chiral transition at finite temperature T and baryon chemical potential μB. The parameters in the quark-meson model can be found by ...

    • Optimization of acid catalyzed transesterification of jatropha and rapeseed oil with 1-butanol 

      Bynes, Adrian N.; Eide, Ingvar; Jørgensen, Kåre Bredeli (Peer reviewed; Journal article, 2014-08)
      The acid catalyzed transesterification of rapeseed and jatropha oil with 1-butanol was studied by varying temperature, reaction time, butanol/triglyceride ratio and the amount of sulfuric acid. A full factorial design ...

    • Photochemical oxidative cyclisation of stilbenes and stilbenoids : the Mallory-reaction 

      Jørgensen, Kåre B. (Journal article; Peer reviewed, 2011-06-14)
      After Mallory described in 1964 the use of iodine as catalyst for the photochemical cyclisation of stilbenes, this reaction has proven its effectiveness in the synthesis of phenanthrenes, other PAHs and phenacenes with a ...

    • Photochemical synthesis of chrysenols 

      Jørgensen, Kåre B.; Joensen, Majbritt (Peer reviewed; Journal article, 2008-08)
      Chrysenols are formed together with other metabolites when chrysene is metabolized in living organisms. The principal metabolites are needed as pure compounds for reference materials and standards to study various aspects ...

    • PLATINUM SENSITIVE 2 LIKE impacts growth, root morphology, seed set, and stress responses 

      Lillo, Catherine; Kataya, Amr R. A.; Creighton, Maria Terese; Napitupulu, Toga P.; Sætre, Christine; Heidari, Behzad; Ruoff, Peter (Journal article; Peer reviewed, 2017-07)
      Eukaryotic protein phosphatase 4 (PP4) is a PP2A-type protein phosphatase that is part of a conserved complex with regulatory factors PSY2 and PP4R2. Various lines of Arabidopsis thaliana with mutated PP4 subunit genes ...

    • Primordial Gravitational Waves with LISA 

      Ricciardone, Angelo (Journal article; Peer reviewed, 2017)
      Primordial Gravitational Waves are the next target of modern cosmology. They represent a window on the early Universe and the only probe of the physics and microphysics of the inflationary period. When the production of ...

    • Pseudo-Riemannian VSI spaces 

      Hervik, Sigbjørn; Coley, Alan (Journal article; Peer reviewed, 2011)
      In this paper we consider pseudo-Riemannian spaces of arbitrary sig- nature for which all of their polynomial curvature invariants vanish (VSI spaces). We discuss an algebraic classification of pseudo-Riemannian spaces ...

    • Pseudo-Riemannian VSI spaces II 

      Hervik, Sigbjørn (Journal article; Peer reviewed, 2012)
      In this paper we consider pseudo-Riemannian spaces of arbitrary signature for which all of the polynomial curvature invariants vanish (VSI spaces). Using an algebraic classification of pseudo-Riemannian spaces in terms of ...

    • Regiospesific synthesis of dimethylphenanthrenes 

      Bøhme, Thomas Andre; Lorentzen, Marianne; Jørgensen, Kåre Bredeli (Peer reviewed; Journal article, 2017-05)
      The dimethylated phenanthrenes 2,3-dimethylphenanthrene (4a), 2,7-dimethylphenanthrene (4b), 2,6-dimethylphenanthrene (4c) and 1,7-dimethylphenanthrene (4d) have been prepared in gram-quantities by a short sequence of ...

    • Revision of the Bengalia spinifemorata species-group (Diptera, Calliphoridae) 

      Rognes, Knut (Journal article; Peer reviewed, 2011)
      The Afrotropical Bengalia spinifemorata species-group is revised and their male genitalia illustrated by means of digital colour photography. Six species are recognized and keyed, and their geographical distribution ...

    • Revision of the cluster flies of the Pollenia haeretica species-group (Diptera, Calliphoridae) 

      Rognes, Knut (Journal article; Peer reviewed, 2010-06-09)
      The Palaearctic Pollenia haeretica species-group is revised. Two species make up the group: Pollenia haeretica Séguy, 1928 (Algeria, Tunisia, Italy) and Pollenia ibalia Séguy, 1930 (Morocco). Pollenia rungsi Séguy, 1953 ...

    • Revision of the Oriental species of the Bengalia peuhi speciesgroup (Diptera, Calliphoridae) 

      Rognes, Knut (Peer reviewed; Book; Journal article, 2009-10-08)
      The Oriental species of the Bengalia peuhi species-group are revised and their male genitalia illustrated by means of digital colour photography. A key to males is presented, complete synonymies are given for all the species ...

    • Ricci nilsoliton black holes 

      Hervik, Sigbjørn (Journal article; Peer reviewed, 2008)
      We follow a constructive approach and find higher-dimensional black holes with Ricci nilsoliton horizons. The spacetimes are solutions to the Einstein equation with a negative cosmological constant and generalise therefore, ...

    • Semi-algebraic optimization of temperature compensation in a general switch-type negative feedback model of circadian clocks 

      Aase, Sven Ole; Ruoff, Peter (Journal article; Peer reviewed, 2008)
      Temperature compensation is an essential property of circadian oscillators which enables them to act as physiological clocks. We have analyzed the temperature compensating behavior of a generalized transcriptional–translational ...

    • Sensitivity analysis of a pathway with respect to fast and small temperature change 

      Zakhartsev, Maksim; Ruoff, Peter (Journal article; Peer reviewed, 2019)
      Temperature affects all enzymes simultaneously in a metabolic system. The enzyme concentration in a biochemical system can be considered as invariant under fast and small temperature change. Therefore, the total sensitivity ...

    • Simulations of "tunnelling of the 3rd kind" 

      Mou, Zonggang; Saffin, Paul M.; Tognarelli, Paul; Tranberg, Anders (Journal article; Peer reviewed, 2017-07)
      We consider the phenomenon of “tunnelling of the 3rd kind” [1], whereby a magnetic field may traverse a classically impenetrable barrier by pair creation of unimpeded quantum fermions. These propagate through the barrier ...

    • Simulations of Cold Electroweak Baryogenesis: finding the optimal quench time 

      Mou, Zonggang; Saffin, Paul M.; Tranberg, Anders (Journal article; Peer reviewed, 2017-07)
      We revisit the numerical computation of the baryon asymmetry from Cold Electroweak Baryogenesis given the physical Higgs mass. We investigate the dependence of the asymmetry on the speed at which electroweak symmetry ...

    • Simulations of Cold Electroweak Baryogenesis: hypercharge U(1) and the creation of helical magnetic fields 

      Mou, Zonggang; Saffin, Paul M.; Tranberg, Anders (Journal article; Peer reviewed, 2017-06)
      We perform numerical simulations of Cold Electroweak Baryogenesis, including for the first time in the Bosonic sector the full electroweak gauge group SU(2) × U(1) and CP-violation. We find that the maximum generated baryon ...

    • Statistical analysis of locally parameterized shapes 

      Taheri Shalmani, Mohsen; Schulz, Jörn (Peer reviewed; Journal article, 2022)
      In statistical shape analysis, the establishment of correspondence and defining shape representation are crucial steps for hypothesis testing to detect and explain local dissimilarities between two groups of objects. Most ...

    • Stem cell regulation: Implications when differentiated cells regulate symmetric stem cell division 

      Høyem, Marte Rørvik; Måløy, Frode; Jakobsen, Per; Brandsdal, Bjørn Olav (Journal article; Peer reviewed, 2015-05)
      We use a mathematical model to show that if symmetric stem cell division is regulated by differentiated cells, then changes in the population dynamics of the differentiated cells can lead to changes in the population ...