Hjem
John Georg Selands bilde

John Georg Seland

Førsteamanuensis
  • E-postJohn.Seland@uib.no
  • Telefon+47 55 58 82 20
  • Besøksadresse
    Realfagbygget, Allégt. 41
    Rom 
    3051-D
  • Postadresse
    Postboks 7803
    5020 BERGEN

Min forskning er fokusert på karakterisering av molekylers dynamikk og organisering i ulike typer materialer ved bruk av Kjerne Magnetisk Resonans (NMR) spektroskopi. De NMR-teknikkene som benyttes er basert på hvordan dynamiske prosesser som relaksasjon og diffusjon påvirker NMR-signalet, og hva dette kan fortelle oss om vekselvirkninger mellom molekylene. Jeg jobber spesielt med karakterisering av væskefylte porøse systemer og ulike former for myke materialer. 

 

 

 

 

Jeg underviser kursene:

KJEM251 NMR-spektroskopi I

KJEM202 Miljøkjemi (sammen med Olav Kvalheim)

Masteroppgaver blir gitt innen følgende forskningsområder:

Studier av molekyler i komplekse blandinger ved bruk av diffusjonsvektet NMR-spektroskopi: Molekyler i en blanding kan ha ulik diffusjonshastighet på grunn av ulike størrelser på molekylene. Dette kan benyttes til å separere NMR-spektrene til de ulike komponentene i en blanding, noe som gir en enklere og mer sikker tolkning av resultatene. Teknikken kan også benyttes til å studere vekselvirkninger mellom molekyler i en blanding. Vi anvender teknikken på matvareprodukter og petroleumsprodukter, men teknikken kan også anvendes på andre typer av komplekse blandinger. Forskningen utføres i samarbeid med Nils Åge Frøystein. 

Karakterisering av væskefylte borekjerner ved bruk av NMR: Vi fokuserer på å optimalisere og utvikle teknikker for karakterisering av parametre som overflatefukting og pore-konnektivitet, for anvendelse innen petroleumkjemi. Dette er egenskaper som kan kartlegges ved bruk av spesielle NMR-teknikker som baserer seg på endrede relaksasjon- og diffusjonsegenskaper til molekylene når de befinner seg i kontakt med en overflate. Prosjektene utføres delvis i samarbeid med Centre for Integrated petroleum Research (CIPR) ved UiB. 

Kartlegging av væsketransport i heterogene systemer ved bruk av NMR: En rekke heterogene systemer, fra kompositt materialer til biologisk vev, har det til felles at de kan betraktes å inneholde barrierer (membraner) som hindrer transport av væsker (molekylær diffusjon og strømning). I dette prosjektet vil vi spesielt fokusere på bestemmelse av transport av vann i biologiske heterogene systemer ved bruk av NMR, men de underliggende mekanismene for væskedynamikk kan også benyttes til å kartlegge transportprosesser innen studier av for eksempel mikroemulsjoner, heterogent katalysatormateriale, samt en rekke andre porøse materialer.

 

Vitenskapelig artikkel
  • Vis forfatter(e) 2020. Effect of Mineral Composition on Transverse Relaxation Time Distributions and MR Imaging of Tight Rocks from Offshore Ireland. Minerals. 232.
  • Vis forfatter(e) 2019. Surfactant Prefloods During Carbon Dioxide Foam Injection for Integrated Enhanced Oil Recovery in Fractured Oil-Wet Carbonates. SPE Journal. 1139-1153.
  • Vis forfatter(e) 2019. Investigating pore geometry in heterogeneous porous samples using spatially resolved G0-Xapp and G0-v correlations. Journal of magnetic resonance (San Diego, Calif. 1997 : Print). 40-48.
  • Vis forfatter(e) 2019. Investigating mobility of crude oil adsorbates on mineral surfaces by NMR. Magnetic Resonance Imaging. 86-89.
  • Vis forfatter(e) 2019. Characterising oil and water in porous media using correlations between internal magnetic gradient and transverse relaxation time. Journal of magnetic resonance (San Diego, Calif. 1997 : Print).
  • Vis forfatter(e) 2019. A fluid specific dimension of confinement as a measure of wettability in porous media. Journal of magnetic resonance (San Diego, Calif. 1997 : Print).
  • Vis forfatter(e) 2018. Investigating structure-dependent diffusion in hydrogels using spatially resolved NMR spectroscopy. Journal of Colloid and Interface Science. 671-677.
  • Vis forfatter(e) 2018. Investigating mobility of crude oil adsorbates on mineral surfaces by NMR. Magnetic Resonance Imaging.
  • Vis forfatter(e) 2018. Determining the scaling of gel mesh size with changing crosslinker concentration using dynamic swelling, rheometry, and PGSE NMR spectroscopy. Journal of Applied Polymer Science. 1-10.
  • Vis forfatter(e) 2018. Characterization of pore geometry using correlations between magnetic field and internal gradient. Microporous and Mesoporous Materials. 31-34.
  • Vis forfatter(e) 2017. Crude Oil Adsorbates on Calcite and Quartz Surfaces Investigated by NMR Spectroscopy. Journal of Physical Chemistry C. 20892-20899.
  • Vis forfatter(e) 2017. Analysis of wild and farmed salmon using 13C solid-state NMR and MRI directly on fillet tissue. Analytical Methods. 1290-1296.
  • Vis forfatter(e) 2016. Re-entrant transition of aluminum-crosslinked partially hydrolyzed polyacrylamide in a high salinity solvent by rheology and NMR. Journal of Applied Polymer Science.
  • Vis forfatter(e) 2016. A multi-dimensional experiment for characterization of pore structure heterogeneity using NMR. Journal of magnetic resonance (San Diego, Calif. 1997 : Print). 19-32.
  • Vis forfatter(e) 2015. Characterising oil and water in porous media using decay due to diffusion in the internal field. Journal of magnetic resonance (San Diego, Calif. 1997 : Print). 1-9.
  • Vis forfatter(e) 2014. Nanoparticles for enhanced oil recovery: influence of pH on aluminum-cross-linked partially hydrolyzed polyacrylamide-investigation by rheology and NMR. Energy & Fuels. 2343-2351.
  • Vis forfatter(e) 2014. Nanoparticles for enhanced oil recovery: Phase transition of aluminum-cross-linked partially hydrolyzed polyacrylamide under low-salinity conditions by rheology and nuclear magnetic resonance. Energy & Fuels. 2948-2958.
  • Vis forfatter(e) 2013. Screening of the relaxivity of gadolinium-loaded periodic mesoporous silica functionalized by means of soft metalorganic silylamide grafting. European Journal of Inorganic Chemistry (EurJIC). 5969-5979.
  • Vis forfatter(e) 2013. Relaxometric properties of gadolinium-grafted mesoporous SBA-15 silica materials with varying pore size. Microporous and Mesoporous Materials. 125-133.
  • Vis forfatter(e) 2013. Investigating pore to pore exchange in systems saturated with water and oil. Diffusion Fundamentals. 1-5.
  • Vis forfatter(e) 2011. A comparison of retrospectively self-gated magnetic resonance imaging and high-frequency echocardiography for characterization of left ventricular function in mice. Laboratory Animals. Journal of the Laboratory Animal Science Association. 31-37.
  • Vis forfatter(e) 2007. Dynamic water changes in excised rat myocardium assessed by continuous distribution of T-1 and T-2. Magnetic Resonance in Medicine. 442-447.
  • Vis forfatter(e) 2007. Analyzing equilibrium water exchange between myocardial tissue compartments using dynamical two-dimensional correlation experiments combined with manganese-enhanced relaxography. Magnetic Resonance in Medicine. 674-686.
  • Vis forfatter(e) 2005. Determination of water compartments in rat myocardium using combined D-T-1 and T-1-T-2 experiments. Magnetic Resonance Imaging.
  • Vis forfatter(e) 2004. NMR propagator measurements on flow through a random pack of porous glass beads and how they are effected by dispersion, relaxation and internal field inhomogeneities. Physical Review E. Statistical, Nonlinear, and Soft Matter Physics.
  • Vis forfatter(e) 2004. Exploring the separate NMR responses from crude oil and water in rock cores. Applied Magnetic Resonance. 417-425.
  • Vis forfatter(e) 2004. Correlations between diffusion, internal magnetic field gradients and transverse relaxation in porous systems containing oil and water. Physical Review E. Statistical, Nonlinear, and Soft Matter Physics.
  • Vis forfatter(e) 2003. Characterization of Heterogeneous Systems Using Combinations of PFG and CPMG NMR Measurements. Applied Magnetic Resonance. 1-5.
  • Vis forfatter(e) 2000. Improved Convection Compensating Pulsed Field Gradient Spin-Echo and Stimulated-Echo Methods. Journal of magnetic resonance (San Diego, Calif. 1997 : Print). 323-325.
  • Vis forfatter(e) 2000. Diffusion measurements at long observation times in the presence of spatially variable internal magnetic field gradients. Journal of magnetic resonance (San Diego, Calif. 1997 : Print). 14-19.
Vitenskapelig foredrag
  • Vis forfatter(e) 2019. Investigating liquid displacement in porous media using spatially resolved NMR spectroscopy.
  • Vis forfatter(e) 2018. Surfactant Pre-floods during CO2 Foam for Integrated Enhanced Oil Recovery in Fractured Oil-Wet Carbonates, SPE .
  • Vis forfatter(e) 2018. Investigating mobility of crude oil adsorbates on mineral surfaces by NMR.
  • Vis forfatter(e) 2017. An NMR-investigation of Crude Oil Adsorbates on Calcite and Quartz Surfaces.
  • Vis forfatter(e) 2016. Multi-dimensional NMR experiments for characterization of pore structure heterogeneity and liquid saturations.
  • Vis forfatter(e) 2014. CORRELATIONS BETWEEN INHOMOGENEOUS MAGNETIC FIELDS, INTERNAL GRADIENTS, AND TRANSVERSE RELAXATION, AS A PROBE FOR PORE GEOMETRY AND HETEROGENEITY.
  • Vis forfatter(e) 2008. Determining cellular microstructure of isolated rat hearts using correlated time-dependent diffusion and T2 relaxation measurements.
  • Vis forfatter(e) 2008. Determining cellular microstructure of isolated rat hearts using correlated time dependent diffusion and T2 relaxation measurements.
  • Vis forfatter(e) 2008. A relaxographic analysis of multi-compartmental water exchange in isolated perfused rat hearts.
  • Vis forfatter(e) 2007. In vivo MRI of Small Animals: T1-mapping of Rat Myocardium.
  • Vis forfatter(e) 2006. Studying water exchange in biological tissue using two dimensional relaxation and diffusion measurements.
  • Vis forfatter(e) 2006. Changes in T1 and T2 Components in Global Ischemic Rat Heart Tissue.
  • Vis forfatter(e) 2005. Differentiating between Intracellular and Extracellular Relaxivities in Rat Myocardium Using MEMRI.
  • Vis forfatter(e) 2004. NMR-propagator measurements in porous media in the presence of surface relaxation and internal fields.
  • Vis forfatter(e) 2004. Determination of water compartments in rat myocardium using combined D-T1 and T1-T2 experiments.
  • Vis forfatter(e) 2004. Correlations between internal gradients and transverse relaxation in porous systems containing oil and water.
  • Vis forfatter(e) 2004. Correlations Between Transverse Relaxation and Internal Gradients in Porous Systems Containing Oil and Water .
  • Vis forfatter(e) 2004. Characterization of Heterogeneous Systems Using Combinations of PFG and CPMG NMR Measurements.
  • Vis forfatter(e) 2004. An Analysis of Water Compartments in Excised Rat Myocardium.
  • Vis forfatter(e) 2003. Exploring the Separate NMR Responses from Crude Oil and Water Simultaneously Present in Rock Cores.
  • Vis forfatter(e) 2003. Diffusion and T2-Distributions of water simultaneously present in porous rock.
  • Vis forfatter(e) 2003. Correlations Between Transverse Relaxation and Internal Gradients in Porous Systems Containing Oil and Water.
  • Vis forfatter(e) 2002. Utplassering av en virtuell kjernemagnetisk resonans fasilitet, VNMRF.
  • Vis forfatter(e) 2002. Kombinerte Diffusjon- og relaksasjonsmålinger for karakterisering av heterogene systemer.
  • Vis forfatter(e) 2000. Diffusjonsmålinger ved lange observasjonstider i systemer med interne gradienter.
Doktorgradsavhandling
  • Vis forfatter(e) 2019. Characterizing mass transport in hydrogels using Nuclear Magnetic Resonance.
  • Vis forfatter(e) 2015. Characterizing liquid dynamics and surface interactions in porous materials using Nuclear Magnetic Resonance.
  • Vis forfatter(e) 2008. Manganese and Water in Cardiac Magnetic Resonance Imaging.
Programdeltagelse
  • Vis forfatter(e) 2006. Nye hjertebilder.
Poster
  • Vis forfatter(e) 2016. Fatty acids in wild and farmed salmon by use of MRI and Solid-state NMR.
  • Vis forfatter(e) 2014. Dynamic correlations between inhomogeneous magnetic fields, internal gradients, and transverse relaxation, as a probe for pore geometry and heterogeneity .
  • Vis forfatter(e) 2013. Investigating effects from restricted diffusion in multi-component diffusion data.
  • Vis forfatter(e) 2010. NMRD profiles of silica based contrast agents at high magnetic fields.
  • Vis forfatter(e) 2010. High Frequency Modulated Gradient Spin Echo Diffusion Measurements with Chemical Shift Resolution.
  • Vis forfatter(e) 2010. High Frequency Modulated Gradient Spin Echo Diffusion Measurements with Chemical Shift Resolution.
  • Vis forfatter(e) 2010. Dynamic correlations between susceptibility gradients and T2-relaxation as a probe for wettability properties of liquid saturated rock cores.
  • Vis forfatter(e) 2010. Dynamic correlations between susceptibility gradients and T2-relaxation as a probe for wettability properties of liquid saturated rock cores.
  • Vis forfatter(e) 2009. Field dependence of longitudinal relaxation contrast in cardiac manganese enhanced MRI.
  • Vis forfatter(e) 2007. Determination of time-dependent diffusion, T2 and water compartmentation in rat myocardium.
  • Vis forfatter(e) 2006. Separation of the Intra- and Extracellular Apparent Diffusion Coefficients (ADC) of Water in Rat Skeletal Muscle using Spectroscopic MEMRI.
  • Vis forfatter(e) 2006. Manganese-Enhanced Magnetic Resonance In Vivo Imaging of Rat Myocardium Using FLASH: Comparative Study of Contrast at 2.35T and 7T.
  • Vis forfatter(e) 2006. Characterizing Intra- and Extracellular Spaces of Skeletal Muscle In Vivo using MEMRI.
  • Vis forfatter(e) 2006. A Time-Based Study of Changes in T1 and T2 Components in Excised Rat Myocardium.
  • Vis forfatter(e) 2005. Myocardial T1 can differentiate between intracellular (ic)and extracellular (ec) water in perfused rat myocardium.
  • Vis forfatter(e) 2005. Differentiating between Intracellular and Extracellular Relaxivities in Rat Myocardium Using MEMRI.
  • Vis forfatter(e) 2005. An Analysis of Water Compartments in Excised and Perfused Rat Myocardium.
  • Vis forfatter(e) 2005. A Two-component Relaxographic Analysis of the Effects of Manganese Infusion and Stress in Rat Myocardium.
  • Vis forfatter(e) 2004. Diffusion and Relaxation in Excised Rat Myocardium Containing an Extracellular Contrast Agent.
  • Vis forfatter(e) 2004. Detrmination of manganese T1 relaxation in rat myocardium.
  • Vis forfatter(e) 2004. Correlations between transverse relaxation and internal gradients in porous systems containing oil and water.
  • Vis forfatter(e) 2004. Correlations between Longitudinal Relaxation and Diffusion in Excised Rat Myocardium.
  • Vis forfatter(e) 2002. UVB radiation effects on the metabolites, diffusion of water and the T1 and T2 relaxation times in rat lens.
  • Vis forfatter(e) 2002. Development of a virtual NMR facility.
  • Vis forfatter(e) 2000. The effect of internal magnetic field gradients on diffusion measurements in heterogeneous systems.
  • Vis forfatter(e) 2000. Diffusion measurements in porous polymer particles.
Vitenskapelig oversiktsartikkel/review
  • Vis forfatter(e) 2020. MnDPDP: Contrast agent for imaging and protection of viable tissue. Contrast Media & Molecular Imaging. 1-17.

Se fullstendig oversikt over publikasjoner i CRIStin.

  • Nanoparticles for Enhanced Oil Recovery: Phase Transition of Aluminum-Cross-Linked Partially Hydrolyzed Polyacrylamide under Low-Salinity Conditions by Rheology and Nuclear Magnetic Resonance" A. S. Kedir, J. G. Seland, A. Skauge, T. Skauge. Energy Fuels,  28 (5), 2948–2958 (2014).
  • "Nanoparticles for Enhanced Oil Recovery: Influence of pH on Aluminum-Cross-linked Partially Hydrolyzed Polyacrylamide-Investigation by Rheology and NMR" A. S. Kedir, J. G. Seland, A. Skauge, T. Skauge. Energy Fuels, 28 (4), 2343–2351, (2014), 

  • "Investigating pore to pore exchange in systems saturated with water and oil", R. T. Lewis, S. Nåden, J. G. Seland. Diffusion Fundamentals, 18 1, (2013).
  • "Relaxometric properties of gadolinium-grafted mesoporous SBA-15 silica materials with varying pore size", H. Skår, Y. Liang, E. S. Erichsen, R. Anwander, J. G. Seland. Microporous and Mesoporous Materials, 175 125. (2013).

 

  • "Screening of the relaxivity of gadolinium-loaded periodic mesoporous silica functionalized by means of soft metalorganic silylamide grafting", H. Skår, J. G. Seland, Y. Liang, N. Å. Frøystein, K. W. Törnroos, R. Anwander. European Journal of Inorganic Chemistry, 35 5969. (2013).

 

  • "A comparison of retrospectively self-gated magnetic resonance imaging and high-frequency echocardiography for characterization of left ventricular function in mice" B. H. Amundsen, M. Ericsson, J. G. Seland, T. Pavlin, Ø. Ellingsen, C. Brekken, Lab Anim. 45, 31, (2011).

 

  • "Dynamic correlations between susceptibility gradients and T2-relaxation as a probe for wettability properties of liquid saturated rock cores", T. Pavlin and J. G. Seland, Diffusion Fundamentals, 14  8, (2010).

 

  • "High Frequency Modulated Gradient Spin Echo Diffusion Measurements with Chemical Shift Resolution" J. G. Seland, Diffusion Fundamentals, 14  7, (2010).

 

  • "Dynamic Water Changes in Excised Rat Myocardium assessed by Continuous Distribution of T1 and T2” M. Bruvold, J. G. Seland, H. Brurok, P. Jynge, Magn. Reson. Med. 58 (3), 442 (2007).

 

 

 

 

 

  • “Analyzing equilibrium water exchange between myocardial tissue compartments using dynamical two-dimensional correlation experiments combined with manganese-enhanced relaxography” J. G. Seland, M. Bruvold, H. W. Anthonsen, H. Brurok, J. Krane, and P. Jynge, Magn. Reson. Med, 58 (4), 674 (2007).

  • “NMR-propagator measurements in porous media in the presence of surface relaxation and internal fields” U.M. Scheven, J.G. Seland and D.G. Cory, Magn. Reson. Imag, 23, 363, (2005).

  • “Determination of water compartments in rat myocardium using combined D-T1 and T1-T2 experiments” J. G. Seland, M. Bruvold, H. W. Anthonsen, H. Brurok, W. Nordhøy, P. Jynge, and J. Krane, Magn. Reson. Imag, 23, 354, (2005). 

  • “Correlations between diffusion, internal magnetic field gradients, and transverse relaxation in porous systems containing oil and water” J. G. Seland, K. E. Washburn, H. W. Anthonsen, and J. Krane, Phys. Rev. E. 70, 051305 (2004). 

  • “Exploring the separate NMR responses from crude oil and water simultaneously present in a rock core” G. H. Sørland,  H. W. Anthonsen, J. G. Seland,  F. Antonsen, H. C. Widerøe , and J. Krane, Appl. Magn. Reson. 26, (2004).

  • “NMR propagator measurements on flow through a random pack of porous glass beads and how they are affected by dispersion, relaxation and internal field inhomogeneities” U. M. Scheven, J. G. Seland, and D. Cory, Phys. Rev. E, 69, 021201, (2004).

  • “Background gradient suppression in pulsed gradient stimulated echo diffusion measurements” P. Z. Sun, J. G. Seland, and D. Cory, J. Magn. Reson., 161, 168, (2003).

  • “Combining PFG and CPMG NMR measurements for separate characterization of oil and water simultaneously present in heterogeneous systems” J. G. Seland, G. H. Sørland, H. W. Anthonsen, and J. Krane, Appl. Magn. Reson. 24, 41 (2003).

  • “A PFG-NMR study of restricted diffusion in heterogeneous polymer particles” J. G. Seland, M. Ottaviani, and B. Hafskjold, J. Coll. Int. Sci. 239, 168 (2001).

  • “Diffusion measurements at long observation times in the presence of spatially variable internal magnetic field gradients” J. G. Seland, G. H. Sørland, K. Zick, and B. Hafskjold, J. Magn. Reson. 146, 14 (2000).

  • “Improved convection compensated pulsed field gradient spin-echo and stimulated-echo methods” G. H. Sørland, J. G. Seland, H. W. Anthonsen, and J. Krane, J. Magn. Reson. 142, 323 (2000). 

  • “Measurement of diffusion in porous polythylene powder using PFGSTE NMR” J. G. Seland and B. Hafskjold, Magn. Reson. Imag. 16, 687 (1998).

  • “FTIR studies of the NO3 initiated degradation of but-2-yne: Mechanism and rate constant determination” J. G. Seland, I. M. W. Noremasaune, and C. J. Nielsen, J. Chem Soc. Far. Trans, 92, 3459 (1996).

 

    • Kjernemagnetisk resonans (NMR/MRI)
    • Diffusjon
    • Porøse systemer

    Vitenskaplig erfaring

    Aug. 2008 - : Førsteamanuensis, Kjemisk institutt, Universitetet i Bergen, Bergen, Norge.

    Nov. 2003-Aug. 2008: Forsker, Institutt for sirkulasjon og bildediagnostikk, Norges teknisk-naturvitenskaplige universitet, Trondheim, Norge 

    April 2005-Jul. 2005: Forsker, Department of Biomedical Engineering, Worcester Polytechnic Institute, Worcester, USA

    Jan. 2003-April. 2003: Forsker, Institutt for kjemi, Norges teknisk-naturvitenskaplige universitet, Trondheim, Norge

    April 2003-Jul. 2003: Forsker, Department of Nuclear Engineering, Massachusetts Institute of Technology, Cambridge, USA

    Jan. 2002-Des.2002: Forsker, Department of Nuclear Engineering, Massachusetts Institute of Technology, Cambridge, USA

    Jan. 2001-Des. 2001: Post Doktor, Institutt for kjemi, Norges teknisk-naturvitenskaplige universitet, Trondheim, Norge

    Utdannelse

    Dr. Ing. i fysikalsk kjemi, Norges teknisk-naturvitenskaplige universitet, Trondheim, Norge, 2000

    Hovedfag i fysikalsk kjemi, Universitet i Oslo, Oslo, Norge, 1994

     

     

    Forskergrupper