Ørjan Grøttem Martinsen

Professor - Electronics
Image of Ørjan Grøttem Martinsen
Norwegian version of this page
Phone +47 22856474
Username
Visiting address Sem Sælands vei 24 Fysikkbygningen 0371 Oslo
Postal address Postboks 1048 Blindern 0316 Oslo

Academic Interests

My research is mainly on the passive electrical properties of biological materials (bioimpedance). Since these properties are highly influenced by the anatomy and physiology of the tissue, bioimpedance measurements can be used for characterization or diagnostication of the tissue. It is e.g. possible to use bioimpedance measurements to classify cancerous tissue, to separate between different qualities of meat, to assess the moisture content of the skin or the stress level of a person. These are just a few of numerous possible applications of bioimpedance technology in medicine, biology, sports, cosmetics and psychology. My particular expertise is within bioimpedance basic theory, instrumentation, electrode systems, non-linear phenomena, and modeling.

Teaching

Earlier

Current

Higher education and employment history

I became an electrical engineer in 1983 and was employed for some years at Siemens AS working with transformer and power stations. I then continued my education at the University of Oslo and became a Cand. Scient. in electronics/instrumentation in 1990.Then Dr. Scient. in 1995 on a thesis on the electrical properties of human skin. Since then I have worked at the Department of Physics, University of Oslo, from 2002 as a full professor. I also have a part time position as researcher at the Department of Clinical and Biomedical Engineering at Oslo University Hospital.

Appointments

Recognition

  • IEEE Senior Member, 2006
  • CLABIO Award, 2012
  • Fellow at Institute of Physics (FInstP), 2015
  • Dr. Honoris Causa, Tallinn University of Technology, Estonia, 2018
  • University of Oslo Innovation Prize, 2019
  • Member Norwegian Academy of Technological Sciences, 2021
Tags: Biomedical physics, Electronics, Electric properties, Bioimpedance

Publications

  • Abie, Sisay Mebre; Münch, Daniel; Egelandsdal, Bjørg; Bjerke, Frøydis; Wergeland, Ivar & Martinsen, Ørjan Grøttem (2021). Combined 0.2 T static magnetic field and 20 kHz, 2 V/cm square wave electric field do not affect supercooling and freezing time of saline solution and meat samples. Journal of Food Engineering. ISSN 0260-8774. 311. doi: 10.1016/j.jfoodeng.2021.110710.
  • Holm, Sverre; Holm, Thomas & Martinsen, Ørjan Grøttem (2021). Simple circuit equivalents for the constant phase element. PLOS ONE. ISSN 1932-6203. 16(3). doi: 10.1371/journal.pone.0248786. Full text in Research Archive
  • Abie, Sisay Mebre; Martinsen, Ørjan Grøttem; Egelandsdal, Bjørg; Hou, Jie; Bjerke, Frøydis & Mason, Alex [Show all 7 contributors for this article] (2021). Feasibility of using electrical impedance spectroscopy for assessing biological cell damage during freezing and thawing. Sensors. ISSN 1424-8220. 21(12). doi: 10.3390/s21124129.
  • Hou, Jie; Strand-Amundsen, Runar; Tronstad, Christian; Høgetveit, Jan Olav; Martinsen, Ørjan Grøttem & Tønnessen, Tor Inge (2021). Automatic prediction of ischemia-reperfusion injury of small intestine using convolutional neural networks: A pilot study. Sensors. ISSN 1424-8220. 21(19). doi: 10.3390/s21196691.
  • Hou, Jie; Abie, Sisay Mebre; Strand-Amundsen, Runar; Galperin, Yuri; Bergli, Joakim & Schuelke, Christin [Show all 8 contributors for this article] (2021). Temperature dependence of the microwave dielectric properties of γ -aminobutyric acid. Scientific Reports. ISSN 2045-2322. 11(1). doi: 10.1038/s41598-021-97178-7.
  • Restan, Magnus Saed; Skjærvø, Øystein; Martinsen, Ørjan Grøttem & Pedersen-Bjergaard, Stig (2020). Towards exhaustive electromembrane extraction under stagnant conditions. Analytica Chimica Acta. ISSN 0003-2670. 1104, p. 1–9. doi: 10.1016/j.aca.2020.01.058. Full text in Research Archive
  • Drobnjak, Milena; Hansen, Frederik; Øiestad, Elisabeth Leere; Løvli, Trond; Trones, Roger & Martinsen, Ørjan Grøttem [Show all 7 contributors for this article] (2020). Electromembrane extraction with vials of conducting polymer. LC GC North America. ISSN 1527-5949. 38, p. 435–439.
  • Bari, Dindar S.; Aldosky, Haval Y. Yacoob; Tronstad, Christian & Martinsen, Ørjan Grøttem (2020). The correlations among the skin conductance features responding to physiological stress stimuli. Skin research and technology. ISSN 0909-752X. p. 1–7. doi: 10.1111/srt.12989.
  • Amini, Maryam; Kalvøy, Håvard & Martinsen, Ørjan Grøttem (2020). Finite element simulation of the impedance response of a vascular segment as a function of changes in electrode configuration. Journal of Electrical Bioimpedance. ISSN 1891-5469. 11(1), p. 112–131. doi: 10.2478/JOEB-2020-0017. Full text in Research Archive
  • Bari, Dindar S.; Yacoob Aldosky, Haval Y. & Martinsen, Ørjan Grøttem (2020). Simultaneous measurement of electrodermal activity components correlated with age-related differences. Journal of biological physics (Print). ISSN 0092-0606. 46(2), p. 177–188. doi: 10.1007/s10867-020-09547-4.
  • Sanchez, Benjamin; Martinsen, Ørjan Grøttem; Freeborn, Todd J. & Furse, Cynthia M. (2020). Electrical impedance myography: A critical review and outlook. Clinical Neurophysiology. ISSN 1388-2457. 132(2), p. 338–344. doi: 10.1016/j.clinph.2020.11.014.
  • Amini, Maryam; Hisdal, Jonny; Rosales, Antonio; Kalvøy, Håvard & Martinsen, Ørjan Grøttem (2020). Evaluating the Effects of Cold Storage on Vascular Grafts Using Bioimpedance Measurement Techniques. International Federation for Medical and Biological Engineering Proceedings. ISSN 1680-0737. p. 127–132. doi: 10.1007/978-981-13-3498-6_19.
  • Cunha, Andrè Bastos da; Schuelke, Christin; Heiskanen, Arto; Asif, Afia; Hassan, Yasmin M. & Keller, Stephan S. [Show all 10 contributors for this article] (2020). Bioimpedance Measurements on Human Neural Stem Cells as a Benchmark for the Development of Smart Mobile Biomedical Applications. International Federation for Medical and Biological Engineering Proceedings. ISSN 1680-0737. 72, p. 38–47. doi: 10.1007/978-981-13-3498-6_6. Full text in Research Archive
  • Amini, Maryam; Niemi, Essi Maria; Hisdal, Jonny; Kalvøy, Håvard; Tronstad, Christian & Scholz, Hanne [Show all 8 contributors for this article] (2020). Monitoring the quality of frozen-thawed venous segments using bioimpedance spectroscopy . Physiological Measurement. ISSN 0967-3334. 41(4). doi: 10.1088/1361-6579/ab85b7. Full text in Research Archive
  • Tariverdi, Abbas; Venkiteswaran, Venkatasubramanian Kalpathy; Martinsen, Ørjan Grøttem; Elle, Ole Jacob; Tørresen, Jim & Misra, Sarthak (2020). Dynamic modeling of soft continuum manipulators using lie group variational integration. PLOS ONE. ISSN 1932-6203. 15:e0236121(7), p. 1–29. doi: 10.1371/journal.pone.0236121. Full text in Research Archive
  • Tronstad, Christian; Martinsen, Tormod; Olsen, Morten; Rosseland, Leiv Arne; Pettersen, Fred-Johan & Martinsen, Ørjan Grøttem [Show all 8 contributors for this article] (2020). Splitting one ventilator for multiple patients - a technical assessment. arXiv.org. ISSN 2331-8422.
  • Martinsen, Tormod; Pettersen, Fred-Johan; Kalvøy, Håvard; Tronstad, Christian; Kvarstein, Gunnvald & Bakken, André [Show all 10 contributors for this article] (2019). Electrosurgery and temperature increase in tissue with a passive metal implant. Frontiers in surgery. ISSN 2296-875X. 6:8, p. 1–8. doi: 10.3389/fsurg.2019.00008. Full text in Research Archive
  • Elvebakk, Ole; Tronstad, Christian; Birkeland, Kåre I.; Jenssen, Trond Geir; Bjørgaas, Marit Ragnhild Rokne & Gulseth, Hanne Løvdal [Show all 9 contributors for this article] (2019). A multiparameter model for non-invasive detection of hypoglycemia. Physiological Measurement. ISSN 0967-3334. 40(8), p. 1–14. doi: 10.1088/1361-6579/ab3676. Full text in Research Archive
  • Pabst, Oliver; Martinsen, Ørjan Grøttem & Chua, Leon (2019). Information can be stored in the human skin memristor which has non-volatile memory. Scientific Reports. ISSN 2045-2322. 9(1). doi: 10.1038/s41598-019-55749-9. Full text in Research Archive
  • Martinsen, Ørjan Grøttem; Kalvøy, Håvard; Bari, Dindar S. & Tronstad, Christian (2019). A circuit for simultaneous measurements of skin electrical conductance, susceptance, and potential. Journal of Electrical Bioimpedance. ISSN 1891-5469. 10, p. 110–112. doi: 10.2478/joeb-2019-0016. Full text in Research Archive
  • Egelandsdal, Bjørg; Abie, Sisay Mebre; Bjarnadottir, Stefania; Zhu, Han; Kolstad, Hilde Raanaas & Bjerke, Frøydis [Show all 9 contributors for this article] (2019). Detectability of the degree of freeze damage in meat depends on analytic-tool selection. Meat Science. ISSN 0309-1740. 152, p. 8–19. doi: 10.1016/j.meatsci.2019.02.002. Full text in Research Archive
  • Tronstad, Christian; Elvebakk, Ole; Staal, Odd Martin; Kalvøy, Håvard; Høgetveit, Jan Olav & Jenssen, Trond Geir [Show all 8 contributors for this article] (2019). Non-invasive prediction of blood glucose trends during hypoglycemia. Analytica Chimica Acta. ISSN 0003-2670. 1052, p. 37–48. doi: 10.1016/j.aca.2018.12.009.
  • Pabst, Oliver & Martinsen, Ørjan Grøttem (2019). Simulation based comparison between a transversal and a tangential memristor model with a capacitance in parallel. PLOS ONE. ISSN 1932-6203. 14(8). doi: 10.1371/journal.pone.0221533. Full text in Research Archive
  • Aria, Shafa; Elfarri, Yassine; Elvegård, Marius; Gottfridsson, Adam; Grønaas, Halvor & Harang, Sigve Smedsrud [Show all 25 contributors for this article] (2019). Measuring blood pulse wave velocity with bioimpedance in different age groups. Sensors. ISSN 1424-8220. 19:850(4), p. 1–10. doi: 10.3390/s19040850. Full text in Research Archive
  • Andersen, Jan-Hugo; Bjerke, Olav; Blakaj, Fatos; Flugsrud, Vilde Moe; Jacobsen, Fredrik Alstad & Jonsson, Marius [Show all 24 contributors for this article] (2019). Bioimpedance and NIR for non-invasive assessment of blood glucose. Journal of Electrical Bioimpedance. ISSN 1891-5469. 10, p. 133–138. doi: 10.2478/joeb-2019-0019.
  • Strand-Amundsen, Runar James; Tronstad, Christian; Kalvøy, Håvard; Ruud, Tom Erik; Høgetveit, Jan Olav & Martinsen, Ørjan Grøttem [Show all 7 contributors for this article] (2018). Small intestinal ischemia and reperfusion - Bioimpedance measurements. Physiological Measurement. ISSN 0967-3334. 39(2). doi: 10.1088/1361-6579/aaa576. Full text in Research Archive
  • Elvebakk, Ole; Tronstad, Christian; Birkeland, Kåre I.; Jenssen, Trond Geir; Bjørgaas, Marit Ragnhild Rokne & Frøslie, Kathrine Frey [Show all 10 contributors for this article] (2018). Evaluation of hypoglycaemia with non-invasive sensors in people with type 1 diabetes and impaired awareness of hypoglycaemia. Scientific Reports. ISSN 2045-2322. 8:14722, p. 1–11. doi: 10.1038/s41598-018-33189-1. Full text in Research Archive
  • Bari, D. S.; Aldosoky, H. Y. Y.; Tronstad, Christian; Kalvøy, Håvard & Martinsen, Ørjan Grøttem (2018). Electrodermal activity responses for quantitative assessment of felt pain. Journal of Electrical Bioimpedance. ISSN 1891-5469. 9, p. 52–58. doi: 10.2478/joeb-2018-0010. Full text in Research Archive
  • Pabst, Oliver; Martinsen, Ørjan Grøttem & Chua, Leon (2018). The non-linear electrical properties of human skin make it a generic memristor. Scientific Reports. ISSN 2045-2322. 8(1), p. 1–9. doi: 10.1038/s41598-018-34059-6. Full text in Research Archive
  • Bari, Dindar S.; Aldosky, Haval Y. Yacoob; Tronstad, Christian; Kalvøy, Håvard & Martinsen, Ørjan Grøttem (2018). Influence of relative humidity on electrodermal levels and responses. Skin Pharmacology and Physiology. ISSN 1660-5527. 31, p. 298–307. doi: 10.1159/000492275.
  • Pabst, Oliver & Martinsen, Ørjan Grøttem (2017). Interpretation of the pinched point position in human skin memristor measurements. International Federation for Medical and Biological Engineering Proceedings. ISSN 1680-0737. 65, p. 430–433. doi: 10.1007/978-981-10-5122-7_108. Full text in Research Archive
  • Restan, Magnus Saed; Jensen, Henrik; Shen, Xiantao; Huang, Chuixiu; Martinsen, Ørjan Grøttem & Kubáň, Pavel [Show all 8 contributors for this article] (2017). Comprehensive study of buffer systems and local pH effects in electromembrane extraction. Analytica Chimica Acta. ISSN 0003-2670. 984, p. 116–123. doi: 10.1016/j.aca.2017.06.049.
  • Strand-Amundsen, Runar James; Reims, Henrik Mikael; Tronstad, Christian; Kalvøy, Håvard; Martinsen, Ørjan Grøttem & Høgetveit, Jan Olav [Show all 8 contributors for this article] (2017). Ischemic small intestine - In vivo versus ex vivo bioimpedance measurements. Physiological Measurement. ISSN 0967-3334. 38(5), p. 715–728. doi: 10.1088/1361-6579/aa67b7.
  • Tronstad, Christian; Elvebakk, Ole; Kalvøy, Håvard; Bjørgaas, Marit Ragnhild Rokne & Martinsen, Ørjan Grøttem (2017). Detection of sympathoadrenal discharge by parameterisation of skin conductance and ECG measurement. IEEE Engineering in Medicine and Biology Society. Conference Proceedings. ISSN 1557-170X. p. 3997–4000. doi: 10.1109/EMBC.2017.8037732.
  • Pabst, Oliver; Tronstad, Christian & Martinsen, Ørjan Grøttem (2017). Instrumentation, electrode choice and challenges in human skin memristor measurement. IEEE Engineering in Medicine and Biology Society. Conference Proceedings. ISSN 1557-170X. p. 1844–1848. doi: 10.1109/EMBC.2017.8037205.
  • Pabst, Oliver; Tronstad, Christian; Grimnes, Sverre; Fowles, Don C. & Martinsen, Ørjan Grøttem (2017). Comparison between the AC and DC measurement of electrodermal activity. Psychophysiology. ISSN 0048-5772. 54(3), p. 374–385. doi: 10.1111/psyp.12803.
  • Adamczak, Malgorzata Iwona; Martinsen, Ørjan Grøttem; Smistad, Gro & Hiorth, Marianne (2017). Polymer coated mucoadhesive liposomes intended for the management of xerostomia. International Journal of Pharmaceutics. ISSN 0378-5173. 527(1-2), p. 72–78. doi: 10.1016/j.ijpharm.2017.05.032. Full text in Research Archive
  • Skjærvø, Øystein; Brandtzaeg, Ole Kristian; Lausund, Kristian Blindheim; Pabst, Oliver; Martinsen, Ørjan Grøttem & Lundanes, Elsa [Show all 7 contributors for this article] (2017). Exploring bioimpendance instrumentation for the characterization of open tubular liquid chromatography columns. Journal of Chromatography A. ISSN 0021-9673. 1534, p. 195–200. doi: 10.1016/j.chroma.2017.12.060.
  • Schwingenschuh, Simon; Scharfetter, Hermann; Martinsen, Ørjan Grøttem; Boulgaropoulos, Beate; Augustin, Thomas & Tiffner, Katrin [Show all 12 contributors for this article] (2017). Assessment of skin permeability to topically applied drugs by skin impedance and admittance. Physiological Measurement. ISSN 0967-3334. 38(11), p. N138–N150. doi: 10.1088/1361-6579/aa904e.
  • Bari, D. S.; Aldosky, H. Y. Y.; Tronstad, Christian; Kalvøy, Håvard & Martinsen, Ørjan Grøttem (2017). Electrodermal responses to discrete stimuli measured by skin conductance, skin potential, and skin susceptance. Skin research and technology. ISSN 0909-752X. 24(1), p. 108–116. doi: 10.1111/srt.12397.
  • Abie, Sisay Mebre; Bergli, Joakim; Galperin, Yuri & Martinsen, Ørjan Grøttem (2016). Universality of AC conductance in human hair. Biomedical Engineering & Physics Express. ISSN 2057-1976. 2. doi: 10.1088/2057-1976/2/2/027002.
  • Strand-Amundsen, Runar James; Tronstad, Christian; Kalvøy, Håvard; Gundersen, Yngvar; Krohn, Claus Danckert & Aasen, Ansgar Oddne [Show all 11 contributors for this article] (2016). In vivo characterization of ischemic small intestine using bioimpedance measurements. Physiological Measurement. ISSN 0967-3334. 37(2), p. 257–275. doi: 10.1088/0967-3334/37/2/257.
  • Canali, Chiara; Aristovich, Kirill; Ceccarelli, L.; Larsen, L. B.; Martinsen, Ørjan Grøttem & Wolff, A. [Show all 9 contributors for this article] (2016). Electrical impedance tomography methods for miniaturised 3D systems. Journal of Electrical Bioimpedance. ISSN 1891-5469. 7, p. 59–67. doi: 10.5617/jeb.4084.
  • Pettersen, Fred Johan; Martinsen, Ørjan Grøttem; Høgetveit, Jan Olav; Kalvøy, Håvard & Odland, Hans Henrik (2016). Bioimpedance spectroscopy of temporal impedance changes in a beating heart. Biomedical Engineering & Physics Express. ISSN 2057-1976. 2. doi: 10.1088/2057-1976/2/6/065015.
  • Adamczak, Malgorzata Iwona; Martinsen, Ørjan Grøttem; Smistad, Gro & Hiorth, Marianne (2016). Water sorption properties of HM-pectin and liposomes intended to alleviate dry mouth. International Journal of Pharmaceutics. ISSN 0378-5173. 506(1-2), p. 201–206. doi: 10.1016/j.ijpharm.2016.04.050. Full text in Research Archive
  • Canali, Chiara; Heiskanen, Arto; Martinsen, Ørjan Grøttem; Mohanty, Soumyaranjan; Dufva, Martin & Wolff, Anders [Show all 7 contributors for this article] (2016). Impedance-based monitoring for tissue engineering applications. International Federation for Medical and Biological Engineering Proceedings. ISSN 1680-0737. 54, p. 36–39. doi: 10.1007/978-981-287-928-8_10.
  • Canali, Chiara; Heiskanen, Arto; Muhammad, Haseena Bashir; Høyum, Per; Pettersen, Fred-Johan & Mette, Hemmingsen [Show all 10 contributors for this article] (2015). Bioimpedance monitoring of 3D cell culturing-Complementary electrode configurations for enhanced spatial sensitivity. Biosensors & bioelectronics. ISSN 0956-5663. 63, p. 72–79. doi: 10.1016/j.bios.2014.07.020.
  • Martinsen, Ørjan Grøttem; Pabst, Oliver; Tronstad, Christian & Grimnes, Sverre (2015). Sources of error in AC measurement of skin conductance. Journal of Electrical Bioimpedance. ISSN 1891-5469. 6(1), p. 49–53. doi: 10.5617/jeb.2640.
  • Canali, Chiara; Mohanty, Soumyaranjan; Heiskanen, Arto; Muhammad, Haseena Bashir; Martinsen, Ørjan Grøttem & Dufva, Martin [Show all 8 contributors for this article] (2015). Impedance spectroscopic characterisation of porosity in 3D cell culture scaffolds with different channel networks. Electroanalysis. ISSN 1040-0397. 27(1), p. 193–199. doi: 10.1002/elan.201400413.
  • Canali, Chiara; Mazzoni, Carmine; Larsen, Layla Bashir; Heiskanen, Arto; Martinsen, Ørjan Grøttem & Wolff, Anders [Show all 8 contributors for this article] (2015). An impedance method for spatial sensing of 3D cell constructs - towards applications in tissue engineering. The Analyst. ISSN 0003-2654. 140(17), p. 6079–6088. doi: 10.1039/c5an00987a.
  • Canali, Chiara; Larsen, L. B.; Martinsen, Ørjan Grøttem & Heiskanen, Arto (2015). Conductometric analysis in bio-applications: a universal impedance spectroscopy-based approach using modified electrodes. Sensors and actuators. B, Chemical. ISSN 0925-4005. 212, p. 544–550. doi: 10.1016/j.snb.2015.02.029.
  • Kalvøy, Håvard; Aliau-Bonet, C; Pallas-Areny, R. & Martinsen, Ørjan Grøttem (2015). Effects of stray capacitance to ground in three electrode monopolar needle bioimpedance measurements. IEEE Engineering in Medicine and Biology Society. Conference Proceedings. ISSN 1557-170X. 2015-November, p. 7542–7545. doi: 10.1109/EMBC.2015.7320137.
  • Pettersen, Fred Johan; Martinsen, Tormod; Høgetveit, Jan Olav & Martinsen, Ørjan Grøttem (2015). Unintentional heating at implants when using electrosurgery. IEEE Engineering in Medicine and Biology Society. Conference Proceedings. ISSN 1557-170X. p. 5805–5808. doi: 10.1109/EMBC.2015.7319711.
  • Tronstad, Christian; Staal, Odd Martin; Saelid, Steinar & Martinsen, Ørjan Grøttem (2015). Model- based filtering for artifact and noise suppression with state estimation for electrodermal activity measurements in real time. IEEE Engineering in Medicine and Biology Society. Conference Proceedings. ISSN 1557-170X. p. 2750–2753. doi: 10.1109/EMBC.2015.7318961.
  • Nordbotten, Bernt Jørgen; Tronstad, Christian; Martinsen, Ørjan Grøttem & Grimnes, Sverre (2014). Estimation of skin conductance at low frequencies using measurements at higher frequencies for EDA applications. Physiological Measurement. ISSN 0967-3334. 35(6), p. 1011–1018. doi: 10.1088/0967-3334/35/6/1011.
  • Pettersen, Fred Johan; Ferdous, Humayra; Kalvøy, Håvard; Martinsen, Ørjan Grøttem & Høgetveit, Jan Olav (2014). Comparison of four different FIM configurations - A simulation study. Physiological Measurement. ISSN 0967-3334. 35(6), p. 1067–1082. doi: 10.1088/0967-3334/35/6/1067.
  • Øyri, Karl; Chavez-Santiago, Raul; Støa, Stig; Martinsen, Ørjan Grøttem; Balasingham, Ilangko & Fosse, Erik (2014). Wireless vital signs from a life-supporting medical device exposed to electromagnetic disturbance. MITAT. Minimally invasive therapy & allied technologies. ISSN 1364-5706. 23(6), p. 341–349. doi: 10.3109/13645706.2014.931869.
  • Martinsen, Ørjan Grøttem; Nordbotten, Bernt Jørgen; Grimnes, Sverre; Fossan, Helge & Eilevstjonn, Joar (2014). Bioimpedance-based respiration monitoring with a defibrillator. IEEE Transactions on Biomedical Engineering. ISSN 0018-9294. 61(6), p. 1858–1862. doi: 10.1109/TBME.2014.2308924.

View all works in Cristin

View all works in Cristin

  • Schuelke, Christin; Cunha, Andrè Bastos da; Heiskanen, Arto; Asif, Afia; Keller, Stephan S. & Martínez-Serrano, Alberto [Show all 8 contributors for this article] (2020). Neural Stem Cell Characterization and Detection of Neurotransmitter release using Bioimpedance and Electrochemistry.
  • Azumah, Joseph; Hiorth, Marianne; Smistad, Gro & Martinsen, Ørjan Grøttem (2019). Alginate and chitosan coated liposomes intended for treatment of dry mouth.
  • Azumah, Joseph; Hiorth, Marianne; Smistad, Gro & Martinsen, Ørjan Grøttem (2019). Development of alginate and chitosan coated liposomes intended to use in the treatment of xerostomia.
  • Azumah, Joseph; Smistad, Gro; Martinsen, Ørjan Grøttem & Hiorth, Marianne (2019). Development of alginate coated liposomes with potential of being used in treatment of dry mouth.
  • Martinsen, Ørjan Grøttem (2016). The dark side of open access. Journal of Electrical Bioimpedance. ISSN 1891-5469. 7, p. 1–1. doi: 10.5617/jeb.2960.
  • Pettersen, Fred Johan; Martinsen, Ørjan Grøttem; Høgetveit, Jan Olav; Flattum, M.; Kalvøy, Håvard & Odland, Hans Henrik (2016). Using pacemaker leads for bioimpedance and electromyography. Proceedings of the 16th International Conference on Electrical Bioimpedance.
  • Strand-Amundsen, Runar James; Tronstad, Christian; Martinsen, Ørjan Grøttem; Høgetveit, Jan Olav; Ruud, TE & Tønnessen, Tor Inge (2016). Bioimpedance - in vivo vs in vitro ischemic small intestine. Proceedings of the 16th International Conference on Electrical Bioimpedance.
  • Martinsen, Ørjan Grøttem; Abie, Sisay Mebre; Bergli, Joakim & Galperin, Yuri (2016). Universality of low frequency conductance of human hair. Proceedings of the 16th International Conference on Electrical Bioimpedance.
  • Broeze, K.; Elzen, R. van der; Rijssel, M.J. van; Eijnatten, M.A. van; Verdaasdonk, R.M. & Martinsen, Ørjan Grøttem [Show all 7 contributors for this article] (2016). Quest for the proper B-point in the ICG by echocardiography. Proceedings of the 16th International Conference on Electrical Bioimpedance.
  • Pabst, Oliver & Martinsen, Ørjan Grøttem (2016). Investigating the memristive properties of skin. Proceedings of the 16th International Conference on Electrical Bioimpedance.
  • Kalvøy, Håvard; Sauter, Axel Rudolf; Tronstad, Christian & Martinsen, Ørjan Grøttem (2016). Neural tissue discrimination with machine learning methods. Proceedings of the 16th International Conference on Electrical Bioimpedance.
  • Pabst, Oliver; Tronstad, Christian; Martinsen, Ørjan Grøttem & Grimnes, Sverre (2016). Comparison between AC and DC exosomatic EDA measuring methods. Proceedings of the 16th International Conference on Electrical Bioimpedance.
  • Broeze, K.; Elzen, R. van der; Rijssel, M.J. van; Eijnatten, M.A. van; Verdaasdonk, R.M. & Martinsen, Ørjan Grøttem [Show all 7 contributors for this article] (2016). The X-point in the ICGmarks aortic valves closure. Proceedings of the 16th International Conference on Electrical Bioimpedance.
  • Tronstad, Christian; Elvebakk, Ole; Martinsen, Ørjan Grøttem; Kalvøy, Håvard & Høgetveit, Jan Olav (2016). Bioimpedance for prediction of hypoglycemic trends. Proceedings of the 16th International Conference on Electrical Bioimpedance.
  • Bergli, Joakim; Galperin, Yuri; Martinsen, Ørjan Grøttem & Abie, Sisay Mebre (2016). Universality of AC conductance in human hair.
  • Skjærvø, Øystein; Brandtzæg, Ole Kristian Merkesvik; Martinsen, Ørjan Grøttem; Lundanes, Elsa & Wilson, Steven Ray Haakon (2016). Characterization of polymer layer open tubular columns for liquid chromatography and open tubular enzyme reactors for on-line sample preparation.
  • Adamczak, Malgorzata Iwona; Hagesæther, Ellen; Hiorth, Marianne; Martinsen, Ørjan Grøttem; Sediqi, Nadia & Smistad, Gro (2015). Chitosan-based nanoparticles and chitosan-coated liposomes for drug delivery to the oral cavity.
  • Canali, Chiara; Muhammad, H. B.; Heiskanen, Arto; Mazzoni, C.; Ceccarelli, L. & Martinsen, Ørjan Grøttem [Show all 10 contributors for this article] (2015). Enhanced multielectrode configurations in miniaturized 3D electrical impedance spectroscopy and tomography - monitoring the overall process of tissue engineering with spatial sensing for future challenges in microfluidics.
  • Caviglia, C.; Canali, Chiara; Zor, K.; Muhammad, H. B.; Heiskanen, Arto & Martinsen, Ørjan Grøttem [Show all 10 contributors for this article] (2015). On-line monitoring of 2D and 3D cell cultures: electrode configurations for impedance based sensors.
  • Kalvøy, Håvard; Aliau-Bonet, C.; Pallas-Areny, R. & Martinsen, Ørjan Grøttem (2015). Effects of stray capacitance to ground in three electrode monopolar needle bioimpedance measurements.
  • Elvebakk, Ole; Tronstad, Christian; Gulseth, Hanne Løvdal; Jenssen, Trond Geir; Bjørgaas, Marit Ragnhild Rokne & Høgetveit, Jan Olav [Show all 8 contributors for this article] (2015). Physiological and symptomatic responses to hypoglycemia in patients with impaired awareness.
  • Canali, Chiara; Muhammad, H. B.; Heiskanen, A.; Mazzoni, C.; Ceccarelli, L. & Martinsen, Ørjan Grøttem [Show all 9 contributors for this article] (2015). Electrical impedance spectroscopy with optimised electrode configurations for 3D tissue engineering applications.
  • Tronstad, Christian; Staal, Odd Martin; Sælid, Steinar & Martinsen, Ørjan Grøttem (2015). Model-based filtering for artifact and noise suppression with state estimation for electrodermal activity measurements in real time .
  • Pettersen, Fred Johan; Martinsen, Tormod; Høgetveit, Jan Olav & Martinsen, Ørjan Grøttem (2015). Unintentional heating at implants when using electrosurgery.
  • Karstang, Terje V.; Sælid, Steinar; Lie, Martin F.; Dahlback, Jørgen; Berg, Bjørn & Øhlckers, Per [Show all 8 contributors for this article] (2014). A new device for continuous non-invasive blood glucose estimation based on sensor fusion.
  • Canali, Chiara; Martinsen, Ørjan Grøttem; Muhammad, H.B.; Heiskanen, A.; Dufva, M & Wolff, A. [Show all 7 contributors for this article] (2014). A multiplexed electrical impedance-based device for bioengineering applications.
  • Grimnes, Sverre & Martinsen, Ørjan Grøttem (2013). Some thoughts on bioimpedance and bioelectricity. Journal of Electrical Bioimpedance. ISSN 1891-5469. 4, p. 1–1.
  • Schwingenschuh, Simon; Hajnsek, Martins; Scharfetter, Hermann; Martinsen, Ørjan Grøttem; Tiffner, Katrin & Dragatin, Christian [Show all 10 contributors for this article] (2013). Skin impedance measurements support ex-vivo penetration studies for topical applied drugs.
  • Kalvøy, Håvard; Tronstad, Christian; Grimnes, Sverre & Martinsen, Ørjan Grøttem (2013). Simultaneous measurement of DC potential and AC conductance to monitor electrodermal activity at a single electrode.
  • Pettersen, Fred Johan; Ferdous, Humayra & Martinsen, Ørjan Grøttem (2013). Simulation of 6-electrode and 8-electrode Focused Impedance Method (FIM) using Comsol Multiphysics – A comparative study.
  • Martinsen, Ørjan Grøttem; Grimnes, Sverre; Bergli, Joakim & Galperin, Yuri (2013). Universality in the electrical conductance of human hair.
  • Amoussou-Guenou, Kuassi M.; Houndetoungan, G. D.; Fachinan, O. H.; Kalvøy, Håvard & Martinsen, Ørjan Grøttem (2013). Comparison of two filtration methods in erythrocyte deformability: determination measurement using impedancemetry.
  • Tronstad, Christian; Kalvøy, Håvard; Grimnes, Sverre & Martinsen, Ørjan Grøttem (2013). Sweat production estimated by bioimpedance and bioelectrical signals.
  • Abir, R.; Pettersen, Fred Johan; Martinsen, Ørjan Grøttem & Rabbani, K. S. (2013). Effect of a spherical object in 4 electrode Focused Impedance Method (FIM): measurement and simulation.
  • Nordbotten, Bernt Jørgen; Tronstad, Christian; Martinsen, Ørjan Grøttem & Grimnes, Sverre (2013). Estimation of skin conductance at low frequencies from measurements at higher frequencies for EDA application.
  • Elvebakk, Ole; Tronstad, Christian; Høgetveit, Jan Olav; Jenssen, Trond Geir; Bjørgaas, Marit & Martinsen, Ørjan Grøttem (2013). Sweating reactions due to hypoglycemia detected by skin AC conductance.
  • Brandtzaeg, Ole Kristian; Wilson, Steven Ray Haakon; Lundanes, Elsa; Reubsaet, Leon; Krauss, Stefan & Martinsen, Ørjan Grøttem (2018). Online sample Preparation Platforms for Targeted Nano Liquid Chromatography Mass Spectrometry Bioanalysis. Universitetet i Oslo. ISSN 1501-7710. 2018(1968).
  • Pabst, Oliver; Martinsen, Ørjan Grøttem; Tronstad, Christian & Wilson, Steven Ray Haakon (2018). Electrical properties of human skin: From linear recordings of exogenous electrodermal activity to non-linear memristor measurements. Universitetet i Oslo. ISSN 1501-7710. 2018(1971).
  • Skjærvø, Øystein; Wilson, Steven Ray Haakon; Lundanes, Elsa; Brandtzaeg, Ole Kristian & Martinsen, Ørjan Grøttem (2016). Characterization of open tubular enzyme reactors and polymer layer open tubular columns for liquid chromatography. Universitetet i Oslo.

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Published Nov. 4, 2010 12:25 PM - Last modified Sep. 2, 2021 2:53 PM
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