Blar i NTNU Open på forfatter "Stokke, Bjørn Torger"
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Actuation of a Hyperelastic PDMS Membrane Suspended inside a Microfluidic Channel: From Computer Simulation to Microfabrication
Ribe, Jonas Myren (Master thesis, 2012)This Master-project was done in the Department of Physics at NTNU in the spring of 2012. The project develops micro- and nanofabrication processes useful for lab-on-a-chip systems. These systems aim to scale down and ... -
Atomic force microscopy measurements for the surface and the interaction characterization to optimize the surface patterning for bacterial micro arrays
Muri, Harald Ian Damm Irgens (Master thesis, 2013)This Master project was done in the Department of Physics at NTNU in the spring2013. The project focus on the optimization of micro patterning techniques to producemicro arrays for single bacterial cell studies. The micro ... -
Bladder Cancer Cells Interaction with Lectin-Coated Surfaces under Static and Flow Conditions
Szydlak, Renata; Øvreeide, Ingrid Haga; Luty, Marcin; Zieliński, Tomasz; Prot, Victorien Emile; Zemła, Joanna; Stokke, Bjørn Torger; Lekka, Małgorzata (Peer reviewed; Journal article, 2023)Aberrant expression of glycans, i.e., oligosaccharide moiety covalently attached to proteins or lipids, is characteristic of various cancers, including urothelial ones. The binding of lectins to glycans is classified as ... -
Buckling initiation in layered hydrogels during transient swelling
Ilseng, Arne; Prot, Victorien Emile; Skallerud, Bjørn Helge; Stokke, Bjørn Torger (Journal article; Peer reviewed, 2019)Subjected to compressive stresses, soft polymers with stiffness gradients can display various buckling patterns. These compressive stresses can have different origins, like mechanical forces, temperature changes, or, for ... -
Characterization of Mixing Performance Induced by Double Curved Passive Mixing Structures in Microfluidic Channels
Øvreeide, Ingrid Haga; Zoellner, Andreas; Stokke, Bjørn Torger (Peer reviewed; Journal article, 2021)Functionalized sensor surfaces combined with microfluidic channels are becoming increasingly important in realizing efficient biosensing devices applicable to small sample volumes. Relaxing the limitations imposed by laminar ... -
Competitive ligand exchange of crosslinking ions for ionotropic hydrogel formation.
Bassett, David; Håti, Armend Gazmeno; Melø, Thor Bernt; Stokke, Bjørn Torger; Sikorski, Pawel (Journal article; Peer reviewed, 2016)Currently there are limitations to gelation strategies to form ionically crosslinked hydrogels, derived in particular from a lack of control over the release kinetics of crosslinking ions, which severely restrict applications. ... -
Constrained Hydrogel swelling in Biological Sensors: A Finite Element Method Approach
Sveinsson, Hrafn Mar (Master thesis, 2012)Material models has been developed for anionic and/or cationic hydrogels, with a simulation framework implemented in MATLAB and the finite element software ABAQUS. The geometry of the simulations is a hemispheroidal hydrogel, ... -
Controlling microgel fabrication and advancing understanding of bacterial transcriptional regulation by droplet-based microfluidics
Ahmed, Husnain (Doctoral theses at NTNU;2022:263, Doctoral thesis, 2022)ENGLISH Miniaturization of biological and chemical assays by the invention of Lab-on-a-chip technology has already made significant impacts in scientific domains such as biotechnology, biophysics and biomedicine. Droplet ... -
Curved passive mixing structures: a robust design to obtain efficient mixing and mass transfer in microfluidic channels
Øvreeide, Ingrid Haga; Zoellner, Andreas; Mielnik, Michal Marek; Stokke, Bjørn Torger (Peer reviewed; Journal article, 2021)Analyte mixing and delivery to a functionalized sensor surface are important to realize several advantages associated with biosensors integrated with microfluidic channels. Here, we present a comparison between a herringbone ... -
Cyclodextrin triggered dimensional changes of polysaccharide nanogel integrated hydrogels at nanometer resolution
Gao, Ming; Toita, Sayaka; Sawada, Shin-ichi; Akiyoshi, Kazunara; Stokke, Bjørn Torger (Journal article; Peer reviewed, 2013)High resolution monitoring of dimensional changes of cholesterol bearing pullulan (CHP) hydrogel was performed as a model for materials dimensional changes associated with drug delivery. Hydrogels consisting of methacryloyl ... -
Dense carbon-nanotube coating scaffolds stimulate osteogenic differentiation of mesenchymal stem cells
Mori, Hideki; Ogura, Yuko; Enomoto, Kenta; Hara, Masayuki; Maurstad, Gjertrud; Stokke, Bjørn Torger; Kitamura, Shinichi (Peer reviewed; Journal article, 2020)Carbon nanotubes (CNTs) have desirable mechanical properties for use as biomaterials in orthopedic and dental area such as bone- and tooth- substitutes. Here, we demonstrate that a glass surface densely coated with ... -
Determination of the energy landscape among biological macromolecules: The mucin-alginate case
Safaee Adl, Patricia (Master thesis, 2013)Luminal epithelial surfaces of our body are covered by a secreted layer of mucus consisting chiefly of water (95%), high molecular weight polymeric glycoproteins known as mucins (3%), and other small molecules (2%). If ... -
Development of a Smartphone-based diagnostic Tool for Jaundice
Vartdal, Gunnar (Master thesis, 2014)Jaundice is the cause of an estimated 114,100 deaths among newborn annually. Most of these deaths occur in the poorest regions of the world where current diagnostic technologies are too expensive. In this thesis, several ... -
Direct Determination of Chitosan–Mucin Interactions Using a Single-Molecule Strategy: Comparison to Alginate–Mucin Interactions
Haugstad, Kristin Elisabeth; Håti, Armend Gazmeno; Nordgård, Catherine Taylor; Adl, Patricia S.; Maurstad, Gjertrud; Sletmoen, Marit; Draget, Kurt Ingar; Dias, Rita de Sousa; Stokke, Bjørn Torger (Journal article; Peer reviewed, 2015)Aqueous chitosan possesses attractive interaction capacities with various molecular groups that can be involved in hydrogen bonds and electrostatic and hydrophobic interactions. In the present paper, we report on the direct ... -
Discrimination of Malignant and Non-Malignant Urinary Bladder Cells Using Microfluidic Constriction Deformation Cytometry
Hines, Thomas Gullvik (Master thesis, 2023)Kreft er en av de ledende dødsårsakene på verdensbasis og forårsaket en av seks dødsfall i 2020. For å redusere dødeligheten er screening og tidlig diagnose avgjørende. Studier gjort på forskjellige krefttyper, viser at ... -
DNA aptamer functionalized hydrogels for interferometric fiber-optic based continuous monitoring of potassium ions
Zurzul, Natasa; Stokke, Bjørn Torger (Peer reviewed; Journal article, 2021)In the present paper, we describe a potassium sensor based on DNA-aptamer functionalized hydrogel, that is capable of continuous label-free potassium ion (K+) monitoring with potential for in situ application. A hydrogel ... -
DNA Condensation by Peptide-Conjugated PAMAM Dendrimers. Influence of Peptide Charge
Dannert, Corinna; Mardal, Ingrid; Lale, Rahmi; Stokke, Bjørn Torger; Dias, Rita (Peer reviewed; Journal article, 2023)Nucleic acid delivery to cells is an important therapeutic strategy that requires the transport of nucleic acids to intracellular compartments and their protection from enzymatic degradation. This can be achieved through ... -
Donnan Contribution and Specific Ion Effects in Swelling of Cationic Hydrogels are Additive: Combined High-Resolution Experiments and Finite Element Modeling
Zurzul, Natasa; Ilseng, Arne; Prot, Victorien Emile; Sveinsson, Hrafn Mar; Skallerud, Bjørn Helge; Stokke, Bjørn Torger (Journal article; Peer reviewed, 2020)Finite element modeling applied to analyze experimentally determined hydrogel swelling data provides quantitative description of the hydrogel in the aqueous solutions with well-defined ionic content and environmental ... -
Effect of Glutaminase Inhibition in Basal-Like Patient-Derived Xenografts Analyzed by Magnetic Resonance Spectroscopy
Henriksen, Ida Marie (Master thesis, 2017)Breast cancer is today the leading cause for cancer related deaths among women in Europe. Decreased mortality among breast cancer patients has been observed over the last twenty years, where development and use of targeted ... -
Energy Landscape of Alginate-Epimerase Interactions Assessed by Optical Tweezers and Atomic Force Microscopy
Håti, Armend Gazmeno; Aachmann, Finn Lillelund; Stokke, Bjørn Torger; Skjåk-Bræk, Gudmund; Sletmoen, Marit (Journal article, 2015)Mannuronan C-5 epimerases are a family of enzymes that catalyze epimerization of alginates at the polymer level. This group of enzymes thus enables the tailor-making of various alginate residue sequences to attain various ...