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Träfflista för sökning "WAKA:ref ;lar1:(cth);pers:(Kasemo Bengt 1942)"

Sökning: WAKA:ref > Chalmers tekniska högskola > Kasemo Bengt 1942

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  • Andersson, Ann-Sofie, et al. (författare)
  • Cell adhesion on supported lipid bilayers
  • 2003
  • Ingår i: Journal of biomedical materials research. Part A. - : Wiley. - 1549-3296 .- 1552-4965. ; 64:4, s. 622-9
  • Tidskriftsartikel (refereegranskat)abstract
    • The cell and protein repellent properties of supported phospholipid bilayer (SPB) membranes were investigated. The SPBs were prepared by vesicle adsorption on SiO(2) surfaces. The vesicles of phosphatidylcholine fuse and rupture, and form a supported bilayer covering the surface. We carried out cell culture experiments on several surfaces, including SPBs, using two types of epithelial cells to address the cell adhesional properties. The Quartz Crystal Microbalance Dissipation (QCM-D) technique was used to monitor the SPB formation and subsequent protein adsorption. Neither cell type adhered or proliferated on SiO(2) surfaces coated with SPBs, whereas both cell types adhered and proliferated on the three control surfaces of SiO(2), tissue culture glass, and TiO(2). The QCM-D measurements showed that about two orders of magnitude less mass adsorbed on a SPB surface compared to a TiO(2) surface, from serum-containing media (10% fetal bovine serum). The reduced adsorption on the SPB is a likely explanation for the nondetectable epithelial cell adhesion on the SPB surface. Biomembranes are therefore attractive candidate systems to achieve alternating cell-resistant and cell-interacting regions on surfaces, by including specific cell-binding proteins in the latter regions.
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  • Benkoski, JJ, et al. (författare)
  • Light-activated desorption of photoactive polyelectrolytes from supported lipid bilayers
  • 2005
  • Ingår i: Macromolecules. - : American Chemical Society (ACS). - 0024-9297 .- 1520-5835. ; 38:9, s. 3852-3860
  • Tidskriftsartikel (refereegranskat)abstract
    • Phospholipid vesicles and supported bilayers have emerged as a promising platform for the development of biorecognition devices. To expand the capabilities of such biochips, it becomes desirable to direct and control the assembly of lipid structures into more sophisticated architectures. As one step toward this goal, we demonstrate the photoregulated desorption of a new class of polymer from lipid bilayers. The neutral, hydrophobic polymer resides within the bilayer under mild pH and ambient conditions. However, it contains side groups that can undergo excited state proton transfer (ESPT). The polymer therefore behaves as a polyelectrolyte when exposed to IN light. With the ensuing increase in hydrophilicity, the molecule is spontaneously ejected from the bilayer. Quartz crystal microbalance measurements with dissipation monitoring (QCM-D) have recorded this process and have shown that a rapid buffer exchange during light exposure results in efficient removal of the polymer from the system. Three polymers were tested in all: a polyanion, a polyeation, and a polyzwitterion. A one-step approach to the synthesis of the monomer, performed under relatively mild reaction conditions, made it possible to synthesize each polymer in one step.
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  • Bode, G.H., et al. (författare)
  • Detection of peptide-based nanoparticles in blood plasma by ELISA
  • 2015
  • Ingår i: PLoS ONE. - : Public Library of Science (PLoS). - 1932-6203 .- 1932-6203. ; 10:5, s. Art. no. e0126136-
  • Tidskriftsartikel (refereegranskat)abstract
    • Aims: The aim of the current study was to develop a method to detect peptide-linked nanoparticles in blood plasma. Materials & Methods: A convenient enzyme linked immunosorbent assay (ELISA) was developed for the detection of peptides functionalized with biotin and fluorescein groups. As a proof of principle, polymerized pentafluorophenyl methacrylate nanoparticles linked to biotin-carboxyfluorescein labeled peptides were intravenously injected in Wistar rats. Serial blood plasma samples were analyzed by ELISA and by liquid chromatography mass spectrometry (LC/MS) technology. Results: The ELISA based method for the detection of FITC labeled peptides had a detection limit of 1 ng/mL. We were able to accurately measure peptides bound to pentafluorophenyl meth-acrylate nanoparticles in blood plasma of rats, and similar results were obtained by LC/MS. Conclusions: We detected FITC-labeled peptides on pentafluorophenyl methacrylate nanoparticles after injection in vivo. This method can be extended to detect nanoparticles with different chemical compositions.
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  • Briand, Elisabeth, 1979, et al. (författare)
  • An OEGylated thiol monolayer for the tethering of liposomes and the study of liposome interactions
  • 2010
  • Ingår i: Talanta. - : Elsevier BV. - 0039-9140. ; 81:4-5, s. 1153-1161
  • Tidskriftsartikel (refereegranskat)abstract
    • The aim of the present work is to develop a protocol for the specific immobilization of liposomes, via tethers, onto functionalized gold surfaces, and in addition to give one example for such a surface architecture All surface functionalization steps are charcerized and controlled First, mixed thiolate self-assembled monolayers (SAMs) prepared from COOH- and OCH3-terminated oligo(ethylene glycol) (OEG) alkane thiols were characterized by polarization modulation reflection absorption infrared spectroscopy (PM-RAIRS) and by X-ray photoemission spectroscopy (XPS). The composition of the mixed SAMs was found to be close to that of the thiol solution. Next, grafting of biotin conjugated with an NH2-terminated OEG spacer (biotin-OEG-NH2) to the COOH groups via conventional amine coupling was optimized with respect to the COOH/OCH3 ratio of the SAM. The grafting of biotin-OEG-NH2 was assessed by monitoring the binding of neutravidin and albumin to the biotinylated surfaces using quartz crystal microbalance with dissipation monitoring (QCM-D), as well as by PM-RAIRS It was shown that a COOH/OCH3 ratio of around 0.3 was sufficient to saturate the SAMs with neutravidin. Finally, tethering of liposomes onto the neutravidin-terminated SAMs. was achieved. As an application example. of a close packed layer of tethered liposomes was exposed to the membrane-penetrating peptide melittin As monitored by QCM-D. the liposomes fused when interacting with the peptide and ruptured into an extended. supported lipid bilayer over the whole surface. In summary, the described surface modification has potential for the development of assays requiring tethered Intact liposomes, or tethered planar bilayers. Such surface architectures are especially important for the study of transmembrane proteins and peptides.
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Höök, Fredrik, 1966 (15)
Zäch, Michael, 1973 (14)
Jusys, Z. (12)
Wickman, Björn, 1980 (11)
Skoglundh, Magnus, 1 ... (10)
Hägglund, Carl, 1975 ... (10)
Seidel, Y. E. (10)
Dimitrievski, Kristi ... (9)
Behm, R. J. (9)
Fridell, Erik, 1963 (8)
Johansson, Stefan, 1 ... (8)
Schwind, Markus, 198 ... (8)
Frost, Rickard, 1979 (8)
Petronis, Sarunas, 1 ... (7)
Gold, Julie, 1963 (7)
Edvardsson, Malin, 1 ... (7)
Fredriksson, Hans, 1 ... (7)
Persson, Hans (6)
Larsson, Elin Maria ... (6)
Hanarp, Per, 1974 (6)
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Carlsson, Per-Anders ... (4)
Österlund, Lars, 196 ... (4)
Kunze, Angelika, 197 ... (4)
Amberntsson, Annika, ... (4)
Bergeld, Johan, 1972 (4)
Reimhult, Erik, 1974 (4)
Schneider, A. (3)
Leygraf, Christofer (3)
Käll, Mikael, 1963 (3)
Graetzel, Michael (3)
Olsson, Eva, 1960 (3)
Rydström, Jan, 1943 (3)
Engström, Per (3)
Grant, Ann W., 1964 (3)
Hellberg, Lars, 1960 (3)
Gleeson, Michael, 19 ... (3)
Hosseinpour, Saman (3)
Engbersen, J. F. J. (3)
Briand, Elisabeth, 1 ... (3)
Rodahl, Michael, 196 ... (3)
Gustavsson, Marie, 1 ... (3)
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