Geil, Burkhard

[["dc.bibliographiccitation.artnumber","051132"],["dc.bibliographiccitation.issue","5"],["dc.bibliographiccitation.journal","PHYSICAL REVIEW E"],["dc.bibliographiccitation.volume","82"],["dc.contributor.author","Diezemann, Gregor"],["dc.contributor.author","Schlesier, Thomas"],["dc.contributor.author","Geil, Burkhard"],["dc.contributor.author","Janshoff, Andreas"],["dc.date.accessioned","2018-11-07T08:36:38Z"],["dc.date.available","2018-11-07T08:36:38Z"],["dc.date.issued","2010"],["dc.description.abstract","We present a detailed analysis of two-state trajectories obtained from force-clamp spectroscopy (FCS) of reversibly bonded systems. FCS offers the unique possibility to vary the equilibrium constant in two-state kinetics, for instance, the unfolding and refolding of biomolecules, over many orders of magnitude due to the force dependence of the respective rates. We discuss two different kinds of counting statistics, the event counting usually employed in the statistical analysis of two-state kinetics and additionally the so-called cycle counting. While in the former case all transitions are counted, cycle counting means that we focus on one type of transitions. This might be advantageous in particular if the equilibrium constant is much larger or much smaller than unity because in these situations the temporal resolution of the experimental setup might not allow to capture all transitions of an event-counting analysis. We discuss how an analysis of FCS data for complex systems exhibiting dynamic disorder might be performed yielding information about the detailed force dependence of the transition rates and about the time scale of the dynamic disorder. In addition, the question as to which extent the kinetic scheme can be viewed as a Markovian two-state model is discussed."],["dc.description.sponsorship","Deutsche Forschungsgemeinschaft [SFB 625]"],["dc.identifier.doi","10.1103/PhysRevE.82.051132"],["dc.identifier.isi","000286736200002"],["dc.identifier.pmid","21230462"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/18362"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.publisher","Amer Physical Soc"],["dc.relation.issn","1539-3755"],["dc.title","Statistics of reversible bond dynamics observed in force-clamp spectroscopy"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.status","published"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.journal","European Biophysics Journal"],["dc.contributor.author","Witt, Hannes"],["dc.contributor.author","Savić, Filip"],["dc.contributor.author","Verbeek, Sarah"],["dc.contributor.author","Dietz, Jörn"],["dc.contributor.author","Tarantola, Gesa"],["dc.contributor.author","Oelkers, Marieelen"],["dc.contributor.author","Geil, Burkhard"],["dc.contributor.author","Janshoff, Andreas"],["dc.date.accessioned","2021-04-14T08:29:19Z"],["dc.date.available","2021-04-14T08:29:19Z"],["dc.date.issued","2021"],["dc.identifier.doi","10.1007/s00249-020-01490-5"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/82863"],["dc.language.iso","en"],["dc.notes.intern","DOI Import GROB-399"],["dc.relation.eissn","1432-1017"],["dc.relation.issn","0175-7571"],["dc.title","Membrane fusion studied by colloidal probes"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","6355"],["dc.bibliographiccitation.issue","17"],["dc.bibliographiccitation.journal","Physical Chemistry Chemical Physics"],["dc.bibliographiccitation.lastpage","6367"],["dc.bibliographiccitation.volume","15"],["dc.contributor.author","Nelson, H."],["dc.contributor.author","Schildmann, S."],["dc.contributor.author","Nowaczyk, A."],["dc.contributor.author","Gainaru, Catalin"],["dc.contributor.author","Geil, Burkhard"],["dc.contributor.author","Boehmer, Roland"],["dc.date.accessioned","2018-11-07T09:30:09Z"],["dc.date.available","2018-11-07T09:30:09Z"],["dc.date.issued","2013"],["dc.description.abstract","Using deuteron nuclear magnetic resonance and dielectric spectroscopy KOH doped tetrahydrofuran clathrate hydrates and KOH doped hexagonal ice are studied at temperatures above 60 and 72 K, respectively. Below these temperatures proton order is established on the lattice formed by the water molecules. In the clathrate hydrate a new type of small-angle motion is discovered using deuteron spin-spin relaxation, line-shape analysis, and stimulated-echo experiments. Based on the latter results a model is developed for the local proton motion that could successfully be tested using random-walk simulations. It is argued that the newly identified small-angle motion, obviously absent in undoped samples, is an important feature of the mechanism which accompanies the establishment of proton order not only in doped clathrate hydrates but also in doped hexagonal ice. Specific motions of OH- defects are demonstrated to explain the experimentally observed behavior. The relative importance of localized versus delocalized OH- defect motions is discussed."],["dc.description.sponsorship","Deutsche Forschungsgemeinschaft [BO1301/7-2]"],["dc.identifier.doi","10.1039/c3cp00139c"],["dc.identifier.isi","000317012800027"],["dc.identifier.pmid","23525408"],["dc.identifier.purl","https://resolver.sub.uni-goettingen.de/purl?gs-1/10194"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/31232"],["dc.notes.intern","Merged from goescholar"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.publisher","Royal Soc Chemistry"],["dc.relation.issn","1463-9084"],["dc.relation.issn","1463-9076"],["dc.rights","Goescholar"],["dc.rights.uri","https://goescholar.uni-goettingen.de/licenses"],["dc.title","Small-angle water reorientations in KOH doped hexagonal ice and clathrate hydrates"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.status","published"],["dc.type.version","published_version"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","2508"],["dc.bibliographiccitation.issue","11"],["dc.bibliographiccitation.journal","Soft Matter"],["dc.bibliographiccitation.lastpage","2516"],["dc.bibliographiccitation.volume","6"],["dc.contributor.author","Kocun, Marta"],["dc.contributor.author","Mueller, Waltraut"],["dc.contributor.author","Maskos, Michael"],["dc.contributor.author","Mey, Ingo"],["dc.contributor.author","Geil, Burkhard"],["dc.contributor.author","Steinem, Claudia"],["dc.contributor.author","Janshoff, Andreas"],["dc.date.accessioned","2017-09-07T11:46:43Z"],["dc.date.available","2017-09-07T11:46:43Z"],["dc.date.issued","2010"],["dc.description.abstract","We show how the viscoelastic properties of membranes formed from poly(butadiene)-block-poly(ethylene oxide) (PB(130)-b-PEO(66)) block copolymers can be locally accessed by atomic force microscopy. Polymer membranes are spread on microstructured porous silicon substrates from PB(130)-b-PEO(66) vesicles by decreasing the osmotic pressure of the solution. Local viscoelastic properties of the pore-spanning polymer membranes were obtained from site-specific indentation experiments. Elastic moduli of these membranes were in the order of few MPa, while the elastic moduli of crosslinked membranes considerably increased to few GPa. Furthermore, the energy dissipation and velocity dependence of the hysteresis between indentation and relaxation were quantified and compared with a modified Kelvin-Voigt model. Relaxation times were in the order of hundreds of milliseconds explaining why the stiffness of the membrane increases with increasing indentation velocity."],["dc.identifier.doi","10.1039/b924650a"],["dc.identifier.gro","3143006"],["dc.identifier.isi","000278046300021"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/473"],["dc.language.iso","en"],["dc.notes.intern","WoS Import 2017-03-10"],["dc.notes.status","final"],["dc.notes.submitter","PUB_WoS_Import"],["dc.relation.issn","1744-683X"],["dc.title","Viscoelasticity of pore-spanning polymer membranes derived from giant polymersomes"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.subtype","original"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","1063"],["dc.bibliographiccitation.issue","9"],["dc.bibliographiccitation.journal","Zeitschrift für physikalische Chemie"],["dc.bibliographiccitation.lastpage","1077"],["dc.bibliographiccitation.volume","223"],["dc.contributor.author","Pospiech, E.-M."],["dc.contributor.author","Geil, Burkhard"],["dc.contributor.author","Fujara, Franz"],["dc.contributor.author","Winter, R."],["dc.date.accessioned","2018-11-07T08:35:43Z"],["dc.date.available","2018-11-07T08:35:43Z"],["dc.date.issued","2009"],["dc.description.abstract","The influence of incorporating the polypeptide gramicidin on the lateral mobility of the monoacylglyceride monoolcin (MO) in its bicontinuous cubic lipid mesophases is studied applying static field gradient NMR. The effects of gramicidin on the topology, structure and phase behaviour of the system are characterized by small-angle x-ray scattering (SAXS) experiments. On the structural level the experiments show significant shifts in the boundaries of the various mesophases. Measurements of the translational dynamics are restricted to cubic mesophases, where the diffusion coefficients of lipid and additive are determined both by geometrical obstruction and by lipid-protein interaction effects."],["dc.description.sponsorship","DFG"],["dc.identifier.doi","10.1524/zpch.2009.6058"],["dc.identifier.isi","000271326100010"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/18142"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.publisher","Oldenbourg Verlag"],["dc.relation.issn","0942-9352"],["dc.title","The Effect of Incorporation of Gramicidin on the Translational Lipid Diffusion in Bicontinuous Cubic Monoolein/Water Mesophases"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.status","published"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","4537"],["dc.bibliographiccitation.issue","16"],["dc.bibliographiccitation.journal","The Journal of Physical Chemistry. B, Condensed Matter, Materials, Surfaces, Interfaces & Biophysical"],["dc.bibliographiccitation.lastpage","4545"],["dc.bibliographiccitation.volume","122"],["dc.contributor.author","Nöding, Helen"],["dc.contributor.author","Schön, Markus"],["dc.contributor.author","Reinermann, Corinna"],["dc.contributor.author","Dörrer, Nils"],["dc.contributor.author","Kürschner, Aileen"],["dc.contributor.author","Geil, Burkhard"],["dc.contributor.author","Mey, Ingo"],["dc.contributor.author","Heussinger, Claus"],["dc.contributor.author","Janshoff, Andreas"],["dc.contributor.author","Steinem, Claudia"],["dc.date.accessioned","2020-12-10T15:22:43Z"],["dc.date.available","2020-12-10T15:22:43Z"],["dc.date.issued","2018"],["dc.identifier.doi","10.1021/acs.jpcb.7b11491"],["dc.identifier.eissn","1520-5207"],["dc.identifier.issn","1520-6106"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/73511"],["dc.language.iso","en"],["dc.notes.intern","DOI Import GROB-354"],["dc.title","Rheology of Membrane-Attached Minimal Actin Cortices"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.artnumber","011002"],["dc.bibliographiccitation.issue","1"],["dc.bibliographiccitation.journal","Reviews of Modern Physics"],["dc.bibliographiccitation.volume","88"],["dc.contributor.author","Amann-Winkel, Katrin"],["dc.contributor.author","Böhmer, Roland"],["dc.contributor.author","Fujara, Franz"],["dc.contributor.author","Gainaru, Catalin"],["dc.contributor.author","Geil, Burkhard"],["dc.contributor.author","Loerting, Thomas"],["dc.date.accessioned","2020-12-10T18:25:53Z"],["dc.date.available","2020-12-10T18:25:53Z"],["dc.date.issued","2016"],["dc.description.abstract","Water is the most common and, judged from its numerous anomalous properties, the weirdest of all known liquids and the complexity of its pressure-temperature map is unsurpassed. A major obstacle on the way to a full understanding of water's structure and dynamics is the hard-to-explore territory within this map, colloquially named the no man's land. Many experiments suggest that just before stepping across its low-temperature border, amorphous ices undergo glass-to-liquid transitions while other interpretations emphasize the importance of underlying disordered (nano) crystalline states. Prospects for reconciling the conflicting views regarding the nature of water's glass transitions are discussed."],["dc.identifier.doi","10.1103/RevModPhys.88.011002"],["dc.identifier.eissn","1539-0756"],["dc.identifier.isi","000370254200001"],["dc.identifier.issn","0034-6861"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/75869"],["dc.language.iso","en"],["dc.notes.intern","DOI Import GROB-354"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.publisher","Amer Physical Soc"],["dc.relation.issn","1539-0756"],["dc.relation.issn","0034-6861"],["dc.title","Colloquium : Water’s controversial glass transitions"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.status","published"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","2216"],["dc.bibliographiccitation.issue","10"],["dc.bibliographiccitation.journal","Biophysical Journal"],["dc.bibliographiccitation.lastpage","2228"],["dc.bibliographiccitation.volume","110"],["dc.contributor.author","Savic, Filip"],["dc.contributor.author","Kliesch, Torben-Tobias"],["dc.contributor.author","Verbeek, Sarah"],["dc.contributor.author","Bao, Chunxiao"],["dc.contributor.author","Thiart, Jan"],["dc.contributor.author","Kros, Alexander"],["dc.contributor.author","Geil, Burkhard"],["dc.contributor.author","Janshoff, Andreas"],["dc.date.accessioned","2018-11-07T10:14:08Z"],["dc.date.available","2018-11-07T10:14:08Z"],["dc.date.issued","2016"],["dc.description.abstract","The fusion of lipid membranes is a key process in biology. It enables cells and organelles to exchange molecules with their surroundings, which otherwise could not cross the membrane barrier. To study such complex processes we use simplified artificial model systems, i.e., an optical fusion assay based on membrane-coated glass spheres. We present a technique to analyze membrane-membrane interactions in a large ensemble of particles. Detailed information on the geometry of the fusion stalk of fully fused membranes is obtained by studying the diffusional lipid dynamics with fluorescence recovery after photo-bleaching experiments. A small contact zone is a strong obstruction for the particle exchange across the fusion spot. With the aid of computer simulations, fluorescence-recovery-after-photobleaching recovery times of both fused and single-membrane-coated beads allow us to estimate the size of the contact zones between two membrane-coated beads. Minimizing delamination and bending energy leads to minimal angles close to those geometrically allowed."],["dc.description.sponsorship","SFB [803 (B08)]"],["dc.identifier.doi","10.1016/j.bpj.2016.04.026"],["dc.identifier.isi","000376436700012"],["dc.identifier.pmid","27224487"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/40569"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.publisher","Cell Press"],["dc.relation.issn","1542-0086"],["dc.relation.issn","0006-3495"],["dc.title","Geometry of the Contact Zone between Fused Membrane-Coated Beads Mimicking Cell-Cell Fusion"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.status","published"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.artnumber","224206"],["dc.bibliographiccitation.issue","22"],["dc.bibliographiccitation.journal","PHYSICAL REVIEW B"],["dc.bibliographiccitation.volume","81"],["dc.contributor.author","Nelson, H."],["dc.contributor.author","Nowaczyk, A."],["dc.contributor.author","Gainaru, Catalin"],["dc.contributor.author","Schildmann, S."],["dc.contributor.author","Geil, Burkhard"],["dc.contributor.author","Boehmer, Roland"],["dc.date.accessioned","2018-11-07T08:42:14Z"],["dc.date.available","2018-11-07T08:42:14Z"],["dc.date.issued","2010"],["dc.description.abstract","The host as well as the guest dynamics in ion doped clathrate hydrates were studied via several deuteron nuclear magnetic resonance techniques and using broadband dielectric spectroscopy in conjunction with the application of large electrical fields. At a given temperature evidence for up to three relaxation processes was found for samples with mole fractions larger than 10(-4) KOH. The two slower processes, unraveled via an electrical cleaning procedure, are similar to those detected on undoped samples in which they proceed on slightly longer time scales. The fastest process exhibits a weak temperature dependence except close to the transition into the low-temperature phase. Here, an incomplete proton order is established on the hydrate lattice and a residual orientational motion of the guest molecules could be detected at low temperatures. These results demonstrate the large degree of coupling between host and guest motions."],["dc.description.sponsorship","Deutsche Forschungsgemeinschaft [Bo1301/7-1]"],["dc.identifier.doi","10.1103/PhysRevB.81.224206"],["dc.identifier.isi","000278654900001"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/19656"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.publisher","Amer Physical Soc"],["dc.relation.issn","1098-0121"],["dc.title","Deuteron nuclear magnetic resonance and dielectric study of host and guest dynamics in KOH-doped tetrahydrofuran clathrate hydrate"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.status","published"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","576"],["dc.bibliographiccitation.issue","2"],["dc.bibliographiccitation.journal","Physical Chemistry Chemical Physics"],["dc.bibliographiccitation.lastpage","580"],["dc.bibliographiccitation.volume","15"],["dc.contributor.author","Loew, Florian"],["dc.contributor.author","Amann-Winkel, Katrin"],["dc.contributor.author","Geil, Burkhard"],["dc.contributor.author","Loerting, Thomas"],["dc.contributor.author","Wittich, Carolin"],["dc.contributor.author","Fujara, Franz"],["dc.date.accessioned","2018-11-07T09:30:16Z"],["dc.date.available","2018-11-07T09:30:16Z"],["dc.date.issued","2013"],["dc.description.abstract","The high-frequency reorientation dynamics of O-H-2 bonds is investigated in various amorphous ices including eHDA (expanded high density amorphous ice), LDA-II (low density amorphous ice II) and HGW (hyperquenched glassy water) using H-2-NMR spin-lattice relaxation as a local probe. Both low density forms, HGW and LDA-II, show similar spin-lattice relaxation but differ in the thermal stability with respect to the transition into crystalline cubic ice I-c. HGW already transforms slightly above 135 K whereas LDA-II crystallizes at 150 K. eHDA is distinguishable from other high density amorphous ices in its thermal stability and spin-lattice relaxation. Its relaxation times are much larger compared to those of VHDA (very high density amorphous ice) and uHDA (unrelaxed high density amorphous ice). eHDA does not show annealing effects, transforms sharply into LDA-II above 123 K and provides higher thermal stability as compared to other high density forms."],["dc.description.sponsorship","Austrian Science Fund [T463, Y391]; European Research Council"],["dc.identifier.doi","10.1039/c2cp43543h"],["dc.identifier.isi","000311963600022"],["dc.identifier.pmid","23183587"],["dc.identifier.purl","https://resolver.sub.uni-goettingen.de/purl?gs-1/10215"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/31264"],["dc.notes.intern","Merged from goescholar"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.publisher","Royal Soc Chemistry"],["dc.relation.issn","1463-9076"],["dc.rights","Goescholar"],["dc.rights.uri","https://goescholar.uni-goettingen.de/licenses"],["dc.title","Limits of metastability in amorphous ices: H-2-NMR relaxation"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.status","published"],["dc.type.version","published_version"],["dspace.entity.type","Publication"]]