Bock, Hannes

[["dc.bibliographiccitation.artnumber","7368"],["dc.bibliographiccitation.firstpage","204"],["dc.bibliographiccitation.journal","Nature"],["dc.bibliographiccitation.lastpage","208"],["dc.bibliographiccitation.volume","478"],["dc.contributor.author","Grotjohann, Tim"],["dc.contributor.author","Testa, Ilaria"],["dc.contributor.author","Leutenegger, Marcel"],["dc.contributor.author","Bock, Hannes"],["dc.contributor.author","Urban, Nicolai T."],["dc.contributor.author","Lavoie-Cardinal, Flavie"],["dc.contributor.author","Willig, Katrin I."],["dc.contributor.author","Eggeling, Christian"],["dc.contributor.author","Jakobs, Stefan"],["dc.contributor.author","Hell, Stefan W."],["dc.date.accessioned","2017-09-07T11:43:21Z"],["dc.date.available","2017-09-07T11:43:21Z"],["dc.date.issued","2011"],["dc.description.abstract","Lens-based optical microscopy failed to discern fluorescent features closer than 200 nm for decades, but the recent breaking of the diffraction resolution barrier by sequentially switching the fluorescence capability of adjacent features on and off is making nanoscale imaging routine. Reported fluorescence nanoscopy variants switch these features either with intense beams at defined positions or randomly, molecule by molecule. Here we demonstrate an optical nanoscopy that records raw data images from living cells and tissues with low levels of light. This advance has been facilitated by the generation of reversibly switchable enhanced green fluorescent protein (rsEGFP), a fluorescent protein that can be reversibly photoswitched more than a thousand times. Distributions of functional rsEGFP-fusion proteins in living bacteria and mammalian cells are imaged at <40-nanometre resolution. Dendritic spines in living brain slices are super-resolved with about a million times lower light intensities than before. The reversible switching also enables all-optical writing of features with subdiffraction size and spacings, which can be used for data storage."],["dc.identifier.doi","10.1038/nature10497"],["dc.identifier.gro","3142644"],["dc.identifier.isi","000295782800041"],["dc.identifier.pmid","21909116"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/71"],["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","0028-0836"],["dc.title","Diffraction-unlimited all-optical imaging and writing with a photochromic GFP"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.subtype","original"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","943"],["dc.bibliographiccitation.issue","11"],["dc.bibliographiccitation.journal","Nature Methods"],["dc.bibliographiccitation.lastpage","945"],["dc.bibliographiccitation.volume","5"],["dc.contributor.author","Fölling, Jonas"],["dc.contributor.author","Bossi, Mariano"],["dc.contributor.author","Bock, Hannes"],["dc.contributor.author","Medda, Rebecca"],["dc.contributor.author","Wurm, Christian A."],["dc.contributor.author","Hein, Birka"],["dc.contributor.author","Jakobs, Stefan"],["dc.contributor.author","Eggeling, Christian"],["dc.contributor.author","Hell, Stefan W."],["dc.date.accessioned","2017-09-07T11:48:10Z"],["dc.date.available","2017-09-07T11:48:10Z"],["dc.date.issued","2008"],["dc.description.abstract","We introduce far-field fluorescence nanoscopy with ordinary fluorophores based on switching the majority of them to a metastable dark state, such as the triplet, and calculating the position of those left or those that spontaneously returned to the ground state. Continuous widefield illumination by a single laser and a continuously operating camera yielded dual-color images of rhodamine-and fluorescent protein-labeled (living) samples, proving a simple yet powerful super-resolution approach."],["dc.identifier.doi","10.1038/nmeth.1257"],["dc.identifier.gro","3143218"],["dc.identifier.isi","000260532500012"],["dc.identifier.pmid","18794861"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/708"],["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","1548-7091"],["dc.title","Fluorescence nanoscopy by ground-state depletion and single-molecule return"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.subtype","original"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","269"],["dc.bibliographiccitation.issue","3"],["dc.bibliographiccitation.journal","Microscopy research and technique"],["dc.bibliographiccitation.lastpage","280"],["dc.bibliographiccitation.volume","70"],["dc.contributor.author","Schwentker, Miriam A."],["dc.contributor.author","Bock, Hannes"],["dc.contributor.author","Hofmann, Michael"],["dc.contributor.author","Jakobs, Stefan"],["dc.contributor.author","Bewersdorf, Jörg"],["dc.contributor.author","Eggeling, Christian"],["dc.contributor.author","Hell, Stefan W."],["dc.date.accessioned","2017-09-07T11:49:51Z"],["dc.date.available","2017-09-07T11:49:51Z"],["dc.date.issued","2007"],["dc.description.abstract","Subdiffraction fluorescence imaging is presented in a parallelized wide-field arrangement exploiting the principle of reversible saturable/switchable optical transitions (RESOLFT). The diffraction barrier is overcome by photoswitching ensembles of the label protein asFP595 between a nonfluorescent off- and a fluorescent on-state. Relying on ultralow continuous-wave intensities, reversible protein switching facilitates parallelized fast image acquisition. The RESOLFT principle is implemented by illuminating with intensity distributions featuring zero intensity lines that are further apart than the conventional Abbe resolution limit. The subdiffraction resolution is verified by recording live Escherichia coli bacteria labeled with asFP595. The obtained resolution of 50 nm (approximate to lambda/12) is limited only by the spectroscopic properties of the proteins and the imperfections of the optical implementation, but not on principle grounds."],["dc.identifier.doi","10.1002/jemt.20443"],["dc.identifier.gro","3143533"],["dc.identifier.isi","000244761800012"],["dc.identifier.pmid","17262791"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/1058"],["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","1059-910X"],["dc.title","Wide-field subdiffraction RESOLFT microscopy using fluorescent protein photoswitching"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.subtype","original"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","400"],["dc.bibliographiccitation.issue","4"],["dc.bibliographiccitation.journal","Spine"],["dc.bibliographiccitation.lastpage","407"],["dc.bibliographiccitation.volume","34"],["dc.contributor.author","Kantelhardt, Sven R."],["dc.contributor.author","Bock, H."],["dc.contributor.author","Larsen, Jörg"],["dc.contributor.author","Bockermann, Volker"],["dc.contributor.author","Schillinger, Wolfgang"],["dc.contributor.author","Rohde, Veit"],["dc.contributor.author","Giese, Alf"],["dc.date.accessioned","2018-11-07T08:32:44Z"],["dc.date.available","2018-11-07T08:32:44Z"],["dc.date.issued","2009"],["dc.description.abstract","Study Design. Experimental and intraoperative evaluation of the efficiency of a novel technique. Objective. To determine the accuracy of pedicle screw hole placements before screw implantation in the lumbar spine. Summary of Background Data. Deviations from planned trajectories occur in a significant number of screw placements in posterior lumbar fixation. Several techniques have been proposed to minimize this complication, although none has gained general acceptance. This may be due to costs associated with their implementation or considerably extended operating times required by some techniques. Methods. Pedicle screw holes were placed in 24 pedicles of 2 postmortem human lumbar spine specimens. Sixteen optimal trajectories were placed and 8 intentional cortical breaches. Each pedicular drill hole was examined using a 360 ultrasound transducer and CT scanning. The ultrasonographic images were reviewed by 3 independent investigators who were blinded to the CT findings. In addition, 20 screw holes were placed intraoperatively in 3 patients, and equally assessed by intraoperative intraosseous ultrasonography and postoperative CT scanning. Results. Ultrasonographic images of pedicle screw holes in postmortem human spine specimen were correctly interpreted in 99% of cases. No cortical breech was missed, i.e., no false-negatives occurred. Intraoperative findings closely matched the experimental data. None of the intraoperative ultrasound scans demonstrated a cortical breach, a finding confirmed by postoperative CT. The intraoperative time required for the ultrasonographic analysis of each pedicle was about 1 minute and the interpretation of the resulting images was judged intuitive by the evaluating neurosurgeons. Conclusion. Intraosseous ultrasound is a highly reliable technique for the intraoperative assessment of pedicle screw holes before pedicle screw placement. Additional expenses with respect to procedure time and manpower are minimal."],["dc.identifier.doi","10.1097/BRS.0b013e31819286ca"],["dc.identifier.isi","000263517800016"],["dc.identifier.pmid","19214101"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/17410"],["dc.language.iso","en"],["dc.notes.status","final"],["dc.notes.submitter","Najko"],["dc.relation.issn","0362-2436"],["dc.title","Intraosseous Ultrasound in the Placement of Pedicle Screws in the Lumbar Spine"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","3285"],["dc.bibliographiccitation.issue","9"],["dc.bibliographiccitation.journal","Biophysical Journal"],["dc.bibliographiccitation.lastpage","3290"],["dc.bibliographiccitation.volume","93"],["dc.contributor.author","Egner, Alexander"],["dc.contributor.author","Geisler, Claudia"],["dc.contributor.author","von Middendorff, Claas"],["dc.contributor.author","Bock, Hannes"],["dc.contributor.author","Wenzel, Dirk"],["dc.contributor.author","Medda, Rebecca"],["dc.contributor.author","Andresen, Martin"],["dc.contributor.author","Stiel, Andre C."],["dc.contributor.author","Jakobs, Stefan"],["dc.contributor.author","Eggeling, Christian"],["dc.contributor.author","Schoenle, Andreas"],["dc.contributor.author","Hell, Stefan"],["dc.date.accessioned","2017-09-07T11:49:23Z"],["dc.date.available","2017-09-07T11:49:23Z"],["dc.date.issued","2007"],["dc.description.abstract","We demonstrate nanoscale resolution in far-field fluorescence microscopy using reversible photoswitching and localization of individual fluorophores at comparatively fast recording speeds and from the interior of intact cells. These advancements have become possible by asynchronously recording the photon bursts of individual molecular switching cycles. We present images from the microtubular network of an intact mammalian cell with a resolution of 40 nm."],["dc.identifier.doi","10.1529/biophysj.107.112201"],["dc.identifier.gro","3143415"],["dc.identifier.isi","000250199300033"],["dc.identifier.pmid","17660318"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/927"],["dc.notes.intern","WoS Import 2017-03-10"],["dc.notes.status","final"],["dc.notes.submitter","PUB_WoS_Import"],["dc.relation.issn","0006-3495"],["dc.title","Fluorescence nanoscopy in whole cells by asynchronous localization of photoswitching emitters"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.subtype","original"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","161"],["dc.bibliographiccitation.issue","2"],["dc.bibliographiccitation.journal","Applied Physics B Lasers and Optics"],["dc.bibliographiccitation.lastpage","165"],["dc.bibliographiccitation.volume","88"],["dc.contributor.author","Bock, H."],["dc.contributor.author","Geisler, C."],["dc.contributor.author","Wurm, C. A."],["dc.contributor.author","von Middendorff, C."],["dc.contributor.author","Jakobs, S."],["dc.contributor.author","Schönle, A."],["dc.contributor.author","Egner, A."],["dc.contributor.author","Hell, S. W."],["dc.contributor.author","Eggeling, C."],["dc.date.accessioned","2017-09-07T11:49:27Z"],["dc.date.available","2017-09-07T11:49:27Z"],["dc.date.issued","2007"],["dc.description.abstract","We demonstrate two-color far-field fluorescence microscopy with nanoscale spatial resolution based on the photoswitching of individual fluorescent markers. By enabling, recording, and disabling the emission of the reversibly switchable fluorescent protein rsFastLime and of the organic fluorophore cyanine5, we recorded two-color nanoscale images inside whole cells. The position of individual emitters was determined with a typical accuracy of 20 nm, which largely constitutes the lateral resolution of the system. Photoswitching in two-color colocalization experiments represents a major step towards the application of far-field fluorescence nanoscopy to the study of (biological) samples on the macromolecular level."],["dc.identifier.doi","10.1007/s00340-007-2729-0"],["dc.identifier.gro","3143472"],["dc.identifier.isi","000248054900001"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/989"],["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","0946-2171"],["dc.title","Two-color far-field fluorescence nanoscopy based on photoswitchable emitters"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.subtype","original"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","223"],["dc.bibliographiccitation.issue","2"],["dc.bibliographiccitation.journal","Applied Physics A: Materials Science & Processing"],["dc.bibliographiccitation.lastpage","226"],["dc.bibliographiccitation.volume","88"],["dc.contributor.author","Geisler, Claudia"],["dc.contributor.author","Schönle, Andreas"],["dc.contributor.author","Middendorff, Claas von"],["dc.contributor.author","Bock, Hannes"],["dc.contributor.author","Eggeling, Christian"],["dc.contributor.author","Egner, Alexander"],["dc.contributor.author","Hell, Stefan"],["dc.date.accessioned","2017-09-07T11:49:26Z"],["dc.date.available","2017-09-07T11:49:26Z"],["dc.date.issued","2007"],["dc.description.abstract","We demonstrate nanoscale resolution in far-field optical microscopy based on photo-switching of molecules. By enabling, recording and disabling fluorescence from individual labels sequentially, the detection volume is reduced to the size of a single molecule and the diffraction limit is broken. Images of nanostructures milled into a coverslip and tagged by fluorescent proteins could be recorded at 50 nm resolution. Due to the fast and asynchronous image acquisition protocol used in these experiments, we were able to reduce acquisition times to similar to 2.5 min, which is two orders of magnitude lower than in previous implementations."],["dc.identifier.doi","10.1007/s00339-007-4144-0"],["dc.identifier.gro","3143454"],["dc.identifier.isi","000247255800001"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/970"],["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","0947-8396"],["dc.title","Resolution of λ /10 in fluorescence microscopy using fast single molecule photo-switching"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.subtype","original"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","1003"],["dc.bibliographiccitation.issue","12"],["dc.bibliographiccitation.journal","Microscopy research and technique"],["dc.bibliographiccitation.lastpage","1009"],["dc.bibliographiccitation.volume","70"],["dc.contributor.author","Eggeling, C."],["dc.contributor.author","Hilbert, M."],["dc.contributor.author","Bock, H."],["dc.contributor.author","Ringemann, C."],["dc.contributor.author","Hofmann, M."],["dc.contributor.author","Stiel, A. C."],["dc.contributor.author","Andresen, M."],["dc.contributor.author","Jakobs, S."],["dc.contributor.author","Egner, A."],["dc.contributor.author","Schönle, A."],["dc.contributor.author","Hell, S. W."],["dc.date.accessioned","2017-09-07T11:49:23Z"],["dc.date.available","2017-09-07T11:49:23Z"],["dc.date.issued","2007"],["dc.description.abstract","We demonstrate that photoswitchable markers enable fluorescence fluctuation spectroscopy at high molecular concentration. Reversible photoswitching allows precise control of the density of fluorescing entities, because the equilibrium between the fluorescent ON- and the dark OFF-state can be shifted through optical irradiation at a specific wavelength. Depending on the irradiation intensity, the concentration of the ON-state markers can be up to 1,000 times lower than the actual concentration of the labeled molecular entity. Photoswitching expands the range of single-molecule detection based experiments such as fluorescence fluctuation spectroscopy to large entity concentrations in the micromolar range."],["dc.identifier.doi","10.1002/jemt.20505"],["dc.identifier.gro","3143405"],["dc.identifier.isi","000251868200001"],["dc.identifier.pmid","17661359"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/916"],["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","1059-910X"],["dc.title","Reversible photoswitching enables single-molecule fluorescence fluctuation Spectroscopy at high molecular concentration"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.subtype","original"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","2989"],["dc.bibliographiccitation.issue","6"],["dc.bibliographiccitation.journal","Biophysical Journal"],["dc.bibliographiccitation.lastpage","2997"],["dc.bibliographiccitation.volume","95"],["dc.contributor.author","Stiel, Andre C."],["dc.contributor.author","Andresen, Martin"],["dc.contributor.author","Bock, Hannes"],["dc.contributor.author","Hilbert, Michael"],["dc.contributor.author","Schilde, Jessica"],["dc.contributor.author","Schönle, Andreas"],["dc.contributor.author","Eggeling, Christian"],["dc.contributor.author","Egner, Alexander"],["dc.contributor.author","Hell, Stefan"],["dc.contributor.author","Jakobs, Stefan"],["dc.date.accessioned","2017-09-07T11:48:12Z"],["dc.date.available","2017-09-07T11:48:12Z"],["dc.date.issued","2008"],["dc.description.abstract","Reversibly switchable fluorescent proteins (RSFPs) are GFP-like proteins that may be repeatedly switched by irradiation with light from a fluorescent to a nonfluorescent state, and vice versa. They can be utilized as genetically encodable probes and bear large potential for a wide array of applications, in particular for new protein tracking schemes and subdiffraction resolution microscopy. However, the currently described monomeric RSFPs emit only blue-green or green fluorescence; the spectral window for their use is thus rather limited. Using a semirational engineering approach based on the crystal structure of the monomeric nonswitchable red fluorescent protein mCherry, we generated rsCherry and rsCherryRev. These two novel red fluorescent RSFPs exhibit fluorescence emission maxima at similar to 610 nm. They display antagonistic switching modes, i.e., in rsCherry irradiation with yellow light induces the off-to-on transition and blue light the on-to-off transition, whereas in rsCherryRev the effects of the switching wavelengths are reversed. We demonstrate time-lapse live-cell subdiffraction microscopy by imaging rsCherryRev targeted to the endoplasmic reticulum utilizing the switching and localization of single molecules."],["dc.identifier.doi","10.1529/biophysj.108.130146"],["dc.identifier.gro","3143236"],["dc.identifier.isi","000258826900034"],["dc.identifier.pmid","18658221"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/728"],["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","0006-3495"],["dc.title","Generation of monomeric reversibly switchable red fluorescent proteins for far-field fluorescence nanoscopy"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.subtype","original"],["dspace.entity.type","Publication"]]