151
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Simonotto JD, Kaiser M, Whittington MA, Cunningham MO. Network properties of control and epileptic human slice recordings. BMC Neurosci 2011. [PMCID: PMC3240519 DOI: 10.1186/1471-2202-12-s1-p51] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/05/2022] Open
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152
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Kaiser M. A tutorial in connectome analysis: Topological and spatial features of brain networks. Neuroimage 2011; 57:892-907. [PMID: 21605688 DOI: 10.1016/j.neuroimage.2011.05.025] [Citation(s) in RCA: 270] [Impact Index Per Article: 20.8] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2011] [Revised: 05/06/2011] [Accepted: 05/07/2011] [Indexed: 01/07/2023] Open
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153
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Sikorski C, Riedel C, Kaiser M, Pantenburg B, Glaesmer H, Schomerus G, Brähler E, Riedel-Heller SG. Attitudes towards and Perception of Overweight and Obesity in the Public Opinion: a systematic review. DAS GESUNDHEITSWESEN 2011. [DOI: 10.1055/s-0031-1283632] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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154
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Echtermeyer C, Han CE, Rotarska-Jagiela A, Mohr H, Uhlhaas PJ, Kaiser M. Integrating temporal and spatial scales: human structural network motifs across age and region of interest size. Front Neuroinform 2011; 5:10. [PMID: 21811454 PMCID: PMC3143730 DOI: 10.3389/fninf.2011.00010] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2011] [Accepted: 07/02/2011] [Indexed: 11/17/2022] Open
Abstract
Human brain networks can be characterized at different temporal or spatial scales given by the age of the subject or the spatial resolution of the neuroimaging method. Integration of data across scales can only be successful if the combined networks show a similar architecture. One way to compare networks is to look at spatial features, based on fiber length, and topological features of individual nodes where outlier nodes form single node motifs whose frequency yields a fingerprint of the network. Here, we observe how characteristic single node motifs change over age (12–23 years) and network size (414, 813, and 1615 nodes) for diffusion tensor imaging structural connectivity in healthy human subjects. First, we find the number and diversity of motifs in a network to be strongly correlated. Second, comparing different scales, the number and diversity of motifs varied across the temporal (subject age) and spatial (network resolution) scale: certain motifs might only occur at one spatial scale or for a certain age range. Third, regions of interest which show one motif at a lower resolution may show a range of motifs at a higher resolution which may or may not include the original motif at the lower resolution. Therefore, both the type and localization of motifs differ for different spatial resolutions. Our results also indicate that spatial resolution has a higher effect on topological measures whereas spatial measures, based on fiber lengths, remain more comparable between resolutions. Therefore, spatial resolution is crucial when comparing characteristic node fingerprints given by topological and spatial network features. As node motifs are based on topological and spatial properties of brain connectivity networks, these conclusions are also relevant to other studies using connectome analysis.
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155
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Kaiser M, Kühnl A, Reins J, Fischer S, Ortiz-Tanchez J, Schlee C, Mochmann LH, Heesch S, Benlasfer O, Hofmann WK, Thiel E, Baldus CD. Antileukemic activity of the HSP70 inhibitor pifithrin-μ in acute leukemia. Blood Cancer J 2011; 1:e28. [PMID: 22829184 PMCID: PMC3255249 DOI: 10.1038/bcj.2011.28] [Citation(s) in RCA: 56] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2011] [Revised: 04/26/2011] [Accepted: 05/12/2011] [Indexed: 01/14/2023] Open
Abstract
Heat shock protein (HSP) 70 is aberrantly expressed in different malignancies and has emerged as a promising new target for anticancer therapy. Here, we analyzed the in vitro antileukemic effects of pifithrin-μ (PFT-μ), an inhibitor of inducible HSP70, in acute myeloid leukemia (AML) and acute lymphoblastic leukemia (ALL) cell lines, as well as in primary AML blasts. PFT-μ significantly inhibited cell viability at low micromolar concentrations in all cell lines tested, with IC50 values ranging from 2.5 to 12.7 μ, and was highly active in primary AML blasts with a median IC50 of 8.9 μ (range 5.7–37.2). Importantly, higher IC50 values were seen in normal hematopoietic cells. In AML and ALL, PFT-μ induced apoptosis and cell cycle arrest in a dose-dependent fashion. PFT-μ also led to an increase of the active form of caspase-3 and reduced the intracellular concentrations of AKT and ERK1/2 in NALM-6 cells. Moreover, PFT-μ enhanced cytotoxicity of cytarabine, 17-(allylamino)-17-desmethoxygeldanamycin, suberoylanilide hydroxamic acid, and sorafenib in NALM-6, TOM-1 and KG-1a cells. This is the first study demonstrating significant antileukemic effects of the HSP70 inhibitor PFT-μ, alone and in combination with different antineoplastic drugs in both AML and ALL. Our results suggest a potential therapeutic role for PFT-μ in acute leukemias.
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156
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Münzenberg C, Paulsen F, Kalinski T, Kaiser M, Nass N, Duncker G, Sel S. Einseitiges Papillenödem und kontralateraler Visusverlust. Ophthalmologe 2011; 108:170-3. [DOI: 10.1007/s00347-010-2274-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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157
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Echtermeyer C, da Fontoura Costa L, Rodrigues FA, Kaiser M. Automatic network fingerprinting through single-node motifs. PLoS One 2011; 6:e15765. [PMID: 21297963 PMCID: PMC3031529 DOI: 10.1371/journal.pone.0015765] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2010] [Accepted: 12/02/2010] [Indexed: 11/19/2022] Open
Abstract
Complex networks have been characterised by their specific connectivity patterns (network motifs), but their building blocks can also be identified and described by node-motifs—a combination of local network features. One technique to identify single node-motifs has been presented by Costa et al. (L. D. F. Costa, F. A. Rodrigues, C. C. Hilgetag, and M. Kaiser, Europhys. Lett., 87, 1, 2009). Here, we first suggest improvements to the method including how its parameters can be determined automatically. Such automatic routines make high-throughput studies of many networks feasible. Second, the new routines are validated in different network-series. Third, we provide an example of how the method can be used to analyse network time-series. In conclusion, we provide a robust method for systematically discovering and classifying characteristic nodes of a network. In contrast to classical motif analysis, our approach can identify individual components (here: nodes) that are specific to a network. Such special nodes, as hubs before, might be found to play critical roles in real-world networks.
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158
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Kaiser M, Varier S. Evolution and development of brain networks: from Caenorhabditis elegans to Homo sapiens. NETWORK (BRISTOL, ENGLAND) 2011; 22:143-147. [PMID: 22149674 DOI: 10.3109/0954898x.2011.638968] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
Neural networks show a progressive increase in complexity during the time course of evolution. From diffuse nerve nets in Cnidaria to modular, hierarchical systems in macaque and humans, there is a gradual shift from simple processes involving a limited amount of tasks and modalities to complex functional and behavioral processing integrating different kinds of information from highly specialized tissue. However, studies in a range of species suggest that fundamental similarities, in spatial and topological features as well as in developmental mechanisms for network formation, are retained across evolution. 'Small-world' topology and highly connected regions (hubs) are prevalent across the evolutionary scale, ensuring efficient processing and resilience to internal (e.g. lesions) and external (e.g. environment) changes. Furthermore, in most species, even the establishment of hubs, long-range connections linking distant components, and a modular organization, relies on similar mechanisms. In conclusion, evolutionary divergence leads to greater complexity while following essential developmental constraints.
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159
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Tantangmo F, Lenta BN, Boyom FF, Ngouela S, Kaiser M, Tsamo E, Weniger B, Rosenthal PJ, Vonthron-Sénécheau C. Antiprotozoal activities of some constituents of Markhamia tomentosa (Bignoniaceae). ANNALS OF TROPICAL MEDICINE AND PARASITOLOGY 2010; 104:391-8. [PMID: 20819307 DOI: 10.1179/136485910x12743554760180] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
Phytochemical investigation of an ethyl-acetate extract of the stem bark of Markhamia tomentosa (Bignoniaceae), which had good antimalarial activity in vitro, resulted in the isolation of eight known compounds: 2-acetylnaphtho[2,3-b]furan-4,9-dione (1), 2-acetyl-6-methoxynaphtho[2,3-b]furan-4,9-dione (2), oleanolic acid (3), pomolic acid (4), 3-acetylpomolic acid (5), tormentic acid (6), beta-sitosterol (7) and beta-sitosterol-3-O-beta-D-glucopyranoside (8). The structures of these compounds were established by spectroscopic methods. Each of compounds 1, 2, 4 and 5 was evaluated in vitro for its antiprotozoal activities against the ring stages of two chloroquine-resistant strains of Plasmodium falciparum (K1 and W2), the amastigotes of Leishmania donovani, and the bloodstream trypomastigotes of Trypanosoma brucei rhodesiense (the species responsible for human malaria, visceral leishmaniasis and African trypanosomiasis, respectively). Although compounds 1 and 2 exhibited potent antiprotozoal activities, they also showed high toxicity against a mammalian (L-6) cell line.
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160
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Claus M, Hänselmann K, Bussas U, Zeissig S, Dik N, Kaiser M, Blettner M, Klug S. Soziale Determinanten der Nichtteilnahme an der MARZY-Studie. DAS GESUNDHEITSWESEN 2010. [DOI: 10.1055/s-0030-1266630] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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161
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Hänselmann K, Bussas U, Ressing M, Kaiser M, Zeissig S, Dik N, Blettner M, Klug S. Gründe für die Nichtteilnahme an der Krebsvorsorge in Deutschland. DAS GESUNDHEITSWESEN 2010. [DOI: 10.1055/s-0030-1266176] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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162
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Kaiser M, Hilgetag CC, Kötter R. Hierarchy and dynamics of neural networks. Front Neuroinform 2010; 4. [PMID: 20844605 PMCID: PMC2938979 DOI: 10.3389/fninf.2010.00112] [Citation(s) in RCA: 50] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2010] [Accepted: 08/05/2010] [Indexed: 12/14/2022] Open
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163
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Kaiser M, Hilgetag CC. Optimal hierarchical modular topologies for producing limited sustained activation of neural networks. Front Neuroinform 2010; 4:8. [PMID: 20514144 PMCID: PMC2876872 DOI: 10.3389/fninf.2010.00008] [Citation(s) in RCA: 62] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2009] [Accepted: 03/14/2010] [Indexed: 01/05/2023] Open
Abstract
An essential requirement for the representation of functional patterns in complex neural networks, such as the mammalian cerebral cortex, is the existence of stable regimes of network activation, typically arising from a limited parameter range. In this range of limited sustained activity (LSA), the activity of neural populations in the network persists between the extremes of either quickly dying out or activating the whole network. Hierarchical modular networks were previously found to show a wider parameter range for LSA than random or small-world networks not possessing hierarchical organization or multiple modules. Here we explored how variation in the number of hierarchical levels and modules per level influenced network dynamics and occurrence of LSA. We tested hierarchical configurations of different network sizes, approximating the large-scale networks linking cortical columns in one hemisphere of the rat, cat, or macaque monkey brain. Scaling of the network size affected the number of hierarchical levels and modules in the optimal networks, also depending on whether global edge density or the numbers of connections per node were kept constant. For constant edge density, only few network configurations, possessing an intermediate number of levels and a large number of modules, led to a large range of LSA independent of brain size. For a constant number of node connections, there was a trend for optimal configurations in larger-size networks to possess a larger number of hierarchical levels or more modules. These results may help to explain the trend to greater network complexity apparent in larger brains and may indicate that this complexity is required for maintaining stable levels of neural activation.
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164
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Anders J, Byrne HJ, Reichenbach J, Kaiser M, Schmelzer M, Wagner T, Roth S. Transient Spectroscopy of Donor-Acceptor Complexes. ACTA ACUST UNITED AC 2010. [DOI: 10.1002/bbpc.19930970342] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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165
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Kaiser M, Bauer J, Rämsch C, Uter W, Sieber C. Was ist neu beim Mini Nutritional Assessment (MNA®)? AKTUELLE ERNAHRUNGSMEDIZIN 2010. [DOI: 10.1055/s-0030-1248428] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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166
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Butler S, Tanaka J, Kaiser M, Le Grand R. Mixed emotions: Holistic and analytic perception of facial expressions. J Vis 2010. [DOI: 10.1167/9.8.496] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
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167
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Le Grand R, Bukach C, Kaiser M, Bub D, Tanaka J. Preservation and impairment of featural and configural processing for faces as a result of prosopagnosia. J Vis 2010. [DOI: 10.1167/5.8.636] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
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168
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Kaiser M, Lappe M. Perisaccadic compression of space orthogonal to saccade direction. J Vis 2010. [DOI: 10.1167/2.7.173] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
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169
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Kaiser M, Bray D, Benlhassan-Chahour K, Bissuel F, Anais PH, Rozenbaum W, Ellerbrok H. Detection and differentiation of Dengue infections with highly sensitive real-time PCRs. Int J Infect Dis 2010. [DOI: 10.1016/j.ijid.2010.02.422] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022] Open
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170
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Kaiser M, Ulrich M, Löwa A, Piechotta G, Wörl R, Ellerbrok H. Combination of PCR and electrical microarray allows rapid and sensitive multiplex detection of mosquito-transmitted pathogens. Int J Infect Dis 2010. [DOI: 10.1016/j.ijid.2010.02.421] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022] Open
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171
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Fischer H, Selig M, Vagner J, Vogel B, Hempel E, Kaiser M, Brhel K, Hinz A, Felden A, Schäf A, Gumb L, Ullrich U, Grünhagen A, Voges U, Kühnapfel H, Çakmak H, Maass H, Becker H, Breitwieser H, Mikut R, Oberle R, Eppler W, Schlossmacher P, Pfleging W, Kaiser WA, Schüler S, Cichon R, Cornelius M, Kappert U, Schurr MO, Buess G, Falk V. The medical engineering program of Forschungszentrum Karlsruhe. MINIM INVASIV THER 2010; 9:255-67. [DOI: 10.1080/13645700009169656] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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172
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Riente RR, Souza VP, Carvalho SA, Kaiser M, Brun R, da Silva EF. Leishmanicidal activity of new megazol derivatives. Med Chem 2009; 5:392-7. [PMID: 19689398 DOI: 10.2174/157340609788681467] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
A series of thirteen new megazol derivatives, designed exploring the molecular hybridization approach between megazol (3) and heterocombretastatins (2), was synthesized. These new compounds were tested for in vitro antiparasitic activity upon axenic amastigotes of Leishmania donovani. Biological results led us to identify a new potent megazol derivative (4g), which presents an IC(50) = 0.081microg/mL, more active tham the reference drug miltefosine (IC(50) = 0.131microg/mL).
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173
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Adlhoch C, Kaiser M, Pauli G, Koch J, Meisel H. Indigenous hepatitis E virus infection of a plasma donor in Germany. Vox Sang 2009; 97:303-8. [DOI: 10.1111/j.1423-0410.2009.01211.x] [Citation(s) in RCA: 40] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
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174
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Prinz K, Rapp M, Kraus R, Wessel L, Kaiser M. Dislozierte Klavikulafrakturen im Kindes- und Jugendalter: Wer profitiert von einer Operation? ZEITSCHRIFT FUR ORTHOPADIE UND UNFALLCHIRURGIE 2009; 148:60-5. [DOI: 10.1055/s-0029-1186155] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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175
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Kaiser M. Feedback loops and oscillations in modular hierarchical brain networks: the topological origin of brain rhythms. BMC Neurosci 2009. [DOI: 10.1186/1471-2202-10-s1-p281] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
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176
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Simonotto JD, Eglen SJ, Kaiser M, Adams C, Sernagor E. Analysis of spontaneous activity patterns in developing retina: algorithms and results. BMC Neurosci 2009. [DOI: 10.1186/1471-2202-10-s1-p66] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
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177
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Kaiser M, Hilgetag CC, van Ooyen A. Random axon outgrowth and synaptic competition generate realistic connection lengths and filling fractions. BMC Neurosci 2009. [DOI: 10.1186/1471-2202-10-s1-p58] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
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178
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Marcelino J, Kaiser M. Reducing in fl uenza spreading over the airline network. PLOS CURRENTS 2009; 1:RRN1005. [PMID: 20020673 PMCID: PMC2762335 DOI: 10.1371/currents.rrn1005] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Accepted: 08/21/2009] [Indexed: 11/18/2022]
Abstract
Disease spreading through human travel networks has been a topic of great interest in recent years, such as with swine in fl uenza or SARS pandemics. Most studies have proposed removing highly connected nodes (hubs) to control spreading. Here, we test alternative strategies using edge removal ( fl ight cancellation) for spreading over the airline network. Flight cancellation was more ef fi cient than shutting down whole airports: spreading took 81% longer if solely selected fl ights were removed, compared to a 52% reduction when entire airports were shutdown, affecting the same number of fl ights.
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179
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Heinrich B, Klier M, Kaiser M. A Procedure to Develop Metrics for Currency and its Application in CRM. ACM JOURNAL OF DATA AND INFORMATION QUALITY 2009. [DOI: 10.1145/1515693.1515697] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Abstract
Due to the importance of using up-to-date data in information systems, this article analyzes how the data-quality dimension currency can be quantified. Based on several requirements (e.g., normalization and interpretability) and a literature review, we design a procedure to develop probability-based metrics for currency which can be adjusted to the specific characteristics of data attribute values. We evaluate the presented procedure with regard to the requirements and illustrate the applicability as well as its practical benefit. In cooperation with a major German mobile services provider, the procedure was applied in the field of campaign management in order to improve both success rates and profits.
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180
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Seyfert U, Kaiser M, Wenzel E. Aspekte zur Hämokompatibilität im Rahmen einer Thrombozytapherese mit dem Blutzellseparator Fresenius AS 104. Transfus Med Hemother 2009. [DOI: 10.1159/000223226] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022] Open
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181
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Kaiser M, Hilgetag CC, van Ooyen A. A Simple Rule for Axon Outgrowth and Synaptic Competition Generates Realistic Connection Lengths and Filling Fractions. Cereb Cortex 2009; 19:3001-10. [DOI: 10.1093/cercor/bhp071] [Citation(s) in RCA: 81] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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182
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Schulze-Rath R, Husmann G, Kaiser M, Kolpatzik K, Münster E, Nübling M, Zeeb H. Einsatz und Bewertung einer Entscheidungshilfe für Patientinnen mit Brustkrebs im T1-Stadium. Geburtshilfe Frauenheilkd 2009. [DOI: 10.1055/s-0029-1185635] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022] Open
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183
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Kaiser M, Reuter HM, Hermanns N, Medding J, Grundner M. Die Beobachtungsstudie LIGHT GERMANY: Ersteinstellung mit Insulin bei Patienten mit Typ 2 Diabetes – Vergleich von Insulindetemir vs. NPH-Insulin. DIABETOL STOFFWECHS 2009. [DOI: 10.1055/s-0029-1222034] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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184
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Reuter HM, Kaiser M, Hermanns N, Wilhelm B, Grundner M. Gewichtsentwicklung und Änderungen der oralen Begleitmedikation nach Initiierung einer Therapie mit Insulindetemir oder NPH-Insulin bei Patienten mit Typ 2 Diabetes: Daten aus LIGHT GERMANY. DIABETOL STOFFWECHS 2009. [DOI: 10.1055/s-0029-1222038] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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185
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Hermanns N, Kaiser M, Reuter HM, Wilhelm B, Grundner M. Therapiezufriedenheit und Lebensqualität von Patienten mit Typ 2 Diabetes nach Einstellung auf Insulin: LIGHT GERMANY. DIABETOL STOFFWECHS 2009. [DOI: 10.1055/s-0029-1222035] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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186
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Henri P, Briand C, Mangeney A, Bale SD, Califano F, Goetz K, Kaiser M. Evidence for wave coupling in type III emissions. ACTA ACUST UNITED AC 2009. [DOI: 10.1029/2008ja013738] [Citation(s) in RCA: 55] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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187
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Liebl A, Prager R, Binz K, Kaiser M, Bergenstal R, Gallwitz B. Comparison of insulin analogue regimens in people with type 2 diabetes mellitus in the PREFER Study: a randomized controlled trial. Diabetes Obes Metab 2009; 11:45-52. [PMID: 18643839 DOI: 10.1111/j.1463-1326.2008.00915.x] [Citation(s) in RCA: 121] [Impact Index Per Article: 8.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
AIMS Insulin analogues are widely used but few data exist comparing different analogue regimens. We compared two such regimens in type 2 diabetes mellitus (T2DM) uncontrolled by oral antidiabetic agents (OADs) with or without basal insulin. METHODS In a 26-week multinational, multicentre, randomized treat-to-target trial, OADs were discontinued and subjects randomized to analogue basal-bolus therapy (insulin detemir once daily and insulin aspart mealtimes) or biphasic insulin aspart 30 (30% rapid-acting insulin aspart), twice daily. Insulin was titrated to targets for fasting, predinner and postprandial plasma glucose (PG), as appropriate. RESULTS Of 719 subjects, 92% completed the study; 58% achieved haemoglobin fraction A(1c) (HbA(1c)) < or =7.0%, with reductions of 1.56% (to 6.96%) with basal-bolus therapy and 1.23% (to 7.17%) with biphasic insulin aspart. Reduction with basal-bolus therapy was superior in the overall population by 0.23% (p = 0.0052), with no difference between regimens in insulin-naive patients. Major hypoglycaemia occurred in five basal-bolus patients (0.9%) and in no patients with biphasic insulin aspart. Incidence of minor hypoglycaemia was similar in both groups. All insulin doses increased during titration, with increase in lunchtime insulin aspart dose and equal distribution of breakfast and dinner biphasic insulin aspart doses. Insulin detemir remained once daily in 87% of patients. CONCLUSIONS Modern insulin analogue regimens, adjusted to PG targets, enable a majority of people with T2DM to reach HbA(1c)< or =7.0% after failure of OADs and OAD-basal insulin therapy. Insulin-treated patients may benefit more from transfer to analogue basal-bolus therapy, while insulin-naive individuals benefit equally well from the more convenient biphasic analogue regimen.
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Kaiser M. Simulating Neural Network Development: Competition in Space and Time Influences the Formation of Neural Circuits. Front Neuroinform 2009. [DOI: 10.3389/conf.neuro.11.2009.08.048] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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189
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Roopun AK, Kramer MA, Carracedo LM, Kaiser M, Davies CH, Traub RD, Kopell NJ, Whittington MA. Temporal Interactions between Cortical Rhythms. Front Neurosci 2008; 2:145-54. [PMID: 19225587 PMCID: PMC2622758 DOI: 10.3389/neuro.01.034.2008] [Citation(s) in RCA: 140] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2008] [Accepted: 11/09/2008] [Indexed: 11/15/2022] Open
Abstract
Multiple local neuronal circuits support different, discrete frequencies of network rhythm in neocortex. Relationships between different frequencies correspond to mechanisms designed to minimise interference, couple activity via stable phase interactions, and control the amplitude of one frequency relative to the phase of another. These mechanisms are proposed to form a framework for spectral information processing. Individual local circuits can also transform their frequency through changes in intrinsic neuronal properties and interactions with other oscillating microcircuits. Here we discuss a frequency transformation in which activity in two co-active local circuits may combine sequentially to generate a third frequency whose period is the concatenation sum of the original two. With such an interaction, the intrinsic periodicity in each component local circuit is preserved – alternate, single periods of each original rhythm form one period of a new frequency – suggesting a robust mechanism for combining information processed on multiple concurrent spatiotemporal scales.
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190
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Bressler C, Milne C, Pham VT, Elnahhas A, van der Veen RM, Gawelda W, Johnson S, Beaud P, Grolimund D, Kaiser M, Borca CN, Ingold G, Abela R, Chergui M. Femtosecond XANES study of the light-induced spin crossover dynamics in an iron(II) complex. Science 2008; 323:489-92. [PMID: 19074309 DOI: 10.1126/science.1165733] [Citation(s) in RCA: 453] [Impact Index Per Article: 28.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/02/2022]
Abstract
X-ray absorption spectroscopy is a powerful probe of molecular structure, but it has previously been too slow to track the earliest dynamics after photoexcitation. We investigated the ultrafast formation of the lowest quintet state of aqueous iron(II) tris(bipyridine) upon excitation of the singlet metal-to-ligand-charge-transfer (1MLCT) state by femtosecond optical pump/x-ray probe techniques based on x-ray absorption near-edge structure (XANES). By recording the intensity of a characteristic XANES feature as a function of laser pump/x-ray probe time delay, we find that the quintet state is populated in about 150 femtoseconds. The quintet state is further evidenced by its full XANES spectrum recorded at a 300-femtosecond time delay. These results resolve a long-standing issue about the population mechanism of quintet states in iron(II)-based complexes, which we identify as a simple 1MLCT-->3MLCT-->5T cascade from the initially excited state. The time scale of the 3MLCT-->5T relaxation corresponds to the period of the iron-nitrogen stretch vibration.
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191
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Kraus R, Kaiser M. Growth disturbances of the distal tibia after physeal separation--what do we know, what do we believe we know? A review of current literature. Eur J Pediatr Surg 2008; 18:295-9. [PMID: 18825617 DOI: 10.1055/s-2008-1038957] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Abstract
PURPOSE Although they are the most frequent physeal separations of the lower limb, epiphyseal separations (Salter I and II) of the distal tibia are rare injuries, peaking in adolescence. Generally they are considered lobe benign fractures with a low rate of complications. However, in the literature, concrete statements on the incidence of fracture-associated growth disturbances are infrequent and inconsistent, even contradictory. MATERIALS AND METHODS A review of textbooks, classical references and recent literature was performed to identify the available evidence on distal tibia physeal separations. RESULTS A review of the literature showed that most authors agree that conservative, nonoperative treatment is the preferred treatment. But opinions differ on almost all essential fundamentals of treatment. Neither the potential for growth-associated spontaneous correction of posttraumatic axis deviations nor the tolerable degree of axial deviations are evaluated homogenously. Opinions also vary greatly concerning the frequency of posttraumatic growth disturbances, the influence of the mechanism of injury and the amount of primary axial deviation. The most consistent statement in the literature is that poor results of both closed and open reduction lead to an increasing number of growth disturbances, which may include the assumption that not only trauma but operative procedures, too, can be the reason for restrictive physeal plate disturbances. CONCLUSIONS There are two major deficiencies in most of the reviewed literature. The first is that the numbers of cases reported in each article are low due to the rarity of the injury. The second deficiency is that many studies report "physeal injuries" but do not clearly distinguish physeal separations (Salter I and II) from epiphyseal fractures (Salter III and IV) and transitional fractures, all involving the physeal plate, but in completely different ways with completely different prognoses. A prospective multicenter study is taking place.
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192
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Chergui M, Bressler C, Milne C, Pham V, ElNahhas A, van der Veen R, Johnson S, Beaud P, Grolimund D, Kaiser M, Borca C, Ingold G, Abela R. Picosecond and femtosecond X-ray absorption studies of the photoinduced spin change in Fe complexes. Acta Crystallogr A 2008. [DOI: 10.1107/s0108767308098413] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
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193
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Johnson S, Beaud P, Ingold G, Vorobeva E, Milne C, Krasniqi F, Zijlstra E, Garcia M, Kaiser M, Grolimund D, Abela R. Femtosecond X-ray crystallography of elemental solids: coherent dynamics in bismuth and tellurium. Acta Crystallogr A 2008. [DOI: 10.1107/s0108767308095482] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
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194
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Johnson S, Beaud P, Ingold G, Vorobeva E, Milne C, Krasniqi F, Zijlstra E, Garcia M, Kaiser M, Grolimund D, Abela R. Femtosecond X-ray science at the Swiss Light Source. Acta Crystallogr A 2008. [DOI: 10.1107/s0108767308093732] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
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195
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Jakob C, Sterz J, Liebisch P, Mieth M, Rademacher J, Goerke A, Heider U, Fleissner C, Kaiser M, von Metzler I, Müller C, Sezer O. Incorporation of the bone marker carboxy-terminal telopeptide of type-1 collagen improves prognostic information of the International Staging System in newly diagnosed symptomatic multiple myeloma. Leukemia 2008; 22:1767-72. [PMID: 18580957 DOI: 10.1038/leu.2008.159] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
Abstract
Several prognostic markers, including parameters of tumor burden and cytogenetics, were adopted to identify high-risk patients in multiple myeloma (MM). Recently, the International Staging System (ISS), including beta2-microglobulin (beta2M) and albumin, was introduced for patients with symptomatic MM. As bone disease is a hallmark of MM, we investigated the prognostic impact of the bone resorption marker carboxy-terminal telopeptide of type-1 collagen (ICTP) in combination with ISS, beta2M, albumin, deletion of chromosome 13 and high-dose therapy (HDT) in 100 patients with newly diagnosed symptomatic MM. beta2M alone, albumin alone, ISS, HDT, del(13q14) and ICTP were significant prognostic factors for overall survival (OS). In a multivariate analysis, ICTP was the most powerful prognostic factor (log-rank P<0.001, hazard ratio: ninefold increase). ICTP clearly separated two subgroups with a good and a worse prognosis within each of the three ISS stages (ISS I: P=0.027, ISS II: P=0.022, ISS III: P=0.013). Incorporation of ICTP in a combined ICTP-ISS score significantly (P<0.001) separated four risk groups with a 5-year OS rate of 95, 64, 46 and 22%, [corrected] respectively. These data demonstrate for the first time that the inclusion of the collagen-I degradation product ICTP, as a biomarker of bone resorption, adds to the prognostic value of ISS.
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Johnson SL, Beaud P, Milne CJ, Krasniqi FS, Zijlstra ES, Garcia ME, Kaiser M, Grolimund D, Abela R, Ingold G. Nanoscale depth-resolved coherent femtosecond motion in laser-excited bismuth. PHYSICAL REVIEW LETTERS 2008; 100:155501. [PMID: 18518120 DOI: 10.1103/physrevlett.100.155501] [Citation(s) in RCA: 45] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/04/2007] [Indexed: 05/19/2023]
Abstract
We employ grazing-incidence femtosecond x-ray diffraction to characterize the coherent, femtosecond laser-induced lattice motion of a bismuth crystal as a function of depth from the surface with a temporal resolution of 193+/-8 fs. The data show direct consequences on the lattice motion from carrier diffusion and electron-hole interaction, allowing us to estimate an effective diffusion rate of D=2.3+/-0.3 cm(2)/s for the highly excited carriers and an electron-hole interaction time of 260+/-20 fs.
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197
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Roopun AK, Kramer MA, Carracedo LM, Kaiser M, Davies CH, Traub RD, Kopell NJ, Whittington MA. Period concatenation underlies interactions between gamma and beta rhythms in neocortex. Front Cell Neurosci 2008; 2:1. [PMID: 18946516 PMCID: PMC2525927 DOI: 10.3389/neuro.03.001.2008] [Citation(s) in RCA: 83] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2008] [Accepted: 03/27/2008] [Indexed: 12/02/2022] Open
Abstract
The neocortex generates rhythmic electrical activity over a frequency range covering many decades. Specific cognitive and motor states are associated with oscillations in discrete frequency bands within this range, but it is not known whether interactions and transitions between distinct frequencies are of functional importance. When coexpressed rhythms have frequencies that differ by a factor of two or more interactions can be seen in terms of phase synchronization. Larger frequency differences can result in interactions in the form of nesting of faster frequencies within slower ones by a process of amplitude modulation. It is not known how coexpressed rhythms, whose frequencies differ by less than a factor of two may interact. Here we show that two frequencies (gamma – 40 Hz and beta2 – 25 Hz), coexpressed in superficial and deep cortical laminae with low temporal interaction, can combine to generate a third frequency (beta1 – 15 Hz) showing strong temporal interaction. The process occurs via period concatenation, with basic rhythm-generating microcircuits underlying gamma and beta2 rhythms forming the building blocks of the beta1 rhythm by a process of addition. The mean ratio of adjacent frequency components was a constant – approximately the golden mean – which served to both minimize temporal interactions, and permit multiple transitions, between frequencies. The resulting temporal landscape may provide a framework for multiplexing – parallel information processing on multiple temporal scales.
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198
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Gibson F, Overton P, Smulders T, Schultz S, Eglen S, Ingram C, Panzeri S, Bream P, Sernagor E, Cunningham M, Adams C, Echtermeyer C, Simonotto J, Kaiser M, Swan D, Fletcher M, Lord P. Minimum Information about a Neuroscience Investigation (MINI) Electrophysiology. ACTA ACUST UNITED AC 2008. [DOI: 10.1038/npre.2008.1720.1] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
AbstractThis module represents the formalized opinion of the authors and the CARMEN consortium, which identifies the minimum information required to report the use of electrophysiology in a neuroscience study, for submission to the CARMEN system (www.carmen.org.uk).
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199
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Kaiser M, Wetzel S, Kumar K, Waldmann H. Biology-inspired synthesis of compound libraries. Cell Mol Life Sci 2008; 65:1186-201. [DOI: 10.1007/s00018-007-7492-1] [Citation(s) in RCA: 137] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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200
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Gallwitz B, Lüddeke HJ, Maxeiner S, Grundner M, Kaiser M. Mit oralen Antidiabetika behandelte Patienten mit Typ-2-Diabetes nehmen signifikant an Gewicht ab, wenn bei Einleitung einer Therapie mit Insulindetemir Sulfonylharnstoffe oder Thiazolidindione abgesetzt werden: Ergebnisse von PREDICTIVE™. DIABETOL STOFFWECHS 2008. [DOI: 10.1055/s-2008-1076351] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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