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  • 1
    Electronic Resource
    Electronic Resource
    X-ray Crystallographic Structure of a 7-Aza-nido-undecaborane Derivative: (NB2tBu3H)NB10H12 (1995)
    s.l. : American Chemical Society
    Inorganic chemistry 34 (1995), S. 5925-5926 
    Details
    ISSN: 1520-510X
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/ic00127a034
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  • 2
    Electronic Resource
    Electronic Resource
    Effects of voluntary movements on early auditory brain responses (1996)
    Springer
    Experimental brain research 110 (1996), S. 487-492 
    Details
    ISSN: 1432-1106
    Keywords: EEG ; Voluntary movement ; Auditory ; Steady-state response ; Evoked response ; Human
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract It has not been clear whether or not early information processing in the human auditory cortex is altered by voluntary movements. We report a movementrelated, complex event-related potential consisting of relatively long-lasting amplitude and phase perturbations induced in an ongoing auditory steady-state response (SSR) by brief self-paced finger movements. Our results suggest that processing in the auditory cortex during the first 50–100 ms after stimulus delivery is affected before, during, and after voluntary movements, beginning with a 1- to 2-ms delay in the SSR wave form starting 1–2 s before the movement.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00229149
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  • 3
    Electronic Resource
    Electronic Resource
    Visually induced gamma-band responses in human electroencephalographic activity — a link to animal studies (1996)
    Springer
    Experimental brain research 112 (1996), S. 96-102 
    Details
    ISSN: 1432-1106
    Keywords: Viually-induced gamma-band responses ; Coherency ; Evolutionary spectra ; Human
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract Visual presentation of an object produces firing patterns in cell assemblies representing the features of the object. Based on theoretical considerations and animal experiments, it has been suggested that the binding of neuronal representations of the various features is achieved through synchronization of the oscillatory firing patterns. The present study demonstrates that stimulus-induced gamma-band responses can be recorded non-invasively from human subjects attending to a single moving bar. This finding indicates the synchronization of oscillatory activity in a large group of cortical neurons. Gamma-band responses were not as apparent in the presence of two independently moving stimuli, suggesting that the neuronal activity patterns of different objects are not synchronized. These results open a new paradigm for investigating the mechanisms of feature binding and association building in relation to subjective perception.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00227182
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  • 4
    Electronic Resource
    Electronic Resource
    Changed perceptions in Braille readers (1998)
    [s.l.] : Macmillan Magazines Ltd.
    Nature 391 (1998), S. 134-135 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] The mature mammalian nervous system has a striking capacity for plastic remodelling in response to environmental changes, but little is known about the perceptual and behavioural relevance of this phenomenon. Using magnetic source imaging we show that the cortical somatosensory representation ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/34322
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  • 5
    Electronic Resource
    Electronic Resource
    Modulation of oscillatory brain activity and evoked potentials in a repetition priming task in the human EEG (2004)
    Oxford, UK : Blackwell Science Ltd
    European journal of neuroscience 19 (2004), S. 0 
    Details
    ISSN: 1460-9568
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: Cortical object representations seem to require the formation of neural cell assemblies. The physiological correlate of cell assembly activity may be seen in synchronized neural activity in the gamma band range. The improvement in perceiving and identifying an object by experience is commonly referred to as repetition priming. One possible neural mechanism for repetition priming is ‘repetition suppression’ within a cell assembly coding the stimulus. The present electroencephalogram study was designed to investigate oscillatory brain activity when line drawings of concrete objects were repeated either immediately after a first presentation or after intervening a number of different stimuli. Results showed a broad posterior distribution of induced gamma band responses (GBRs) after the initial picture presentation. Repeated presentations of the same picture led to a significant decrease of induced gamma power. Furthermore, repeated presentations of the same object resulted in a decrease in phase synchrony between distant electrode sites. No significant repetition effects were found in the alpha or beta frequency range. The event-related potential (ERP), which was also modulated by priming, showed a different scalp distribution compared with induced GBRs. In addition, ERP repetition effects decayed at larger intervals between initial and repeated presentations, whereas induced GBRs were not modulated as a function of stimulus lag. We concluded that the decrease in amplitude of induced GBRs and the reduction of gamma phase synchrony between pairs of electrodes after repeated picture presentations might be linked to a ‘sharpening’ mechanism within a cell assembly representing an object.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.0953-816X.2004.03176.x
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  • 6
    Electronic Resource
    Electronic Resource
    Cell-free synthesis and membrane-integration of the reaction center subunit H from Rhodobacter capsulatus (1992)
    Oxford, UK : Blackwell Publishing Ltd
    FEMS microbiology letters 91 (1992), S. 0 
    Details
    ISSN: 1574-6968
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: Abstract The H-subunit of the photosynthetic reaction center of Rhodobacter capsulatus was synthesized in vitro by programming a R. capsulatus cell-free translation system with isolated H-protein mRNA. When intracytoplasmic membrane vehicles of R. capsulatus were added cotranslationally, newly synthesized H-protein sedimented on sucrose gradients with the membranes. The majority of the membrane-associated H-protein was resistant towards extraction with 6 M urea or 0.2 M Na2CO3 at pH 10.5. The urea-extractibility, however, increased significantly when membranes had been treated with trypsin prior to the insertion of the H-subunit, suggesting that the membrane assembly of the H-protein is dependent on (a) proteinaceous factor(s).
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1574-6968.1992.tb05197.x
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  • 7
    Electronic Resource
    Electronic Resource
    A combined stage 1 and 2 repair for hypoplastic left heart syndrome: anaesthetic considerations (2003)
    Oxford, UK : Blackwell Science Ltd
    Pediatric anesthesia 13 (2003), S. 0 
    Details
    ISSN: 1460-9592
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: Therapy of hypoplastic left heart syndrome (HLHS) consists of the staged Norwood procedure or cardiac transplantation. Stenting the ductus arteriosus and subsequent banding of the pulmonary arteries allows the combination of neoaortic reconstruction with the establishment of a bidirectional cavopulmonary connection (combined stage 1 and 2 procedure) in a later session. We report the anaesthetic management in eight infants ranging from 107 to 195 days undergoing a combined stage 1 and 2 procedure. Nonselective pulmonary vasodilators and nitric oxide were needed in all cases to improve oxygen saturation in the postbypass period. Phosphodiesterase inhibitors and epinephrine were required in all patients for inotropic support during and after weaning off cardiopulmonary bypass. The procedure was successful in seven patients. One patient died intraoperatively because of right heart failure. The physiological changes of this new surgical strategy for palliation of HLHS offers a challenge for the anaesthetist primarily in the early postbypass period.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1046/j.1460-9592.2003.01047.x
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  • 8
    Electronic Resource
    Electronic Resource
    Reply to Fischer (2004)
    Oxford, UK : Blackwell Publishing Ltd
    Pediatric anesthesia 14 (2004), S. 0 
    Details
    ISSN: 1460-9592
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1460-9592.2004.01272_2.x
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  • 9
    Electronic Resource
    Electronic Resource
    Translocation of precytochrome C2 into intracytoplasmic membrane vesicles of Rhodobacter capsulatus requires a peripheral membrane protein (1993)
    Oxford, UK : Blackwell Publishing Ltd
    Molecular microbiology 7 (1993), S. 0 
    Details
    ISSN: 1365-2958
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology , Medicine
    Notes: Rhodobacter capsulatus is a member of the group α-purple bacteria which are closely related to the ancestral endosymbiont that gave rise to mitochondria. It has therefore been hypothesized that the molecular mechanisms governing protein export in α-purple bacteria have been conserved during the evolution of mitochondria. To enable analysis of protein export in α-purple bacteria we describe here the development of a homologous cell-free synthesis/export system consisting entirely of components of R. capsulatus. Translocation of precytochrome C2 into intracytoplasmic membrane vesicles of this organism was found to require the proton-motive force and proceed at a significantly higher efficiency when membranes were present during protein synthesis. Furthermore, we show that, in this cell-free system, translocation depends on a preparation of peripheral membrane proteins Which do not possess detectable SecA- and SecB-like actvities.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-2958.1993.tb01108.x
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  • 10
    Electronic Resource
    Electronic Resource
    Cuprous Halide Microcrystals Containing Photochromic Sol-Gel Glass (1998)
    Springer
    Journal of sol gel science and technology 11 (1998), S. 197-201 
    Details
    ISSN: 1573-4846
    Keywords: photochromic sol-gel materials ; UV-Vis spectroscopy ; CuBr microcrystal
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract CuBr containing photochromic sol-gel glasses were synthesized by the introduction of CuBr dissolved in CH3CN into a sol-gel of Al2O3-SiO2 type. Microcrystals of CuBr were developed by a two step heat treatment, the first step in air initially at 280°C/2 h and then at 410°C/2 h for the removal of the organics and the second step at 700°C/2 h in nitrogen atmosphere for the reduction of the copper compounds to Cu+. Photometric measurements of the small gel pieces show a distinct darkening of 24% and a remarkable fading at room temperature of 13% within 10 minutes.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1008653732620
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