Pierre Braunstein, J. Dehand, J. F. NENNIG,
Two new heteronuclear tetrametallic complexes (CO)5Co2(CO)2Pt2(CO) (PPh3)2 (I), (η-C5H5)2(CO)2Mo2(CO)4Pt2(PPh3)2 (II) and a new homonuclear trimetallic complex Pt3(CO)2(PPH3)4 (III) have been synthesised by reaction between carbonylmetallate anions NA[(Co(CO)4] or Na[(π-C5H5)Mo(CO)3] and cis- or trans-PtCl2(PPh3)2. The compounds were characterised by analysis and IR spectroscopy. On the basis of preliminary X-ray results, I and II appear to have a tetrahedral arrangement of the metallic atoms in a “butterfly”- ...
Tópico(s): Asymmetric Hydrogenation and Catalysis
1975 - Elsevier BV | Journal of Organometallic Chemistry
J. FISCHER, A. Mitschler, R. Weiss, J. Dehand, J. F. NENNIG,
The synthesis, spectroscopic features and crystal structure of a new heteronuclear cluster compound [P(C6H5)3]2Pt2C02(CO)8 of butterfly type are reported.
Tópico(s): Carbon dioxide utilization in catalysis
1975 - Elsevier BV | Journal of Organometallic Chemistry
Tópico(s): Magnetism in coordination complexes
1974 - Elsevier BV | Inorganic and Nuclear Chemistry Letters
Maria Blatow, Ernst Nennig, E. Sarpaczki, Julia Reinhardt, Martin Schlieter, Christian Herweh, Dirk Rasche, Volker Tronnier, K. Sartor, Christoph Stippich,
Trigeminal neuralgia (TN) is a pain state characterized by intermittent unilateral pain attacks in one or several facial areas innervated by the trigeminal nerve. The somatosensory cortex is heavily involved in the perception of sensory features of pain, but it is also the primary target for thalamic input of nonpainful somatosensory information. Thus, pain and somatosensory processing are accomplished in overlapping cortical structures raising the question whether pain states are associated with ...
Tópico(s): Migraine and Headache Studies
2009 - Wiley | Human Brain Mapping
Stefan Kaiser, Stephan Walther, Ernst Nennig, Klaus Kronmüller, Christoph Mundt, Matthias Weisbrod, Christoph Stippich, Kai Vogeley,
In the context of the present study spatial perspective taking refers to the ability to translocate one's own egocentric viewpoint to somebody else's viewpoint in space. We adopted a spatial perspective taking paradigm and performed a functional magnetic resonance imaging study to assess gender differences of neural activity during perspective taking. 24 healthy subjects (12 male/12 female) were asked to systematically either take their own (first-person-perspective, 1PP) or another person's perspective ( ...
Tópico(s): Categorization, perception, and language
2008 - Elsevier BV | Neuropsychologia
Christian Herweh, M. Akbar, Martina Wengenroth, Maria Blatow, J. Mair-Walther, N. Rehbein, Ernst Nennig, Jens‐Peter Schenk, Sabine Heiland, Christoph Stippich,
Tópico(s): Cerebrospinal fluid and hydrocephalus
2008 - Elsevier BV | NeuroImage
Benoît Nennig, Emmanuel Perrey‐Debain, Mabrouk Ben Tahar,
A mode matching method for predicting the transmission loss of a cylindrical shaped dissipative silencer partially filled with a poroelastic foam is developed. The model takes into account the solid phase elasticity of the sound-absorbing material, the mounting conditions of the foam, and the presence of a uniform mean flow in the central airway. The novelty of the proposed approach lies in the fact that guided modes of the silencer have a composite nature containing both compressional and shear ...
Tópico(s): Fluid Dynamics and Vibration Analysis
2010 - Acoustical Society of America | The Journal of the Acoustical Society of America
Maria Blatow, Ernst Nennig, Anita Durst, K. Sartor, Christoph Stippich,
Unilateral sensory stimulation reliably elicits contralateral somatotopic activation of primary (SI) and secondary (SII) somatosensory cortex. There is an ongoing debate about the occurrence and nature of concomitant ipsilateral SI and SII activation. Here we used functional magnetic resonance imaging (fMRI) in healthy human subjects with unilateral tactile stimulation of fingers and lips, to compare somatosensory activation patterns from distal and proximal body parts. We hypothesized that fMRI in ...
Tópico(s): Neural dynamics and brain function
2007 - Elsevier BV | NeuroImage
... et al. 1995; Schmitt-Grohé et al. 1995; Nennig et al. 1996; Birkebaek et al. 1999; Gilberg ...
Tópico(s): Infective Endocarditis Diagnosis and Management
2007 - Springer Nature | Advances in experimental medicine and biology
Christoph Stippich, Nora Rapps, Jens Dreyhaupt, Anita Durst, Bodo Kress, Ernst Nennig, Volker Tronnier, K. Sartor,
Purpose: To prospectively assess the feasibility of standardized presurgical functional magnetic resonance (MR) imaging for localizing the Broca and Wernicke areas and for lateralizing language function. Materials and Methods: The study was approved by the responsible ethics commission, and patients gave written informed consent. Eighty-one patients (36 female and 45 male patients; age range, 7–75 years) with different brain tumors underwent blood oxygen level–dependent functional MR imaging at 1. ...
Tópico(s): Traumatic Brain Injury Research
2007 - Radiological Society of North America | Radiology
Benoît Nennig, Mabrouk Ben Tahar, Emmanuel Perrey‐Debain,
In the present work, the propagation of sound in a lined duct containing sheared mean flow is studied. Walls of the duct are acoustically treated with absorbent poroelastic foams. The propagation of elasto-acoustic waves in the liner is described by Biot's model. In the fluid domain, the propagation of sound in a sheared mean flow is governed by the Galbrun's equation. The problem is solved using a mixed displacement-pressure finite element formulation in both domains. A 3D implementation of the ...
Tópico(s): Wind and Air Flow Studies
2011 - Acoustical Society of America | The Journal of the Acoustical Society of America
Maria Blatow, Julia Reinhardt, Katharina Riffel, Ernst Nennig, Martina Wengenroth, Christoph Stippich,
Abstract Purpose: To establish a passive motor paradigm for clinical functional MRI (fMRI) that could be beneficial for patients with motor or attention deficits who are not able to perform active motor tasks. Materials and Methods: A novel standardized sensorimotor fMRI protocol was applied in 16 healthy volunteers at 3 Tesla (T) using active and passive motor tasks as well as sensory stimulation of hands and feet. Data analysis was carried out individually using a dynamic thresholding routine. Results: ...
Tópico(s): Transcranial Magnetic Stimulation Studies
2011 - Wiley | Journal of Magnetic Resonance Imaging
Benoît Nennig, Emmanuel Perrey‐Debain, Jean-Daniel Chazot,
Tópico(s): Geotechnical Engineering and Underground Structures
2011 - Elsevier BV | Engineering Analysis with Boundary Elements
Jean-Daniel Chazot, Benoît Nennig, Ameur Chettah,
This paper uses the ZPST multilayered shell element developed by Sulmoni et al. to compute the dynamic response of multilayered viscoelastic structures such as windscreens or car bodyworks. It is based on the P-order shear deformation theory with an added zigzag function. The viscoelastic properties are taken into account with frequency dependent elastic moduli measured with a Dynamic Mechanical Thermal Analyzer. A method based on Padé approximant is also used to reduce the computation time. This ...
Tópico(s): Mechanical Engineering and Vibrations Research
2011 - Elsevier BV | Computers & Structures
Dirk Rasche, Bodo Kress, Christoph Stippich, Ernst Nennig, K. Sartor, Volker Tronnier,
Abstract OBJECTIVE: Most so-called idiopathic trigeminal neuralgias (TN) are caused by neurovascular compression. Does the size of the cerebellopontine cistern play a role in favoring a neurovascular conflict? The aim of this prospective study was to measure the volume of the parapontine cistern in patients with idiopathic TN and to perform a comparison with healthy controls. METHODS: In 25 patients with unilateral idiopathic TN and 17 healthy participants, high-resolution 1.5-T magnetic resonance ...
Tópico(s): Neurosurgical Procedures and Complications
2006 - Lippincott Williams & Wilkins | Neurosurgery
Jean-Daniel Chazot, Benoît Nennig, Emmanuel Perrey‐Debain,
The paper deals with the numerical simulation of the acoustic field in two-dimensional cavities in which absorbing materials are present. Though Finite Element Method (FEM) could be employed for this purpose, the discretization level required for achieving reasonable accuracy renders the method impractical in the mid-frequency range. To alleviate this limitation, the Partition of Unity Finite Element Method (PUFEM) using plane wave functions has been shown to be very effective for solving short wave ...
Tópico(s): Electromagnetic Simulation and Numerical Methods
2012 - Elsevier BV | Journal of Sound and Vibration
Benoît Nennig, Ygäal Renou, Jean‐Philippe Groby, Yves Aurégan,
This work investigates the acoustical properties of a multilayer porous material in which periodic inclusions are embedded. The material is assumed to be backed by a rigid wall. Most of the studies performed in this field used the multipole method and are limited to circular shape inclusions. Here, a mode matching approach, more convenient for a layered system, is adopted. The inclusions can be in the form of rigid scatterers of an arbitrary shape, in the form of an air-filled cavity or in the form ...
Tópico(s): Numerical methods in engineering
2012 - Acoustical Society of America | The Journal of the Acoustical Society of America
Sasan Partovi, Florian Konrad, Sasan Karimi, Fabian Rengier, John K. Lyo, Lisa Zipp, Ernst Nennig, Christoph Stippich,
Rationale and Objectives The aim of this study was to assess the intrasubject and intersubject reproducibility of functional magnetic resonance imaging (fMRI) language paradigms on language localization and lateralization. Materials and Methods Fourteen healthy volunteers were enrolled prospectively and underwent language fMRI using visually triggered covert and overt sentence generation (SG) and word generation (WG) paradigms. Semiautomated analysis of all functional data was performed using Brain ...
Tópico(s): Functional Brain Connectivity Studies
2012 - Elsevier BV | Academic Radiology
Christoph Stippich, Alexander Romanowski, Ernst Nennig, Bodo Kress, K. Sartor,
Tópico(s): Advanced MRI Techniques and Applications
2005 - Elsevier BV | Neuroscience Letters
... Studies in Medicine. 2005:S440-S443. Google Scholar13. Nennig ME, Shinefield HR, Edwards KM, Black SB, Fireman ...
Tópico(s): Virology and Viral Diseases
2005 - American College of Physicians | Annals of Internal Medicine
Dirk Rasche, S Siebert, Christoph Stippich, Bodo Kress, Ernst Nennig, K. Sartor, Tronnier Vm,
Tópico(s): Myofascial pain diagnosis and treatment
2005 - Springer Science+Business Media | Der Schmerz
Dirk Rasche, Stefanie Siebert, Christoph Stippich, Bodo Kress, Ernst Nennig, K. Sartor, Volker Tronnier,
Tópico(s): Musculoskeletal pain and rehabilitation
2005 - Springer Science+Business Media | Der Schmerz
Tópico(s): Infectious Encephalopathies and Encephalitis
1996 - American Medical Association | JAMA
Objectives. —To determine the prevalence of Bordetella pertussis infection among adults who have prolonged cough for 2 weeks or longer and to estimate the incidence of B pertussis infection in adults in a defined urban population. Design. —A prospective clinical study. Setting. —Kaiser Permanente, San Francisco (Calif) Medical Center. Participants. —One hundred fifty-three referred and participating health plan members 18 years old or older with the complaint of cough persisting for 2 weeks or longer and 154 health ...
Tópico(s): Influenza Virus Research Studies
1996 - American Medical Association | JAMA
Christoph Stippich, Alexander Romanowski, Ernst Nennig, Bodo Kress, Stefan Hähnel, K. Sartor,
Tópico(s): Transcranial Magnetic Stimulation Studies
2004 - Elsevier BV | Neuroscience Letters
Antonio Colombo, Evangelia Karvouni,
... Online publication date: 1-Jul-2016. Hiebl B, Nennig E, Schiestel S, Kovacs A, Jung F, Fischer ...
Tópico(s): Aortic aneurysm repair treatments
2000 - Lippincott Williams & Wilkins | Circulation
Jean-Daniel Chazot, Emmanuel Perrey‐Debain, Benoît Nennig,
Recently Chazot et al. [J. Sound Vib. 332, 1918-1929 (2013)] applied the Partition of Unity Finite Element Method for the analysis of interior sound fields with absorbing materials. The method was shown to allow a substantial reduction of the number of degrees of freedom compared to the standard Finite Element Method. The work is however restricted to a certain class of absorbing materials that react like an equivalent fluid. This paper presents an extension of the method to the numerical simulation ...
Tópico(s): Aerodynamics and Acoustics in Jet Flows
2014 - Acoustical Society of America | The Journal of the Acoustical Society of America
Jean‐Philippe Groby, Clément Lagarrigue, Bruno Brouard, Olivier Dazel, Vincent Tournat, Benoît Nennig,
The absorption properties of a metaporous material made of non-resonant simple shape three-dimensional inclusions (cube, cylinder, sphere, cone and torus) embedded in a rigidly backed rigid frame porous material is studied. A nearly total absorption can be obtained for a frequency lower than the quarter-wavelength resonance frequency due to the excitation of a trapped mode. To be correctly excited, this mode requires a filling fraction larger in the three-dimensions than in the two-dimensions for ...
Tópico(s): Thermal Radiation and Cooling Technologies
2014 - Acoustical Society of America | The Journal of the Acoustical Society of America
Wendy Wilson, Wellington Onyenwe, Joshua M. Bradner, Sadie E. Nennig, W. Michael Caudle,
Exposure to environmental contaminants, such as organochlorine insecticides during critical periods of neurodevelopment has been shown to be a major contributor to several neuropsychological deficits seen in children, adolescence, and adults. Although the neurobehavioral outcomes resulting from exposure to these compounds are known the neurotransmitter circuitry and molecular targets that mediate these endpoints have not been identified. Given the importance of the frontal cortex in facilitating ...
Tópico(s): Anesthesia and Neurotoxicity Research
2014 - Wiley | Synapse
Magdalini Tozakidou, Holger Wenz, Julia Reinhardt, Ernst Nennig, Katharina Riffel, Maria Blatow, Christoph Stippich,
Hemispheric lateralization is a frequently encountered phenomenon of cortical function. It describes the functional specialization of a region on one side of the brain for a given task. It is well characterized in motor and sensory, as well as language systems and becomes more and more known for various cognitive domains. While in the adult healthy brain hemispheric lateralization is mostly set, pathological processes may lead to cortical reorganization. In these cases neuroplasticity of the corresponding ...
Tópico(s): Advanced Neuroimaging Techniques and Applications
2013 - Elsevier BV | NeuroImage Clinical