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Beckmann P, Legge G, Kallie C, Thompson W. Validation of Image Filters for Studies of Visual Accessibility. J Vis 2011. [DOI: 10.1167/11.15.25] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
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Wallasch TM, Beckmann P, Kropp P. Cerebrovascular reactivity during the Valsalva maneuver in migraine, tension-type headache and medication overuse headache. Funct Neurol 2011; 26:223-227. [PMID: 22364943 PMCID: PMC3814561] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
The aim of this study was to investigate, by means of transcranial Doppler ultrasound (TCD), cerebrovascular reactivity during the Valsalva maneuver (VM) during the headache-free interval in patients with migraine (M), migraine plus tension-type headache (M+TTH), and migraine plus medication overuse headache (M+MOH). A total of 114 patients (n=60 M, n=38 M+TTH, n=16 M+MOH) and n=60 controls were investigated; diagnoses were made according to the International Headache Society criteria. All subjects underwent TCD monitoring and, simultaneously, non-invasive assessment of arterial blood pressure and end-tidal CO2. Two indices were determined: the cerebrovascular Valsalva ratio (CVR) was calculated as the maximum end-diastolic flow velocity acceleration during the late straining phase of the VM [cm/s2] and the centroperipheral Valsalva ratio (CPVR) was defined as the quotient of CVR to the concomitant arterial blood pressure acceleration [cm/mmHg x s]. The dynamic cerebrovascular autoregulatory response to the VM, measured as CVR, was increased in patients with M and M+TTH compared to age-matched healthy subjects. By contrast, CPVR (i.e. the quotient of the cerebrovascular to the peripheral autonomic response), was increased in M patients compared to healthy subjects and all other headache conditions tested. Cerebrovascular autoregulatory response during the VM was increased in M patients compared to age-matched normal healthy subjects, indicating a disturbed autonomic control of cerebral vasoreactivity. The CPVR seems to be a sensitive parameter for distinguishing between M patients and M+TTH or M+MOH patients.
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Affiliation(s)
- T M Wallasch
- MEDAS Ostschweiz, Interdisciplinary Medicine, St. Gallen, Switzerland.
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Beckmann P. Behavioural Evaluation of the Digital Sign System (DSS). J Vis 2010. [DOI: 10.1167/7.15.35] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
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Beckmann P. Das Schnelleinweisungsverfahren für tuberkulöse Sozialversicherte im Heilstättenbetrieb. Dtsch Med Wochenschr 2009. [DOI: 10.1055/s-0028-1121826] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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Rieker O, Klos G, Beckmann P, Vomweg TW, Otto G, Thelen M. Automatische Klassifikation der Lebersegmente nach Couinaud: Entwicklung eines neuen Algorithmus und Evaluierung an Spiral-CT-Datensätzen. ROFO-FORTSCHR RONTG 2003; 175:1655-9. [PMID: 14661136 DOI: 10.1055/s-2003-45336] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Abstract
PURPOSE To develop a software tool that analyzes the anatomy of the portal vein branches and assigns segmental and subsegmental branches according to Couinaud's classification system and to evaluate its accuracy. MATERIALS AND METHODS The algorithm was developed in C++ on a PC. The algorithm recognizes the three major branching patterns of the portal vein. Segmental and subsegmental branches are assigned to 8 segments following Couinaud and encoded by 8 colors. The software was evaluated using CT data sets of 39 patients. After the individual segmental anatomy of each patient was determined by an experienced radiologist, automatic classification was performed and the results were compared on a branch by branch basis. RESULTS The numbering was accurate according to Couinaud's system in 358 of 409 segmental and subsegmental branches (88 %). The assignment failed in 51 of 409 branches due to unexpected anatomy or software problems. CONCLUSION Automatic classification of portal vein branches and their appendant parenchyma is possible. The automatic designation of liver segments enables the three-dimensional visualization of the segmental anatomy. In the future, automatic analysis might facilitate the reporting and communication of CT findings.
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Affiliation(s)
- O Rieker
- Klinik für Radiologie der Johannes-Gutenberg-Universität Mainz.
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Rolling C, Treton D, Beckmann P, Galanaud P, Richard Y. JAK3 associates with the human interleukin 4 receptor and is tyrosine phosphorylated following receptor triggering. Oncogene 1995; 10:1757-61. [PMID: 7538655] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
In human B cells, interleukin 4 (IL4) acts in regulating proliferation, antigen expression, isotype switching and differentiation. These different effects are mediated through the IL4R complex including the IL2R gamma chain (gamma c) and a specific p130/140 binding unit referred below as human Interleukin 4 Receptor (IL4-R). Here, we studied the signal transduction events following IL4R activation and leading to CD23 expression on resting B cells. We demonstrate that IL4R triggering induced the tyrosine phosphorylation of JAK3 and of a p170 protein. Coimmunoprecipitation of JAK3 with the IL4R suggests a physical association which exists prior to IL4R complex stimulation. Orthovanadate treatment, while having no effect on IL4-induced p130 phosphorylation, leads to the hyperphosphorylation of the p170 and inhibits IL4-induced CD23 expression. These suggest that two mandatory steps exist in early IL4 signaling: one controlled by JAK3 activation and the other by the p170 phosphoprotein.
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Affiliation(s)
- C Rolling
- INSERM U131, Institut Paris-Sud sur les Cytokines, Clamart, France
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Abstract
The generating mechanism of the electroencephalogram (EEG) points to the hypothesis that EEG signals derive from a nonlinear dynamic system. Hence, the unpredictability of the EEG might be considered as a phenomenon exhibiting its chaotic character. The essential property of chaotic dynamics is the so-called sensitive dependence on initial conditions. This property can be quantified by calculating the system's first positive Lyapunov exponent, L1. We calculated L1 for sleep EEG segments of 13 schizophrenic patients and 13 control subjects that corresponded to sleep stages I, II, III, IV and REM (rapid eye movement), as defined by Rechtschaffen and Kales, for the lead positions Cz and Pz. During REM sleep, for both electrode positions, the principal Lyapunov exponent L1 was significantly increased in schizophrenic patients compared with control subjects. This finding points to altered nonlinear brain dynamics during REM sleep in schizophrenia.
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Affiliation(s)
- J Röschke
- Department of Psychiatry, University of Mainz, Germany
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Abstract
Conventional sleep analysis according to Rechtschaffen and Kales (1968) has provided meaningful contributions to the understanding of disturbed sleep architecture in depression. However, there is no characteristic alteration of the sleep cycle, which could serve as a highly specific feature for depressive illness. Therefore, we started to investigate nonlinear properties of sleep electroencephalographic (EEG) data in order to elucidate functional alterations other than those obtained from classical sleep analysis. The application of methods from nonlinear dynamical system theory to EEG data has led to the assumption that the EEG can be treated as a deterministic chaotic process. Chaotic systems are characterized by a so-called sensitive dependence on initial conditions. This property can be quantified by calculating the system's Lyapunov exponents, which measure the exponential separation of nearby initial states in phase space. For 15 depressive inpatients (major depressive episodes according to DSM-III-R criteria) and 13 healthy controls, matched in gender, age, and education, we computed the principal Lyapunov exponents L1 of EEG segments corresponding to sleep stages, I, II, III, IV, and rapid eye movement (REM), according to Rechtschaffen and Kales, for the lead positions CZ and PZ. We found statistically significant decreased values of L1 during sleep stage IV in depressives compared with a healthy control group.
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Affiliation(s)
- J Röschke
- Department of Psychiatry, University of Mainz, Germany
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Abstract
To help determine if the EEG is quasiperiodic or chaotic we performed a new analysis by calculating the first positive Lyapunov exponent L1 from sleep EEG data. Lyapunov exponents measure the mean exponential expansion or contraction of a flow in phase space. L1 is zero for periodic as well as quasiperiodic processes, but positive in case of chaotic processes expressing the sensitive dependence on initial conditions. We calculated L1 for sleep EEG segments of 15 healthy male subjects corresponding to sleep stages I, II, III, IV and REM (according to Rechtschaffen and Kales). Our investigations support the assumption that EEG signals are neither quasiperiodic waves nor simple noise. Moreover, we found statistically significant differences between the values of L1 for different sleep stages.
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Affiliation(s)
- J Röschke
- Department of Psychiatry, University of Mainz, Germany
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Albrecht R, Awes TC, Baktash C, Beckmann P, Berger F, Bloomer MA, Bock D, Bock R, Claesson G, Clewing G, Dragon L, Eklund A, Ferguson R, Franz A, Garpman SIA, Glasow R, Gustafsson HÅ, Gutbrod HH, Hölker G, Idh J, Jacobs P, Kampert KH, Kolb BW, Löhner H, Lund I, Obenshain FE, Oskarsson A, Otterlund I, Peitzmann T, Plasil F, Poskanzer AM, Purschke ML, Ritter HG, Roters B, Saini S, Santo R, Schmidt HR, Sorensen SP, Steinhaeuser P, Steffens K, Stenlund E, Stüken D, Young GR. Production of slow singly charged fragments in 200 GeV/c hadron nucleus interactions. ACTA ACUST UNITED AC 1993. [DOI: 10.1007/bf01555736] [Citation(s) in RCA: 84] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Fell J, Röschke J, Beckmann P. Deterministic chaos and the first positive Lyapunov exponent: a nonlinear analysis of the human electroencephalogram during sleep. Biol Cybern 1993; 69:139-146. [PMID: 8373884 DOI: 10.1007/bf00226197] [Citation(s) in RCA: 46] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
Abstract
Under selected conditions, nonlinear dynamical systems, which can be described by deterministic models, are able to generate so-called deterministic chaos. In this case the dynamics show a sensitive dependence on initial conditions, which means that different states of a system, being arbitrarily close initially, will become macroscopically separated for sufficiently long times. In this sense, the unpredictability of the EEG might be a basic phenomenon of its chaotic character. Recent investigations of the dimensionality of EEG attractors in phase space have led to the assumption that the EEG can be regarded as a deterministic process which should not be mistaken for simple noise. The calculation of dimensionality estimates the degrees of freedom of a signal. Nevertheless, it is difficult to decide from this kind of analysis whether a process is quasiperiodic or chaotic. Therefore, we performed a new analysis by calculating the first positive Lyapunov exponent L1 from sleep EEG data. Lyapunov exponents measure the mean exponential expansion or contraction of a flow in phase space. L1 is zero for periodic as well as quasiperiodic processes, but positive in the case of chaotic processes expressing the sensitive dependence on initial conditions. We calculated L1 for sleep EEG segments of 15 healthy men corresponding to the sleep stages I, II, III, IV, and REM (according to Rechtschaffen and Kales). Our investigations support the assumption that EEG signals are neither quasiperiodic waves nor a simple noise. Moreover, we found statistically significant differences between the values of L1 for different sleep stages.(ABSTRACT TRUNCATED AT 250 WORDS)
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Affiliation(s)
- J Fell
- Psychiatrische Klinik, University of Mainz, Germany
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Abstract
The interaction of the trp repressor with several trp operator DNA fragments has been examined by DNA gel retardation assays and by circular dichroism, in the absence and presence of the corepressor L-tryptophan. The holorepressor binds stoichiometrically to both the trpO and aroH operators, forming 1:1 complexes. In the presence of excess protein, additional complexes are formed with these operator fragments. The relative electrophoretic mobilities of the 1:1 complexes differ significantly for trp and aroH operators, indicating that they differ substantially in gross structure. A mutant trp operator, trpOc, has low affinity for the holorepressor, and forms only complexes with stoichiometries of 2:1 (repressor: DNA) or higher, which have a very low electrophoretic mobility. Specific binding is also accompanied by a large increase in the intensity of the near ultraviolet circular dichroism, with only a small blue shift, which is consistent with significant changes in the conformation of the DNA. Large changes in the chemical shifts of three resonances in the 31P NMR spectrum of both the trp operator and the aroH operator occur on adding repressor only in the presence of L-tryptophan, consistent with localised changes in the backbone conformation of the DNA.
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Affiliation(s)
- P Beckmann
- Laboratory of Molecular Structure, National Institute for Medical Research, The Ridgeway, Mill Hill, London
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Heinrichs W, Beckmann P, Dany D, Weiler N, Halmágyi M. [Registration and analysis of airway pressure and gas flow in ventilated patients. The "Hyper-DAQ Respiration Mechanics Recorder"]. Anaesthesist 1992; 41:694-8. [PMID: 1463158] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
Respiratory data monitored in ventilated patients commonly consists of monitoring some inspiratory and expiratory pressures and volumes. For a more sophisticated analysis of respiratory mechanics in ventilated patients, a combined hardware and software system is presented that allows for continuous monitoring of airway pressure and gas flow. Gas flow is measured using a pneumotach. The "Hyper-DAQ" is an 8-channel 12-bit analog to a digital converter that can be connected to IBM PCs as well as to Macintosh computers using a standard RS 232 link. A special module consisting of three pressure transducers (airway pressure, differential pressure for a Fleisch head and ambient pressure) and five additional analog inputs is used for recording respiratory data. Once set up, the Hyper-DAQ records all the data in real time, independently of the host system that can query the data via the RS 232 link. The software runs on IBM and compatible PCs, as well as on Macintosh computers. The software simulates a strip-chart recorder and can be controlled by the keyboard and the mouse. We developed special software for the calibration of pressure and flow. Using models of the gas distribution in the lung compliance, resistance and lung time constants can be calculated from the raw data. For special purposes the data can be transferred to spread-sheet software. A mainstream CO2-detector connected to one of the additional analog inputs allows for additional data: alveolar ventilation, series deadspace, etc. The system presented can be recommended in routine work as well as for scientific studies in ventilated patients.
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Affiliation(s)
- W Heinrichs
- Klinik für Anästhesiologie, Johannes Gutenberg-Universität, Mainz
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Albrecht R, Awes TC, Beckmann P, Berger F, Bloomer MA, Bock D, Bock R, Claesson G, Clewing G, Dragon L, Eklund A, Ferguson RL, Franz A, Garpman S, Glasow R, Gustafsson HÅ, Gutbrod HH, Hartig M, Hölker G, Idh J, Jacobs P, Kampert KH, Kolb BW, Kristiansson P, Löhner H, Lund I, Obenshain FE, Oskarsson A, Otterlund I, Peitzmann T, Persson S, Plasil F, Poskanzer AM, Purschke M, Ritter HG, Roters B, Saini S, Santo R, Schmidt HR, Schmidt R, Sørensen SP, Steffens K, Steinhauser P, Stenlund E, Stüken D, Tincknell ML, Twyhues A, Young GR. Bose-einstein correlations in the target fragmentation region in 200A GeV16O+nucleus collisions. ACTA ACUST UNITED AC 1992. [DOI: 10.1007/bf01597558] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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Borden KL, Bauer CJ, Frenkiel TA, Beckmann P, Lane AN. Sequence-specific NMR assignments of the trp repressor from Escherichia coli using three-dimensional 15N/1H heteronuclear techniques. Eur J Biochem 1992; 204:137-46. [PMID: 1740124 DOI: 10.1111/j.1432-1033.1992.tb16616.x] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
Sequence-specific 15N and 1H assignments for the trp holorepressor from Escherichia coli are reported. The trp repressor consists of two identical 107-residue subunits which are highly helical in the crystal state [Schevitz, R., Otwinowski, Z., Joachimiak, A., Lawson, C. L. & Sigler, P. B. (1985) Nature 317, 782-786]. The high helical content and the relatively large size of the protein (Mr = 25,000) make it difficult to assign even the main-chain resonances by conventional homonuclear two-dimensional NMR methods. However, we have now assigned the main-chain resonances of 94% of the residues by using three-dimensional 15N/1H heteronuclear experiments on a sample of protein uniformly labelled with 15N. The additional resolution obtained by spreading out the signals into three dimensions proved indispensable in making these assignments. In particular, we have been able to resolve signals from residues in the N-terminal region of the A helix for the first time in solution. The observed NOE results confirm that the repressor is highly helical in solution, and contains no extended chain conformations.
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Affiliation(s)
- K L Borden
- Laboratory of Molecular Structure, National Institute for Medical Research, London, England
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Borden KL, Beckmann P, Lane AN. Determination of the orientations of tryptophan analogues bound to the trp repressor and the relationship to activation. Eur J Biochem 1991; 202:459-70. [PMID: 1761046 DOI: 10.1111/j.1432-1033.1991.tb16395.x] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
The antirepressor indole 3-propanoate has been shown by X-ray crystallography to bind in a different orientation compared with the natural corepressor for the tryp repressor, L-tryptophan (Lawson, C.L. & Sigler, P. B. (1988) Nature 333, 869-871). This suggests a simple difference between what constitutes a corepressor versus an antirepressor. We have used visible absorption and 1H-NMR spectroscopy to characterise the nature of several ligand-repressor complexes and DNA-binding assays to assess the relative operator binding affinities. 5-Fluorotryptophan binds with similar affinity and in the same orientation as L-tryptophan, and is an equally effective corepressor. In contrast, the tight-binding antirepressor indole 3-acrylate binds in the same orientation as indole 3-propanoate. Indole, also an antirepressor, also binds in the indole-3-propanoate orientation. 5-Methyltryptamine, a corepressor, shows spectroscopic characteristics of both tryptophan and indoleacrylate, though NOEs indicate that the tryptophan orientation is preferred. These results indicate that the ammonium group in the side chain is essential both for activation and binding in the L-tryptophan orientation. Antirepressors, lacking the ammonium group, bind in the more favourable indole-3-propanoate orientation. Differences in the NMR signatures of the different repressor-ligand complexes indicate that the details of the conformations depend on the nature of the ligands and their orientation within the binding site. Despite any conformational rearrangement of the protein on binding, dissociation of ligands is facile: 5-fluorotryptophan dissociates rapidly at 313 K. These findings complement and extend the X-ray and thermodynamic analyses of ligand binding.
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Affiliation(s)
- K L Borden
- National Institute for Medical Research, Mill Hill, London, England
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Albrecht R, Awes TC, Baktash C, Beckmann P, Berger F, Bock R, Claesson G, Clewing G, Dragon L, Eklund A, Ferguson RL, Franz A, Garpman S, Glasow R, Gustafsson HA, Gutbrod HH, Idh J, Jacobs P, Kampert K, Kolb BW, Kristiansson P, Lee IY, Loehner H, Lund I, Obenshain FE, Oskarsson A, Otterlund I, Peitzmann T, Persson S, Plasil F, Poskanzer AM, Purschke M, Ritter H, Saini S, Santo R, Schmidt HR, Siemiarczuk T, Sorensen SP, Stenlund E, Tincknell ML, Young GR. Distributions of transverse energy and forward energy in 16O- and 32S-induced heavy ion collisions at 60A and 200A GeV. Phys Rev C Nucl Phys 1991; 44:2736-2752. [PMID: 9967709 DOI: 10.1103/physrevc.44.2736] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
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Beckmann P. R. Halin. Graphentheorie. Mathematische Lehrbücher und Monographien, I. Abt., Math. Lehrbücher, Bd. 40. Akademie-Verlag Berlin 1989, 322 S., 56 Abb., Preis 79.00 M, Lizenzausgabe mit Genehmigung der Wissenschaftlichen Buchgesellschaft, Darmstadt, ISBN 3-05-500405-1. Cryst Res Technol 1990. [DOI: 10.1002/crat.2170250306] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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Benninghoven A, Beckmann P, Greifendorf D, Schemmer M. Investigation of surface reactions by SIMS and TDMS: Interaction of ethylene and acetylene with hydrogen on polycrystalline nickel. ACTA ACUST UNITED AC 1980. [DOI: 10.1016/0378-5963(80)90018-5] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Beckmann P, Kirchhoff HW. [The art and science of healing as exemplified by Father Sebastian Kneipp]. Ther Ggw 1980; 119:945-53. [PMID: 7006139] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
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Asteridis H, Beckmann P, Diotinsky I. [Physical factors in animal experiments for testing antimasspsychotic drugs]. Arzneimittelforschung 1975; 25:1463-5. [PMID: 1242672] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
Lemmingson et al. have observed that the movement of masspsychotic lemmings (Lemmus lemmus) shows a distinct preference for the left direction. They suggested that this is due to the influence of the Coriolis force. According to this proposition the influence of the Coriolis force on a group of masspsychotic animals has been investigated quantitatively. The results suggest the following model: Normally the influence of the Coriolos force, which on the northern hemisphere acts to the right, is compensated by a neuromuscular feedback mechanism. The tendency towards the left under masspsychotic conditions corresponds to overcompensation. The tendency to the left should also be observed on the southern hemisphere, if the direction of this compensation is determined genetically. Therefore, the test proposed by Lemmingson et al. is not suited to distinguish between the influence of the Coriolis force and the influence of biologically active left-isomer molecules.
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Beckmann P. [On the periphery of medicine from 1930 until today]. Ther Ggw 1974; 113:1828-38. [PMID: 4467328] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
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Beckmann P. [Respiration and health]. Krankenpflege (Frankf) 1973; 27:509-10. [PMID: 4203543] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
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Beckmann P, Jung K. [Therapy of sleep disorders with gymnastic treatment methods]. Hippokrates 1969; 40:507-10. [PMID: 5807828] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
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Beckmann P, Watz W. [Body weight and cholesterol levels during a terrain treatment without dietary restriction]. Arch Phys Ther (Leipz) 1968; 20:441-7. [PMID: 5721443] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
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deVries HA, Beckmann P, Huber H, Dieckmeir L. Electromyographic evaluation of the effects of sauna on the neuromuscular system. J Sports Med Phys Fitness 1968; 8:61-9. [PMID: 5668684] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
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Beckmann P. Rehabilitation through the Outdoor Activity Program for disorders of autonomic nervous imbalance. J Sports Med Phys Fitness 1967; 7:216-21. [PMID: 5582938] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
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Beckmann K, Beckmann P. [Root atrophy caused by trauma]. Quintessenz 1967; 18:79. [PMID: 5236889] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
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Beckmann P. [Rehabilitation through terrain cures in abnormalities of the vegetative function]. Hippokrates 1967; 38:107-10. [PMID: 5594531] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
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Beckmann P. [The technical course of internistic exercise therapy in a curative institution in patients with functional disorders]. Arch Phys Ther (Leipz) 1966; 18:325. [PMID: 5980597] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
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Beckmann P. [Terrain treatment in exercise therapy--nature, organization and indication]. Therapiewoche 1965; 15:692-4. [PMID: 5838846] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
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Beckmann P. [Treatment of arteriosclerosis by regular body exercises and Cosaldon]. Landarzt 1965; 41:790-2. [PMID: 5828795] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
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Beckmann P, Breil H, Dall'Asta G, Stämpfli R. Praemia. Cell Mol Life Sci 1963. [DOI: 10.1007/bf02151310] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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Abstract
The polarographic reduction of
perinaphthenone and of some of its derivatives has been investigated. It was
found that these compounds are reduced in two one-electron steps. The
adsorptive behaviour of the intermediate reduction product, the free radical,
is compared with that of the fully reduced form and the decomposition rate of
the free radical estimated.
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Beckmann P, Buchanan GS. Direct current polarography of the ferrous-ferric oxolate system in the presence of alternating voltages. Aust J Chem 1958. [DOI: 10.1071/ch9580009] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
The effect of the superposition of a small
alternating voltage on the normal direct voltage applied to the dropping
mercury electrode (D.M.E.) was investigated in the case of the ferrous-ferric
oxalate system. The wave obtained was of the type found previously for ions
which are reversibly reduced at the D.M.E. (e.g. Cd++ etc.). That
is, the rectification of the A.C. produced a D.C. wave (the Z wave) which
crossed the normal D.C. wave (the Y wave) at the half-wave potential (E�),
When surface active materials were added (e.g. cyclohexanol) the reduction
became " irreversible " and at certain concentrations of the surface
active substance a maximum appeared on the Y wave of a somewhat unusual nature.
The effect of a superposed alternating voltage was studied in these cases and
it was found that the adsorption of the cyclohexanol was influenced by the
presence of the alternating voltage.
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Beckmann P. Disziplinäre Fragen im Heilstättenbetrieb. Dtsch Med Wochenschr 1938. [DOI: 10.1055/s-0028-1123450] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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