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Karpati G, Carpenter S, Engel A, Watters G, Allen J, Rothman S, Klassen G, Mamer O. Syndrome of systemic carnitine deficiency: Clinical, morphologic, biochemical, and pathophysiologic features. Neurology 2011. [DOI: 10.1212/01.wnl.0000397288.31677.46] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
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Oswald S, Nassif A, Modess C, Keiser M, Ulrich A, Runge D, Hanke U, Lütjohann D, Engel A, Weitschies W, Siegmund W. Drug Interactions Between the Immunosuppressant Tacrolimus and the Cholesterol Absorption Inhibitor Ezetimibe in Healthy Volunteers. Clin Pharmacol Ther 2011; 89:524-8. [DOI: 10.1038/clpt.2011.4] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Loffeld RJLF, Engel A, Dekkers PEP. Incidence and causes of colonoscopic perforations: a single-center case series. Endoscopy 2011; 43:240-2. [PMID: 21165826 DOI: 10.1055/s-0030-1255939] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
Perforations are known to occur after colonoscopy. In a consecutive study the localization of the perforation was determined, and the etiology of the perforation was classified as: therapeutic, barotraumatic or mechanical. A colonic perforation occurred in 26 of 19,135 patients (0.14%). In 13 cases (50.0%) the cause of perforation was mechanical, in nine (34.6%) the cause was a barotrauma (cecal blow-out), and in three cases (11.5%) it was due to a therapeutic procedure (coagulation or polypectomy). In one case (3.8%) data were not available. Cecal blow-out occurred significantly more often as a result of barotrauma, whereas perforation of the sigmoid occurred more often as a result of direct mechanical trauma. The risk of perforation after colonoscopy is rather low. Barotrauma due to insufflated air occurs more often than therapeutic perforation due to polypectomy or coagulation. Patients with a higher risk of perforation are those with diverticula in the sigmoid.
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Engel A, Lysholm E. A New Roentgenological Method of Pancreas Examination and Its Practical Results. Acta Radiol 2010. [DOI: 10.3109/00016923409134924] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
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55
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Engel-Yeger B, Engel A, Kessel A. Differences in leisure activities between children with allergic rhinitis and healthy peers. Int J Pediatr Otorhinolaryngol 2010; 74:1415-8. [PMID: 20951444 DOI: 10.1016/j.ijporl.2010.09.021] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/04/2010] [Revised: 09/03/2010] [Accepted: 09/19/2010] [Indexed: 10/18/2022]
Abstract
OBJECTIVE The symptoms of allergic rhinitis (AR) are frequently evoked when individuals with AR perform daily activities. Thus, AR may interfere the optimal participation in daily life, negatively impact the patient's productivity and quality of life (QOL). While most studies refer to adult with AR, this pilot study examined participation of children with AR as expressed in their daily activity preferences. METHODS Participants were 31 children with AR and 31 healthy children, aged 5-11 years. All children completed the Preference for Activities of Children (PAC). RESULTS Children with AR showed significantly lower preference to participate in skill-based, social and informal activities, as compared to their healthy peers (F(7,53)=2.61, p=0.02, ES-η(2)=0.27). Children with AR showed 5-20% lower preference to participate in activity than their typical peers. CONCLUSIONS AR may negatively impact children's preference to participate in daily activities. Treatment of children with AR should consider a multi-disciplinary intervention for encouraging their optimal development, improve their well-being and QOL.
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Brook OR, Hakmon T, Brook A, Dudnik E, Kuten A, Engel A. The effect of a Radiology Conference consultation on cancer patients management. Ann Oncol 2010; 22:1204-1208. [PMID: 21084427 DOI: 10.1093/annonc/mdq581] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
BACKGROUND The quantitative effect of consultation on cancer patient's management at a Radiology Conference was studied. PATIENTS AND METHODS This prospective study included consecutive patients presented at the Radiology Conference of the Division of Oncology. Following the case presentation and discussion, the patient's oncologist completed a questionnaire which asked whether the consultation at the conference added new information regarding the patient's disease status, whether it influenced patient management and, if so, to what extent. RESULTS Three hundred and eighty-three patients were included in the study. Significant new information was added for 189 (49%) patients and less consequential information was added for 134 (35%) patients. Major changes in management occurred in 143 (37%) patients after the Radiology Conference and minor changes were made in 56 (15%) patients. The influence of the cancer type on the rate of significant change in treatment and on the rate of major information addition was not statistically significant. CONCLUSION Consultation at a Radiological Conference in a tertiary center led to major changes in the management of 37% of the cancer patients presented and provided important information regarding the patient's disease in up to 50% of patients.
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Witoonpanich R, Pulkes T, Dejthevaporn C, Yodnopklao P, Witoonpanich P, Wetchaphanphesat S, Brengman J, Engel A. P2.39 Mutation of alpha subunit of acetylcholine receptor causing slow-channel congenital myasthenic syndrome in a Thai family. Neuromuscul Disord 2010. [DOI: 10.1016/j.nmd.2010.07.111] [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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Laube JC, Kaiser J, Sturges WT, Bönisch H, Engel A. Chlorine Isotope Fractionation in the Stratosphere. Science 2010; 329:1167. [DOI: 10.1126/science.1191809] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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Janzen K, Engel A, Mézard M. Thermodynamics of the Lévy spin glass. PHYSICAL REVIEW. E, STATISTICAL, NONLINEAR, AND SOFT MATTER PHYSICS 2010; 82:021127. [PMID: 20866795 DOI: 10.1103/physreve.82.021127] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/15/2010] [Indexed: 05/29/2023]
Abstract
We investigate the Lévy glass, a mean-field spin-glass model with power-law distributed couplings characterized by a divergent second moment. By combining extensively many small couplings with a spare random backbone of strong bonds the model is intermediate between the Sherrington-Kirkpatrick and the Viana-Bray models. A truncated version where couplings smaller than some threshold ε are neglected can be studied within the cavity method developed for spin glasses on locally treelike random graphs. By performing the limit ε→0 in a well-defined way we calculate the thermodynamic functions within replica symmetry and determine the de Almeida-Thouless line in the presence of an external magnetic field. Contrary to previous findings we show that there is no replica-symmetric spin-glass phase. Moreover we determine the leading corrections to the ground-state energy within one-step replica symmetry breaking. The effects due to the breaking of replica symmetry appear to be small in accordance with the intuitive picture that a few strong bonds per spin reduce the degree of frustration in the system.
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Engelhardt H, Engel A, Baumeister W. Stoichiometric model of the photosynthetic unit of Ectothiorhodospira halochloris. Proc Natl Acad Sci U S A 2010; 83:8972-6. [PMID: 16593781 PMCID: PMC387056 DOI: 10.1073/pnas.83.23.8972] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
A stoichiometric model of the photosynthetic unit of Ectothiorhodospira halochloris has been obtained by means of scanning transmission electron microscope mass determination and mass mapping in conjunction with polyacrylamide gel electrophoresis. One reaction center, consisting of four single polypeptides, including one cytochrome, is surrounded by six identical light-harvesting complexes, each containing three polypeptides with 2:2:2 stoichiometry. This stoichiometric model was incorporated into the three-dimensional structure of the photosynthetic unit as derived from surface relief reconstructions of the two surfaces of shadowed membranes. The reaction center protrudes substantially from both membrane surfaces and has the cytochrome attached to the periplasmic face in a noncentrosymmetric fashion. The reaction center may assume various orientations within the photosynthetic complexes.
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Dorset DL, Engel A, Massalski A, Rosenbusch JP. Three Dimensional Structure of a Membrane Pore: Electron Microscopical Analysis of Escherichia coli Outer Membrane Matrix Porin. Biophys J 2010; 45:128-9. [PMID: 19431536 DOI: 10.1016/s0006-3495(84)84135-1] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022] Open
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62
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Engel A. Comment on' Superconducting transition in Nb nanowires fabricated using a focused-ion beam'. NANOTECHNOLOGY 2010; 21:168001-168002. [PMID: 20351401 DOI: 10.1088/0957-4484/21/16/168001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
Abstract
In a recent paper Tettamanzi et al (2009 Nanotechnology 20 465302) describe the fabrication of superconducting Nb nanowires using a focused-ion beam. They interpret their conductivity data in the framework of thermal and quantum phase slips below T(c). In the following we will argue that their analysis is inappropriate and incomplete, leading to contradictory results. Instead, we propose an interpretation of the data within an SN proximity model.
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Engel A. Asymptotics of work distributions in nonequilibrium systems. PHYSICAL REVIEW. E, STATISTICAL, NONLINEAR, AND SOFT MATTER PHYSICS 2009; 80:021120. [PMID: 19792090 DOI: 10.1103/physreve.80.021120] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/25/2008] [Revised: 06/24/2009] [Indexed: 05/28/2023]
Abstract
The asymptotic behavior of the work distribution in driven nonequilibrium systems is determined using the method of optimal fluctuations. For systems described by Langevin dynamics the corresponding Euler-Lagrange equation together with the appropriate boundary conditions and an equation for the leading pre-exponential factor are derived. The method is applied to three representative examples and the results are used to improve the accuracy of free-energy estimates based on the application of the Jarzynski equation.
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Engel A, Pagel H. Increased production of erythropoietin after application of antidiuretic hormone. A consequence of renal vasoconstriction? Exp Clin Endocrinol Diabetes 2009; 103:303-7. [PMID: 8536059 DOI: 10.1055/s-0029-1211370] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
The renal glycoprotein hormone erythropoietin (Epo) is the key element in the feedback control of the production of red blood cells (RBC) in bone marrow. Excess of antidiuretic hormone (ADH) increases the RBC mass by increasing the synthesis of Epo. The mechanism of the Epo stimulating effect of ADH is not fully understood. Rats were treated with ADH with or without prior injection of a V1a-receptor antagonist. Additional experiments were carried out by stimulating the V2-receptor by desmopressin (DDAVP). Epo level in plasma was doubled following injections of ADH. Blockade of the V1a-receptor completely abolished the Epo stimulating effect of ADH. Neither ADH alone nor the combined giving of V1a-antagonist and ADH had an influence on the glomerular filtration rate or the renal plasma flow. Therefore, the increased Epo synthesis after application of ADH cannot be explained by a constriction of renal blood vessels with consecutive ischemic hypoxia. There is rather a direct stimulation of Epo synthesis by ADH via its receptors. Since a selective stimulation of the V2-receptor by DDAVP did not increase to Epo level in plasma, the observed increase of Epo is mediated by the V1a-receptor.
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Dinser R, Braun A, Jendro MC, Engel A. Increased titres of anti‐nuclear antibodies do not predict the development of associated disease in the absence of initial suggestive signs and symptoms. Scand J Rheumatol 2009; 36:448-51. [DOI: 10.1080/03009740701406577] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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66
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Engel A, Hajek P, Kramer J, Hamilton G, Oesterreicher C, Lintner F, Clauss W. Magnetic resonance knee arthrography. ACTA ACUST UNITED AC 2009. [DOI: 10.3109/17453679009154167] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
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67
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Brook OR, Guralnik L, Hardak E, Oren I, Sprecher H, Zuckerman T, Engel A, Yigla M. Radiological findings of early invasive pulmonary aspergillosis in immune-compromised patients. Hematol Oncol 2009; 27:102-6. [DOI: 10.1002/hon.879] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
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68
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Milone M, Shen X, Selcen D, Ohno K, Brengman J, Iannaccone S, Harper C, Engel A. 62. Congenital myasthenic syndrome due to defects in rapsyn: A large cohort. Clin Neurophysiol 2009. [DOI: 10.1016/j.clinph.2008.10.080] [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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69
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Brook O, Fischer D, Litmanovich D, Leiderman M, Molnar R, Ghersin E, Shreiber R, Hirshenbaum A, Kleinhaus U, Rosenberger A, Engel A. Prospective study of digital radiographs versus conventional screen films in Small Bowel Follow-Through examination. Comput Med Imaging Graph 2008; 32:531-8. [DOI: 10.1016/j.compmedimag.2008.06.002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2008] [Accepted: 06/03/2008] [Indexed: 10/21/2022]
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Hoogenboom BW, Frederix PLTM, Fotiadis D, Hug HJ, Engel A. Potential of interferometric cantilever detection and its application for SFM/AFM in liquids. NANOTECHNOLOGY 2008; 19:384019. [PMID: 21832578 DOI: 10.1088/0957-4484/19/38/384019] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
We have developed an optical cantilever deflection detector with a spot size <3 µm and fm Hz(-1/2) sensitivity over a>10 MHz bandwidth. In this work, we demonstrate its potential for detecting small-amplitude oscillations of various flexural and torsional oscillation modes of cantilevers. The high deflection sensitivity of the interferometer is particularly useful for detecting cantilever oscillations in aqueous solutions, enabling us to reach the thermal noise limit in scanning or atomic force microscopy experiments with stiff cantilevers. This has resulted in atomic-resolution images of solid-liquid interfaces and submolecular-resolution images of native membranes.
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Hildebrandt H, Zieger A, Engel A, Fritz K, von der Fecht A. Endogene Zeitgeber als Indikatoren von Komatiefe und -remission. KLIN NEUROPHYSIOL 2008. [DOI: 10.1055/s-2008-1060202] [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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72
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Bönisch H, Hoor P, Gurk C, Feng W, Chipperfield M, Engel A, Bregman B. Model evaluation of CO2and SF6in the extratropical UT/LS region. ACTA ACUST UNITED AC 2008. [DOI: 10.1029/2007jd008829] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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73
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Brook O, Ghersin E, Guralnik L, Kaftori J, Amendola M, Engel A. Penile prosthesis reservoir – an imaging pitfall. Clin Radiol 2008; 63:343-7. [DOI: 10.1016/j.crad.2007.05.028] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/25/2006] [Revised: 05/23/2007] [Accepted: 05/25/2007] [Indexed: 11/29/2022]
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74
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Cleuren B, Willaert K, Engel A, Van den Broeck C. Fluctuation theorem for entropy production during effusion of a relativistic ideal gas. PHYSICAL REVIEW. E, STATISTICAL, NONLINEAR, AND SOFT MATTER PHYSICS 2008; 77:022103. [PMID: 18352067 DOI: 10.1103/physreve.77.022103] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/24/2007] [Revised: 11/15/2007] [Indexed: 05/26/2023]
Abstract
The probability distribution of the entropy production for the effusion of a relativistic ideal gas is calculated explicitly. This result is then extended to include particle and antiparticle pair production and annihilation. In both cases, the fluctuation theorem is verified.
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Hildebrandt H, Zieger A, Engel A, Kraft A. Kardiosomatische Kopplung als differentieller Indikator für Komatiefe und Effektivität sensorischer Stimulation*. AKTUELLE NEUROLOGIE 2008. [DOI: 10.1055/s-2007-1017627] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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