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Schürmann J, Noack F, Bethge S, Heinze V, Schlitt A. Patients with Heart Failure During and After Inpatient Cardiac Rehabilitation. Vasc Health Risk Manag 2021; 17:49-58. [PMID: 33623387 PMCID: PMC7896792 DOI: 10.2147/vhrm.s276465] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2020] [Accepted: 01/05/2021] [Indexed: 11/23/2022] Open
Abstract
Background Heart failure is the third most fatal disease in Germany and generates considerable treatment costs. The multimodal program of inpatient rehabilitation can improve the symptoms and prognosis of these patients. At the present time, however, only few data are available on the effectiveness of rehabilitation for heart failure patients. Methods After receiving study approval from the ethics committee of the Saxony–Anhalt Medical Association, 200 patients with a primary or secondary diagnosis of heart failure were prospectively included in the study at Paracelsus-Harz-Clinic Bad Suderode, Quedlinburg, Germany. Baseline parameters such as age, gender, and BMI were documented. Outcome variables included NYHA classifications, quality of life, and mortality. For follow-up, the patients were contacted again by mail or phone after three and 12 months and, data on symptoms and serious events were recorded. Results The proportion of patients with a highly reduced ejection fraction (HFrEF) was 13.5%, with a midrange reduced ejection fraction (HFmrEF) 33%, and with preserved ejection fraction (HFpEF) 53.5%. The mean age was 64 ± 11.9 years, the proportion of women 24.1%. The effects of rehabilitation were documented by low overall mortality (no patient died during the stay, only 4% of the patients died in the 12-month follow-up) and an improvement in NYHA classification during and after the inpatient rehabilitation. Conclusion This monocentric study showed effects both for symptoms (improvement in NYHA classifications) and prognosis (overall mortality) after rehabilitation. These data reflect the effectiveness of multimodal rehabilitation and underscore the need for rehabilitation in patients diagnosed with heart failure after an acute event and hospital stay or who present with chronic deterioration.
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Affiliation(s)
- Juliane Schürmann
- Department of Cardiology and Pulmonology AMEOS Clinic Bernburg, Bernburg, Germany
| | - Frank Noack
- Department of Emergency Medicine, University Clinic Halle-Saale, Halle, Germany.,Department of Medicine I, University Clinic Halle-Saale, Halle, Germany
| | - Steffi Bethge
- Paracelsus-Harz-Clinic Bad Suderode, Quedlinburg, Germany
| | | | - Axel Schlitt
- Paracelsus-Harz-Clinic Bad Suderode, Quedlinburg, Germany.,Medical Faculty, Martin-Luther-University Halle-Wittenberg, Halle, Germany
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2
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Mohamed SA, Taube ET, Thiele H, Noack F, Nebrich G, Mohamady K, Hanke T, Klein O. Inside Front Cover: Evaluation of the Aortopathy in the Ascending Aorta: The Novelty of Using Matrix‐Assisted Laser Desorption/Ionization Imaging. Proteomics Clin Appl 2021. [DOI: 10.1002/prca.202170012] [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: 11/10/2022]
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3
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Mohamed SA, Taube ET, Thiele H, Noack F, Nebrich G, Mohamady K, Hanke T, Klein O. Evaluation of the Aortopathy in the Ascending Aorta: The Novelty of Using Matrix-Assisted Laser Desorption/Ionization Imaging. Proteomics Clin Appl 2020; 15:e2000047. [PMID: 33270371 DOI: 10.1002/prca.202000047] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
PURPOSE Histopathological evaluation presents conflicting reports regarding aortic abnormalities. The authors aim to present proof-of-concept study to explore the feasibility of matrix-assisted laser desorption/ionization imaging mass spectrometry (MALDI-IMS) in combination with histopathology for characterizing alterations in the aneurysmal ascending formalin-fixed paraffin-embedded (FFPE) aorta tissue. EXPERIMENTAL DESIGN The authors assess FFPE specimens from patients with a dilated aorta and bicuspid aortic valve (BAV), those with a standard tricuspid aortic valve (TAV), and those with Marfan syndrome (MFS) via histopathology and grade the conditions for elastic fiber fragmentation (EFF) and MALDI-IMS. The proteins using liquid chromatographic-mass spectrometry are identified and the results are confirmed by immunohistochemistry. RESULTS There is significant difference in terms of EFF between MFS and BAV, and TAV and BAV. Characteristic peptide signatures and m/z values in the EFF facilitate the characterization among the aortic specimens of BAV, MFS, and TAV. The m/z values from the aortic alpha smooth muscle actin and myosin heavy chains significantly increase in BAV compared with MFS and TAV. These findings are confirmed by immunohistochemistry. CONCLUSION The results represent a strategy that uses MALDI-IMS in combination with histopathology as promising approaches to characterize spatial alteration in the structure of the aneurysmal ascending aorta.
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Affiliation(s)
- Salah A Mohamed
- Department of Cardiac and Thoracic Vascular Surgery, UKSH-Campus Luebeck, Luebeck, 23538, Germany
| | - Eliane T Taube
- Charité-Universitaetsmedizin, Institute for Pathology, Berlin, 10117, Germany
| | - Herbert Thiele
- Fraunhofer Institute for Digital Medicine MEVIS, Luebeck, 23538, Germany
| | - Frank Noack
- Institute of Pathology Martin-Luther Hospital, Berlin, 14193, Germany
| | - Grit Nebrich
- Berlin Institute of Health Center for Regenerative Therapies & Berlin-Brandenburg Center for Regenerative Therapies (BCRT), Campus Virchow Klinikum (CVK), Charité - Universitätsmedizin Berlin, Berlin, 13353, Germany
| | | | | | - Oliver Klein
- Berlin Institute of Health Center for Regenerative Therapies & Berlin-Brandenburg Center for Regenerative Therapies (BCRT), Campus Virchow Klinikum (CVK), Charité - Universitätsmedizin Berlin, Berlin, 13353, Germany.,German Center for Cardiovascular Research (DZHK), Partner site Berlin, Berlin, 13353, Germany
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4
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Noack F, Schwaab B, Voeller H, Eckrich K, Guha M, Bongarth C, Heinze V, Schlitt A. The current LDL-C target <1.4mmol/l of the ESC is achieved in less than 16% of patients with Coronary Heart Disease despite effective lipid-lowering therapy: data from the LLT-R registry. Eur Heart J 2020. [DOI: 10.1093/ehjci/ehaa946.2998] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Abstract
Background
In the current guideline of the ESC, in patients with very high cardiovascular risk such as coronary heart disease (CHD) a treatment target for LDL-C <1.4mmol/l and/or a halving of the initial value are defined. It is unclear whether these treatment targets are achievable with standard therapy including statins and/or ezetemibe.
Methods
The primary objective of this prospective, multi-centre register study was the question of the guidance-based adaptation and adherence to lipid-lowering therapy during and after a cardiac rehabilitation in 1,100 patients with CHD up to 12 months after discharge from the six rehabilitation clinics involved. Patients were included from 2016 to 2018.
Results
The median age of the 1,100 patients was 63.4±10.4 years, the mean BMI was 28.5±4.7kg/m2, and 24.1% of patients were female. 12.2% were active smokers, 91.6% reported dyslipoproteinemia, 33.9% suffered from diabetes mellitus and 86.5% from hypertension.
The majority of patients were included with the main indications NSTEMI (31.6%), STEMI (29.6%) and after CABG surgery (26.4%).
The proportion of patients treated with statins was more than 94% when admitted and discharged from the rehabilitation clinic, as well as in 3- and 12-months follow-ups.
Approximately 9% of patients were treated with ezetemibe at baseline. On discharge from the rehabilitation clinic 23% of patients were treated with ezetemibe, which remains stable at 3 and 12 months.
PCSK9 inhibitors were used in 0.1–0.3% of patients at all times.
The adjustment of LLT during three week cardiac rehabilitation resulted in median LDL-C values of 2.27mmol/l (1.80/2.84) at baseline, 1.97mmol/l (1.57/2.47) on discharge (p<0.001 compared to baseline), 1.94mmol/l (1.57/2.49) after three months and 1.94mmol/l (1.53/2.40) after 12 months.
The proportion of patients with LDL-C <1.4mmol/l was 9% at baseline, 15.7% on discharge (p<0.001 compared to baseline), 15.6% at three-month follow-up and 15.1% at 12-month follow-up (Figure 1).
Discussion
In the context of cardiac rehabilitation, an effective adjustment of LLT is carried out, which resulted in a significant reduction of LDL-C. However, despite a high percentage of patients on statins and ezetemibe, the proportion of patients in the new target range <1.4mmol/l was only achievable in a small percentage and the question arises whether these treatment targets can be achieved without additional administration of PCSK9 inhibitors in majority of patients with CHD.
Figure 1
Funding Acknowledgement
Type of funding source: Private company. Main funding source(s): This study was supported by an unrestricted grant from Sanofi-Aventis Germany.
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Affiliation(s)
- F Noack
- University Clinic Halle (Saale), Halle, Germany
| | - B Schwaab
- Curschmann Klinik, Timmendorfer Strand, Germany
| | - H Voeller
- University of Potsdam, Potsdam, Germany
| | - K Eckrich
- Clinic Tharandter Wald - Hetzdorf, Halsbrücke, Germany
| | - M Guha
- Rehabilitation Clinic Sendesaal, Bremen, Germany
| | | | - V Heinze
- Paracelsus-Harz-Clinic Bad Suderode, Quedlinburg, Germany
| | - A Schlitt
- Paracelsus-Harz-Clinic Bad Suderode, Quedlinburg, Germany
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5
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Hielscher L, Noack F, Schlitt A. Risikostratifizierung des chronischen Koronarsyndroms – Empfehlungen zur
Risikobewertung und Diagnostik im klinischen Alltag gemäß ESC-Leitlinie
2019. Aktuelle Kardiologie 2020. [DOI: 10.1055/a-1180-8021] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
Abstract
ZusammenfassungDie neue Leitlinie der European Society of Cardiology (ESC) von 2019 liefert neue
Empfehlungen zum Umgang mit dem chronischen Koronarsyndrom (CCS, früher stabile
koronare Herzerkrankung = KHK). In diesem Beitrag werden Methoden zur Bestimmung der
Prätestwahrscheinlichkeit eines CCS und die relevanten diagnostischen Mittel
vorgestellt, wie etwa die neuen Empfehlungen für die Stellung des Angio-CT und die
Verwendung der Koronarangiografie. Ein besonderer Schwerpunkt dieses Beitrags liegt
auf denjenigen Patientengruppen, die Ärzte und Pflegekräfte im klinischen Alltag vor
besondere Herausforderungen stellen. Hierzu gehören Patienten mit atypischer oder
fehlender Klinik, Patienten höheren Alters und Patientinnen. Für diese Gruppen werden
gesonderte Empfehlungen formuliert.
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Affiliation(s)
| | - Frank Noack
- Zentrale Notaufnahme, Universitätsklinikum Halle, Halle
| | - Axel Schlitt
- Fachabteilung Kardiologie/Diabetologie, Paracelsus-Harz-Klinik Bad
Suderode, Bad Suderode
- Medizinische Fakultät, Martin-Luther-Universität Halle-Wittenberg,
Halle
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6
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Hoeffkes D, Welcker K, Hendrix H, Kamlak V, Prisadov G, Noack F, Meyer A. [Health-Related Quality of Life in Patients with Non-Small Cell Lung Cancer before and after Surgery - a Comparison between Thoracotomy and Video-Assisted Thoracoscopic Surgery]. Zentralbl Chir 2019; 145:574-580. [PMID: 31791091 DOI: 10.1055/a-1039-1694] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Abstract
BACKGROUND Earlier studies have proven that in patients with non-small cell lung cancer video-assisted thoracoscopic surgery is functionally superior to thoracotomy in terms of perioperative and postoperative complications. The objective of this work was to determine whether there is a difference in health-related quality of life (HRQoL) of patients with non-small cell lung cancer - compared to the German normal population - before and after surgery. Moreover, HRQoL after thoracotomy was compared to HRQoL after video-assisted thoracoscopic surgery (VATS). MATERIAL AND METHODS Based on retrospective data generated during a 7-year period (2010 - 2017), 327 patients with non-small cell lung cancer who underwent therapy were examined. Patients either underwent thoracotomy or video-assisted thoracoscopic surgery. 456 of short form 12 questionnaires were analysed. Via norm-based scoring, and physical and mental component summaries (PCS and MCS) were calculated before and 6, 12, and 24 months after treatment. Using t tests, potential differences in physical and mental component summaries were evaluated between patients and the German normal population as well as between patients after thoractomy and after VATS. RESULTS Up to 24 months after surgery, the physical dimension of HRQoL is significantly reduced, while the mental component summary does not significantly differ from the German population. Moreover, thoracotomy and VATS gave equivalent values for health-related quality of life. CONCLUSION With respect to health-related quality of life, thoracotomy and video-assisted thorascopic surgery are equivalent in the long term. But there was a trend to improvement with both summary scores that might indicate superiority of video-assisted thoracoscopic surgery.
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Affiliation(s)
- Daniel Hoeffkes
- Klinik für Pneumologie, Kliniken Maria Hilf GmbH Mönchengladbach, Deutschland
| | - Katrin Welcker
- Klinik für Thoraxchirurgie, Kliniken Maria Hilf GmbH Mönchengladbach, Deutschland
| | - Holger Hendrix
- Klinik für Thoraxchirurgie, Kliniken Maria Hilf GmbH Mönchengladbach, Deutschland
| | - Vladimir Kamlak
- Klinik für Thoraxchirurgie, Kliniken Maria Hilf GmbH Mönchengladbach, Deutschland
| | - Georgi Prisadov
- Klinik für Thoraxchirurgie, Kliniken Maria Hilf GmbH Mönchengladbach, Deutschland
| | - Frank Noack
- Klinik für Thoraxchirurgie, Kliniken Maria Hilf GmbH Mönchengladbach, Deutschland
| | - Andreas Meyer
- Klinik für Pneumologie, Kliniken Maria Hilf GmbH Mönchengladbach, Deutschland
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7
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Waßmuth S, Rohe K, Noack F, Noutsias M, Treede H, Schlitt A. Adherence To Lipid-Lowering Therapy In Patients With Coronary Heart Disease From The State Of Saxony-Anhalt, Germany. Vasc Health Risk Manag 2019; 15:477-483. [PMID: 31802881 PMCID: PMC6827502 DOI: 10.2147/vhrm.s197089] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2018] [Accepted: 09/12/2019] [Indexed: 11/24/2022] Open
Abstract
OBJECTIVES Treatment with lipid-lowering therapy (LLT) such as statins, cholesterol absorption inhibitors, or PCSK9 inhibitors is of major importance for the survival of patients with atherosclerotic diseases, and adherence to LLT is essential for treatment success. The intention of this study was to investigate adherence to LLT in patients with coronary heart disease (CHD) in a 12-month follow-up period in Saxony-Anhalt, the state with the highest incidence and mortality for CHD in Germany. PATIENTS AND METHODS Data were taken from 542 hospitalized patients with angiographically documented CHD who were prospectively included in this study conducted in the Department of Medicine III of the University Clinics (Halle). We collected data concerning medication at discharge and after 3 and 12 months. RESULTS A total of 542 patients were included in this study. Mean age was 69.2 ± 11.8 years. In all, 68.8% were males, 165 (30.4%) were smokers, 39.7% suffered from diabetes, and 86.9% had arterial hypertension. The follow-up time of this study was 12 months. At discharge, 463 patients (85.4%) were being treated with a statin. After 3 months 409 (75.5%) and after 12 months, 395 patients (72.9%) were still on statin therapy, respectively. In total treatment, adherence for the statin medication decreased by 15.7% in 12 months. Kaplan-Meier analyses showed that survival, taken as freedom of death from any cause, decreased significantly if statin treatment was stopped (p=0.001). This was confirmed by multivariate Cox regression (HR 1.78, p=0.012). Ezetemibe was prescribed for 56 patients at discharge (10.3%). After 3 months, 40 patients (7.4%) were still taking ezetemibe. After 12 months, adherence to ezetemibe treatment decreased to 4.1% (22 patients). CONCLUSION During follow-up for 3 and 12 months, adherence for statin therapy decreased by 15.7% and for ezetemibe by 46.6%. Here, low adherence to statin therapy was associated with fatal outcome.
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Affiliation(s)
- Stephan Waßmuth
- Department of Medicine III, University Clinic, Halle, Germany
| | - Katharina Rohe
- Department of Medicine III, University Clinic, Halle, Germany
| | - Frank Noack
- Emergency Department and Department of Medicine II, University Clinic, Halle, Germany
| | - Michel Noutsias
- Department of Medicine III, University Clinic, Halle, Germany
| | - Hendrik Treede
- Department of Cardiac Surgery, University Clinic, Halle, Germany
| | - Axel Schlitt
- Paracelsus Harz-Clinic Bad Suderode, Quedlinburg, Germany
- Medical Faculty, Martin Luther-University Halle-Wittenberg, Halle, Germany
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8
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Abstract
Although small bowel involvement by malignant melanoma is most frequently metastatic, a primary origin at this site has been reported in rare cases. The biological and clinical features of these cases have not yet been summarized. Here, another case of small bowel melanoma is described, and a review of the existing literature is given. An 81-year-old man presented with anemia and gastrointestinal bleeding. A tumor of the ileum was detected by video capsule endoscopy and removed by segment resection. Histological examination revealed a malignant melanoma of the ileum. Another primary site could be excluded by clinical and radiographic examination. The patient felt well five months after surgery. Only 18 cases of primary small bowel melanoma (including the present one) have been reported to date. A literature review reveals that this rare neoplasm is associated with a slight predilection for the male gender, a predilection for the ileum and a poor prognosis.
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Affiliation(s)
- Stefan Krüger
- Institute of Pathology, University of Schleswig-Holstein (Campus Lübeck), Germany.
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9
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Klein O, Hanke T, Nebrich G, Yan J, Schubert B, Giavalisco P, Noack F, Thiele H, Mohamed SA. Back Cover: Imaging Mass Spectrometry for Characterization of Atrial Fibrillation Subtypes. Proteomics Clin Appl 2018. [DOI: 10.1002/prca.201870053] [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: 11/08/2022]
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10
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Amoury M, Noack F, Kleeberg K, Stoevesandt D, Lehnigk B, Bethge S, Heinze V, Schlitt A. Prognosis of patients with pulmonary embolism after rehabilitation. Vasc Health Risk Manag 2018; 14:183-187. [PMID: 30214219 PMCID: PMC6121757 DOI: 10.2147/vhrm.s158815] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023] Open
Abstract
INTRODUCTION Pulmonary embolism (PE) is a life-threatening disease; in Germany, therefore, rehabilitation after PE is recommended in patients with intermediate- and high-risk PE. However, no prospective data on PE after inpatient rehabilitation have been published so far. PATIENTS AND METHODS For this monocentric study, 70 patients with PE were prospectively recruited between November 2013 and November 2014 after giving written informed consent. This study was approved by the ethics committee of the Medical Association of Saxony-Anhalt. Inclusion criteria were as follows: age ≥18 years and a stay at the Paracelsus-Harz Clinic in Bad Suderode, Germany, with the main indication of PE. During the hospital stay, history-relevant medical data and diagnostic findings were collected and documented. Furthermore, we recorded whether patients were rehospitalized or died during the treatment period in the rehabilitation clinic or during the 12-month follow-up. RESULTS The mean age was 64.5 ± 13.0 years, the mean body mass index (BMI) was 30.4 ± 6.0 kg/m2, and 54.3% were women. During rehabilitation, two patients (3.9%) were transferred to a primary care hospital; no patient died. However, four patients died (5.7%) in the 12-month follow-up period. A total of 20 patients were hospitalized in the 12-month follow-up period (hospitalization rate during the 12-month follow-up period: 28.6%). Of these 20 patients, one patient was rehospitalized with a newly diagnosed PE (1.4%) and two patients were rehospitalized for bleeding events (2.8%). CONCLUSION PE is a life-threatening disease, and therefore it seems reasonable to recommend rehabilitation at least in patients with an intermediate- or high-risk PE. In this study, death and other serious event rates were low during the in-hospital rehabilitation and in the 12-month follow-up period, which underlined the safety and importance of a standardized rehabilitation program after survived PE.
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Affiliation(s)
- Mroawan Amoury
- Department of Emergency Medicine, University Clinic Halle-Saale, Halle, Germany
| | - Frank Noack
- Department of Emergency Medicine, University Clinic Halle-Saale, Halle, Germany
- Department of Medicine I, University Clinic Halle-Saale, Halle, Germany
| | - Kathleen Kleeberg
- Medical Faculty, Martin Luther-University Halle-Wittenberg, Halle, Germany,
| | - Dietrich Stoevesandt
- Department of Diagnostic Radiology, University Clinic Halle-Saale, Halle, Germany
| | - Burghart Lehnigk
- Department of Cardiology and Pulmology, Paracelsus-Harz Clinic Bad Suderode, Quedlinburg, Germany,
| | - Steffi Bethge
- Department of Cardiology and Pulmology, Paracelsus-Harz Clinic Bad Suderode, Quedlinburg, Germany,
| | - Viktoria Heinze
- Department of Cardiology and Pulmology, Paracelsus-Harz Clinic Bad Suderode, Quedlinburg, Germany,
| | - Axel Schlitt
- Medical Faculty, Martin Luther-University Halle-Wittenberg, Halle, Germany,
- Department of Cardiology and Pulmology, Paracelsus-Harz Clinic Bad Suderode, Quedlinburg, Germany,
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11
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Amoury M, Noack F, Kleeberg K, Stoevesandt D, Lehnigk B, Bethge S, Heinze V, Schlitt A. P1480Progonosis of patients with pulmonary embolism after rehabilition. Eur Heart J 2018. [DOI: 10.1093/eurheartj/ehy565.p1480] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Affiliation(s)
- M Amoury
- University Clinic Halle (Saale), Department of Emergency Medicine, Halle, Germany
| | - F Noack
- University Clinic Halle (Saale), Department of Emergency Medicine, Halle, Germany
| | - K Kleeberg
- Martin Luther University of Halle-Wittenberg, Department of Cardiology, Halle, Germany
| | - D Stoevesandt
- University Clinic Halle (Saale), Department of Diagnostic Radiology, Halle, Germany
| | - B Lehnigk
- Paracelsus-Harz-Clinic Bad Suderode, Quedlinburg, Germany
| | - S Bethge
- Paracelsus-Harz-Clinic Bad Suderode, Quedlinburg, Germany
| | - V Heinze
- Paracelsus-Harz-Clinic Bad Suderode, Quedlinburg, Germany
| | - A Schlitt
- Martin Luther University of Halle-Wittenberg, Department of Cardiology, Halle, Germany
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12
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Klein O, Hanke T, Nebrich G, Yan J, Schubert B, Giavalisco P, Noack F, Thiele H, Mohamed SA. Imaging Mass Spectrometry for Characterization of Atrial Fibrillation Subtypes. Proteomics Clin Appl 2018; 12:e1700155. [DOI: 10.1002/prca.201700155] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2017] [Revised: 04/24/2018] [Indexed: 11/06/2022]
Affiliation(s)
- Oliver Klein
- Charité Universitätsmedizin Berlin, corporate member of Freie Universität Berlin, Humboldt Universität zu Berlin, and; Berlin Institute of Health Berlin-Brandenburg Center for Regenerative Therapies; 13353 Berlin Germany
| | - Thorsten Hanke
- Department of Cardiac and Thoracic Vascular Surgery; University of Luebeck; 23538 Luebeck Germany
| | - Grit Nebrich
- Charité Universitätsmedizin Berlin, corporate member of Freie Universität Berlin, Humboldt Universität zu Berlin, and; Berlin Institute of Health Berlin-Brandenburg Center for Regenerative Therapies; 13353 Berlin Germany
| | - Junfeng Yan
- Department of Cardiac and Thoracic Vascular Surgery; University of Luebeck; 23538 Luebeck Germany
| | - Benedikt Schubert
- Department of Cardiac and Thoracic Vascular Surgery; University of Luebeck; 23538 Luebeck Germany
| | - Patrick Giavalisco
- Experimental Systems Biology; Max Planck Institute of Molecular Plant Physiology; 14476 Golm Germany
| | - Frank Noack
- Institute of Pathology; Martin-Luther Hospital; 14193 Berlin Germany
| | - Herbert Thiele
- Fraunhofer Institute for Medical Image Computing MEVIS; 23538 Luebeck Germany
| | - Salah A. Mohamed
- Department of Cardiac and Thoracic Vascular Surgery; University of Luebeck; 23538 Luebeck Germany
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13
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Noack F, Schmitt M, Bauer J, Helmecke D, Krüger W, Thorban S, Sandherr M, Kuhn W, Graeff H, Harbeck N. A New Approach to Phenotyping Disseminated Tumor Cells: Methodological advances and Clinical Implications. Int J Biol Markers 2018; 15:100-4. [PMID: 10763150 DOI: 10.1177/172460080001500119] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [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: 12/19/2022]
Abstract
At the time of primary therapy (surgery, systemic chemotherapy and/or radiation), disseminated tumor cells in the bone marrow can be found in almost one-third of patients with cancer of the breast, ovary, esophagus, stomach, colon, and other solid tumors. Whereas the prognostic impact of the mere presence of these cells is still a matter of debate, it has been shown that expression of tumor-associated antigens in disseminated tumor cells is linked to more aggressive disease. Therefore, further characterization of disseminated tumor cells at the protein and gene level has become increasingly important. To date, the most common detection method for disseminated tumor cells in the bone marrow is an immunocytochemical approach using cytokeratin-directed antibodies for detection of epithelial cells and the APAAP system for their visualization. We have established a new double immunofluorescence technique enabling simultaneous detection, phenotyping, and antigen quantification of disseminated tumor cells. Mononuclear cells from bone marrow are enriched by Ficoll gradient centrifugation and cytospins are prepared. Double immunofluorescence is performed using antibodies against cytokeratins 8/18/19 (mAb A45B/B3) and the uPA receptor CD87 (pAb HU277). CD87 expression is recorded by confocal laser scanning microscopy (CLSM) using fluorescence labeled latex beads as the reference; staining intensities of all the scans are then summed and quantified (extended focus). This protocol, originally designed for disseminated tumor cells in bone marrow, can also be applied to disseminated tumor cells in blood, to leukapheresis cells or to cells present in malignant ascites or other malignant effusions. The tumor cells detected may be used for gene and mRNA analyses. Furthermore, disseminated tumor cells also represent interesting targets for clinical studies on patient prognosis or prediction of therapy response as well as for specific tumor-biological therapies.
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Affiliation(s)
- F Noack
- Department of Obstetrics and Gynecology, Technical University, Munich
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14
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Meyer A, Noack F, Schaefer WM, Knollmann D. Preoperative assessment of relative pulmonary lobar perfusion fraction in lung cancer patients. Nuklearmedizin 2017; 54:178-82. [DOI: 10.3413/nukmed-0729-15-03] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2015] [Accepted: 05/18/2015] [Indexed: 11/20/2022]
Abstract
SummaryPreoperative quantification of (relative) pulmonary lobar perfusion fraction using scintigraphy is established in predicting lung function after pulmonary surgery. Aim was to develop an easy and truly anatomical method for relative pulmonary lobar perfusion fraction quantification using SPECT/CT and to compare results with those from planar analyses in lung cancer patients. Patients, methods: 36 patients with operable lung cancer, borderline lung function referred to pre-operative quantification. Perfusion SPECT-data were acquired p.i. of 163±9 MBq 99mTc-MAA, subsequent low-dose-CT (SymbiaT, Siemens). Iterative Flash3D-reconstruction, manual 3D segmentation of all lobes using PMOD. VOI transfer to coregistered perfusion SPECTdata, calculation of lobar fractions. Modelbased calculation of relative lobar fractions based on planar data, analysis of planar vs. 3D results using t-test. Results: Significant differences (p<0.05) between the results from 3D method and planar imaging were found for right upper and middle lobe and both lower lobes. Maximum differences ranged from 10.9% (left upper lobe) to 22.9% (right upper lobe). Conclusions: Relative pulmonary lobar perfusion fraction can easily be obtained by an anatomically driven 3D quantification. Results yielded by this method and the traditional planar approach differed greatly, possibly affecting eligibility for lung surgery in individual patients. Considering these results a 3D approach should be used whenever possible.
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15
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Reindl I, Bork I, Lambrecht N, Noack F, Rolke H, Wollschläger B. Systemerkrankung Sarkoidose – über den Tellerrand geschaut. Pneumologie 2017. [DOI: 10.1055/s-0037-1598534] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Affiliation(s)
- I Reindl
- Klinik für Innere Medizin I, Universitätsklinikum Halle
| | - I Bork
- Klinik für Innere Medizin I, Universitätsklinikum Halle
| | - N Lambrecht
- Klinik für Innere Medizin I, Universitätsklinikum Halle
| | - F Noack
- Klinik für Innere Medizin I, Universitätsklinikum Halle
| | - H Rolke
- Klinik für Innere Medizin I, Universitätsklinikum Halle
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16
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Wollschläger B, Bork I, Lambrecht N, Noack F, Reindl I, Rolke H. Infizierte bronchogene Zyste als differentialdiagnostische Herausforderung bei einer 40-jährigen CF-Patientin. Pneumologie 2017. [DOI: 10.1055/s-0037-1598533] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Affiliation(s)
| | - I Bork
- Klinik für Innere Medizin I, Universitätsklinikum Halle
| | - N Lambrecht
- Klinik für Innere Medizin I, Universitätsklinikum Halle
| | - F Noack
- Klinik für Innere Medizin I, Universitätsklinikum Halle
| | - I Reindl
- Klinik für Innere Medizin I, Universitätsklinikum Halle
| | - H Rolke
- Klinik für Innere Medizin I, Universitätsklinikum Halle
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17
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Hermassi S, Hoffmeyer B, Irlenbusch L, Fieseler G, Noack F, Delank KS, Gabbett TJ, Souhaiel Chelly M, Schwesig R. Relationship between the Handball-Specific Complex-Test and Intermittent Field Test performance in professional players. J Sports Med Phys Fitness 2016; 58:8-16. [PMID: 27991484 DOI: 10.23736/s0022-4707.16.06842-0] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
BACKGROUND We investigated the relationship between the Handball Complex-Test (HBCT) and two selected field performance tests (the repeated sprint ability [RSA], and the Yo-Yo Intermittent Recovery Test) in elite handball players. METHODS Nineteen handball players (age: 25.7±5.1 years) were drawn from the First Professional German League. The HBCT consists of four activity series (AS): agility parcours, defensive action, sprint (10 m, 20 m) and throw-on-goal parcours; these activities were completed twice, with five active pauses of 30-35 s, and a follow-up of recovery over the subsequent 10 minutes. The RSA comprised 6 x (15+15 m) sprints starting every 20 s; scoring noted best time (RSAbest), total time (RSATT) and decrement (RSAdec). In the Yo-Yo Intermittent Recover, we recorded the total distance covered (TD). Heart rates (HR) were recorded throughout and recovery was assessed for measurements immediately post-test (R0) and 10 minutes after completing the test (R10). RESULTS A strong correlation was found between HBCT and fastest 10 m and 20 m RSA sprint times (r=0.811, r=0.815, respectively). Also, the HBCT total 10 m and 20 m sprint times showed a strong positive association with RSATT (r=0.70; r=0.63, respectively), and the RSA heart rate post-test was strongly correlated with the HBCT heart rate after round two (r=0.865). CONCLUSIONS Data from the match-specific HBCT Test shows a strong positive association with other more generic intermittent field test measurements. These observations support the validity of using the generic tests to monitor current fitness and responses to training in team handball players.
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Affiliation(s)
- Souhail Hermassi
- Unit of Research, Department of Sport Performance and Health, Higher Institute of Sport and Physical Education "Ksar Saîd", University of "La Manouba", Tunis, Tunisia -
| | - Birgit Hoffmeyer
- Department of Orthopedic Surgery, Otto von Guericke University, Magdeburg, Germany
| | - Lars Irlenbusch
- Department of Orthopedic and Trauma Surgery, Martin Luther University Halle-Wittenberg, Halle, Germany
| | - Georg Fieseler
- Division for Shoulder Surgery and Sports Medicine, Helios Clinic, Warburg, Germany
| | - Frank Noack
- Department of Medicine I, Martin Luther University Halle-Wittenberg, Halle, Germany
| | - Karl-Stefan Delank
- Department of Orthopedic and Trauma Surgery, Martin Luther University Halle-Wittenberg, Halle, Germany
| | - Tim J Gabbett
- Gabbett Performance Solutions, Brisbane, Australia.,Institute for Resilient Regions, University of Southern Queensland, Ipswich, Australia
| | - Mohamed Souhaiel Chelly
- Unit of Research, Department of Sport Performance and Health, Higher Institute of Sport and Physical Education "Ksar Saîd", University of "La Manouba", Tunis, Tunisia
| | - René Schwesig
- Department of Orthopedic and Trauma Surgery, Martin Luther University Halle-Wittenberg, Halle, Germany
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18
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Reindl I, Lambrecht N, Bork I, Röder C, Rolke H, Noack F, Wollschläger B. Suchet, so werdet ihr finden – 2 Fälle von sekundärem Pleuraempyem. Pneumologie 2016; 70:826-830. [DOI: 10.1055/s-0036-1596080] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Affiliation(s)
- I Reindl
- Klinik und Poliklinik für Innere Medizin I, Universitätsklinikum Halle
| | - N Lambrecht
- Klinik und Poliklinik für Innere Medizin I, Universitätsklinikum Halle
| | - I Bork
- Klinik und Poliklinik für Innere Medizin I, Universitätsklinikum Halle
| | - C Röder
- Klinik und Poliklinik für Innere Medizin I, Universitätsklinikum Halle
| | - H Rolke
- Klinik und Poliklinik für Innere Medizin I, Universitätsklinikum Halle
| | - F Noack
- Klinik und Poliklinik für Innere Medizin I, Universitätsklinikum Halle
| | - B Wollschläger
- Klinik und Poliklinik für Innere Medizin I, Universitätsklinikum Halle
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19
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Hendrix H, Kamlak V, Reich L, Prisadov G, Hilgers RD, Behne M, Noack F, Welcker K. Schmerzbehandlung nach Thorakotomie – Ein prospektiver Vergleich von drei etablierten Schmerztherapien. Zentralbl Chir 2016. [DOI: 10.1055/s-0036-1587526] [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: 10/21/2022]
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20
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Agic A, Xu H, Altgassen C, Noack F, Wolfler MM, Diedrich K, Friedrich M, Taylor RN, Hornung D. Relative Expression of 1,25-Dihydroxyvitamin D3 Receptor, Vitamin D 1α-Hydroxylase, Vitamin D 24-Hydroxylase, and Vitamin D 25-Hydroxylase in Endometriosis and Gynecologic Cancers. Reprod Sci 2016; 14:486-97. [PMID: 17913968 DOI: 10.1177/1933719107304565] [Citation(s) in RCA: 99] [Impact Index Per Article: 12.4] [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: 11/15/2022]
Abstract
The authors demonstrate expression of the vitamin D receptor (VDR) and its hydroxylases in the endometrium and ovaries of women with and without endometriosis and endometrial or ovarian cancer. Immunohistochemistry showed strong staining of the VDR in endometriosis and endometrial cancer, with the most intense staining in epithelial cells. The VDR mRNA was significantly increased in patients with endometrial and ovarian cancer compared to the control group. There was a significantly higher 1 alpha-hydroxylase expression in the endometrium of patients with endometriosis compared to healthy controls. The observed differences in VDR and 1 alpha -hydroxylase mRNA levels were maintained at the protein level. The authors found no differences in 25-OH vitamin D levels between the serum of patients with endometriosis (25.7 +/- 2.1 ng/mL, n = 46) and healthy controls (22.6 +/- 2.0 ng/mL, n = 33, P = .31). They hypothesize that vitamin D might influence the local activity of immune cells and cytokines thought to play important pathogenic roles in the development and maintenance of endometriosis.
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Affiliation(s)
- Admir Agic
- Department of Gynecology and Obstetrics, University of Schleswig-Holstein, Lübeck, Germany
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21
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Schwesig R, Hermassi S, Fieseler G, Irlenbusch L, Noack F, Delank KS, Shephard RJ, Chelly MS. Anthropometric and physical performance characteristics of professional handball players: influence of playing position. J Sports Med Phys Fitness 2016; 57:1471-1478. [PMID: 27139799 DOI: 10.23736/s0022-4707.16.06413-6] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
BACKGROUND The aims of the study were to examine the anthropometric and physical performance characteristics of professional handball players classified by playing position. METHODS Twenty-one competitors (age: 25.2±5.1 years) were categorized as backs, pivots, wings or goalkeepers. Measures included anthropometrics (body height and mass), scores on the Yo-Yo Intermittent Recovery Test (total distance covered, TD), repeated-sprint ability (6 repetitions of 2x15-m shuttle sprints with recording of best time for a single trial, RSAbest) and performance on a complex handball test (HBKT) of throw slap (TS) and throw jump (TJ) with and without precision. RESULTS The anthropometric data revealed a significantly lower body height for wings and pivots than for goalkeepers. Wings, pivots and goalkeepers were significantly shorter than backs, but had a similar BMI. The TD was greater for the wings (2.400 m) than for backs (1.832 m) and pivots (2.067m). Wings also achieved a better RSAbest (5.41 s) than backs (5.68 s) or pivots (5.82 s). Body height was significantly related to throw slap (TS) and jump (JT) (r=0.53, P<0.01; r=0.51, P<0.01 respectively). No significant difference (P=0.675; η2=0.009) was seen between JT with precision and JT without precision. CONCLUSIONS Substantial differences of body build and physical performance between playing positions underline the importance of a careful assignment of such positions and the development of position-specific training for professional handball players by modifying both intermittent aerobic and anaerobic endurance components of training sessions.
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Affiliation(s)
- René Schwesig
- Department of Orthopedic and Trauma Surgery, Martin Luther University, Halle-Wittenberg, Germany
| | - Souhail Hermassi
- Unit of Research (UR17JS01) "Sport Performance, Health and Society", Higher Institute of Sport and Physical Education, Ksar Saîd, University of "La Manouba", Tunis, Tunisia -
| | | | - Lars Irlenbusch
- Department of Orthopedic and Trauma Surgery, Martin Luther University, Halle-Wittenberg, Germany
| | - Frank Noack
- Department of Medicine I, Martin Luther University, Halle-Wittenberg, Germany
| | - Karl-Stefan Delank
- Department of Orthopedic and Trauma Surgery, Martin Luther University, Halle-Wittenberg, Germany
| | - Roy J Shephard
- Faculty of Kinesiology and Physical Education, University of Toronto, Toronto, ON, Canada
| | - Mohamed-Souhaiel Chelly
- Unit of Research (UR17JS01) "Sport Performance, Health and Society", Higher Institute of Sport and Physical Education, Ksar Saîd, University of "La Manouba", Tunis, Tunisia
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22
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Schwesig R, Miserius M, Hermassi S, Delank KS, Noack F, Fieseler G. [How Valid is the Performance Diagnostic in Soccer?]. Sportverletz Sportschaden 2016; 30:26-30. [PMID: 26909524 DOI: 10.1055/s-0042-100949] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
Abstract
BACKGROUND Assessments of physical and physiological performance tests in soccer sports are still unspecific yet. There is also a lack of scientific validation using those as a "golden standard". Concerning match performance a large deficit also exist in sports and medical science. OBJECTIVE The aim and purpose of this multicentric and prospective diagnostic study was to evaluate the validity of current established and recommended diagnostic tests for endurance and match performance (golden standard: real time of playing) in soccer. MATERIALS AND METHODS In a prospective study protocol two German soccer teams from the fourth (n = 22) and third (n = 24) national league first underwent different tests of performance and diagnostics ahead of the competition season (tapping, drop jump, counter movement jump, speed dribbling, treadmill running test). Afterwards, match performance of each athlete was assessed by real time of playing (as a surrogate parameter) during the half season (14 and 25 matches). We finally compared test parameters with the match performance in a linear regression analysis. RESULTS Our analysis showed no statistical relevant relationship between test parameters and match performance (r(2) < 0.10). Only the assessment in maximum of relative oxygen uptake during the treadmill test for endurance was associated with a higher amount of variance (12%). CONCLUSIONS According to the study results there is no relevant and valid correlation between current established diagnostic tests in soccer sport and sport-specific performance. The time of real engagement during a match might be associated with a quality of performance for the single athlete. Therefore, the assessment of this match activity is the most important parameter for improving diagnostic tests in soccer. The existence of a "golden standard" is essential for validation of any tests and parameters and the development of new specific assessments. At the moment, physical performance tests have no scientific evidence in soccer sports.
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Affiliation(s)
- R Schwesig
- Martin-Luther-Universität Halle-Wittenberg, Department für Orthopädie, Unfall- und Wiederherstellungschirurgie, Halle/Saale
| | - M Miserius
- Freiberuflicher Athletik- und Personaltrainer, Potsdam
| | - S Hermassi
- Martin-Luther-Universität Halle-Wittenberg, Department für Orthopädie, Unfall- und Wiederherstellungschirurgie, Halle/Saale
| | - K S Delank
- Martin-Luther-Universität Halle-Wittenberg, Department für Orthopädie, Unfall- und Wiederherstellungschirurgie, Halle/Saale
| | - F Noack
- Martin-Luther-Universität Halle-Wittenberg, Universitätsklinik und Poliklinik für Innere Medizin I, Schwerpunkt Pneumologie, Halle/Saale
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23
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Wollschläger B, Bork I, Lambrecht N, Noack F, Reindl I, Röder C, Rolke H, Schmidt B. Mutationsspezifische Therapie der Mukoviszidose mit Ivacaftor – Erfahrungen der CF-Ambulanz Halle mit erwachsenen CF-Patienten. Pneumologie 2016. [DOI: 10.1055/s-0036-1572076] [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: 10/22/2022]
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24
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Ulrich UA, Drienko E, Reichert VM, Wunschel A, Noack F. Malignome auf dem Boden einer Endometriose. Gynäkologische Endokrinologie 2016. [DOI: 10.1007/s10304-015-0043-1] [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: 10/22/2022]
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25
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Trabs P, Noack F, Aleksandrovsky AS, Zaitsev AI, Petrov V. Generation of coherent radiation in the vacuum ultraviolet using randomly quasi-phase-matched strontium tetraborate. Opt Lett 2016; 41:618-621. [PMID: 26907438 DOI: 10.1364/ol.41.000618] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
Tunable coherent radiation is generated in the vacuum ultraviolet down to 121 nm using random quasi-phase matching in strontium tetraborate, the shortest wavelength ever produced with a second-order nonlinear optical process in a solid-state material. Relevant properties of this radiation, the nonlinear process, and the nonlinear crystal are investigated.
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26
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Rigo M, Sklorz JAW, Hatje N, Noack F, Weber M, Wiecko J, Müller C. 2,4,6-Triphenylphosphinine and 2,4,6-triphenylposphabarrelene revisited: synthesis, reactivity and coordination chemistry. Dalton Trans 2016; 45:2218-26. [DOI: 10.1039/c5dt03609g] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Important aspects of the synthesis, reactivity and coordination chemistry of 2,4,6-triphenylphosphinine and 2,4,6-triphenylphosphabarrelene have been revisited.
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Affiliation(s)
- M. Rigo
- Freie Universität Berlin
- Institut für Chemie und Biochemie
- 14195 Berlin
- Germany
| | - J. A. W. Sklorz
- Freie Universität Berlin
- Institut für Chemie und Biochemie
- 14195 Berlin
- Germany
| | - N. Hatje
- Freie Universität Berlin
- Institut für Chemie und Biochemie
- 14195 Berlin
- Germany
| | - F. Noack
- Freie Universität Berlin
- Institut für Chemie und Biochemie
- 14195 Berlin
- Germany
| | - M. Weber
- Freie Universität Berlin
- Institut für Chemie und Biochemie
- 14195 Berlin
- Germany
| | - J. Wiecko
- Freie Universität Berlin
- Institut für Chemie und Biochemie
- 14195 Berlin
- Germany
| | - C. Müller
- Freie Universität Berlin
- Institut für Chemie und Biochemie
- 14195 Berlin
- Germany
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27
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Mero M, Noack F, Bach F, Petrov V, Vrakking MJJ. High-average-power, 50-fs parametric amplifier front-end at 1.55 μm. Opt Express 2015; 23:33157-33163. [PMID: 26831983 DOI: 10.1364/oe.23.033157] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
An average-power-scalable, two-stage optical parametric chirped pulse amplifier is presented providing 90-μJ signal pulses at 1.55 μm and 45-μJ idler pulses at 3.1 μm at a repetition rate of 100 kHz. The signal pulses were recompressible to within a few percent of their ~50-fs Fourier limit in anti-reflection coated fused silica at negligible losses. The overall energy conversion efficiency from the 1030-nm pump to the recompressed signal reached 19%, significantly reducing the cost per watt of pump power compared to similar systems. The two-stage source will serve as the front-end of a three-stage system permitting the development of novel experimental strategies towards laser-based imaging of molecular structures and chemical reactivity.
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Schlitt A, Wischmann P, Wienke A, Hoepfner F, Noack F, Silber RE, Werdan K. Rehabilitation in Patients With Coronary Heart Disease: Participation and Its Effect on Prognosis. Dtsch Arztebl Int 2015; 112:527-34. [PMID: 26334980 PMCID: PMC4980305 DOI: 10.3238/arztebl.2015.0527] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/22/2015] [Revised: 05/05/2015] [Accepted: 05/05/2015] [Indexed: 12/25/2022]
Abstract
BACKGROUND In Germany, rehabilitation is considered to be indicated after an acute hospital stay for the treatment of a severe cardiac condition. In comparative studies, at least 51% of German hospital patients with coronary heart disease (CHD) who were entitled to rehabilitative measures actually took part n rehabilitation. METHODS We examined data on 1910 patients with CHD who took part in two prospective cohort studies at the University Hospital of Halle (Saale) in the years 2007-2011. We contacted these patients again with a questionnaire to determine which ones had undergone rehabilitation. For patients who died before we could contact them, the attempt was made to obtain the dates and causes of death from the local authorities. The primary endpoint of was overall mortality. RESULTS The median duration of follow-up was 136 ± 71 weeks. 727 patients (38.1%) had applied for rehabilitation during their acute hospitalization, but only 552 patients (28.9%) actually underwent it. Patients who did not undergo rehabilitation were older than those who did (68.6 ± 10.3 vs. 64.9 ± 10.5 years) and suffered more commonly from diabetes (41.3% vs. 33.7%; p = 0.002), arterial hypertension (89.2% vs. 85.3%; p = 0.017), and peripheral arterial occlusive disease (15.3% vs. 9.8%; p = 0.002). There were more smokers in the rehabilitation group. Kaplan-Meier analysis and multivariate Cox regression analysis both showed that the patients who underwent rehabilitation had lower mortality (hazard ratio 0.067, 95% confidence interval 0.025-0.180, p < 0.001). CONCLUSION Rehabilitation for cardiac patients was associated with lower mortality. Fewer patients underwent rehabilitation in this study than in other, comparable studies. Those who did not were older and had a greater burden of accompanying disease.
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Affiliation(s)
- Axel Schlitt
- Paracelsus Harz Clinic Bad Suderode, Quedlinburg
- Department of Internal Medicine III, University Hospital of Halle (Saale)
| | - Patricia Wischmann
- Department of Internal Medicine III, University Hospital of Halle (Saale)
| | - Andreas Wienke
- Institute for Medical Epidemiology, Biometrics and Computer Science, Martin-Luther-University Halle-Wittenberg, Halle (Saale)
| | - Florian Hoepfner
- Department of Internal Medicine III, University Hospital of Halle (Saale)
| | - Frank Noack
- Department of Internal Medicine I, University Hospital of Halle (Saale)
| | - Rolf-Edgar Silber
- Department of Cardiac und Thoracic Surgery, University Hospital of Halle (Saale)
| | - Karl Werdan
- Department of Internal Medicine III, University Hospital of Halle (Saale)
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29
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Hendrix H, Kamlak V, Hilgers R, Behne M, Noack F. P-224PAIN THERAPY OF POST-THORACOTOMY PAIN: A PROSPECTIVE COMPARISON OF THREE DIFFERENT ESTABLISHED PAIN THERAPIES. Interact Cardiovasc Thorac Surg 2015. [DOI: 10.1093/icvts/ivv204.224] [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: 11/13/2022] Open
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30
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Noack F, Schmidt B, Amoury M, Stoevesandt D, Gielen S, Pflaumbaum B, Girschick C, Völler H, Schlitt A. Feasibility and safety of rehabilitation after venous thromboembolism. Vasc Health Risk Manag 2015. [PMID: 26203256 PMCID: PMC4508081 DOI: 10.2147/vhrm.s81411] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022] Open
Abstract
BACKGROUND Venous thromboembolism is a life-threatening disease. In survivors, different degrees of functional complaints need to be restored or prevented (eg, post-thrombotic syndrome, pulmonary hypertension). Therefore, rehabilitation after venous thromboembolism is recommended in Germany. However, a structured rehabilitation program has not been defined for this indication. Here, we present the experience of a single rehabilitation center. METHODS Data from consecutive pulmonary embolism (PE) patients who were referred for a 3-week inpatient rehabilitation program from 2006 to 2014 were retrospectively evaluated. RESULTS In all, 422 patients were identified. The mean age was 63.9±13.5 years, the mean body mass index (BMI) was 30.6±6.2 kg/m2, and 51.9% were female. Deep vein thrombosis according to PE was known for 55.5% of all patients. We applied a wide range of therapeutic interventions such as bicycle training with monitored heart rate in 86.7%, respiratory training in 82.5%, aquatic therapy/swimming in 40.1%, and medical training therapy in 14.9% of all patients. Adverse events (AEs) occurred in 57 patients during the 3-week rehabilitation period. The most common AEs were cold (n=6), diarrhea (n=5), and infection of the upper or lower respiratory tract that was treated with antibiotics (n=5). However, three patients under anticoagulation therapy suffered from bleeding, which was clinically relevant in one. Four patients (0.9%) had to be transferred to a primary care hospital for non-PE-associated reasons (acute coronary syndrome, pharyngeal abscess, and acute abdominal problems). No influence of any of the physical activity interventions on the incidence of any AE was found. CONCLUSION Since PE is a life-threatening disease, it seems reasonable to recommend rehabilitation at least in PE patients with an intermediate or high risk. It is shown for the first time in this study that a standard rehabilitation program after PE is safe. However, efficacy and safety in the long term need to be studied prospectively.
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Affiliation(s)
- Frank Noack
- Department of Medicine I, University Clinic Halle (Saale), Halle, Germany ; Department of Emergency Medicine, University Clinic Halle (Saale), Halle, Germany
| | - Bernd Schmidt
- Department of Medicine I, University Clinic Halle (Saale), Halle, Germany
| | - Mroawan Amoury
- Department of Emergency Medicine, University Clinic Halle (Saale), Halle, Germany
| | - Dietrich Stoevesandt
- Department of Diagnostic Radiology, University Clinic Halle (Saale), Halle, Germany
| | - Stephan Gielen
- Department of Medicine III, University Clinic Halle (Saale), Halle, Germany
| | - Birgit Pflaumbaum
- Department of Cardiology and Pulmology, Paracelsus-Harz-Clinic Bad Suderode, Quedlinburg, Germany
| | - Christiane Girschick
- Department of Cardiology and Pulmology, Paracelsus-Harz-Clinic Bad Suderode, Quedlinburg, Germany
| | | | - Axel Schlitt
- Department of Cardiology and Pulmology, Paracelsus-Harz-Clinic Bad Suderode, Quedlinburg, Germany ; Medical Faculty, Martin Luther University Halle, Wittenberg, Germany
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Wege N, Schutkowski A, Boenn M, Bialek J, Schlitt A, Noack F, Grosse I, Stangl GI. Men and women differ in their diurnal expression of monocyte peroxisome proliferator-activated receptor-α in the fed but not in the fasted state. FASEB J 2015; 29:2905-11. [PMID: 25825462 DOI: 10.1096/fj.14-267575] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2014] [Accepted: 03/04/2015] [Indexed: 12/16/2023]
Abstract
Peroxisome proliferator-activated receptor-α (PPARα) plays a pivotal role in regulating metabolic response to fasting and is an inhibitor of inflammatory pathways in immune cells. It represents a therapeutic target for treatment of several diseases, mainly hyperlipidemia. To shed light on PPARα expression changes in response to fasting, young healthy male and female volunteers were fed or fasted for 24 hours. Monocytes were analyzed every 2 hours to compile both profiles of mRNA and protein expression of PPARα and its interactive partner, the circadian pacemaker brain and muscle aryl hydrocarbon receptor nuclear translocator like-1 (BMAL1). We found that women change their diurnal expression profiles of PPARα and BMAL1 when switching from the fed to the fasted state, whereas men do not. Interestingly, the PPARα and BMAL1 profiles of men and women in the fed state are different, whereas the profiles in the fasted state are virtually identical. The finding of diametrically opposite responses of male and female PPARα expression in the fed state might have practical implication in human medicine as PPARα activators like fibrates are used for the therapy of chronic lymphocytic leukemia, microvascular complications in diabetes, and kidney diseases.
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Affiliation(s)
- Nicole Wege
- *Institute of Agricultural and Nutritional Sciences, Institute of Computer Science, and University Clinic Halle (Saale), Martin Luther University Halle-Wittenberg, Halle, Germany; Department of Soil Ecology, UFZ Helmholtz Centre for Environmental Research, Halle, Germany; Paracelsus Harz Clinic Bad Suderode, Quedlinburg, Germany; and German Centre for Integrative Biodiversity Research Halle-Jena-Leipzig, Leipzig, Germany
| | - Alexandra Schutkowski
- *Institute of Agricultural and Nutritional Sciences, Institute of Computer Science, and University Clinic Halle (Saale), Martin Luther University Halle-Wittenberg, Halle, Germany; Department of Soil Ecology, UFZ Helmholtz Centre for Environmental Research, Halle, Germany; Paracelsus Harz Clinic Bad Suderode, Quedlinburg, Germany; and German Centre for Integrative Biodiversity Research Halle-Jena-Leipzig, Leipzig, Germany
| | - Markus Boenn
- *Institute of Agricultural and Nutritional Sciences, Institute of Computer Science, and University Clinic Halle (Saale), Martin Luther University Halle-Wittenberg, Halle, Germany; Department of Soil Ecology, UFZ Helmholtz Centre for Environmental Research, Halle, Germany; Paracelsus Harz Clinic Bad Suderode, Quedlinburg, Germany; and German Centre for Integrative Biodiversity Research Halle-Jena-Leipzig, Leipzig, Germany
| | - Joanna Bialek
- *Institute of Agricultural and Nutritional Sciences, Institute of Computer Science, and University Clinic Halle (Saale), Martin Luther University Halle-Wittenberg, Halle, Germany; Department of Soil Ecology, UFZ Helmholtz Centre for Environmental Research, Halle, Germany; Paracelsus Harz Clinic Bad Suderode, Quedlinburg, Germany; and German Centre for Integrative Biodiversity Research Halle-Jena-Leipzig, Leipzig, Germany
| | - Axel Schlitt
- *Institute of Agricultural and Nutritional Sciences, Institute of Computer Science, and University Clinic Halle (Saale), Martin Luther University Halle-Wittenberg, Halle, Germany; Department of Soil Ecology, UFZ Helmholtz Centre for Environmental Research, Halle, Germany; Paracelsus Harz Clinic Bad Suderode, Quedlinburg, Germany; and German Centre for Integrative Biodiversity Research Halle-Jena-Leipzig, Leipzig, Germany
| | - Frank Noack
- *Institute of Agricultural and Nutritional Sciences, Institute of Computer Science, and University Clinic Halle (Saale), Martin Luther University Halle-Wittenberg, Halle, Germany; Department of Soil Ecology, UFZ Helmholtz Centre for Environmental Research, Halle, Germany; Paracelsus Harz Clinic Bad Suderode, Quedlinburg, Germany; and German Centre for Integrative Biodiversity Research Halle-Jena-Leipzig, Leipzig, Germany
| | - Ivo Grosse
- *Institute of Agricultural and Nutritional Sciences, Institute of Computer Science, and University Clinic Halle (Saale), Martin Luther University Halle-Wittenberg, Halle, Germany; Department of Soil Ecology, UFZ Helmholtz Centre for Environmental Research, Halle, Germany; Paracelsus Harz Clinic Bad Suderode, Quedlinburg, Germany; and German Centre for Integrative Biodiversity Research Halle-Jena-Leipzig, Leipzig, Germany
| | - Gabriele I Stangl
- *Institute of Agricultural and Nutritional Sciences, Institute of Computer Science, and University Clinic Halle (Saale), Martin Luther University Halle-Wittenberg, Halle, Germany; Department of Soil Ecology, UFZ Helmholtz Centre for Environmental Research, Halle, Germany; Paracelsus Harz Clinic Bad Suderode, Quedlinburg, Germany; and German Centre for Integrative Biodiversity Research Halle-Jena-Leipzig, Leipzig, Germany
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Trabs P, Noack F, Aleksandrovsky AS, Zaitsev AI, Radionov NV, Petrov V. Spectral fringes in non-phase-matched SHG and refinement of dispersion relations in the VUV. Opt Express 2015; 23:10091-10096. [PMID: 25969050 DOI: 10.1364/oe.23.010091] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
We consider second harmonic generation (SHG) of ultrashort pulses in the case of strong phase- and group-velocity mismatch. Spectral fringes appear in the second harmonic related to two delayed replicas of the fundamental pulse in the time domain. The fringe separation can be used to evaluate the group-velocity and refractive index of nonlinear crystals at extreme wavelengths. Experimental results with femtosecond pulses in SrB(4)O(7) (SBO) are used to refine the Sellmeier equation describing the n(c) refractive index down to 160 nm, essential for the use of this unique nonlinear crystal for random quasi-phase-matching in the VUV.
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Wollschläger B, Bork I, Franke U, Lambrecht N, Noack F, Reindl I, Röder C, Schmidt B. Destruktion der Trachealwand: Manche Fälle bleiben ungelöst, andere nicht. Pneumologie 2015. [DOI: 10.1055/s-0035-1544751] [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: 10/24/2022]
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Wollschläger B, Bork I, Franke U, Lambrecht N, Noack F, Röder C, Reindl I, Kreft B, Lange D, Schmidt B. Hätten Sie eine pulmonale Tuberkulose erwartet? Rekonstitutionssyndrom im Rahmen einer Miliartuberkulose bei HIV. Pneumologie 2015. [DOI: 10.1055/s-0035-1544798] [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: 10/24/2022]
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Noack F, Schmidt B, Amoury M, Stoevesandt D, Gielen S, Pflaumbaum B, Girschick C, Schlitt A. Patient rehabilitation after pulmonary embolism. Pneumologie 2015. [DOI: 10.1055/s-0034-1396570] [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: 10/24/2022]
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Huttenlocher S, Seibold ND, Gebhard MP, Noack F, Thorns C, Hasselbacher K, Wollenberg B, Schild SE, Rades D. Evaluation of the prognostic role of tumor cell podoplanin expression in locally advanced squamous cell carcinoma of the head and neck. Strahlenther Onkol 2014; 190:1021-7. [PMID: 24928249 DOI: 10.1007/s00066-014-0694-1] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2014] [Accepted: 05/14/2014] [Indexed: 10/25/2022]
Abstract
BACKGROUND AND PURPOSE To investigate the potential prognostic role of tumor cell podoplanin expression in patients treated with resection followed by irradiation or chemoradiotherapy for locally advanced squamous cell carcinoma of the head and neck (SCCHN). MATERIALS AND METHODS Podoplanin expression (≤10 % versus > 10 %) and 12 other factors were evaluated in 160 patients for their association with locoregional control (LRC), metastases-free (MFS) and overall survival (OS). Other factors were age, gender, Eastern Cooperative Oncology Group (ECOG) performance status, preradiotherapy (pre-RT) hemoglobin level, tumor site, histological grading, T category, N category, American Joint Committee on Cancer (AJCC) stage, human papillomavirus (HPV) status, extent of resection and concurrent chemotherapy. RESULTS In multivariate analysis, ECOG performance status 0-1 (risk ratio, RR: 3.01; 95 % confidence interval, CI: 1.42-7.14; p = 0.003), pre-RT hemoglobin levels ≥ 7.45 mmol/l (12 g/dl; RR: 2.03; 95 % CI: 1.04-3.94; p = 0.038), oropharyngeal cancer (RR: 1.25; 95 % CI: 1.01-1.55; p = 0.038) and T category T1-2 (RR: 1.81; 95 % CI: 1.24-2.79; p = 0.002) were significantly associated with improved LRC. T category T1-2 (RR: 1.90; 95 % CI: 1.25-3.06; p = 0.002) and N category N0-2a (RR: 5.22; 95 % CI: 1.96-18.09; p < 0.001) were significantly associated with better MFS. Pre-RT hemoglobin levels ≥ 7.45 mmol/l (RR: 2.44; 95 % CI: 1.27-4.74; p = 0.007), T category T1-2 (RR: 1.97; 95 % CI: 1.36-3.04; p < 0.001) and N category N0-2a (RR: 2.87; 95 % CI: 1.37-6.61; p = 0.005) were significantly associated with improved OS. Podoplanin expression ≤ 10 % showed a trend towards improved OS on both univariate (p = 0.050) and multivariate analysis (RR: 1.86; 95 % CI: 0.96-3.59; p = 0.07). CONCLUSION Treatment outcomes were significantly associated with performance status, pre-RT hemoglobin level, tumor site and tumor stage. Tumor cell expression of podoplanin ≤ 10 % showed a trend towards improved OS when compared to podoplanin expression of > 10 %.
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Affiliation(s)
- Stefan Huttenlocher
- Department of Radiation Oncology, University of Lübeck, Ratzeburger Allee 160, 23538, Lübeck, Germany
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Cruz C, Sebastião PJ, Figueirinhas J, Ribeiro AC, Nguyen HT, Destrade C, Noack F. NMR Study of Molecular Dynamics in a D ho Columnar Mesophase. ACTA ACUST UNITED AC 2014. [DOI: 10.1515/zna-1998-10-1104] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Abstract
In this paper we report the first molecular dynamics study combining fast field-cycling and conven-tional NMR techniques in a thermotropic liquid crystal of discotic molecules exhibiting an ordered columnar hexagonal mesophase. Using the association of these techniques we obtained proton T1 data over a very large domain of Larmor frequencies (ω/2π from 500 Hz to 85 MHz). The proton spin-lattice relaxation results were analysed considering the structure of the mesophase and the types of movements which are expected to influence significantly the relaxation rate, namely local molecu-lar rotational reorientations, inter-columnar self-diffusion and collective movements corresponding to bending and compression of the columns. We verified that these mechanisms dominate the relaxation respectively for high, medium and low Larmor frequencies.
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Affiliation(s)
- C. Cruz
- Centro de Física da Materia Condensada, Av. Prof. Gama Pinto 2, 1699 Lisboa Codex, Portugal
- Instituto Superior Tecnico, Departamento de Física, Av. Rovisco Pais, 1096 Lisboa Codex, Portugal
| | - P. J. Sebastião
- Centro de Física da Materia Condensada, Av. Prof. Gama Pinto 2, 1699 Lisboa Codex, Portugal
- Instituto Superior Tecnico, Departamento de Física, Av. Rovisco Pais, 1096 Lisboa Codex, Portugal
| | - J. Figueirinhas
- Centro de Física da Materia Condensada, Av. Prof. Gama Pinto 2, 1699 Lisboa Codex, Portugal
- Instituto Superior Tecnico, Departamento de Física, Av. Rovisco Pais, 1096 Lisboa Codex, Portugal
| | - A. C. Ribeiro
- Centro de Física da Materia Condensada, Av. Prof. Gama Pinto 2, 1699 Lisboa Codex, Portugal
- Instituto Superior Tecnico, Departamento de Física, Av. Rovisco Pais, 1096 Lisboa Codex, Portugal
| | - H. T. Nguyen
- Centre de Recherche Paul Pascal, Domaine Universitaire, 33405 Talence, France
| | - C. Destrade
- Centre de Recherche Paul Pascal, Domaine Universitaire, 33405 Talence, France
| | - F. Noack
- Physikalisches Institut der Universität Stuttgart, Pfaffenwaldring 57, D-70550 Stuttgart
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Müller-Warmuth W, Steenwinkel RV, Noack F. Dynamic Nuclear Polarization Experiments on 19F in Solutions and their Interpretation by the “Pulse Model” of Molecular Collisions. ACTA ACUST UNITED AC 2014. [DOI: 10.1515/zna-1968-0408] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
The dynamic fluorine polarization by the Overhauser effect has been studied at four different magnetic field values and at various temperatures in several fluorocarbon solutions. The importance of intermolecular contact couplings is very sensitively dependent on the chemical environment of the fluorine nuclei. The experimental data are interpreted in terms of the stochastic “pulse model” of molecular collisions derived in a preceding paper. The parameters of the model, such as the relative contribution of scalar couplings, the shape and the time scale of collision pulses and the correlation times of the molecular motion are given explicitly for six fluorocarbon solutions of free radicals.
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Affiliation(s)
| | | | - F. Noack
- I. Physikalisches Institut der Technischen Hochschule Stuttgart (Germany)
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39
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Noack F, Weithase M, Schütz JV. Kernresonanzuntersuchung der Molekülrotation und Selbstdiffusion in festem Benzol: T1ϱ-Spektroskopie/ Nuclear Magnetic Resonance Investigation of Molecular Rotation and Diffusion in Solid Benzene: T1ϱ-Spectroscopy. ACTA ACUST UNITED AC 2014. [DOI: 10.1515/zna-1975-1233] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Abstract
We have extended previous NMR investigations of the molecular motion in solid benzene to lower proton spin Larmor frequencies using the rotating frame (T1ϱ) technique. The new data show two relaxation mechanisms, namely the well-known rotation of the benzene rings around their sixfold axis and, additionally, the self-diffusion by vacancies. The rotation and diffusion was analyzed by computer optimization of the relaxation models of Haeberlen and Torrey, respectively. The parameters of rotation are essentially consistent with results derived recently from high-frequency T1 measurements. The diffusion parameters are in agreement with preliminary low-frequency T1 measurements, but reveal a dramatic discrepancy by nearly 4 orders of magnitude with respect to tracer experiments of Fox and Sherwood. This behaviour is discussed in terms of correlation effects similar to those observed in plastic and liquid crystals.
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Affiliation(s)
- F. Noack
- Physikalisches Institut der Universität Stuttgart
| | - M. Weithase
- Physikalisches Institut der Universität Stuttgart
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40
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Wendt J, Noack F. Kernresonanzuntersuchung der Molekülrotation in festem Benzol: T1-Spektroskopie / Nuclear Magnetic Resonance Investigation of Molecular Rotation in Solid Benzene: T1-spectroscopy. ACTA ACUST UNITED AC 2014. [DOI: 10.1515/zna-1974-1117] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
We have extended Haeberlen’s and Maier’s NMR investigation of the molecular rotation in solid polycrystalline benzene (C6H6), performed in 1967 in the Larmor frequency range from 88 MHz to 22 MHz, to lower frequencies down to 4.4 MHz. In some cases monocrystalline samples were also studied. The extensive data show that the presently accepted model of purely uncorrected rotations of the benzene molecules around their sixfold axis has to be rejected. Instead, two results found, namely
- a slight increase of the rotational activation energy when approaching the melting point of benzene and
- the width of the T1 relaxation minima as a function of the reciprocal temperature suggest an additional relevance of correlated molecular motions, like e.g. the ‘gear-wheel mechanism’ first proposed by Cox. By appropriate modifications of Haeberlen’s theory, i.e. by assuming a rate equation with temperature dependent activation energy and by emphasizing the effect of simultaneous rotations of neighbouring rings compared with the purely statistical, uncorrelated case, we succeeded to describe the considered T1 measurements quantitatively.
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Affiliation(s)
- J. Wendt
- Institut für Theoretische und Angewandte Physik der Universität Stuttgart
| | - F. Noack
- Physikalisches Institut der Universität Stuttgart
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41
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Hausser R, Maier G, Noack F. Kernmagnetische Messungen von Selbstdiffusions-Koeffizienten in Wasser und Benzol bis zum kritischen Punkt. ACTA ACUST UNITED AC 2014. [DOI: 10.1515/zna-1966-0914] [Citation(s) in RCA: 58] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
The most commonly used nuclear magnetic resonance spin-echo methods for determining selfdiffusion coefficients D are described; some experimental data are presented for protons in water and in benzene from room temperature up to the critical point. The results are interpreted in terms of the free-volume rate theory of MACEDO and LITOVITZ. The D-value of benzene may be described by a single activation energy. Water, however, shows such behavior only at high temperatures, thus demonstrating the strong influence of hydrogen bonding. The STOKES-EINSTEIN relation between diffusion coefficient and viscosity is well satisfied over that part of the temperature range where viscosity values are available.
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Affiliation(s)
- R. Hausser
- I. Physikalisches Institut der Technischen Hochschule Stuttgart
| | - G. Maier
- I. Physikalisches Institut der Technischen Hochschule Stuttgart
| | - F. Noack
- I. Physikalisches Institut der Technischen Hochschule Stuttgart
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42
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Affiliation(s)
- U. Haeberlen
- I. Physikalisches Institut der Technischen Hochschule Stuttgart
| | - R. Hausser
- I. Physikalisches Institut der Technischen Hochschule Stuttgart
| | - F. Noack
- I. Physikalisches Institut der Technischen Hochschule Stuttgart
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Graf V, Noack F, Stohrer M. NMR Investigation of Order Fluctuations, Self-Diffusion and Rotational Motions in the Nematic Liquid Crystal MBBA by T1-Relaxation Spectroscopy. ACTA ACUST UNITED AC 2014. [DOI: 10.1515/zna-1977-0114] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Abstract
We report on measurements of the proton spin T1 relaxation dispersion at various temperatures in the nematic phase of the liquid crystal MBBA in the Larmor frequency range from 2 kHz to 270 MHz, which exceeds previous studies by more than 3 orders of magnitude. The new results cannot be interpreted in terms of either order fluctuations or self-diffusion as recently proposed by Doane et al.1 and Blinc et al.2, respectively. Instead, the dispersion and its temperature dependence indicate the significance of at least three relaxation mechanisms, namely order fluctuations (OF), self-diffusion (SD) and rotation of the molecular ellipsoids about the short axis (R). The combined OF-SD-R model presented in this work allows a quantitative analysis of the experimental findings! The correlation times and activation energies of the three molecular reorientations evaluated from the T1 dispersion by means of a computer optimization procedure are in essential agreement with data provided by other spectroscopic methods [light scattering, tracer technique, dielectric relaxation], but differ from former NMR conclusions.
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Affiliation(s)
- V. Graf
- Physikalisches Institut der Universität Stuttgart
| | - F. Noack
- Physikalisches Institut der Universität Stuttgart
| | - M. Stohrer
- Physikalisches Institut der Universität Stuttgart
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44
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Haeberlen U, Hausser R, Noack F. Kernmagnetische Messungen an einem linearen Polyäthylen I. Spin-Gitter-Relaxationszeit T1 und Linienform1. ACTA ACUST UNITED AC 2014. [DOI: 10.1515/zna-1963-0603] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Die Spin-Gitter-Relaxationszeit T1 und die Form des Kernresonanzsignals der Protonen eines linearen Polyäthylens (Marlex 50, Typ 15) wurden mit einer Impulsapparatur bei 28 MHz zwischen —150°C und + 180°C untersucht. Die Ergebnisse an festem und geschmolzenem Polyäthylen lassen sich durch drei verschiedene Bewegungsformen der Polyäthylen-Moleküle erklären, die mit steigender Temperatur angeregt werden. Die Theorie von SOLOMON 2 wird dazu auf einige anisotrope Bewegungen angewandt.
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Affiliation(s)
- U. Haeberlen
- Aus dem I. Physikalischen Institut der Technischen Hochschule Stuttgart
| | - R. Hausser
- Aus dem I. Physikalischen Institut der Technischen Hochschule Stuttgart
| | - F. Noack
- Aus dem I. Physikalischen Institut der Technischen Hochschule Stuttgart
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Abstract
Abstract
We report on measurements of the Larmor frequency dependence of the proton spin relaxation time T1 in the nematic and isotropic phase of p-azoxyanisole (frequency range: 3.8 kHz ≦ ωL/2 π≦75 MHz) . In both cases our results clearly support the Pincus-Cahane mechanism of spin relaxation by order fluctuations ("ωL−½-law") and exclude the alternative translational diffusion model (“ωL+½-law”). For the isotropic phase it was possible to evaluate the correlation time τ of the liquid crystalline order fluctuations from the observed T1 dispersion. As a function of the deviation ⊿ν=ν-νc from the critical nematic-isotropic transition temperature, νc= (136± 0.5)°C, we found τ=2.71·10-7-⊿ν-0.25s .
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Affiliation(s)
- W. Wölfel
- Physikalisches Institut der Universität Stuttgart
| | - F. Noack
- Physikalisches Institut der Universität Stuttgart
| | - M. Stohrer
- Physikalisches Institut der Universität Stuttgart
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46
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Abstract
The magnetic interaction between the electronic magnetic dipole moment of molecular oxygen dissolved in water and water protons has been investigated by measuring the nuclear magnetic proton relaxation times and their dependence upon oxygen pressure (10–2—200 at), upon the proton LARMOR frequency (0.45 — 160 Mc) and upon temperature (20°C—300°C). The results are interpreted in terms of microscopic correlation times. The dipolar interaction, which is dominant, appears to be modulated in time mainly by the correlation time τS of the 02 electron spin. At 25°C we obtain τS = (1 ± 0.4) · 10-11 sec for the O2 spin correlation time and d= 2.87 ± 0.15 Å for the effective distance of nearest approach between electron and proton spin. The value for the translational correlation time TD > 1.3·10-11 sec at 25°C, somewhat larger than in pure water, might suggest a weak, short-lived bonding between O2 and H2O.
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Affiliation(s)
- R. Hausser
- I. Physikalisches Institut der Technischen Hochschule Stuttgart
| | - F. Noack
- I. Physikalisches Institut der Technischen Hochschule Stuttgart
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47
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Rollmann G, Reinhart KF, Noack F. NMR Pulsed Field Gradient Study of Self-Diffusion in the Isotropic Phase of the Liquid Crystals MBBA and EBBA. ACTA ACUST UNITED AC 2014. [DOI: 10.1515/zna-1979-0806] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Abstract
In refinement of a previous study made by Hayward and Packer, the self-diffusion coefficients D of the nematogen liquid crystals MBBA and EBBA were remeasured in the isotropic phase by means of the NMR pulsed field gradient technique. In particular, the diffusion measurements were made for the first time at different Larmor frequencies. A comparison with results obtained recently on the same samples by NMR T1 relaxation analysis reveals a severe discrepancy. Since the gradient method gives results in essential agreement with optical spectroscopies, the observed discrepancy must be attributed to shortages of the relaxation analysis (incorrect models, insufficient experimental accuracy). It is also shown that D depends more strongly on the molecular weight m than m-1/2 .
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Affiliation(s)
- G. Rollmann
- Physikalisches Institut der Universität Stuttgart
| | | | - F. Noack
- Physikalisches Institut der Universität Stuttgart
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48
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Abstract
Abstract
The frequency dependence of the longitudinal proton spin relaxation time T1 was measured by field-cycling and standard NMR techniques in the nematic, smectic and reentrant nematic mesophases of the reentrant liquid crystal 6OCB-8OCB. The results clearly demonstrate that, in contrast to conclusions reported in the literature, the underlying relaxation mechanisms are the same for the nematic and reentrant nematic order, but different in the nematic and smectic phase. In particular, at low frequencies the nematic and reentrant samples reveal a square-root dispersion profile (T1,~ ν½) characteristic for nematic director fluctuations, whereas the smectic samples show a dissimilar and only very narrow dispersion step. It can be attributed to a linear relaxation time increase (T1 ~ v1) expected for smectic-type order fluctuations. The experimental data are described and discussed in terms of four molecular processes, namely nematic or smectic order fluctuations, self-diffusion, rotational motions, and a resonant proton nitrogen coupling.
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Affiliation(s)
- K. H. Schweikert
- Physikalisches Institut der Universität Stuttgart, Stuttgart, FRG
| | - F. Noack
- Physikalisches Institut der Universität Stuttgart, Stuttgart, FRG
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49
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Struppe J, Noack F, Klose G. NMR Study of Collective Motions and Bending Rigidity in Multilamellar System of Lipid and Surfactant Bilayers. ACTA ACUST UNITED AC 2014. [DOI: 10.1515/zna-1997-1001] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Abstract
The frequency dependence of the longitudinal proton spin relaxation time T1 was measured by field-cycling and standard NMR techniques at different temperatures in the liquid crystalline lamellar phases of bilayer systems, composed of lipids, nonionic surfactants, and lipid-surfactant mixtures. We show by our data analysis, comparing various motional models such as layer undulations (LUs) and relaxation by translational diffusion mediated reorientations (TR), that collective layer undulations with their typical T1~ν behaviour determine the low frequency T1 dispersion in both unoriented and glass plate-oriented bilayer systems. The angular dependence of the T1 dispersion for the oriented bilayer system supports these findings and provides a more critical analysis of the two dimensional self-diffusion than in unoriented samples. The evaluated fitting parameters of the LU model allows, together with the measured second moment of the proton NMR signal for the lipid, calculation of the bending rigidity ϰc for these bilayers at different levels of hydration. The obtained values of ϰc turn out to be too large compared with the literature. However, using recent LU models (B. Halle) which include the obvious couplings between neighbouring bilayers at low Larmor frequencies, the corrected ϰc of the fully hydrated membrane systems are comparable to those obtained from the standard videooptical experiments. Therefore proton spin relaxation measure-ments at low Larmor frequencies with the field-cycling technique are a suitable means to determine the bending rigidity ϰc of model membrane systems at low hydrations and of systems containing surfactants.
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Affiliation(s)
- J. Struppe
- Universität Stuttgart, Physikalisches Institut Teil 4, Pfaffenwaldring 57, D-70550 Stuttgart
| | - F. Noack
- Universität Stuttgart, Physikalisches Institut Teil 4, Pfaffenwaldring 57, D-70550 Stuttgart
| | - G. Klose
- Universität Leipzig, Physikalisches Institut Abteilung BIM, Linnestr. 5, D-04103 Leipzig
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Abstract
Abstract
A proton NMR method is described which enables rotational flow and viscosity measurements of low molecular weight ṉematic ḻiquid c̱rystals (NLC's). This is achieved by an extension of the common NMR field-cycling technique, namely by fast electronic switching of both the external magnetic field direction and strength. In thermodynamic equilibrium, the director of an NLC with positive diamagnetic anisotropy (Δχ > 0) orients parallel to the external magnetic field. Thus a change of this direction causes a reorientation process of the molecules to align to the new equilibrium, which in low viscous systems in contrast to polymer liquid crystals is rather fast and hence requires fast field switching. We have studied systematically this response as a function of the initial field rotation angle 90 relative to the director for some homologous NLC's of the n-alkyl-cyano-biphenyl (nCB) series. It is shown that there exists a critical angle θcr in such a way that for θo < θcr, however (e.g. in the case of 5 CB θcr is ≈ 85 degrees) the viscoelastic behaviour is more complicated because of a coupling between flow and director gradients. The analysis of the alignment process by the changes of the proton line spectra also allows to determine the Leslie viscosities α1, α2, α3, α4 + α5, and the average Frank elastic constant K̄ by a single measurement.
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Affiliation(s)
- H. Gotzig
- Physikalisches Institut der Universität Stuttgart, Pfaflenwaldring 57, D-70550 Stuttgart
| | | | - F. Noack
- Physikalisches Institut der Universität Stuttgart, Pfaflenwaldring 57, D-70550 Stuttgart
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