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Ploetner KO, Al Haddad C, Antoniou C, Frank F, Fu M, Kabel S, Llorca C, Moeckel R, Moreno AT, Pukhova A, Rothfeld R, Shamiyeh M, Straubinger A, Wagner H, Zhang Q. Long-term application potential of urban air mobility complementing public transport: an upper Bavaria example. CEAS Aeronaut J 2020; 11:991-1007. [PMID: 33403052 PMCID: PMC7456445 DOI: 10.1007/s13272-020-00468-5] [Citation(s) in RCA: 35] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/26/2020] [Revised: 06/10/2020] [Accepted: 08/19/2020] [Indexed: 11/27/2022]
Abstract
In this paper, the required models and methods to analyze and quantify the potential demand for urban air mobility (UAM) complementing public transport and possible impacts were defined and applied to the Munich Metropolitan region. An existing agent-based transport model of the study area were used and extended to cover socio-demographic changes up to the year 2030 and intermodal UAM services. An incremental logit model for UAM was derived to simulate demand for this new mode. An airport access model was developed as well. Three different UAM networks with different numbers of vertiports were defined. Sensitivity studies of ticket fare and structure, flying vehicle cruise speed, passenger process times at vertiports and different Urban Air Mobility networks sizes were performed. For the reference case, UAM accounts for a modal share of 0.5%. The absolute UAM demand is concentrated on very short routes; hence, UAM vehicle flight speed variation shows low UAM demand impacts. Kilometer-based fare, number of UAM vehicles per vertiport and passenger process times at vertiports show a significant impact on UAM demand.
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Affiliation(s)
| | | | - C. Antoniou
- Technical University of Munich, Munich, Germany
| | - F. Frank
- University of Applied Sciences Ingolstadt, Ingolstadt, Germany
| | - M. Fu
- Bauhaus Luftfahrt, Taufkirchen, Germany
| | - S. Kabel
- University of Applied Sciences Ingolstadt, Ingolstadt, Germany
| | - C. Llorca
- Technical University of Munich, Munich, Germany
| | - R. Moeckel
- Technical University of Munich, Munich, Germany
| | | | - A. Pukhova
- Technical University of Munich, Munich, Germany
| | | | | | | | - H. Wagner
- University of Applied Sciences Ingolstadt, Ingolstadt, Germany
| | - Q. Zhang
- Technical University of Munich, Munich, Germany
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Wernly B, Eder S, Navarese EP, Marcus F, Lichtenauer M, Datz C, Frank F, Landmesser U, Hoppe UC, Jung C, Lauten A. P3519Transcatheter aortic valves replacement for pure aortic valve regurgitation constitutes a valid option in high risk patients. Eur Heart J 2018. [DOI: 10.1093/eurheartj/ehy563.p3519] [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: 11/13/2022] Open
Affiliation(s)
- B Wernly
- Paracelsus Private Medical University, Salzburg, Austria
| | - S Eder
- Hospital Oberndorf, Internal Medicine, Oberndorf, Austria
| | - E P Navarese
- Inova Heart and Vascular Institute, Interventional Cardiology and Cardiovascular Medicine Research, Falls Church, United States of America
| | - F Marcus
- University Hospital of Jena, Department of Cardiology, Jena, Germany
| | - M Lichtenauer
- Paracelsus Private Medical University, Salzburg, Austria
| | - C Datz
- Hospital Oberndorf, Internal Medicine, Oberndorf, Austria
| | - F Frank
- Charité - Universitätsmedizin Berlin, Department of Cardiology, Berlin, Germany
| | - U Landmesser
- Charité - Universitätsmedizin Berlin, Department of Cardiology, Berlin, Germany
| | - U C Hoppe
- Paracelsus Private Medical University, Salzburg, Austria
| | - C Jung
- University Duesseldorf, Division of Cardiology, Pulmonology, and Vascular Medicine, Duesseldorf, Germany
| | - A Lauten
- Charité - Universitätsmedizin Berlin, Department of Cardiology, Berlin, Germany
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Schuler E, Frank F, Hildebrandt B, Betz B, Strupp C, Rudelius M, Aul C, Schroeder T, Gattermann N, Haas R, Germing U. Myelodysplastic syndromes without peripheral monocytosis but with evidence of marrow monocytosis share clinical and molecular characteristics with CMML. Leuk Res 2017; 65:1-4. [PMID: 29216536 DOI: 10.1016/j.leukres.2017.12.002] [Citation(s) in RCA: 9] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2017] [Revised: 11/27/2017] [Accepted: 12/01/2017] [Indexed: 12/31/2022]
Abstract
MDS patients may present with monocytic marrow proliferation not fulfilling criteria for CMML. We analyzed MDS patients with or without a marrow monocytic proliferation by following up the amount of monocytic proliferation and characterizing their molecular profile. 315 MDS patients of Duesseldorf MDS registry were divided into two groups: A) 183 patients with monocytic esterase positive cells in marrow and monocytes between 101 and 900/μl in blood and B) 132 patients without monocytic esterase positive cells in marrow and monocytes in blood ≤100/μl. Twenty patients of each group were screened with regard to ASXL1, TET2, RUNX1, SETBP1, NRAS, and SRSF2 using Illumina myeloid panel. Group A patients were older, had significantly higher WBC, hemoglobin levels, neutrophils and platelets. CMML evolution rates were 4.9% and 1.5%, respectively (p=n.s.). TET2, NRAS and SRFS2 mutation frequencies were higher in group A and four patients had coexisting TET2 and SRFS2 mutation, which was shown to be characteristic but not specific for CMML. MDS patients with marrow monocytic proliferation have a more CMML-like pheno- and genotype and develop CMML more often. Those patients could potentially be very early stages of CMML or represent a CMML-like myeloid neoplasma with marrow adherence of the monocytic cell population.
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Affiliation(s)
- E Schuler
- Department of Hematology, Oncology and Clinical Immunology, University Hospital Duesseldorf, Heinrich Heine-University, Duesseldorf, Germany.
| | - F Frank
- Department of Hematology, Oncology and Clinical Immunology, University Hospital Duesseldorf, Heinrich Heine-University, Duesseldorf, Germany
| | - B Hildebrandt
- Institute of Human Genetics and Anthropology, Heinrich Heine-University, Duesseldorf, Germany
| | - B Betz
- Institute of Human Genetics and Anthropology, Heinrich Heine-University, Duesseldorf, Germany
| | - C Strupp
- Department of Hematology, Oncology and Clinical Immunology, University Hospital Duesseldorf, Heinrich Heine-University, Duesseldorf, Germany
| | - M Rudelius
- Institute of Pathology, Heinrich Heine-University, Duesseldorf, Germany
| | - C Aul
- Department of Hematology and Oncology, Johannes Hospital Duisburg, Germany
| | - T Schroeder
- Department of Hematology, Oncology and Clinical Immunology, University Hospital Duesseldorf, Heinrich Heine-University, Duesseldorf, Germany
| | - N Gattermann
- Department of Hematology, Oncology and Clinical Immunology, University Hospital Duesseldorf, Heinrich Heine-University, Duesseldorf, Germany
| | - R Haas
- Department of Hematology, Oncology and Clinical Immunology, University Hospital Duesseldorf, Heinrich Heine-University, Duesseldorf, Germany
| | - U Germing
- Department of Hematology, Oncology and Clinical Immunology, University Hospital Duesseldorf, Heinrich Heine-University, Duesseldorf, Germany
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Bok M, Alassia M, Frank F, Vega CG, Wigdorovitz A, Parreño V. Passive immunity to control Bovine coronavirus diarrhea in a dairy herd in Argentina. Rev Argent Microbiol 2017; 50:23-30. [PMID: 28893529 PMCID: PMC7116951 DOI: 10.1016/j.ram.2017.03.007] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [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: 11/08/2016] [Revised: 01/12/2017] [Accepted: 03/27/2017] [Indexed: 01/12/2023] Open
Abstract
Bovine coronavirus (BCoV) is a viral enteric pathogen associated with calf diarrhea worldwide being, in Argentina, mostly detected in dairy husbandry systems. The aim of the present work was to study if maternal IgG1 antibodies (Abs) to BCoV acquired by colostrum intake modulate the development of BCoV infection in calves reared in a dairy farm in Argentina. Thirty Holstein calves were monitored during their first 60 days of age. Animals were classified into two groups depending on their initial BCoV IgG1 Ab titers. The “failure of passive transfer” (FPT) group had significantly lower IgG1 Abs to BCoV than the “acceptable passive transfer” (APT) group of calves (log10 1.98 vs. 3.38 respectively) (p < 0.0001). These differences were also observed when the total protein levels in both groups were compared (p = 0.0081). Moreover, 71% (5/7) of calves from the FPT group showed IgG1 seroconversion to BCoV compared to 29.4% (5/17) of animals from the APT group. Regarding viral circulation, BCoV was detected in 10% (3/30) of all calves and BCoV IgG1 Ab seroconversion was detected in 42% of the total animals showing that almost half of the calves were infected with BCoV. In conclusion, calves with high titers of specific BCoV IgG1 (≥1024) were mostly protected against viral infection, while animals with low titers of IgG1 (<1024) were mostly infected with BCoV. IgG1 Abs from colostrum origin are critical for prevention of BCoV infection.
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Affiliation(s)
- Marina Bok
- Instituto de Virología, CICVyA, Instituto Nacional de Tecnología Agropecuaria (INTA), Los Reseros y Nicolás Repetto S/N, Castelar, 1712 Buenos Aires, Argentina
| | - Martín Alassia
- Departamento de Producción Lechera, Facultad de Ciencias Agrarias, Universidad Nacional del Litoral, Kreder 2805, 3080 Esperanza, Santa Fe, Argentina
| | - Flavia Frank
- AproAgro S.A., Juan V.B. Mitri 55, S2322EGA, Sunchales, Santa Fe, Argentina
| | - Celina G Vega
- Instituto de Virología, CICVyA, Instituto Nacional de Tecnología Agropecuaria (INTA), Los Reseros y Nicolás Repetto S/N, Castelar, 1712 Buenos Aires, Argentina
| | - Andrés Wigdorovitz
- Instituto de Virología, CICVyA, Instituto Nacional de Tecnología Agropecuaria (INTA), Los Reseros y Nicolás Repetto S/N, Castelar, 1712 Buenos Aires, Argentina
| | - Viviana Parreño
- Instituto de Virología, CICVyA, Instituto Nacional de Tecnología Agropecuaria (INTA), Los Reseros y Nicolás Repetto S/N, Castelar, 1712 Buenos Aires, Argentina.
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Schuler E, Frank F, Betz B, Hildebrandt B, Aul C, Strupp C, Schroeder T, Haas R, Germing U. Myelodysplastic Syndromes Showing Slight Monocytic Marrow Proliferation Are Prone to Progress to CMML. Leuk Res 2017. [DOI: 10.1016/s0145-2126(17)30242-4] [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: 11/30/2022]
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Frank F, Maurer F, Pehlke-Milde J, Fleming V. [Dying at Life's Beginning]. Gesundheitswesen 2017; 80:540-544. [PMID: 28129658 DOI: 10.1055/s-0042-116316] [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: 10/20/2022]
Abstract
AIM When parents-to-be are faced with a terminal prenatal diagnosis, they are confronted with the decision either to continue the pregnancy or to terminate it at an advanced stage. This difficult decision is intimately affected by the experience of the inevitability of loss, and ethical dilemmas posed in this usually completely unexpected situation. Studies indicate that perinatal child loss due to lethal foetal anomalies is a major life event and a source of serious psychological issues, which can last for many years after the experience. Moreover, it has been shown that care for bereaved parents, if guided by their needs, can ease their burden, regardless of whether they choose to end or continue the pregnancy. The aim of this study is to inspect current practices of counselling and support of affected families and develop practical guidelines for health and social professionals involved. METHODS A sample of 32 parents in the German-speaking part of Switzerland was investigated between December 2012 and March 2014. Semi-structured problem-centred interviews were conducted, transcribed verbatim and thematically analysed. RESULTS 4 main time periods and 6 themes were identified by participants ranging from diagnosis until birth: "shock", "choices and dilemmas", "taking responsibility", "still being pregnant", "saying goodbye/letting go" and "planning the future". However, findings reflect critical points of care and showed gaps not only between emphasising time periods but also between affected parents' and involved professionals' views. This article reports the findings from the parents. CONCLUSION This study provided new insights into parental responses when they are confronted with a fatal prenatal diagnosis. The results contribute towards rethinking current practices in midwifery and other healthcare during pregnancy, birth and puerperium as well as the palliative care of the child.
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Affiliation(s)
- F Frank
- Zürcher Hochschule für Angewandte Wissenschaften, Gesundheit, Winterthur, Switzerland
| | - F Maurer
- Fachstelle Perinataler Kindstod, Bern, Switzerland
| | - J Pehlke-Milde
- Zürcher Hochschule für Angewandte Wissenschaften, Gesundheit, Winterthur, Switzerland
| | - V Fleming
- Zürcher Hochschule für Angewandte Wissenschaften, Gesundheit, Winterthur, Switzerland
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Schnakenberg R, Weltermann B, Becka D, Althaus A, Frank F, Sönnichsen A, Wilm S, Jendik R, Mauer D, Bleckwenn M. P-41 Doctor´s advice for writing advanced directive and health care proxy – a written survey among family doctors in north rhine westphalia. BMJ Support Palliat Care 2015. [DOI: 10.1136/bmjspcare-2015-000978.171] [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: 11/03/2022]
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Bermejo I, Frank F, Komarahadi F, Albicker J, Ries Z, Kriston L, Härter M. [Transcultural prevention of alcohol-related disorders : effects of a culture- and migration-sensitive approach in elderly migrants with respect to attitudes and behavior: a cluster randomized controlled trial]. Bundesgesundheitsblatt Gesundheitsforschung Gesundheitsschutz 2015; 58:738-48. [PMID: 25963642 DOI: 10.1007/s00103-015-2164-z] [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: 11/30/2022]
Abstract
BACKGROUND For migrants who are older than 50, alcohol frequently becomes a problem. Simultaneously alcohol-related prevention measures only reach this group insufficiently. Therefore, a transcultural concept for preventing alcohol-related disorders in elderly (≥ 45 years) migrants has been developed. METHOD The transcultural concept, which consisted of a prevention event as well as a cultural and language-sensitive information booklet, was evaluated in a cluster-randomized controlled trial (n = 310 immigrants). As a control condition there was a prevention event with materials from Deutsche Hauptstelle für Suchtfragen (German Centre for Addiction Issues). Data were obtained before and after the event, as well as after 6 months. All materials were available both in German and in Russian, Italian, Spanish and Turkish. RESULTS Directly after the event, as well as 6 months thereafter, the transcultural approach was rated significantly better than the general prevention event. 73.4 % of the participants read the cultural and migration-sensitive booklet, whereas only 21.2 % in the control condition (p = 0.0001). Furthermore, significantly more participants of the transcultural approach reported a reduced alcohol consumption (49.4 vs. 16.7 %; p = 0.004) after 6 months. CONCLUSION The consideration of diversity with respect to cultural, migration-related, socio demographic und linguistic aspects improves the effectiveness of prevention measures.
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Affiliation(s)
- Isaac Bermejo
- Universitätsklinik Freiburg, Hauptstr. 4, 79104, Freiburg, Deutschland,
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Fabian L, Sulsen V, Frank F, Cazorla S, Malchiodi E, Martino V, Lizarraga E, Catalán C, Moglioni A, Muschietti L, Finkielsztein L. In silico study of structural and geometrical requirements of natural sesquiterpene lactones with trypanocidal activity. Mini Rev Med Chem 2014; 13:1407-14. [PMID: 23815577 DOI: 10.2174/13895575113139990066] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2012] [Revised: 06/19/2013] [Accepted: 06/22/2013] [Indexed: 11/22/2022]
Abstract
Chagas' disease, caused by the intracellular protozoan Trypanosoma cruzi, is one of the most serious health problems throughout South America. Despite the progress that has been made in the study of its biochemistry and physiology, more efficient chemotherapies to control this parasitic infection are still lacking. In this paper we report the trypanocidal and cytotoxic activities of a series of sesquiterpene lactones, isolated from Asteraceae medicinal plants. The significant trypanocidal activity and high selectivity indexes found for many of the compounds evaluated, prompted us to undertake a quantitative structure-activity relationship study. A model using 3D molecular descriptors allowed us to set up a high correlation of the observed activity and the atomic spatial arrangement of these sesquiterpene lactones closely related to steric parameters.
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Affiliation(s)
| | | | | | | | | | | | | | | | | | | | - L Finkielsztein
- Catedra de Farmacognosia- IQUIMEFA (UBA-CONICET), Facultad de Farmacia y Bioquimica, UBA.
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Nagelmann N, Frank F, Liebsch L, Schubert R, Wirsig M, Schramke S, Schuldenzucker V, Juhas S, Baxa M, Motlik J, Marcegaglia M, Holzner E, Faber C, Reilmann R. C12 Volumetry of Nucleus Caudatus, Lateral Ventricles and Cerebrum of Founder and Second Generation Libechov Transgenic HD Minipigs. Journal of Neurology, Neurosurgery & Psychiatry 2014. [DOI: 10.1136/jnnp-2014-309032.85] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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Frank F, Nagelmann N, Liebsch L, Schubert R, Wirsig M, Schramke S, Schuldenzucker V, Marcegaglia M, Ott S, Holzner E, Faber C, Reilmann R. C14 Striatal Magnetic Resonance Spectroscopy of Transgenic HD Minipigs. Journal of Neurology, Neurosurgery & Psychiatry 2014. [DOI: 10.1136/jnnp-2014-309032.87] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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Schuldenzucker V, Schramke S, Wirsig M, Ott S, Schubert R, Frank F, Marcegaglia M, Holzner E, Reilmann R. C16 Track TGHD Minipig - Assessment of Motor Function. Journal of Neurology, Neurosurgery & Psychiatry 2014. [DOI: 10.1136/jnnp-2014-309032.89] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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Schramke S, Schuldenzucker V, Ott S, Wirsig M, Frank F, Schubert R, Marcegaglia M, Holzner E, Reilmann R. C19 Track Tghd Minipigs - A Discrimination Test As Part Of An Assessment Battery For Tghd Minipigs. Journal of Neurology, Neurosurgery & Psychiatry 2014. [DOI: 10.1136/jnnp-2014-309032.92] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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Wirsig M, Schuldenzucker V, Schramke S, Frank F, Schubert R, Ott S, Marcegaglia M, Holzner E, Reilmann R. C17 Track TGHD Minipig - Startbox back and Forth Test. Journal of Neurology, Neurosurgery & Psychiatry 2014. [DOI: 10.1136/jnnp-2014-309032.90] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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Ott S, Schramke S, Schuldenzucker V, Wirsig M, Schubert R, Frank F, Marcegaglia M, Holzner E, Reilmann R. C18 Track TGHD Minipig - Assessing Resource Holding Potential Behaviour as part of a Battery for Phenotyping TGHD Minipigs. J Neurol Psychiatry 2014. [DOI: 10.1136/jnnp-2014-309032.91] [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: 11/03/2022]
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Schubert R, Frank F, Nagelmann N, Schramke S, Schuldenzucker V, Marcegaglia M, Faber C, Holzner E, Reilmann R. C13 Mr-based Stereotaxic Standard Brain Atlas Of The Lib chov Minipig. Journal of Neurology, Neurosurgery & Psychiatry 2014. [DOI: 10.1136/jnnp-2014-309032.86] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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Fatima B, Boehmer U, Frank F, Foster S. EPA-1000 – No one ever asked about it! barriers in access to mental health services for women accessing treatment from primary care in Karachi. Eur Psychiatry 2014. [DOI: 10.1016/s0924-9338(14)78298-7] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/25/2022] Open
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Affiliation(s)
- F. Frank
- Abteilung für Psychiatrie und Psychotherapie, Universitätsklinikum Freiburg
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Bermejo I, Frank F. Zugänge zur transkulturellen Prävention alkoholbezogener Störungen bei älteren Personen mit Migrationshintergrund. Gesundheitswesen 2013; 77 Suppl 1:S37-8. [DOI: 10.1055/s-0032-1329996] [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: 10/27/2022]
Affiliation(s)
| | - F. Frank
- Abteilung für Psychiatrie und Psychotherapie, Universitätsklinikum Freiburg
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Frank F, Arrell C, Witting T, Okell WA, McKenna J, Robinson JS, Haworth CA, Austin D, Teng H, Walmsley IA, Marangos JP, Tisch JWG. Invited review article: technology for attosecond science. Rev Sci Instrum 2012; 83:071101. [PMID: 22852664 DOI: 10.1063/1.4731658] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/04/2023]
Abstract
We describe a complete technological system at Imperial College London for Attosecond Science studies. The system comprises a few-cycle, carrier envelope phase stabilized laser source which delivers sub 4 fs pulses to a vibration-isolated attosecond vacuum beamline. The beamline is used for the generation of isolated attosecond pulses in the extreme ultraviolet (XUV) at kilohertz repetition rates through laser-driven high harmonic generation in gas targets. The beamline incorporates: interferometers for producing pulse sequences for pump-probe studies; the facility to spectrally and spatially filter the harmonic radiation; an in-line spatially resolving XUV spectrometer; and a photoelectron spectroscopy chamber in which attosecond streaking is used to characterize the attosecond pulses. We discuss the technology and techniques behind the development of our complete system and summarize its performance. This versatile apparatus has enabled a number of new experimental investigations which we briefly describe.
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Affiliation(s)
- F Frank
- Department of Physics, The Blackett Laboratory, Imperial College, London SW7 2AZ, United Kingdom.
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Ganeev RA, Hutchison C, Zaïr A, Witting T, Frank F, Okell WA, Tisch JWG, Marangos JP. Enhancement of high harmonics from plasmas using two-color pump and chirp variation of 1 kHz Ti:sapphire laser pulses. Opt Express 2012; 20:90-100. [PMID: 22274332 DOI: 10.1364/oe.20.000090] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
We have investigated resonance effects in high-order harmonic generation (HHG) within laser-produced plasmas. We demonstrate a significantly improved harmonic yield by using two-color pump-induced enhancement and a 1 kHz pulse repetition rate. Together with an increased HHG output, the even harmonics in the cutoff region were enhanced with respect to odd harmonics. We report the observation of a resonance-induced growth in intensity of 20th harmonic in silver plasma (2×), 26th harmonic in vanadium plasma (4×), and 28th harmonic in chromium plasma (5×).
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Affiliation(s)
- R A Ganeev
- Blackett Laboratory, Imperial College London, London SW7 2BW, UK.
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Bermejo I, Frank F. P-423 - Health care utilisation of migrants with mental disorders compared with germans. Eur Psychiatry 2012. [DOI: 10.1016/s0924-9338(12)74590-x] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/28/2022] Open
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Piech C, Joly P, Favre E, Favre J, Plesse J, Biard B, Dubois C, Marchesseau A, Roger H, Fouilloux B, Fournier A, Garcier F, Antoniotti O, Joubert J, Frank F, Gentil-Perret A, Godard W, Soulier K, D’Incan M. Les pemphigoïdes bulleuses suivies en ville et à l’hôpital sont-elles comparables ? Ann Dermatol Venereol 2011. [DOI: 10.1016/j.annder.2011.09.059] [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: 11/28/2022]
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Charlé KP, Frank F, Schulze W. The Optical Properties of Silver Microcrystallites in Dependence on Size and the Influence of the Matrix Environment. ACTA ACUST UNITED AC 2010. [DOI: 10.1002/bbpc.19840880407] [Citation(s) in RCA: 134] [Impact Index Per Article: 9.6] [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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Schulze W, Frank F, Charlé KP, Tesche B. The Preparation of Metal Clusters and Molecules by Means of the Gas Aggregation Technique. ACTA ACUST UNITED AC 2010. [DOI: 10.1002/bbpc.19840880320] [Citation(s) in RCA: 39] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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Cadoche L, Tomatis J, Frank F. Aprendizaje Cooperativo y Evaluación de Habilidades Sociales. FAVE Cs Vet 2007. [DOI: 10.14409/favecv.v6i1/2.1442] [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: 11/05/2022] Open
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Viglizzo EF, Frank F, Bernardos J, Buschiazzo DE, Cabo S. A rapid method for assessing the environmental performance of commercial farms in the Pampas of Argentina. Environ Monit Assess 2006; 117:109-34. [PMID: 16917702 DOI: 10.1007/s10661-006-7981-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/25/2004] [Accepted: 05/25/2005] [Indexed: 05/11/2023]
Abstract
The generation of reliable updated information is critical to support the harmonization of socio-economic and environmental issues in a context of sustainable development. The agro-environmental assessment and management of agricultural systems often relies on indicators that are necessary to make sound decisions. This work aims to provide an approach to (a) assess the environmental performance of commercial farms in the Pampas of Argentina, and (b) propose a methodological framework to calculate environmental indicators that can rapidly be applied to practical farming. 120 commercial farms scattered across the Pampas were analyzed in this study during 2002 and 2003. Eleven basic indicators were identified and calculation methods described. Such indicators were fossil energy (FE) use, FE use efficiency, nitrogen (N) balance, phosphorus (P) balance, N contamination risk, P contamination risk, pesticide contamination risk, soil erosion risk, habitat intervention, changes in soil carbon stock, and balance of greenhouse gases. A model named Agro-Eco-Index was developed on a Microsoft-Excel support to incorporate on-farm collected data and facilitate the calculation of indicators by users. Different procedures were applied to validate the model and present the results to the users. Regression models (based on linear and non-linear models) were used to validate the comparative performance of the study farms across the Pampas. An environmental dashboard was provided to represent in a graphical way the behavior of farms. The method provides a tool to discriminate environmentally friendly farms from those that do not pay enough attention to environmental issues. Our procedure might be useful for implementing an ecological certification system to reward a good environmental behavior in society (e.g., through tax benefits) and generate a commercial advantage (e.g., through the allocation of green labels) for committed farmers.
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Affiliation(s)
- E F Viglizzo
- INTA Centro Regional La Pampa, La Pampa, Argentina.
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Sagan S, Lequin O, Frank F, Convert O, Ayoub M, Lavielle S, Chassaing G. Calpha methylation in molecular recognition. Application to substance P and the two neurokinin-1 receptor binding sites. ACTA ACUST UNITED AC 2001; 268:2997-3005. [PMID: 11358518 DOI: 10.1046/j.1432-1327.2001.02192.x] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
Two binding sites NK-1M (major, more abundant) and NK-1m (minor) are associated with the neurokinin-1 receptor. For the first time with a bioactive peptide, the Calpha methylation constraint, shown to be a helix stabiliser in model peptides, was systematically used to probe the molecular requirements of NK-1M and NK-1m binding sites and the previously postulated bioactive helical conformation of substance P (SP). Seven Calpha methylated analogues of the undecapeptide SP (from position 5-11) have been assayed for their affinities and their potencies to stimulate second messenger production. The consequences of Calpha methylation on the structure of SP have been analysed by circular dichroism and nuclear magnetic resonance combined with restrained molecular dynamics. The decreased potencies of six out of these seven Calpha methylated SP analogues do not allow the identification of any clear-cut differences in the structural requirements between the two binding sites. Strikingly, the most active analogue, [alphaMeMet5]SP, leads to variable subnanomolar affinity and potency when interacting with the NK-1m binding site. The conformational analyses show that the structural consequences associated with Calpha methylation of SP are sequence dependent. Moreover, a single Calpha methylation is not sufficient by itself to drastically stabilize a helical structure even pre-existing in solution, except when Gly9 is substituted by an alpha-aminoisobutyric acid. Furthermore, Calpha methylation of residues 5 and 6 of SP in the middle of the postulated helix does not stabilize, but decreases (to different extents) the stability of the helical structure previously observed in the 4-8 domain of other potent SP analogues.
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Affiliation(s)
- S Sagan
- Laboratoire de Chimie Organique Biologique and Laboratoire de Chimie Structurale Organique et Biologique, Université Pierre et Marie Curie, Paris, France.
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Abstract
BACKGROUND Helicobacter pylori is associated with chronic gastritis and peptic ulcer in adults and in children. The purpose of the present study was to analyze the association of recurrent abdominal pain and H. pylori infection in children and to evaluate the efficacy of antimicrobial treatment in patients with evidence of infection. METHODS The clinical and histopathologic findings in children who underwent diagnostic upper endoscopy for recurrent abdominal pain were analyzed retrospectively. Patients with evidence of infection with H. pylori were treated with a combination of omeprazole, amoxicillin, and clarithromycin. Efficacy of treatment was assessed using the 13C-urea-breath test. RESULTS H. pylori was found in histopathologic sections of 29 (40%) of 73 patients undergoing diagnostic endoscopy for recurrent abdominal pain. Five children (17%) were of Swiss ethnic origin, and 24 (83%) were non-Swiss. All the infected patients had chronic gastritis and 4 (14%) had ulcerations in the duodenum. Treatment with omeprazole, amoxicillin, and clarithromycin resulted in eradication of the infection in all and in resolution of the clinical symptoms in 15 (80%) of 19 patients who had a follow-up examination. CONCLUSIONS The presented data suggest that gastritis induced by H. pylori may be associated with recurrent abdominal pain and that in Switzerland infections with H. pylori primarily involve persons who are non-Swiss. A combined therapy results in eradication of the bacterium and in improvement of the clinical symptoms in a significant majority of the patients.
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Affiliation(s)
- F Frank
- Department of Pediatric Gastroenterology and Nutrition, University Children's Hospital, Zürich, Switzerland
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31
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Abstract
Five subfractions were collected from six term placentas by mincing and differential centrifugation: homogenate, nuclear, mitochondrial, lysosomal, and supernatant. The effect of each subfraction on Trypanosoma cruzi was assessed by trypan blue exclusion, relative infectivity of mice, and penetration of susceptible cultured VERO cells. Ultrastructural changes in trypomastigotes were identified after high cell mortality was shown by dye exclusion following treatment with lysosomal and supernatant fractions. Trypomastigotes treated with other subfractions or preheated subfractions, those recovered from infected VERO cells, and controls remained unaffected. This was confirmed by the ability of treated trypomastigotes to infect mice or to penetrate susceptible cultured VERO cells. There were a 48% decrease in parasitemia and fewer myocardial lesions in Balb/c mice following treatment with the lysosomal subfraction compared to homogenate and controls. VERO cells were invaded about half as often after lysosomal treatment compared to controls (P < 0. 05); an 11% decrease in cell invasion following homogenate treatment was not significant. Placental lysosomal enzyme activity was unaffected by trypomastigotes. Human placentas contain one or more heat-labile substances in lysosomal and supernatant subfractions which inhibit or injure trypomastigotes of T. cruzi in cell-free systems.
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Affiliation(s)
- F Frank
- Cát. Histología y Embriología, Fac. Cs. Médicas, Universidad Nacional de Córdoba, Ciudad Universitaria, Córdoba, 5016, Argentina
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Roncaroli F, Poppi M, Riccioni L, Frank F. Primary non-Hodgkin's lymphoma of the sciatic nerve followed by localization in the central nervous system: case report and review of the literature. Neurosurgery 1997; 40:618-21; discussion 621-2. [PMID: 9055305 DOI: 10.1097/00006123-199703000-00038] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.5] [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: 02/03/2023] Open
Abstract
OBJECTIVE AND IMPORTANCE A unique case of primary non-Hodgkin's lymphoma of the sciatic nerve followed by multiple loci in the central nervous system is described. CLINICAL PRESENTATION The lesion occurred in a 44-year-old immunocompetent man with a palpable mass in the left popliteal fossa and a 10-month history of progressive weakness and numbness of the left foot. The tumor was a diffuse large lymphoma of B-cell origin of an intermediate grade of malignancy according to the criteria of the International Working Formulation. INTERVENTION Because diagnosis of the malignant lymphoma was performed on frozen section, resection of the nerve trunk was avoided. The patient was treated with radiotherapy and chemotherapy. At 6 months after the discovery, biopsy, and treatment of the sciatic nerve lymphoma, other lesions demonstrating the same histological features were observed in the central nervous system. The patient died 4 years and 2 months after presentation as a result of the central nervous system lesions and without clinical evidence of systemic extraneural localization. CONCLUSION A review of the literature indicates that primary peripheral nerve lymphomas occur in the sciatic nerve. These cases, and the case described in our study, share common clinicopathological findings that justify discussing them separately as distinct entities.
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MESH Headings
- Adult
- Biomarkers, Tumor/analysis
- Brain/pathology
- Brain/surgery
- Brain Neoplasms/pathology
- Brain Neoplasms/surgery
- Combined Modality Therapy
- Humans
- Immunoenzyme Techniques
- Lymphoma, B-Cell/pathology
- Lymphoma, B-Cell/surgery
- Lymphoma, Large B-Cell, Diffuse/pathology
- Lymphoma, Large B-Cell, Diffuse/surgery
- Magnetic Resonance Imaging
- Male
- Neoplasms, Multiple Primary/pathology
- Neoplasms, Multiple Primary/surgery
- Peripheral Nervous System Neoplasms/pathology
- Peripheral Nervous System Neoplasms/surgery
- Sciatic Nerve/pathology
- Sciatic Nerve/surgery
- Tomography, X-Ray Computed
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Affiliation(s)
- F Roncaroli
- Department of Clinical Radiology and Anatomic Pathology, University of Bologna, Italy
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Abstract
Genotyping and antibiotic susceptibility testing were used to analyze Pseudomonas aeruginosa and Burkholderia cepacia strains from sink drain from 14 pediatric patients with cystic fibrosis (CF) and from hospital personnel as part of a 4 week prospective study of strain transmission in a pediatric ward. A total of 87.5% of all washbasin drains were contaminated with P. aeruginosa [10(2) to 10(5) colony forming units (CFU)/ml sink fluid], whereas B. cepacia was found only once in a sink drain. From the eight CF patients already infected with P. aeruginosa upon entering the ward, we isolated six genotypes that were identical with strains found in sink drains of the ward. Four of the 16 members of the personnel had one positive P. aeruginosa hand culture. B. cepacia was never found in patients or on personnel hands. Hand washing in contaminated sinks (> or = 10(3) CFU/ml) led to positive P. aeruginosa or B. cepacia hand cultures. P. aeruginosa or B. cepacia embedded in sputum were transmissable by hand shaking for up to 180 min, whereas both pathogens suspended in physiological saline were transmissable to other hands only up to 30 min. Genotyping of P. aeruginosa revealed strain transmission from CF patients or the environment to other patients or the personnel, as well as one transmission from the environment to a CF patient. The ability of CF sputum to prolong survival of P. aeruginosa and B. cepacia may be important for strain transmission. The results suggest that improved hygienic measures are required to prevent routes of bacterial transmission via the hands and sink drains.
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Affiliation(s)
- G Döring
- Department of General and Environmental Hygiene, University of Tübingen, Federal Republic of Germany
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Wrbitzky R, Göen T, Letzel S, Frank F, Angerer J. Internal exposure of waste incineration workers to organic and inorganic substances. Int Arch Occup Environ Health 1996; 68:13-21. [PMID: 8847108 DOI: 10.1007/bf01831628] [Citation(s) in RCA: 23] [Impact Index Per Article: 0.8] [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: 02/02/2023]
Abstract
One hundred and twenty-two persons employed in an industrial waste incineration plant were examined with respect to organic and inorganic substances which may be produced during the combustion of different waste. The employees were divided into three groups: persons with contact with the incinerator (WI workers, n = 45), periphery workers (n = 54) and management (n = 23). For the evaluation of internal exposure, the levels of lead, cadmium, mercury, benzene, toluene, ethylbenzene and m-xylene in blood, chromium in the erythrocytes, polychlorinated biphenyls, hexachlorobenzene and pentachlorophenol in plasma, and arsenic, chromium, nickel, vanadium, chlorophenols and hydroxypyrene in urine were determined. The internal exposures of the three groups were tested against each other and were compared with the reference values of the general population. Differences between the groups investigated were tested using the U test according to Wilcoxon, Mann and Whitney (P < 0.05). The biological exposure limits valid in Germany (BAT values) were not exceeded in any cases. Compared with the background levels of the German population, certain parameters were exceeded in several employees. Significantly higher levels of the WI workers in comparison to both periphery workers and management were found for toluene in blood (median: 1.1 vs 0.9 vs 0.6 microgram/l). For the lead and cadmium levels in blood and for the urinary excretion of arsenic, 2,4-dichlorophenol and tetrachlorophenols, statistical differences were found only between WI workers and one of the other groups. However, in all cases the elevations were very small and of interest more from the environmental than from the occupational point of view. It must be stressed that this waste incineration plant is very modern in terms of worker health and safety. At older plants without corresponding health and safety measures, higher internal exposure of the employees to hazardous substances may exist.
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Affiliation(s)
- R Wrbitzky
- Institute and Clinic of Occupational, Social and Environmental Medicine, University of Erlangen-Nuremberg, Germany
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35
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Abstract
Genotyping and antibiotic susceptibility testing were used to analyze Pseudomonas aeruginosa and Burkholderia cepacia strains from sink drain from 14 pediatric patients with cystic fibrosis (CF) and from hospital personnel as part of a 4 week prospective study of strain transmission in a pediatric ward. A total of 87.5% of all washbasin drains were contaminated with P. aeruginosa [10(2) to 10(5) colony forming units (CFU)/ml sink fluid], whereas B. cepacia was found only once in a sink drain. From the eight CF patients already infected with P. aeruginosa upon entering the ward, we isolated six genotypes that were identical with strains found in sink drains of the ward. Four of the 16 members of the personnel had one positive P. aeruginosa hand culture. B. cepacia was never found in patients or on personnel hands. Hand washing in contaminated sinks (> or = 10(3) CFU/ml) led to positive P. aeruginosa or B. cepacia hand cultures. P. aeruginosa or B. cepacia embedded in sputum were transmissable by hand shaking for up to 180 min, whereas both pathogens suspended in physiological saline were transmissable to other hands only up to 30 min. Genotyping of P. aeruginosa revealed strain transmission from CF patients or the environment to other patients or the personnel, as well as one transmission from the environment to a CF patient. The ability of CF sputum to prolong survival of P. aeruginosa and B. cepacia may be important for strain transmission. The results suggest that improved hygienic measures are required to prevent routes of bacterial transmission via the hands and sink drains.
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Affiliation(s)
- G Döring
- Department of General and Environmental Hygiene, University of Tübingen, Federal Republic of Germany
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36
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Döring G, Frank F, Boudier C, Herbert S, Fleischer B, Bellon G. Cleavage of lymphocyte surface antigens CD2, CD4, and CD8 by polymorphonuclear leukocyte elastase and cathepsin G in patients with cystic fibrosis. J Immunol 1995; 154:4842-50. [PMID: 7722333] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Abstract
Polymorphonuclear leukocytes (PMN) accumulating in airways of patients with cystic fibrosis (CF) as a response to chronic endobronchial bacterial lung infection, release lysosomal serine proteinases such as PMN-elastase at concentrations of approximately 0.5 microM to 5 microM into the airway lumen. Immunohistology of CF lung material and fluorescence activated cell sorter analysis of sequential CF bronchoalveolar lavages demonstrated loss of the CD4 and CD8 Ag on CD3+ T lymphocytes in sputum-filled airways. In 10 CF sputum samples 1.0%, 19.1%, and 15.7% of all CD3+ T lymphocytes expressed CD4, CD8, and CD2, respectively. Incubation of CF sputum supernatant fluids with peripheral blood T lymphocytes resulted in total reduction of CD4 and CD8 but not CD2. Addition of alpha 1-proteinase inhibitor abolished surface Ag cleavage completely. Purified PMN-elastase and cathepsin G cleaved CD2, CD4, and CD8 on peripheral blood T lymphocytes at proteinase concentrations of 0.83 to 8.3 microM in a dose-dependent manner. Cleaved CD4 and CD8 were reexpressed on the surface of T lymphocytes after 24 h in the absence of PMN-elastase. Incubation of a CD4+ T cell clone with PMN-elastase lead to a significant reduction of cytotoxicity toward target cells and significantly reduced IL-2 and IL-4 production. The results suggest a temporary functional impairment of T lymphocytes in foci of high inflammation characterized by stimulated PMN, which may lower tissue destruction.
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Affiliation(s)
- G Döring
- Pediatric Service, Central Hospital Lyon-Sud, Pierre-Bénite, France
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Döring G, Frank F, Boudier C, Herbert S, Fleischer B, Bellon G. Cleavage of lymphocyte surface antigens CD2, CD4, and CD8 by polymorphonuclear leukocyte elastase and cathepsin G in patients with cystic fibrosis. The Journal of Immunology 1995. [DOI: 10.4049/jimmunol.154.9.4842] [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] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
Abstract
Polymorphonuclear leukocytes (PMN) accumulating in airways of patients with cystic fibrosis (CF) as a response to chronic endobronchial bacterial lung infection, release lysosomal serine proteinases such as PMN-elastase at concentrations of approximately 0.5 microM to 5 microM into the airway lumen. Immunohistology of CF lung material and fluorescence activated cell sorter analysis of sequential CF bronchoalveolar lavages demonstrated loss of the CD4 and CD8 Ag on CD3+ T lymphocytes in sputum-filled airways. In 10 CF sputum samples 1.0%, 19.1%, and 15.7% of all CD3+ T lymphocytes expressed CD4, CD8, and CD2, respectively. Incubation of CF sputum supernatant fluids with peripheral blood T lymphocytes resulted in total reduction of CD4 and CD8 but not CD2. Addition of alpha 1-proteinase inhibitor abolished surface Ag cleavage completely. Purified PMN-elastase and cathepsin G cleaved CD2, CD4, and CD8 on peripheral blood T lymphocytes at proteinase concentrations of 0.83 to 8.3 microM in a dose-dependent manner. Cleaved CD4 and CD8 were reexpressed on the surface of T lymphocytes after 24 h in the absence of PMN-elastase. Incubation of a CD4+ T cell clone with PMN-elastase lead to a significant reduction of cytotoxicity toward target cells and significantly reduced IL-2 and IL-4 production. The results suggest a temporary functional impairment of T lymphocytes in foci of high inflammation characterized by stimulated PMN, which may lower tissue destruction.
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Affiliation(s)
- G Döring
- Pediatric Service, Central Hospital Lyon-Sud, Pierre-Bénite, France
| | - F Frank
- Pediatric Service, Central Hospital Lyon-Sud, Pierre-Bénite, France
| | - C Boudier
- Pediatric Service, Central Hospital Lyon-Sud, Pierre-Bénite, France
| | - S Herbert
- Pediatric Service, Central Hospital Lyon-Sud, Pierre-Bénite, France
| | - B Fleischer
- Pediatric Service, Central Hospital Lyon-Sud, Pierre-Bénite, France
| | - G Bellon
- Pediatric Service, Central Hospital Lyon-Sud, Pierre-Bénite, France
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Abstract
The authors present a series of 47 patients with craniopharyngiomas treated by stereotaxy in the past 15 years. There was no mortality nor immediate postoperative morbidity in the treatment of the cystic portion of the neoplasm. Intracavitary colloidal yttrium (90Y) was extremely effective in obtaining long-lasting disappearance of craniopharyngioma cysts. In children, yttrium worsened panhypopituitarism, while it was well tolerated by teenagers and adults. Craniopharyngiomas are often mixed (solid-cystic) and the majority of cases have a predominant cystic portion, where stereotaxy is a valid alternative to open surgery, which presents a high morbidity and mortality.
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Affiliation(s)
- F Frank
- Department of Neurosurgery, Bellaria Hospital, Bologna, Italy
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Abstract
Cavernous angiomas are vascular malformations affecting any part of the central nervous system (CNS). The management of asymptomatic cavernous angiomas is still debated due to their poorly understood natural history, although more data are now available regarding results of surgical treatment in symptomatic cases. The authors report their surgical experience with 18 pediatric patients operated on for symptomatic CNS cavernous angiomas. The children ranged in age from 10 months to 17 years, without a relevant sex difference. Cavernous angiomas were intracranial in 17 cases: 15 being in the supratentorial compartments and two in the cerebellum. Clinical manifestations were as follows: seizures in 11 cases, focal neurologic deficits in five, and headache in one. The 18th case was observed in a girl showing paraparesis in the spinal subdural-extramedullary space at T8-T9 level. Excision of four deep cerebral lesions was performed after stereotactic localization through non-eloquent cortex. Pathologic confirmation of cavernous angiomas was obtained in all patients. Mortality from surgical procedures was absent in this series. The follow-up period ranged from 1 to 16 years. All 11 epileptic patients obtained seizure control; improvement or stabilization of neurologic symptoms was observed in the remaining seven patients.
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Affiliation(s)
- M Giulioni
- Department of Neurosurgery, Bellaria Hospital, Bologna, Italy
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40
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Muschter R, Hessel S, Hofstetter A, Keiditsch E, Rothenberger KH, Schneede P, Frank F. [Interstitial laser coagulation of benign prostatic hyperplasia]. Urologe A 1993; 32:273-81. [PMID: 7690498] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Abstract
We report on the new method of interstitial laser coagulation for the treatment of benign prostatic hyperplasia (BPH). The procedure is based on the interstitial application of Nd:YAG laser irradiation, delivered through a new light guide system. Such light applicators coagulate constant tissue volumes in a homogeneous manner, as proven by in vitro studies in different tissues, including surgically removed prostate adenoma. The extent of the coagulation is determined by laser power and irradiation time. At 5 W, for example, and during a 10-min period, this zone reached a diameter of up to 20 mm. Temperatures generated in the process were over 100 degrees C, as measured by time/space resolution. These results were confirmed by in vivo studies in canine prostates. In the course of 7 weeks, the coagulated areas formed scars with degeneration and fibrosis, accompanied by marked shrinking. Neighbouring organs were not affected. The method was successfully transferred to clinical practice. The application of the light guides to the lateral lobes was performed percutaneously from the perineum under transrectal ultrasound guidance. The median lobe was punctured transurethrally under direct vision. Twenty-seven patients with an average age of 67.7 years were treated between July 1991 and March 1992. At the time of evaluation 15 patients had a follow-up of more than 2 months. They experienced a mean increase of peak flow rate from 6.6 to 15.2 ml/s and a mean decrease of residual volume from 206 to 38 ml. This was accompanied by a marked lessening of symptoms. The average prostate weight decreased from 63 to 44 g. Sexually active patients did not experience retrograde ejaculation.(ABSTRACT TRUNCATED AT 250 WORDS)
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Affiliation(s)
- R Muschter
- Klinik und Poliklinik für Urologie, Ludwig-Maximilians-Universität München
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41
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Hiele M, Penninckx F, Gevers AM, Van Eyken P, Geboes K, Ni Y, Marchal G, Van Trappen G, Fevery H, Frank F, Hessel S, Rutgeerts P. Interstitial thermotherapy for liver tumours: Studies of different fibres and radiation characteristics. Lasers Med Sci 1993. [DOI: 10.1007/bf02547808] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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42
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Frank G, Galassi E, Fabrizi AP, Frank F, Manetto V. Primary intrasellar germinoma: case report. Neurosurgery 1992; 30:786-8. [PMID: 1584398] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022] Open
Abstract
Intracranial germinomas arising primarily within the sella turcica are extremely rare. Preoperative diagnosis is difficult to establish even with sophisticated procedures. Diabetes insipidus is the main clinical manifestation. The authors report a case of an apparently primary intrasellar germinoma causing subclinical pituitary apoplexy in a 12-year-old boy. The transsphenoidal approach and appropriate radiotherapeutic management were employed with a good outcome.
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Affiliation(s)
- G Frank
- Department of Neurosurgery, Bellaria Hospital, Bologna, Italy
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43
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Denk DM, Grasl MC, Frank F, Deutsch W, Ehrenberger K. Surgical voice rehabilitation after laryngopharyngectomy. Functional results of tracheo-hypopharyngeal shunts by jejunal transplantation. Eur Arch Otorhinolaryngol 1992; 249:248-52. [PMID: 1524804 DOI: 10.1007/bf00714486] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.1] [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: 12/27/2022]
Abstract
For surgical voice rehabilitation after pharyngolaryngectomy we use the technique of placing a siphonlike jejunal interposition in order to create a tracheohypopharyngeal shunt. In this paper we present the functional benefits of this method of voice rehabilitation. The best results achieved are compared with a normal voice using the following test parameters: electroacoustic sound analyses and voice status. The findings show that the siphon voice is adequate for everyday purposes and can achieve useful social verbal communication.
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Affiliation(s)
- D M Denk
- 1st ENT Department, University of Vienna, Austria
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44
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Frank F, Eichenlaub M, Hessel S, Wondrazek F. Application systems for intracorporeal laser-induced shockwave lithotripsy using the Nd:YAG Q-switched laser. J Clin Laser Med Surg 1990; 8:51-5. [PMID: 10150126 DOI: 10.1089/clm.1990.8.51a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
For laser-induced shockwave lithotripsy, the electromagnetic energy of a laser light pulse is converted intracorporeally into the acoustic energy of a shockwave. The lithotriptor is based on a specially developed, Q-switched Nd:YAG laser whose high power light pulses (70 mJ, 25 nsec) are coupled into a flexible quartz fiber with a core diameter of 600 mum. Using focusing elements, energy densities higher than 6 x 10 5 J m -2 can be achieved, resulting in an optical breakdown in water followed by a shockwave. As a result of different absorption mechanisms, the breakdown threshold can be decreased by placing a metallic target into the laser beam. The different shockwave formations of such optomechanical transducers have been measured. First clinical applications have been performed.
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Affiliation(s)
- F Frank
- MBB-Medizintechnik GmbH, Munich, West Germany
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Reinecke RK, Kirkpatrick R, Kriel AM, Frank F. Availability of infective larvae of parasitic nematodes of sheep grazing on Kikuyu (Pennisetum clandestinum) pastures in the winter rainfall area. Onderstepoort J Vet Res 1989; 56:223-34. [PMID: 2626260] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023] Open
Abstract
Thirteen groups of 4 South African mutton Merinos grazed for 4 weeks with the flock on Kikuyu pastures and were slaughtered for total and differential worm counts at necropsy. Subsequently 12 groups of 8 week tracers grazed on the pastures and were killed for worm counts post mortem. The following were present in most sheep: Teladorsagia (syn. Ostertagia) circumcincta, Trichostrongylus axei, Trichostrongylus colubriformis, Dictyocaulus filaria and Oesophagostomum venulosum. Haemonchus contortus, Nematodirus spathiger and Trichuris skrjabini were less frequently recovered. Optimal conditions for infestation of grazing sheep occurred from June (late autumn)--October (spring) when mean temperatures in any 4 week period were less than 20 degrees C and a total of greater than 40 mm of rain fell on 8 or more separate days. When the mean temperatures exceeded 20 degrees C pastures were safe, sheep acquiring less than 1,000 worms in 4 weeks.
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Affiliation(s)
- R K Reinecke
- Department of Parasitology, University of Pretoria
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Tonelli L, Sintini M, Manetto V, Frank F, Torcia E, Mavilla L, Merli GA. Paretic neurosyphilis and cerebral gumma. Case report. J Neurosurg Sci 1989; 33:319-22. [PMID: 2634089] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
A rare case of neurosyphilis presenting with dementia paralytica and radiological appearance of cerebral gumma is reported. In accordance with previous comparable reports Authors noticed that diagnosis of this disease actually is still based on serological tests and clinical examination. CT, NMR and Cerebral angiography were not able to provide diagnostic findings, although NMR confirmed its ability to detect lesions not discovered by CT scan. Also findings from stereotactic biopsy only revealed an old not active infection.
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Affiliation(s)
- L Tonelli
- Department of Neurosurgery and Neuroradiology, Modena City Hospital, Italy
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Abstract
The authors report on indications and results of percutaneous surgical treatment of trigeminal neuralgia based on own experiences in 1124 cases. In 912 cases percutaneous thermorhizotomy and in 212 cases percutaneous microcompression have been used. As a conclusion the following considerations have been stressed: I) In both methods slight hypaesthesia appears to obtain good pain relief; II) Percutaneous thermorhizotomy is indicated in third division neuralgias; III) Percutaneous microcompression is indicated for first and second division neuralgias only when the trigeminal cistern is not abnormally dilated; IV) Undesirable side-effects after either thermorhizotomy and microcompression are similar and transitory in most cases; V) Pain recurrence for both procedures are comparable and range at about 25%.
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Affiliation(s)
- F Frank
- Division of Neurosurgery, Bellaria Hospital, Bologna, Italy
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Galliani I, Frank F, Gobbi P, Giangaspero F, Falcieri E. Histochemical and ultrastructural study of the human pineal gland in the course of aging. J Submicrosc Cytol Pathol 1989; 21:571-8. [PMID: 2790735] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
A histochemical and ultrastructural study was carried out on the pineal gland of 2 day- to 86-year-old subjects. Specimens were obtained by stereotaxis in the course of neurosurgery; other specimens were autoptical pineal fragments. Histochemical and ultrastructural analyses showed lipofuscin pigments, frequently localized in the proximity of blood capillaries and of cytoplasmic microacervuli. The brain sand amount does not appear to be age-related because microacervuli are barely present or frequently absent in the oldest subjects. Its involvement in the secretory activity rather than in gland atrophy is also suggested. The close relationship between cytoplasmic microacervuli and intermediate filaments suggests a possible role of the cytoskeleton in the formation of the brain sand.
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Affiliation(s)
- I Galliani
- Istituto di Anatomia Umana Normale, Università di Bologna, Italia
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Abstract
A report is given on indications and results of treatment of chronic cancer pain using stereotactic mesencephalic tractotomy (SMT), based on own experiences in 202 patients. Percutaneous cervical cordotomy for upper body pain syndromes has been abandoned and replaced by SMT. Operative mortality of SMT was less than 0.5%, and also its morbidity was low and usually transitory. Bilateral procedures may be performed with an interval of at least seven days. Early recurrences within one month (15%) are due to insufficient coagulation. Late pain recurrence occurred in 4% and may be due to either nervous system regeneration (sprouting) or transmission of pain by alternate secondary pathways.
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Affiliation(s)
- F Frank
- Division of Neurosurgery, Bellaria Hospital, Bologna, Italy
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Frank F, Gaist G, Frank G, Fabrizi AP, Frank-Ricci R, Spagnolli F, Godano U. Stereotactic radioisotope implantations in the treatment of inoperable low malignancy neoplasms. J Neurosurg Sci 1989; 33:119-21. [PMID: 2674342] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
The authors report their experience of 53 patients with low grade malignancy cerebral neoplasms treated by means of stereotactic 125-I permanent interstitial radiotherapy. The method has been employed from 1981 to date. The authors confirm the validity of the technique in this brief report, and stress the greater efficacy of this treatment in young patients (less than 40 y/o) than in adults.
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Affiliation(s)
- F Frank
- Division of Neurosurgery, Bellaria Hospital, Bologna, Italy
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