Jürgen Hambrecht, Henner Straub, Eugen Müller,
... Diphenyl-1,2-cyclobutendion mit Grignard-Verbindungen Jürgen Hambrecht, Jürgen Hambrecht Chemisches Institut der Universität Tübingen, D-7400 ... 18Search for more papers by this author Jürgen Hambrecht, Jürgen Hambrecht Chemisches Institut der Universität Tübingen, D-7400 Tübingen ...
Tópico(s): Organic Chemistry Cycloaddition Reactions
1974 - Wiley | Chemische Berichte
Adolf Echte, Franz Haaf, Jürgen Hambrecht,
Abstract Hermann Staudinger , der Begründer der Polymerchemie, wäre 1981 hundert Jahre alt geworden. Eine der Schlüsselsubstanzen, an denen er den Aufbau der Hochpolymere aufklärte, war Polystyrol. – Polystyrol, einer der bedeutendsten thermoplastischen Kunststoffe, wird seit fünfzig Jahren industriell erzeugt. Es hat nicht nur unser tägliches Leben erleichtert, es war auch Modellsubstanz für den Auf‐ und Ausbau der Polymerchemie und ‐physik, es war Pioniermaterial für den verfahrenstechnischen Umgang ...
Tópico(s): History and advancements in chemistry
1981 - Wiley | Angewandte Chemie
Adolf Echte, Franz Haaf, Jürgen Hambrecht,
Abstract Hermann Staudinger , the founder of polymer chemistry, would have been 100 years old this year. One of the key materials with which he elucidated the structure of high polymers was polystyrene.—Polystyrene, one of the most important thermoplastics, has now been manufactured industrially for some 50 years. Not only has it simplified our daily lives in a variety of ways, it has also been a model substance for the development and expansion of polymer chemistry and polymer physics, and it was ...
Tópico(s): Epoxy Resin Curing Processes
1981 - Wiley | Angewandte Chemie International Edition
Tópico(s): Porphyrin and Phthalocyanine Chemistry
1977 - Thieme Medical Publishers (Germany) | Synthesis
Jürgen Hambrecht, Henner Straub, Eugen Müller,
Tópico(s): Chemical Reactions and Isotopes
1976 - Elsevier BV | Tetrahedron Letters
Jürgen Hambrecht, Eugen Müller,
Abstract Die Bis(acetylenketone) 7a–c und 8a , d geben mit Tris(triphenylphosphin)rhodium(I)‐chlorid Komplexe unterschiedlicher Struktur, die mit Acetylenderivaten zu den substituierten 1,4 Naphthochinonen 14–19 . a–d , mit Chalkogenen oder Nitrosobenzol zu den isoheterokondensierten Benzochinonen 21–24 , b–d weiterreagieren. Bei der thermischen Isomerisierung von 7b und c entstehen die 1,4‐Anthrachinone 25b . c .
Tópico(s): Phosphorus compounds and reactions
1977 - Wiley | Justus Liebig s Annalen der Chemie
Karl‐Heinz Illers, W. Heckmann, Jürgen Hambrecht,
Tópico(s): biodegradable polymer synthesis and properties
1984 - Springer Science+Business Media | Colloid & Polymer Science
Jürgen Hambrecht, Eugen Müller,
The Grignard-addition of phenylethynylmagnesium bromide to 1,2,4,5-tetraformylbenzene (1) and the subsequent oxidation of the primary formed alcohol (2) afford the l,2,4,5-tetra(phenylpropynoyl)benzene (8). The reaction of 8 with tris(triphenylphosphin)-rhodium-(I)chloride leads to the Rh-complex (4), which further reacts with acetylenederivates and chalcogens to form the quinoid compounds 5a-c and 6, 7.
Tópico(s): Chemical Synthesis and Reactions
1977 - De Gruyter | Zeitschrift für Naturforschung B
Jürgen Hambrecht, Henner Straub, Eugen Müller,
Abstract 7,8‐Epoxy‐1,3,5‐cyclooctatrien (Cyclooctatetraenoxid) ( 1 ) reagiert mit Äthinylmagnesium‐bromiden 2 zu den Äthinyl‐cycloheptatrienyl‐carbinolen 3 , die mit Thionylchlorid in die Enine 4 übergeführt werden können.
Tópico(s): Asymmetric Synthesis and Catalysis
1974 - Wiley | Chemische Berichte
Klaus Albert, Jürgen Hambrecht,
Abstract ⊿G c ≠ values derived from temperature dependent 1 H NMR of phenyl substituted cyclopentadienes show a dramatic increase by immobilizing two phenyl-rings. This phenomenon is explained by an increase in the transition state energy level whereas the ground state is hardly affected.
Tópico(s): Synthesis and Reactions of Organic Compounds
1978 - De Gruyter | Zeitschrift für Naturforschung B
Tópico(s): Asymmetric Synthesis and Catalysis
1976 - Elsevier BV | Tetrahedron Letters
Henner Straub, Jürgen Hambrecht,
Tópico(s): Ferrocene Chemistry and Applications
1975 - Thieme Medical Publishers (Germany) | Synthesis
P. Christian Schulze, Stephan Gielen, Volker Adams, Axel Linke, Sven Möbius‐Winkler, Sandra Erbs, Jürgen Kratzsch, Rainer Hambrecht, Gerhard Schüler,
Tópico(s): Cardiac Fibrosis and Remodeling
2003 - Springer Nature | Basic Research in Cardiology
Henner Straub, Jürgen Hambrecht,
Tópico(s): Asymmetric Synthesis and Catalysis
1977 - Wiley | Chemische Berichte
Rainer Hambrecht, Anamaria Wolf, Stephan Gielen, Axel Linke, Jürgen Hofer, Sandra Erbs, Nina Schoene, Gerhard Schüler,
Studies of the cardioprotective effects of exercise training in patients with coronary artery disease have yielded contradictory results. Exercise training has been associated with improvement in myocardial perfusion even in patients who have progression of coronary atherosclerosis. We therefore conducted a prospective study of the effect of exercise training on endothelial function in patients with coronary artery disease.
Tópico(s): Blood Pressure and Hypertension Studies
2000 - Massachusetts Medical Society | New England Journal of Medicine
RETURN TO ISSUEPREVNewsNEXTJürgen HambrechtJEAN-FRANÇOI TREMBLAYCite this: Chem. Eng. News 1999, 77, 14, 17Publication Date (Print):April 5, 1999Publication History Published online12 November 2010Published inissue 5 April 1999https://pubs.acs.org/doi/10.1021/cen-v077n014.p017https://doi.org/10.1021/cen-v077n014.p017newsACS PublicationsCopyright © 1999 American Chemical SocietyArticle Views4Altmetric-Citations-LEARN ABOUT THESE METRICSArticle Views are the COUNTER-compliant sum of full text article ...
1999 - American Chemical Society | Chemical & Engineering News
Rainer Hambrecht, P. Christian Schulze, Stephan Gielen, Axel Linke, Sven Möbius‐Winkler, Sandra Erbs, Jürgen Kratzsch, Andreas Schubert, Volker Adams, Gerhard Schüler,
Background Chronic heart failure (CHF) is associated with progressive muscle atrophy and reduced local expression of insulin-like growth factor I (IGF-I). Design The present study was designed to test the hypothesis that the local deficiency of IGF-I in the skeletal muscle of patients with CHF would respond to a 6-months aerobic training intervention. Therefore, 18 patients [mean age 52.4 (SD 4.8) years, left ventricular ejection function (LVEF) 27 (SD 6)%] were prospectively randomized to either 6 months ...
Tópico(s): Nutrition and Health in Aging
2005 - SAGE Publishing | European Journal of Cardiovascular Prevention & Rehabilitation
... ist es passend, dass es einen Essay von Jürgen Hambrecht enthält, in dem die Herausforderungen beleuchtet werden, die ... selbst eine europäische Perspektive viel zu eng ist. Jürgen Hambrecht ist als Vorstandsvorsitzender der BASF (und Chemiker) prädestiniert ...
Tópico(s): Physics and Engineering Research Articles
2006 - Wiley | Angewandte Chemie
... thus fitting that it includes an Essay from Jürgen Hambrecht which sheds light on the challenges facing young ... As CEO of BASF (and himself a chemist) Jürgen Hambrecht is predestined as no other to impart his ...
Tópico(s): History and advancements in chemistry
2006 - Wiley | Angewandte Chemie International Edition
Axel Linke, Nina Schoene, Stephan Gielen, Jürgen Hofer, Sandra Erbs, Gerhard Schüler, Rainer Hambrecht,
OBJECTIVES We sought to analyze the systemic effects of lower-limb exercise training (ET) on radial artery endothelial function in patients with chronic heart failure (CHF). BACKGROUND Local ET has the potential to improve local endothelial dysfunction in patients with CHF. However, it remains unclear whether the systemic effects can be achieved by local ET. METHODS Twenty-two male patients with CHF were prospectively randomized to either ET on a bicycle ergometer (ET group, n = 11; left ventricular ...
Tópico(s): Heart Rate Variability and Autonomic Control
2001 - Elsevier BV | Journal of the American College of Cardiology
Christof Burgstahler, Axel Preßler, Susanne Berrisch-Rahmel, Klaus‐Peter Mellwig, Christa Bongarth, Martin Halle, Josef Niebauer, Rainer Hambrecht, Stephan Gielen, Jürgen M. Steinacker, Jürgen Scharhag,
Tópico(s): Cardiac Imaging and Diagnostics
2019 - Springer Nature | Der Kardiologe
Volker Schächinger, Sandra Erbs, A. Elsasser, Werner Haberbosch, Rainer Hambrecht, Hans Hölschermann, J. Yu, Roberto Corti, Detlef G. Mathey, C Hamm, T. Suselbeck, Nikos Werner, Jürgen Haase, J. Neuzner, A. Germing, B. Màrk, Birgit Aßmus, Torsten Tonn, Stefanie Dimmeler, Andreas M. Zeiher,
Aims To investigate the clinical outcome after intracoronary administration of autologous progenitor cells in patients with acute myocardial infarction (AMI). Methods and results Using a double-blind, placebo-controlled multicentre trial design, we randomized 204 patients with successfully reperfused AMI to receive intracoronary infusion of bone-marrow-derived progenitor cells (BMCs) or placebo medium into the infarct artery 3–7 days after successful infarct reperfusion therapy. At 12 months, the ...
Tópico(s): Acute Myocardial Infarction Research
2006 - Oxford University Press | European Heart Journal
Innovation through communication: What is required of young graduates in chemistry today and how can these skills be developed? An open dialogue between universities and the chemical industry may push innovations and thus lead the way to a successful future.
Tópico(s): Academic Writing and Publishing
2006 - Wiley | Angewandte Chemie International Edition
... Company geworden ist, erläutert im Gespräch der Vorstandsvorsitzende Jürgen Hambrecht.
Tópico(s): Innovation, Technology, and Society
2005 - Wiley | Nachrichten aus der Chemie
... Finanzwirtschaft, Medien und Politik waren der BASF‐Vorstandsvorsitzende Jürgen Hambrecht und Degussa‐Forschungsvorstand Alfred Oberholz. Mit Auftaktrede und ...
Tópico(s): Chemistry and Chemical Engineering
2005 - Wiley | Nachrichten aus der Chemie
... Tarnok A, Gielen S, Emmrich F, Schuler G, Hambrecht R. Increase of circulating endothelial progenitor cells in patients with coronary artery disease after exercise-induced ischemia. Arterioscler Thromb Vasc Biol. 2004; 24: 684–690.LinkGoogle Scholar6 Laufs U, Werner N, Link A, Endres M, Wassmann S, Jurgens K, Miche E, Bohm M, Nickenig G. Physical ...
Tópico(s): Cancer, Hypoxia, and Metabolism
2005 - Lippincott Williams & Wilkins | Arteriosclerosis Thrombosis and Vascular Biology
Stephan Gielen, Marcus Sandri, Irina Kozarez, Jürgen Kratzsch, Daniel Teupser, Joachim Thiery, Sandra Erbs, Norman Mangner, Karsten Lenk, Rainer Hambrecht, Gerhard Schüler, Volker Adams,
Background— Muscle wasting occurs in both chronic heart failure (CHF) and normal aging and contributes to exercise intolerance and increased morbidity/mortality. However, the molecular mechanisms of muscle atrophy in CHF and their interaction with aging are still largely unknown. We therefore measured the activation of the ubiquitin-proteasome system and the lysosomal pathway of intracellular proteolysis in muscle biopsies of CHF patients and healthy controls in two age strata and assessed the age- ...
Tópico(s): Cardiomyopathy and Myosin Studies
2012 - Lippincott Williams & Wilkins | Circulation
Henning Morawietz, Sandra Erbs, Jürgen Holtz, Andreas Schubert, Michael Krekler, Winfried Göettsch, Oliver Kuß, Volker Adams, Karsten Lenk, Friedrich W. Mohr, Gerhard Schüler, Rainer Hambrecht,
Statins and angiotensin type 1 (AT1) receptor blockers reduce cardiovascular mortality and morbidity. In the Endothelial Protection, AT1 blockade and Cholesterol-Dependent Oxidative Stress (EPAS) trial, impact of independent or combined statin and AT1 receptor blocker therapy on endothelial expression of anti-atherosclerotic and proatherosclerotic genes and endothelial function in arteries of patients with coronary artery disease were tested.Sixty patients with stable coronary artery disease undergoing ...
Tópico(s): Atherosclerosis and Cardiovascular Diseases
2006 - Lippincott Williams & Wilkins | Circulation
Über den Tellerrand blicken ! Welche Qualifikationen sind für die Nachwuchschemiker von heute entscheidend und wie kann man sie vermitteln? Ein intensiverer Dialog zwischen den Hochschulen und der chemischen Industrie könnte die Innovationsbereitschaft fördern und so den Weg in eine erfolgreiche Zukunft weisen.
Tópico(s): Chemistry and Chemical Engineering
2006 - Wiley | Angewandte Chemie
Abstract Das Tetraformylbenzol (I) liefert mit dem Grignardreagenz (II) den Alkohol (III), der mit MnO 2 zu dem Phenylpropinoyl‐Derivat (IV) oxidiert wird.
Tópico(s): Oxidative Organic Chemistry Reactions
1977 - Wiley | Chemischer Informationsdienst