Lutz-Günther Fleischer

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Lutz-Günther Fleischer (2014)

Lutz-Günther Fleischer (born July 26, 1938 in Gera ) is a German engineer and professor . He is one of the specialists in process engineering and thermodynamics and especially in the field of food technology in Germany.

Life

Lutz-Günther Fleischer was born in Gera and grew up in Apolda and Jena . He learned from 1952 to 1956 the profession of optician fine at the company Carl Zeiss Jena , which enabled him with a delegation, on the second chance in 1959 at the ABF the University of Jena drop the high school. During this time he became a member of the SED . In the same year he began studying chemistry at the Technical University "Carl Schorlemmer" Leuna-Merseburg (THL-M), which he completed in 1964 with a thesis on electrode kinetics on graphite surfaces at the Institute for Physical Chemistry at the chair of Rolf Landsberg .

He has been married to Regina Fleischer (née Köder) since 1964 . The family has two sons: the physicist Torsten Fleischer and the PhD biologist Axel Fleischer ; both graduated from the Humboldt University in Berlin.

He started his career as a scientific assistant at the THL-M in the Faculty of Process Engineering and Basic Sciences / Institute for Process Engineering at the Chair of Technical Thermodynamics and Energy Management of Wolfgang Fratzscher . After completing his doctorate with the thesis "Investigations into the mass transfer on rotating disks with special consideration of the surface structure" to become Dr.-Ing. in 1968, for which he received the Carl Schorlemmer Prize of the THL-M, he became senior assistant here.

Activity as a university lecturer

In 1969 he acquired the teaching qualification "Facultas docendi", in 1970 he was appointed as a university lecturer (equivalent to C3 professor) for "Thermodynamics of irreversible processes" at the THL-M. His teaching duties also included technical thermodynamics for the fields of process engineering and system engineering as well as materials engineering and economics.

From 1971 he headed the "Process Engineering" research area (subject areas of thermodynamics, rheology and fluid mechanics) in the Process Engineering Section. Within this section, he cooperated on an interdisciplinary basis with the "Automation Technology" science department headed by Georg Brack . From 1966 to 1974, as head of the commission for education and training of the scientific advisory board for process engineering at the Ministry of Higher and Technical Schools (MHF), he played a key role in the development and content design of the basic course in process engineering in the GDR.

From September 1972 to March 1973 he completed postgraduate studies at the Leningrad Technological Institute (LTI) with Professor PG Romankov .

From 1971 to 1975, Fleischer was the coordinator of THL-M and, together with his employees, was scientifically active as a contractual research partner of the Wolfen film factory ( ORWO ), in particular involved in process engineering film and magnetic tape research.

Professor of Process Engineering

In May 1979 the Humboldt University of Berlin (HUB) qualified him as a professor in the field of process engineering (certificate of equivalence from 1992) with the thesis "Process engineering investigations and physical-mathematical models of drying shrinking material systems", which is also a full member of the Academy of Sciences GDR Eberhard Leibnitz examined.

In 1979, Fleischer was appointed associate professor and later honorary professor at the HUB. He also worked actively in the URANIA - Society for the Dissemination of Scientific Knowledge and was an elective member of the Presidium from 1975 to 1990, initially as Vice President for Natural, Technical, Agricultural Sciences, Mathematics and Medicine and since December 1986 as 1st Vice President (successor by Horst Mädicke ). At the same time, he was responsible for coordinating URANIA's science journalism with the publishing house of the same name as well as television and radio in the GDR in long-term series such as 'Neue Fernseh-URANIA', 'AHA', 'Wissenschaft im Meinungsstreit', 'URANIA im Funk' and others.

After the reunification Fleischer 1994 as part of rearrangements at the universities in Berlin and after a comprehensive personal evaluation at the Technical University of Berlin (TUB), Department "Food Science and Biotechnology", as a university professor appointed. With three extensions of his period of service, he headed the food process engineering department until October 2006 and, since 1998, the traditional Berlin Sugar Institute .

In 1997, Fleischer was Vice Dean of the Food Science and Biotechnology Department and, from 2003 to 2005, Dean of the TUB's Department of Process Sciences. He was also a member of the Academic Senate of the TUB for several legislative periods until October 2006 and from 2004 to 2006 he was also the spokesman for the majority parliamentary group.

In teaching there, he represented the fields of food process engineering, thermodynamics, energy, impulse and material transport processes, energy and refrigeration engineering, as well as the technology assessment course across faculties for several courses of study at the Faculty of Process Sciences .

Research activity

Parallel to his teaching activities, he developed his own industry-related research activities with numerous partners. The main focus of research was continuously under thermodynamic and process engineering aspects in the field of energy, material and impulse transport in complex material systems, such as information recording and biomaterials, their physical-mathematical modeling (especially the drying of strongly shrinking material systems) and the experimental and theoretical determination of relevant transport coefficients , the evaluation of processes under technological conditions (process management and product quality) and the design of modified process steps for the production of information recording materials (photographic films, video and audio tapes). Investigations on the value and limits of entropy and exergy concepts in the characterization of processes and the evaluation of systems were derived.

After German reunification in 1990, work on the active principles and processes of food technology was added, including the use of static high pressure to modify gel structures and gel-forming substances (maltodextrins, gelatins, extractive and biotechnologically obtained hyaluronates), the use of high-voltage pulses to support the electroplasmolytic support of the cold extraction of Sugar beet.

One focus of the cooperation with the sugar industry was the further training of specialists in the European sugar industry. On the initiative of Fleischer, in addition to the advanced training courses for engineers and academic and scientific staff in the European sugar industry, which have been implemented since 2001, regular courses for technicians at the Berlin Sugar Institute on sugar and energy-related problems have also been held.

Until the end of his professional life, Fleischer was a member of the cross-faculty research network Biotechnology Center (BTC) at the TUB. Several of the food process engineering and biotechnological works dealt with the modeling and appropriate quantification of structure formation in biopolymers by means of a dimensionless entropy concept - primarily differently processed (especially high-pressure treated) gelatins and starches, bio-technically obtained hyaluronates and bio-composites with active ingredients for applications in life science. Area (patent: biopolymer composites for topical applications).

The modifying accumulation, isolation, physiological effects (via glucan receptors, cytokines, acute phase proteins) and the mechanisms of action of (1,3), (1,6) beta-D-glucans and complementary ones were exposed Active ingredients mainly from the cell walls of Saccharomyces cerevisiae and their use - tested in extensive field tests - as immunomodulating health ingredients in the human and veterinary sector. With a special working group, he devoted himself to the screening and in vitro testing of probiotic microorganisms.

The screening of homofermentative probiotic lactobacilli, their biotic extraction, in-vitro testing in a gastrointestinal model and their use in functional food served to select particularly bioactive strains from a native strain collection that were sufficiently viable in the gastrointestinal tract. This resulted in a patented process for the production of functional condiments.

In a joint DFG project with the Alfred Wegener Institute for Polar and Marine Research Bremerhaven (Dietrich Siebers, Christof Baum) and the University of Veterinary Medicine Hanover (Wilfried Meyer, Institute for Anatomy), the causes and fundamental mechanisms of self-cleaning, des Environmentally neutral anti-biofouling on / in the epidermis of a dolphin species ( globicephala melas ). In the skin of this pilot whale, a material, structural and functional highly complex cross-linked gel with enzymatically controlled reactions and a beta-glucan receptor were detected. These basic findings led u. a. to the joint patent: biocide-free antifouling coatings.

The sugar technological work, which was mainly carried out with diploma theses, dissertations and projects with the German sugar industry and the working group of industrial research associations "Otto von Guericke" (AiF), focused on qualitative aspects of sucrose production (especially evaporation, crystallization and drying) and on energy-efficient, quality assurance and quality improvement, modified process management, new process indicators such as easily measurable rheological and dielectric parameters, as well as automated crystal analysis. The system was successfully implemented in the sugar industry.

Fleischer also dealt with process modeling , control and regulation of technological sections, in particular modeling of the cooling crystallization kinetics, quality assurance (color and odor) changed temperature control in evaporators and crystallizers, automated image analysis, complex viscosity coefficients and complex dielectric constants of sucrose solutions and crystal suspensions as on-line measurement - and controlled variables.

Interdisciplinary work by Fleischer was devoted to the regularities of special technologies , the development of general technology, the social relevance and acceptance of technology development, technology genesis, science development and technology impact assessment .

In summary, his research work included the analysis, evaluation and physical-mathematical modeling of complex transport and structuring processes as well as primarily physical-chemical and biotic material conversions in multi-component, multi-phase material systems, especially information recording materials (photographic films, audio and video tapes ), technical sucrose systems, food matrices as well as native and modified biopolymers including fundamental material data, thermodynamics and technologically relevant aspects of flow behavior - fluid dynamics and rheology.

The results of his disciplinary and interdisciplinary research are published in well over 100 scientific publications. In addition, Fleischer is the author and editor of three textbooks, co-author of several scientific editions as well as the author of numerous printed and electronic articles in popular science, a long-standing member of editorial boards and publisher of popular science books and book series, including the 'Polytechnische Bibliothek' of the Fachbuchverlag Leipzig. He was involved in several patents. Fleischer has supervised more than 30 dissertations, promoted post-doctoral qualifications and prepared countless scientific reports.

Honors and memberships

Fonts (selection)

  • Investigations into the mass transfer on rotating disks - with special consideration of the geometric surface structure. Dissertation, TH for Chemistry, Faculty for Process Engineering and Basic Sciences, Leuna-Merseburg 1968.
  • Introduction to process engineering. German publishing house for basic industry, Leipzig 1973 (co-author, collective of authors)
  • Technical thermodynamics I. German publishing house for basic industry, Leipzig 1973, 2nd edition 1976 (lead, co-author: Hans-Peter Picht).
  • Technische Thermodynamik II. Deutscher Verlag für Grundstoffindindustrie, Leipzig 1974, (lead jointly with Norbert Elsner, co-authors: B. Franke, W. Häußler, A. Henatsch, A. Pawlowitsch, K. Stieper, M. Strümke).
  • Experimental and theoretical determination of FICK diffusion coefficients for binary systems of magnetic tape production. Journal for signal recording materials 5, 1978, Berlin, Akademie-Verlag (co-authors O. Rühl, H.-P. Picht).
  • Linear and non-linear thermodynamic material equations of chemical reactions and their variational derivation. Journal for physical chemistry, Leipzig (259) 1978, pp. 557-567. (Co-authors: J. Heymann and G. Jablonsky and S. Slinko from the Siberian Department of the Academy of Sciences of the USSR in Novosibirsk).
  • Process engineering studies and physical-mathematical models of the drying of shrinking material systems. Dissertation B (Habilitation), Humboldt University Berlin 1979.
  • The contribution of thermodynamics to the physical interpretation of structure formation and evolution. Urania Presidium Publishing House, Berlin 1979.
  • Experts provide information - news from the new TV Urania. Urania-Verlag, Leipzig; Jena; Berlin 1980 (edited with Gerhard Sieler).
  • First-hand knowledge - insights, experiences, successes in science. Deutscher Verlag der Wissenschaften, Berlin 1981 (ed. With Harro Hess ).
  • Science in dialogue - science for progress, progress in science. Urania-Verlag, Leipzig; Jena; Berlin 1988 (edited with Gerhard Banse ), ISBN 3-332-00253-8 .
  • La science face a ses responsabilites. Bulletin de Assocation des ECRIVAINS SCIENTIFEQUES de France, 1990, vol. 39, pp. 23-30.
  • Energy generation, a key human problem. In: High technologies in practice, Verlag Die Wirtschaft, 1990, Berlin, p. 113 ff.
  • Use of renewable raw materials in future technologies of central German chemical companies and the necessary research projects. Humboldt-Universität zu Berlin, Faculty of Food Technology, Berlin 1991 (interdisciplinary study, 205 pages and appendices; lead, 16 co-authors)
  • TA study on the use of "renewable raw materials" in future technologies of central German chemical companies and the necessary research projects. Joint project, Düsseldorf 1991, authors: P. Doetsch, L.-G. Fleischer, H. Fürtig, D. Knorr, H. Rauchstein, B. Stoss. Printed as a short version of project results 3, Helmut Fürtig, Chemie AG, Ed .: VDI-Technologie-Zentrum Physikalische Technologie, Düsseldorf 1992.
  • Self-organization and development from a thermodynamic point of view. In: Berlin studies on the philosophy of science & human ontogenetics, Volume 7: Behavior, information change and organismic evolution. On the person and work of Günter Tembrock (Eds. Karl-Friedrich Wessel and Frank Naumann ). Kleise Verlag, Bielefeld, 1994, pp. 70-82, ISBN 3-89370-164-8 .
  • Value and limits of entropy and exergy concepts for economic and ecological systems - factological and methodological reflections. Nuclear Research Center Karlsruhe, Department for Applied Systems Analysis (AFAS), Environmental Research Information Center, Karlsruhe 1994.
  • Properties of hyaluronic acid (structure in natural raw materials). Perfume and cosmetics, international journal for research, development and production in the perfume and cosmetics industry 77 (5/1996) 343–346 (co-author: Westphal, G.).
  • Post-Stress Thickening of Dextran / Concanavalin A Solutions Used as Sensitive Fluids in a Viscosimetric Affinity Assay for Glucose. Biotechnology Progress, 13 (1997) 722-726 (co-authors: Beyer, PU; Ehwald, R.).
  • Influence of high pressure on gel-forming maltodextrins. Part 1: Macrostructure, thermodynamic and fluid dynamic effects. Part 2: Investigations into the primary structure; Discussion of results and conclusions. Starch / strength, 1998, 50. 11-12. Wiley-Verlag GmbH, 499-517 (co-authors: Schierbaum, F .; Schuricht, H.).
  • Thermal conductivity of sugar crystals and sugar spills. Publishing house Dr. A. Bartens, Zuckerindustrie 123 (10) 794-802, 1998 (co-author: Schmidt, P.-V.).
  • Influence of the viscosity on the film evaporation as it arises on vertical plates. Publ. Of techn. Papers and proceedings of the 58th annual meeting of Sugar Industry Technologists, Estoril, Portugal, 39-55, 1999 (co-authors: Schulze, B.-C; Mauch, W.).
  • Optimization of an image analysis system for assessing the crystal quality in sucrose crystal suspensions. Commission Internationale Technique de Sucrerie (CITS), Antwerp, CITS Proc., Verlag Dr. A. Bartens Berlin, 52–61, 1999 (co-authors: Wagner, G .; Schick, R .; Austmeyer, KE; Wittenberg, A.).
  • A cryo-scanning electron microscopic study of the skin surface of the pilot whale (Globicephala melas). Aquatic Mammals 26, 7-16, 2000 (co-authors: Baum, C .; Meyer, W .; Stelzer, R .; Siebers, D.).
  • Blood cells and plasma proteins of chickens fed a diet supplemented with (1,3), (1,6) -Beta-D-Glucan and enrofloxacin. Arch. Anim. Nutr. (Vol. 53/2000), pp 59–73 (co-authors: Gerber, G .; Liezenga, RW; Lippert, E .; Scholl, H; Westphal, G.).
  • A Zymogel enhances the self-cleaning abilities of the skin of the pilot whale (Globicephala melas). Comparative Biochemistry and Physiology Part A 130 A. $. Elsevier, 835–847, 2001 (co-authors: Baum, C; Meyer, W .; Roessner, D .; Siebers, D.).
  • Gelation kinetics of a gel collected from the corneocytes of the pilot whale (Globicephala melas). Zoology, 104 Supplement, DZG (94.1), p. 53, 2001 (co-authors: Baum, C .; Meyer, W .; Siebers, D .; Stelzer, R.).
  • Optimization of an image analysis system for the assessment of the crystal quality in sucrose crystal suspensions. Sugar industry 126 (1/2001), Verlag Dr. A. Bartens Berlin, 34-41. (Co-authors: Wagner, G .; Schick, R .; Austmeyer, K.-E.).
  • Investigations to optimize the cooling rate during the after-product cooling crystallization. Sugar industry 126 (12/2001), Verlag Dr. A. Bartens Berlin, 945-950. (Co-authors: Schick, R .; Elahi, M.).
  • A covalently cross-linked gel derived from the epidermis of the pilot whale (Globicephala melas). Biorheology 39, (6/2002) 703-717. (Co-authors: Baum, C .; Roessner, D .; Meyer, W .; Siebers, D.).
  • Surface Properties of the Skin of the Pilot Whale (Globicephala melas). Biofouling, (Vol. 19/2003) (Supplement), pp 181-186. (Co-authors: Baum, C .; Simon, F .; Meyer, W .; Siebers, D .; Kacza, J .; Seeger, J.).
  • Fluid dynamic aspects in the operation of falling-film plate evaporators. Sugar industry 128 (3/2003), Verlag Dr. A. Bartens Berlin, 153-158. (Co-authors: Schulze, B.-C .; Ruprecht, K.).
  • Quick methods for assessing food and its raw materials. Chapter 6.3: Texture / structure and rheometry. B. Behr's Verlag GmbH & Co. KG Hamburg (2004) 361–377. Baltes, W .; Kroh, LW (ed.).
  • Development of functional lactic acid fermented drinks on a cereal basis. Brauerei-Forum 19 (6 and 7/2004), Berlin, 151–153; 173–175 (co-authors: Seidel, B .; Idler, F.).
  • Influence of reduced temperature during evaporation and crystallization on sugar Quality. SIT Conference Dubai (2005, April 3-5), UAE, Book of Abstracts, Paper 873. (Co-authors: Smejkal, Q .; Schick, R.).
  • Simplified Mathematical Model for Determination of Color Formation in Technical Sugar Solutions. Chemie Ingenieur Technik (77/2005), Issue 8, 1198. (Co-authors: Smejkal, Q .; Schick, R.).
  • Selected studies on sucrose crystallization in the Berlin Sugar Institute from 1995 to 2005. Sugar industry 130 (11/2005), Verlag Dr. A. Bartens Berlin, 840–847 (1st part) (co-authors: Schick, R .; Schmidt, P.-V .; Elahi, M .; Ruprecht, K .; Sixt, A .; Tzschätzsch, O .; Wagner , G .; Wittenberg, A.).
  • Selected studies on sucrose crystallization in the Berlin Sugar Institute from 1995 to 2005 (Part II). Sugar industry 131 (1/2006), Verlag Dr. A. Bartens Berlin, 40-44. (Co-authors: Schick, R .; Schmidt, P.-V .; Elahi, M .; Ruprecht, K .; Sixt, A .; Tzschätzsch, O .; Wagner, G .; Wittenberg, A.).
  • Factors influencing the smell of white sugar in beet processing. Sugar industry 131 (9/2006), Verlag Dr. A. Bartens Berlin (co-authors: Ruprecht, K .; Frenzel, S.).
  • Science in context - inter- and transdisciplinarity in theory and practice. Leibniz Society of Sciences in Berlin: Treatises of the Leibniz Society of Sciences, Vol. 27. Trafo Wissenschaftsverlag, Berlin 2011 (ed. With Gerhard Banse ), ISBN 978-3-89626-896-9 .
  • Energy transition. Productive force development and social contract. 5th annual conference of the Leibniz Society of Sciences. trafo Wissenschaftsverlag Berlin, 2013, ISBN 978-3-86464-006-3 .
  • Ex nihilo nil fit. Nile fit ad nihilum. Of heroes of thought, "martyrs of obstinacy" and advocates of reason. Notes on the performance and personality of protagonists of classical thermodynamics. In: Karl-Friedrich Wessel and Andreas Wessel (eds.): Personality and responsibility in science, medicine and technology. Robert Ketting in memory. Berlin studies on the philosophy of science and human ontogenetics, vol. 30. Kleine Verlag, Grünwald 2013, pp. 293–326, ISBN 978-3-937461-57-1 .
  • Technology - techné and epistémé. In: Gerhard Banse , Ernst-Otto Reher (Ed.): Technological change in science - qualitative and quantitative changes. 6th symposium of the "General Technology" working group of the Leibniz Society of Sciences in Berlin and the Institute for Technology Assessment and Systems Analysis of the Karlsruhe Institute of Technology on October 10, 2014 in Berlin. Meeting reports of the Leibniz Society of Sciences, Vol. 122. pp. 35–68. trafo Wissenschaftsverlag, Berlin 2015, ISBN 978-3-86464-092-6 .
  • with Bernd Meier (ed.): Technology & Technology - techne cum episteme et commune bonum. Honorary colloquium on the occasion of the 70th birthday of Gerhard Banse . Meeting reports of the Leibniz Society of Sciences, Vol. 131. trafo Wissenschaftsverlag, Berlin 2017, ISBN 978-3-86464-154-1 .

literature

  • Fleischer, Lutz-Günther. In: Hübner's Who is Who in the Federal Republic of Germany, XIII. Edition, Who is Who, Verlag Personenenzyklopädien, Landesredaktion Deutschland, p. 1284, Berlin 2007, ISBN 978-3-7290-0064-3 .
  • Fleischer, Lutz-Günther. In: Kürschner's German Scholars Calendar. 4, 2009, Volume I. Verlag Saur, Munich 2009, ISBN 978-3-598-23629-7 .
  • Gerhard Banse and Horst Kant (eds.): Disciplinary & Interdisciplinary - Historical & Systematic. Colloquia in honor of Lutz-Günther Fleischer , Herbert Hörz , Hans-Jürgen Treder & Siegfried Wollgast . Indeterminacy, uncertainty, flaws and fault tolerance in nature, technology and society - Lutz-Günther Fleischer on his 80th birthday. Meeting reports of the Leibniz Society of Sciences in Berlin, Volume 139/140, year 2019. trafo Wissenschaftsverlag Dr. Wolfgang Weist, Berlin 2019, pp. 19–98, ISBN 978-3-86464-176-3 .

Web links

Individual evidence

  1. ↑ For you , No. 26/1986
  2. ^ Wolfgang Fratzscher : Energy industry for process engineers. Deutsche Verlags Gesellschaft, Leipzig 1974, 2nd edition 1982, 3rd edition 1989.
  3. ↑ Wolfgang Fratzscher, K. Stephan (Ed.): Strategies for waste energy recovery. Wiesbaden 2000. E-book published by Springer-Verlag, 2014.
  4. ↑ Hans-Joachim Bittrich , Ch. Duschk, G. Fuchs: Carl Schorlemmer. German publishing house for basic industry, Leipzig 1984.
  5. ^ Klaus Hartmann: System process engineering. In: Klaus Krug , Hans-Joachim Hörig, Dieter Schnurpfeil (editor): 50 years of the university in Merseburg. Merseburg contributions to the history of the chemical industry in Central Germany, publisher: Förderverein "Sachzeugen der chemical Industrie e. V. “, Merseburg, Vol. 9 (2004) No. 1, pp. 93-98.
  6. ↑ Georg Brack : Dynamic models of procedural processes. Automation technology series, vol. 115. Verlag Technik, Berlin 1971.
  7. ↑ Dietrich Werner, D. Herrmann: msr introduces: Technical University "Carl Schorlemmer" Leuna-Merseburg - Process engineering section, automation engineering science. measure, control, regulate, Berlin. Vol. 27, No. 5, 1984, pp. 231-235.
  8. ↑ Neues Deutschland , December 6, 1986, p. 2.
  9. ↑ Werner Kriesel , Hans Rohr, Andreas Koch: History and future of measurement and automation technology. VDI-Verlag, Düsseldorf 1995, pp. 205-215, ISBN 3-18-150047-X .
  10. ↑ Wolfgang Weller : The system technology as an innovative concept. Thinking in systems - a new paradigm for handling technical and natural systems. Books on Demand GmbH, Norderstedt 2008, pp. 46-74, ISBN 978-3-8370-5748-5 [1].
  11. ↑ Werner Kriesel : Future models for computer science, automation and communication. In: Frank Fuchs-Kittowski , Werner Kriesel (Hrsg.): Computer science and society. Festschrift for the 80th birthday of Klaus Fuchs-Kittowski . Peter Lang International Science Publishers, PL Academic Research, Frankfurt a. M .; Bern; Bruxelles; New York; Oxford; Warszawa; Vienna 2016, pp. 415-430, ISBN 978-3-631-66719-4 (print), E- ISBN 978-3-653-06277-9 (e-book).
  12. ^ Organization of the Leibniz Society of Sciences in Berlin
personal data
SURNAME Fleischer, Lutz-Günther
BRIEF DESCRIPTION German engineer and process technician
DATE OF BIRTH July 26, 1938
PLACE OF BIRTH Gera