36 results on '"Andrea Zenker"'
Search Results
2. Regional autonomy and innovation policy
- Author
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Andrea Zenker and Elisabeth Baier
- Subjects
Regional autonomy ,Political science ,Public administration - Published
- 2020
3. Das baden-württembergische Innovationssystem im Wandel
- Author
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Thomas Stahlecker and Andrea Zenker
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0502 economics and business ,05 social sciences ,General Earth and Planetary Sciences ,050203 business & management - Abstract
Insbesondere in „reifen“ Innovationssystemen wie dem baden-wurttembergischen lassen sich in jungerer Zeit neue Innovationsformen, neue Akteure und Akteurskonstellationen beobachten, flankiert durch neue Instrumente der Innovationsunterstutzung. Vor dem Hintergrund einer weiterentwickelten Innovationssystemheuristik skizziert der vorliegende Beitrag diese neuen Entwicklungen in Baden-Wurttemberg. In exemplarischer Weise greift er charakteristische Innovationsakteure, Akteure aus der Forschungslandschaft, aus Bildung und Qualifizierung, ferner die intermediare Funktion von Mediatoren, gesellschaftliche Akteure sowie den Aspekt der Innovationsfinanzierung auf und zeigt aktuelle Tendenzen und Trends. Deutlich wird, dass sich das baden-wurttembergische Innovationssystem in den vergangenen Jahren bestandig weiterentwickelt und ausdifferenziert hat. Forschungsanstrengungen und Modernisierungsaktivitaten der Wirtschaft sowie die Gestaltung innovationsfreundlicher Politiken tragen zur Anpassungsfahigkeit des Systems bei und sind wesentliche Einflussfaktoren fur den anhaltenden Erfolg des Innovationssystems. Erganzt wird dies durch vielfaltige Neuerungen auf Akteurs‑, Institutionen- und Masnahmenebene. Es stellt sich die grundsatzliche Frage nach der Steuerungs- und Leistungsfahigkeit dieses komplexen Systems angesichts sich dynamisch verandernder globaler Umfeldbedingungen.
- Published
- 2017
4. Consolidated report on the participatory workshop results
- Author
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Henning Kroll, Andrea Zenker
- Abstract
This deliverable summarises the outcomes of the second round of participatory workshops that took place in the period May-June 2019 at the premises of DESY and ALBA, close to the ELIXIR campus and in association with the MERIL conference in Lisbon. The report includes a synopsis of, first, suggestions for indicator selection and, second, further feedback on the IA framework as expressed by RI representatives during the workshops. Thereafter, it further specifies the long-lists of indicators and impact pathways as they were finalised subsequent to these workshops. Finally, it summarises the findings from a follow-up survey in which the (first and second round) workshop participants were asked to comment on and validate the finalised long-lists. Minutes and documentation from all workshops are appended to the report.
- Published
- 2019
- Full Text
- View/download PDF
5. Literature review on socio-economic impact assessment of Research Infrastructures
- Author
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Francesco Giffoni, Torben Schubert, Henning Kroll, Andrea Zenker, Elina Griniece, Orsolya Gulyas, Jelena Angelis, Alasdair Reid, Silvia Vignetti
- Abstract
This report contains a critical literature review of the most common methodologies currently employed for the socio-economic impact assessment (IA) of research infrastructures (RIs). The review is intended to pave the way for the development of a conceptual framework IA model. There are a wide array of existing approaches and methods to assess the socio-economic impact of RI. While the majority of the reviewed approaches cover the main expected socio-economic impacts of RIs, such as the production of knowledge, human capital accumulation, increased innovation, productivity or effects on GDP, they differ in the way such impacts are measured, treated, and aggregated. Moreover, some of the reviewed methods are complementary, some are substitutes; some have broad applicability, while others are quite narrow in their scope and potential informative power. The review makes a systematic assessment based on six assessment criteria: reliability, validity, accuracy, cost/time needed, relevance for policy makers, relevance for RI managers. The review highlights that there is not a single methodological approach that can appropriately answer all the questions that a socio-economic IA addresses. Rather, a smart and rigorous combination of approaches can add value compared to existing methods.
- Published
- 2019
- Full Text
- View/download PDF
6. A conceptual approach to analysing manufacturing companies’ profiles concerning Industry 4.0 in emerging economies
- Author
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Andrea Zenker, Christian Lerch, Djerdj Horvat, Marko Mladineo, Thomas Stahlecker, and Publica
- Subjects
0209 industrial biotechnology ,Process management ,Industry 4.0 ,business.industry ,readiness ,manufacturing ,management ,emerging countries ,02 engineering and technology ,emerging country ,Industrial and Manufacturing Engineering ,020901 industrial engineering & automation ,Upgrade ,Conceptual approach ,Knowledge base ,Conceptual framework ,Artificial Intelligence ,0202 electrical engineering, electronic engineering, information engineering ,020201 artificial intelligence & image processing ,industry 4.0 ,business ,Emerging markets - Abstract
In this paper, we present a comprehensive conceptual approach to systematically analysing and monitoring the readiness of manufacturing companies for Industry 4.0 in emerging economies. This approach goes beyond an exclusive focus on technology and includes various aspects of organisation, management, employees and systemic interaction. Embedded in a conceptual framework, the approach assumes that manufacturing companies can be characterised by different “degrees of readiness for Industry 4.0”. This follows the underlying rationale of an evolutionary path towards Industry 4.0 that progresses over time and helps to upgrade companies’ technological base, as well as their organisation, knowledge base and experience.
- Published
- 2018
7. Smart specialisation strategies and cross-border integration of regional innovation systems: Policy dynamics and challenges for the Upper Rhine
- Author
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Teemu Makkonen, Esther Schnabl, Jean-Alain Héraud, Emmanuel Muller, Andrea Zenker, Henning Kroll, Miriam Hufnagl, Bureau d'Économie Théorique et Appliquée (BETA), Institut National de la Recherche Agronomique (INRA)-Université de Strasbourg (UNISTRA)-Université de Lorraine (UL)-Centre National de la Recherche Scientifique (CNRS), Fraunhofer Institute for Systems and Innovation Research (Fraunhofer ISI ), University of Tampere [Finland], Publica, Université de Lorraine (UL)-Université de Strasbourg (UNISTRA)-Institut National de la Recherche Agronomique (INRA)-Centre National de la Recherche Scientifique (CNRS), and Fraunhofer (Fraunhofer-Gesellschaft)
- Subjects
Public Administration ,05 social sciences ,Geography, Planning and Development ,0211 other engineering and technologies ,021107 urban & regional planning ,Context (language use) ,02 engineering and technology ,regional development ,Management, Monitoring, Policy and Law ,Environmental Science (miscellaneous) ,[SHS.ECO]Humanities and Social Sciences/Economics and Finance ,Innovation policy ,Economy ,Regional development ,Dynamics (music) ,Political science ,0502 economics and business ,Regional science ,European commission ,050203 business & management ,smart specialisation S3 ,smart specialisation - Abstract
International audience; The aim of this paper is to provide insights into the implications of the European Commission’s smart specialisation agenda in a specific, cross-border context. The paper critically reflects on some of the RIS3 (research and innovation strategies for smart specialisation) agenda’s premises by illustrating its practical implementation in the Upper Rhine area (i.e. Alsace in France and Baden-Württemberg in Germany). The first section revisits not only the smart specialisation concept in itself but also discusses it vis-à-vis the thematic of cross-border regional innovation systems and outlines some implications that it may have for the choice of innovation policy instruments. The second section introduces the specific framework of the Upper Rhine area and outlines possible options for the co-ordination of innovation policies on the basis of a yet to be developed, theoretically possible joint RIS3 strategy. The last section brings together these conceptual and applied perspectives on smart specialisation and outlines suggestions for progressive cross-border integration via regional innovation policies.
- Published
- 2017
8. Are Innovation Systems Complex Systems?
- Author
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Jean-Alain Héraud, Emmanuel Muller, and Andrea Zenker
- Subjects
Risk analysis (engineering) ,Computer science ,Order (business) ,Complex system ,Perfect competition ,Innovation system - Abstract
Basically, complex systems are defined as a large number of autonomous entities in interaction, that create several levels of collective organization leading to emergent (and immergent) behavior. In short, complex systems are characterized by the observation that the whole is more than the sum of the parts (Aristotle). The aim of this paper is to address the issue of innovation systems in order to determine by how much they constitute complex systems.
- Published
- 2016
9. R&D : la coopération franco-allemande dans la pratique
- Author
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Andrea Zenker, Volker Tippmann, and Elisabeth Baier
- Subjects
General Arts and Humanities - Abstract
L’analyse que nous presentons ici est le fruit de l’experience de la cooperation franco-allemande en matiere de recherche. Elle reflete le vecu des chercheurs, directeurs de recherche et responsables de programmes de recherche bilateraux interroges par l’Institut Fraunhofer ISI dans le cadre de l’accompagnement des programmes bilateraux entre instituts Fraunhofer et Carnot (Zenker et al., 2013a), mandate par le ministere federal de la Recherche. La principale conclusion en est que le succes d’une cooperation bilaterale en matiere de recherche depend d’une maniere essentielle de facteurs individuels, institutionnels et politiques. En effet, la difficulte que pose la gestion d‘un financement conjoint, conjuguee aux differences culturelles, exige de la part des membres des equipes de recherche impliquees des capacites organisationnelles et manageriales prononcees, ainsi qu’une grande ouverture a l’autre, doublee d’une profonde tolerance, lorsqu’ils developpent une approche commune du projet pour le realiser au quotidien. Or ce qui semble a premiere vue un ‘surcroit de travail’ se revele en realite tres fructueux parce qu’il elargit l’acces a des infrastructures et a des savoirs existants, mene a une comprehension plus approfondie et plus intime des enjeux de l’interculturel, et favorise l’acces aux reseaux personnels des participants comme des marches dans le pays partenaire. Apres avoir rappele l’importance d’une intensification de la cooperation transfrontieres dans le domaine de la recherche, nous expliciterons les specificites inherentes a la cooperation franco-allemande, telles qu’elles sont apparues dans l’experience concrete des cooperations etudiees. Enfin, dans une analyse integrant les dimensions personnelles, institutionnelles et politiques ou societales, nous en presenterons les facteurs de succes comme les handicaps, et nous en tirerons quelques conclusions pour optimiser la cooperation bilaterale dans le domaine de la recherche.
- Published
- 2013
10. Recherche appliquée en RFA. Société Fraunhofer : la R&D au service de l’industrie
- Author
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Andrea Zenker and Volker Tippmann
- Subjects
General Arts and Humanities - Abstract
Les PME industrielles allemandes sont reputees pour etre particulierement innovantes. Si elles pratiquent souvent la RD enfin, nous presenterons ses activites hors des frontieres, plus particulierement en France.
- Published
- 2011
11. La perception de l'environnement régional d'innovation par les entreprises de services à forte intensité de connaissance : une comparaison internationale
- Author
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Andrea Zenker, David Doloreux, and Emmanuel Muller
- Subjects
perception, regions, knowledge intensive business services (KIBS), innovation, Alsace, Baden, Lower St, Lawrence, Beauce ,General Medicine - Abstract
La presente contribution se propose d’analyser comment une region ou plus precisement les acteurs et les activites constituant l’environnement de la firme est percue par les firmes qui y sont situees, et si ces perceptions sont liees aux phenomenes d’innovation. Dans ce contexte, la question qui est posee est celle de l’existence – ou non – de comportements d’innovation et/ou de perceptions par les firmes qui caracterisent et distinguent les entreprises de differentes regions. L’analyse concerne un echantillon de petites et moyennes entreprises du secteur des services a forte intensite de connaissances localisees dans deux regions voisines appartenant a des contextes nationaux differents en Europe (Alsace et pays de Bade) et deux regions canadiennes (Bas-Saint-Laurent et Beauce au Quebec).
- Published
- 2009
12. The effect of sample treatment on separation profiles of tear fluid proteins: Qualitative and semi-quantitative protein determination by an automated analysis system
- Author
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Gabriele Trummer, Otto Schmut, Andrea Zenker, and Jutta Horwath-Winter
- Subjects
Time Factors ,Chromatography ,Clinical Laboratory Techniques ,Chemistry ,Aqueous humour ,Capillary action ,Sample (material) ,Temperature ,Buffers ,High-performance liquid chromatography ,eye diseases ,Sensory Systems ,Aqueous Humor ,Automation ,Cellular and Molecular Neuroscience ,Ophthalmology ,Tears ,Protein purification ,Humans ,Electrophoresis, Polyacrylamide Gel ,sense organs ,Eye Proteins ,Bradford protein assay ,Polyacrylamide gel electrophoresis ,Quantitative analysis (chemistry) - Abstract
Purpose. Qualitative and quantitative determination of tear fluid components is of increasing interest in ophthalmology. Until now, for diagnosis and course control of some diseases of the anterior parts of the eye, different methods for tear fluid protein analysis are available. Results can be obtained by polyacrylamide gel electrophoresis (PAGE), immunochemistry, and high-performance liquid chromatography (HPLC). A new method for protein separation, identification and semi-quantitative determination on a chip-based micro-fluidic technique is used for the first time to investigate tear fluids. Methods. Normal human reflex tears were obtained by stimulation with China mint oil and collected using glass capillary tubes. A lab-on-a-chip technology (developed by Agilent Technologies, Waldbronn, Germany, in co-operation with Caliper Technologies, Mountain View, California, USA) was used for separation and semi-quantitative determination of tear proteins. Tear fluid was separated on the Agilent 2100 Bioanalyzer in combination with the Protein 200 LabChip kit and the dedicated protein assay software. Time and temperature of the incubation with sample buffer were varied, and the influence of these parameters on protein separation profiles was studied. Tear proteins were also analysed by PAGE, and the results obtained by both methods were compared. Results. The different proteins of tear fluid can be separated by the Agilent 2100 Bioanalyzer method in very short time. By this method, the molecular weight as well as the concentration of proteins can be determined. Data are automatically stored in digital format and can be retrieved and shared. Results of this technology were comparable with the protein pattern obtained by PAGE. It was confirmed by both methods that, depending on incubation time of tear fluid with sample buffer and on temperature, different protein pattern can be obtained from the tears of one specimen. Conclusion. Tear proteins – in contrast to serum or aqueous humour proteins – are very sensitive to changes in sample buffer temperature as well as incubation time with buffer. To obtain comparable results for tear fluid proteins, the sample buffer applied and the incubation time and temperature must be observed carefully. This can be demonstrated by both the new Agilent 2100 Bioanalyzer method and PAGE. These results are of importance when comparing tear fluid protein pattern for the diagnosis and course control of dry-eye syndrome and of other diseases of the anterior part of the eye.
- Published
- 2002
13. Knowledge Angels, Creative Behaviors, and Emerging Innovation Modes
- Author
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Andrea Zenker, Emmanuel Muller, and José-Carlos Ramos
- Subjects
Engineering ,Knowledge management ,business.industry ,Public relations ,business - Published
- 2014
14. Reaction monitoring of platinum(II) complex–5′‐guanosine monophosphate adduct formation by ion exchange liquid chromatography/electrospray ionization mass spectrometry
- Author
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Andrea Zenker, Bernhard K. Keppler, Wolfgang Lindner, Markus Galanski, and Peter Zöllner
- Subjects
chemistry.chemical_compound ,Chromatography ,Chemistry ,Liquid chromatography–mass spectrometry ,Electrospray ionization ,Guanosine monophosphate ,Ion chromatography ,Guanosine ,chemistry.chemical_element ,Mass spectrometry ,Platinum ,Spectroscopy ,Adduct - Abstract
Cisplatin and four structurally related platinum(II) complexes were incubated with guanosine 5'-monophosphate (5'-GMP) in water at 37 degrees C. The adduct formation reactions were monitored with cation- and anion-exchange liquid chromatography/electrospray ionization mass spectrometry. In addition to mono- and bis-adducts of guanosine 5'-monophosphate with the platinum(II) complexes, other molecular species, presumably with a binuclear structure (two platinum(II) centres), were detected in the reaction mixtures, which have not been reported previously, indicating an unexpected complexity of adduct formation. Anion-exchange chromatography revealed the presence of isomers of two complexes which presumably result from the restricted rotation at the platinum-- N-7 (5'-GMP) bonds. All reaction products were characterized in both the positive and negative ion modes. Furthermore, preliminary kinetics and half-times of complex formation were investigated for cisplatin and two other platinum(II) complexes, monitoring the relative concentrations of free 5'-GMP and of mono- and bis-GMP adducts as a function of time (250 h) using an internal standard protocol with thymidine 5'-monophosphate.
- Published
- 2001
15. Capillary electrophoretic study of carboplatin and analogues with nucleoside monophosphates, di- and trinucleotides
- Author
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Markus Galanski, Bernhard K. Keppler, Angelika Küng, and Andrea Zenker
- Subjects
Magnetic Resonance Spectroscopy ,Guanosine Monophosphate ,Oligonucleotides ,Antineoplastic Agents ,Ligands ,Biochemistry ,Medicinal chemistry ,Carboplatin ,Adduct ,Inorganic Chemistry ,chemistry.chemical_compound ,Capillary electrophoresis ,Cytidine Monophosphate ,Thymidine Monophosphate ,medicine ,Humans ,Organic chemistry ,Nucleotide ,Carboxylate ,Cisplatin ,chemistry.chemical_classification ,Chemistry ,Electrophoresis, Capillary ,DNA ,Nuclear magnetic resonance spectroscopy ,Adenosine Monophosphate ,Spectrophotometry, Ultraviolet ,Nucleoside ,medicine.drug - Abstract
Carboplatin (cis-diammine-1,1-cyclobutane-dicarboxylatoplatinum(II)) is the only cisplatin (cis-diammine-dichloroplatinum(II)) derivative currently available for the treatment of cancer worldwide. The higher stability of the carboxylate ligand compared to the coordinated chloride in cisplatin results in a reduced reactivity of the molecule. Capillary electrophoresis has been applied for investigating the adduct formation of carboplatin and analogues with nucleoside monophosphates, di- and trinucleotides. Adduct formation results in a significant shift of the absorption maximum to lower energy compared to free nucleotides. Therefore, characterization of the analytes was performed by UV additionally to NMR spectroscopy. A preference for GMP- and AMP-coordination was found. The ability of separating all four common nucleotides and their major platinum adducts in a single run demonstrates the suitability of CE for this kind of investigations.
- Published
- 2001
16. Kinetics of binding properties of 5′-GMP with cisplatin under simulated physiological conditions by capillary electrophoresis
- Author
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Markus Galanski, Bernhard K. Keppler, Thomas L. Bereuter, Wolfgang Lindner, and Andrea Zenker
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chemistry.chemical_classification ,Magnetic Resonance Spectroscopy ,Chromatography ,Kinetics ,Guanosine Monophosphate ,Electrophoresis, Capillary ,General Chemistry ,Nuclear magnetic resonance spectroscopy ,Phosphate ,Adduct ,Amino acid ,chemistry.chemical_compound ,Hydrolysis ,Methionine ,Capillary electrophoresis ,Chlorides ,chemistry ,Cysteine ,Cisplatin - Abstract
Kinetics of the adduct formation of cisplatin and its hydrolysis products with 5′-GMP was investigated using capillary electrophoresis (CE) under ‘simulated physiological conditions’. Therefore, chloride ion and phosphate concentration as well as the pH were chosen comparable to intracellular conditions. Furthermore, the influence of the sulfur-containing α-amino acids l -methionine and l -cysteine on the kinetics of the adduct formation have been studied. Both amino acids increased the half-time of the reaction significantly but did not influence the formation of the major adduct cis-[Pt(NH3)2(N7-GMP)2]2−. The reaction products were separated using CE, and characterised using UV and NMR spectroscopy.
- Published
- 2000
17. Innovation Networks : Concepts and Challenges in the European Perspective
- Author
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Knut Koschatzky, Marianne Kulicke, Andrea Zenker, Knut Koschatzky, Marianne Kulicke, and Andrea Zenker
- Subjects
- Engineering, Business, Management science, Economics, Economic development, Technological innovations
- Abstract
Innovation networks are a major source for acquiring new information and knowledge and thus for supporting innovation processes. Despite the many theoretical and empirical contributions to the explanation of networks, many questions still remain open. For example: How can networks, if they do not emerge by their own, be initiated? How can fragmentation in innovation systems be overcome? And how can networking experience from market economies be transferred to the emerging economies of Central and Eastern Europe? By presenting a selection of papers which address innovation networking from theoretical and political viewpoints, the book aims at giving answers to these questions.
- Published
- 2012
18. RAP1-mediated MEK/ERK pathway defects in Kabuki syndrome
- Author
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Karabey, Hülya Kayserili (ORCID 0000-0003-0376-499X & YÖK ID 7945), Boegershausen, Nina; Tsai, I-Chu; Pohl, Esther; Kiper, Pelin Özlem Şimşek; Beleggia, Filippo; Percin, E. Ferda; Keupp, Katharina; Matchan, Angela; Milz, Esther; Alanay, Yasemin; Liu, Yicheng; Banka, Siddharth; Kranz, Andrea; Zenker, Martin; Wieczorek, Dagmar; Elçioğlu, Nursel; Prontera, Paolo; Lyonnet, Stanislas; Meitinger, Thomas; Stewart, A. Francis; Donnai, Dian; Strom, Tim M.; Boduroğlu, Koray; Yiğit, Gökhan; Li, Yun; Katsanis, Nicholas; Wollnik, Bernd, School of Medicine, Department of Medical Genetics, Karabey, Hülya Kayserili (ORCID 0000-0003-0376-499X & YÖK ID 7945), Boegershausen, Nina; Tsai, I-Chu; Pohl, Esther; Kiper, Pelin Özlem Şimşek; Beleggia, Filippo; Percin, E. Ferda; Keupp, Katharina; Matchan, Angela; Milz, Esther; Alanay, Yasemin; Liu, Yicheng; Banka, Siddharth; Kranz, Andrea; Zenker, Martin; Wieczorek, Dagmar; Elçioğlu, Nursel; Prontera, Paolo; Lyonnet, Stanislas; Meitinger, Thomas; Stewart, A. Francis; Donnai, Dian; Strom, Tim M.; Boduroğlu, Koray; Yiğit, Gökhan; Li, Yun; Katsanis, Nicholas; Wollnik, Bernd, School of Medicine, and Department of Medical Genetics
- Abstract
The genetic disorder Kabuki syndrome (KS) is characterized by developmental delay and congenital anomalies. Dominant mutations in the chromatin regulators lysine (K)-specific methyltransferase 2D (KMT2D) (also known as MLL2) and lysine (K)-specific demethylase 6A (KDM6A) underlie the majority of cases. Although the functions of these chromatin-modifying proteins have been studied extensively, the physiological systems regulated by them are largely unknown. Using whole-exome sequencing, we identified a mutation in RAP1A that was converted to homozygosity as the result of uniparental isodisomy (UPD) in a patient with KS and a de novo, dominant mutation in RAP1B in a second individual with a KS-like phenotype. We elucidated a genetic and functional interaction between the respective KS-associated genes and their products in zebrafish models and patient cell lines. Specifically, we determined that dysfunction of known KS genes and the genes identified in this study results in aberrant MEK/ERK signaling as well as disruption of F-actin polymerization and cell intercalation. Moreover, these phenotypes could be rescued in zebrafish models by rebalancing MEK/ERK signaling via administration of small molecule inhibitors of MEK. Taken together, our studies suggest that the KS pathophysiology overlaps with the RASopathies and provide a potential direction for treatment design., German Federal Ministry of Education and Research (BMBF); E-RARE network CRANIRARE-2; national rare disease network FACE; Scientific and Technological Research Council of Turkey (TÜBİTAK); NIH; NRSA; Else Kroner-Fresenius-Stiftung
- Published
- 2015
19. Negative and positive ion matrix-assisted laser desorption ionization mass spectrometry of peptidoglycan fragments after size fractionation and reversed-phase high-performance liquid chromatography
- Author
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Wolfgang Löffelhardt, Beatrix Pfanzagl, Andrea Zenker, and Günter Allmaier
- Subjects
Microbiology (medical) ,Chromatography ,Molecular mass ,Size-exclusion chromatography ,Analytical chemistry ,Mass spectrometry ,Microbiology ,High-performance liquid chromatography ,law.invention ,Gel permeation chromatography ,chemistry.chemical_compound ,Matrix-assisted laser desorption/ionization ,chemistry ,Reflectron ,law ,Peptidoglycan ,Molecular Biology - Abstract
In this paper, we outline a general applicable matrix-assisted laser desorption ionization (MALDI) mass spectrometry (MS)-based strategy for the characterization of sodium borohydride-reduced peptidoglycan fragments (dimeric up to oligomeric fragments) derived from muramidase-digested murein. As an example, murein isolated from the cyanelles of the photoautotrophic Cyanophora paradoxa was selected. Separation of unreduced peptidoglycan fragments (generated by muramidase digestion) by gel filtration divided them into muropeptides according to their sizes (degree of polymerization). Afterwards, the pooled fractions were reduced by NaBH 4 and isolation of the individual peptidoglycan fragments was performed by reversed-phase high-performance liquid chromatography (RP HPLC), with a sodium- or potassium phosphate-containing water–methanol gradient giving the maximal separation efficiency. For determining the exact molecular masses of these individual components, MALDI MS proved to be the most sensitive mass spectrometric technique for these salt-containing samples. A desalting step based on a further HPLC step, using a water–acetonitrile–trifluoroacetic acid gradient turned out to be very helpful for the molecular mass determination, especially of large peptidoglycan fragments (molecular weight range >3500 Da), which were present in very small quantities, but were not absolutely necessary. In the negative ion, reflectron mode, we could achieve the best signal-to-noise ratio and a mass accuracy of −0.03 to +0.1% for deprotonated molecular ions. The combined results from negative (and positive ion) MALDI MS in the reflectron mode, gel chromatography, HPLC and amino acid/sugar analysis (on the total hydrolysate of the purified murein) allowed us to deduce the primary structure of dimeric up to tetrameric peptidoglycan fragments isolated from the cyanelle murein of C. paradoxa .
- Published
- 1998
20. Bet v 1, the major birch pollen allergen, conjugated to crystalline bacterial cell surface proteins, expands allergen-specific T cells of the Th1/Th0 phenotype in vitro by induction of IL-12
- Author
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Uwe B. Sleytr, Paul Messner, Christof Ebner, B. Jahn-Schmid, Otto Scheiner, Barbara Bohle, Andrea Zenker, Dietrich Kraft, Ute Siemann, and Frank M. Unger
- Subjects
Interferon type II ,T-Lymphocytes ,medicine.medical_treatment ,T cell ,Immunology ,Epitopes, T-Lymphocyte ,Biology ,Gram-Positive Bacteria ,Lymphocyte Activation ,medicine.disease_cause ,Peripheral blood mononuclear cell ,Microbiology ,Interferon-gamma ,Allergen ,Adjuvants, Immunologic ,Bacterial Proteins ,Antigen ,T-Lymphocyte Subsets ,medicine ,Humans ,Immunology and Allergy ,Plant Proteins ,Membrane Proteins ,General Medicine ,Allergens ,Antigens, Plant ,medicine.disease ,Interleukin-12 ,Phenotype ,Cytokine ,medicine.anatomical_structure ,Interleukin 12 ,Cytokines ,Pollen ,Epitope Mapping ,Type I hypersensitivity ,medicine.drug - Abstract
Modulation of allergic immune responses by using adequate adjuvants is a promising concept for future immunotherapy of type I hypersensitivity. In the present study, recombinant Bet v 1 (rBet v 1, the major birch pollen allergen) was conjugated to cross-linked crystalline surface layer proteins (SL) derived from Gram-positive eubacteria. T cell lines (TCL) and clones (TCC) were established from peripheral blood of birch pollen-allergic patients. TCL and TCC were induced either using rBet v 1 alone or rBet v 1/SL conjugates (rBet v 1/SL) as initial antigen stimulus. Cytokine production after re-stimulation with rBet v 1 was investigated. TCL initiated with rBet v 1/SL showed significantly increased IFN-gamma production as compared to rBet v 1 -selected TCL. TCC were established from TCL of five patients. As expected, the majority of CD4+ TCC induced by rBet v 1 (55%) displayed a Th2-like pattern of cytokine production. However, only 21% of Bet v 1-specific TCC isolated from TCL established with the Bet v 1/SL revealed this phenotype. The majority of SL-specific TCC (80%) belonged to the Th1 phenotype. In cultures of peripheral blood mononuclear cells, both, SL and Bet v 1/SL (but not rBet v 1) stimulated the production of high levels of IL-12, a pivotal mediator of Th1 responses. Moreover, stimulation of rBet v 1-induced TCC with rBet v 1/SL led to an increased IFN-gamma production. This effect could be reversed by neutralizing anti-IL-12 mAb. Together these results indicate an adjuvant effect of SL mediated by IL-12. Our results indicate that bacterial components, such as SL, displaying adjuvant effects may be suitable for immunotherapeutical vaccines for type I allergy.
- Published
- 1997
21. Innovation, territories and creativity: some refl ections about usual and less usual instruments for innovation-driven regional policies EMM ANU EL MU LLER, J EA N-A LA I N HÉR AU DAND
- Author
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Andrea Zenker, Emmanuel Muller, and Jean-Alain Héraud
- Subjects
media_common.quotation_subject ,Political science ,Welfare economics ,Creativity ,media_common - Published
- 2013
22. Characterization of Peptidoglycan Trimers after Gel Chromatography and Reversed-phase High-performance Liquid Chromatography by Positive-ion Plasma Desorption Mass Spectrometry
- Author
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Günter Allmaier, Ernst Pittenauer, Wolfgang Löffelhardt, Beatrix Pfanzagl, and Andrea Zenker
- Subjects
chemistry.chemical_classification ,Chromatography ,Amino sugar ,biology ,Organic Chemistry ,Size-exclusion chromatography ,biology.organism_classification ,Mass spectrometry ,High-performance liquid chromatography ,Analytical Chemistry ,Gel permeation chromatography ,chemistry.chemical_compound ,chemistry ,Desorption ,Peptidoglycan ,Cyanophora paradoxa ,Spectroscopy - Abstract
A strategy for the primary stucture characterization of reduced peptidoglycan trimers derived from muramidase-digested murein (e.g. isolated from the cyanelles of Cyanophora paradoxa) is outlined. First, muropeptides are separated by gel filtration according to their size (degree of cross-linking). This step is followed by reduction with sodium borohydride and reversed-phase high-performance liquid chromatography (HPLC). Trimeric and oligomeric compounds (molecular weight range 2500–4500 Da), in particular, are present in small quantities and therefore sophisticated methods for characterization are required due to the biological importance of these components. For determining moecular weight with high accuracy, positive-ion plasma desorption mass spectrometry (PDMS) proves to be a well-suited analytical method with sufficient sensitivity (medium picomole range) and mass accuracy (±0.04%). Based on combined data from PDMS, gel chromatography, HPLC and amino acid and amino sugar analyses, the primary structure of peptidoglycan trimeric compounds could be determined unambiguously.
- Published
- 1996
23. Primary structure of cyanelle peptidoglycan of Cyanophora paradoxa: a prokaryotic cell wall as part of an organelle envelope
- Author
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M A de Pedro, Wolfgang Löffelhardt, Beatrix Pfanzagl, Andrea Zenker, Ernst Pittenauer, Jorge L. Martínez-Torrecuadrada, Erich R. Schmid, and Günter Allmaier
- Subjects
biology ,Molecular mass ,Molecular Sequence Data ,Size-exclusion chromatography ,Eukaryota ,Peptidoglycan ,Cyanophora ,Diaminopimelic Acid ,biology.organism_classification ,Mass spectrometry ,Microbiology ,Cell wall ,chemistry.chemical_compound ,Carbohydrate Sequence ,chemistry ,Biochemistry ,Cell Wall ,Amino Acid Sequence ,Plastids ,Amino Acids ,Cyanophora paradoxa ,Molecular Biology ,Organelle envelope ,Research Article - Abstract
The peptidoglycan layer surrounding the photosynthetic organelles (cyanelles) of the protist Cyanophora paradoxa is thought to be a relic of their cyanobacterial ancestors. The separation of muropeptides by gel filtration and reverse-phase high-performance liquid chromatography revealed four different muropeptide monomers. A number of muropeptides were identical in retention behavior to muropeptides of Escherichia coli, while others had remarkably long retention times with respect to their sizes, as indicated by gel filtration. Molecular mass determination by plasma desorption and matrix-assisted laser desorption ionization mass spectrometry showed that these unusual muropeptides had molecular masses greater by 112 Da or a multiple thereof than those of ones common to both species. Fast atom bombardment-tandem mass spectrometry of these reduced muropeptide monomers allowed the localization of the modification to D-glutamic acid. High-resolution fast atom bombardment-mass spectrometry and amino acid analysis revealed N-acetylputrescine to be the substituent (E. Pittenauer, E. R. Schmid, G. Allmaier, B. Pfanzagl, W. Löffelhardt, C. Quintela, M. A. de Pedro, and W. Stanek, Biol. Mass Spectrom. 22:524-536, 1993). In addition to the 4 monomers already known, 8 dimers, 11 trimers, and 6 tetramers were characterized. An average glycan chain length of 51 disaccharide units was determined by the transfer of [U-14C]galactose to the terminal N-acetylglucosamine residues of cyanelle peptidoglycan. The muropeptide pattern is discussed with respect to peptidoglycan biosynthesis and processing.
- Published
- 1996
24. Knowledge Angels, Creative Behaviors, and Emerging Innovation Modes: Observations from Alsace, Baden-Württemberg, and Catalonia
- Author
-
Emmanuel Muller, José-Carlos Ramos, and Andrea Zenker
- Subjects
Professional knowledge ,Engineering ,Knowledge management ,Business process ,business.industry ,media_common.quotation_subject ,Baden wurttemberg ,Public sector ,Product (business) ,Economy ,Service (economics) ,business ,Virtual community ,media_common - Abstract
The undeniable importance of knowledge and innovation in modern economies justifies the increasing interest that scholars are taking in studying knowledge-intensive business services (KIBS). Since the mid 1990s, there has been a significant increase in the attention paid to KIBS and their role and functions in innovation systems (Illeris, 1991; Miles et al. 1995; den Hertog, 2000; Strambach, 2001; Muller and Zenker, 2001; Wood, 2002a; Tether, 2005). In general terms, the activity of KIBS can be mainly described as the provision of knowledge-intensive inputs to the business process of other organizations, private as well as public sector clients. In more precise terms, Miles et al. (1995, p. 18) define KIBS as “services that involve economic activities which are intended to result in the creation, accumulation or dissemination of knowledge.” Den Hertog (2000, p. 505) emphasizes professional knowledge as basic for KIBS’ professional activities, “i.e. knowledge or expertise related to a specific (technical) discipline or (technical) functional-domain to supply intermediate products and services that are knowledge-based”, while Bettencourt et al. (2002, pp. 100–1) focus on the accumulation, creation, and dissemination of knowledge “for the purpose of developing a customized service or product solution to satisfy the client’s needs.”
- Published
- 2012
25. Regional Embeddedness of Multinational Enterprises in European Regions
- Author
-
Elisabeth Baier, Andrea Zenker, and Knut Koschatzky
- Subjects
Internationalization ,Embeddedness ,Tacit knowledge ,business.industry ,Multinational corporation ,Distribution (economics) ,Homeland ,Business ,Market environment ,Product (category theory) ,Economic system ,Industrial organization - Abstract
It is often argued that multinational enterprises (MNEs) act space-less in the global economy and that they are an essential mechanism in the internationalization of the transfer of knowledge and technologies. The existence of international inner-organizational learning and synergy effects distinguishes MNEs from market-based exchange relationships and national companies (The Oxford Handbook of Innovation, 2005). With their knowledge accumulating and processing capacities, MNEs can use product, production, distribution, and development competences, which they accumulated in their homeland and in all other socio-cultural and institutional contexts where branch plants are located. In this respect, MNEs can combine the advantages of globally-coordinated product and production strategies with the advantages of local proximity and specific locational factors (Management International Review 40:127–148, 2000).
- Published
- 2011
26. Regional innovation capacities in new member states: A typology
- Author
-
Arlette Jappe, Jean-Alain Héraud, Andrea Zenker, David Doloreux, Emmanuel Muller, and Publica
- Subjects
Typology ,Sociology and Political Science ,Member states ,regional development ,innovation ,new member state ,Regional development ,Political science ,regional innovation system ,Political Science and International Relations ,Regional science ,media_common.cataloged_instance ,Economic system ,European union ,typology ,media_common - Abstract
The paper examines the characteristics and performance of regional innovation systems in 12 new member states of the European Union. More specifically, it develops a typology that differentiates their various potentials as innovative regions. Based on a principal component analysis, five different groups of regions are identified. The characteristic profile of each group is detailed and exploration of possible paths of innovation‐based regional development is presented for each type of region. The paper concludes with an examination of policy implications emerging from the analysis.
- Published
- 2008
27. KIBS, perceptions and innovation patterns
- Author
-
Andrea Zenker, David Doloreux, and Publica
- Subjects
Marketing ,Knowledge management ,region ,business.industry ,Strategy and Management ,media_common.quotation_subject ,Frame (networking) ,General Engineering ,Knowledge-Intensive Business Services (KIBS) ,perception ,Alsace ,innovation ,Computer Science Applications ,Variable (computer science) ,Regional development ,Perception ,Workforce ,Regional science ,Baden ,business ,media_common - Abstract
This research note aims at analysing how different types of firms and their representatives in different regions view their respective environments. The analysis relies on three 'perception variables', two of them related to specific aspects of the regional conditions with respect to firms' innovation activities: research and technology, and the workforce. The third perception variable, i.e., the regional innovation climate, is more general and summarises the overall frame of the innovation conditions in the region.
- Published
- 2008
28. A regional typology of innovation capacities in new member states and candidate countries
- Author
-
Emmanuel MULLER, Arlette JAPPE, Jean-Alain HERAUD, and Andrea ZENKER
- Published
- 2006
29. Introducing Regions and Innovation-related Needs in the Multi-layer Logic of the European Research Area
- Author
-
Emmanuel Muller, Andrea Zenker, and Jean-Alain Héraud
- Published
- 2003
30. Regional Innovation Capacities and Economic Transition: The Example of West Transdanubia
- Author
-
Emmanuel Muller, Andrea Zenker, and Tibor Döry
- Subjects
Typology ,Politics ,Section (archaeology) ,Transition (fiction) ,Service (economics) ,media_common.quotation_subject ,Economics ,Manufacturing firms ,Economic geography ,Economic system ,Regional innovation system ,media_common - Abstract
In the literature devoted to interrelations between innovative firms and economic transition, only little attention has been paid to the influence of regional determinants. In line with the current academic and political debates on the role of regions for competitiveness and economic development, the aim of this paper is to provide some insights on innovation activities from a regional perspective. The investigation deals primarily with a Hungarian region: West Transdanubia. More precisely, the analysis focuses on firm behaviours and characteristics with regards to innovation and cooperation, determining remarkable facts on an empirical basis. This in turn enables a typology of regional firms to be established which may be helpful for innovation policy in West Transdanubia. The paper is organised as follows. The first section reviews the background of the analysis, addressing the concept of innovation systems and economic changes from a regional perspective. The second section, concentrating on manufacturing firms, contrasts innovation and co-operation patterns in West Transdanubia with two other central European regions (Saxony and Slovenia) allowing the introduction of comparative elements into the investigation. The third section examines the innovation and co-operation activities of manufacturing and business service firms in West Transdanubia. Finally, concluding comments explore policy implications, insisting notably on the current and future importance of regional innovation capacities.
- Published
- 2002
31. Networking of Small Firms: Is the Region a Knowledge Source for Innovation?
- Author
-
Andrea Zenker and Knut Koschatzky
- Subjects
Knowledge management ,Work (electrical) ,Absorptive capacity ,business.industry ,Phenomenon ,Scale (social sciences) ,Neoclassical economics ,business ,Small firm - Abstract
The debate about whether small or large firms are more innovative, and whether size is a useful criterion for distinguishing the differences in the intensity and kind of innovative activity is not a recent phenomenon. It can be traced back to the pioneering work of Schumpeter, who in his early work emphasised the risk-taking behaviour of pioneer entrepreneurs in enhancing the supply of innovative solutions (Schumpeter 1911). He later argued that large firms can devote more resources to systematic research and development (R&D) and are therefore more innovative than small firms due to scale advantages (Schumpeter 1942). These two hypotheses were summarised by Freeman in the models of entrepreneurial innovation (Mark I) and of large-firm managed innovation (Mark II) (Freeman 1982).
- Published
- 2002
32. Business services as actors of knowledge transformation: The role of KIBS in regional and national innovation systems
- Author
-
Andrea Zenker, Emmanuel Muller, and Publica
- Subjects
search ,knowledge ,Process management ,learning ,Process (engineering) ,Strategy and Management ,media_common.quotation_subject ,personal and professional service ,technological change ,Management Science and Operations Research ,Regional innovation system ,innovation and invention ,Knowledge production ,information ,Knowledge generation ,National innovation system ,Management of Technology and Innovation ,Position (finance) ,Business ,Knowledge transformation ,Function (engineering) ,Industrial organization ,media_common - Abstract
Over the last years, there has been a significant increase in the attention paid to the activities of knowledge-intensive business services (KIBS). KIBS produce and diffuse knowledge, which is crucial for innovation processes. The paper gives an overview of the role and function of KIBS in innovation systems and their knowledge production, transformation and diffusion activities. Focusing on innovation interactions between manufacturing small- and medium-sized enterprises (SMEs) and KIBS, the empirical analyses grasps KIBS position in five regional contexts. The analysis leads to the conclusion that innovation activities link SMEs and KIBS through the process of knowledge generation and diffusion.
- Published
- 2001
33. Innovation, Interaction and Regional Development: Structural Characteristics of Regional Innovation Strategies
- Author
-
Andrea Zenker
- Subjects
Globalization ,Regional development ,Tacit knowledge ,Competitive pressure ,Business ,Economic geography ,Innovation system ,Economic system ,Regional innovation system - Abstract
In the light of globalisation, increasing industrial specialisation, and growing competitive pressure, innovative developments and processes have reached a level of primary importance. New products and processes, as well as organisational and societal innovations, contribute to firms’, regions’, and nations’ competitiveness. Considering innovative processes on a regional level provides insights into space-specific economic, historical, socio-political and cultural factors which form the background of industrial innovation processes. The region in which innovating firms are located represents their "home base" and here interactive relationships lead to the development of specific innovation patterns.
- Published
- 2001
34. Time-dependent interactions of platinum(II) complexes with 5'-GMP under simulated physiological conditions studies by capillary electrophoresis
- Author
-
Andrea Zenker, Wolfgang Lindner, Thomas L. Bereuter, Bernhard K. Keppler, and Markus Galanski
- Subjects
Denticity ,Time Factors ,Intramolecular reaction ,Guanosine Monophosphate ,chemistry.chemical_element ,Ligands ,Biochemistry ,Chloride ,Adduct ,Inorganic Chemistry ,Capillary electrophoresis ,Polymer chemistry ,medicine ,Molecule ,Organic chemistry ,Humans ,Nuclear Magnetic Resonance, Biomolecular ,Platinum ,Molecular Structure ,Electrophoresis, Capillary ,DNA ,Electrophoresis ,chemistry ,Spectrometry, Mass, Matrix-Assisted Laser Desorption-Ionization ,Cisplatin ,medicine.drug - Abstract
The binding behaviour as well as the time-dependent reaction of five platinum(II) complexes with 5'-GMP have been investigated by capillary electrophoresis under simulated physiological conditions referred to chloride concentration, pH and temperature. Different amine ligands influenced the binding properties towards 5'-GMP and resulted in different half-times of the overall reaction. Complexes with bidentate ligands reacted faster with the monophosphate compared to complexes with monodentate ligands. Complexes consisting of two monodentate hydroxyethylamine ligands reacted very slowly owing to a competitive intramolecular reaction of the hydroxyethyl residues, which was proven by NMR investigations. Reducing the number of hydroxyethyl residues increased the half-times of the reactions. Moreover, the major adducts formed with 5'-GMP were identified by MALDI-MS analysis.
- Published
- 2000
35. Capillary electrophoretic study of cisplatin interaction with nucleoside monophosphates, di- and trinucleotides
- Author
-
Bernhard K. Keppler, Wolfgang Lindner, Markus Galanski, Andrea Zenker, and Thomas L. Bereuter
- Subjects
chemistry.chemical_classification ,Ribonucleotide ,Chromatography ,Chemistry ,Nucleotides ,Organic Chemistry ,Kinetics ,Electrophoresis, Capillary ,Nucleosides ,General Medicine ,Biochemistry ,Analytical Chemistry ,Adduct ,Deoxyribonucleotide ,chemistry.chemical_compound ,Capillary electrophoresis ,Chromatography detector ,Nucleotide ,Cisplatin ,Nucleoside - Abstract
cis-Diamminedichloroplatinum(II) (cisplatin) is applied against different kinds of cancer although toxic side effects are known. Screening systems for alternative compounds with higher effectiveness but minimizing toxic side effects are required. We investigated the adduct formation of cisplatin with nucleoside monophosphates, di- and trinucleotides. Capillary electrophoretic separations were performed in a sodium phosphate buffer using an instrument equipped with a diode array detector. Adduct formation results in a significant shift of λmax to lower energy compared to free nucleotides. Therefore, UV spectra are an important tool for peak identification. We could separate and identify all four common nucleotides and their major platinum adducts in a single run demonstrating the suitability of CE for these kinds of investigations. Furthermore, kinetic studies of these reactions are performed.
- Published
- 1999
36. The importance of flexibility, mobility, academic freedom and cross-cultural competences for the successful organisation of bilateral research: Experiences of an ANR-DFG-funded project in art history
- Author
-
France Nerlich, Bénédicte Savoy, Interactions, transferts, ruptures artistiques et culturels - EA 6301 (InTRu), Université de Tours (UT), Technische Universität Berlin (TU), Andrea Zenker, Elisabeth Baier, Emmanuel Muller, Jean-Alain Héraud, Volker Tippmann, and Université de Tours
- Subjects
Histoire de l'art ,[SHS.ART]Humanities and Social Sciences/Art and art history ,Echanges culturels ,ComputingMilieux_MISCELLANEOUS - Abstract
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