TY - JOUR A1 - Krasnova, Hanna A1 - Veltri, Natasha F. A1 - Spengler, Klaus A1 - Günther, Oliver T1 - "Deal of the Day" Platforms what drives Consumer loyalty? JF - Business & information systems engineering : the international journal of Wirtschaftsinformatik N2 - "Deal of the Day" (DoD) platforms have quickly become popular by offering savings on local services, products and vacations. For merchants, these platforms represent a new marketing channel to advertise their products and services and attract new customers. DoD platform providers, however, struggle to maintaining a stable market share and profitability, because entry and switching costs are low. To sustain a competitive market position, DoD providers are looking for ways to build a loyal customer base. However, research examining the determinants of user loyalty in this novel context is scarce. To fill this gap, this study employs Grounded Theory methodology to develop a conceptual model of customer loyalty to a DoD provider. In the next step, qualitative insights are enriched and validated using quantitative data from a survey of 202 DoD users. The authors find that customer loyalty is in large part driven by monetary incentives, but can be eroded if impressions from merchant encounters are below expectations. In addition, enhancing the share of deals relevant for consumers, i.e. signal-to-noise ratio, and mitigating perceived risks of a transaction emerge as challenges. Beyond theoretical value, the results offer practical insights into how customer loyalty to a DoD provider can be promoted. KW - Deal of the Day KW - Loyalty KW - Grounded theory KW - Structural equation modeling Y1 - 2013 U6 - https://doi.org/10.1007/s12599-013-0268-2 SN - 1867-0202 VL - 5 IS - 3 SP - 165 EP - 177 PB - Springer CY - Heidelberg ER - TY - JOUR A1 - Müller, Gesine T1 - "La litterature jaune" : Gustave d'Alaux und die frühen Zeugnisse haitianischer Literaturgeschichtsschreibung Y1 - 2013 SN - 978-3-7705-5407-2 ER - TY - JOUR A1 - Ette, Ottmar T1 - "Mobile mappings" y las literaturas sin residencia fija : Perspectivas de una poética del movimiento Y1 - 2013 SN - 978-3-938944-69-1 ER - TY - JOUR A1 - Dolya, Natalya A1 - Rojas, Oscar A1 - Kosmella, Sabine A1 - Tiersch, Brigitte A1 - Koetz, Joachim A1 - Kudaibergenov, Sarkyt T1 - "One-Pot" in situ frmation of Gold Nanoparticles within Poly(acrylamide) Hydrogels JF - Macromolecular chemistry and physics N2 - This paper focuses on two different strategies to incorporate gold nanoparticles (AuNPs) into the matrix of polyacrylamide (PAAm) hydrogels. Poly(ethyleneimine) (PEI) is used as both reducing and stabilizing agent for the formation of AuNPs. In addition, the influence of an ionic liquid (IL) (i.e., 1-ethyl-3-methylimidazolium ethylsulfate) on the stability of the nanoparticles and their immobilization in the hydrogel is investigated The results show that AuNPs surrounded by a shell containing PEI and IL, synthesized according to the one-pot approach, are much better immobilized within the PAAm hydrogel. Hereby, the IL is responsible for structural changes in the hydrogel as well as the improved stabilization and embedding of the AuNPs into the polymer gel matrix. KW - gold nanoparticles KW - immobilization KW - ionic liquids KW - poly(acrylamide) hydrogels Y1 - 2013 U6 - https://doi.org/10.1002/macp.201200727 SN - 1022-1352 VL - 214 IS - 10 SP - 1114 EP - 1121 PB - Wiley-VCH CY - Weinheim ER - TY - JOUR A1 - Schwarz, Anja T1 - "Parallel Societies" of the Past? - Articulations of citizenship's commemorative dimension in Berlin's cityscape JF - Space and Culture N2 - Historical narratives play an important role in constructing contemporary notions of citizenship. They are sites on which ideas of the nation are not only reaffirmed but also contested and reframed. In contemporary Germany, dominant narratives of the country's modern history habitually focus on the legacy of the Third Reich and tend to marginalize the country's rich and highly complex histories of immigration. The article addresses this commemorative void in relation to Berlin's urban landscape. It explores how the city's multilayered architecture provides locations for the articulation of marginal memoriesand hence sites of urban citizenshipthat are often denied to immigrant communities on a national scale. Through a detailed examination of a small celebration in 1965 that marked the anniversary of the founding of the modern Turkish republic, the article engages with the layers of history that coalesce around such sites in Berlin. KW - Berlin KW - commemorative acts of citizenship KW - migration KW - multidirectional memory Y1 - 2013 U6 - https://doi.org/10.1177/1206331213487051 SN - 1206-3312 VL - 16 IS - 3 SP - 261 EP - 273 PB - Sage Publ. CY - Thousand Oaks ER - TY - JOUR A1 - Peitsch, Helmut T1 - "Rec [...] bleibt [...] lieber bey dem stehen, wo Hr. Forster in seinem eigentlichen Fache ist" : Forsters Reisebeschreibungen und Übersetzungen in der Allgemeinen deutschen Bibliothek Y1 - 2013 SN - 978-3-89971-909-3 ER - TY - JOUR A1 - Fröhlich, Paul A1 - Kranz, Alexander T1 - "Ämterchaos" in der Wehrmachtbürokratie? Das Allgemeine Heeresamt, das Wehrwirtschafts- und Rüstungsamt und die deutsche Rüstungspolitik 1938 - 1940 Y1 - 2013 SN - 978-3-506-77657-0 ER - TY - JOUR A1 - Kleinpeter, Erich A1 - Koch, Andreas T1 - (Anti)aromaticity of dehydroannulenes of various ring size proved by the ring current effect in H-1 NMR spectra JF - Tetrahedron N2 - The spatial magnetic properties (Through-Space NMR Shieldings-TSNMRS) of already synthesized dehydro[n]annulenes of various ring size (from C-12 to C-20) have been computed, visualized as Isochemical Shielding Surfaces (ICSS) of various size and direction, and were examined subject to present (anti)aromaticity. For this purpose the thus quantified ring current effect of the macro cycles on proximate protons in proton NMR spectra was employed. KW - Dehydro[n]annulenes KW - (Anti)aromaticity KW - TSNMRS KW - H-1 NMR spectroscopy KW - Anisotropic effect KW - Theoretical calculations KW - ICSS Y1 - 2013 U6 - https://doi.org/10.1016/j.tet.2012.12.019 SN - 0040-4020 VL - 69 IS - 5 SP - 1481 EP - 1488 PB - Elsevier CY - Oxford ER - TY - JOUR A1 - Zimmermann, Andreas T1 - (Internationale) Strafverfolgung von Menschenrechtsverbrechen versus Friedenswahrung Y1 - 2013 SN - 978- 3-428-13933-0 ER - TY - JOUR A1 - Brüning, Christoph T1 - (Verfassungs-) Rechtliche Maßstäbe an Funktional- und Territorialreformen JF - KWI-Schriften N2 - I. Problemeinführung II. Reformdimensionen III. Anwendungsfälle und Gründe IV. Der (verfassungs-)rechtliche Rahmen V. Ausgestaltung und Konsequenzen VI. Fazit Y1 - 2013 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:kobv:517-opus-65382 SN - 1867-951X SN - 1867-9528 IS - 7 SP - 27 EP - 46 PB - Universitätsverlag Potsdam CY - Potsdam ER - TY - JOUR A1 - Sentance, Sue A1 - Hodges, Steve T1 - .NET Gadgeteer Workshop JF - Commentarii informaticae didacticae : (CID) Y1 - 2013 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:kobv:517-opus-64654 SN - 1868-0844 SN - 2191-1940 IS - 6 SP - 159 PB - Universitätsverlag Potsdam CY - Potsdam ER - TY - JOUR A1 - Shainyan, Bagrat A. A1 - Kirpichenko, Svetlana V. A1 - Kleinpeter, Erich A1 - Shlykov, Sergey A. A1 - Osadchiy, Dmitriy Yu A1 - Chipanina, Nina N. A1 - Oznobikhina, Larisa P. T1 - 1,3-Dimethy1-3-silapiperidine - synthesis, molecular structure, and conformational analysis by gas-phase electron diffraction, low temperature NMR, IR and Raman Spectroscopy, and quantum chemical calculations JF - The journal of organic chemistry N2 - The first Si-H-containing azasilaheterocycle, 1,3-dimethyl-3-silapiperidine 1, was synthesized, and its molecular structure and conformational properties were studied by gas-phase electron diffraction (GED), low temperature NMR, IR and Raman spectroscopy and quantum chemical calculations. The compound exists as a mixture of two conformers possessing the chair conformation with the equatorial NMe group and differing by axial or equatorial position of the SiMe group. In the gas phase, the SiMeax conformer predominates (GED: ax/eq = 65(7):35(7)%,Delta G = 0.36(18) kcal/mol; IR: ax/eq = 62(5):38(5)%,Delta G = 0.16(7) kcal/mol). In solution, at 143 k the SiMeeq conformer predominates' in the frozen equilibrium (NMR: ax/eq = 31.5(1.5):68.5(1.5)%, Delta G = -0.22(2) kcal/mol). Thermodynamic parameters of the ring inversion are determined (Delta G(double dagger) = 8.9-9.0 kcal/mol, Delta H-double dagger = 9.6 kcal/mol, Delta S-double dagger = 2.1 eu). High-level quantum chemical calculations :(MP2, G2, CCSD(T)) nicely reproduce the experimental geometry and the predominance of the axial conformer in the gas phase. Y1 - 2013 U6 - https://doi.org/10.1021/jo400289g SN - 0022-3263 VL - 78 IS - 8 SP - 3939 EP - 3947 PB - American Chemical Society CY - Washington ER - TY - JOUR A1 - Rasumny, Wiebke T1 - 1. Workshop des wissenschaftlichen Nachwuchses in der Genisa-Forschungsstelle Veitshöchheim JF - PaRDeS : Zeitschrift der Vereinigung für Jüdische Studien e.V. N2 - Die Idee für den Workshop war entstanden im Rahmen der Nachwuchstagung Judaistik/Jüdische Studien der Vereinigung für Jüdische Studien e. V., die im Februar 2012 in Bamberg stattgefunden hatte. Dort äußerte sich ein großer Bedarf nach größerer überregionaler Vernetzung. Als sehr wünschenswert wurde festgehalten, in Ergänzung zur Nachwuchstagung auch regelmäßige Treffen in kleineren Arbeitsgruppen zu etablieren. Der Workshop in Veitshöchheim war die erste Veranstaltung, die diese Idee zeitnah, acht Monate nach der Nachwuchstagung, umsetzte. Der Workshop fand in Kooperation zwischen der Vereinigung für Jüdische Studien mit dem Lehrstuhl für fränkische Landesgeschichte an der Universität Würzburg statt. Y1 - 2013 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:kobv:517-opus-67161 SN - 1614-6492 SN - 1862-7684 IS - 19 SP - 223 EP - 226 PB - Universitätsverlag Potsdam CY - Potsdam ER - TY - JOUR A1 - Calo, Camilla A1 - Henne, Paul D. A1 - Eugster, Patricia A1 - van Leeuwen, Jacqueline A1 - Gilli, Adrian A1 - Hamann, Yvonne A1 - La Mantia, Tommaso A1 - Pasta, Salvatore A1 - Vescovi, Elisa A1 - Tinner, Willy T1 - 1200 years of decadal-scale variability of mediterranean vegetation and climate at Pantelleria Island, Italy JF - The Holocene : an interdisciplinary journal focusing on recent environmental change N2 - A new sedimentary sequence from Lago di Venere on Pantelleria Island, located in the Strait of Sicily between Tunisia and Sicily was recovered. The lake is located in the coastal infra-Mediterranean vegetation belt at 2 m a.s.l. Pollen, charcoal and sedimentological analyses are used to explore linkages among vegetation, fire and climate at a decadal scale over the past 1200 years. A dry period from ad 800 to 1000 that corresponds to the Medieval Warm Period' (WMP) is inferred from sedimentological analysis. The high content of carbonate recorded in this period suggests a dry phase, when the ratio of evaporation/precipitation was high. During this period the island was dominated by thermophilous and drought-tolerant taxa, such as Quercus ilex, Olea, Pistacia and Juniperus. A marked shift in the sediment properties is recorded at ad 1000, when carbonate content became very low suggesting wetter conditions until ad 1850-1900. Broadly, this period coincides with the Little Ice Age' (LIA), which was characterized by wetter and colder conditions in Europe. During this time rather mesic conifers (i.e. Pinus pinaster), shrubs and herbs (e.g. Erica arborea and Selaginella denticulata) expanded, whereas more drought-adapted species (e.g. Q. ilex) declined. Charcoal data suggest enhanced fire activity during the LIA probably as a consequence of anthropogenic burning and/or more flammable fuel (e.g. resinous Pinus biomass). The last century was characterized by a shift to high carbonate content, indicating a change towards drier conditions, and re-expansion of Q. ilex and Olea. The post-LIA warming is in agreement with historical documents and meteorological time series. Vegetation dynamics were co-determined by agricultural activities on the island. Anthropogenic indicators (e.g. Cerealia-type, Sporormiella) reveal the importance of crops and grazing on the island. Our pollen data suggest that extensive logging caused the local extinction of deciduous Quercus pubescens around ad1750. KW - central Mediterranean KW - fire history KW - "Little Ice Age' (LIA) KW - "Medieval Warm Period' (MWP) KW - Pinus pinaster KW - Quercus ilex KW - Quercus pubescens KW - vegetation history Y1 - 2013 U6 - https://doi.org/10.1177/0959683613493935 SN - 0959-6836 SN - 1477-0911 VL - 23 IS - 10 SP - 1477 EP - 1486 PB - Sage Publ. CY - London ER - TY - JOUR A1 - Schmidt, Bernd A1 - Riemer, Martin A1 - Karras, Manfred T1 - 2,2 '-Biphenols via protecting group-free thermal or microwave-accelerated suzuki-miyaura coupling in water JF - The journal of organic chemistry N2 - User-friendly protocols for the protecting group-free synthesis of 2,2'-biphenols via Suzuki-Miyaura coupling of o-halophenols and o-boronophenol are presented. The reactions proceed in water in the presence of simple additives such as K2CO3, KOH, KF, or TBAF and with commercially available Pd/C as precatalyst. Expensive or laboriously synthesized ligands or other additives are not required. In the case of bromophenols, efficient rate acceleration and short reaction times were accomplished by microwave irradiation. Y1 - 2013 U6 - https://doi.org/10.1021/jo401398n SN - 0022-3263 VL - 78 IS - 17 SP - 8680 EP - 8688 PB - American Chemical Society CY - Washington ER - TY - JOUR A1 - Dzambaski, Zdravko A1 - Markovic, Rade A1 - Kleinpeter, Erich A1 - Baranac-Stojanovic, Marija T1 - 2-Alkylidene-4-oxothiazolidine S-oxides - synthesis and stereochemistry JF - Tetrahedron N2 - A series of 5-unsubstituted and 5-substituted 2-alkylidene-4-oxothiazolidine-S-oxides were synthesized by the sulfur-oxidation with m-CPBA. The stereochemistry of 5-substituted sulfoxides was determined by means of NMR spectroscopy and DFT theoretical calculations. It was found that the thermodynamically less stable anti-isomer was initially formed in the course of the oxidation, but it underwent epimerization to the mixture enriched in the more stable syn-isomer, during the work-up process. The higher stability of syn-isomers is ascribed to the stronger hyperconjugative sigma(C-H)->sigma*(S-O) interaction versus the weaker sigma(C-C)->sigma*(S-O) delocalization in their anti-counterparts and to the existence of intramolecular 1,5-CH center dot center dot center dot C hydrogen bonds. KW - 2-Alkylidene-4-oxothiazolidine KW - Sulfoxide KW - Diastereoselectivity KW - Density functional calculations KW - CH center dot center dot center dot O hydrogen bonds Y1 - 2013 U6 - https://doi.org/10.1016/j.tet.2013.05.087 SN - 0040-4020 VL - 69 IS - 31 SP - 6436 EP - 6447 PB - Elsevier CY - Oxford ER - TY - JOUR A1 - Mutai, Peggoty A1 - Heydenreich, Matthias A1 - Thoithi, Grace A1 - Mugumbate, Grace A1 - Chibale, Kelly A1 - Yenesew, Abiy T1 - 3-Hydroxyisoflavanones from the stem bark of dalbergia melanoxylon - isolation, antimycobacterial evaluation and molecular docking studies JF - Phytochemistry letters N2 - Two new 3-hydroxyisoflavanones, (S)-3,4',5-trihydroxy-2',7-dimethoxy-3'-prenylisoflavanone (trivial name kenusanone F 7-methyl ether) and (S)-3,5-dihydroxy-2',7-dimethoxy-2 '',2 ''-dimethylpyrano[5 '',6 '':3',4']isoflavanone (trivial name sophoronol-7-methyl ether) along with two known compounds (dalbergin and formononetin) were isolated from the stem bark of Dalbergia melanoxylon. The structures were elucidated using spectroscopic techniques. Kenusanone F 7-methyl ether showed activity against Mycobacterium tuberculosis, whereas both of the new compounds were inactive against the malaria parasite Plasmodium falciparum at 10 mu g/ml. Docking studies showed that the new compounds kenusanone F 7-methyl ether and sophoronol-7-methyl ether have high affinity for the M. tuberculosis drug target INHA. KW - Dalbergia melanoxylon KW - 3-Hydroxyisoflavanone KW - Kenusanone F 7-methyl ether KW - Sophoronol-7-methyl ether KW - Mycobacterium tuberculosis KW - Docking Y1 - 2013 U6 - https://doi.org/10.1016/j.phytol.2013.08.018 SN - 1874-3900 SN - 1876-7486 VL - 6 IS - 4 SP - 671 EP - 675 PB - Elsevier CY - Amsterdam ER - TY - JOUR A1 - Dölling, Irene T1 - 30 Years of feminist studies how do we deal with the feminist Heritage? JF - Feministische Studien : Zeitschrift für interdisziplinäre Frauen- und Geschlechterforschung Y1 - 2013 SN - 0723-5186 VL - 31 IS - 1 SP - 29 EP - 34 PB - Lucius & Lucius CY - Stuttgart ER - TY - JOUR A1 - Kaiser, Björn Onno A1 - Cacace, Mauro A1 - Scheck-Wenderoth, Magdalena T1 - 3D coupled fluid and heat transport simulations of the Northeast German Basin and their sensitivity to the spatial discretization - different sensitivities for different mechanisms of heat transport JF - Environmental earth sciences N2 - Based on a numerical model of the Northeast German Basin (NEGB), we investigate the sensitivity of the calculated thermal field as resulting from heat conduction, forced and free convection in response to consecutive horizontal and vertical mesh refinements. Our results suggest that computational findings are more sensitive to consecutive horizontal mesh refinements than to changes in the vertical resolution. In addition, the degree of mesh sensitivity depends strongly on the type of the process being investigated, whether heat conduction, forced convection or free thermal convection represents the active heat driver. In this regard, heat conduction exhibits to be relative robust to imposed changes in the spatial discretization. A systematic mesh sensitivity is observed in areas where forced convection promotes an effective role in shorten the background conductive thermal field. In contrast, free thermal convection is to be regarded as the most sensitive heat transport process as demonstrated by non-systematic changes in the temperature field with respect to imposed changes in the model resolution. KW - Mesh convergence KW - Conduction KW - Advection KW - Convection KW - Thermal field KW - Northeast German Basin Y1 - 2013 U6 - https://doi.org/10.1007/s12665-013-2249-7 SN - 1866-6280 SN - 1866-6299 VL - 70 IS - 8 SP - 3643 EP - 3659 PB - Springer CY - New York ER - TY - JOUR A1 - Ruzanski, Christian A1 - Smirnova, Julia A1 - Rejzek, Martin A1 - Cockburn, Darrell A1 - Pedersen, Henriette L. A1 - Pike, Marilyn A1 - Willats, William G. T. A1 - Svensson, Birte A1 - Steup, Martin A1 - Ebenhöh, Oliver A1 - Smith, Alison M. A1 - Field, Robert A. T1 - A bacterial glucanotransferase can replace the complex maltose metabolism required for starch to sucrose conversion in leaves at night JF - The journal of biological chemistry N2 - Controlled conversion of leaf starch to sucrose at night is essential for the normal growth of Arabidopsis. The conversion involves the cytosolic metabolism of maltose to hexose phosphates via an unusual, multidomain protein with 4-glucanotransferase activity, DPE2, believed to transfer glucosyl moieties to a complex heteroglycan prior to their conversion to hexose phosphate via a cytosolic phosphorylase. The significance of this complex pathway is unclear; conversion of maltose to hexose phosphate in bacteria proceeds via a more typical 4-glucanotransferase that does not require a heteroglycan acceptor. It has recently been suggested that DPE2 generates a heterogeneous series of terminal glucan chains on the heteroglycan that acts as a glucosyl buffer to ensure a constant rate of sucrose synthesis in the leaf at night. Alternatively, DPE2 and/or the heteroglycan may have specific properties important for their function in the plant. To distinguish between these ideas, we compared the properties of DPE2 with those of the Escherichia coli glucanotransferase MalQ. We found that MalQ cannot use the plant heteroglycan as an acceptor for glucosyl transfer. However, experimental and modeling approaches suggested that it can potentially generate a glucosyl buffer between maltose and hexose phosphate because, unlike DPE2, it can generate polydisperse malto-oligosaccharides from maltose. Consistent with this suggestion, MalQ is capable of restoring an essentially wild-type phenotype when expressed in mutant Arabidopsis plants lacking DPE2. In light of these findings, we discuss the possible evolutionary origins of the complex DPE2-heteroglycan pathway. KW - Carbohydrate Metabolism KW - Computer Modeling KW - Metabolic Regulation KW - Oligosaccharide KW - Plant Biochemistry KW - Glucanotransferase KW - Leaf Cell KW - Maltose Metabolism KW - Starch Degradation Y1 - 2013 U6 - https://doi.org/10.1074/jbc.M113.497867 SN - 0021-9258 SN - 1083-351X VL - 288 IS - 40 SP - 28581 EP - 28598 PB - American Society for Biochemistry and Molecular Biology CY - Bethesda ER -