@phdthesis{Lohmann2012,
  author    = {Lohmann, Michael},
  title     = {Medienorientierung und innerparteiliche Machtk{\"a}mpfe : Gr{\"u}nde und Verl{\"a}ufe innerparteilicher Machtk{\"a}mpfe am Beispiel der unerwarteten Kampfkandidatur um den Parteivorsitz auf dem Mannheimer SPD-Parteitag 1995},
  url       = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus-71245},
  school      = {Universit{\"a}t Potsdam},
  year      = {2012},
  abstract  = {{\"U}blicherweise vermeiden deutsche Parteien Kampfkandidaturen um den Vorsitz. Dennoch kam es auf dem Mannheimer SPD-Parteitag 1995 zu einer unerwarteten offenen Konkurrenz um das Spitzenamt. Das unbeabsichtigte Scheitern der Inszenierung der „Geschlossenheit" der Partei f{\"u}hrte zum Ausbruch der bis dahin unterdr{\"u}ckten K{\"a}mpfe um den Parteivorsitz. Der Mannheimer Parteitag steht exemplarisch f{\"u}r den Zusammenhang zwischen Inszenierung, Disziplin und den informellen Regeln innerparteilicher Machtkonstruktion. Am Beispiel dieses Parteitages zeigt die vorliegende Arbeit, wie umstrittenen Parteivorsitzenden sich gegen Widerst{\"a}nde im Amt behaupten k{\"o}nnen bzw. woran diese Strategie scheitern kann. Aus figurationstheoretischer Perspektive wird die Inszenierung als Notwendigkeit medienvermittelter Parteienkonkurrenz um W{\"a}hlerstimmen gefasst. Inszenierung erfordert Selbstdisziplin und das koordinierte Handeln der Parteimitglieder. Innerparteilich wird so wechselseitige Abh{\"a}ngigkeit erzeugt. Diese wird gesteigert durch die Medien-Konzentration auf wenige Spitzenpolitiker. Die Mehrheit der Mandatstr{\"a}ger und Funktion{\"a}re ist angewiesen auf das medienwirksame Auftreten der F{\"u}hrung. F{\"u}r den Medienerfolg braucht die F{\"u}hrung ihrerseits die Unterst{\"u}tzung der Mitglieder. Diese wechselseitige Abh{\"a}ngigkeit erzeugt sowohl typische Relevanzen als auch M{\"o}glichkeiten, die jeweils andere Interessengruppe unter Zugzwang zu setzen. Imageprobleme des Vorsitzenden sind als verletzte Erwartungen Anlass f{\"u}r innerparteiliche Machtk{\"a}mpfe, in denen die Parteif{\"u}hrung insbesondere die Inszenierung der „Geschlossenheit" nutzen kann, um offene Personaldiskussionen zu verhindern. Da Handlungsoptionen und -grenzen durch das Handeln der Akteure immer wieder neu geschaffen werden, besteht stets das Risiko des Scheiterns innerparteilicher Disziplinierung. Mit dem Nachvollzug von Disziplinierung und den Gr{\"u}nden ihrer Kontingenz versteht sich die vorliegende Arbeit als Beitrag zu einer Theorie informeller Machtregeln in Organisationen mit schwach ausgepr{\"a}gten Herrschaftsstrukturen. Im ersten Teil der Arbeit wird der Zusammenhang zwischen Inszenierung und Macht durch die Konzepte Theatralit{\"a}t und Figuration entwickelt. Im zweiten Teil werden typische Konstellationen der gegenw{\"a}rtigen parlamentarischen Demokratie auf typische beziehungsvermittelte Situationsdeutungen, Handlungsm{\"o}glichkeiten und -grenzen untersucht. Im dritten Teil wird der kontingente Prozess des innerparteilichen Machtkampfes am Beispiel des Mannheimer Parteitages 1995 nachvollzogen.},
  language  = {de}
}
@misc{DettmannHuittinenJahnetal.2023,
  author    = {Dettmann, Sophie and Huittinen, Nina Maria and Jahn, Nicolas and Kretzschmar, Jerome and Kumke, Michael and Kutyma, Tamara and Lohmann, Janik and Reich, Tobias and Schmeide, Katja and Azzam, Salim Shams Aldin and Spittler, Leon and Stietz, Janina},
  title     = {Influence of gluconate on the retention of Eu(III), Am(III), Th(IV), Pu(IV), and U(VI) by C-S-H (C/S = 0.8)},
  series = {Zweitver{\"o}ffentlichungen der Universit{\"a}t Potsdam : Mathematisch-Naturwissenschaftliche Reihe},
  journal   = {Zweitver{\"o}ffentlichungen der Universit{\"a}t Potsdam : Mathematisch-Naturwissenschaftliche Reihe},
  number    = {1318},
  issn      = {1866-8372},
  doi       = {10.25932/publishup-58845},
  url       = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus4-588455},
  pages     = {15},
  year      = {2023},
  abstract  = {The retention of actinides in different oxidation states (An(X), X = III, IV, VI) by a calcium-silicate-hydrate (C-S-H) phase with a Ca/Si (C/S) ratio of 0.8 was investigated in the presence of gluconate (GLU). The actinides considered were Am(III), Th(IV), Pu(IV), and U(VI). Eu(III) was investigated as chemical analogue for Am(III) and Cm(III). In addition to the ternary systems An(X)/GLU/C-S-H, also binary systems An(X)/C-S-H, GLU/C-S-H, and An(X)/GLU were studied. Complementary analytical techniques were applied to address the different specific aspects of the binary and ternary systems. Time-resolved laser-induced luminescence spectroscopy (TRLFS) was applied in combination with parallel factor analysis (PARAFAC) to identify retained species and to monitor species-selective sorption kinetics. ¹³C and ²⁹Si magic-angle-spinning (MAS) nuclear magnetic resonance (NMR) spectroscopy and X-ray photoelectron spectroscopy (XPS) were applied to determine the bulk structure and the composition of the C-S-H surface, respectively, in the absence and presence of GLU. The interaction of Th(IV) with GLU in different electrolytes was studied by capillary electrophoresis-inductively coupled plasma mass spectrometry (CE-ICP-MS). The influence of GLU on An(X) retention was investigated for a large concentration range up to 10⁻² M. The results showed that GLU had little to no effect on the overall An(X) retention by C-S-H with C/S of 0.8, regardless of the oxidation state of the actinides. For Eu(III), the TRLFS investigations additionally implied the formation of a Eu(III)-bearing precipitate with dissolved constituents of the C-S-H phase, which becomes structurally altered by the presence of GLU. For U(VI) sorption on the C-S-H phase, only a small influence of GLU could be established in the luminescence spectroscopic investigations, and no precipitation of U(VI)-containing secondary phases could be identified.},
  language  = {en}
}
@article{DettmannHuittinenNicolasetal.2023,
  author    = {Dettmann, Sophie and Huittinen, Nina Maria and Nicolas, Jahn and Kretzschmar, Jerome and Kumke, Michael and Kutyma, Tamara and Lohmann, Janik and Reich, Tobias and Schmeide, Katja and Azzam, Salim Shams Aldin and Spittler, Leon and Stietz, Janina},
  title     = {Influence of gluconate on the retention of Eu(III), Am(III), Th(IV), Pu(IV), and U(VI) by C-S-H (C/S = 0.8)},
  series = {Frontiers in Nuclear Engineering},
  volume    = {2},
  journal   = {Frontiers in Nuclear Engineering},
  publisher = {Frontiers Media},
  address   = {Lausanne},
  issn      = {2813-3412},
  doi       = {10.3389/fnuen.2023.1124856},
  pages     = {15},
  year      = {2023},
  abstract  = {The retention of actinides in different oxidation states (An(X), X = III, IV, VI) by a calcium-silicate-hydrate (C-S-H) phase with a Ca/Si (C/S) ratio of 0.8 was investigated in the presence of gluconate (GLU). The actinides considered were Am(III), Th(IV), Pu(IV), and U(VI). Eu(III) was investigated as chemical analogue for Am(III) and Cm(III). In addition to the ternary systems An(X)/GLU/C-S-H, also binary systems An(X)/C-S-H, GLU/C-S-H, and An(X)/GLU were studied. Complementary analytical techniques were applied to address the different specific aspects of the binary and ternary systems. Time-resolved laser-induced luminescence spectroscopy (TRLFS) was applied in combination with parallel factor analysis (PARAFAC) to identify retained species and to monitor species-selective sorption kinetics. ¹³C and ²⁹Si magic-angle-spinning (MAS) nuclear magnetic resonance (NMR) spectroscopy and X-ray photoelectron spectroscopy (XPS) were applied to determine the bulk structure and the composition of the C-S-H surface, respectively, in the absence and presence of GLU. The interaction of Th(IV) with GLU in different electrolytes was studied by capillary electrophoresis-inductively coupled plasma mass spectrometry (CE-ICP-MS). The influence of GLU on An(X) retention was investigated for a large concentration range up to 10⁻² M. The results showed that GLU had little to no effect on the overall An(X) retention by C-S-H with C/S of 0.8, regardless of the oxidation state of the actinides. For Eu(III), the TRLFS investigations additionally implied the formation of a Eu(III)-bearing precipitate with dissolved constituents of the C-S-H phase, which becomes structurally altered by the presence of GLU. For U(VI) sorption on the C-S-H phase, only a small influence of GLU could be established in the luminescence spectroscopic investigations, and no precipitation of U(VI)-containing secondary phases could be identified.},
  language  = {en}
}
@article{FalkKirkLohmannetal.2017,
  author    = {Falk, Thomas and Kirk, Michael and Lohmann, Dirk and Kruger, Bertus and H{\"u}ttich, Christian and Kamukuenjandje, Richard},
  title     = {The profits of excludability and transferability in redistributive land reform in central Namibia},
  series = {Development Southern Africa},
  volume    = {34},
  journal   = {Development Southern Africa},
  publisher = {Routledge, Taylor \& Francis Group},
  address   = {Abingdon},
  issn      = {0376-835X},
  doi       = {10.1080/0376835X.2016.1269633},
  pages     = {314 -- 329},
  year      = {2017},
  abstract  = {Policies which redistribute property rights to land can improve the well-being of rural households and can have overall growth effects. In many cases, however, land reforms are driven mainly by politically justified objectives. Under such circumstances, little emphasis is placed on whether and, if so, how property rights can increase productivity. Following 18 years of land reform implementation in Namibia, we evaluated 65 beneficiaries in Namibia. We assess to which degree land rights affects their farm income. The study focuses on Namibia's two main commercial land reform instruments, namely the Farm Unit Resettlement Scheme and the Affirmative Action Loan Scheme. We find evidence that the majority of land reform projects are not profitable. Further, our study confirms the importance of the right to restrict land access compared with the right to transfer. The long-term leasehold contract seemingly provides sufficient incentives to make productive use of the land.},
  language  = {en}
}
@article{LohmannStaceyBreuningeretal.2010,
  author    = {Lohmann, Daniel and Stacey, Nicola and Breuninger, Holger and Jikumaru, Yusuke and M{\"u}ller, D{\"o}rte and Sicard, Adrien and Leyser, Ottoline and Yamaguchi, Shinjiro and Lenhard, Michael},
  title     = {SLOW MOTION is required for within-plant auxin homeostasis and normal timing of lateral organ initiation at the shoot meristem in Arabidopsis},
  issn      = {1040-4651},
  year      = {2010},
  language  = {en}
}