9,952 research outputs found
Gene loss and lineage specific restriction-modification systems associated with niche differentiation in the Campylobacter jejuni Sequence Type 403 clonal complex
No full textCampylobacter jejuni is a highly diverse species of bacteria commonly associated with infectious intestinal disease of humans and zoonotic carriage in poultry, cattle, pigs, and other animals. The species contains a large number of distinct clonal complexes that vary from host generalist lineages commonly found in poultry, livestock, and human disease cases to host-adapted specialized lineages primarily associated with livestock or poultry. Here, we present novel data on the ST403 clonal complex of C. jejuni, a lineage that has not been reported in avian hosts. Our data show that the lineage exhibits a distinctive pattern of intralineage recombination that is accompanied by the presence of lineage-specific restriction-modification systems. Furthermore, we show that the ST403 complex has undergone gene decay at a number of loci. Our data provide a putative link between the lack of association with avian hosts of C. jejuni ST403 and both gene gain and gene loss through nonsense mutations in coding sequences of genes, resulting in pseudogene formation
Die Römische Republik /
No full textWer sich für antike Geschichte interessiert, greift zu dieser knappen und gut lesbaren Geschichte der Römischen Republik, geschrieben von einem der bekanntesten Althistoriker Deutschlands. Jochen Bleicken (1926-2005) führt den Leser von der Zeit der Etrusker bis zum Ende der Republik, das die Herrschaft Caesars besiegelte. Alle wichtigen Phasen der republikanischen Geschichte entfalten sich: die Ständekämpfe, Aufstieg Roms zur Weltherrschaft - und die zugehörigen ungeheuren kriegerischen Auseinandersetzungen -, Ursachen und Beginn der inneren Krise seit den Gracchen, die Restauration unter Sulla und schließlich: die Auflösung der Republik und die Begründung der Monarchie. Aloys Winterling Jochen Bleicken, 1926-2005, war Professor für Alte Geschichte an der Universität Göttingen und u.a. Mitherausgeber von "Oldenbourg Grundriss der Geschichte" und der HISTORISCHEN ZEITSCHRIFT.Wer sich für antike Geschichte interessiert, greift zu dieser knappen und gut lesbaren Geschichte der Römischen Republik, geschrieben von einem der bekanntesten Althistoriker Deutschlands. Jochen Bleicken (1926-2005) führt den Leser von der Zeit der Etrusker bis zum Ende der Republik, das die Herrschaft Caesars besiegelte. Alle wichtigen Phasen der republikanischen Geschichte entfalten sich: die Ständekämpfe, Aufstieg Roms zur Weltherrschaft - und die zugehörigen ungeheuren kriegerischen Auseinandersetzungen -, Ursachen und Beginn der inneren Krise seit den Gracchen, die Restauration unter Sulla und schließlich: die Auflösung der Republik und die Begründung der Monarchie. Aloys Winterling Jochen Bleicken, 1926-2005, war Professor für Alte Geschichte an der Universität Göttingen und u.a. Mitherausgeber von "Oldenbourg Grundriss der Geschichte" und der HISTORISCHEN ZEITSCHRIFT.Mode of access: Internet via World Wide Web.Description based on online resource; title from PDF title page (publisher's Web site, viewed 08. Jul 2019
ETFE-g-pentafluorostyrene: functionalization and proton conductivity
No full textIn this study we propose a relatively simple and versatile method for the preparation of a polyelectrolyte membrane based on poly(pentafluorostyrene) (PFS) owing proton exchange functionalities for proton conducting applications. The method includes two steps: grafting of the PFS from an irradiated ETFE film, followed by post-functionalization. The advantage of our approach lies in grafting a polymer with highly reactive functional groups suitable for efficient post-sulfonation/phosphonation. The grafting step is optimized both in terms of the system (bulk, non-/solvent and gas-phase grafting) and the conditions (radiation doses, time and temperature) used. The kinetics of the grafting shows a linear increase of grafting degree with both time and temperature suggesting a lower diffusion control and a reduced termination reaction rate for the optimized grafting process. Both phosphonation and sulfonation of the PFS grafted ETFE result in a corresponding high functionalization degree of 50% and 70% with IEC values of 1 and 1.5 mequiv g−1 and conductivities of 170 and 90 mS cm−1 at 120 °C, 90% RH for the sulfonated and phosphonated ETFE-g-PFS respectively. The high conductivity is attributed to the homogeneous distribution of the PFS within the ETFE matrix (EDX-SEM micrographs) and relatively high acidities of the sulfonic and the phosphonic acid
Selbstbestimmung zum Sterben – Fürsorge zum Leben: Widerspruch für die Rechtsordnung?
No full textZu Beginn der Pro-Contra-Debatten haben die Juristen das Wort. Sie diskutieren über die Frage: Soll der Staat Ärzten verbieten, Suizidbeihilfe zu leisten? Beginnen wird Herr Dr. Oliver Tolmein, Rechtsanwalt in Hamburg, der seit vielen Jahren zu medizinrechtlichen und biopolitischen Fragen auch journalistische Texte schreibt. Ihm folgt Prof. Dr. Jochen Taupitz, Inhaber des Lehrstuhls für Bürgerliches Recht, Zivilprozessrecht, internationales Privatrecht und Rechtsvergleichung an der Universität Mannheim und stellvertretender Vorsitzender des Deutschen Ethikrats
A new genus and two new species of Galumnidae (Acari, Oribatida) from Nepal
No full textErmilov, Sergey G., Martens, Jochen (2021): A new genus and two new species of Galumnidae (Acari, Oribatida) from Nepal. Zootaxa 5039 (2): 277-290, DOI: https://doi.org/10.11646/zootaxa.5039.2.
Figure 5 Leobodes becki n in Contribution to the knowledge of the oribatid mite genus Leobodes (Acari, Oribatida, Nippobodidae)
No full textFigure 5 Leobodes becki n. sp., adult, SEM micrographs: a – dorsoanterior view; b – lateral view; c – ventroanterior view; d – subcapitulum, ventrolateral view.Published as part of Ermilov, Sergey G. & Martens, Jochen, 2021, Contribution to the knowledge of the oribatid mite genus Leobodes (Acari, Oribatida, Nippobodidae), pp. 995-1014 in Acarologia 61 (4) on page 1002, DOI: 10.24349/z72f-jdlc, http://zenodo.org/record/715989
Figure 4 Leobodes becki n in Contribution to the knowledge of the oribatid mite genus Leobodes (Acari, Oribatida, Nippobodidae)
No full textFigure 4 Leobodes becki n. sp., adult, SEM micrographs: a, b – dorsal view; c – ventral view; d – ventrolateral view.Published as part of Ermilov, Sergey G. & Martens, Jochen, 2021, Contribution to the knowledge of the oribatid mite genus Leobodes (Acari, Oribatida, Nippobodidae), pp. 995-1014 in Acarologia 61 (4) on page 1001, DOI: 10.24349/z72f-jdlc, http://zenodo.org/record/715989
Transfer of Gottschelia grollei, G-patoniae and Scaphophyllum speciosum to Solenostoma based on chloroplast DNA rbcL sequences
No full textMaximum parsimony and Bayesian analyses of a chloroplast DNA rbcL dataset indicate a position of Gottschelia schizopleura in Scapaniaceae (Jungermanniales suborder Cephaloziineae). Gottschelia grollei, G. patoniae and Scaphophyllum speciosum are nested in Solenostoma (Solenostomataceae, Jungermanniales suborder Jungermanniideae) and are transferred to this genus. Accessions of G. schizopleura from Africa and Asia are separated by long branches
FIGURE 4 in A new genus and two new species of Galumnidae (Acari, Oribatida) from Nepal
No full textFIGURE 4. Anomalogalumna dungeri sp. nov., adult, SEM micrographs: A—anterior view; B—dorsoposterior view; C—lamellar seta and prodorsal sculpturing; D—ornamentation in median part of notogaster; E—part of anoadanal region.Published as part of Ermilov, Sergey G. & Martens, Jochen, 2021, A new genus and two new species of Galumnidae (Acari, Oribatida) from Nepal, pp. 277-290 in Zootaxa 5039 (2) on page 283, DOI: 10.11646/zootaxa.5039.2.8, http://zenodo.org/record/550919
FIGURE 5 in A new genus and two new species of Galumnidae (Acari, Oribatida) from Nepal
No full textFIGURE 5. Allogalumna (Allogalumna) beateae sp. nov., adult: A—dorsal view; B—ventral view (gnathosoma, legs and right pteromorph not shown); C—right lateral view (gnathosoma, legs and pteromorph not shown); D—posterior view. Scale bar 50 μm.Published as part of Ermilov, Sergey G. & Martens, Jochen, 2021, A new genus and two new species of Galumnidae (Acari, Oribatida) from Nepal, pp. 277-290 in Zootaxa 5039 (2) on page 284, DOI: 10.11646/zootaxa.5039.2.8, http://zenodo.org/record/550919
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