2,063 research outputs found
Das Kreislaufwirtschaftsgesetz und seine Auswirkungen : Diskussionspapier
No full textvon Gerhard Kmoch ; Wilhelm-Josef Dewey ; Jochen StemplewskiElectronic Ed.: Bonn : FES-Library, 1998. - Online version contains links to image file
Jochen Wissinger / Stephan Gerhard Huber (Hrsg.): Schulleitung - Forschung und Qualifizierung. Opladen: Leske und Budrich 2002 (238 S.) [Rezension]
No full textRezension von: Jochen Wissinger / Stephan Gerhard Huber (Hrsg.): Schulleitung - Forschung und Qualifizierung. Opladen: Leske und Budrich 2002 (238 S.; ISBN 3-8100-3427-4; 24,90 EUR)
Aufklärungen. Frankreich und Deutschland im 18. Jahrhundert. Vol. 1, édité par Gerhard Sauder und Jochen Schlobach, (Coll. «Annales Universitatis Saraviensis ».) 1986
No full textBurger Pierre-François. Aufklärungen. Frankreich und Deutschland im 18. Jahrhundert. Vol. 1, édité par Gerhard Sauder und Jochen Schlobach, (Coll. «Annales Universitatis Saraviensis ».) 1986. In: Dix-huitième Siècle, n°19, 1987. La franc-maçonnerie. p. 443
Audit committees - ein Instrument zur Unternehmensüberwachung?
No full textAudit committees - ein Instrument zur Unternehmensüberwachung? / Adolf Gerhard Coenenberg ; Alexander Reinhart ; Jochen Schmitz. - In: Der Betrieb. 50. 1997. S. 989-99
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
Rapid eclogitisation of the Dabie–Sulu UHP terrane: Constraints from Lu–Hf garnet geochronology
No full textAbstractThe Qinling–Dabie–Sulu orogenic belt in eastern China is one of the largest ultrahigh-pressure (UHP) terranes worldwide. Mineral Sm–Nd- and zircon U–Pb dating has been widely used to reveal the metamorphic history of this collisional orogen. However, the exact timing of the UHP metamorphic event(s) remains controversial and ages ranging from 245 Ma to 220 Ma have been suggested. We present high precision garnet–cpx Lu–Hf ages for six eclogites from the Dabie and Sulu areas. All ages fall in a narrow range between 219.6 and 224.4 Ma. Five samples define a mean age of 223.0±0.9 Ma and one sample yields a slightly younger age of 219.6±1.4 Ma. This very tight age range is particularly remarkable considering the large regional distribution of sample localities (on the order of 100 km at the time of UHP metamorphism) and the wide variety of garnet and eclogite chemical compositions represented. Two samples yield Sm–Nd ages that are indistinguishable from their Lu–Hf ages, albeit with larger uncertainties.The identical ages of eclogites from both the Dabie and the Sulu region emphasize their close genetic relationship and similar metamorphic histories. The Lu–Hf results appear to date a punctuated event of garnet growth. Alternatively, the Lu–Hf garnet ages may represent the onset of rapid, contemporaneous uplift and subsequent cooling. However, trace element zoning of Lu and Hf is still preserved in garnet porphyroblasts, even in those with a homogeneous major element distribution. Thus, complete re-equilibration of the Lu–Hf system during peak-temperature conditions probably did not occur. The garnet forming event can be placed toward the final stage of the UHP metamorphism, in agreement with some published U–Pb zircon ages. A possible trigger for this short-lived and widespread mineral growth episode may have been a fluid that became available at that stage of the metamorphic history. Although HREE-depleted patterns of older zircon grains may indicate the presence of an older generation of garnet, complete eclogitisation may have been inhibited during the major part of the prograde P–T path due to dry conditions during most of the UHP metamorphism. The uniform Lu–Hf (and Sm–Nd) ages of all investigated Dabie and Sulu eclogites suggest that garnet growth and thus possibly fluid availability were limited to a short time interval over a remarkably large regional scale
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
Timescales from magma mixing to eruption in alkaline volcanism in the Eifel volcanic fields, western Germany
No full text<jats:title>Abstract</jats:title><jats:p>Diffusion profiles in olivine crystals from the final mafic eruption products of the compositionally zoned Laacher See tephra deposit were measured to identify recharge and eruption-triggering events prior to the eruption of the Laacher See volcano (12.9 kyr). These products represent the hybrids of mixing between phonolite and intruding basanite at the bottom of the reservoir, which is likely related to the eruption-triggering event. Additionally, olivine crystals from ten basanitic scoria cones and maar deposits (East Eifel) and two nephelinites (West Eifel) were analyzed to constrain histories of olivine in Quaternary basanite magmas. Olivine crystals from the Laacher See hybrids vary in core composition (Fo<jats:sub>83–89</jats:sub>) and show reversely zoned mantles with high Fo<jats:sub>87.8–89</jats:sub> compared to olivine in East Eifel basanites erupted in nearby, older scoria cones. Towards the crystal margin, olivine in the hybrids develop a normally zoned overgrowth (Fo<jats:sub>86.5–87.5</jats:sub>). Olivine from East Eifel basanites show similar zonation and core compositions (Fo<jats:sub>80–88</jats:sub>) but have less forsteritic mantles (Fo<jats:sub>83–88</jats:sub>) indicating that these basanites are less primitive than those recharging the Laacher See reservoir (&gt; Fo<jats:sub>89</jats:sub>). Olivine in the West Eifel nephelinites show mantles similar to those from Laacher See (Fo<jats:sub>87.5–90</jats:sub>), but have normal zoning and high-Fo cores (Fo<jats:sub>88–92</jats:sub>). This indicates that olivine in the Laacher See hybrids were entrained by a near-primary basanite from older cumulates just before hybridization of the basanite with the phonolite. Diffusion modeling indicates maximum timescales between entrainment and eruption of Laacher See of 30–400 days that are comparable to those calculated for olivine from basanitic scoria cones (10–400 days).</jats:p>
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