76 research outputs found
Managementlehre für Familienunternehmen: Bestandsaufnahme der Forschungs- und Lehraktivitäten im deutschsprachigen Raum
In Veröffentlichungen werden Familienunternehmen zunehmend als eigenes wichtiges Thema erkannt. In Forschung und Lehre wird dieses Thema allerdings noch nicht ausreichend differenziert betrachtet, obwohl mittelständische Familienunternehmen die zahlenmäßig weitaus bedeutendste Form aller Unternehmen in Deutschland darstellen. Ein Forschungsprojekt an der Hochschule für Wirtschaft und Recht Berlin untersucht die Fragen, inwieweit die Themen Familienunternehmen und Mittelstand als Lehr- und Forschungsthema im deutschsprachigen Raum präsent sind und wie diese ggf. in bestehenden Strukturen abgebildet werden. Die Ergebnisse der Untersuchung sind in einer öffentlich zugänglichen Datenbank recherchierbar aufbereitet, die als zentraler Einstieg für Forschende und Lehrende den Themen Familienunternehmen und Mittelstand auch zu einem höheren Stellenwert in der Betriebswirtschaftslehre verhelfen soll.The topic family business is becoming more and more important in publications. But it still has not a portentous position in research and teaching, although small and medium-sized family businesses are numerically far the most important type of business in Germany. A research project at Berlin School of Economics and Law examines, how Mittelstand and small and medium-sized family businesses are present in the German speaking countries as a teaching and research topic and how they exist in organizational structures (e.g. course of studies). The results of the investigation are offered in a publicly accessible database, that should be used as an entry point for researchers and teachers
Research cruise data on the biology of the lesser flying suid, <em>Todaropsis eblanae</em> in the North Sea
A total of 324 specimens of the ommastrephid squid Todaropsis eblanae, collected from bottom trawl surveys in the North Sea was examined. Information on seasonal length frequency distributions and relationships of beak size to mantle length and wet body mass from the northernmost distribution of the species is supplied. The overall male: female ratio was 1: 0.78. Maturing males and females were found in winter and summer, while fully mature animals were observed only in summer. Sexual maturity in females occurred in bigger sizes than in males. Specimens were caught in water depths between 56 and 170 m throughout the whole investigated area except from the German Bight. This paper presents the first biological data on T. eblanae in the North Sea derived from scientific surveys
Alternative data reduction for precise and accurate isotope ratio determination via LA-MC-ICP-MS
An alternative approach for the evaluation of isotope ratio data using LA-MC-ICP-MS will be presented. In contrast to previously applied methods it is based on the simultaneous
responses of all analyte isotopes of interest and the relevant interferences without performing a conventional background correction.
Significant improvements in precision and accuracy can
be achieved when applying this new method and will be
discussed based on the results of two first methodical
applications: a) radiogenic and stable Sr isotopes in carbonates b) stable chlorine isotopes of pyrohydrolytic extracts.
In carbonates an external reproducibility of the 87Sr/86Sr
ratios of about 19 ppm (RSD) was achieved, an improvement
of about a factor of 5. For recent and sub-recent marine
carbonates a mean radiogenic strontium isotope ratio 87Sr/86Sr of 0.709170 ± 0.000007 (2SE) was determined, which agrees well with the value of 0.7091741 ± 0.0000024 (2SE) reported for modern sea water [1].
Stable chlorine isotope ratios were determined ablating
pyrohydrolytic extracts with a reproducibility of about 0.05‰ (RSD). For basaltic reference material JB1a and JB2 chlorine isotope ratios were determined relative to SMOC (standard mean ocean chlorinity) δ37ClJB-1a = (-0.99 ± 0.06) ‰ and δ37ClJB-2 = (-0.60 ± 0.03) ‰ (2SE), respectively, in accordance with published data [2].
The described strategies for data reduction are considered
to be generally applicable for all isotope ratio measurements using LA-MC-ICP-MS.
[1] McArthur, Rio, Massari, Castradori, Bailey, Thirlwall &
Houghton (2006) Palaeogeo. Palaeoclim. Palaeoeco. 242,
126, doi: 10.1016/j.palaeo.2006.06.004 [2] Fietzke,. Frische, Hansteen & Eisenhauer (2008) J. Anal. At. Spectrom. 2008, doi:10.1039/B718597A
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An alternative data acquisition and evaluation strategy for improved isotope ratio precision using LA-MC-ICP-MS applied to stable and radiogenic strontium isotopes in carbonates
Strontium isotopes in various marine carbonates were determined using an “AXIOM” MC-ICP-MS in combination with a NewWave UP193 laser ablation unit. Using a modified measurement and data reduction strategy, an external reproducibility of 87Sr/86Sr ratios in carbonates of about 19 ppm (RSD) was achieved. For recent and sub-recent marine carbonates a mean radiogenic strontium isotope ratio 87Sr/86Sr of 0.709170 ± 0.000007 (2SE) was determined, which agrees well with the value of 0.7091741 ± 0.0000024 (2SE) reported for modern sea water (J. M. McArthur, D. Rio, F. Massari, D. Castrodi, T. R. Bailey, M. Thirlwall and S. Houghton, Palaeogeogr. Palaeoclimatol. Palaeoeco., 2006, 242(126), 2006). Compared to published laser-based methods, an improved accuracy and precision was achieved by applying a new data reduction protocol using the simultaneous responses of all isotopes measured. The latter is considered as a new principal approach for isotope ratio evaluation using LA-MC-ICP-MS. A major advantage of the presented method is the direct determination of the stable strontium isotope fractionation. Providing reproducible sample ablation, introduction into the plasma and stable plasma condition, this method excludes the efforts of a quantitative strontium recovery after ion chromatographic separation to avoid additional fractionation of the sample strontium due to chemical pre-treatment/separation (ion chromatography and solution preparation), and is therefore, together with the quicker sample preparation and spatially resolved analysis, advantageous when compared to published solution–nebulization bracketing-standard MC-ICP-MS methods for stable strontium isotope determination
Gonatus fabricii (Lichtenstein, 1818)
info:eu-repo/semantics/publishedVersio
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