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  • 1
    Electronic Resource
    Electronic Resource
    The influence of dimethyl sulphoxide on metabolic activity of ehrlich ascites carcinoma cells and microorganisms (1970)
    Springer
    Cellular and molecular life sciences 26 (1970), S. 506-508 
    Details
    ISSN: 1420-9071
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Zusammenfassung Es wird gezeigt, dass 1–2%iges Dimethylsulfoxyd sich als unschädliches Lösungsmittel für antibakterielle Substanzen besonders gut eignet.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01898475
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  • 2
    Electronic Resource
    Electronic Resource
    Factors influencing nitrous oxide and methane emissions from minerotrophic fens in northeast Germany (1998)
    Springer
    Biology and fertility of soils 28 (1998), S. 1-4 
    Details
    ISSN: 1432-0789
    Keywords: Key words Nitrous oxide ; Methane ; Minerotrophic fens ; Nitrogen fertilization ; Groundwater table
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Geosciences , Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Abstract  At two field sites representing northeastern German minerotrophic fens (Rhin-Havelluch, a shallow peat site; Gumnitz, a partially drained peat site) the influence of different factors (N fertilization, groundwater table, temperature) on N2O and CH4 emissions was investigated. The degraded fens were sources or sinks of the radiatively active trace gases investigated. The gas fluxes measured were much higher than those found in other terrestrical ecosystems such as forests. Lowering the groundwater table increased the release of N2O and the oxidation of CH4. High CH4 emission rates occurred when the groundwater tables and soil temperatures were high (〉12  °C). N fertilization stimulated the release of N2O only when application rates were very high (480 kg N ha–1). A moderate N supply (60 or 120 kg N ha–1) hardly increased the release of N2O in spite of high soluble soil NO3 – contents.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s003740050455
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  • 3
    Electronic Resource
    Electronic Resource
    Contribution of the multibeam acoustic imagery to the exploration of the sea-bottom (1996)
    Springer
    Marine geophysical researches 18 (1996), S. 459-486 
    Details
    ISSN: 1573-0581
    Keywords: Acoustics ; backscattering ; sonar image ; multibeam echo sounder ; sedimentology
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Notes: Abstract Since early 1991, the EM12 dual multibeam echo sounder mounted on R/V L'Atalante has been mainly used for regional mapping and more particularly for EEZ exploration. The acoustic imagery data, which is collected at the same time as the multibeam soundings, and positioned with the same accuracy, illustrates the variability of the acoustic interface. The working principles of the multibeam echo souder are at rirst presented. The backscattering phenomena are then considered, where the echo structure is interpreted in terms of insonified area, propagation loss and backscattering strength; the latter, especially important for the seafloor acoustical characterization, is described as contributions from the interface roughness and the volume inhomogeneities. Problems associated with the seafloor type interpretation from the backscattered level data are briefly evoked. Then, the various operations associated with ‘mosaic’ computations are presented, describing the transition from the original time signals to the final image usable by geologists. Three examples, selected from a large set of data collected by IFREMER for SOPAC (SOPACMAPS Project) and the Territory of New Caledonia (ZoNéCo Project), both in late 1993, show that there are well differentiated acoustic reflectivity levels. After a description of their regional geological environment, the three examples are presented with the main results. These reflectivities, not yet calibrated in terms of field truth, are tentatively related to the previous existing data on the nature of the bottom and to the basic rules of marine sedimentology.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00286090
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  • 4
    Electronic Resource
    Electronic Resource
    Resorption, Extraktion und topographische Verteilung des35S-4-Bromphenylisothiocyanats in der gesunden Haut des Meerschweinchens (1972)
    Springer
    Archives of dermatological research 243 (1972), S. 265-273 
    Details
    ISSN: 1432-069X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Zusammenfassung Auf der gesunden Meerschweinchenhaut wurde die Resorption des 5% 4-Bromphenylisothiocyanats35S gemessen, wobei Siliconöl mit der geringsten Viscosität sich am besten und schnellsten resorbierte. Für Siliconöle mit verschiedener Viscosität wurde eine lineare Abhängigkeit festgestellt. Fast übereinstimmende Ergebnisse ergeben sich nach der Extraktion des freien, chemisch nicht gebundenen Isothiocyanats, das aus Siliconölen nach 24 Std am wenigsten extrahiert wurde. Die histoautoradiographische Auswertung der Intensität und der topographischen Verteilung des markierten Präparats zeigte sich als geeignet für die Dokumentation des Resorptionsvorganges bei verschiedenen Vehikeln. Die Verteilung der Radioaktivität in den Histoautoradiogrammen der Haut bestätigte in vollem Maße die Ergebnisse, die bei der Messung mit Hilfe des GM-Rohres und der Extraktion erzielt waren.
    Notes: Summary Application of 5% 4-bromophenylisothiocyanate35S on the healthy guinea-pig skin showed the highest penetrability in silicone oil with the lowest viscosity. A linear dependence upon the various viscosities of silicone oil was observed. Nearly identical results were obtained by the extraction of free, not chemically bound isothiocyanate. The lowest quantity was extracted from silicone oil after 24 h. In autoradiographs the grain density as well as the topographic distribution of the labelled substance demonstrated the resorption of various vehicles. The radioactivity distribution in histoautoradiogrammes of the skin fully confirmed the results gained by using a GM-tube and by extraction.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00620408
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  • 5
    Electronic Resource
    Electronic Resource
    Kinetik der Resorption des 35S-4-Bromophenylisothiocyanats durch die Haut des Meerschweinchens (1970)
    Springer
    Archives of dermatological research 238 (1970), S. 1-9 
    Details
    ISSN: 1432-069X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Zusammenfassung Das Ziel der Arbeit war, die Resorptionsgeschwindigkeit des 4-Bromphenylisothiocyanats von der Hautoberfläche nach lokaler Applikation in Vehikeln von unterschiedlichen Eigenschaften festzustellen. Durch Applikation des 35S-4-Bromphenylisothiocyanats auf weißen Meerschweinchen wurde festgestellt, daß bei nichtpolaren, mit Wasser nichtmischbaren Vehikeln die Resorptionsgeschwindigkeit in der Reihenfolge Silikonöl-Olivenöl-Lanolin-Vaseline abnimmt. Während 24 Std wird der auf die Oberfläche der depilierten Haut des Meerschweinchens in den angeführten Vehikeln aufgetragene Stoff von der Hautoberfläche quantitativ resorbiert. Durch wiederholte Applikation der Lösung des 4-Bromphenylisothiocyanats in Silikonöl kann binnen einiger Studen eine wesentliche Menge des angeführten Stoffes ohne Entstehung einer lokalen Entzündung in die Haut eingebracht werden. Bei den mit Wasser mischbaren polaren Vehikeln wie Dimethylsulfoxyd und Triäthylenglykol ist die Resorptionsgeschwindigkeit groß, der Stoff wird jedoch hauptsächlich in den Oberflächenschichten der Haut aufgefangen. Auf Grund der erreichten Ergebnisse werden therapeutische Aspekte der Benutzung verschiedener Vehikel bei der Heilung der Dermatomykosen mit Präparaten besprochen, deren antifungale Komponente 4-Bromphenylisothiocyanat ist.
    Notes: Summary The aim of this study was to find the rate of resorption of 4-bromphenylisothiocyanate through the surface of the skin after local application in vehicles of different properties. By application of 4-bromphenylisothiocyanate-35S on white guinea-pigs, it was found that in non-polar vehicles immiscible with water, the rate of resorptin decreases in the following order: silicone oil, olive oil, lanolin-vaseline. In the course of 24 hours the substance applied to the surface of depilated skin of the guinea-pig is resorbed quantitatively from the surface of the skin. By repeated, application of the solution of 4-bromophenylisothiocyanate in silicone oil, in the course of some hours, it is possible, to introduce a considerable amount of the tiven substance into the skin without the rise of local inflamation. In polar vehicles miscible with water like dimethylsulfoxide and triethyleneglycol the rate of resorption is fast, however, the substance is taken up especially by the surface layers of the skin. On the basis of these results the therapeutic aspects are discussed in regards to the use of the different vehicles in the treatment of dermatomycosis by drugs which contain 4-bromophenylisothiocyanate as the antifungal component.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00527099
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  • 6
    Electronic Resource
    Electronic Resource
    First measurement of the strange quark asymmetry at the Z0 peak (1995)
    Springer
    The European physical journal 67 (1995), S. 1-13 
    Details
    ISSN: 1434-6052
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract A measurement of the strange quark forward-backward asymmetry at the Z0 peak was performed using 718,000 multihadronic Z0 decays collected by the DELPHI detector at LEP in 1992. Thes-quark was tagged by the presence of high momentum charged kaons identified by the Ring Imaging Cherenkov detector and byΛ 0;s decaying intopπ−. Thes-quark purity obtained was estimated for the two hadrons to be 43%. The averages-quark asymmetry was found to be 0.131±0.035 (stat.) ±0.013 (syst.). The forward-backward asymmetry was measured for unresolvedd-ands-quarks, tagged by the detection of a high energy neutron or neutral kaon in the Hadron Calorimeter. The combinedd-ands-quark purity was 69% and their asymmetry was found to be 0.112±0.031 (stat.) ±0.054 (syst.).
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01564817
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  • 7
    Electronic Resource
    Electronic Resource
    Lifetime of charged and neutral B hadrons using event topology (1995)
    Springer
    The European physical journal 68 (1995), S. 363-374 
    Details
    ISSN: 1434-6052
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The lifetimes of charged and neutral B hadrons have been measured using data collected by the DELPHI experiment at LEP between 1991 and 1993. B hadrons are tagged as jets with a secondary vertex and the charge of the B candidate is taken to be the sum of the charges of the particles in the secondary vertex. Approximately 1,434,000 multihadronic Z0 decays yielded 1817 B hadron candidates. The B purity was estimated to be around 99.1±0.3%, and 83% (70%) of the events measured as neutral (charged) came from neutral (charged) B's. The mean lifetimes of charged and neutral B hadrons were found to be 1.72±0.08 (stat.) ±0.06 (syst.) ps and 1.58±0.11 (stat.)±0.09 (syst.) ps respectively. The ratio of their lifertimes, τcharged/τneutral, was 1.09 −0.10 +0.11 (stat.)±0.08 (syst.). By making assumptions about the B s 0 and Λ b 0 states, the B+ and B0 meson lifetimes were determined to be τB+ = 1.72 ± 0.08 (stat.) ±0.06 (syst.) ps and τB+ = 1.63 ± 0.14 (stat.)±0.13 (syst.) ps and the ratio of their lifetimes was: τB+/τB0 = 1.06 −0.11 +0.13 ±0.10. The mean B lifetime was also deduced to be 〈 τ 〉 = 1.64 ±0.06 (stat.)±0.04 (syst.) ps.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01620712
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  • 8
    Electronic Resource
    Electronic Resource
    Measurement of the $$\Gamma _{b\bar b} /\Gamma _{had} $$ branching ratio of thez by double hemisphere tagging (1995)
    Springer
    The European physical journal 65 (1995), S. 555-568 
    Details
    ISSN: 1434-6052
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Two measurements of $$\Gamma _{b\bar b} /\Gamma _{had} $$ are presented. Both measurements use 250000Z decays taken with the DELPHI detector in 1991 and rely mainly on the precision of the microvertex detector. One tagging method is as simple as possible so that background rates can be reliably predicted by simulation. The other one uses a more involved tagging technique and reduces the dependence on simulation as much as possible. Combining both results, $$\Gamma _{b\bar b} /\Gamma _{had} $$ is found to be 0.2209±0.0041(stat.)±0.0042(syst.)±0.0018 $$\Gamma _{c\bar c} $$ .
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01578666
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  • 9
    Electronic Resource
    Electronic Resource
    A study of radiative muon-pair events at Z0 energies and limits on an additional Z′ gauge beson (1995)
    Springer
    The European physical journal 65 (1995), S. 603-618 
    Details
    ISSN: 1434-6052
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract An analysis is reported on the channele + e −→μ+μ−(nγ), n=1,2..., using data taken with the DELPHI detector at LEP from 1990 to 1992. Differential cross sections of the radiative photons as a function of photon energy and of the angle between the photon and the muon are presented. No significant deviations from expectations are observed. The data are also used to extract the muon-pair cross section and asymmetry below the Z0 peak by using those events with relatively hard initial state radiative photon(s). The measured cross section and asymmetry show no significant deviation from the Standard Model expectations. These results together with the DELPHI cross section and asymmetry measurements at the LEP energies from the 1990 to 1992 running periods are used to determine limits on the Z0-Z′ gauge boson mixing angle θZ′ and on the Z′ mass. There is no indication of the existence of a Z′; the limits obtained on the mixing angle substantially improve upon existing limits. The 95% confidence level allowed ranges of θZ′ in various models are: $$\begin{gathered} - 0.0070 \leqslant \theta _{Z'} \leqslant 0.0078,E_6 (\chi )\bmod el, \hfill \\ - 0.0075 \leqslant \theta _{Z'} \leqslant 0.0095,E_6 (\psi )\bmod el, \hfill \\ - 0.029 \leqslant \theta _{Z'} \leqslant 0.029,E_6 (\eta )\bmod el, \hfill \\ - 0.0068 \leqslant \theta _{Z'} \leqslant 0.0082,L - R(1.)\bmod el, \hfill \\ - 0.0057 \leqslant \theta _{Z'} \leqslant 0.0077,L - R(\sqrt 2 )\bmod el. \hfill \\ \end{gathered} $$
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01578669
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  • 10
    Electronic Resource
    Electronic Resource
    Strange baryon production in Z hadronic decays (1995)
    Springer
    The European physical journal 67 (1995), S. 543-553 
    Details
    ISSN: 1434-6052
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract A study of the production of strange octet and decuplet baryons in hadronic decays of the Z recorded by the DELPHI detector at LEP is presented. This includes the first measurement of the∑ ± average multiplicity. The total and differential cross sections, the event topology and the baryon-antibaryon correlations are compared with current hadronization models.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01553980
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