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  • 1
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    Does urbanization affect the seasonal dynamics of bird communities in urban parks? (2016)
    Springer
    Details
    Publication Date: 2016-01-13
    Print ISSN: 1083-8155
    Electronic ISSN: 1573-1642
    Topics: Architecture, Civil Engineering, Surveying , Energy, Environment Protection, Nuclear Power Engineering
    Published by Springer
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    PAPER CURRENT
  • 2
    Electronic Resource
    Electronic Resource
    Nouvel Iridoide des Fruits de Lonicera alpigena (1981)
    s.l. : American Chemical Society
    Journal of natural products 44 (1981), S. 573-575 
    Details
    ISSN: 1520-6025
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/np50017a011
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Analysis of gravity waves in the tropical middle atmosphere over La Reunion Island (21°S, 55°E) with lidar using wavelet techniques (2000)
    Springer
    Annales geophysicae 18 (2000), S. 485-498 
    Details
    ISSN: 0992-7689
    Keywords: Meteorology and atmospheric dynamics (climatology; middle atmosphere dynamics; waves and tides)
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Notes: Abstract The capabilities of the continuous wavelet transform (CWT) and the multiresolution analysis (MRA) are presented in this work to measure vertical gravity wave characteristics. Wave properties are extracted from the first data set of Rayleigh lidar obtained between heights of 30 km and 60 km over La Reunion Island (21°S, 55°E) during the Austral winter in 1994 under subtropical conditions. The altitude-wavelength representations deduced from these methods provide information on the time and spatial evolution of the wave parameters of the observed dominant modes in vertical profiles such as the vertical wavelengths, the vertical phase speeds, the amplitudes of temperature perturbations and the distribution of wave energy. The spectra derived from measurements show the presence of localized quasi-monochromatic structures with vertical wavelengths 〈10 km. Three methods based on the wavelet techniques show evidence of a downward phase progression. A first climatology of the dominant modes observed during the Austral winter period reveals a dominant night activity of 2 or 3 quasi-monochromatic structures with vertical wavelengths between 1/2 km from the stratopause, 3/4 km and 6/10 km observed between heights of 30 km and 60 km. In addition, it reveals a dominant activity of modes with a vertical phase speed of −0.3 m/s and observed periods peaking at 3/4 h and 9 h. The characteristics of averaged vertical wavelengths appear to be similar to those observed during winter in the southern equatorial region and in the Northern Hemisphere at mid-latitudes.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s00585-000-0485-0
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  • 4
    Electronic Resource
    Electronic Resource
    Effets eutrophiques au débouché d'un grand fleuve (Grand Rhône) (1969)
    Springer
    Marine biology 3 (1969), S. 233-242 
    Details
    ISSN: 1432-1793
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Description / Table of Contents: Résumé 1. Une étude des paramètres hydrologiques et biologiques a été éffectuée dans les eaux de surface proche de l'embouchure du Rhône. Les facteurs suivants ont été étudiés: salinités, températures, analyse quantitative et qualitative des populations zooplanctoniques et phytoplanctoniques. Les concentrations en chlorophylle a, seston et matière organique ont été déterminées. 2. Ces recherches ont permis de montrer l'hétérogénéité de la structure hydrologique près de l'embouchure du Rhône. Elles nous ont aussi amené à considérer avec prudence l'interprétation des facteurs biologiques en fonction de cette structure hydrologique. 3. Les valeurs numériques concernant le zooplancton sont 10 fois supérieures à celles relevées en Méditérranée. 4. Des concentrations élevées de phytoplancton d'eaux douces et saumâtres ont été relevées dans la zone de dilution, mais ces cellules sont mortes ou en survie; les faibles concentrations de chlorophylle a semblent confirmer cette observation.
    Notes: Abstract A study of hydrographical and biological parameters has been undertaken in surface waters near the mouth of the Rhône. Salinity, temperature and nutrient salts have been recorded, and the phytoplankton, as well as the zooplankton, quantitatively and qualitatively analyzed. Furthermore, the concentrations of chlorophyll a, seston, and organic matter have been determined. The hydrographical structure near the Rhône is heterogenous. The biological results are diffcult to explain on the basis of hydrographical parameters. The numerical data of zooplankton in the investigated area are 10 times higher than those of the Mediterranean Sea. There is a great abundance of brackish and freshwater phytoplankton in the dilution zone, but these cells are dead or almost dead; these observations coincide with the low concentrations of chlorophyll a.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00360956
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  • 5
    Electronic Resource
    Electronic Resource
    Effets de l'eutrophie et de la dessalure sur les populations phytoplanctoniques (1970)
    Springer
    Marine biology 5 (1970), S. 283-293 
    Details
    ISSN: 1432-1793
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Description / Table of Contents: Résumé 1. L'étude que nous avons entreprise sur les eaux de surface du golfe de Fos a permis de mettre en évidence (a) une forte dessalure: 14‰〈S〈32‰; (b) une réserve nutritive très importante: 1,41 μatg/l ≤P.PO4≤6,14 μatg/l; 0,7 μatg/l≤N-NO3≤29,3 μatg/l; (c) des populations phytoplanctoniques à fort effectif numérique (maximum 75·106 cell/l), de 2 à 15 fois plus élevé que les maxima méditerranéens observés jusqu'à ce jour. Ces fortes concentrations cellulaires semblent plus ou moins inhiber l'assimilation chlorophyllienne relative, (concentration en chlorophylle pour un million de cellules). 2. Des valeurs très importantes pour le carbone particulaire ont été trouvées, dues probablement à un taux très élevé de carbonates d'origine minérale amenés par les caux douces. Ceci semble confirmé par les valeurs des rapports C/N.
    Notes: Abstract A study undertaken in the surface waters of the Gulf of Fos (France), revealed very low salinities, high nutrient concentrations, and very rich phytoplanktonic populations (maximum 7.5·105 cells/l). Very often the phytoplanktonic populations attain abundances 2 to 15 times higher than maximum population densities found in the Mediterranean Sea. Such high cellular concentrations seem to suppress more or less the rates of relative photosynthesis if the concentration of chlorophyll a per 1 million cells is considered. Furthermore, the analysis of particular carbon yields high values. This phenomenon can be explained by the fact that, in addition to organic carbon, other organic forms of carbon were measured, especially some carbonates which are abundant in fresh waters. The C/N ratios found seem to support this explanation.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00346893
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  • 6
    Electronic Resource
    Electronic Resource
    Écologie d'un milieu eutrophique: traitement mathématique des données (1972)
    Springer
    Marine biology 14 (1972), S. 120-129 
    Details
    ISSN: 1432-1793
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Description / Table of Contents: Résumé | 1. Les nombreuses données concernant divers paramètres physiques, chimiques et biologiques de la nappe de dilution rhodanienne ont été traitées au moyen de techniques multivariées: analyse en composantes principales, Part correlation multiple. Une technique originale de partition en classes d'équivalence est proposée. Un des avantages de cette méthode est de ne pas faire d'hypothèse sur l'indépendance ou la normalité des axes. 2. Ce traitement nous a permis de mettre en évidence des communaités d'espèces très euryhalines en ce qui concerne le zooplancton, et une indifférence assez poussée du phytoplancton vis à vis des fluctuations de la salinité. Le facteur température semble par contre avoir une importance écologique prépondérante. 3. Il est curieux de constater, d'autre part, que l'instabilité et l'eutrophie de la zone considérée ne semble pas perturber profondément le cycle phytoplanctonique. On retrouve en effet à peu près les successions classiques de populations. 4. Deux paramètres d'évaluation de la biomasse phytoplanctonique (chlorophylle a) et zooplanctonique (matière organique) semblent assez mal adaptés à l'étude de cette région.
    Notes: Abstract Numerous data on physical, chemical and biological parameters in the dilution layer of the Rhône mouth have been studied by multivariate techniques: principal-component analysis, part correlation. A new technique of cluster analysis is also proposed. By these means, a very euryhaline group of zooplankton species has been isolated and the extremely low sensibility of phytoplankton towards salinity has been shown. However, temperature seems to be the most important ecological factor. Instability and eutrophy of this area do not appear to disturb the phytoplankton cycle, which occurs with its usual succession. Chlorophyll a and organic matter do not seem of value for estimation of the biomass in the area studied.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00373211
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  • 7
    Electronic Resource
    Electronic Resource
    Effects of petroleum hydrocarbons on the cytochrome P450 content of the mollusc bivalveMytilus galloprovincialis (1984)
    Springer
    Marine biology 80 (1984), S. 155-159 
    Details
    ISSN: 1432-1793
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract The cytochrome P450, identified by the characteristic 450 nm spectral peak of its carbon monoxide complex, was detected in the hepatopancreatic microsomes ofMytilus galloprovincialis, collected from Ponteau (Bay of Fos, France) in 1982 and 1983. When mussels were exposed to a variety of petroleum hydrocarbons, the cytochrome P450 content increased. It is shown that aromatic hydrocarbons are more effective than alkanes in inducing a high level of cytochrome P450. The possible use of this haemoprotein in hydrocarbon pollutant detection is discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02180182
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  • 8
    Electronic Resource
    Electronic Resource
    Potentiometric and optical resolution of cytochromes c and c 1 in purified mitochondria from higher plant tissue, solanum tuberosum (1988)
    Springer
    European biophysics journal 16 (1988), S. 259-265 
    Details
    ISSN: 1432-1017
    Keywords: Potentiometry ; cytochrome ; plant mitochondria ; rapid scan spectrometry
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Physics
    Notes: Abstract Mitochondrial cytochromes c and c 1 have long been considered indistinguishable from a potentiometric point of view. By combining rapid scan spectrometry to run redox titrations with numerical analysis using a generalized Nernst equation, it was possible to resolve cytochrome c and c 1 midpoint potentials in yeast and mushroom mitochondria. In the reported work, this approach has been applied to purified mitochondria from higher plant tissue (Solanum tubersosum L.). The rapid scan spectrometric technique provided clear evidence of reversible base line changes monitored by redox potential changes. The basic mechanism responsible for this modification in the mitochondria optical properties remains to be defined. However, we suggest that this phenomenon could play a regulatory role in the overall electron transfer process. It is necessary to make an initial correction of the recorded spectra prior to numerical analysis. When this is done, two midpoint potential values are resolved by running analyses in the 550–555 nm range: 283±3 m V and 213±11 m V. They are identical to the ones found for cytochromes c and c 1 in yeast and mushroom mitochondria. The individual difference α bands were resolved by running analyses at each wavelength of the corrected spectra, the resolved midpoint potentials being kept fixed. This approach, the only one to date which has succeeded in resolving mitochondrial cytochrome c and c 1 midpoint potentials, is discussed with respect to other methods. Limitations are pointed out.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00254061
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  • 9
    Electronic Resource
    Electronic Resource
    Atomic radial distributions as a diagnostic of excitation processes in a low pressure neon discharge
    Amsterdam : Elsevier
    Physica B+C 104 (1981), S. 441-450 
    Details
    ISSN: 0378-4363
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Physics
    Type of Medium: Electronic Resource
    URL: http://linkinghub.elsevier.com/retrieve/pii/0378-4363(81)90193-5
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  • 10
    Electronic Resource
    Electronic Resource
    Population transfer on Ne metastable atoms
    Amsterdam : Elsevier
    Physics Letters A 53 (1975), S. 243-244 
    Details
    ISSN: 0375-9601
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Physics
    Type of Medium: Electronic Resource
    URL: http://linkinghub.elsevier.com/retrieve/pii/0375-9601(75)90424-7
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