ALBERT

All Library Books, journals and Electronic Records Telegrafenberg

feed icon rss

Your email was sent successfully. Check your inbox.

An error occurred while sending the email. Please try again.

Proceed reservation?

Export
Filter
  • Articles  (20)
  • Springer  (15)
  • American Institute of Physics (AIP)  (4)
  • Springer Nature  (1)
  • American Society of Hematology
  • EDP Sciences
  • 1985-1989  (20)
Collection
  • Articles  (20)
Publisher
Year
  • 1
    Electronic Resource
    Electronic Resource
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 88 (1988), S. 3434-3440 
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: The fluorescence from optically excited Ag atoms in Ar, Kr, and Xe matrices has been investigated in a time-resolved synchrotron-radiation study. A detailed energy dissipation model could be established from a systematic analysis of rise and decay times of all the observed fluorescence bands after pulsed excitation into the Ag (4d105p)2P1/2,3/2 levels, and by setting time windows between the excitation pulses in emission and emission-yield spectroscopy. Although the overall wavelength dependence of the decay time follows the λ3 law, the decay time is independent of λ within a given emission band. Finally, the role of energy transfer between Ag atoms and dimers for the evaluation of decay times is briefly addressed.
    Type of Medium: Electronic Resource
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 2
    Electronic Resource
    Electronic Resource
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 86 (1987), S. 1147-1151 
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: The optical properties of small Zn clusters, especially of Zn2 and Zn3, isolated in neon have been studied over a wide photon energy range by absorption, emission, and photoelectron spectroscopy. By employing emission yield spectroscopy the optical transitions of the dimer and the trimer could be unequivocally distinguished from those of higher clusters in the matrix. For Zn2, the experimental data compare reasonably well with calculations found in the literature. However, the ground state, which is usually calculated to be nonbinding, is found to be bound. The main absorption bands of at least three more Zn clusters, tentatively assigned to Zn4–Zn6, have been derived from the concomitant growth of bands in a systematic concentration study.
    Type of Medium: Electronic Resource
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 3
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: The optical spectra of palladium in neon and argon matrices containing up to 100% dinitrogen have been studied. Beside the known bands of isolated Pd atoms new strong bands assigned to weakly bonded Pd(N2)m (m=1, 2) complexes appear. The bands are attributed to three different types of transition. The dominant lines are essentially due to transitions localized at the Pd atom but strongly perturbed by a "crystal field'' due to the weakly bonded N2 molecules. Secondly, a vibrational progression at lower energies is assigned to a Pd to N2 charge transfer transition and thirdly, at high energies, a vibrational progression assigned to a locally excited state of an N2 molecule perturbed by weak bonding to Pd is observed. No evidence has been found for the presence of Pd(N2)3. Photoelectron spectra of the Pd(N2)m complexes in neon have been observed. The Pd 4d photoemission peak is shifted with respect to the Pd atom in Ne by ∼1.1 eV to higher binding energies.
    Type of Medium: Electronic Resource
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 4
    Electronic Resource
    Electronic Resource
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 82 (1985), S. 1623-1630 
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: The electronic spectra of nickel atoms isolated in matrices of the four noble gases have been assigned in considerable detail. The associated experimental and theoretical study has unequivocally revealed that nickel atoms can simultaneously exist in two electronic ground states, 3d94s1:3D3 and 3d84s2:3F4, in argon, krypton, and xenon matrices where they also occupy at least three different trapping sites. In neon they appear to exist in one site and one state, 3d84s2:3F4, only. In argon, krypton, and xenon matrices the 3D3 is the dominant ground state. Some sites occupied by atoms in the 3F4 ground state can be annealed away, but others are found to be stable to this procedure. The effects of the matrix upon the guest atoms are briefly discussed. It is interesting that only one possible case of band splitting can be identified in the spectra though the observed blue shifts are of the usual magnitude.
    Type of Medium: Electronic Resource
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 5
    Electronic Resource
    Electronic Resource
    Springer
    Engineering with computers 5 (1989), S. 177-193 
    ISSN: 1435-5663
    Source: Springer Online Journal Archives 1860-2000
    Topics: Computer Science , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Technology
    Notes: Abstract This paper presents an algorithm for the generation of Delaunay triangulations for general nonmanifold geometric models. Octree concepts are used for point placement and providing the linear, with respect to the number of elements, growth rate of the algorithm. Compatibility and classification procedures are used in conjunction with point injection procedures to ensure that the final Delaunay triangulation is a geometric triangulation of the domain of interest.
    Type of Medium: Electronic Resource
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 6
    ISSN: 1432-0649
    Keywords: 42.55G ; 42.60D
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The use of an optical cavity containing a stimulated Brillouin scattering (SBS) phase-conjugate reflector to control the spatial and spectral output of a long pulse (〉100 ns) X-ray preionized XeCl laser is reported. The divergence of the 3×4 cm2 output beam has been improved by a factor of ∼20 to 〈150 μrad. The temporal form of the output depends on the acoustic decay times of the liquid and gaseous SBS media used. Four-wave mixing via gain saturation has been observed within the discharge volume, leading to depolarisation of the output beam.
    Type of Medium: Electronic Resource
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 7
    Electronic Resource
    Electronic Resource
    Springer
    Bulletin of environmental contamination and toxicology 38 (1987), S. 946-953 
    ISSN: 1432-0800
    Source: Springer Online Journal Archives 1860-2000
    Topics: Energy, Environment Protection, Nuclear Power Engineering , Medicine
    Type of Medium: Electronic Resource
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 8
    ISSN: 1432-2285
    Keywords: Aluminum ; Calcium ; Fine roots ; Microbeam analysis ; Picea abies ; Soil acidification
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Summary A novel stable isotope labelling procedure for microbeam analysis was developed to monitor exchange and uptake of nutrients, primarily Mg, K and Ca, by root tips at the cellular level. Initially root samples were analysed from 2-year-old spruce trees, originating both from a nursery and from a polluted forest site, (1) for the cortex cell wall accessibility and nutrient binding properties, (2) for the influence of low pH and elevated aluminum concentrations on Ca binding to cortex cell walls, and (3) for long-range transport into the secondary xylem, proximal to the labelled root tip. In nursery control plants, Ca is localized mainly in the apoplast of the cortex. Exchange of Mg, K, Ca in the cell wall of the cortex and the primary xylem with label in incubation solutions is almost completed to equilibration within 30 min. In the secondary xylem we could detect Mg, K, and Ca from labelling solutions in minute amounts after 30 min, and as a major fraction after 48 h. This indicates that stable isotope labelling can be used to study both ion-exchange properties of the apoplast and long-range transport. Slight acidification of the labelling incubation media to pH 4.5 reduced Ca binding to the cortex cell walls slightly, but acidification to the extreme value of pH 2.3 reduced binding 41%. A combination of pH 4.5 and increased free aluminum reduced the binding by 83%. In a preliminary attempt to analyse the nutrient binding capability of the root-tip apoplast from pollution affected trees, we exposed fine roots of 2-year-old spruce from an acidified and polluted site showing typical low levels of Ca and Mg in the cortical cell walls to Ca-enriched media. Under these conditions the Ca content of cortex cell walls doubled upon incubation at pH 4.7, reaching 40% of the total binding capacity of our nursey control plants.
    Type of Medium: Electronic Resource
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 9
    Electronic Resource
    Electronic Resource
    Springer
    Meteorology and atmospheric physics 38 (1988), S. 246-251 
    ISSN: 1436-5065
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geography , Physics
    Notes: Summary Based on a comprehensive review of scientific sources from the 17th and 18th century, a new table of auroras for the years 1645–1705 is presented. Comparison of these data with long-time German recordings (latitude 50 to 55 N) demonstrates that the assumption of the Maunder Minimum is not confirmed by the data of the auroras.
    Type of Medium: Electronic Resource
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 10
    Electronic Resource
    Electronic Resource
    Springer
    European journal of wildlife research 33 (1987), S. 106-120 
    ISSN: 1439-0574
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Description / Table of Contents: Summary The Munich method evaluates roe deer hunting districts in the Bavarian State forest according to their suitability as natural habitats. Indefinite estimates of population parameters are avoided. Stratified according to growth tones, 32 representative Bavarian State hunting districts were selected and described according to those landscape parameters which could characterise the habitat of roe deer. In choosing the landscape characteristics, it was borne in mind that these have to be easily and objectively measured. 34 roe deer experts, scientists and practitioners with wide regional experience from the Federal Republic of Germany, Austria and Switzerland analysed the chosen districts on the basis of the descriptions. Their evaluations formed the basis of a regression analysis, the result of which is a formula for the estimation of the value of the district. It contains those landscape characteristics which, on the basis of the experts' judgement, most clearly reflect the value of the habitat. The validation of the results led to the derivation of the following definitive evaluation formula: $$RG = 3,94 + 1,46 WRF + 0,04 SON - 0,02 SCH - KON - BES$$ . RG = Value of district as roe deer habitat WRF = Area of woodland fringe: i.e. length of woodland edge × 10 m as a percentage of the total district area SON = Proportion of the area of all woodland species apart from spruce and pine to the district area SCH = Number of days per annum with snow lying to a depth of over 20 cm KON = Correction factor for interspecific competition by red deer and fallow deer BES = Correction factor for visitor pressure and disturbance.
    Abstract: Résumé La méthode munichoise cote l'aptitude, comme habitat naturel, des territoires de chasse à Chevreuil dans la forêt domaniale bavaroise. Des estimations incertaines de paramètres de population sont évitées. 32 territoires de chasses domaniaux bavarois, représentatifs des régions de croissance, ont été sélectionnés et décrits par des caractéristiques paysagères significatives de l'habitat de l'espèce. Lors du choix de ces caractéristiques, on a veillé à ce qu'elles se prêtent à une appréciation simple et objective. 34 experts en Chevreuil, scientifiques et praticiens dotés d'une expérience trans-régionale, originaires d'Allemagne fédérale, Autriche et Suisse firent une évaluation des territoires retenus sur base des caractéristiques en question. Leurs évaluations constituèrent le point de départ d'une analyse de régression qui déboucha sur une formule de cotation de la bonité des stations à Chevreuil. Elle fait intervenir les caractéristiques paysagères qui, aux dires des avis des experts, reflètent le plus clairement la bonité de l'habitat. Après avoir testé les résultats, la formule de cotation suivante fut retenue: $$RG = 3,94 + 1,46 WRF + 0,04 SON - 0,02 SCH - KON - BES$$ où RG = bonité stationnelle WRF = suiperficie de la lisière forestière; longueur de la lisière forestière × 10 m en % de la surface du territoire de chasse SON = pourcentage de toutes les essences forestières, à l'exception de l'Epicéa et du Pin, par rapport à la surface totale SCH = nombre de jours par an avec un enneigement supérieur à 20 cm KON = correctif de concurrence interspécifique Cerf-Daim BES = correctif lié aux facteurs de dérangement (pression récréative).
    Notes: Zusammenfassung Das Münchner Verfahren bewertet Rehwildreviere im Bayerischen Staatsforst in ihrer Eignung als natürlicher Lebensraum. Unsichere Schätzungen von Populationsparametern werden vermieden. Nach Wuchsgebieten geschichtet, wurden 32 bayerische Staatsjagdreviere repräsentativ ausgewählt und durch jene landschaftlichen Merkmale beschrieben, die den Lebensraum von Rehwild charakterisieren könnten. Bei der Auswahl der Landschaftsmerkmale wurde darauf geachtet, daß diese einfach und objektiv zu erheben sind. 34 Rehwild-Experten, Wissenschaftler und Praktiker mit überregionaler Erfahrung aus der Bundesrepublik Deutschland, Österreich und der Schweiz bewerteten die ausgewählten Reviere anhand der Beschreibungen. Ihre Bewertungen bildeten die Grundlage zu einer Regressionsanalyse, deren Ergebnis eine Formel zur Schätzung der Reviergüte ist. Sie enthält diejenigen Landschaftsmerkmale, die aufgrund der Expertenurteile die Güte des Lebensraums am deutlichsten widerspiegeln. Nach der Verprobung der Ergebnisse ergab sich folgende endgültige Bewertungsformel: $$RG = 3,94 + 1,46 WRF + 0,04 SON - 0,02 SCH - KON - BES$$ Dabei sind: RG: Reviergüte WRF: Waldrandfläche; Waldrandlänge × 10 m in Prozent der Revierfläche SON: Anteil aller Baumarten außer Fichte und Kiefer an der Revierfläche SCH: Anzahl der Schneetage mit einer Schneehöhe über 20 cm pro Jahr KON: Korrekturfaktor interspezifischer Konkurrenz durch Rot- und Damwild BES: Korrekturfaktor Besucherdruck, Störung.
    Type of Medium: Electronic Resource
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
Close ⊗
This website uses cookies and the analysis tool Matomo. More information can be found here...