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  • Springer  (33)
  • American Physical Society  (4)
  • Paleontological Society  (4)
  • American Geophysical Union  (1)
  • American Institute of Physics (AIP)  (1)
  • American Meteorological Society (AMS)
  • 1990-1994  (43)
  • 1994  (13)
  • 1992  (14)
  • 1990  (16)
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  • 1990-1994  (43)
Year
  • 1994  (13)
  • 1992  (14)
  • 1990  (16)
  • 1993  (11)
  • 1991  (14)
  • 1
    Electronic Resource
    Electronic Resource
    Glycosylation of glycoprotein 55 encoded by the anaemia-inducing strain of Friend spleen focus-forming virus (1994)
    Springer
    Glycoconjugate journal 11 (1994), S. 133-139 
    Details
    ISSN: 1573-4986
    Keywords: Friend spleen focus-forming virus ; glycoprotein ; oligosaccharide processing ; SFFV
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract Normal rat kidney cells, non-productively infected with the anaemia-inducing variant of Friend spleen focus-forming virus (F-SFFVA), were metabolically labelled with [2-3H]mannose. The primary translation product of the viral envelope gene (env), representing a glycoprotein with an apparent molecularM r of 55 000 (gp55), was isolated from cell lysates by immunoaffinity chromatography and purified by preparative SDS/PAGE. Radiolabelled oligosaccharides, released from tryptic glycopeptides by treatment with endo-β-N-acetylglucosaminidase H, were characterized chromatographically, by enzymic digestion and by acetolysis. The results revealed that F-SFFVA gp55 obtained from this source carried predominantly oligomannose type sugar chains with five to nine mannoses. As a characteristic feature, glycans with seven to nine mannoses contained, in part, an additional glucose residue. Although the amount of glucosylated species found was higher in F-SFFVA gp55 (about 25% of total endo-H-sensitive oligosaccharides) than in gp55 of the corresponding polycythaemia-inducing variant (F-SFFVP, 16.3%), the overall glycosylation pattern of the F-SFFVA env product closely resembled that of F-SFFVP gp55 [Strubeet al. (1988)J Biol Chem 263:3762–71]. Hence, our results demonstrate that the different intracellular processing and transport of the primary F-SFFVA env product cannot be attributed to aberrant trimming of its oligomannose type glycans.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00731153
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  • 2
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    Glycosylation of glycoprotein 55 encoded by the anaemia-inducing strain of Friend spleen focus-forming virus (1994)
    Springer
    Details
    Publication Date: 1994-04-01
    Print ISSN: 0282-0080
    Electronic ISSN: 1573-4986
    Topics: Chemistry and Pharmacology
    Published by Springer
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    PAPER CURRENT
  • 3
    Electronic Resource
    Electronic Resource
    Surface modification during scanning tunneling microscope measurements on YBa2Cu3O7 thin films (1994)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 76 (1994), S. 7774-7777 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: During scanning tunneling microscopy measurements on YBa2Cu3O7 thin films with positive sample bias voltages, different kinds of surface modifications appear. While in the topography condition no surface modification occurs, the cleaning and etching conditions irreversibly change the surface topography. In the deformation condition a strong elastic deformation of the tip and/or the surface is observed. It is shown that field evaporation of material from the surface to the tip is responsible for the observed surface modification. In consequence, the tip is contaminated with different oxides. Localized states in the oxides make resonant tunneling of electrons through the oxide layer possible. The configuration of these localized states determines the kind of surface modification by the scanning tunneling microscope. © 1994 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.357955
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  • 4
    Electronic Resource
    Electronic Resource
    A deterministic particle-method solving the linearized Boltzmann equation (1990)
    Springer
    Computing 43 (1990), S. 199-207 
    Details
    ISSN: 1436-5057
    Keywords: 65C99 ; Particle methods ; linearized Boltzmann equation ; Gauss integration
    Source: Springer Online Journal Archives 1860-2000
    Topics: Computer Science
    Description / Table of Contents: Zusammenfassung In [3] ist eine Partikelmethode vorgestellt, die unendlich viele Partikel benötigt. Zu ihrer numerischen Implementierung muß der numerisch relevante Träger abgeschätzt werden. Um dies zu vermeiden, führen wir über die Gasß-Integration eine a priori endliche Form ein und stellen numerische Ergebnisse für verschiedene Testbereiche vor.
    Notes: Abstract In [3] a particle method is proposed which acts on an infinite grid. Hence, for a numerical application an estimation of the numerically relevant support is necessary. To overcome this difficulty we suggest a finite grid based on Gaussian integration formulas and present numerical results of different test examples.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02242917
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  • 5
    Electronic Resource
    Electronic Resource
    Studies on the ascorbic acid metabolism of callitrichid monkeys by14C isotope excretion technique (1990)
    Springer
    European journal of nutrition 29 (1990), S. 192-196 
    Details
    ISSN: 1436-6215
    Keywords: Ascorbic acid metabolism ; Callitrichidae ; stress ; 14CO2-excretion ; Ascorbinsäurestoffwechsel ; Krallenaffen ; Streß ; 14CO2-Ausscheidung
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition , Medicine
    Description / Table of Contents: Zusammenfassung Bei den beiden Affenarten Callithrix jacchus und Saguinus fuscicollis, die der gleichen Neuweltaffenfamilie der Krallenaffen angehören, wurden extrem unterschiedliche Serumascorbatspiegel gefunden, obwohl die Tiere unter identischen Bedingungen in derselben Kolonie gehalten wurden. Die14C-Ausscheidung von oral verabreichter 1-14C-AA wurde unter marginaler wie auch reichlicher Vitamin-C-Versorgung sowie unter Streßbedingungen untersucht. Zwischen niedriger und hoher Vitamin-C-Versorgung traten große Unterschiede im14C-Ausscheidungsmodus auf. Der Speziesunterschied war dabei geringer als der Unterschied zwischen individuellen Streß-/Nichtstreß-Bedingungen, aber in beiden Fällen war er gleichartig. In vergleichbaren Versuchen reagierte S. fuscicollis derart, daß ein höherer Streßzustand bei dieser Spezies angenommen werden kann.
    Notes: Summary Recently it has been found that the two monkey species Callithrix jacchus and Saguinus fuscicollis, both belonging to the same New World monkey family Callitrichidae and held in the same colony under identical conditions, had extremely different serum ascorbate levels. To examine the ascorbic acid metabolism the14C-excretion of orally given 1-14C-ascorbic acid was studied under conditions of marginal and abundant vitamin C supply and under intentional stress. There were large differences in the mode of14C excretion between low and high ascorbate supply. The differences were smaller between stress/no stress conditions intraindividually than between the two species, but they were in the same manner. In comparable trials S. fuscicollis reacted such that a higher status of stress can be supposed in this species.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02021558
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  • 6
    Electronic Resource
    Electronic Resource
    Bruterfolg, Siedlungsdichte und Raumnutzung der Elster (Pica pica) in unterschiedlichen Habitaten (1992)
    Springer
    Journal of ornithology 133 (1992), S. 389-402 
    Details
    ISSN: 1439-0361
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Description / Table of Contents: Summary The influence of several factors on breeding success, nesting behaviour, density and selection of nesting sites was investigated on a study plot of 128 km2 in northeastern Bavaria (Bayreuth, Oberfranken). The position to human settlement is the most important factor: Magpies within settlements showed a higher breeding success and density than outside (Tab. 5); the habitat (rural, urban, outskirts) was less important. Potential predators (GoshawkAccipiter gentilis, Carrion CrowCorvus corone corone) had no effect, Probably because of its low densities. The relation to colonies of the Fieldfare (Turdus pilaris) is interpreted as a common use of grassland as feeding site during the breeding season (Tab. 5). Magpies seem to avoid the vicinity of forests (Tab. 4). The altitude had only a slight effect on breeding success and nesting behaviour. Among several factors which refer to the nesting site (tree type, height, exposition, period of leaf break, nest type) only the nest age had a clear (positive) effect on breeding success. Magpies preferred higher trees for nest-building (Tab. 4). The influence of other factors (density of nest sites, hunting, character of trees) and the relation between the different factors are discussed.
    Notes: Zusammenfassung Auf einer Fläche von 128 km2 im Raum Rayreuth (Oberfranken) wurde der Einfluß verschiedener Faktoren auf Bruterfolg, Nestbau, Siedlungsdichte und Nistplatzwahl der Elster durch multivariable statistische Methoden geprüft. Größte Bedeutung kam der Lage zur Siedlung zu: Elstern innerhalb von Siedlungen hatten einen vergleichsweise höheren Bruterfolg und eine höhere Siedlungsdichte. Das Habitat (Stadt, Stadtrand, Land) spielte demgegenüber eine geringere Rolle. Ein Einfluß potentieller Feinde (Rabenkrähe, Habicht) war (vermutlich wegen zu geringer Dichte) nicht erkennbar. Die mögliche Beziehung zur Wacholderdrossel wird als gemeinsame Nutzung von Grünland als wichtigste Nahrungsquelle diskutiert. Waldrandnahe Standorte wurden gemieden. Die Höhenlage hatte nur einen geringen Einfluß auf Bruterfolg und Nestbauverhalten. Von verschiedenen das Nest betreffenden Parametern (Baumtyp, Baumhöhe, Exposition, Blattaustrieb, Nestausbau, Nestalter) hatte nur das Nestalter einen deutlichen positiven Effekt auf den Bruterfolg. Bei der Wahl eines Nistplatzes war die Baumhöhe die einzig erkennbare wichtige Größe: Elstern nutzten höhere Bäume als dem durchschnittlichen Angebot entsprach. Die Bedeutung anderer Faktoren (Nistplatzangebot, Jagd) und die Beziehung zwischen den verschiedenen Parametern wird diskutiert.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01640467
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  • 7
    Electronic Resource
    Electronic Resource
    Pulmonary aspergillus intracavitary colonization (PAIC) (1990)
    Springer
    Mycopathologia 112 (1990), S. 93-104 
    Details
    ISSN: 1573-0832
    Keywords: Aspergillus ; fungal elements
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Abstract We have attempted to elucidate the natural history of pulmonary aspergillus intracavitary colonization (PAIC) based on more than 350 cases of the disease observed in the last 11 years and on data collected from the literature. The data indicate that PAIC is a dynamic process consequent to the continual growth and death of fungal elements and also with their relationships to the anatomic features of the cavity (valvular mechanisms, vascular alteration). The clinical presentations reflect immunological changes in the host. Metabolites produced by the species of Aspergillus involved affect the clinical presentation of the syndrome.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00436504
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  • 8
    Electronic Resource
    Electronic Resource
    Small angle neutron scattering from oxygen precipitates in silicon (1992)
    Springer
    Applied physics 54 (1992), S. 19-21 
    Details
    ISSN: 1432-0630
    Keywords: 61.12Dw ; 72.10 ; 78.50G
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Abstract The formation of silicon oxide precipitates from Czochralski grown silicon depends on the time and temperature of the heat treatment as well as on the initial content of interstitially dissolved oxygen. Samples containing between 5×1017 Oi/cm3 and 13×1017 Oi/cm3 have been heated at 750° C for 96 h. SiO2 precipitates of various shape and size have been obtained and investigated by means of small angle neutron scattering (SANS) in the Q-range 0.05 Å−1〈Q〈0.2 Å−1. The obtained SANS patterns reveal a typical anisotropy of their intensity distribution, which splits into a central peak at Q〈0.1 Å−1 due to the shape of the individual particles and a number of weak intensities for large Q-values, originating from a correlation between defects, possibly between the precipitates. While these correlation peaks in the SANS patterns are seen best for rather low values of about (5–7)×1017 Oi/cm3 oxygen content, the central peak anisotropy is most pronounced for higher values of ca 10×1017 Oi/cm3. The integrated intensity of the central peak increases with increasing initial oxygen content. For comparison, untreated samples of the same initial oxygen content do not reveal any anisotropic SAN scattering or a broadened central peak beam.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00348123
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  • 9
    Electronic Resource
    Electronic Resource
    The generalized doubling construction and formal concept analysis (1994)
    Springer
    Algebra universalis 32 (1994), S. 341-367 
    Details
    ISSN: 1420-8911
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mathematics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01235175
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  • 10
    Electronic Resource
    Electronic Resource
    The effect of the environment on the permeability and composition of Citrus leaf cuticles (1990)
    Springer
    Planta 180 (1990), S. 147-153 
    Details
    ISSN: 1432-2048
    Keywords: Citrus ; Cuticle (composition, permeability) ; Humidity and cuticle permeability ; Temperature and cuticle permeability ; Wax (cuticle)
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract The water permeabilities of 3174 astomatous, isolated cuticular membranes from Citrus aurantium L. leaves were studied. Trees were grown in environmental chambers at temperatures ranging from 15 to 35° C and humidities of 50% and 90%. Photosynthetically active radiation was 500–1000 μmol photons·m−2· s−1. The different growing conditions had no effect on the water permeability of the membranes. However, storing isolated cuticular membranes at 8° C for up to 112 weeks decreased their water permeability, and it is argued that this is a consequence of the healing of defects between wax crystallites, and also indicates the dynamic nature of cuticular waxes.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00193989
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