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  • Springer  (138)
  • Elsevier  (72)
  • American Chemical Society (ACS)
  • American Meteorological Society (AMS)
  • 1990-1994  (119)
  • 1980-1984  (91)
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  • 1
    Digitale Medien
    Digitale Medien
    Photofission with linearly polarized photons (1982)
    Springer
    The European physical journal 308 (1982), S. 63-71 
    Details
    ISSN: 1434-601X
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Notizen: Abstract The formalism for fragment angular distributions in photofission with unpolarized and linearly polarized photons is summarized. First experiments on232Th using linearly polarized bremsstrahlung are described. The results for the analyzing power show for the first time in a model independent way that the low energy photofission can be explained byelectric dipole excitation. The possibilities of this new method are discussed, in particular when using monoenergetic tagged photons, which are available soon at new high duty cycle electron accelerators.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF01415850
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  • 2
    Digitale Medien
    Digitale Medien
    Electrophoretic techniques for detection of Glypta fumiferanae, an endoparasitoid of western spruce budworm (1981)
    Springer
    Entomologia experimentalis et applicata 30 (1981), S. 176-180 
    Details
    ISSN: 1570-7458
    Schlagwort(e): Western Spruce Budworm ; Choristoneura occidentalis ; Glypta fumiferanae ; endoparasitoids ; electrophoresis
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie
    Beschreibung / Inhaltsverzeichnis: Zusammenfassung Raupen von Choristoneura occidentalis ohne und mit dem Endoparasitoiden Glypta fumiferanae (Vier.) (Hymenoptera: Ichneumonidae) wurden elektrophoretisch auf Isoenzymbänder untersucht zum Nachweis des Parasitoiden. Für G. fumiferanae typische Bänder wurden in 4 der untersuchten 15 Enzymen beobachtet. Dies waren Aconitase, Esterase, Leucinaminopeptidase und 6-Phosphoglucose-dehydrogenase. Das Vorkommen dieser Isoenzymbänder ist ein zuverlässiges Zeichen der Parasitierung durch G. fumiferanae. Die Brauchbarkeit der Elektrophorese als Mittel zum Routinenachweis von Parasitoiden wird diskutiert.
    Notizen: Abstract Parasitoid-free western spruce budworms and western spruce budworm larvae containing the endoparasitoid Glypta fumiferanae (Vier.) (Hymenoptera: Ichneumonidae) were assayed electrophoretically to identify isozyme bands diagnostic for the parasitoid. Bands characteristic of G. fumiferanae were observed with 4 of 15 enzymes tested. These were aconitase, esterase, leucine aminopeptidase and 6-phosphoglucose dehydrogenase. Presence of these isozyme bands is a reliable indication of parasitism by G. fumiferanae. The efficiency of electrophoresis as a tool for routine detection of parasitoids is discussed.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00300884
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  • 3
    Digitale Medien
    Digitale Medien
    Persistence of the insecticide dimethoate in three different soils under laboratory conditions (1991)
    Springer
    Bulletin of environmental contamination and toxicology 46 (1991), S. 492-498 
    Details
    ISSN: 1432-0800
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Energietechnik , Medizin
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF01688190
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  • 4
    Digitale Medien
    Digitale Medien
    Testing the Porcupine Plate hypothesis (1994)
    Springer
    Marine geophysical researches 16 (1994), S. 315-323 
    Details
    ISSN: 1573-0581
    Schlagwort(e): North Atlantic ; tectonics ; Charlie-Gibbs fracture zone
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Geologie und Paläontologie , Physik
    Notizen: Abstract The Porcupine Plate, postulated in 1986 to explain difficulties in reconstructing anomalies 21 and 24 in the North Atlantic, is re-examined. Focusing sharply on the spreading segments nearest to Charlie-Gibbs Fracture Zone casts doubt on the Porcupine Plate hypothesis.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF01224748
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  • 5
    Digitale Medien
    Digitale Medien
    Thermal stability of Mo/Si multilayer soft-X-ray mirrors fabricated by electron-beam evaporation (1994)
    Springer
    Applied physics 58 (1994), S. 371-376 
    Details
    ISSN: 1432-0630
    Schlagwort(e): 68.55 ; 68.65 ; 78.65
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Maschinenbau , Physik
    Notizen: Abstract Mo/Si multilayers are fabricated by electron-beam evaporation in UHV at different temperatures (30° C, 150° C, 200° C) during deposition. After completion their thermal stability is tested by baking them at temperatures (T bak) between 200° C and 800° C in steps of 50° C or 100° C. After each baking step the multilayers are characterized by small angle CuKα-X-ray diffraction. Additionally, the normal incidence soft-X-ray reflectivity for wavelengths between 11 nm and 19 nm is determined after baking at 500° C. Furthermore, the layer structure of the multilayers is investigated by means of Rutherford Backscattering Spectroscopy (RBS) and sputter/Auger Electron Spectroscopy (AES) technique. While the reflectivity turns out to be highest for a deposition temperature of 150° C, the thermal stability of the multilayer increases with deposition temperature. The multilayer deposited at 200° C stands even a 20 min 500° C baking without considerable changes in the reflectivity behaviour.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00323612
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  • 6
    Digitale Medien
    Digitale Medien
    Pore size and properties of spherical Ca-alginate biocatalysts (1983)
    Springer
    Applied microbiology and biotechnology 18 (1983), S. 86-91 
    Details
    ISSN: 1432-0614
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie , Werkstoffwissenschaften, Fertigungsverfahren, Fertigung
    Notizen: Summary A method for the production of spherical alginate gels from few μm up to several mm diameter is described. Alginate beads with diameters from 0.5 to 3 mm are used to immobilize microorganisms as biocatalysts. Micro size alginate gels are used as column packing material for inverse steric exclusion chromatography to determine their pore sizes from dextran standards of known molecular weight. The results indicate that alginate gels have pores which are large enough to release catalytic acting enzymes out of the matrix.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00500829
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  • 7
    Digitale Medien
    Digitale Medien
    Chromosomal evolution in serpentes; a comparison of G and C chromosome banding patterns of some colubrid and boid genera (1980)
    Springer
    Chromosoma 79 (1980), S. 53-64 
    Details
    ISSN: 1432-0886
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie , Medizin
    Notizen: Abstract G and C-chromosome banding techniques have been used to compare the structure of the karyotype in a variety of colubrid and boid snakes. The comparison of G-band patterns indicates that while some band sequences have been conserved, either as whole chromosomes or entire arms, there is also evidence of considerable rearrangement especially in the smaller chromosomes. In the colubrid Elaphe subocularis there is also evidence that there has been a relocation of the centromere on chromosome 2 without any accompanying inversion in the sequence of G-bands. Finally, G-banding has facilitated the demonstration of a simple pericentric inversion distinguishing the Z and W chromosomes in Acrantophis dumereli. This represents the first report of differentiated sex chromosomes in a boid snake. The combined banding data thus indicates that snake chromosomes are certainly not lacking in variability. The use of C-banding to detect constitutive heterochromatin has confirmed that in some boids and colubrids macrochromosomes have been derived from microchromosomes by the additions of heterochromatin.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00328472
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  • 8
    Digitale Medien
    Digitale Medien
    Copper accumulation in primary biliary cirrhosis (1982)
    Springer
    Histochemistry and cell biology 74 (1982), S. 85-93 
    Details
    ISSN: 1432-119X
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie , Medizin
    Notizen: Summary Ultrastructural and X-Ray microanalytical aspects of primary biliary cirrhosis were analysed and compared to those of normal liver. Electron microscopic studies showed a significant increase of dense lipofuscin-like granules in PBC compared to the hepatocytes of normal liver (665%). These granules (0.3–2.7 μm in diameter) were formed by the association of primary lysosomes and lipid droplets. X-Ray microanalysis of these structures showed the presence of Calcium, Phosphorus, Potassium, Chlorine, Sulphur, Aluminium and Copper. The coexistence of Sulphur with other mineral elements suggests the occurence of metalloproteins binding these elements. These findings provide evidence that intralysosomal sequestration of mineral elements, especially copper protects the hepatocytes from cytotoxic effects.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00495054
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  • 9
    Digitale Medien
    Digitale Medien
    A new method to measure particle turbulent dispersion using laser doppler anemometer (1984)
    Springer
    Experiments in fluids 2 (1984), S. 89-93 
    Details
    ISSN: 1432-1114
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Maschinenbau
    Notizen: Abstract A laser doppler anemometer (LDA) was used to measure local dispersion coefficients of particles in turbulent flow. The experimental set-up is described along with the data acquisition equipment and processing procedures. Results for 5 μ particles dispersing from a point source in pipe flow are shown. A second estimate for the diffusivity was obtained from mean square dispersion measurements.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00261327
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  • 10
    Digitale Medien
    Digitale Medien
    Ewing's tumor X mouse hybrids expressing the MIC2 antigen: analyses using fluorescence CDD-banding and non-isotopic ISH (1992)
    Springer
    Human genetics 〈Berlin〉 88 (1992), S. 273-278 
    Details
    ISSN: 1432-1203
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie , Medizin
    Notizen: Summary We present a highly sensitive method that has been applied to map the chromosomal origin of the prominent cell surface antigen of Ewing's tumor cells recognized by monoclonal antibody HBA-71. The technique allows an unambiguous identification of human chromosomal material in interspecific cell hybrids. This is achieved by fluorescent in situ hybridization of biotinylated total human DNA, followed by high resolution fluorescence banding with the chromomycin/distamycin/ DAPI triple stain. An advantage of this method is that all signals can be visualized in one single operation by simply switching the appropriate filter blocks. The protocol has proved extremely useful in gene mapping by means of interspecific cell hybrids, a technique that depends on the accurate and unambiguous recognition of the relevant (e.g., human) genetic material in the clonal genome. Our studies confirm that this antigen is the product of the MIC2 gene, which is so far the only well-studied pseudoautosomal gene in man, and which is located on the short arms of chromosomes X and Y. Furthermore, no influence of the Ewing's tumor-specific translocation t(11;22) on MIC2 expression could be discerned.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00197258
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