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  • Springer  (160)
  • National Academy of Sciences  (30)
  • 2015-2019  (39)
  • 2010-2014  (61)
  • 1980-1984  (67)
  • 1970-1974  (23)
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Keywords
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Year
  • 1
    Electronic Resource
    Electronic Resource
    Lifetime-measurements of alkali-molecules excited by different laserlines (1970)
    Springer
    The European physical journal 232 (1970), S. 462-472 
    Details
    ISSN: 1434-601X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Absorbing different lines of acw-argon ion laser or a He-Ne-laser the alkali molecules Na2, K2, Rb2 and Cs2 can be pumped into different rotational-vibrational levels of an excited electronic state. The lifetimes of these states have been measured using the phase shift technique at a modulation frequency of 18 Mc/sec. Because of collisions with the always present alkali atoms the excited molecules may undergo collision-induced transitions to other states and their lifetimes are dependent on the atomic pressure. This dependence was measured and the spontaneous lifetimes were obtained by extrapolation against zero pressure. Different collision processes are discussed which compete with the unperturbed fluorescence.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01395677
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  • 2
    Electronic Resource
    Electronic Resource
    Photoproton spectrum from carbon with good energy resolution (1974)
    Springer
    The European physical journal 270 (1974), S. 93-95 
    Details
    ISSN: 1434-601X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The 90° photoproton spectrum from12C has been measured with good energy resolution using bremsstrahlung with maximum energyEγ=31 MeV. A fragmentation of the giant dipole resonance in fine structures with a typical width of 150 to 300 keV is observed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01677439
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  • 3
    Electronic Resource
    Electronic Resource
    Photofission with linearly polarized photons (1982)
    Springer
    The European physical journal 308 (1982), S. 63-71 
    Details
    ISSN: 1434-601X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: 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.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01415850
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  • 4
    Electronic Resource
    Electronic Resource
    Influence of sex on the urinary bilirubin excretion at increased free plasma haemoglobin levels in whole dogs and in isolated normothermic perfused dog kidneys (1971)
    Springer
    Cellular and molecular life sciences 27 (1971), S. 1264-1265 
    Details
    ISSN: 1420-9071
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Résumé Si le taux sanguin en hémoglobine libre dépasse les 50 mg/100 ml, l'excrétion rénale de la bilirubine est fortement augmentée chez le chien, tandis qu'elle reste faible chez la chienne. Les mêmes résultats sont obtenues par perfusion de reins isolés avec du sang hépariné ou défibriné.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02136676
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  • 5
    Electronic Resource
    Electronic Resource
    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
    Keywords: Western Spruce Budworm ; Choristoneura occidentalis ; Glypta fumiferanae ; endoparasitoids ; electrophoresis
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Description / Table of Contents: 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.
    Notes: 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.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00300884
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  • 6
    Electronic Resource
    Electronic Resource
    Pore size and properties of spherical Ca-alginate biocatalysts (1983)
    Springer
    Applied microbiology and biotechnology 18 (1983), S. 86-91 
    Details
    ISSN: 1432-0614
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: 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.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00500829
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  • 7
    Electronic Resource
    Electronic Resource
    Purines and cortisone in lipid mobilization (1970)
    Springer
    Cellular and molecular life sciences 26 (1970), S. 128-129 
    Details
    ISSN: 1420-9071
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Zusammenfassung Purin-Basen, Kaffein und Cortison führen zu einer Vermehrung der Fettsäuren im Rattenserum. Adenin vermindert im Gegensatz zu den anderen Purinen die Lipolyse.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01895532
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  • 8
    Electronic Resource
    Electronic Resource
    Degradation of haemoglobin-14C and urinary excretion of bilirubin-14C by the normothermic perfused isolated dog kidney (1973)
    Springer
    Cellular and molecular life sciences 29 (1973), S. 410-411 
    Details
    ISSN: 1420-9071
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Résumé L'hémoglobine libre du sang, filtrée par les glomérules rénaux et partiellement absorbée par les tubules, est métabolisée par le tissu renal. A l'aide de l'hémoglobine marquée en14C, formée à partir de la glycine-2-14C et de la glycine-1-14C nos résultats prouvent que chez le chien mâle les reins métabolisent l'hémoglobine en bilirubine conjugée et excrètent cette dernière dans les urines.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01926750
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  • 9
    Electronic Resource
    Electronic Resource
    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
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: 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.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00328472
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  • 10
    Electronic Resource
    Electronic Resource
    Copper accumulation in primary biliary cirrhosis (1982)
    Springer
    Histochemistry and cell biology 74 (1982), S. 85-93 
    Details
    ISSN: 1432-119X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: 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.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00495054
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