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  • 2015-2019  (188)
  • 1990-1994  (50)
  • 1975-1979  (19)
  • 1950-1954  (8)
  • 1910-1914  (1)
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Year
  • 11
    Electronic Resource
    Electronic Resource
    Elastic scattering of α-particles on10B forE α = 5−50 MeV (1976)
    Springer
    The European physical journal 279 (1976), S. 163-168 
    Details
    ISSN: 1434-601X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Experimental data of the elastic scattering ofα-particles on10B forE α = 30−50.6 MeV are presented. They are analysed together with the data of a previous measurement forE α = 5−30 MeV in the frame of the optical model including spin-orbit coupling. The interaction radii of theα-10B-systems are determined with the Inopin-Ericson model forE α = 5−50 MeV. The mean free path ofα-particles in10B is calculated.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01437873
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  • 12
    Electronic Resource
    Electronic Resource
    Über einen ungewöhnlichen Saponit von Raschau i. Sa. (1950)
    Springer
    Contributions to mineralogy and petrology 2 (1950), S. 279-290 
    Details
    ISSN: 1432-0967
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01098088
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  • 13
    Electronic Resource
    Electronic Resource
    Die Tonsteine aus den Steinkohlenflözen von Dobrilugk und ihre Entstehung (1951)
    Springer
    Contributions to mineralogy and petrology 2 (1951), S. 413-427 
    Details
    ISSN: 1432-0967
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences
    Notes: Zusammenfassung Es werden Tonsteine beschrieben, die als „biochemische” Sedimente im Steinkohlenmoor gebildet wurden. Die bisherige Deutung, solche Tonsteine seien ehemalige vulkanische Aschentuffe, wird als zur Zeit petrographisch unbegründet abgelehnt.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01083630
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  • 14
    Electronic Resource
    Electronic Resource
    Die Diorite von Dessau (1952)
    Springer
    Contributions to mineralogy and petrology 3 (1952), S. 77-96 
    Details
    ISSN: 1432-0967
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences
    Notes: Zusammenfassung Petrographische und chemische Untersuchungen an Dioriten und Graniten des Kyffhäuser und von Dessau lassen eine Ichor-Metamorphose, d. h. eine Alkali-Metasomatose von den Porenräumen aus, erkennen. In den metamorph-metablastischen Granitabkömmlingen wird die Ichor-Metamorphose deutlich an einer Glomeroblastenbildung und einer erneuten körnigen Texturentwicklung. Diese beweist eine Zufuhr von Albitmolekül. Sie wird in dem metamorph-metablastischen dioritischen Gestein neben der Verdrängung der primären Plagioklase aus der Alkalisierung und Enteisenung der Hornblende ersichtlich. Die magmatischen Ausgangsgesteine: Diorit, Quarzdiorit, Biotitdiorit, Gabbrodiorit (?) und Hornblendegabbro zeigen neben der Alkalisierung eine Muskovitisierung der basischen Plagioklase und eine Biotitisierung der Hornblende, woraus eine Zufuhr an Kali hervorgeht. Diese Stadien der Metamorphose durchlaufen den tektonischen Raum von der Grenze metamorph-nichtmetamorph bis hinab zur Grenze metamorph-magmatisch (Erdmannsdörffer) und rind in der Mitteldeutschen Schwelle zuerst aus dem tiefsten Stockwerk, im Südwesten im Odenwald-Spessart (Erdmannsdörffer) und nunmehr auch aus ihrer äußersten Haube erkannt worden, wo die Schwelle unter die Phyllithülle hinabtaucht.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01130079
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  • 15
    Electronic Resource
    Electronic Resource
    Molecular cloning and analysis of the nuclear gene MRP-L6 coding for a putative mitochondrial ribosomal protein from Saccharomyces cerevisiae (1993)
    Springer
    Current genetics 24 (1993), S. 136-140 
    Details
    ISSN: 1432-0983
    Keywords: Mitochondria ; Ribosomal protein ; Nuclear gene ; pet mutant ; yeast
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract The Saccharomyces cerevisiae nuclear gene MRP-L6 was cloned by complementation of the respiratory-deficient mutant pet-ts 2523 with a library of wildtype yeast genomic DNA. The isolated gene was part of a 3.8-kb sequenced DNA fragment containing, in addition to MRP-L6, two unassigned reading frames, ORF1 and ORF2. MRP-L6 codes for a basic protein of 205 amino acids and a molecular mass of 22.8 kDa. The protein exhibits significant sequence similarity to the ribosomal protein L6 of bacteria and chloroplasts. Unlike the corresponding bacterial proteins, however, the MRP-L6 protein (MRP-L6p) contains at its N-terminus a 16 amino-acid leader sequence exhibiting the known characteristics of mitochondrial import signals. Disruption of MRP-L6 leads to the phenotype of a mitochondrial translation-defective, rho-negative yeast mutant. The results are consistent with MRP-L6p representing an essential component of yeast mitochondrial ribosomes. Expression of MRP-L6 was examined, under conditions of glucose repression and derepression, in wild-type cells and in a series of catabolite repression-defective yeast mutants. In most cases, a distinct though small influence of the carbon source on the expression of an MRP-L6/lacZ reporter construct was observed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00324677
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  • 16
    Electronic Resource
    Electronic Resource
    Über den Nachweis von echtem Leverrierit in Tonsteinen aus unterkarbonischen Steinkohlenflözen von Dobrilugk (1950)
    Springer
    Contributions to mineralogy and petrology 2 (1950), S. 269-278 
    Details
    ISSN: 1432-0967
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences
    Notes: Zusammenfassung Die Existenz des Leverrierit als selbständiges Mineral wird mineralogisch (A. Schüller) und chemisch (H. Grassmann) nachgewiesen. Zusammenfassend seien die Eigenschaften des Leverrierit und des mit ihm verwechselten Kaolinit gegenübergestellt (Tabelle 4).
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01098087
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  • 17
    Electronic Resource
    Electronic Resource
    Eine natürliche Mineralsynthese von Montmorillonit im Nephelinbasalt des Großen Dolmar bei Meiningen (Rhön). (1953)
    Springer
    Contributions to mineralogy and petrology 3 (1953), S. 472-494 
    Details
    ISSN: 1432-0967
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01129199
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  • 18
    Electronic Resource
    Electronic Resource
    Structure and regulation of the isocitrate lyase gene ICL1 from the yeast Saccharomyces cerevisiae (1993)
    Springer
    Current genetics 23 (1993), S. 375-381 
    Details
    ISSN: 1432-0983
    Keywords: Saccharomyces cerevisiae ; Isocitrate lyase ; Gene regulation ; Ethanol induction
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract The ICL1 gene encoding the isocitrate lyase from Saccharomyces cerevisiae was cloned and sequenced. A reading frame of 557 amino acids showing significant similarity to isocitrate lyases from seven other species could be identified. Construction of icl1 null mutants led to growth defects on C2 carbon sources while utilization of sugars or C3 substrates remained unaffected. Using an ICL1-lacZ fusion integrated at the ICL1 locus, a more than 200-fold induction of β-galactosidase activity was observed after growth on ethanol when compared with glucose-repressed conditions. A preliminary analysis of the ICL1 upstream region identified a 364-bp fragment necessary and sufficient for this regulatory phenotype. Sequence motifs also present in the upstream regions of co-regulated genes were found within this region.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00312621
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  • 19
    Electronic Resource
    Electronic Resource
    Identification of UAS elements and binding proteins necessary for derepression of Saccharomyces cerevisiae fructose-1,6-bisphosphatase (1992)
    Springer
    Current genetics 22 (1992), S. 363-370 
    Details
    ISSN: 1432-0983
    Keywords: Saccharomyces cerevisiae ; Fructose-1,6-bisphosphatase ; Glucose repression ; Gene activation ; Gluconeogenesis
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary Fructose-1,6-bisphosphatase is a key enzyme in gluconeogenesis and the FBP1 gene is not transcribed during growth with glucose. Genetic analysis indicated a positive regulation of FBP1 expression after exhaustion of glucose. By linker-deletion analysis, two upstream activation sites (UAS1 and UAS2) were localized and the respective UAS-binding factors (DAP I and DAP II for derepression activating protein) were identified by gel retardation. UAS1 and UAS2 span about 30 bp each, and are separated by approximately 30 bp. Both UAS sites act synergistically. Although UAS1 showed some similarities to the DNA-binding consensus for the general yeast activator Rap1, competition experiments and DEAE-chromatography proved that DAP I and Rap1 correspond to different proteins. Gel retardation by DAP I depended on carbon sources and did not occur in cells growing logarithmically with glucose, whereas a strong retardation signal was obtained with ethanol-grown cells. The present results suggest that DAP I and DAP II are the final regulatory elements for glucose derepression.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00352437
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  • 20
    Electronic Resource
    Electronic Resource
    Effects of microstructure on optimum heat treatment conditions in metal-matrix composites (1991)
    Springer
    Journal of materials science 26 (1991), S. 3287-3291 
    Details
    ISSN: 1573-4803
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract It is well known that the microstructure of metal-matrix composite materials is significantly different from that of the unreinforced matrix. Heat treatments which optimized strength values in the matrix therefore, no longer do so in the composite. It is thus beneficial to find these variations in the heat treatment process, and to pinpoint the microstructural mechanisms responsible. It is known that, in addition to a higher dislocation density, the composite also has a very fine grain size and many whisker interfacial nucleation sites. This study has found that the time required for solutionizing appears to be much shorter in the composite primarily due to the very small grain size. It was also observed that artificial ageing was not very effective in the composite since the precipitates nucleated and grew on the whisker interfaces, therefore, only natural ageing was necessary to achieve peak tensile and yield strengths.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01124675
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