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  • Articles  (58)
  • Springer  (45)
  • Wiley  (10)
  • Wiley-Blackwell  (2)
  • Springer Nature  (1)
  • American Physical Society (APS)
  • 2020-2022
  • 2015-2019
  • 2005-2009
  • 1995-1999
  • 1990-1994  (43)
  • 1985-1989  (8)
  • 1975-1979  (7)
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  • 2014
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  • 1993  (19)
  • 1992  (10)
  • 1988  (8)
  • 1979  (7)
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  • Articles  (58)
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  • 2020-2022
  • 2015-2019
  • 2005-2009
  • 1995-1999
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  • 1
    Electronic Resource
    Electronic Resource
    ΔJ=1 band structures on ns-isomeric states in odd mass117, 119, 121Te nuclei (1979)
    Springer
    The European physical journal 290 (1979), S. 399-406 
    Details
    ISSN: 1434-601X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract In117Te,119Te and121Te isomeric states withJ π=5/2+, 5/2+ and 7/2+ and half-lives of 19.1(9)ns, 2.2(2) ns and 86(6) ns, respectively, have been identified at low excitation energies using (α, 2n) reactions on enriched115–119Sn targets. Positive parityΔJ=1 bands built on these isomeric states have been observed up to 17/2+. The states are interpreted as members of rotational bands built on deformation driving 5/2+ [402] and 7/2+ [404] Nilsson orbitals which overcome theN=64 subshell gap. The irregular level spacings and electromagnetic properties of the bands are well explained in Coriolis calculations. The moment of inertia parameter as function of collective angular momentum has been derived from the doubly even Te cores. The hindrance of the band head deexcitation may be caused by shape fluctuations of these transitional nuclei.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01408403
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  • 2
    Electronic Resource
    Electronic Resource
    Core-particle coupling and polarization effects (1979)
    Springer
    The European physical journal 293 (1979), S. 31-42 
    Details
    ISSN: 1434-601X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The unpaired particle in an odd-mass transitional nucleus exerts forces on the rest of the system leading to an effective shape which is in general dependent on thej-orbital occupied by the extra particle. To account for this polarization effect we propose to modify the collective matrix elements by a phenomenological polarization factor. This enables us to describe also such band structures by the core-particle coupling model for which the common coupling rules seem to fail. Selecting a typical case the model is applied to123I in order to demonstrate the important role of the polarization. The calculation reproduces fairly well all band structures including theirM1 andE2 decay properties.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01414782
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  • 3
    Electronic Resource
    Electronic Resource
    Comparison of the particle flow in $$q\bar q\gamma $$ and $$q\bar qg$$ events frome + e − annihilations at PETRA (1988)
    Springer
    The European physical journal 39 (1988), S. 1-6 
    Details
    ISSN: 1434-6052
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The particle flow distributions in the event plane of 3-jet $$(e^ + e^ - \to q\bar qg)$$ and of radiative 2-jet $$(e^ + e^ - \to q\bar q\gamma )$$ events are compared at a centre of mass energy of 35 GeV. The number of particles in the angular region opposite to the gluon in $$q\bar qg$$ events is found to be significantly reduced relative to the number of particles in the region opposite to the hard photon in $$q\bar q\gamma $$ events. This depletion is expected from the “string effect” observed in 3-jet events. It can be explained within the framework of QCD as arising from soft gluon interference.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01560384
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  • 4
    Electronic Resource
    Electronic Resource
    Comparative transcription analysis of higher plant plastome mutants (1988)
    Springer
    Current genetics 14 (1988), S. 171-176 
    Details
    ISSN: 1432-0983
    Keywords: Pelargonium ; Plastome mutants ; Plastid RNA ; Northern analysis
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary Several plastome mutants ofPelargonium zonale hort. are characterized by either plastid ribosome deficiencies of specific defects in their photosystems. Southern analyses of plastid DNA fragments containing both the rDNA region and therbcL gene revealed no differences between wild-type and mutant leaves. Northern analyses of mutants with plastid ribosome deficiencies indicate lower levels of plastid ribosomal RNA and mRNA coding for the large subunit (LS) of ribulose-1,5-bisphosphate carboxylase/oxygenase (Rubisco) in mutant leaves relative to green leaves. The data presented in this paper indicate a defect at the transcriptional level in the plastid ribosome deficient plants. We suggest that a RNA polymerase defect affects transcriptional efficiency in these mutants.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00569341
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  • 5
    Electronic Resource
    Electronic Resource
    A concrete ideal multiplication for algebraic systems and its relation to congruence distributivity (1979)
    Springer
    Archiv der Mathematik 32 (1979), S. 234-245 
    Details
    ISSN: 1420-8938
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mathematics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01238496
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  • 6
    Electronic Resource
    Electronic Resource
    Repetitive sequences in the genome ofAnemone blanda: Identification of tandem arrays and of dispersed repeats (1993)
    Springer
    Chromosoma 102 (1993), S. 312-324 
    Details
    ISSN: 1432-0886
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Abstract A tandemly repetitive sequence family (AbS1) and a repetitive sequence (Hd) forming part of a larger dispersed element (dorf-1) ofAnemone blanda were characterised. TheAbS1 satellite sequence family is located in all 4′,6-diamidino-2-phenylindole (DAPI) positive intercalary heterochromatic bands and in the DAPI positive heterochromatic terminal region of chromosome 3, while the dispersedHd homologous sequences are preferentially associated with euchromatic chromosome regions. The major component of theAbS1 satellite isAbS1-H1 with a basic repeat unit of 1640 bp; a minor fraction (AbS1-H5) consists of 320 bp units. A subsection of theAbS1-H1 repeat unit exhibits homologies to the 25S rRNA gene of flowering plants suggesting that the 1.64 kb satellite was generated by amplification of a precursor satellite and/or single copy sequence together with an rDNA fragment. The rDNA homologous region is considered to evolve at a rate similar to pseudogenes and thus the age of this satellite DNA fraction can be roughly estimated as about 27 million years. The dispersed repeated sequenceHd (about 1300 bp) is associated with the 8 kb elementdorf-1. A. blanda dorf-1 constitutes about 0.2% of the genome (3×104 copies), is bounded by identical long terminal repeats, and exhibits partial homology to theLilium gypsy-type elementdell, but has yet to be confirmed as a retrotransposon. In contrast to theAbS1 satellite sequence family,Hd homologous sequences were found not only inA. apennina, the closest relative ofA. blanda, but also inA. nemorosa andA. ranunculoides indicating that a progenitor sequence ofdorf-1 was present in a common ancestor before speciation ocurred.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00661274
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  • 7
    Electronic Resource
    Electronic Resource
    Selection and characterization of mutants of the cyanobacterium Synechocystis sp. PCC 6803 unable to tolerate high salt concentrations (1992)
    Springer
    Archives of microbiology 158 (1992), S. 429-434 
    Details
    ISSN: 1432-072X
    Keywords: Cyanobacteria ; Glucosylglycerol ; Random cartridge mutagenesis ; Salt tolerance
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Three mutants of the cyanobacterium Synechocystis sp. PCC 6803 unable to tolerate high salt concentrations were generated using random cartridge mutagenesis. Analysis of the phenotypes revealed that the salt sensitivity of one mutant (6803/143) is caused by a block in the synthesis of the osmoprotective substance glucosylglycerol, while in the two other mutants no physiological defect could be detected which was responsible for the loss of salt tolerance. Southern hybridization analyses and cloning of the integration sites of the resistance marker demonstrated that different genes are affected in each of the three mutants.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00276304
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  • 8
    Electronic Resource
    Electronic Resource
    Thin-skinned thrust mineralization in the Brasília fold belt: the example of the old Luziânia gold deposit (1992)
    Springer
    Mineralium deposita 27 (1992), S. 293-303 
    Details
    ISSN: 1432-1866
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences
    Notes: Abstract The Luziânia gold deposits in southern Goiás lie within the Late Proterozoic Brasília fold belt. The rocks that host the gold mineralization are a monotonous series of hydrothermally altered phyllites that have been subject to low grade regional metamorphism. The major controls on the gold mineralization are northeast trending and gently northwest dipping ductile-brittle, dextral-reverse shear zones associated with regional thin-skinned thrusting of the Canastra Group. From a preliminary fluid inclusion study it is deduced that low salinity, ⩽ 7 eq. wt% NaCl, moderately dense, H2O-CO2 ± CH4 ore fluids deposited gold at temperatures of 300 ± 75°C and pressures of 1.5 to 3 kb in the filling stage of the vein formation. Post-filling stage gold deposition probably occured by mixing of fluids at higher crustal levels (1.5–2 kb). During thrusting, prograde metamorphism released pore water which penetrated along thrust planes that acted as high permeability zones for the ponding and release, by hydraulic fracturing, of overpressured fluids. Later in the tectonic evolution and at shallower crustal levels, there was likely an incursion of near suface water into the fault zone.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00193400
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  • 9
    Electronic Resource
    Electronic Resource
    Book reviews (1979)
    Springer
    Theoretical and applied genetics 54 (1979), S. 93-96 
    Details
    ISSN: 1432-2242
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00265477
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  • 10
    Electronic Resource
    Electronic Resource
    Tissue- and stage-specific modulation of RNA editing of the psbF and psbL transcript from spinach plastids — a new regulatory mechanism? (1993)
    Springer
    Molecular genetics and genomics 240 (1993), S. 238-244 
    Details
    ISSN: 1617-4623
    Keywords: RNA editing ; Spinach chloroplasts ; Plastid differentiation ; Photosynthesis genes
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract The psbE operon of spinach chloroplasts, which includes the genes psbE, psbF, psbL and psbJ, encodes two RNA editing sites. One site corresponds to the initiation codon of the psbL transcript, as has been described earlier for the homologous transcript from tobacco, while at a second editing site, newly reported here, an internal phenylalanine codon of the psbF transcript is restored. Both these sites were investigated with respect to the extent of editing in spinach plastids at various developmental stages. The apparent existence of only completely edited transcripts in etioplasts and chloroplasts, indicates that light-induced processes are not acting as determinants in eliciting the editing process. Reduced editing is, however, observed in the psbF and psbL transcript from seeds and roots. This finding suggests that the RNA editing process is differentially down-regulated in leucoplasts and proplastids and that editing may, therefore, function as a regulatory device in lastid gene expression.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00277062
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