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  • Articles: DFG German National Licenses  (6)
  • 1995-1999  (4)
  • 1980-1984
  • 1955-1959  (2)
  • 1998  (4)
  • 1958  (2)
Source
  • Articles: DFG German National Licenses  (6)
Material
Years
  • 1995-1999  (4)
  • 1980-1984
  • 1955-1959  (2)
Year
Keywords
  • 1
    Electronic Resource
    Electronic Resource
    Beam formation at the Munich atomic beam source : Proceedings of the 7th international conference on ion sources (1998)
    [S.l.] : American Institute of Physics (AIP)
    Review of Scientific Instruments 69 (1998), S. 750-752 
    Details
    ISSN: 1089-7623
    Source: AIP Digital Archive
    Topics: Physics , Electrical Engineering, Measurement and Control Technology
    Notes: A Stern–Gerlach atomic-beam ion source (ABS) with an electron cyclotron resonance (ECR) ionizer and a Cs gas target as charge exchange units will replace the Munich Lamb–Shift polarized hydrogen source. The goal is to achieve intense negative beams of polarized H− and D− of high brightness for injection into the 14 MV MP tandem accelerator and beam intensity of about 2 μA on the target. At the entrance of the ECR ionizer the observed intensity of the neutral beam of polarized atoms is 6.4±0.4×1016 H/s, equivalent to 10 particle/mA before ionization. Comparing beam transport calculations with beam intensity measurements under various conditions allows a consistent description of the beam formation in the ABS with respect to the degree of dissociation ((similar, equals)80%), peaking ((similar, equals)1.6), beam absorption ((similar, equals)40%), and pumping speeds to be made. © 1998 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1148565
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Konstitutionsaufklärung und Synthese von Psilocybin (1958)
    Springer
    Cellular and molecular life sciences 14 (1958), S. 397-399 
    Details
    ISSN: 1420-9071
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary The structure of Psilocybin, the psychotropic active principle of the Mexican mushroomPsilocybe mexicana Heim, has been elucidated. Psilocybin is the phosphoric acid ester of 4-hydroxy-dimethyltryptamine. This structure was confirmed by total synthesis.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02160424
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Psilocybin, ein psychotroper Wirkstoff aus dem mexikanischen RauschpilzPsilocybe mexicana Heim (1958)
    Springer
    Cellular and molecular life sciences 14 (1958), S. 107-109 
    Details
    ISSN: 1420-9071
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary The active principle ofPsilocybe mexicana Heim, a mexican mushroom with hallucinogenic properties, has been isolated in crystalline form. The compound has been given the namePsilocybin; it possesses indole characteristics and contains phosphorus. A second substance, closely related toPsilocybin but found only in traces, has been calledPsilocin.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02159243
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    Paper (German National Licenses)
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  • 4
    Electronic Resource
    Electronic Resource
    In-situ and ex-situ examination of the early stages of chemical vapor deposition (1998)
    Springer
    Fresenius' journal of analytical chemistry 361 (1998), S. 645-646 
    Details
    ISSN: 1432-1130
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract A cold working steel was coated both with high temperature CVD (TiN) and moderate temperature CVD (Ti[C,N]). AES depth profiles show a significant difference at the interface, where a thin oxide layer remains detectable at deposition temperatures of 750 °C. It could be shown that an impedance signal at a frequency of 13 MHz is well suited to detect the early stages of the growth of a CVD coating.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s002160050978
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    Paper (German National Licenses)
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  • 5
    Electronic Resource
    Electronic Resource
    Petrology of mafic lavas within the Onega plateau, central Karelia: evidence for 2.0 Ga plume-related continental crustal growth in the Baltic Shield (1998)
    Springer
    Contributions to mineralogy and petrology 130 (1998), S. 134-153 
    Details
    ISSN: 1432-0967
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences
    Notes: Abstract The Onega plateau constitutes part of a vast continental flood basalt province in the SE Baltic Shield. It consists of Jatulian-Ludikovian submarine volcanic, volcaniclastic and sedimentary sequences attaining in places 4.5 km in thickness. The parental magmas of the lavas contained ∼10% MgO and were derived from melts generated in the garnet stability field at depths 80–100 km. The Sm-Nd mineral and Pb-Pb whole-rock isochron ages of 1975 ± 24 and 1980 ± 57 Ma for the upper part of the plateau and a SHRIMP U-Pb zircon age of 1976 ± 9 Ma for its lower part imply the formation of the entire sequence within a short time span. These ages coincide with those of picrites in the Pechenga-Imandra belt (the Kola Peninsula) and komatiites and basalts in the Karasjok-Kittilä belt (Norway and Finnmark). Together with lithostratigraphic, chemical and isotope evidence, these ages suggest the derivation of the three provinces from a single large (∼2000 km in diameter) mantle plume. These plume-generated magmas covered ∼600,000 km2 of the Baltic Shield and represent a major contribution of juvenile material to the existing continental crust at 2.0 Ga. The uppermost Onega plateau lavas have high (Nb/Th)N = 1.4–2.4, (Nb/La)N= 1.1–1.3, positive ɛNd(T) of +3.2 and unradiogenic Pb-isotope composition (μ1 = 8.57), comparable with those of modern oceanic plume-derived magmas (oceanic flood basalt and ocean island basalt). These parameters are regarded as source characteristics. The lower sequences have (Nb/Th)N= 0.58–1.2, (Nb/La)N= 0.52–0.88 and ɛNd(T) =−2.6. They have experienced mixing with 10–30% of continental crust and resemble contaminated lavas from other continental flood basalt provinces. The estimated Nb/U ratios of 53 ± 4 in the uncontaminated rocks are similar to those found in the modern mantle (∼47) suggesting that by 2.0 Ga a volume of continental crust similar to the present-day value already existed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s004100050355
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    Paper (German National Licenses)
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  • 6
    Electronic Resource
    Electronic Resource
    The transcriptional switch between the Drosophila genes Pig-1 and Sgs-4 depends on a SEBP1 binding site within a shared enhancer region (1998)
    Springer
    Molecular genetics and genomics 259 (1998), S. 656-663 
    Details
    ISSN: 1617-4623
    Keywords: Key wordsDrosophila ; Enhancer-promoter interactions ; Pig-1 ; SEBP1 ; Sgs-4
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract The Drosophila genes Pig-1 and Sgs-4 are adjacent and oppositely transcribed genes which share a common enhancer region located in the intergenic region between the two transcription start sites. Both genes are transcribed in the same tissue, the larval salivary gland, but they are expressed at different times, the expression switching from Pig-1 to Sgs-4 expression during development of the third-instar larva. Here we describe partial purification and functional analysis of a DNA-binding protein, secretion enhancer binding protein 1 (SEBP1), from nuclear extracts of whole Drosophila larvae. SEBP1 binds to a single site within the Pig-1/Sgs-4 intergenic region. Point mutations that disrupt this site had no significant effect on activation of the Sgs-4 promoter in constructs lacking the Pig-1 promoter. However, if the Pig-1 promoter was present, the same mutations led to a strong attenuation of Sgs-4 promoter activity, suggesting that binding of SEBP1 is necessary for the Pig-1/Sgs-4 transcriptional switch. The data are consistent with a model in which the SEBP1 binding site acts as a transient silencing element that facilitates the reorganization of promoter-enhancer interactions by disrupting pre-existing interactions, thus enabling stage-specific activators of Sgs-4 to bind to their enhancer target sites.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s004380050860
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    Paper (German National Licenses)
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