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  • 1
    Electronic Resource
    Electronic Resource
    Mitomycin derivatives. 1. Preparation of mitosane and mitosene compounds and their biological activities (1971)
    s.l. : American Chemical Society
    Journal of medicinal chemistry 14 (1971), S. 103-109 
    Details
    ISSN: 1520-4804
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/jm00284a005
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  • 2
    Electronic Resource
    Electronic Resource
    MACROLIDE RESISTANCE IN STAPHYLOCOCCI (1971)
    Oxford, UK : Blackwell Publishing Ltd
    Annals of the New York Academy of Sciences 182 (1971), S. 0 
    Details
    ISSN: 1749-6632
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Natural Sciences in General
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1749-6632.1971.tb30663.x
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  • 3
    Electronic Resource
    Electronic Resource
    Molecular basis for the genetic code (1982)
    Springer
    Journal of molecular evolution 18 (1982), S. 297-303 
    Details
    ISSN: 1432-1432
    Keywords: Genetic code ; Protein synthesis ; tRNA ; Aminoacyl tRNA synthetase ; Amino acid charging ; Mitochondria ; Hypermodified base ; Rossmann fold
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary It was found by using the CPK molecular model that holes on the complexes of four nucleotides (C4N) on the tRNAs, namely complexes of the anticodon bases with the discriminator base at 4th position of 3′ end, had lock and key relations to the corresponding protein amino acids. Various general features of the universal and mitochondrial genetic codes were easily explained in terms of the C4N model. The recognition mechanism of the tRNA by the aminoacyl-tRNA-synthetase is closely correlated with the formation of the C4N on the Rossmann fold on the synthetase. The meaning of the hypermodification of the tRNA base next to the third anticodon base and other phenomena were also discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01733895
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  • 4
    Electronic Resource
    Electronic Resource
    The Role of anticodon bases and the discriminator nucleotide in the recognition of some E. coli tRNAs by their aminoacyl-tRNA synthetases (1992)
    Springer
    Journal of molecular evolution 35 (1992), S. 436-443 
    Details
    ISSN: 1432-1432
    Keywords: tRNA recognition ; Origin of genetic code ; Origin of life ; Anticodon ; Discriminator base ; Aminoacyl-tRNA-synthetase
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary The T7 polymerase transcription system was used for in vitro synthesis of unmodified versions of the E. coli tRNA mutants that insert asparagine, cysteine, glycine, histidine, and serine. These tRNAs were used to qualitatively explore the role of some anticodon bases and the discriminator nucleotide in the recognition of tRNA by aminoacyl-tRNA synthetases. Coupled with data from earlier studies, these new results essentially complete a survey of all E. coli tRNAs with respect to the involvement of anticodon bases and the discriminator nucleotide in tRNA recognition. It is found that in the vast majority of tRNAs both of these elements are significant components of tRNA identity. This is not universally true, however. Anticodon sequences are unimportant in tRNAser, tRNALeu, and tRNAAla while the discriminator base is inconsequential in tRNAser and tRNAThr. The significance of these results for origin-of-life studies is discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00171822
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  • 5
    Electronic Resource
    Electronic Resource
    Fabrication of Electroluminescent Devices Using Nanocrystalline Oxide Phosphors (2008)
    s.l. ; Stafa-Zurich, Switzerland
    Key engineering materials Vol. 388 (Sept. 2008), p. 123-126 
    Details
    ISSN: 1013-9826
    Source: Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Nanosized Y2O3:Eu3+ crystalline powders with average particle sizes around 100 nm, measured byfield-emission scanning electron microscopy (FE-SEM), have been synthesized by a polymerizedprecursor method using carboxymethyl cellulose (CMC). The nanocrystalline phosphors exhibitintense photoluminescence (PL) and cathodoluminescence (CL) around 612 nm, being attributed tothe 5D0-7F2 transition of Eu3+. Electroluminescence (EL) properties of the nanophosphors in theform of thick films were investigated, and emission of red light with maximum intensity at 612 nm(corresponding to x = 0.57 and y = 0.32 in the CIE chromaticity diagram) was observed under highac field at 1 kHz. The obtained results suggest a possibility that Y2O3:Eu3+ nanopowders can beused as a red-emitting phosphor for EL devices
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/01/57/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.388.123.pdf
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  • 6
    Electronic Resource
    Electronic Resource
    Ion chemistry in the cometary atmosphere (1975)
    Springer
    Astrophysics and space science 36 (1975), S. 353-361 
    Details
    ISSN: 1572-946X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Dirty ice of a second kind (major components, H2O, CO, and N2; minor components less than several percents, NH3, CH4, and other organic substances such as HCN, CH3CN etc.) is assumed for the composition of volatiles in the cometary nucleus. The consistency with the observations of molecular ions and daughter molecules in the cometary atmosphere is argued by taking into account various ion-molecular reactions and dissociative recombinations. There is a satisfactory agreement for the second kind of dirty-ice model, but the presence of large amounts of CH4 and NH3 is found to be rather in contradiction with observational evidence. A velocity of 8 km s−1 for the hydrogen atoms, derived from analysis of the hydrogen Lyman-alpha corona around comets, is found from the dissociative recombination of H3O+, the dominant constituent of cometary ionosphere, in accordance with H3O++e −→OH+H+H.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00645260
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  • 7
    Electronic Resource
    Electronic Resource
    Carbon suboxide and the genetic code (1979)
    Springer
    Astrophysics and space science 62 (1979), S. 509-513 
    Details
    ISSN: 1572-946X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Carbon suboxide (C3O2) polymers formed in the primitive atmosphere would have produced an organic compound ‘soup’ of high concentration on the Earth. Various vestiges of C3O2 are found in the present genetic scheme, which might suggest that the living system had formed from the polymer ‘soup’.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00645484
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  • 8
    Electronic Resource
    Electronic Resource
    Mars, solar wind, and supernova — Implications of the Viking data (1977)
    Springer
    Astrophysics and space science 49 (1977), S. L21 
    Details
    ISSN: 1572-946X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract A scenario for the evolution of the Martian atmosphere consistent with various data of the Viking 1 and 2 and the Mariner 9 has been presented: Mars was formed from Renazzo-type meteorites polluted by the products of supernova explosion. A dense ancient Martian atmosphere has been swept away by the solar wind and the present tenuous atmosphere was supplied recently by the volcanic gas from the Tharsis region, after the occurrence of the magnetic field.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00641999
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  • 9
    Electronic Resource
    Electronic Resource
    Ultraviolet absorbers in the Venus clouds (1977)
    Springer
    Astrophysics and space science 51 (1977), S. 497-499 
    Details
    ISSN: 1572-946X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Some absorption features in the ultraviolet spectrum of Venus observed by the OAO-2 cannot be interpreted in terms of H2SO4. Carbon suboxide polymer has a yellow colour and absorption at 2000 Å. Fine graphite grains have an absorption band at about 2175 Å as is well known in the case of the interstellar extinction curves. A mixture of these substances which is inevitably formed in the Venus atmosphere by photochemical reactions is the best candidate for explaining the Venus absorption features in the ultraviolet.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00644167
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  • 10
    Electronic Resource
    Electronic Resource
    Strong interaction between the ring system and the ionosphere of saturn (1980)
    Springer
    Earth, moon and planets 22 (1980), S. 521-522 
    Details
    ISSN: 1573-0794
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Notes: Abstract An abnormally low electron density in the Saturnian ionosphere observed by the radio occultation experiment of the Pioneer 11 may be explained in terms of the contamination of water in the Saturnian upper atmosphere from its ring system.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00897291
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