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  • 2020-2023  (2)
  • 2020-2022  (93)
  • 1990-1994  (101)
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  • 11
    Electronic Resource
    Electronic Resource
    Blends of Nafion and Dow Perfluorosulfonated Ionomer Membranes (1994)
    s.l. : American Chemical Society
    Macromolecules 27 (1994), S. 6750-6754 
    Details
    ISSN: 1520-5835
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology , Physics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/ma00101a012
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  • 12
    Electronic Resource
    Electronic Resource
    Potassium-oxygen interactions on a ruthenium(001) surface (1992)
    s.l. : American Chemical Society
    Langmuir 8 (1992), S. 2461-2472 
    Details
    ISSN: 1520-5827
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/la00046a019
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  • 13
    Electronic Resource
    Electronic Resource
    Resonant optical nonlinearity of fullerenes in free-standing polymethyl methacrylate films (1993)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 74 (1993), S. 3669-3672 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: We have prepared films of polymethyl methacrylate in which fullerenes (a mixture of C60 and C70) are uniformly embedded. By performing both degenerate four-wave mixing experiments and irradiance-dependent transmission measurements with nanosecond laser pulses of 608-nm wavelength, the third-order nonlinear optical susceptibility of these films is determined to be of the order of 10−10 esu. This susceptibility is dominated by its imaginary part. Excited-state absorption is the main mechanism responsible for the observed nonlinear susceptibility.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.354508
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  • 14
    Electronic Resource
    Electronic Resource
    Optimal Investment and Consumption With Two Bonds and Transaction Costs (1991)
    Oxford, UK : Blackwell Publishing Ltd
    Mathematical finance 1 (1991), S. 0 
    Details
    ISSN: 1467-9965
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Mathematics , Economics
    Notes: An agent can invest in a high-yield bond and a low-yield bond, holding either long or short positions in either asset. Any movement of money between these two assets incurs a transaction cost proportional to the size of the transaction. the low-yield bond is liquid in the sense that wealth invested in this bond can be consumed directly without a transaction cost; wealth invested in the high-yield bond can be consumed only by first moving it into the low-yield bond. the problem of optimal consumption and investment on an infinite planning horizon is solved for a class of utility functions larger than the class of power functions.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1467-9965.1991.tb00016.x
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  • 15
    Electronic Resource
    Electronic Resource
    Structure of hexaaquadichloropraseodymium(III) chloride (1991)
    Oxford [u.a.] : International Union of Crystallography (IUCr)
    Acta crystallographica 47 (1991), S. 1074-1075 
    Details
    ISSN: 1600-5759
    Source: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Topics: Chemistry and Pharmacology , Geosciences , Physics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1107/S0108270190011830
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  • 16
    Electronic Resource
    Electronic Resource
    Water-soluble and amphiphilic polymers (1991)
    Springer
    Polymer bulletin 25 (1991), S. 459-466 
    Details
    ISSN: 1436-2449
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Summary Thin filns of PSt/PMAA and PEO-PSt-PEO block polyners were deposited on a polystyrene substrate by solution adsorption (with or without solvent treatnent), and the filn surfaces were characterized by neans of XPS. Direct solvent-casting of PEO-PSt-PEO from benzene solutions resulted in PSt-rich surfaces, whereas PMAA richer surfaces were obtained for PSt/PMAA filns cast from DMF solutions. Moreover, solvent treatment after casting had profound effect on the filn surface conposition. Treatment with water markedly increased the surface concentration of polar PEO segments. In the case of PSt-PMAA block polymers, the PSt content on the surface increased in the order of water〈 ethanol 〈 cyclohexane 〈 petroleum ether, the last-named giving films with almost pure PSt surface. It is well worth noticing that the bulk conposition had little to do with the surface conposition for both PSt/PMAA and PEO-PSt-PEO block polyners within the conposition range investigated when subsequent solvent treatnent was applied.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00310237
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  • 17
    Electronic Resource
    Electronic Resource
    Protein synthesis during germination of heterothallic yeast ascospores (1992)
    Springer
    Cellular and molecular life sciences 48 (1992), S. 786-788 
    Details
    ISSN: 1420-9071
    Keywords: Germination ; yeast ; protein synthesis ; trehalase ; glyceraldehyde-3-phosphate dehydrogenase
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Abstract Protein synthesis during ascospore germination of the heterothallicSaccharomyces cerevisiae strain AP-3 was investigated. Protein synthesis in the germinating ascospores appeared to begin approximately 20 min following glucose initiation. Since RNA synthesis did not start until approximately 70 min after the onset of germination, strain AP-3 ascospores must contain RNA which is ready for immediate translation. Both trehalase and glyceraldehyde-3-phosphate dehydrogenase activities were found to be affected by the onset of germination. Trehalase activity was found to increase severalfold following 60 min of spore germination but remained relatively constant over the subsequent 120 min examined. Dehydrogenase activity was not detectable in AP-3 ascospores but was measurable in germinating ascospores.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02124304
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  • 18
    Electronic Resource
    Electronic Resource
    Characterization of dihydropyrimidinase from Pseudomonas stutzeri (1994)
    Springer
    Archives of microbiology 161 (1994), S. 70-74 
    Details
    ISSN: 1432-072X
    Keywords: Key words: Dihydropyrimidinase – Purification – Dihydropyrimidine – Hydantoin –Pseudomonas stutzeri
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract. Dihydropyrimidinase from Pseudomonas stutzeri ATCC 17588 was purified 100-fold and characterized. It was found that dihydrouracil, dihydrothymine and hydantoin could serve as substrates for the partially purified enzyme. The K m values for dihydrouracil, dihydrothymine and hydantoin were determined to be 19.6 µM, 21.3 µM and 36.4 µM, respectively, while their respective V max values were 0.836 µmol/min, 0.666 µmol/min and 2.21 µmol/min. Between pH 7.5 and 9.0, enzyme activity was shown to be maximal. The optimum temperature for enzyme activity was 45 °C. Using gel filtration, the molecular weight of the enzyme was calculated to be approximately 115 000 Da. Metal ions were found to influence the level of enzyme activity. Dihydropyrimidinase activity was stimulated by magnesium ions and inhibited by either zinc or copper ions.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00248895
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  • 19
    Electronic Resource
    Electronic Resource
    RFLP mapping of partially sequenced leaf cDNA clones in maize (1994)
    Springer
    Theoretical and applied genetics 88 (1994), S. 717-721 
    Details
    ISSN: 1432-2242
    Keywords: Maize ; Linkage map ; Sequence tagged sites ; Expressed sequence tags
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract We report here the results of mapping a set of 92 leaf cDNA clones in maize. The ends of each of these cDNA clones have previously been partially sequenced, and the sequence comparison has revealed the putative function for 28 clones. It is expected that the RFLP map developed using these expressed sequence tags will be of great importance for future maize genome analysis, such as for PCR-based gene mapping or gene function identification.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01253975
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  • 20
    Electronic Resource
    Electronic Resource
    A low-copy-number Sorghum DNA sequence that detects hypervariable EcoRV fragments (1994)
    Springer
    Theoretical and applied genetics 89 (1994), S. 64-69 
    Details
    ISSN: 1432-2242
    Keywords: Hybridization probe ; Sorghum bicolor ; Fingerprinting
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract A sorghum genomic DNA clone that hybridized on Southern blots in simple but different patterns to fragments produced by digestion of DNA from the parents of an F2 mapping population was hybridized to EcoRV-digested DNA from 53 accessions. Forty-six different fragment patterns were observed, each comprised of from one to ten bands. Much less variability was detected in EcoRI than EcoRV digests of a selected subset of the accessions. Base-sequence analysis of the clone did not reveal a functional identity for the sequence and the clone does not contain repeated sequences often associated with hypervariable loci. Clones such as this will be especially useful in evaluating germplasm diversity and in identifying the potential parentage of hybrids.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00226984
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