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  • empirical equations  (2)
  • Hypophyseal neural lobe (pars nervosa)  (1)
  • Identification  (1)
  • Springer  (4)
  • American Physical Society
  • 2015-2019
  • 1995-1999  (4)
  • 1998  (4)
Collection
Keywords
Publisher
  • Springer  (4)
  • American Physical Society
Years
  • 2015-2019
  • 1995-1999  (4)
Year
  • 1998  (4)
  • 1
    Electronic Resource
    Electronic Resource
    Identification of phototrophic sulfur bacteria through the analysis of lmwRNA band patterns (1998)
    Springer
    Archives of microbiology 170 (1998), S. 269-278 
    Details
    ISSN: 1432-072X
    Keywords: Key words Phototrophic sulfur bacteria ; Chromatiaceae ; Identification ; lmwRNA ; 5S RNA ; tRNA ; Taxonomic relationships
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Several phototrophic sulfur bacteria were identified preliminarily through the analysis of the low-molecular-weight RNA fraction (lmwRNA) of bacterial cells. This fraction includes the ribosomal 5S RNA and several transfer RNAs. These molecules were separated by high-resolution electrophoresis in polyacrylamide gels, and the resulting band patterns were used as fingerprints for the identification of the organisms. We examined a large number of well-characterized reference strains together with a broad range of purple sulfur bacterial isolates from freshwater and marine environments. A cluster analysis was run using the similarity matrix calculated from the band patterns. Despite the shortcomings of the method, close relatives were clustered together yielding a number of groups consistent with the phylogenetic arrangement established through the analyses of a few available 16S rRNA gene sequences. Thus, the classification obtained gives further support to rearrangement of the group as the analyses of 16S rRNA gene sequences had previously suggested. We conclude that the analysis of lmwRNA band patterns is a rapid and simple tool for grouping and preliminarily identifying new isolates of phototrophic sulfur bacteria.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s002030050642
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  • 2
    Electronic Resource
    Electronic Resource
    Application of Different Group Contribution Models and Empirical Methods to Excess Enthalpies of Ternary Mixtures (1998)
    Springer
    Journal of thermal analysis and calorimetry 52 (1998), S. 799-814 
    Details
    ISSN: 1572-8943
    Keywords: empirical equations ; excess enthalpy ; group contribution ; ternary mixtures
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract Studies were previously made of the excess molar enthalpies, Hm E, at 298.15 K and normal atmospheric pressure of the ternary mixtures (ethyl propanoate or 3-pentanone) + (n-hexane) + (n-decane, n-dodecane or n-tetradecane) and (1-propanol) + (3-pentanone) + (n-hexane, n-heptane, n-octane, 1-hexanol or 1-heptanol). In the present work, experimental values of Hm E were correlated through use of the Cibulka and Nagata equations, and a new correlation equation is proposed. Experimental data were compared with the predictions of the UNIFAC I (version of Tassios), UNIFAC II (version of Larsen) and Nitta-Chao group contribution models. Hm E values were used to test several empirical predictive methods, both symmetric (Kohler, Jacob-Fitzner, Colinet and Knobeloch-Schwartz), and asymmetric (Tsao-Smith, Toop, Scatchard, Hillert and Mathieson-Tynne).
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1010170825253
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  • 3
    Electronic Resource
    Electronic Resource
    Excess Molar Volumes of {x1 Butyl Butanoate +x2 1-Octanol+(1-x1-x2) Octane} at 298.15 K (1998)
    Springer
    Journal of thermal analysis and calorimetry 52 (1998), S. 815-822 
    Details
    ISSN: 1572-8943
    Keywords: butyl butanoate ; empirical equations ; excess volume ; Nitta-Chao model ; ternary mixture
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract Excess molar volumes at 298.15 K of the ternary system {CH3(CH2)2CO2(CH2)3CH3+ CH3(CH2)7OH+CH3(CH2)6CH3} and the binary mixtures {CH3(CH2)2CO2(CH2)3CH3+ CH3(CH2)7OH}, {CH3(CH2)2CO2(CH2)3CH3+CH3 (CH2)6CH3} and {CH3(CH2)7OH+ CH3(CH2)6CH3} were determined using an Anton Paar DMA 60/602 densimeter. All experimental values were compared with the results obtained with empirical expressions for estimation of the ternary properties from the binary data. Variable-degree polynomials were fitted to the results.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1010122909324
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  • 4
    Electronic Resource
    Electronic Resource
    Identification and neuroanatomical distribution of immunoreactivity for mammalian gonadotropin-releasing hormone (mGnRH) in the brain and neural hypophyseal lobe of the toad Bufo arenarum (1998)
    Springer
    Cell & tissue research 293 (1998), S. 419-425 
    Details
    ISSN: 1432-0878
    Keywords: Key words Gonadotropin-releasing hormone ; Brain ; Hypophyseal neural lobe (pars nervosa) ; Reproduction ; Bufo arenarum (Anura)
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Abstract  The presence and distribution of gonadotropin-releasing hormone (GnRH) in sexually mature specimens of Bufo arenarum was studied by reverse phase/high performance liquid chromatography (RP-HPLC) combined with radioimmunoassay and immunocytochemistry. The analysis of brain extracts with RP-HPLC followed by radioimmunoassay with PBL#45 antiserum showed the presence of only one peak with immunoreactivity for GnRH (ir-GnRH) having the chromatographic and immunological characteristics of mammalian GnRH (mGnRH). This peak was further analyzed with two mGnRH-specific antisera, EL-15 and m1076, yielding serial dilution displacement curves parallel to those obtained with the mGnRH synthetic standard. Immunocytochemical results with the monoclonal antibody LRH13 showed the presence of a terminal nerve-septo-preoptic system with neurons and fibers distributed from the olfactory bulb, septal area, and anterior preoptic area toward the hypothalamus and hypophyseal neural lobe. The main group of ir-GnRH fibers and neurons was identified in the anterior preoptic area. These neurons appear to be the origin of fibers that, after surrounding the preoptic recess, border the dorsal surface of the optic chiasma, extend through the infundibulum, traverse the external layer of the median eminence, and end in the pars nervosa.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s004410051133
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