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  • 32.80.Dz  (1)
  • Analytical Chemistry and Spectroscopy  (1)
  • 1
    Electronic Resource
    Electronic Resource
    The European physical journal 26 (1993), S. 119-125 
    ISSN: 1434-6079
    Keywords: 36.40.+d ; 31.20.Sy ; 32.80.Dz ; 71.10.+x
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Theoretical investigations of size evolutionary patterns for multiply charged anionic metal clusters and solvation of sodium in water clusters are discussed. For Na N Z- clusters, energetic stability and electron decay channels are determined. Formation of a “surface Rydberg-like state” in Na(H2O) N , correlating with calculated and measured ionization potentials, is analyzed.
    Type of Medium: Electronic Resource
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  • 2
    ISSN: 1040-7685
    Keywords: chitosan ; reversed electroosmotic flow ; capillary electrophoresis ; basic drug enantiomers ; proteins ; Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: An enhanced surface coating method was developed for capillary electrophoresis (CE) using the natural polymer chitosan. The cationic property of chitosan at pH below 6.5 created a reversed electroosmotic flow (EOF) in the capillary. The EOF changed significantly with the run buffer pH at values below 4.0, with less pH dependency at values in the pH range of 4.0-5.5. The new coating exhibited good performance reproducibility. The relative standard deviation (RSD) of EOF was 0.77%. The EOF changed an average of 2.4% after 10 h normal use. The EOF started to change significantly after a constant electric field (300 v cm-1) had been applied for 20 h. This capillary with a reversed EOF can be used to reduce the solute-wall interaction problem for separations of basic analytes, for example, separations of positively charged proteins and basic drug enantiomers.
    Additional Material: 5 Ill.
    Type of Medium: Electronic Resource
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