LEADER 00000nam  2200373   4500 
001    AAI1441454 
005    20071119110253.5 
008    071119s2007                        spa d 
035    (UMI)AAI1441454 
040    UMI|cUMI 
100 1  Mantilla, Mario I 
245 13 El discurso andino en "Los rios profundos" 
300    107 p 
500    Source: Masters Abstracts International, Volume: 45-04, 
       page: 1761 
500    Adviser: Michael J. Horswell 
502    Thesis (M.A.)--Florida Atlantic University, 2007 
520    Glow discharges (GD) are well known for their application 
       to direct solids elemental analysis of metals and alloys 
       by optical emission spectroscopy (GD-OES). The most 
       successful application of GD-OES has been the analysis of 
       solid materials since the GD provides rapid, direct bulk 
       and depth profiling analysis of solids, metals, powders, 
       polymers, glasses and ceramics. However, solids analysis 
       has typically suffered from the lack of true analytical 
       blanks and the inability to study particulate solids in 
       their native state. An approach for the analysis of solid 
       powdered material entrapped in a sol-gel matrix by radio 
       frequency glow discharge optical emission spectroscopy (rf
       -GD-OES) is described. Using the sol-gel method, 
       analytical blanks were obtained by the use of an undoped 
       sol-gel. Through sol-gel chemistry, entrapment of solid 
       powdered material (i.e., Portland cement and 
       oligonucleotides) in a solid glass matrix is achieved. 
       Slurries of powdered materials were incorporated into the 
       films and analyzed for both metallic and non-metallic 
       elemental components. Rf-GD-OES is capable of easily 
       determining non-metals due to the inert atmosphere. Cast 
       films are analyzed to determine the optimum discharge 
       operating conditions and effects of particle size as well 
       as deposited layer thickness 
520    Even though depth profiling of solid layered surfaces and 
       thin films has been the major area of application for GDs,
       recent trends have focused on the analysis of liquid 
       solutions for elemental species studies. The coupling of 
       particle beam sample introduction and hollow cathode 
       optical emission spectroscopy (PB/HC-OES) was applied for 
       empirical formula determinations of a group of 
       nucleotides. The phosphorous and carbon atomic emission 
       from ribonucleotide compounds was monitored and the 
       analyte element response (P (I) and C (I)) to the glow 
       discharge operation conditions was studied 
520    To further demonstrate the capability of the PB/HC-OES as 
       a liquid chromatography detector for biomolecules, iron 
       containing metalloproteins were separated and determined 
       by PB/HC-OES through monitoring of iron atomic emission. 
       Reversed phase high performance liquid chromatography was 
       used to separate and isolate an iron-protein mixture 
       followed by PB/HC-OES iron specific detection. Parametric 
       optimization for sample introduction, nebulization and 
       hollow cathode source conditions were performed for the 
       analysis of iron-containing metalloproteins 
590    School code: 0119 
590    DDC 
650  4 Literature, Latin American 
650  4 History, Latin American 
650  4 Sociology, Ethnic and Racial Studies 
690    0312 
690    0336 
690    0631 
710 20 Florida Atlantic University 
773 0  |tMasters Abstracts International|g45-04 
856 40 |uhttp://pqdd.sinica.edu.tw/twdaoapp/servlet/