ABSTRACT
The separation and detection of native polysaccharides in capillary zone electrophoresis is presented. To provide differences in the electrophoretic mobility, a pH of 11.5 is used to partially ionize the analytes. Detection is made possible by indirect fluorescence, where the charged analytes displace the anionic fluorescing buffer ion to create negative peaks. Detection limits in the picogram range are possible.
Subject(s)
Lasers , Polysaccharides/analysis , Amylose/analogs & derivatives , Amylose/analysis , Amylose/isolation & purification , Dextrans/analysis , Dextrans/isolation & purification , Electrophoresis/methods , Hydrogen-Ion Concentration , Microchemistry/methods , Microscopy, Fluorescence/methods , Molecular Weight , Polysaccharides/isolation & purification , Sensitivity and SpecificityABSTRACT
A variety of liquid chromatographic, solution fluorescence, and extraction data were obtained in an attempt to correlate solution interactions with solid-matrix interactions for solute-beta-cyclodextrin complexes. From the chromatographic data, dissociation constants were calculated for the complexes. Fluorescence spectral characteristics were obtained for sodium chloride, glucose, and beta-cyclodextrin solutions of several solutes. In addition, extraction experiments were performed in an attempt to remove the solutes from the beta-cyclodextrin solid matrix. Generally, the results revealed that there were no simple correlations between the solution data and solid-matrix luminescence data. However, the extraction results yielded important information related to the solute interactions in the solid matrix.
ABSTRACT
The urines of 3,270 asymptomatic girls were screened at annual physical examinations. The urines were collected in Dixie Cups without prior preparation of the perineum and cultured on 5% sheep cell agar. Less than 2 per cent of the specimens showed significant growth, thus requiring no follow-up visits by 98 per cent of the patients. Slightly less that 1/2 of one per cent were found to have asymptomatic urinary tract infections. The procedure was found to be practical, economically feasible and reliable, and was well accepted by both the parents and patients.
