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Full-Text Articles in Physical Sciences and Mathematics
Effects Of Radial Thermal Gradients In Hplc, Jennifer Splan
Effects Of Radial Thermal Gradients In Hplc, Jennifer Splan
Honors Theses, 1963-2015
Due to the widespread use of chromatography, improving efficiency in chromatography is continually an area of interest. Researchers have suggested that the method of column temperature control influences efficiency. To insure reproducible retention times, HPLC columns are often thermostated with a water jacket. Under such conditions, however, a radial thermal gradient may arise from the heat produced by friction between the stationary and mobile phases. If the core of the column is allowed to warm up while the walls are kept at a constant temperature, the solute in the core of the column will elute faster than will that at …
The Temperature Dependence Of Ultra Violet Sulfur Dioxide Absorption Cross Sections, Alexis Brunner
The Temperature Dependence Of Ultra Violet Sulfur Dioxide Absorption Cross Sections, Alexis Brunner
Honors Theses, 1963-2015
Atmospheric sulfur dioxide data became available in 1982 during and after the eruption of El Chichon, when the Total Ozone Mapping Spectrometer, TOMS, received increased absorption in the shortest wavelength channels of the instrument. TOMS was designed to map the daily global total ozone field. The increased absorption was later determined to be due to sulfur dioxide because it is a gaseous volcanic substituent that has corresponding absorption to that seen in the TOMS data. Currently there is no way to develop an algorithm that will accurately subtract the effects of sulfur dioxide from the TOMS data in order to …