Thesis (M.S.)--Northern Michigan University, 2009. / Bibliography: leaves 56-66.

Thesis (M. Phil.)--University of Hong Kong, 1978. / Typewritten.

published_or_final_version / Zoology / Master / Master of Philosophy

The competition between two molecules of similar polarity for adsorption sites on the stationary phase is discussed in light of rapid kinetics of adsorption and desorption, and of the effects of temperature, acetonitrile, surfactant (cyclohexylaminopropane sulfonic acid, CAPS) and salt concentrations on the retention of the thyroid hormones (3,5-diiodothyronine, T2; 3,3',5-triiodothyronine, T3 and thyroxine, T4). A three parameter equation relates the surfactant concentration and ionic strength to the retention of the hormones and is analyzed in terms of the Stern-Gouy-Chapman theory. A second order polynomial describes the temperature dependency and permits the evaluation of the enthalpy, entropy and heat capacity, demonstrating a reduction in the molecular motion of the analyte with increasing surfactant and acetonitrile concentrations. The equation parameters for linear or non-linear equations, using data sets with or without homogeneous variances, are evaluated using a Simplex optimization procedure that uses one of two proposed optimization criteria. The construction and operation of a computer based gradient programmer for HPLC is described. A surfactant mediated gradient elution with electrochemical detection is examined for the analysis of serum thyroid hormones.

Thesis (M.S.)--Duquesne University, 2003. / Title from document title page. Abstract included in electronic submission form. Includes bibliographical references (p. 59-61) and abstract.

Thesis (Ph. D.)--University of Wisconsin--Madison, 1956. / Typescript. Vita. eContent provider-neutral record in process. Description based on print version record. Includes bibliographies: leaves 69-73, 98.

Thesis (Ph.D.)--University of Delaware, 2009. / Principal faculty advisor: John T. Koh, Dept. of Chemistry & Biochemistry. Includes bibliographical references.

Thesis (doctoral)--Karolinska Institutet, Stockholm, 1984. / Extra t.p. with thesis statement inserted. Bibliography: p. 30-40.

Thesis (Ph. D.)--University of Wisconsin--Madison, 1962. / Typescript. Vita. eContent provider-neutral record in process. Description based on print version record. Includes bibliographical references.

Thesis (Ph. D.)--University of Delaware, 2006. / Principal faculty advisor: John T. Koh, Dept. of Chemistry and Biochemistry. Includes bibliographical references.