Physical Sciences and Mathematics Commons^™

A Study Of A Divalent Cation-Selective Electrode, William Stanhope Ryan Jr.

Master's Theses

The ion-selective membrane electrode, recently introduced commercially, has shown excellent promise as a tool for determining ionic activities and concentrations in solution. It was the intent of the author to study the Orion divalent cation-selective electrode with two objectives.

The first objective of this research was to characterize the response of the divalent cation-selective electrode to calcium and magnesium ions in aqueous solutions. The effect of anions, monovalent cations; and pH upon this response was investigated. An examination was made of the response of this electrode to other divalent cations and of the effect of organic solvents on the membrane …

A Study Of The Acetic Anhydride Method For The Determination Of Citric Acid, Russell Kent Odland

Master's Theses

Citric acid is an important compound of many systems. Numerous methods, both qualitative and quantitative, have been used for the determination of the compound. Some of the biological systems investigated include fermentation studies, action on yeasts, antioxidant in fruits, additive in bakery goods and salad dressing preparations, amounts in vegetables, and others.The above examples are not complete; they only show the varied applications of citric acid. The purpose of this project was to investigate a quantitative spectrophotometric method using anhydrous conditions based on the citric acid-acetic anhydride-pyridine reaction. Conditions affecting the reaction were investigated and optimized for maximum sensitivity and …

Synthesis Of Chromium Tricarbonyl Complexes Of 1,3-Diaryl-2-Propyl Methanesulfonates, Ashby French Johnson

Master's Theses

Various unsymmetrically substituted 1 , 3-dipheny l -2- propylmethanesulfonates were prepared and complexed with chromium hexacarbonyl. The major products obtained from this complexation contained one rr -complexed ring and the other ring substituted with more common groups.

Substituted ℓ-Dialkylaminomethyl-3-Phenyl-1-Naphthalenemethanols, Richard Elroy Davis

Master's Theses

Malaria is still a world health problem. Established antimalarial drugs have become ineffective in many areas because of the emergence of resistant strains of malaria. New efforts have been initiated to study variations of new untried compounds and earlier structures shown to have activity. The 4-quinolinemethanols fall into the latter class. The great activity of the 4-quinolinemethanols is offset by their phytotoxic activity.

The possibility that substituted o(-dialkylaminomethyl-3-phenyl-1- naphthalenemethanols, as analogs of the 4-quinolinemethanols, would be effective antimalarials, yet not have the phototoxic side effect, is discussed in this paper. Synthetic pathways to the naphthalenemhethanols are discussed. Experimental procedures are …