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Corrosion Inhibition with Quaternary Amines
This thesis describes experiments made to test the corrosion inhibition of quaternary amines on steel.
Date:
August 1969
Creator:
Raiszadeh, Habib
System:
The UNT Digital Library
Metal (II) Complexes with N-Salicylideneamino Acids
Transition metal complexes derived from Schiff bases have rendered an important contribution to the development of modern coordination chemistry. Various stable compounds have been prepared having synthetic, biological, and physicochemical interest. In particular, complexes of salicylaldimines, B-ketoamines, and closely related ligand systems have been investigated.
Date:
August 1969
Creator:
Carlisle, Gene Ozelle
System:
The UNT Digital Library
Some Studies Pertaining to the Biosynthesis and Metabolism of Asparagine and Lysine in Lactobacillus Arabinosus: I. B-Aspartylhydroxamic Acid: Its Action as a Feedback Inhibitor and a Repressor of Asparagine Synthetase in Lactobacillus Arabinosus II. Purification and Properties of Diaminopimelate Decarboxylase from Lactobacillus Arabinosus
That Lactobacillus arabinosus 17-5, ATCC 8014, can supply its own requirement for the amino acid, lysine, is demonstrated by the fact that the organism is capable of growth in media devoid of lysine. Since the final biosynthetic step in lysine formation in all bacteria studied to date involves the decarboxylation of meso-dlaminopimelic acid (DAP) to produce lysine, it was of interest to determine whether an enzyme catalyzing such a reaction (DAP decarboxylase) is present in L. arabinosus.
Date:
August 1969
Creator:
Chen, Yueh Tsun
System:
The UNT Digital Library
Metal Complexes of 2,3-Quinoxalinedithiol
A series of new planar complexes with the dianion of 2,3-quinoxalinedithiol ligand has been prepared. The complexes have been characterized from the study of their analyses, magnetic moment, conductance, polarograms, electron spin resonance spectra, and electronic spectra, and compared with the available data on the corresponding maleonitriledithiolene and toluene-3,4-dithiolene complexes.
Date:
May 1969
Creator:
Ganguli, Kalyan Kumar, 1912-
System:
The UNT Digital Library
Synthesis and Study of Certain Amino Acids Containing the Pyridine Ring
This study reported herein involves the synthesis and determination of certain biological activities of 4,5-dihydroxy-2-pyridinealanine and the synthesis of 3-pyridine-N-methylalanine.
Date:
January 1969
Creator:
Sanders, Edward Henry
System:
The UNT Digital Library
Bonding Studies on Organolithium Compounds
This study is concerned with the nature of the relatively unusual bonding which occurs in organolithium compounds as a direct result of the oligomerization and possible explanations for that bonding.
Date:
August 1968
Creator:
Peyton, Gary
System:
The UNT Digital Library
The Electrochemical Properties of the Mercury/lithium Nitrate-potassium Nitrate Eutectic Interface
The original purpose of this investigation was to attempt to apply the coulostatic method directly to a molten salt system. The inability to duplicate the reported capacity data for this system resulted in an investigation of the probable cause of this discrepancy between the data obtained by these different methods (14, 15).
Date:
August 1968
Creator:
Flinn, David R.
System:
The UNT Digital Library
Some Studies Involving Pyridine N-oxide Reductase
The study herein described involved the detection of pyridine N-oxide reductase activity in cell-free extracts of E. coli 9723, the determination of co-factors necessary for the enzymatic process, a study of the optimum conditions for enzyme catalysis, and a general characterization of the enzyme.
Date:
August 1968
Creator:
Waters, Samuel Wayne
System:
The UNT Digital Library
Some Studies of Tryosinase Activity in Streptomyces Antibioticus
The study reported herein concerns itself with the isolation of melaninless mutants of S. antibioticus, ATCC, 3723, and with the demonstration that at least one of the sites of mutation involves that of the enzyme, tyrosinase.
Date:
August 1968
Creator:
Chen, Evelyn Li-ming
System:
The UNT Digital Library
Conformationally Stable Cyclohexyllithium Compounds
Organolitnium compounds have been employed in synthetic worK for many years. However only during the last decade has much progress been made in establishing the mechanistic pathways for the reactions of these compounds.
Date:
January 1968
Creator:
Selman, Charles Melvin
System:
The UNT Digital Library
Magnetic Exchange in Oxovanadium(IV) Complexes with N-Salicylideneamino Acids
Copper(II) and oxovanadium(IV) ions resemble one another magnetically in having one unpaired electron in their complexes irrespective of their geometrical structures and bond types involved. Copper(II) complexes with antiferromagnetic exchange are well known. On the contrary, antiferromagnetic exchange in oxovanadium(IV) complexes is rather new and not well established. Very few oxovanadium(IV) complexes have been reported to have this anomalous magnetic property. In the investigation of the magnetic properties of oxovanadium(IV) complexes, we have successfully prepared two series of new oxovanadium(IV) complexes with N-salicylideneamino acids.
Date:
January 1968
Creator:
Hu, James Hung-Jen
System:
The UNT Digital Library
Preparation of N-Substituted Hydroxylamines from Oxaziridines
In many series of compounds, intensity of biological activity and chemical reactivity are proportional. Generally whenever a alkyl group replaces a reactive hydrogen atom, as would be the case for an N-substituted hydroxylamine as compared to hydroxylamine, the over-all biological activity of the resulting compound is lower than that of its nonalkylated analogue. Since toxicity and physiological activity are not proportional, this comparison can only suggest possible types of derivatives to prepare and test.
Date:
January 1968
Creator:
Truitt, Sharon G.
System:
The UNT Digital Library
Kinetics and Mechanism Study of Diphenylketene Cycloadditions
From a review of the published work in the field of cycloadditions, it is evident that further research is needed to establish the mechanism of ketene cycloadditions. This work was initiated with the intent of obtaining kinetic data which will contribute to the elucidation of the mechanism of ketene cycloadditions.
Date:
August 1967
Creator:
O'Neal, Hubert Ronald
System:
The UNT Digital Library
Synthesis of Ether-free Organomagnesium Compounds
At the time this work was begun, there was some confusion about the technique necessary for the successful synthesis of organomagnesium compounds in hydrocarbon solvents and without solvents. It was decided to repeat the work of Bryce-Smith and Zakharkin. Thus began the study of the synthesis of organomagnesium compounds without solvents; the study of the reaction products of these organomagnesium compounds in hydrocarbons plus 2-butanone compared to the reaction products of the corresponding etheral Grignard reagent plus 2-butanone; and a preliminary study of the nature of these organomagnesium compounds in hydrocarbon solvents.
Date:
August 1967
Creator:
Hanicak, John E.
System:
The UNT Digital Library
Cycloadditions of Dichloroketene
An investigation of the cycloaddition behavior of dichloroketene with various types of olefins seemed in order to determine if dichloroketene behaved similarly to dialkylketenes. It was anticipated that a study of this type would indicate the reactivity of dichloroketene to various types of olefinic compounds and thus establish if the ease of cycloaddition with dichloroketene parallels the nucleophilicity of the olefin as it does in dialkylketenes.
Date:
June 1967
Creator:
Waters, Oralee Hurst
System:
The UNT Digital Library
Discontinuous Thermal Expansions and Phase Transformations in Crystals at Higher Temperatures
The purpose of this investigation is to make more detailed studies of transformations. Fourteen compounds have been examined by high temperature X-ray diffraction for this purpose. The investigations have been carried out in such a way as to reveal: 1. the existence of transformations, 2. the influence of polarizability on thermal expansion, 3. the anisotropy of expansion, and 4. the discontinuity of thermal expansion.
Date:
1967
Creator:
Hsu, Yuan Tsun
System:
The UNT Digital Library
Nuclear Magnetic Resonance Spectra of Some 1,2,4-triazoles
In the work undertaken here, NMR has been used to ascertain the structure of some 1,2,4-triazoles. The investigation provides information concerning the structure of potentially tautomeric triazoles such as hydroxy- and aminotriazole. Connected with this aspect of triazole chemistry is the larger problem of mesohydric tautomerism. The present study also yields information for a comparison of substituent effects in triazoles, N-heteroaromatic substances and benzene.
Date:
January 1967
Creator:
Creagh, Linda Truitt
System:
The UNT Digital Library
Electronic Effects in Dihaloketenes
The objective of this investigation was to determine the electronic effects of the halogen atoms in dihaloketenes such as dichloroketene and dibromoketene.
Date:
August 1966
Creator:
Vaughn, Walter L.
System:
The UNT Digital Library
Naphth [2,3-d] Imidazoline-2,4,9-Triones
The study of some acylurea derivatives of 2-amino-3-alkylamino- and -3-arylamino-1,4-naphthoquinones was undertaken to determine the course of reaction under conditions similar to those used by J. R. Hoover and A. R. Day to prepare 2-alkyl-1H-naphth[2,3-d] imidazole-4.9-diones from 2-acylamino-3-amino-1,4-naphthoquinones.
Date:
August 1966
Creator:
Witkowski, Joseph T.
System:
The UNT Digital Library
Base Effects on the Thermal Decomposition of Sec-butyllithium Solutions
The pyrolysis of sec-butyllithium in solution was studied in an attempt to understand the loss of stereo-specificity and the atypical kinetics that have been reported. Additionally, the effect of added lithium alkoxides was studied to determine their effects on the highly reactive sec-butyllithium substrate.
Date:
June 1966
Creator:
Adams, George Michael
System:
The UNT Digital Library
Synthesis of Selected 2-imidazolines
Since Djerassi and Scholz found that 2-(aryloxy-methyl)imidazolines and their hydrochloride salts exhibit vasoconstrictive properties, the 1,2-(I) 1,3-(II) and 1,4-bis-(2-imidazolinylmethoxy) benzene (III) analogs (Fig. 1, p.2) were chosen for synthesis in order to test them for their effective vasoconstrictive characteristics and for whatever other physiological properties they might exhibit.
Date:
June 1966
Creator:
Maurer, Larry Eugene
System:
The UNT Digital Library
The Dropping Gallium Electrode in Fused Salts
This paper is an attempt to appraise the usefulness of the dropping gallium electrode (DGE) in fused LiNO3-KNO3, to compare it with the dropping mercury electrode (DME), and to study the DGE in fused LiCl-KCl.
Date:
January 1966
Creator:
Dickie, D. Kent
System:
The UNT Digital Library
Organomagnesium Compounds in Benzene Solvent and Their Application in Synthesis of Organoberyllium Compounds
The work reported by D. Bryce-Smith and G. F. Cox, along with several recent publications describing experimental results designed to elucidate the long disputed question of the structure of the Grignard reagent in ether stimulated the work reported here, in an effort to obtain additional evidence of the structure of the organomagnesium complex in benzene solvent. Since the primary objective of this work was to prepare organoberyllium compounds using the organomagnesium complexes in hydrocarbon solvents, it seemed an insight into the structure of these complexes would be beneficial in this work. The techniques used and experimental evidence obtained from the structure elucidation of the ethereal Grignard reagent have been most helpful in organization of the methods used to study the structure of organomagnesium halide complexes in benzene solvent. It seemed that an insight into the structure of these organomagnesium halide complexes in hydrocarbon solvents would be beneficial in accomplishing the second objective of this work. This objective was to prepare organoberyllium compounds using the organomagnesium halide complexes prepared in hydrocarbon solvents.
Date:
January 1966
Creator:
Selman, Charles M.
System:
The UNT Digital Library
Synthesis, Characterization, and Optical Isomerism of Some Cobalt (III) Complex Compounds
This thesis investigates the synthesis, characterization, and optical isomerism of some cobalt (III) complex compounds.
Date:
January 1966
Creator:
Hu, Hung-Jen
System:
The UNT Digital Library