Browsing M.Sc. Chemistry by Title
Now showing items 151-170 of 199
-
Sample preparation and heavy metal determination by atomic spectrometry /
(Brock University, 2004-06-29)Microwave digestions of mercury in Standards Reference Material (SRM) coal samples with nitric acid and hydrogen peroxide in quartz vessels were compared with Teflon® vessel digestion by using flow injection cold vapor ... -
The satellite band patterns in the near ultraviolet absorption spectra of isotopic compounds of acetaldehyde
(Brock University, 1978-07-09)The 3700 A - 3000 A absorption spectra of CH3CHO and its isotopic compounds such as CH3CDO, CD3CHO and CD3CDO were studied in the gas phase at room temperature and low temperatures. The low resolution spectra of the ... -
Selected topics in fast atom bombardment (FAB) mass spectrometry a)specially designed probe tips and ion generation, b)structures of vitamin B6 schiff base complexes
(Brock University, 1988-07-09)This thesis can be broken down into two sections. Section one is a study . of the ionization mechanisms and the ion source optimization for Fast Atom Bombardment (FAB) ionization. For this study, several specially designed ... -
The Smiles rearrangement in hydrazidic systems and related syntheses /|nG. A. Pawelchak. -- 260 St. Catharines, Ont. : [s. n.],
(Brock University, 1971-07-09)This research was directed towards the investigation of the Smiles rearrangement in hydrazidic systems and the synthesis of related heterocyclic compounds. The work can be conveniently divided into two main sections. Section ... -
Sol-gel routes to supported Friedel-Crafts alkylation catalysts
(Brock University, 1998-07-09)Aluminosilicate catalysts containing supported ZnCl2 and metal fluoride salts have been prepared using a sol-gel based route, tested and characterized. The activities of these ZnCl2 + metal fluoride catalysts, while ... -
Solid state NMR chemical shifts as an alternative to diffraction data in the determination of SIC polytypic structures
(Brock University, 1988-07-09)Silicon carbide, which has many polytypic modifications of a very simple and very symmetric structure, is an excellent model system for exploring, the relationship between chemical shift, long-range dipolar shielding, ... -
Solute effects on the production and decay of primary species in the flash photolysis of indole
(Brock University, 1981-07-09)Maximum production rates ofs and decay kinetics for the hydrated electron, the indolyl neutral radical and the indole triplet state have been obtained in the microsecond, broadband (X > 260 nm) flash photolysis of ... -
Some aspects of the chemistry of 1, 3, 4 - Thiadiazolium salts and related compounds
(Brock University, 1977-07-09)The work described in this thesis has been divided into seven sections. The first section involves the preparation of N'-acyl-N'-arylN- benzothiohydrazides by the acylation of N'-aryl-N-benzothiohydrazides and is followed ... -
Some aspects of the chemistry of Reissert compounds / |nDurga Prasad Aysola. -- 260 St. Catharines [Ont. : s. n.],
(Brock University, 1976-07-09)1-(0- and m-Ohlorobenzoyl)isoquinolines have been synthesized by two routes involving Reissert compounds. One route involves condensation of 2-benzoyl-l,2-dihydroisoquinaldonitrile with the appropriate chlorobenzaldehyde ... -
Some electrical properties of semi-conductor crystals / |nPhyu Phyu Khin. -- 260 St. Catharines, Ont. : [s. n.],
(Brock University, 1972-07-09)SiC and AtB 12 have been prepared and their resistivities and Hall voltages measured. The resistivities and Hall voltages were measured by the Van der Pauw's method, using spring loaded tungsten contacts. In this method, ... -
Spectroscopic and theoretical considerations of cyclopropenone
(2012-12-19)The absorption spectrum of cyclopropenone has been photographically recorded under conditions of long pathlength (60 m), and moderate resolution (7.8 A/rom). The absorption was assigned to the ... -
Strong hydrogen bonding in organic synthesis
(Brock University, 1978-07-09)The preparation of phenacyl and para-phenylphenacyl esters, the reactions of carboxylic acids, phenols, 2-nitropropane and alcohols with alkyl halides in the presence of fluoride anion are described. The reactions are ... -
Studies in the mass spectra of perfluoroaromatic derivatives of phosphorus and some selected transition metals
(Brock University, 1975-10-02)The mass spectra and fragmentation of a variety of fluoroaromatic compounds of Group V and some selected transition elements are discussed in some detail, aided by data from metastable defocussed experiments. Results ... -
Studies in the synthesis of 4, 5-disubu/stituted phenanthrenes /|nK. Ramakrishnan. -- 260 St. Catharines, Ont. : [s. n.],
(Brock University, 1972-07-09)The work described in t his thesis was initiated with the intention of exploring new routes for the synthesis of certain 4, 5-disubstituted phenanthrenes. A series of reactions have been investigated in detail and several ... -
Studies of nucleophilic attack on tris (pentafluorophenyl) phosphine and its oxides
(Brock University, 1977-07-09)The reaction of tris(pentafluorophenyl)phosphine [5] with the nucleophiles dimethyl formamide (DMF), hexamethylphosphoric triamide (HMPA), diethyl formamide (DEF), hexaethylphosphoric triamide (HEPA), hydrazine, ... -
Studies of some cocondensations of nickel atoms with unsaturated organic ligands and with mixed ligand systems
(Brock University, 1980-07-09)The cocondensation of nickel with a number of unsaturated ligands was studied, as was the cocondensation with a number of mixed ligand systems. Enamines were found not to react with nickel while acrylonitrile was ... -
Studies of tetrahedral haloboron cations of pyridines and aliphatic tertiary amines
(Brock University, 1985-07-09)The preparation of the haloboron cations D2BF2 + and DD'BF 2+, where D=R3N or a pyridine, has been systematically . 19 11 studied uS1ng F and B n.m.r. Both types of amines form numerous difluoroboron cations by heavy ... -
Studies on oxamyl : analytical method development and investigation of fate in peach seedlings and corn seeds
(Brock University, 1982-07-09)A high performance liquid chromatographic method employing two columns connected in series and separated~y·a.switching valve has been developed for the analysis of the insecticide/ nematicide oxamyl (methyl-N' ... -
Studies on the insecticide - nematicide-oxamyl and its quantitative determination by gas chromatographic method
(Brock University, 1977-07-09)Ox amyl , an insecticide/nematicide with the chemical name; methyl ~'. ~·-dimethyl-~-(methylcarbamoyl)oxy-l-thiooxamimidate, and its major degradation compound; oxime or oximino compound, methyl ~',~'-dimethyl-~-hydro ... -
Study of the application of the high performance liquid chromatography-particle beam interface-mass spectrometry technique on some pesiticides and the reduction phenomena in the system
(Brock University, 1994-07-09)This work includes two major parts. The first part of the work concentrated on the studies of the application of the highperfonnance liquid chromatography-particle beam interface-mass spectrometry system of some pesticides. ...