Thesis (Ph. D.)--Michigan State University. Dept. of Chemical Engineering and Materials Science, 2008. / Title from PDF t.p. (viewed on July 23, 2009) Includes bibliographical references. Also issued in print.

Thesis (M.S.)--Florida State University, 2004. / Advisor: Dr. Qi Wang, Florida State University, College of Arts and Sciences, Dept. of Mathematics. Title and description from dissertation home page (viewed Sept. 27, 2004). Includes bibliographical references.

Thesis (Ph. D.)--University of Wisconsin--Madison, 1958. / Typescript. Abstracted in Dissertation abstracts, v.18 (1958) no. 6, p. 2108. Vita. eContent provider-neutral record in process. Description based on print version record. Includes bibliographical references (leaves 99-100).

Thesis (Ph.D.)--University of Nebraska-Lincoln, 2006. / Title from title screen (site viewed on Nov. 13, 2006). PDF text: xiii, 188 p. : ill. ; 11.13Mb. UMI publication number: AAT 3217532. Includes bibliographical references. Also available in microfilm and microfiche format.

Thesis (M.Sc.)--City University of Hong Kong, 2004. / At head of title: City University of Hong Kong, Department of Physics and Materials Science, Master of Science in materials engineering & nanotechnology dissertation. Title from title screen (viewed on Aug. 31, 2006) Includes bibliographical references.

Thesis (Ph. D.)--Chemistry and Biochemistry, Georgia Institute of Technology, 2006. / Dr. Uwe H. F. Bunz, Committee Chair ; Dr. Laren M. Tolbert, Committee Member ; Dr. Joseph Perry, Committee Member ; Dr. David M. Collard, Committee Member ; Dr. Anselm C. Griffin, Committee Member.

Resultados de medidas de ponto de fusão, análise por raios-x e de espectroscopia infravermelho são apresentados para a identificação de dois polimorfos do ácido 5-etil-5-sec-butil barbitúrico (butabarbital).A estrutura do polimorfo II foi refinada simultaneamente com dois conjuntos de dados de origens diversas. Os dados cristalográficos são: a= 10,280 &#197, b= 20,091, c= 11,920, d= 110&#176 30\' monoclínico, grupo espacial I2/c, com oito moléculas por cela unitária.Os resultados obtidos com os dois conjuntos de dados concordam a menos do erro experimental. É comprovada a existência de desordem na estrutura e é feita uma análise dos problemas do refinamento. / Results of measures of melting point, X-ray analysis and infrared spectroscopy are presented for the identification of two polymorphs of acid 5-ethyl-5-sec-butyl barbiturate (butabarbital).The structure of polymorph II was refined simultaneously with two sets of data of different origins. The crystallographic data is a= 10,280 &#197, b= 20,091, c= 11,920, d= 110&#176 30\' monoclinic system, space group I2 / c with eight molecules per unit cell.The results obtained with the two data sets agree nothing experimental error. It neas proved the existence of disorder in the structure and on analyses done about the problems of refinement.

Abstract Synthetic routes were developed for the preparation of 2-alkoxy-4-hydroxybenzoic acids and 2-alkoxyhydroquinones, and a large-scale synthesis was developed for the preparation of 2-thioalkoxyhydroquinones. The 2-alkoxy-4-hydroxybenzoic acids, which contained alkyl side chains of different length, were used in the synthesis of new main chain liquid crystalline (LC) homo-, random, and block co-oligomers. In addition, oligomers of terephthaloyl chloride and 2-thioalkoxyhydroquinones and oligomers of terephthaloyl chloride and 2-alkoxyhydroquinones were produced. All the oligomers were blended with aliphatic polyamide 11 (PA 11). The effect of alkyl side chain length on the compatibility behavior of the LC oligomers towards the aliphatic polymer was characterized by DSC and FTIR, and the effect of side chain length on the flexural properties of the blends was investigated with a three-point bending test. The miscibility studies showed variable interfacial adhesion between the blended compounds. The strongest adhesion was achieved between PA 11 and the homo-oligomers of 2-alkoxy-4-hydroxybenzoic acids with short or medium long substituents (C4-C10), but the interactions between PA 11 and the oligomer with long aliphatic side chain (C18) were poor, as were those between PA 11 and the wholly aromatic oligomer of 4-hydroxybenzoic acid. The compatibility between PA 11 and the co-oligomers of 2-alkoxy-4-hydroxybenzoic acids was slightly lower than the compatibility of the corresponding homo-oligomers. DSC and FTIR analyses of the blends of oligomers of terephthaloyl chloride and 2-thioalkoxyhydroquinones and oligomers of terephthaloyl chloride and 2-alkoxyhydroquinones with PA 11 implied that the interactions between the blended compounds were poor. FTIR spectra and viscosity measurements confirmed that all the oligomeric structures could self-associate, with effect on the final mechanical properties of the polyamide. The strength of PA 11 in a three-point bending test was increased by the addition of only 1% of LC oligomers to the matrix. The results also showed that the strengthening ability of the oligomers is directly proportional to the total amount of aliphatic carbons. The best strengthening results were obtained with unsubstituted oligomers, random co-oligomers of 2-alkoxy-4-hydroxybenzoic acids, and homo-oligomer of 2-butoxy-4-hydroxybenzoic acid. DSC investigations of a ternary blend of the oligomer of 2-decanyloxy-4-hydroxybenzoic acid, PA 11, and wholly aromatic commercial LC polymer showed the promising compatibilizing effect of the oligomer.

Benjamin Lake map-area lies within the Archaean Slave province of the Canadian Shields. It is underlain by metamorphosed volcanic and sedimentary rocks of the Yellowknife Group that are tightly folded and have been intruded by a series of granodiorite plutons. Assessment of the relations between metamorphism and intrusion is based mainly on field observations, on the results of a petrographic study of over 300 thin sections of the metasedimentary and granitic rocks, and on mineral compositions determined by optical methods. The reactions that produced the various metamorphic minerals are discussed. Regional metamorphic grade in the metasediments ranges from the upper part of the greenschist facies to the middle part of the cordierite-amphibolite facies of the low pressure andalusite-sillimanite facies series. Pelites and semipelites of amphibolite grade are knotted schists characterized by large porphyroblasts of cordierite and andalusite. Metamorphism, in part synkinematic, has outlasted regional deformation. Increase in the andalusite content of the knotted schists towards the east-southeast is considered to have been controlled by conditions of metamorphism rather than by changes in rock composition. Stability relations of observed minerals and their assemblages lead to estimates of conditions during regional metamorphism between 450° and 600°C at between 2 and 3½ Kb. Both pressure and temperature increased in an east-southeasterly direction. The cordierite isograd represents an isothermal surface of about 525°C. Granodioritic magma invaded the metasediments during the later stage of tectonism. Time relations between the resultant plutons have been established. The earliest plutons were emplaced during regional metamorphism and involved the bordering metasediments in the formation of migmatites. Later intrusions have sharp contacts and display a range in form from narrow, dike-like stocks to plutons with oval plan. The latter appear to have developed from the former by swelling in place and have accommodated themselves by pushing aside the previously deformed metasediments. Later still are larger plutons that are concordant in parts and discordant in others. Introduction of pegmatites preceded this latest phase of intrusion but succeeded the earlier phases. The plutonic series shows a gross compositional change with time from equigranular hornblende-biotite quartz diorite through biotite granodiorite to porphyritic granodiorite and quartz monzonite with megacrysts of K-feldspar. Some stocks of granodiorite show a certain amount of internal differentiation, with the K-feldspar content increasing from margin to core. Granodiorite stocks are surrounded by narrow aureoles in which the rocks are characterized by higher proportion of biotite and andalusite than in the regional knotted schists. Pressure-temperature relations between cordierite-muscovite and biotite-andalusite assemblages suggest that pressures in the aureoles of the stocks were slightly higher than those that prevailed during regional metamorphism, which in turn suggests forceful intrusion. The presence of high quartz pseudomorphs in some granodiorites places an upper pressure limit of about 4 Kb on granodiorite crystallization. / Arts, Faculty of / Philosophy, Department of / Graduate

No description available.