Thesis (Ph. D.)--University of Wisconsin--Madison, 1964. / Typescript. Vita. eContent provider-neutral record in process. Description based on print version record. Includes bibliographical references.

University, Diss., 2003--Bonn.

Thesis (M.S.)--Baylor University, 2006. / Includes bibliographical references (p. 73-78).

Universiẗat, Diss., 2004--Bonn.

University, Diss., 2005--Bonn.

Orientador: Antonio Roberto Saad / Banca: Jairo Roberto Jimenez Rueda / Banca: José Eduardo Zaine / Banca: Antonio Manoel dos Santos Oliveira / Banca: Maira Barberi / v. 1. Texto - v. 2 Anexos e encartes / Resumo: O propósito desta tese foi o de estudar o alto curso do rio Meia Ponte através da integração dos processos de sedimentação quaternária, da caracterização paleoambiental e da interação antrópica, nesta que é a área mais densamente povoada do Estado de Goiás, visando a contribuir com o conhecimento técnico-científico da região. São apresentadas algumas propostas visando ao uso planejado dos recursos naturais da bacia hidrográfica do rio Meia Ponte, principalmente a criação de Áreas de Preservação Ambiental e estabelecimento de um programa de monitoramento hidrossedimentológico nas estações já existentes. / Abstract: The purpose of this thesis was of studying Meia Ponte river's high course through the integration of the processes of quaternary sedimentation of the palaeoenvironmental characterization, and of the anthropic interaction in that that is the area more densely populated of Goiás state, seeking to contribute with the technician-scientific knowledge of the area. Some proposed are presented seeking the planned use of the natural resources of the hidrographic basin of the Meia Ponte river, mainly creation of Environmental Preservation Areas and the establishment of a program of hydrosedimentalogical monitoring in the stations already existent. / Doutor

Channelling and compression in batch and continuous gravity sedimentation systems have been investigated using an electrical impedance imaging technique. The accuracy of such a system is shown to be a function of a number of variables, in particular particle morphology. Not all materials were found to be suitable to this form of imaging. Three primary materials, aragonite, calcite and talc were used, each exhibited random channelling, i.e. channel formation was not due to the presence of foreign bodies or externally induced. Channels in this type of channelling form within a zone which grows and propagates upwards into a suspension. Through visual observations this region has been sub-divided into hard and soft zones. Superposition of zone propagation on characteristic (loci of concentration) plots has yielded information on the conditions required for channel formation and growth and has led to a revised set of conclusions on the nature of random channelling.

The purpose of this thesis was to investigate the pattern of distribution of some elements in the tidal flat environment at Mud Bay near Crescent Beach, B.C. Samples of sediment were collected in a regular pattern over the bay. Quantitative chemical analyses of the samples were made for acid-soluble copper, zinc, lead, and molybdenum. The same samples were analysed spectrochemically for iron and sulphur. The results of the analyses were plotted on base maps and contoured. It was found that there was a definite pattern of sedimentation. Because of the shallow depth of water at high tide and the bay's sheltered aspect, deposition of finer-grained material occurred near shore. In slightly deeper and more exposed parts of the bay fine-grained material was winnowed leaving coarse-grained sediment. Most of the elements showed a definite pattern of distribution. Sulphur, copper, and zinc showed a tendency to concentrate in finer-grained materials. Iron, in the form of magnetite, was deposited with coarser-grained materials near river mouths and exposed parts of the bay. Lead values were too low to permit conclusions regarding its distribution. Molybdenum concentrations were below the detection level of the method of chemical analysis. No attempt was made to determine the form in which the elements were present nor to determine the reason for their concentration other than to suggest the most obvious possibilities. / Science, Faculty of / Earth, Ocean and Atmospheric Sciences, Department of / Graduate

The preparation of root nodule extract by Virtanen, et. al., has created a good deal of interest in the study of plant hemoglobin (legoglobin). In the preparation of any new substances, it is of interest to determine the physical constants of the new species.

No description available.