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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
1

Characterisation of clay/surfactant/oil systems

Williams-Daryn, Shira January 2002 (has links)
No description available.
2

Mica weathering to vermiculite surface morphological and ionic changes.

Raman, K. V. January 1965 (has links)
Thesis (Ph. D.)--University of Wisconsin--Madison, 1965. / Typescript. Vita. Includes bibliographical references.
3

Montmorillonites and vermiculites of soils chemical composition and cation exchange behavior.

Sawhney, B. L. January 1957 (has links)
Thesis (Ph. D.)--University of Wisconsin--Madison, 1957. / Typescript. Abstracted in Dissertation abstracts, v. 18 (1958) no. 6, p. 1922-1923. Vita. eContent provider-neutral record in process. Description based on print version record. Includes bibliographical references (leaves 99-108).
4

The Geochemical Trends of Major and Select Trace Elements through a Soil Profile Near Mt. Daisen, Japan

Jackson, Cynthia 16 December 2015 (has links)
After a catastrophic 9.0 magnitude earthquake struck the east coast of Japan in April 2011, a chain of events was set in motion leading to the release of several volatile radionuclides of Cs and I into the atmosphere due to explosions in three of the six reactor cores at the Fukushima-Daiichi Nuclear Power Plant (FDNPP). This study shows the enrichment of stable Cs relative to other alkali metals at the surface soil samples collected from a 1m thick andisol at Mt. Daisen, Japan, roughly 700 Km SW from the FDNPP. Cs is not enriched in three surface soils collected from the Fukushima Prefecture outside the restricted area. The relative enrichment of Cs compared to other alkali metals show the potential of long-term fixation of radiocesium in these Mt. Daisen soils.
5

Effect of permanent and pH-dependent charges on clay-phase retention and excised root uptake from Donnan-type systems of vermiculite and kaolinite /

Baweja, Anar Singh January 1972 (has links)
No description available.
6

Quartz, vermiculite, and montmorillonite determination, and clay mineralogy of selected soils from the north central United States

Chapman, Stanley L. January 1970 (has links)
Thesis (Ph. D.)--University of Wisconsin--Madison, 1970. / Typescript. Vita. eContent provider-neutral record in process. Description based on print version record. Includes bibliographical references.
7

Strategic marketing options

Du Toit, Ronald 02 February 2011 (has links)
The aim of this research was to determine if strategic marketing options will grow the sales of finer grade vermiculite.
8

Estudo da aplicação de vermiculita como carga ativa em verniz uretânico. / Study of the application of vermiculite as active filler in urethane varnish.

José Mauro Diniz Oliveira 24 November 2017 (has links)
O surgimento de um material na área de engenharia torna-se um marco para buscar novas aplicações gerando assim novas tecnologias. Neste estudo utilizou-se a vermiculita expandida e processada como novo material para sistemas uretânicos. A utilização de qualquer novo material, requer conhecimento prévio de seu desempenho em algumas situações técnicas; resultando com isso, desenvolvimentos de tecnologias para o emprego deste material nos segmentos adequados. Na busca para compreender o comportamento da vermiculita em sistemas uretânicos, esta vermiculita foi processada, a partir da sua forma bruta, até obter uma granulometria adequada para adição em meios uretânicos. A adição da vermiculita em vernizes uretânicos, foi no sentido de gerar conhecimentos sobre o comportamento deste material em sistemas formadores de filmes. Neste estudo, foi investigado o aparecimento de cor, o surgimento de tonalidades, a elevação de dureza de filmes uretânicos, a investigação de ação reacional em sistemas uretânicos de dois componentes e, foi também investigado o efeito de barreira em filmes uretânicos contendo vermiculita processada na sua composição. E, após avaliação dos resultados obtidos, comprovou-se que a vermiculita piroexpandida processada por moagem pode ser utilizada como matéria-prima de interesse em vernizes de composição uretânica. / The discovery of a material in the area of engineering is a milestone to seek new applications thus generating new technologies. In this study the expanded vermiculite was processed as a new material for urethane systems. To use any new material it is necessary to know its performance in some technical situations; to gets developments in technologies for the new use of this material in the appropriate segments. In the search to visualize the behavior of the vermiculite in urethane systems, this vermiculite was processed, from its crude form, until obtaining suitable granulometry for addition in urethane media. The addition of vermiculite to urethane varnishes was aimed at generating knowledge about the behavior of this material in film forming systems. In this study, the development ocolor, the appearance of shades, urethane film hardness increase, reactional action investigation in two component urethane systems were investigated and the barrier effect was also investigated in urethane films containing vermiculite processed in Its composition. After evaluation of the obtained results, it was verified that the vermiculite pyroexpandida processed by grinding can be used as raw material of interest in varnishes of urethane composition.
9

Strategic marketing options

Du Toit, Ronald 02 February 2011 (has links)
The aim of this research was to determine if strategic marketing options will grow the sales of finer grade vermiculite.
10

Estudo da aplicação de vermiculita como carga ativa em verniz uretânico. / Study of the application of vermiculite as active filler in urethane varnish.

Oliveira, José Mauro Diniz 24 November 2017 (has links)
O surgimento de um material na área de engenharia torna-se um marco para buscar novas aplicações gerando assim novas tecnologias. Neste estudo utilizou-se a vermiculita expandida e processada como novo material para sistemas uretânicos. A utilização de qualquer novo material, requer conhecimento prévio de seu desempenho em algumas situações técnicas; resultando com isso, desenvolvimentos de tecnologias para o emprego deste material nos segmentos adequados. Na busca para compreender o comportamento da vermiculita em sistemas uretânicos, esta vermiculita foi processada, a partir da sua forma bruta, até obter uma granulometria adequada para adição em meios uretânicos. A adição da vermiculita em vernizes uretânicos, foi no sentido de gerar conhecimentos sobre o comportamento deste material em sistemas formadores de filmes. Neste estudo, foi investigado o aparecimento de cor, o surgimento de tonalidades, a elevação de dureza de filmes uretânicos, a investigação de ação reacional em sistemas uretânicos de dois componentes e, foi também investigado o efeito de barreira em filmes uretânicos contendo vermiculita processada na sua composição. E, após avaliação dos resultados obtidos, comprovou-se que a vermiculita piroexpandida processada por moagem pode ser utilizada como matéria-prima de interesse em vernizes de composição uretânica. / The discovery of a material in the area of engineering is a milestone to seek new applications thus generating new technologies. In this study the expanded vermiculite was processed as a new material for urethane systems. To use any new material it is necessary to know its performance in some technical situations; to gets developments in technologies for the new use of this material in the appropriate segments. In the search to visualize the behavior of the vermiculite in urethane systems, this vermiculite was processed, from its crude form, until obtaining suitable granulometry for addition in urethane media. The addition of vermiculite to urethane varnishes was aimed at generating knowledge about the behavior of this material in film forming systems. In this study, the development ocolor, the appearance of shades, urethane film hardness increase, reactional action investigation in two component urethane systems were investigated and the barrier effect was also investigated in urethane films containing vermiculite processed in Its composition. After evaluation of the obtained results, it was verified that the vermiculite pyroexpandida processed by grinding can be used as raw material of interest in varnishes of urethane composition.

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