Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 54 for “"pure form"”.
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The effect of energy input on precipitation in an oscillating grid reactor
… industry aiming at producing chemicals in a pure form and at the lowest possible cost. In practice this has resulted in a shift from treating processes as "black boxes" towards developing more concise models which reveal what happens within these "black boxes". This shift can be discerned at …
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Kinetic Modeling of Mesophilic Digestion of Swine Manure Containing an Antibiotic Inhibitor (Methane, Biogas)
… the fermentation process. Also, addition of the pure form of the antibiotic to the control substrate was examined. Antibiotic concentrations of 0, 25, 50 and 100 grams CTC per ton of feed were tried at 8-, 12-, 20- and 30-day RT's at an influent substrate concentration of 3 percent volatile …
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Synthesis of aza-tryptophan derivatives.
… aldol condensation of 1-tert-butoxycarbonyl-3-formyl-7-azaindole with methyl hippurate installed the carbon framework necessary for the intended product. Subsequent deoxygenation and deprotection of the indole, ring, and the amino and acid functional groups yielded racemic 7-azatryptophan A …
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A Study Of The Xenon Vapour Pressure Isotope Effect
… is 136Xe which is not easily available in pure form, and it is available from the Centrifuge systems in Russia. Therefore, the VPIE of xenon isotopes were needed which have not been measured to date. The VPIE from this work would be 5.28 x 10-5 while the theoretical value reported by Tew is …
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4 urban houses
… been exploring is found in the simplicity of the forms, geometry and conditions in the architecture of the Shakers and the Ticino architects in Switzerland. The formal simplicity of this architecture allows for a clarity in the relationship between light, construction and space. This position 1s …
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Filled With Absence: Spaces for Mourning
Long ago the stories common to men were clearly present in their architecture. Sculpture, mosaics, paintings, stained-glass windows, all blatantly told the beginning, the morals, the epics, and future of humanity. Today these elements have all but disappeared along with the stories that they told. …
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A Comparative Analysis of Four Basic Patterns of Style in Nineteenth-Century and Twentieth-Century British Expository Prose
… the four divisions of rhetoric exemplified in a pure form. Therefore it must be said that the selections chosen are those in which the primary purpose of the author is exposition; that is, the chosen selections are those in which the primary endeavor of the author is "an attempt to explain a …
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Porter's strategy and the influence of guanxi and government policies in small and medium-sized pharmaceutical companies in China
… the policy environment of national Medical Reform for 2009. The national policy acknowledged the growing aging population that has boosted market demand and growth. Indeed, from 2009 to 2014, a series of policies were promulgated by both central and provincial governments. Here, these are …
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The sickle-cell trait: A study of its distribution and effects in some Bantu tribes of South Central Africa
… advantageous one for a study of the trait in its pure form, and it is the trait, and not the anaemia, that is dealt with in this thesis. The anaemia is treated only incidentally, and I should ffiake it clear at the beginning that I can express no IL authoritative views on it.
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The sickle-cell trait: A study of its distribution and effects in some Bantu tribes of South Central Africa
… advantageous one for a study of the trait in its pure form, and it is the trait, and not the anaemia, that is dealt with in this thesis. The anaemia is treated only incidentally, and I should ffiake it clear at the beginning that I can express no IL authoritative views on it.
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Metabolites of Aspergillus versicolor
… a total of eleven metabolites were obtained in pure form. Ten of these were identified as the known compounds, sterigmatocystin, de-0-methylsterigmatocystin, 5-methoxysterigmatocystin, versicolorin A, versicolorin C, aversin, averufin, griseofulvin, dechlorogriseofulvin and 3,8- dihydroxy-6 …
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Investigations of Thioether Generation for S-D-Ribosyl-L-homocysteine Synthesis
… of the target compound in an analytically pure form, synthesis from easily obtained commodity materials, and improved understanding of each variable involved in creating the thioether bond in this molecule. One application of the thiol-ene coupling reaction generates the SRH thioether at a …
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An Architectural Follie on Monte San Giorgio
Geometry. Pure Form. What are the limits of these concepts in architecture? To what extent can they be realized through constructive means? To the architect, these concepts are often the originating forces driving their work, but their nature is intangible, and can be best understood through …
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Studies of the structure and water absorption properties of cellulosic materials by infra-red spectroscopy
… viscose, dicel and tricel films, prepared in a pure form by techniques develope d during the course of this work. These three materials provide a means of following how progressive acetylation (from 0% in viscose to 88.3% in dicel to 98.3%'in tricel) influences structure and water absorption. A …
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Permeability and swell testing of selected South African bentonites
… retention ponds etc. where it is used in its pure form and as a composite material mixed with soil. Bentonite liners are rapidly gaining interest in many other countries including Southern Africa. Bentonite is found world wide, and in South Africa (RSA) there are three deposits presently being …
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Two Autonomous Spatial Systems and Their Juxtaposition
… and their interaction: a syntactic grid and a pure formal volume. The juxtaposition of these two elements allows for insight into and exploration of their autonomous ordering potentialities, as well as the potential relationships or the presence of both systems. The syntactic grid articulates …
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Organolead Compounds in Natural Systems
… suggest that tetraethyllead is not toxic in its pure form, but that the ionic triethyllead and trimethyllead are highly toxic. Evidence is presented suggesting that triethyllead may be adsorbed onto tetraethyllead molecules both in solution and in cytoplasm, causing a reduction in overall …
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Studies directed towards the synthesis of (-)-Ebelactone-A
… and its coupling to the combined fragment BC 115 formed from the other two. We repeated the synthesis of enantiomerically enriched 20 devised by Williams, employing a Mukaiyama aldol reaction directed by Oppolzer's sultam to establish the anti-anti stereotriad of the fragment. We modelled the …
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L'nuisimk (Speaking Mi'kmaq)
… our time. The beauty of Mi’kmaq language is its pure form of fluidity and its pure connection with the culture that has returned into the hands of its true owners, the Mi’kmaq. To return the language to the people is to undo all the harm inflicted by the Government that planned to annihilate a …
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Architecture and the Transitory Experience
… thesis is a study of the act of traveling in its pure form: as a journey between two points; it is an act that requires both a point of origin and a point of destination. Yet, this study is not concerned with the logistics of either. Rather, it depends only upon the existence of these two …
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