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The Adsorption of Radioactive Isotopes on PrecipitatesBulloch, Newman Payne 01 1900 (has links)
This thesis concerns the investigation of radioisotopes as indicators for precipitation reactions. As a precipitate forms in the presence of a radioisotope, adsorption may take place on its surface. If this adsorption changes markedly at the stoichiometric point it will be possible to use this variation as an indicator for the reaction.
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The Adsorption of Radioactive Isotopes on Specific PrecipitatesYarbrough, Kenneth N. 08 1900 (has links)
The purpose of this investigation is to reveal the effects of certain factors affecting adsorption on some specific precipitates. It is hoped that the choice of precipitate types will enable extension of the information gained here to other precipitates similar to those investigated.
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Precipitation and Pattern Formation under Far-From-Equilibrium ConditionsChen, Peng, 1960- 08 1900 (has links)
Precipitates of a series of alkaline earth metal (barium and strontium) carbonates, chromates, phosphates, and sulfates were formed at high supersaturation by diffusion through silica hydrogel, agarose hydrogel, and the freshly developed agarosesilica mixed gels. The reaction vessels could be a small test tube, a recently designed standard micro slide cassette and a enlarged supercassette. Homogeneous nucleation is thought to have taken place, and particle development led to the formation of an unusual category of materials, known as Induced Morphology Crystal Aggregates [IMCA], at high pH under far-from-equilibrium conditions. Standard procedures were developed in order to produce homogeneous gels. Particle development led to characteristic style of pattern formation, which I have called monster, spiral, and flake. Among these IMCA, barium carbonate, chromate, and sulfate were moderately easy to grow. Barium phosphate was very difficult to grow as IMCA due to formation of poorly crystalline spherulites. IMCA of strontium carbonate, chromate and sulfate could be developed at high basic pH in the presence of silicate. Strontium carbonate sheet morphology displays a unique property, double internal layer structure, which was identified by backscattering electron imaging (BEI). Selected electron diffraction (SAD) revealed a new crystal phase which was called "Dentonite". Precipitate particles were isolated using a non-destructive isolation technique. Optical microscopy was widely used to examine particles in situ and scanning electron microscopy and X-ray dispersive energy (EDX) spectroscopy were applied to particles ex situ, together with ESCA for surface analysis. Growth patterns were found to be strongly dependent on pH. Other related pattern formation processes were also investigated including normal and dendritic structures, spherulitic structures and periodic pattern formation. Some interpretations were proposed in terms of mechanism. Chemical additive effects were examined experimentally in the calcium phosphate system. The effect of external ionic strength was investigated, and it was found that a certain concentration of sodium chloride (0.2 M) approximately equals a fraction of pH unit (-0.2).
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Investigation of the underlying phenomena of precipitation in supercritical antisolvent processesObrzut, Daniel Lawrence, Duke, Steve R., Roberts, Christopher B., January 2008 (has links) (PDF)
Thesis (Ph. D.)--Auburn University, 2008. / Abstract. Vita. Includes bibliographical references (p. 132-148).
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Protein fractionation by aqueous two-phase systems and differential ammonium sulfate precipitation /Sookkumnerd, Terasut, January 2000 (has links)
Thesis (Ph. D.)--Lehigh University, 2000. / Includes vita. Includes bibliographical references (leaves 170-174).
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The action of metaphosphates in preventing the precipitation of calcium carbonate from ammoniacal solutionsReitemeier, Robert Francis, 1912- January 1938 (has links)
No description available.
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A study of dendritic precipitation, grain boundary serration formation and discontinuous precipitation in nickel base superalloysMacia, Mario Luis 05 1900 (has links)
No description available.
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Precipitation and characteristics of iron (III) oxyhydroxides from acid liquors /Jamieson, Evan John. January 1995 (has links)
Thesis (Ph. D.)--Murdoch University, 1995. / Thesis submitted to the School of Mathematical and Physical Sciences. Includes bibliographical references (leaves 274-288).
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High strength in-situ biocementation of soil by calcite precipitating locally isolated ureolytic bacteria /Al-Thawadi, Salwa M. January 2008 (has links)
Thesis (Ph.D.)--Murdoch University, 2008. / Thesis submitted to the Faculty of Sustainability Environmental and Life Sciences. Includes bibliographical references (leaves 237-251)
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The effect of certain methods of protein precipitation upon the polarimetric determination of lactose in milkAlmy, Emory Frederick, January 1929 (has links)
Thesis (Ph. D.)--Ohio state University, 1929. / Biography. Bibliography: p. [21].
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