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 1760 for “"Alteration"”.
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Antarctic Alteration of Meteorites
… of the meteorites have undergone considerable alteration. Understanding the paths of alteration allows reconstruction of original features, but additionally it gives a unique opportunity to examine a natural laboratory of cold, water-restricted alteration environments similar to those on Mars …
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Alteration of hydroxyhopanone in sediments
Includes bibliographical references.
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Basalt alteration and its consequences
… explores the geochemical consequences of basalt alteration in three distinct Earth environments using reactive transport modelling coupled to geochemical analyses. The weathering of basalt creates unique chemical environments that can drive carbonate mineral precipitation and other secondary …
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Formation and alteration of magnetite nanoparticles
… step. Furthermore, a study of the alteration of magnetite particles of different sizes as a function of their storage conditions is presented. The magnetic properties depend not only on particle size but also depend on the structure of the oxide, because magnetite oxidizes to …
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Alteration of dioctahedral micas in soils
… conditions, the basic mechanism of mica alteration apparently was similar. The soil micas altered easily in the laboratory compared to an Ontario muscovite. Thus, it was concluded that soil micas are quite different from the specimen-type micas. They may possess a lower charge or lack the …
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Alteration of bone metabolism in OLETF rat
… with osteoblast activity. We tried to distinct alteration of bone metabolism in OLETF rat from 8wks to 52wks. Animals and treatment: Serum samples were collected in eleven male OLETF and LETO (control) rats, femoral BMD and percent body fat were measured in 8, 25, 40, 52wks of age. In 25wks of …
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Flood hazard alteration and natural catastrophe insurance
Submission original under an indefinite embargo labeled 'Open Access'. The submission was exported from vireo on 2022-11-11 without embargo terms
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Selected skeletal alteration to improve beef tenderness
A pre rigor cut was made through the 12th thoracic vertebrae of one side of a beef carcass, while the other side, processed conventionally, served as the control. The effect of this cut upon yield grade, sensory attributes and tenderness of Longissimus steaks was determined. The treatment caused no …
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The hydrothermal alteration of oceanic basalts by seawater
… changes that result from hyrdrothennal alteration, and to assess the chemical fluxes that result from these reactions in terms of their possible significance in elemental geochemical budgets as potential sources and sinks for elements in seawater. Where possible, pillow basalts were …
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Biogeochemical Alteration of Particulate Pyrogenic Organic Carbon (pyC)
<p>The resistance of plant derived pyrogenic organic carbon (<em>py</em>C) to abiotic and biotic means of degradation has led to increased interest in the role of <em>py</em>C as a potential carbon sink, as well as a strategy for sequestering atmospheric CO2 to mitigate excess carbon emissions. …
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The hydrothermal alteration of oceanic basalts by seawater.
Thesis. 1977. Ph.D.--Massachusetts Institute of Technology. Dept. of Earth and Planetary Sciences.
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Biochemical alteration of gravesoils between season and soil type
Decomposition chemistry refers to the biochemical degradation processes which occur in soft tissue as decomposition proceeds. This study aims to investigate the relationship between the release of decomposition fluids into contrasting soil environments and their potential correlation with the …
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Mineralization and Wall Rock Alteration Flin Flon area, Saskatchewan
… solutions. Metallic mineralization and wall rock alteration took place at intermediate to high temperatures and is related in age to the granodiorite or the Kaminis granite. The type of wall rock alteration accompanying the mineralisation depends on the nature of the hydrothermal solutions and on …
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Perceptions of Cosmetic Alteration in Different Sized Attractive Women.
<p>Two experimental phases examined the characteristics impacting the physical attractiveness stereotype and a potential stereotype shift. From reading a description of a hypothetical target, Phase 1 of this study revealed that participants considered an overweight attractive woman significantly …
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The Alteration of Thyroid Hormone Level during Liver Transplantation
"배경: 비갑상선질환 증후군은 triiodothyronine (T3)치가 단독으로 저하되어 있거나 T3 와 tyroxine (T4)치가 같이 저하되어있는 것이 특징이다. 이는 기아, 패혈증, 심근경색, 심장 혹은 비 심장수술 환자에서 관찰 되며, 어떤 심한 질병과도 동반될 수 있다. 원인은 명확히 알려져 있지 않으나, interleukine-6 (IL-6), tumor necrosis factor-a (TNF-a)와 같은 cytokines가 요소 중 하나로 제시되고 있다. 간이식수술은 cytokines의 급격한 변화를 겪는 …
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Wall rock alteration accompanying Canadian Pre-Cambrian gold mineralization
Thesis: Ph. D., Massachusetts Institute of Technology, Department of Geology, 1935
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Ultramafic Alteration and the Cooling of Earth and Mars
… composition. My second chapter argues that the alteration of these Martian ultramafic rocks was fundamental in the cooling of the planet from a habitable surface with liquid water to a cold and icy planet, largely devoid of an atmosphere. I show that the same high-surface-area clay minerals …
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