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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 1803 for “"Precursors"”.
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On Protein Crystal Nucleation Precursors
Protein crystallization is central to our understanding of molecular structures in biology, vital to industrial processes in the pharmaceutical industry, and increasingly appreciated as a critical block in understanding numerous disease pathologies. Although the nucleation process is critical in …
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Precursors to atmospheric blocking events
… for the duration of the blocking event. Blocking precursors, as indicators of meridional flow preceding the onset of strong Atlantic blocking episodes, have been identified by using a modified version of the Tibaldi and Molteni blocking index (1990). Hovmoller diagrams of the modified index were …
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Synthesis of taxane cyclization precursors
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Chemistry, 1997.
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Precursors to atmospheric blocking events
Atmospheric blocking events disturb synoptic-scale features from their normal eastward progression, causing anomalous weather conditions for the duration of the blocking event. The essence of blocking can be captured by variation of potential temperature ([theta]trop) on the dynamically-defined …
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SYNTHESIS OF PRECURSORS FOR MOLECULAR ELECTRONICS
The design of molecular rectifiers is one of the major topics of research in molecular electronics, however the relationship between the molecular structure and the electrical characteristics of molecular rectifiers is not fully understood. To elucidate this relationship, we synthesized and …
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Precursors for copper chemical vapor deposition
… main objective of this study was to synthesize precursors that are capable of producing copper films of high quality by chemical vapor deposition (CVD). We investigated some copper(I) and copper(II) complexes as precursors for chemical or photochemical vapor deposition. In chapter 2, we …
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Organometallic precursors for pillared clay synthesis
The synthetic hectorite, laponite has been used within the paper industry to produce mildly conducting paper for use in electrographic printing. The aim of this research was to modify laponite in order to improve the electrical conductivity. In a continuation of a previous investigation involving …
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Ribosomal Rna Precursors in Bacillus Subtilis
Made available in DSpace on 2014-12-09T22:04:17Z (GMT). No. of bitstreams: 1 6808104.pdf: 2498472 bytes, checksum: 5f7a1e2c144e81c1daf2cc700b14236e (MD5) Previous issue date: 1967
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Synthesis of labelled precursors of podophyllotoxin
… Administering various specifically labelled precursors into intact plants and tissue cultures can give a much improved insight into the lignan biogenesis. The first part of the work has been to the synthesis of two diastereotopically labelled with ²H at C-4. Desoxypodophyllotoxin is the …
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Modeling Information Precursors for Event Forecasting
… learning algorithms for modeling information precursors for use in event modeling and forecasting. Given an online stream of information (e.g., news articles, social media postings), how can we model and understand how events unfold, how they influence each other, and how they can act as …
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The attempted synthesis of precursors of tetraaryldiazoethanes
… or their precursors. The synthesis of these compounds is of importance since the carbenoid and carbonium ion decomposition of these compounds to tetraaryldiazoethanes would give formation about the nature of these intermediates.
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Production of bioplastic precursors (polyhydroxyalkanoates) from macroalgae
… interest, such as polyhydroxyalkanoates (PHAs), precursors of bioplastics, and thus contribute to reducing the impact of conventional plastics on the environment. However, due to the integral nature of the macroalgae structure, the accessibility of microorganisms to organic matter is restricted, …
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Precursors to the potent odorant wine lactone.
This thesis describes the synthesis, hydrolysis and analysis of menthiafolic acid, a precursor to wine lactone in wine. (R)-Menthiafolic acid was synthesised and then taken through acid hydrolyses to confirm its conversion to wine lactone under wine-like conditions and to determine the chirality of …
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The Chemistry of Tetraoxypersulfuranes and Their Precursors
Bis{5-(1,1-dimethylethyl)-3-(1-hydroxy-1-methylethyl)-2-mercaptobenzoato(3-)-C('2),O('1),O('3)}-(OC-6-22')-sulfur (persulfurane I), the first example of a hexacoordinate organosulfur (VI) derivative lacking fluorine ligands, a sulfone bisketal, was synthesized by treatment of bis{2-(1-hydroxy-
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Precombustion Removal of Hazardous Air Pollutant Precursors
… for 190 potentially hazardous air pollutant precursors (HAPPs). Studies have suggested that many of these HAPPs have the potential to be removed prior to combustion. This thesis details the findings of a bench-scale test program that was implemented to evaluate the capabilities of physical …
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Precursors for perylene diimide dendrimers : synthesis and photophysics
Perylene dyes are photostable and have been used in a variety of applications. However they often display aggregation effects in the solution phase, leading to concentration-dependent electroluminescent (EL) quenching, band broadening, and/or a bathochromic shift. These phenomena not only affect …
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Precursors in Gamma-ray Bursts Observed by Fermi
… GRB 130427A) and the population of GBM GRBs with precursors in their lightcurves. In a small fraction of GRBs, a dim peak appears before the much brighter peaks that are normally observed during the prompt emission. I explore whether the properties of GRBs with precursors suggests that precursors …
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Growth of Textured Mullite Fibers Using Polycrystalline Precursors
Mullite whiskers were prepared by HF leaching and templated into polycrystalline mullite fibers by extrusion. Textured growth of mullite fibers with elongated grains, aligned along the long-axis of the fibers, was achieved by heat treatment. Repeated heat treatment cycles of a whisker-templated …
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