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.
Results
Showing 1 to 10 of 10 for “"Passerini"”.
-
Arilglioxales en reacciones Passerini y Ugi. Síntesis de heterociclos
… el primero, “Tautomería cetoenólica en aductos Passerini y Ugi”, se hace un estudio de la tautomería y reactividad de las β-cetoamidas obtenidas en reacciones Passerini y Ugi utilizando arilglioxales como reactivos de partida, equilibrio que se ha estudiado desde el punto de vista teórico y …
-
Synthesis and biological evaluation of functionalized benzoxaboroles as potential antimicrobial agents
… Baylis-Hillman, Barbier allylation, and Passerini reaction protocols. In continuation of our interest on the development of structurally diverse benzoboroxoles, we synthesized several novel derivatives starting from 2-formylphenylboronic acid utilizing aldol reaction as the key step. Our …
-
Inaugural studies of the life history and predator/prey associations of Heringia calcarata (Loew)(Diptera: Syrphidae), a specialist predator of the woolly apple aphid, Eriosoma lanigerum (Hausmann)(Homoptera: Eriosomatidae)
… Patch, rosy apple aphid, Dysaphis plantaginea (Passerini), and woolly apple aphid. Compared with spirea aphid or rosy apple aphid, a pure diet of woolly apple aphid resulted in significantly higher larval survivorship and weight, and a significantly shorter developmental period. Naïve, neonate …
-
Sunspaces for passive building heating: calculation models and utilization of empirical data
The thesis deals with sunspaces, considered as a particular passive solar system. Solar systems exploit solar radiation in order to decrease the use of non-renewable energy sources. Therefore their importance is both environmental and economic. According to “The passive solar energy books” (1979) …
-
From order to narrative: assembling eventfulness through Bayesian chronologies. A view from the Early Bronze Age (3500-2500 BCE) South Caucasus
This dissertation addresses the impasse between absolute time and lived temporalities through a radiocarbon-based approach. I harness Bayesian chronological modeling as a theoretical and methodological intervention to reconstitute “eventfulness” from the ground up. Instead of exploring change as …
-
Optical and chemical properties of molten salt mixtures for use in high temperature power systems
A future, robust energy portfolio will include, together with fossil fuel technologies and nuclear systems, a mix of renewable energy systems. Within each type of system there will also be variants used to strengthen a nation's baseload and/or peak power requirements. Among renewable energies, …
-
Sensitivity analysis and optimization of the nuclear fuel cycle : a systematic approach
For decades, nuclear energy development was based on the expectation that recycling of the fissionable materials in the used fuel from today's light water reactors into advanced (fast) reactors would be implemented as soon as technically feasible in order to extend the nuclear fuel resources. More …
-
Measurement of optical properties of molten salts and metallic compounds for advanced solar and nuclear systems
… lower wavelengths matched the data obtained by Passerini [1]. For the longer wavelengths, the attenuation coefficient peaked around 2.5 Pm as predicted by Drotning [2]. Since certain metallic components of solar and nuclear systems are exposed to the molten salt, it is important to characterize …
-
Harnessing cheminformatics for catalyst design I. Investigation into a general, asymmetric synthesis of cinchona alkaloid analogs towards asymmetric phase transfer II. Development of an enantioselective brønsted acid catalyzed four-component Ugi reaction
… the isolated imine, to exclude the formation of Passerini byproducts. Since the Ugi reaction is traditionally catalyzed by the carboxylic acid component, the background reaction could serve as a significant problem. Optimization of the Ugi reaction occurred through a temperature and solvent …
-
I. The Reaction of Carboxylic/Thiocarboxylic Acids with Isonitriles II. Ruthenium Hydride Ring Opening of an Azetidinium Cation
… properties. It is speculated that the related Passerini reaction is affected in a similar matter, although quantitative data for this reaction are sparse in the literature. Variation of concentrations allows control over the product distribution in the reaction of carboxylic acids and …