1,720,988 research outputs found
Workshop con i designer Silvana Angeletti e Daniele Ruzza - 27 Aprile 2017 - SAAD di Unicam
No full textIl workshop con i designer Silvana Angeletti e Daniele Ruzza aveva l'obiettivo di far conoscere agli studenti la loro storia di studio professionale, le loro attività, i loro progetti e le loro prospettive. In particolare, i due designer hanno mostrato lo sviluppo, dall'idea al prodotto, di numerosissimi progetti realizzati per la Guzzini, focalizzando sui punti di forza e le criticità di ogni progetto. Inoltre hanno affrontato il tema dell'importanza del rapporto tra designer ed impresa in termini di risultati d'innovazione dei prodotti
"The Wittig Synthesis of Alkenes under Gas-Liquid Phase-Transfer Catalysis
No full textUnder gas-liquid phase-transfer catalysis conditions, an aldehyde passed in the gaseous state through a solid bed of potassium carbonate and a phosphonium salt, results in the formation of an alkene which is obtained in good yield by condensation and is free from triphenylphosphine oxide, which remains adsorbed on the bed
"Phase-Transfer Catalysts Immobilized and Adsorbed on Alumina and Silica Gel
No full textOnium salts immobilized on alumina have been shown to be effective phase-transfer catalysts in comparison to analogous soluble catalysts adsorbed on silica or alumina. Appreciable selectivity has been observed in the nucleophilic substitution reaction with aqueous potassium iodide toward halide of different sizes (1-bromobutane, 1-bromooctane, and 1-bromohexadecane). Alumina and silica gel immobilized onium salts can also act very effectively as reagents when used in stoichiometric quantities. © 1982, American Chemical Society. All rights reserved
Catalytic Halide Exchange in Hydrocarbons Promoted by Aluminas Coated with Phosphonium Salts
No full textGas-Liquid Phase-Transfer Catalysis: Catalytic and Continuous Transesterificatioin Reaction
No full textGas-Liquid Phase-Transfer Catalysis of Phenyl Ethers and Sulphides with Carbonate as a Base and Carbowax as a Catalyst
No full text
Going Beyond Counting First Authors in Author Co-citation Analysis
Full text linkThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
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