Search for dissertations about: "Reductions"

Showing result 1 - 5 of 580 swedish dissertations containing the word Reductions.

  1. 1. Downsizing: Personnel Reductions at the Swedish Tobacco Monopoly, 1915-1939

    University dissertation from Lund University

    Author : Tobias Karlsson; [2008]
    Keywords : SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; severance pay; human capital; internal labour markets; economic history; tobacco industry; state-owned enterprises; the Swedish Tobacco Monopoly; the Swedish Tobacco Workers’ Union; gender; male-breadwinner norm; mechanization; workforce reductions; hours-reductions; layoffs; inter-war period;

    Abstract : Downsizing is a phenomenon that remarkably seldom has been the subject of historical inquiry. This study investigates how a state-owned enterprise, the Swedish Tobacco Monopoly, reduced its labour inputs because of changed consumer preferences and mechanization in the 1920s and 1930s. READ MORE

  2. 2. Catalytic Asymmetric Ketone and Alkene Reductions Using Transition Metal Complexes

    University dissertation from Uppsala : Acta Universitatis Upsaliensis

    Author : Klas Källström; Pher Andersson; Per Arvidsson; Jonathan Williams; [2006]
    Keywords : Organic chemistry; Catalytic; Asymmetric; Reductions; Ketones; Alkenes; Transition metal; Complexes; Organisk kemi;

    Abstract : This thesis contains seven papers dealing with iridium and ruthenium based catalytic asymmetric reductions, either of ketones into chiral alcohols, or olefins into chiral alkanes. The first part of the thesis describes how we have designed and evaluated new bicyclic ligands containing either N,S or N,N chelating atoms. READ MORE

  3. 3. Asymmetric Hydrogenations Syntheses of Ligands and Expansion of Substrate Scope

    University dissertation from Uppsala : Acta Universitatis Upsaliensis

    Author : Pradeep Cheruku; Pher Andesson; Jay Siegel; [2008]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Catalysis; Asymmetric; Hydrogenations; Reductions; Olefins; Imines; Enol phosphinates; Transition metal; Complexes; Iridium; Enamines; Ruthenium; Ligands; Trifluoromethyl; Diphenylvinylphosphine oxides; Vinyl phosphonates; NATURAL SCIENCES Chemistry; NATURVETENSKAP Kemi;

    Abstract : Asymmetric hydrogenation has emerged as a versatile methodology to obtain a wide range of chiral precursors. This thesis focused on the synthesis of new chiral ligands and the expansion of the substrate scope of asymmetric hydrogenations. READ MORE

  4. 4. Asymmetric Hydrogenations of Imines, Vinyl Fluorides, Enol Phosphinates and Other Alkenes Using N,P-Ligated Iridium Complexes

    University dissertation from Uppsala : Acta Universitatis Upsaliensis

    Author : Jarle Sidney Diesen; Pher G. Andersson; Kálmán J. Szabó; [2008]
    Keywords : MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Organic chemistry; Catalysis; Asymmetric; Hydrogenations; Reductions; Alkenes; Imines; Vinyl fluorides; Enolphosphinates; Transition metal; Complexes; Iridium; Organisk kemi; MEDICINE Chemistry; MEDICIN Kemi;

    Abstract : The research described in this thesis is directed toward the efficient, enantioselective synthesis of chiral products that have useful functionality. This goal was pursued through catalytic asymmetric hydrogenation, a reaction class that selectively introduces one or two stereocenters into a molecule in an atom-efficient step. READ MORE

  5. 5. Synthesis and Studies of NADH Models: Stereoselective Reductions and Host-Guest Properties

    University dissertation from Uppsala : Acta Universitatis Upsaliensis

    Author : Ulrik Gran; [2002]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; synthesis; NADH model; host-guest complex; stereoselective reductions; macrocyclic; reducing agent;

    Abstract : The aim of the project has been to synthesise macrocyclic NADH models and to study them as reducing agents and hosts. Three types of macrocyclic NADH models have been synthesised. They consist of the same subunits; a chiral unit, a nicotinamide unit and an aromatic spacer. READ MORE