Sökning: "base excess"
Visar resultat 16 - 20 av 47 avhandlingar innehållade orden base excess.
16. N-Heterocyclic Carbene-Phosphine Iridium Catalyzed Alkylation Reactions and Asymmetric Hydrogenation of Ketones
Sammanfattning : This thesis is focused on hydrogen transfer reactions using N-heterocyclic carbenephosphine iridium catalysts and is divided in two parts. The first part describes the use of achiral N-heterocyclic carbene-phosphine iridium complexes catalyzing the methylation of ketones and alkylation of amides using alcohols as the electrophile. LÄS MER
17. NHC,P- and N,P-Iridium Catalysts for Hydrogenations and Hydrogen Transfer Reactions
Sammanfattning : The work described in this thesis is focused on hydrogenation and hydrogen transfer reactions using iridium catalysts. The first part concerns the use of N-heterocyclic carbene-phosphine iridium complexes in alkylation reactions (Chapters 2 and 3) and the hydrogenation of ketones (Chapter 4). LÄS MER
18. Water chemistry and runoff in forest streams at Kloten
Sammanfattning : Natural variability of stream water composition and discharge was studied in the Kloten area, Central Sweden, by means of statistical methods and simulation technique. The effects of Urea (155 kgN ha-1) and ammonium nitrate (AN, 160 kgN ha-1) fertilization and clear-cutting were studied by comparing treated and reference streams before and after management. LÄS MER
19. Risk factors for the development of chronic renal failure : epidemiological studies on the role of analgesic use, occupational exposures and socioeconomic background
Sammanfattning : Chronic renal failure is a severe condition that reduces life expectancy and typically progresses to end-stage renal disease and a need for renal replacement therapy. In a large proportion of cases, chronic renal failure evolves from known renal or systemic diseases, but in some cases the pathogenesis remains unknown. LÄS MER
20. Some lifestyle-related factors and risk of chronic renal failure : a population-based approach
Sammanfattning : Some renal diseases, i.e. rapidly progressive glomerulonephritis, are sufficient causes of a rapid, permanent total loss of renal function. However, the majority of renal diseases progress slowly over decades, initially often without symptoms, sometimes making it difficult to define the aetiologies. LÄS MER