Sökning: "reduction"
Visar resultat 21 - 25 av 5720 avhandlingar innehållade ordet reduction.
21. Obesity, weight reduction treatment and IVF
Sammanfattning : Background: Obesity is a growing problem on a global scale and women with obesity have a higher risk for infertility and complications, for both mother and child, in pregnancy and birth. This has been shown both regarding spontaneous pregnancy and in vitro fertilization (IVF). LÄS MER
22. Theoretical Studies on CO2 Reduction Electrocatalysts
Sammanfattning : The atmospheric CO2 concentration has increased by more than 20% since 1980s and has now reached the highest level than at any point in the past 800 000 years. Electrochemical CO2 reductions are receiving particular in- terest as the apparatus are relatively easy to maintain and cheap to operate. LÄS MER
23. Samarium(II)-mediated Reactions in Organic Synthesis - Method Development and Mechanistic Investigation
Sammanfattning : This thesis describes the development of methods using divalent samarium reagents in organic synthesis. The main focus is placed on functional group reductions, but reductive formation of carbon-carbon bonds has also been investigated. LÄS MER
24. Nonlinear System Identification and Control Applied to Selective Catalytic Reduction Systems
Sammanfattning : The stringent regulations of emission levels from heavy duty vehicles create a demand for new methods for reducing harmful emissions from diesel engines. This thesis deals with the modelling of the nitrogen oxide (NOx) emissions from heavy duty vehicles using a selective catalyst as an aftertreatment system, utilising ammonia (NH3) for its reduction. LÄS MER
25. On Fluid Power Pump and Motor Design : Tools for Noise Reduction
Sammanfattning : Noise and vibration are two of the main drawbacks with fluid power systems. The increasing requirements concerning working environment as well as machines' impact on surroundings put components and systems to harder tests. The surrounding machines, e.g. LÄS MER