Search for dissertations about: "N limitation"
Showing result 1 - 5 of 81 swedish dissertations containing the words N limitation.
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1. Physiology and productivity of serum-free Spodoptera frugiperda Sf9 insect cell cultures
Abstract : The objective of this study was to investigate the mechanisms and factors controlling growth and proliferation in serum-free Spodoptera frugiperda Sf9 cultures as well as the implications of these factors for protein production in the baculovirus expression system. The physiology of recently thawed, low passage (Lp) Sf9 cultures, were compared to high passage (Hp) cultures at p>100. READ MORE
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2. Lubrication mechanisms and properties of non-halogenated orthoborate ionic liquids
Abstract : One way to reduce energy consumption and waste - a necessity to achieve the UN-mandated limitation of average global temperature in-creases - is to select suitable lubricants so that energy-losses through friction and wear are minimised. In this context, non-halogenated ionicliquids (ILs) are promising candidates to achieve this aim due to their intrinsic ionic properties, low vapour pressure and high thermal stability. READ MORE
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3. Nitrogen, parasites and plants : key interactions in boreal forest ecosystems
Abstract : In the work described in this thesis I studied how increases in nitrogen (N) inputs may affect plant community structure in boreal forest understorey vegetation. These phenomena were investigated in N fertilization experiments and along a national N deposition gradient. READ MORE
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4. Biogas generation in landfills : equilibria, rates & yields
Abstract : Landfilling in "cells" has become more common in recent years. Different waste streams are guided to different cells, among which the biocell is a landfill designed for biogas production. In this thesis, the dependence of biogas generation on waste composition was investigated. READ MORE
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5. To Bee or Not to Be : Critical Floral Resources of Wild-Bees
Abstract : In recent decades, the development of strategies to prevent or slow the loss of biodiversity has become an important task for ecologists. In most terrestrial ecosystems wild-bees play a key role as pollinators of herbs, shrubs and trees. The scope of this thesis was to study 1) pollinator effectiveness of specialist bees vs. READ MORE