Sökning: "abiotic"
Visar resultat 36 - 40 av 228 avhandlingar innehållade ordet abiotic.
36. Functional differentiation of glycoside hydrolases family 18 in filamentous Ascomycetes
Sammanfattning : Glycoside hydrolases (GH) family 18 includes enzymes such as chitinases and endo-β–Ν-acetylglucosaminidases (ENGases). They are clustered into three distinct phylogenetic groups A, B and C, and further subdivided into several subgroups. LÄS MER
37. Low temperature olivine alteration ; an experimental approach
Sammanfattning : Water reacting with minerals to alter or dissolve them is a common phenomenon on Earth, leading to a unique chemical composition of the oceans and continents. The continuous circulation of elements and the chemical reactions between them creates the extraordinary environment prevailing on our Earth today and was probably an important requirement for the onset of life on our planet. LÄS MER
38. Ecology of fungal denitrifiers in terrestrial ecosystems : global patterns and effects of management in agricultural soils
Sammanfattning : Denitrification is the dominant source of nitrous oxide (N2O) from terrestrial ecosystems, a potent greenhouse gas and stratospheric ozone-depleting agent. Fungi can perform denitrification and terminate the process with N2O, making them a potentially important source of N2O. LÄS MER
39. Symbioses between cyanobacterial communities and feather mosses in boreal forests and consequences for dinitrogen fixation
Sammanfattning : Feather moss-cyanobacteria associations, although still poorly understood, are recognised as essential for the regulation of nitrogen (N) input into N-limited ecosystems such as boreal forests due to their ability to carry out N2-fixation. This thesis aimed to investigate the diversity and composition of feather moss-associated cyanobacterial communities, the mechanisms by which cyanobacterial colonisation on mosses occurs and the fate of the N that they fix, and how various combinations of biotic and abiotic conditions influence cyanobacterial N2-fixation activity. LÄS MER
40. Variables limiting efficacy of slow filters integrated into closed hydroponic growing systems
Sammanfattning : For sustainable production of greenhouse vegetables and ornamentals, losses of water and nutrients must be avoided. Closed hydroponic systems are highly efficient in their use of water and nutrients, produce high yields and minimise the needs for soil sterilization. LÄS MER
