89 uppsatser · sida 1 av 6
En studie utförd vid Stockholm Arlanda flygplats
… ways leaves the B-glycol system. The purpose of this study was to determine if degradation of propylene glycol is present in the B-glycol system and also to estimate the extent of the degradation. Propylene glycols high biological oxygen demand can cause oxygen depletion in …
… to use natural attenuation as a remediation method evidence of continuous degradation is required. Furthermore, the degradation must occur at a sufficient rate and continuous monitoring of the site is needed until the demanded levels are achieved. A field study was performed on …
This project was aimed to study the degradation of polystyrene-butadiene-styrene block copolymer (SBS). SBS is used to modify bitumen, the binder in asphalt. From earlier studies it is known that SBS degrades in bitumen, but the degradation products have not been identified. To …
… regulation systems includes the short chain fatty acids produced during feed degradation in the rumen. Starch can be digested either in the rumen where short chain fatty acids are produced or in the small intestine where glucose is the end product. Since glucose does not have …
… on the natural resources, particularly land, is the major cause of land degradation and this deterioration of land is said to have been caused by the rapid population growth, overgrazing, forest clearing as well as past government and institutional failures. In addition it is …
… in soils. Chlorinated solvents can be harmful at low concentrations. Complete degradation can only occur under specific conditions. Because of the properties of these substances, investigation and analysis methodology are extra important for determining transport and risks in a …
case study from Burkina Faso
… A global mechanism, Reduced Emissions from Deforestation and forest Degradation(REDD+) aims to help developing countries in reducing emissions from deforestation and forest degradation, and enhancement of carbon stocks. REDD+ strategies may, however exclude local forest …
Jämförelse mellan axlar med singel- respektive tvillingmontage
… of trucks with single- and dual tire axles was carried out in terms of degradation of the roads. Permanent deformation of unbound layers and fatigue cracking were investigated since these degradation mechanisms are currently used as design parameters in the design of roads. Load …
The aim of this paper was to explain protein degradation in silage and protein quality and biogenic amines in silage and their effects on the health of the dairy cows. After harvest-ing, the plant proteases degrade the proteins in the plant. The protein degrades to different …
… aircraft de-icing on the environment is due to the large oxygen demand for the degradation of glycol based de-icing fluids which are released in the environment. The effect of the increase in oxygen demand depends on where the degradation occurs in the ecosystem. In a sensitive …
… usage of agricultural fields have since the early 18th century led to a degradation of the biological diversity (Jedicke, 1994). Many environmental problems which nowadays are highlighted are connected to the modifications mentioned above. Besides the degradation of the …
… thesis project aims to investigate effects of high temperatures on engine oil degradation, with focus on the greatest degradation process: oxidation. To do this several engine runs have been performed on a 310 hp engine with EGR to see what happens to the engine oil in a real …
… these models the changes in the soil carbon pools due to changes in microbiel degradation of the organic matter can lead to both positive and negative feedback-effects. There is however a lack of consensues on the temperature respons on degradation soil organic matter. This …
… hazards are and which effect it makes on humans. It depends on many factors as degradation rate, how much it has been sprayed, the toxicity of the PPP, what protective equipment you use, how much you get in contact with surfaces that are treated and how sensitive you are to …
… to do if you, as a consumer, want to do something about the environmental degradation, or that it is a reaction to a perceived risk, due to the environmental degradation. The method chosen by the author in this thesis is a qualitative text analysis of five Swedish journals. The …
