Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 21 for “"F700 - Science of aquatic & terrestrial environments"”.
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Environmental reviews and environmental management systems: Methodologies and organisational impacts
… the methodologies and organisational impacts of Environmental Reviews and Environmental Management Systems in Local Authorities, Universities and Conservation organisations. It assesses the practical impacts of these tools, identifies elements of good practice and discusses the organisational …
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Aluminium toxicity (with reference to Copper) in the aqueous environment and the mechanisms of its glutathione-mediated detoxification in the brine shrimp (Artemia franciscana)
… is a vital and ubiquitous component of biological systems that has been demonstrated to have a protective role against the toxicity of a wide array of xenobiotics and their metabolic by-products. It has been shown to detoxify many metals by direct and indirect mechanisms; but this is …
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Biodegradation studies of polyether polyurethane in a landfill site
… and polyethers, which are the main constituents of the polymer structure, are well known for theirstability and resistance to hydrolysis.t 32 These groups give to the foam its high hydrophobic property. This research work presents an evaluation of polyether polyurethane biodegradation based on a …
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The effect of the growth retardant Paclobutrazol on the in vitro growth and development of Betula and Populus species
The effects of the application of increasing concentrations of the growth retardant paclobutrazol (PBZ) to in vitro cultures of Populus and Betula species was studied, with a view to translating the effect into the field, and ultimately to control undesired tree growth commercially. Plant growth …
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Investigation into the toxicity and membrane interactive properties of a range of cationic photosensitisers with potential application to Photoantimicrobial Chemotherapy
The emergence of bacterial strains with resistance to traditional antibiotics has necessitated fresh approaches to the treatment of infections. In the present study, the therapeutic potential of a series of phenothiazinium based photosensitisers (PhBPs) to act as novel photodynamic antibacterial …
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Aspects of Lumbricus Terrestris L. dispersal, distribution and intraspecific interactions in field and laboratory investigations
… activities, e.g. comminution and incorporation of litter into soil, building and maintenance of soil structural porosity and aggregation, promoting changes in microbial communities and activities and influencing plant growth. Although research on earthworms is increasing rapidly, there is still …
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The effectiveness of local air pollution control in Lancashire
This thesis examines the implementation of air pollution control at the local level within the UK. Focusing upon the local air pollution control regime (LAPC) that is regulated by local authorities under the provisions of Part One of the Environmental Protection Act 1990, the research assesses …
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Cholinergic and peptidergic responses of pedal A cluster cells of the pond snail lymnaea stagnalis
… FMRFamide have been investigated in the neurones of the respiratory, locomotory and feeding systems. The aim of this investigation is to characterise the effects of ACh and FMRFamide, and candidate antagonists on Pedal A cluster cells Electrophysiological experiments were performed on the isolated …
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Changes in soil invertebrate decomposer communities during regeneration of Scots Pine within the Abernethy Forest Reserve, Scotland
Plans currently exist to extend the range of native woodland within the Scottish Highlands. The effects of such an expansion on birds, mammals and above ground invertebrates have been previously been investigated, but little consideration has been given to soil invertebrates. This research looks at …
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A study of the effects of paclobutrazol on the growth rate of fast growing tree species
… investigation was conducted into the use of growth regulators to slow the development of fast growing tree species in close proximity to overhead power lines. Four fast growing tree species were selected: Acer pseudoplatanus (Sycamore), Tilia X europea (Lime), Fraxsinus excelsior (Ash) and …
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A physiological and genetic analysis of the role of phytochrome in photoperiodic induction of flowering in Arabidopsis Thaliana
An analysis of the photoperiodic induction of flowering in Arabidopsis thaliana (L.) Heyne, Landsberg erecta ecotype, was carried out. This revealed that 4 day old seedlings, at which time the cotyledons where expanding and greening, could differentiate between a LD and a SD. At this stage the …
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Studies of aquatic micro-organisms in domestic swimming pools
… on a surface leads to the formation of a structure known as a biofllm. In this thesis attention is directed towards the attachment of microorganisms to submerged surfaces in private swimming pools Samples were taken from two private swimming pools located in West Lancashire, England. …
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Farm waste management: the effects of fine bubble aeration on cattle slurry and the fate of ammonia during the treatment process
The aim of this investigation was to study the effect of fine bubble aeration on the relative amounts of N species, specifically NH 3 and NI-I4 within cattle slurry. Research into farm waste treatment systems has mainly concentrated on pig waste, yet cattle slurry treatment presents a challenging …
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Monitoring and measuring the impacts and environmental implications of flood events on contaminated sediment dispersal in the River Swale catchment, North Yorkshire
The extraction, processing and smelting of ores has long been responsible for the release of heavy metals into the fluvial environment. As a consequence numerous studies have reported enhanced metal concentrations found in association with the sediments of rivers and in their surrounding …
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Studies on the excretion of pesticides in human milk as a means of investigating exposure and assessing the risk to infants in Indonesia
… presence and physiochemical properties of these compounds, however, monitoring the current and lifetime exposure of the population to these compounds is complex. The collection and analysis of questionnaire data from Indonesia, human milk samples from Indonesian and UK born mothers …
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The development, regulation and enforcement of water pollution law - a participatory role for individuals and environmental groups?
… and environmental groups in the present system of environmental law by focusing on water pollution law. The objectives are to ascertain whether the current law on water pollution as contained in the common law and statutory law adequately provides for public participation, whether the …
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Strategies and constraints for environmental protection in Nicaragua
… to natural and economic resources. The loss of forests and other essential eco-systems, the extinction of unique species, the degradation of soils and farmland, poverty, ill heath, exploitation and great inequalities of wealth and power remain on-going processes and essential characteristics …
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Minimisation of Energy Consumption Variance in Manufacturing through Production Schedule Manipulation
… despite the vital role it plays, the consumption of energy is rarely considered as a manufacturing process variable during the scheduling of production jobs. Due to both physical and contractual limits, the local power infrastructure can only deliver a finite amount of electrical energy at any one …
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Chromatographic Separation of Metals
… separation method employed for the separation of the bulk components of irradiated nuclear fuel (namely uranium and plutonium) from the fission products and other minor actinides produced during the fuel use. The uranium and plutonium constitutes approximately 96 % by mass of the irradiated …
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The environmental impact assessment of road schemes: with special reference to air quality in Lancashire
… as economic and social impacts. The credibility of the entire process stands on the ability of the predictive techniques to accurately predict possible impacts. This thesis examines the quality of one predictive technique, the air quality assessment of road schemes, in an attempt to identify …
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