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 334 for “"Environmental effects"”.
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Environmental effects on stitched RTM composites
The effects of temperature and humidity cycling on mechanical properties of AS4/3501-6 quasi-isotropic composites prepared from unstitched, Kevlar 29 stitched, and S-2 glass stitched uniweave fabric were determined. Data presented include compression strengths and compression-compression fatigue …
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FTIR studies of environmental effects on carbonmonoxymyoglobin
"In this thesis, Fourier Transform Infrared Spectroscopy (FTIR) was used to study the interaction between the protein myoglobin (Mb), and substrate carbon-monoxide (CO), as a model system of control in protein-ligand systems. IR spectra of the CO molecule bound to Mb have been obtained as a …
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FTIR studies of environmental effects on carbonmonoxymyoglobin
In this thesis, Fourier Transform Infrared Spectroscopy (FTIR) was used to study the interaction between the protein myoglobin (Mb), and substrate carbon-monoxide (CO), as a model system of control in protein-ligand systems. IR spectra of the CO molecule bound to Mb have been obtained as a function …
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Genotypic and Environmental Effects on Soybean Canopy Photosynthesis
Three studies were conducted to identify environmental and genetic factors controlling soybean (Glycine max (L.) Merr.) canopy photosynthetic CO$\sb2$-exchange rates (CER) using automatic mobile transparent chambers. In the first study, CER from chlorophyll-deficient, near-isogenic lines were …
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Taphonomic investigation into environmental effects on bone surface modifications.
… as short-term exposure to the Biostratinomic effects of weathering and diagenetic effects of the soil matrix may alter or obliterate evidence of cutmarks on bones. It examined factors that may contribute towards bone degradation and therefore, cutmark degradation. There are a lack of multi- …
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The Environmental Effects of Hydroelectric Power in Arctic Scandinavia
… to such variations. Furthermore, no direct environmental pollution is caused by a hydroelectric system, there is no fuel cost, and no consumption of natural resources that are irreplaceable and essential for other purposes. This said, in recent years, the significant adverse environmental …
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The net environmental effects of carbon dioxide reduction policies
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 1994.
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The role of accounting in handling and reporting environmental effects
… adaptability in handling and reporting environmental effects. The main purposes of the study are: firstly. to draw together the literature of environmental concern and accounting: secondly to establish whether the use of environmental accounting is practised. to ascertain whether there …
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Characterisation and environmental effects of unresolved complex mixtures of hydrocarbons
… of hydrocarbons, as well as their possible effects on the environment, is described. An aliphatic hydrocarbon UCM isolated from the base oil of Silkolene 150 lubricating oil was characterised by a combination of micro vacuum-distillation and oxidative degradation. Vacuum-distillation …
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Environmental Effects on the Reproductive Ecology of a Passerine Bird
I found no differences among habitats in the proportion of feeding and foraging performed by males, and little response to experimental manipulations of food supply and nest predation risk. Males did not differ in their proportion of feeding to male- and female-biased broods, but contributed …
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Environmental effects on the fatigue behavior of copper nickel alloys
… were made with oxygen or humid air. The environmental effects (helium as the base case} in the Mode I tests in gaseous environments were manifested in the form of shorter fatigue lives, easier crack initiation, marginally higher crack growth rates and the development of intergranular …
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Pit initiation on passivated metal surfaces: crystallographic orientation and environmental effects
… solutions than in bromide solutions. The effects of the solution pH, the presence of buffers, and halide ion species on the pitting of polycrystalline nickel were investigated in 1.0 M halide solutions. It was found that the critical pitting potential (Ecp) was independent of the pH of …
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Genetic Environmental Effects on Silage Productivity of Corn (Zea mays L.)
… with assessment of a variety of genetic and environmental factors. Two corn hybrids were planted bimonthly for 2 years using 6 different population densities, ranging from 50,000 to 200,000 plants/ha. The optimum population density for silage yield was 167,000 plants/ha, but for grain was …
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Modelling environmental effects on fracture damage of natural fibre-reinforced polymer composites
… polyester composite subjected to environmental ageing conditions has been studied with the aim of modelling its effect on the composite fracture damage for the purpose of long-term performance prediction. The composite was accelerated aged by hydrothermal ageing by immersing test …
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Modelling environmental effects on fracture damage of natural fibre-reinforced polymer composites
… polyester composite subjected to environmental ageing conditions has been studied with the aim of modelling its effect on the composite fracture damage for the purpose of long-term performance prediction. The composite was accelerated aged by hydrothermal ageing by immersing test …
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INDIVIDUAL AND ENVIRONMENTAL EFFECTS ON LIFE HISTORY TRAIT EXPRESSION IN NAZCA BOOBIES
… may interact to determine breeding responses to environmental change. Young and old Nazca booby females had lower performance than middle-age birds for all reproductive traits, and these age effects sometimes increased under a challenging environment. Environmental quality was assessed with …
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Post-natal environmental effects on behaviour in the zebra finch (Taeniopygia guttata)
… adult, there is currently great interest in how environmental variability may shape the behavioural phenotype, and whether such shaping has adaptive benefits. It is clear for example that the developmental environment will have immediate effects on an animal in terms of its survival and …
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The economic and environmental effects of local bus service deregulation in Britain
… (excluding London). Second, to identify the effects of deregulation if external subsidy to the bus industry had not been reduced. Third, to estimate a number of the externalities, particularly the environmental effects, associated with substitution of bus for car travel.<br/><br/>Criticism of …
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Environmental effects on the rate of electron transfer in mixed-valence molecules
… IT band characteristics. It was shown that these effects resulted from the formation of ion aggregates in solution. With the formation of ion aggregates in solution (which perturbs the environment about the mixed-valence cation), the applicability of the Marcus, Hush, and PKS methods of analysis …
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