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 9 of 9 for “"economical importance"”.
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The bio-ecology, economical importance and control of three saturniids injurious to forest trees
… ecology of these insects, so that effective and economical methods of controlling them can be devised. A further aim was to make a comparison between the potential wood loss, as a result of defoliation, and the cost of insecticidal spraying.
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Structural and kinetic studies of a copper sensor protein in Streptomyces lividans
… antifungal, enzymes and anti-tumoral agents of economical importance in Streptomyces lividans occurs during the copperdependant morphological switch step of its distinct lifecyle. However, copper can be toxic to the cell if it is not well regulated, affecting copper homeostasis. The regulation …
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Control and prevention of complicated Mycoplasma Hyopneumoniae among pigs reared in an age segregated production system
This thesis discusses two problems of increasing economical importance in modem pig production which are excess death loss and excess numbers of substandard pigs, that is, pigs which do not reach the minimal weight to assure optimal revenue. In one farm system studied, the proportion of weaned pigs …
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Unresolved Problems Involving the Hydrogeology and Sequence Stratigraphy of the Wasatch Plateau based on Mapping of the Wattis 7.5 Minute Quadrangle, Carbon and Emery Counties, Utah: Insights Gained from a New Geologic Map
… Cretaceous Interior Seaway. This area is of economical importance due to its large coal deposits, coal bed methane, and groundwater. The Wattis Quadrangle provided an ideal opportunity to test, at a small scale, the applicability of a new groundwater model for stratified mountainous terranes. …
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New techniques for the analysis of flexible operation of gas turbine based systems
… complex part-load operation is of utmost techno-economical importance. To date, main techniques used to simulate part-load operation of CCPPs were developed in the late twentieth century and are based on cumbersome and iterative methods requiring initial approximation of variables. In the wake of …
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Lake Sturgeon Biology in Rainy Lake, Minnesota and Ontario
… to the Squirrel Falls Dam, indicating the importance of this location. Telemetry data reinforced the high utilization of the Squirrel Falls area by lake sturgeon, with 37% of the re-locations occurring in that area. Squirrel Falls was the only site at which spawning was confirmed by …
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Structure and natural regeneration in iberian pine forests: implications for management = Estructura y regeneración de los pinares ibéricos: implicaciones para la gestión
… two species with a great ecological and socio-economical importance that represent some of the variability in forest typologies found in Iberian Peninsula pinewoods. Regeneration of both Scots pine and Stone pine showed a spatially autocorrelated structure under all of the silvicultural systems …
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Seismic behaviour of cable-stayed bridges : design, analysis and seismic devices
The social and economical importance of long-span bridges is extremely large; cablestayed bridges currently span distances ranging from 200 to even more than 1000 m, representing key points along infrastructure networks and requiring an outstanding knowledge of their seismic response. The objective …
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Modelos silvopascícolas en sistemas adehesados del oeste de la Península Ibérica
… system. Despite its high ecological and economical importance, there are still many unsolved questions in the ecosystem. Today, the society demands sustainability in natural resources management, and to achieve sustainable management it is necessary to fully understand ecosystem …