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 11 of 11 for “"coniferous trees"”.
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Previsual detection of stressed coniferous trees
The study consisted of two parts: following the fade rates of killed field-grown Virginia pine (<u>Pinus virginiana</u> Mill.); and to study the effects of different stresses on seedlings. Foliage fade rates of killed field-grown Virginia pine varied with the time of the year the tree was killed. …
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Improving the Phylogenetic Understanding of the Genus Juniperus
… and geographically widespread genus of coniferous trees and shrubs. The genus is relatively recently diverged, and has experienced periods of rapid diversification. Recent phylogenetic investigations by others have compared DNA from selected regions of the chloroplast, but the resulting …
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Characterization and preservation techniques of plant xylem as low cost membrane filtration devices
… to show that plant xylem from the sapwood of coniferous trees is capable of rejecting 99.99% of bacteria from feed solutions.16 Additionally, 4 L/d of water can be filtered with a ~ 1 cm² filter area using a transmembrane pressure of 5 psi, an amount sufficient to meet the drinking needs of …
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Identification and evaluation of techniques for quality control of low-cost xylem filters
… membrane filter produced from the xylem of coniferous trees. Due to xylem structure variation and the potential for improper filter processing during mass production, quality control protocols are a necessity. Manufacturers must ensure xylem filters are functional in terms of microbial …
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Biosynthesis and function of glucuronic acid substitution patterns on softwood xylan
Wood from coniferous trees is an important source of renewable biomass. It can contribute to provision of carbon neutral energy, biomaterials and housing for a growing population. Softwood is mainly composed of cellulose, galactoglucomannan, xylan and lignin. This thesis focuses on the biosynthesis …
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The Asian Tiger Mosquito (Aedes albopictus): Spatial, Ecological, and Human Implications in Southeast Virginia
… that can hold water, and yards that contain coniferous trees versus deciduous trees. The primary socio-economic variables that can signify an environment with high A. albopictus activity are: lower house value and median rent value, lower levels of education, and a lower median income level. …
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Characterization of the White-rot Fungus, Phanerochaete carnosa, through Proteomic Methods and Compositional Analysis of Decayed Wood FibreCharacterization of the White-rot Fungus, Phanerochaete carnosa, through Proteomic Methods and Compositional Analysis of Decayed Wood Fibre
… was isolated almost exclusively from fallen coniferous trees (softwood). While several studies describe the lignocellulolytic activity of the hardwood-degrading, model white-rot fungus Phanerochaete chrysosporium, the lignocellulolytic activity of P. carnosa has not been investigated. An …
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The Relationship between Wildfire Dynamics and Soil Carbon in Boreal Forests of Alaska: Forest Management for Emissions Reduction in a Changing Climate
… a greater dominance by deciduous rather than coniferous trees, a development that is increasing soil carbon levels as these stands mature. Human suppression policies, despite being well intentioned, are driving more frequent and severe fires due to an unnatural buildup of fuels, especially …
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Carbon Accumulation Rates Over the Holocene in Flow Country Peatlands and the Direct Comparison of Open and Afforested Peatland Carbon Stocks Using Tephrochronology
… peatlands has been drained and afforested with coniferous trees. While it is recognised that this may be a threat to the long-term carbon reserves stored in afforested peatland, there are very few studies measuring the effects of afforestation on the carbon balance of naturally open, nutrient …
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Microbial diversity and activity in temperate forest and grassland ecosystems
… Luxembourg covered each by several deciduous or coniferous tree species (Fagus sylvatica L., Quercus petraea (Mattuschka) Lieblein, Picea abies (L.) Karst, Pseudotsuga menziesii (Mirbel) Franco). We investigated the influence of these tree species on microbial processes (chapter 5) related to C …