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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 20 for “"culm"”.
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The functional, ecological and evolutionary significance of culm structures in the Cape Floristic Region
The Cape Floristic Region lies in the southwestern Cape, South Africa, and is known for its high species richness and endemism. This Mediterranean-type climate region receives winter rainfall that averages between 250 and 650 mm annually over most of the region but reaches an average of more than …
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IDENTIFICATION AND CHARACTERIZATION OF GENETIC LOCI FOR CULM MORPHOLOGY TRAITS IN BARLEY (HORDEUM VULGARE L.)
… with morphology and the composition of the culm. However, limited knowledge is available on the genetic and molecular bases controlling these traits in barley. In a previous study carried out by our group, a multi-environment genome-wide association study (GWAS) on a panel of European …
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Histological and Morphological Study of Certain Culm Characteristics in Relation to Lodging of Ten Oat Varieties
Made available in DSpace on 2014-12-04T20:17:05Z (GMT). No. of bitstreams: 1 6101627.pdf: 4400485 bytes, checksum: ae99491100087811e232f1e10c596900 (MD5) Previous issue date: 1961
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The development of a methodology for the identification of potential wet grassland restoration sites in south west England
… The plant community, which is locally called Culm grassland, consists of acid purple moor grassland, soft rush meadows and wet heaths. Conservation and restoration of these grasslands requires careful planning and efficient use of resources. This study was aimed at developing strategies for …
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Rodents and Restionaceae : sex-specific plant-animal interactions in dioecious plants
… grass mouse (Rhabdomys). Mature, reproductive culms on female plants were felled down (mid way along the culm) in large numbers by Rhabdomys in order for it to access the seeds held terminally on culms. Male plants were largely unaffected due to their lack of seeds. Seeds acquired through …
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Radial and longitudinal variation of the mechanical properties of bamboo
… radial position (away from the center of the culm) and decreases with height. Tensile tests follow the trends predicted by the models. Young's modulus and strength increase with radial position (away from the center of the culm). Values for Young's modulus were in the range of 5 to 40 GPa and …
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Species limits in Cannomois virgata complex (Restionaceae)
… morphology, floral and inflorescence morphology, culm morphology and culm anatomy of the Cannomois virgata complex are described. It is shown that this variation is best expressed by recognising three main clusters: the NW-Swartberg, aledonLangeberg and Coastal. The existence of these clusters was …
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Examining Hessian fly (Mayetiola destructor) management concepts and quantifying the physiological impact of hessian fly feeding on post-vernalization selected cultivars of winter wheat in Kansas
… ‘Fuller’, and having significant losses of culm height (cm), number of spikelets/spike, number of seeds/spike, and seed weight (grams) when infested. ‘Duster’, a cultivar considered highly resistant, appeared to provide resistance to HF larval feeding in both the greenhouse and the field, …
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Aspects of coastal fynbos phenology
… paper investigates patterns of seasonal shoot or culm growth in 11 species, in relation to past and present climatic factors and seasonal nutrient availability. The results show that other factors such as root depth and extent, plant age and water-use, and soil water-holding capacity affect the …
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Mode II fracture mechanics of moso bamboo for application in novel engineering materials
… and cortex (outermost layer) of the bamboo culm in their calculations. The resulting value is, to a statistically significant degree (t = 5.0 x 10⁶), higher than that with the pith and cortex removed, as they typically will be in processing SBP. A new value, GIIc, = 630 +/- 155 J/m² , was …
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Bamboo Housing: Building with Composites for Dignity and Longevity
… for cross-laminated floor panels installed into culm-frame structure, adequate floor system bending data for design incorporation, and a cost-effective design proposal compared to bamboo disaster-relief precedence. This thesis has the potential to be built upon to the result of real-world …
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Material characterization of Guadua bamboo and the environmental feasibility of structural bamboo products
… had a mechanical advantage over raw bamboo culm and lower energy input in manufacturing but superior performance in comparison to wood composites.
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Phylogenetic and functional growth from diversification in the Cape grass genus Ehrharta Thunb
… growth form novelties (e.g. buried and swollen culm bases and annualness). These traits are interpreted to reflect divergent strategies for surviving seasonal drought (Le. via seed or storage). Much higher transpiration rates in summer-deciduous leaves than in perennating culms of two species …
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Application of the anthratube to the use of local anthracite coal
… is seriously limited when using this size. 4. Culm size, local coal cannot be burned in the Anthratube.
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Dissecting key biomass and adaptation traits of Miscanthus through genetic mapping, exploring mechanisms of cold tolerance, and flowering time in Miscanthus and Saccharum
… ratio of reproductive shoots to total number of culms was typically observed for 12.5 h or 15 h days. Latitude of origin was significantly associated with culm length, and the shorter the days, the stronger the relationship. Nearly all entries achieved maximal culm length under the 15 h …
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The structure and mechanical behavior of bamboo and bamboo products
… increasing from the inside to the outside of the culm wall. Longitudinal flexural properties (modulus of elasticity MOE and modulus of rupture MOR) and compressive strength increase with increasing sclerenchyma fiber volume fraction, indicating the mechanical importance of these fibers. The …
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Evaluation of plant growth regulators for managing fescue turf along highway rights-of-way
… leaves, 9.3% to the old leaves and 6.1% to the culm. Radioactive material concentrated in the tips of leaves. No significant accumulation of ¹⁴C occurred in the crown or roots.
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Switchgrass tolerance to cadmium: uptake and translocation
… roots, 39% for leaf blades, and 47% for shoots (culm + leaf sheath) as compared to no added Cd. At 16 mg Cd L', Cd concentration in leaf blades was 9.9 mg kg"'. The highest levels of Cd (329 mg kg^-1) were found in roots of Blackwell and Trailblazer grown at the high Cd level. In the second …
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Auspicious Generation: The Bamboo LIfe Cycle of a Chinese Cultural Center
This is an architectural thesis exploring bamboo not just as a material, but asking what the temporal nature of the material could mean for design. While bamboo is often considered sustainable because of its considerable growth rate, few really embrace the nature of bamboo. To exhibit this concept …
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Improving barley for biofuel production – efficient transformation for lignin manipulation
… phenotype. Because lignin plays a major role in culm strength and pathogen resistance, the influence of down-regulation of CAD on these features was characterised. The changed physicochemical nature of cell walls in HvCAD2 RNAi lines does not decrease the strength of the straw and does not …