Silver segregation to \theta' (Al2Cu)-Al interfaces in Al-Cu-Ag alloys

\theta' (Al2Cu) precipitates in Al-Cu-Ag alloys were examined using high angle annular dark field scanning transmission electron microscopy (HAADF-STEM). The precipitates nucleated on dislocation loops on which assemblies of {\gamma}' (AlAg2) precipitates were present. These dislocation loops were enriched in silver prior to \theta' precipitation. Coherent, planar interfaces between the aluminium matrix and \theta' precipitates were decorated by a layer of silver of two atomic layers in thickness. It is proposed that this layer lowers the chemical component of the Al-\theta' interfacial energy. The lateral growth of the \theta' precipitates was accompanied by the extension of this silver bi-layer, resulting in the loss of silver from neighbouring \gamma' precipitates and contributing to the deterioration of the \gamma' precipitate assemblies.Comment: Pre-print. 12 pages, 7 figure

Literacy with an Attitude: Educating Working-Class Children in their Own Self-Interest By Patrick J. Finn

When Literacy with an Attitude: Educating Working-Class Children in their own Self-Interest (1999/2009) was published, Patrick J Finn framed his argument for teaching powerful literacy to poor, working-class children as a matter of justice. Powerful literacy is the education our children deserve because it fosters critical thinking about complex ideas and prepares young people to consider multiple perspectives and their own interests as they make life decisions. Finn exposed disparities in the aims and means of educating students according to their social class. Poor, working-class students received functional literacy that taught compliance, while students from privileged backgrounds were taught powerful literacy that promoted independence and leadership. The aims and means of education were distinct, separate and unequal, dispensed according to one’s social class

The Impact of Genetic and Environmental Factors on Phytonutrient Concentrations within Leafy Specialty Crops in Controlled Environments

Specialty leafy greens are excellent sources of antioxidants, vitamins, and minerals. Many of these metabolites are influenced by microclimate environmental conditions and genotype. The objective of this thesis was to measure the impacts of abiotic factors on plant growth and development along with nutritional content of specialty leafy greens in controlled environments. Chapter one looks at changes in biomass and nutritional content of different microgreen cultivars grown in a greenhouse over four growing seasons. Chapter two looks at the influence of light-emitting diode (LED) treatments on the growth and nutritional content of hydroponically grown kale. The morphology and nutritional content of hydroponically grown kale plants were significantly impacted by LED treatment. LED treatments with higher proportion of blue light had significantly shorter plants and greater fresh mass (FM) as compared to all other LED treatments. Environmental and genetic factors influenced the growth and development, as well as impacted the nutritional content of the different microgreen cultivars. Brassica microgreens had the highest FM and shortest production times throughout all seasons, as compared to the herb and lettuce microgreens. Whereas, the herb microgreens had the highest concentrations of shoot tissue carotenoids and minerals, as compared to brassica and lettuce microgreens. Results from this thesis provides valuable production data for producers who grow specialty leafy greens in controlled environments. Nutritional data among microgreen species may contribute to consumer knowledge for healthy eating choices