Domination Related Parameters and Applications

In this chapter, we explore two graph theoretical concepts introduced by Stephen Hedetniemi as models for real-life applications. The first, Roman domination, is based on a historical account of a defense strategy used by the Roman Empire; and the second, alliances in graphs, models an agreement between two or more parties to work together for the common good

Researching teachers' thinking about education for sustainable development

This chapter draws on research on teachers' thinking to explore the 'personal practical knowledge' that can underpin successful education for sustainability in schools. It analyses both the pedagogical content knowledge and the images of self, students and society that teachers require, with a focus on the gap between the idealist theory of education for sustainability and the personal practical theories that teachers work by. The chapter concludes with a review of professional development strategies and resources available to support both pre-service and continuing in-service teacher education for sustainability

Effect of squash seed meal (Cucurbita moschata) on broiler performance, sensory meat quality, and blood lipid profile

In this experiment, 240 Cobb-500® broilers reared from1 to 49 days, and distributed according to a completely experimental randomized design with four treatments of four replicates each in order to evaluate the effect of the dietary inclusion of 0, 33, 66 or 100 g/kg of squash seed meal (SSM) (Cucurbita moschata) on the performance, carcass yield, serum lipid profile and sensory meat quality of broilers. Significant differences (p<0.05) were detected in performance, carcass weight, weight and breast yield, and leg weight. The best results were obtained with 33 and 66 g/kg as compared to the control diet and 100 g SSM /kg. Abdominal fat decreased with the inclusion of 66 and 100 g SSM / kg, but the sensory quality of breast and thighs was not affected by the inclusion of SSM. The serum levels of total cholesterol, very low density (VLDL) and low density (LDL) lipoproteins, triglycerides, glucose and atherogenic index decreased with the inclusion of 100 g/kg of SSM, except for high density lipoproteins (HDL), which increased. The inclusion of 0, 33, 66 and 100 g/kg of SSM in broiler diets, partially replacing soybean meal and vegetable oil, improved live performance and edible portions yield. In addition, abdominal fat and serum levels of harmful lipids were reduced, whereas serum levels of beneficial lipids increased. There was no effect on meat sensory quality