Graduates from the Biological Sciences program will have demonstrated: An understanding of the tenets of modern biology and an understanding of how cellular functions are integrated from the molecular level to the cellular level, through to the level of organism, populations and functioning ecosystems.
Toxic hazard studies of flexible polyurethane foam include small scale testing and large. scale testing. The combustion modes examined include thermal decomposition, smoldering, and open flaming, and under ventilated flaming combustion. Of the small-. scale studies, only a few include smoldering foam.
PVC or vinyl is the most toxic consumer substance manufactured today. It can't be recycled, off gasses toxic fumes and has excessive contraction and expansion issues. It fades, cracks and has a maximum lifespan of 16 to 18 years. Metal clad windows are designed to allow water to seep behind the cladding. This causes early rot of the often finger jointed, new growth lumber underneath. The vinyl jamb liners that are needed for tilt-in windows have cheap spring balances and cheesy foam backing that have a lifespan of about 6 to 10 years. Double hung windows were invented in the 1400s as an air conditioning system.