BME 111 Midterm 1 Review

These flashcards cover key concepts from the lecture notes for BME 111 Midterm 1.

Alumina is a ceramic material made up of aluminum and __.

oxygen.

The most likely chemical formula for alumina based on valencies is __.

Al2O3.

Ionic bonding is characteristic of the chemical bonding between and in alumina.

aluminum; oxygen.

If one aluminum ion is replaced with one magnesium ion in alumina, an __ vacancy could also occur.

aluminum.

The high strength-to-weight ratio of aluminum makes it a common material in __ equipment.

healthcare.

The bond energy between aluminum and oxygen in alumina is around __ kJ/mol.

500-800.

The theoretical density of aluminum is __ than the density of alumina.

lower.

Polystyrene and polyethylene are both polymers composed entirely of and .

carbon; hydrogen.

The type of polymerization reaction that forms polystyrene from its monomer is __ polymerization.

free radical.

Syndiotactic polystyrene can achieve __ crystallinity than atactic polystyrene.

greater.

Linear polyethylene can achieve __ crystallinity than branched polyethylene.

greater.

The number average molecular weight (Mn) is calculated using the formula for __.

average molecular weight.

If an enzyme diffuses to achieve a 0.5% concentration at 100 microns from the surface, it will take __ months to diffuse 2 mm below the surface.

estimated months based on diffusion.

One approach to achieve slower enzyme diffusion in polyethylene could be to __.

modify its structure or composition.