Enzymes are proteins that can change shape and therefore become active or inactive. An activator molecule (green pentagon) can bind to an enzyme (light green puzzle shape) and change its overall ...

Mazda has opened pre-sales for the EZ-6 electric sedan in China, which costs from $22,800. The EZ-6 is available as both a pure EV and a range extender and each has two available battery pack sizes.

This is a general chemistry course for science and engineering students. Topics include quantitative tools (measurements, precision, and accuracy), substances (formulas/names, composition, solutions, ...