Regulators usually are part of the car's alternator, although many cars, particularly older cars and modern American models, have exterior voltage regulators. Alternators or generators are used to generate power, which is fed into the car's battery to maintain a full charge.
Titanium dioxide as used in sunscreens is commonly modified with other ingredients to ensure efficacy and stability. Examples of what are known as surface modifier ingredients used for titanium dioxide include stearic acid, isostearic acid, polyhydroxystearic acid, and dimethicone/methicone copolymer.
While titanium is relatively inert, it combines with oxygen to form titanium dioxide when heated to red hot temperatures and chlorine at 550 degrees Celsius. It is the only metal known to burn in nitrogen. While relatively soft, titanium dioxide is used by manufacturers to create man-made gemstones.