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.
More scientific Information: Titanium Dioxide is generally a white powder that gives products a white color. When it is made in to a very fine powder it no longer gives the product a white color. It is this fine material, sometimes called microfine or nano-sized that is used in OTC suncreen products.