Many people believe that slabs on ground typically should have some reinforcing, but most slabs in North America are unreinforced concrete and perform well. If reinforcing is utilized, the amount that should be used depends on what is to be accomplished.
Micelles are lipid molecules that arrange themselves in a spherical form in aqueous solutions. The formation of a micelle is a response to the amphipathic nature of fatty acids, meaning that they contain both hydrophilic regions (polar head groups) as well as hydrophobic regions (the long hydrophobic chain). Micelles contain polar head groups that usually form the outside as the surface of micelles.
Micelles in the body allows for the absorption of molecules that are insoluble in water such as lipids. They also carry lipid soluble vitamins to the small intestine. Micelles usually form in detergents as their primary function is to absorb these lipids by inserting long hydrophobic tails from the soap into the lipids/fats, while the hydrophilic heads face the non polar molecules allowing for the emulsion of the lipids.