The renin molecule contains both hydrophobic and hydrophilic amino acids. Hydrophobic molecules in the mobile phase tend to adsorb to the relatively hydrophobic stationary phase. A liposome can be hence loaded with hydrophobic and/or hydrophilic molecules. Amphiphiles are molecules that have both hydrophobic and hydrophilic domains. Froth flotation is a process for selectively separating hydrophobic materials from hydrophilic. This makes them amphiphilic molecules (having both hydrophobic and hydrophilic portions). The extent of the hydrophobic and hydrophilic portions determines the extent of partitioning. This method resulted in a particle with equal hydrophilic and hydrophobic areas. Rubber particles are surrounded by a single phospholipid membrane with hydrophobic tails pointed inward. Polymer insulators by nature have hydrophobic characteristics providing for improved wet performance. Phytosterols are hydrophobic and soluble in alcohols. Serum albumin contains eleven distinct binding domains for hydrophobic compounds. Grayanotoxins are low molecular weight hydrophobic compounds. FTIR is used to investigate proteins in hydrophobic membrane environments. Oil is any of a number of nonpolar, hydrophobic, and viscous liquids.