Proteins were found to yield amino acids after enzymatic digestion or acid hydrolysis. Advances are occurring to optimize the yield of gelatin using enzymatic hydrolysis of collagen. Lipase is a digestive enzyme that catalyses the hydrolysis of lipids (fats). The hydrolysis of peptides gives amino acids. Nucleases are enzymes that cut DNA strands by catalyzing the hydrolysis of the phosphodiester bonds. Fiber may affect amylase activity and hence the rate of hydrolysis of starch. Gelatinization improves the availability of starch for amylase hydrolysis. Heating of the solution generates hydroxide ions from the hydrolysis of urea. PCB mixtures are resistant to acids, bases, oxidation, hydrolysis, and temperature change. Imines are susceptible to hydrolysis to the corresponding amine and carbonyl compound. It allows for the analysis of enzyme hydrolysis products. In this the processes of oxidation and hydrolysis are most important. Few inorganic fluorides are soluble in water without undergoing significant hydrolysis. DEG is produced by the partial hydrolysis of ethylene oxide. Invertase is a sucrase used industrially for the hydrolysis of sucrose to so-called invert sugar.