Corn remains a very important commodity in present-day America.
Heat coverts the sugar present in the kernels to starch, causing it to lose its sweetness quite quickly. Cornstarch is obtained by extracting the starch from the endosperm of the corn kernel. The cornstarch is used as a gelling or thickening agent. The germ is removed before grinding. Corn oil has a smoke point of 340F as unrefined oil, and 450F as refined oil.