Learn more: Angina is chest pain or discomfort caused when your heart muscle doesn't get enough oxygen-rich blood. It may feel like pressure or squeezing in your chest. The discomfort also can occur in your shoulders, arms, neck, jaw, or back.Angina pain may even feel like indigestion.But, angina is not a disease.earn more: Angina is chest pain or discomfort caused when your heart muscle doesn't get enough oxygen-rich blood. It may feel like pressure or squeezing in your chest. The discomfort also can occur in your shoulders, arms, neck, jaw, or back. Angina pain may even feel like indigestion.
Definition of leaven. 1a : a substance (such as yeast) used to produce fermentation in dough or a liquid; especially : sourdoughb : a material (such as baking powder) used to produce a gas that lightens dough or batter.
Leavening gases are responsible for the volume in most baked food products; to leaven means to make light; to raise. They are responsible for expanding the air bubbles that have been mixed, creamed, kneaded or whipped into the batter or dough. Leaveners also contribute to baked goods' taste, coloring and texture. THE FOUR BASIC LEAVENING GASES: The basic leavening gases commonly found in baking recipes are: air; water vapor or steam; carbon dioxide; and biological. In baking recipes, one or more leavening agents participate in the leavening process. However, chemical leaveners and yeast usually are not combined, but there are some recipe exceptions. In some frozen or refrigerated dough found in the grocery store, yeast and chemical leavenings complement each other.