natural gas & oil. Duke Energy operates a system of generating plants fueled by oil or natural gas, including combustion turbines, combined-cycle units and oil-fired units. Combustion turbines. Many of our combustion turbine units are used to supplement power supply during peak demand periods when electricity use is highest.
Carbohydrates are a type of macronutrient found in many foods and beverages. Most carbohydrates are naturally occurring in plant-based foods, such as grains. Food manufacturers also add carbohydrates to processed foods in the form of starch or added sugar.Common sources of naturally occurring carbohydrates include: 1  Fruits. 2  Vegetables.3  Milk. 4  Nuts. 5  Grains. 6  Seeds. 7  Legumes.ood manufacturers also add carbohydrates to processed foods in the form of starch or added sugar. Common sources of naturally occurring carbohydrates include: 1  Fruits. 2  Vegetables. 3  Milk. 4  Nuts. 5  Grains. 6  Seeds. 7  Legumes.
Definition of Carbohydrate. Carbohydrate: One of the three nutrient compounds, along with fat and protein, used as energy sources (calories) by the body. Carbohydrates take the form of simple sugars or of more complex forms, such as starches and fiber. Complex carbohydrates come naturally from plants. Intake of complex carbohydrates, when they are substituted for saturated fat, can lower blood cholesterol. Carbohydrates produce 4 calories of energy per gram.