Citygate: A point or measuring station at which a distributing gas utility receives gas from a natural gas pipeline company or transmission system. Coke oven gas: The mixture of permanent gases produced by the carbonization of coal in a coke oven at temperatures in excess of 1,000 degrees Celsius.
Baking Sweet Potatoes. 1  Preheat oven to 400Â°F. 2  With a fork, pierce sweet potato skin 5-6 times. 3  Place on baking sheet lined with foil. 4  Bake until tender, 45 minutes to 1 hour.
According to food scientist Harold McGee, this enzyme happens to work best when the sweet potato is between 135Â°F and 170Â°F. Logically, the longer you can keep the sweet potato within this temperature range, the more starch will get converted to sugar. Steaming and boiling cook the sweet potato too quickly, but baking it in the oven at 350Â°F or lower is perfect. Sweet potatoes are done when they're soft all the way through.