In four years there were 600 commercial stations around the country. To keep up with the cost of improving equipment and paying for performers, stations turned to advertisers. In August 1922, the first radio ad, for a real estate developer, was aired in New York City. Networks of local stations developed to share programming and became big business. In 1926, RCA (Radio Corporation of America) formed the first national network, called NBC (National Broadcasting Company).
There are two types of dietary fiberâsoluble and insoluble. Soluble fiber dissolves in water and is found in a variety of fruits, vegetables, legumes, and grains. It cuts cholesterol, adds to your feeling of fullness, and slows the release of sugars from food into the blood. These actions reduce your risk for health problems including heart disease, obesity, and diabetes.
Dietary fiber is the component in food not broken down by digestive enzymes and secretions of the gastrointestinal tract. This fiber includes hemicelluloses, pectins, gums, mucilages, cellulose, (all carbohydrates) and lignin, the only non-carbohydrate component of dietary fiber.