Today the average age of the nation's nuclear workers is about 50. Many will be eligible to start retirement at 55. Within five years, about 35 percent of the specialists who have been running U.S. nuclear plants for the past quarter-century -- about 19,600 people -- are expected to begin a mass retirement.
How many different kinds of amino acids make up proteins?: 20 259. How many hydrogen atoms are attached to each carbon adjacent to a double bond?: 1 260. How many minerals are known to be required in the diet of human beings?: 16 261. How many subgroups comprise the vegetable food group?: 5 262. How many vitamins are known to be required in the diet of human beings?: 13 263. If a group of people consumed an amount of protein equal to the average requirement for their population group, what percentage would receive insufficient amounts?: 50 264.
Vitamins are a group of substances that are needed for normal cell function, growth, and development. There are 13 essential vitamins. This means that these vitamins are required for the body to work properly. They are: