Dietary fiber or roughage is the indigestible portion of food derived from plants. It has two main components: 1  Soluble fiber, which dissolves in water, is readily fermented in the colon into gases and physiologically active byproducts, and can be prebiotic and viscous.ietary fiber or roughage is the indigestible portion of food derived from plants. It has two main components: 1  Soluble fiber, which dissolves in water, is readily fermented in the colon into gases and physiologically active byproducts, and can be prebiotic and viscous.
The Portuguese were the first to engage in the New World slave trade in the 16th century. Between 1418 and the 1470s, the Portuguese launched a series of exploratory expeditions that remapped the oceans south of Portugal, charting new territories that one explorer described as oceans where none have ever sailed before.
African slavery began in North America in 1619 at Jamestown, Virginia. The first American-built slave ship, Desire, launched from Massachusetts in 1636, beginning the slave trade between Britainâs American colonies and Africa. From the beginning, some white colonists were uncomfortable with the notion of slavery.frican slavery began in North America in 1619 at Jamestown, Virginia. The first American-built slave ship, Desire, launched from Massachusetts in 1636, beginning the slave trade between Britainâs American colonies and Africa. From the beginning, some white colonists were uncomfortable with the notion of slavery.