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.
Portugal was the first country in the continent to abolish slavery by a bill issued on the 12 February 1761, in metropolitan Portugal and Portuguese India but not in the colonies of Brazil and Africa. France abolished slavery in 1794.lavery in African cultures was generally more like indentured servitude, although in certain parts of sub-Saharan Africa, slaves were used for human sacrifices in annual rituals, such as those rituals practiced by the denizens of Dahomey. Slaves were often not the chattel of other men, nor enslaved for life.