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 and Spain Portugal was the first European country to trade in slaves from Africa, initially mainly to bring them back to Portugal (there were 32,000 African slaves in Portugal in the 16th century, working mainly in the fields and sugar plantations).ome, such as England, France and Portugal used slave labour in their colonies while others, such as the Netherlands, Norway and Denmark, were mainly active in the commercial trade and shipping, thus contributing to the trade by carrying slaves from Africa to the Caribbean and Latin America.