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.
The Portuguese were the first to develop the transatlantic slave trade. The trade began when the Portuguese seized and exported 235 Africans from the coast of present day Senegal in 1444. Other Europeans, notably the Spanish, began trading Africans. By 1500 some 175,000 Africans had been shipped from Africa to Europe.In a short period of time, âgold feverâ was over â the attraction of African gold ended â and slavery became the boom industry.he first act against Africa by whites was often a unilateral act of war â a military invasion â with or without warning. There were no African kings or queens as guests in any of the European countries when ships set sail for Africa to capture and trade for slaves.