Presence of certain type of bacteria in intestinal tract can also affect the color of human stools. Salmonella, a type of bacteria, if enters in human intestine or digestive tract, could disturb its functioning and result in change in color of stools. This could be easily treated with antibiotics.
Many critics have suggested that there is no clear distinction between realism and its related late nineteenth-century movement, naturalism. As Donald Pizer notes in his introduction to The Cambridge Companion to American Realism and Naturalism: Howells to London, the term realism is difficult to define, in part because it is used differently in European contexts than in American literature.
Neoclassicism (Encyclopaedia Britannica) Neoclassicism was a widespread and influential movement in painting and the other visual arts that began in the 1760s, reached its height in the 1780s and '90s, and lasted until the 1840s and '50s.ther outstanding artists of that period were Aleksey Venetsianov and Pavel Fedotov, the forerunners of Realist painting in Russia. The second half of the 19th century saw the maturing of Realism in Russia.