Definition of Chronic Diarrhea Diarrhea (frequent loose bowel movements) is considered as chronic when it lasts for more than 2 weeks (1). Below is a list of main causes of chronic diarrhea with typical >> Read More ...
The spark of WW1 in Europe was the assassination of the Austria-Hungary archduke Franz Ferdinand.
Combustion (fire) was the first controlled chemical reaction discovered by humans, in the form of campfires and bonfires, and continues to be the main method to produce energy for humanity. Usually, the fuel is carbon, hydrocarbons or more complicated mixtures such as wood that contains partially oxidized hydrocarbons.