Timeline of the Great Recession. A recession is when a country experiences two or more quarters of contraction in their economy. GDP in the United States had averaged around 1% per quarter prior to 2007, but beginning in the fourth quarter, those numbers started to shrink.
Oligosaccharides is a general term to cover simple sugars: oligo means few, saccharide means sugar. Carbohydrates include sugars (monosaccharides and disaccharides) - which have fairly simple molecules - and more complicated molecules called polysaccharides, which are built up by condensation.
Amide or ester bond formation between an acid and, respectively, an amine or an alcohol are formally condensations. The usual esterifications are an equilibrium reaction, whereas, on mixing an amine with a carboxylic acid, an acidâbase reaction occurs first to form a stable salt.