Pumpernickel bread that came to be known as "Pumpernickel", Westphalian pumpernickel is distinguished by use of coarse rye meal and a very long baking period, which gives the bread its characteristic dark color. Like most traditional all-rye breads, pumpernickel is traditionally made with an acidic sourdough starter, which preserves dough structure by counteracting highly active rye amylases. That method is sometimes augmented or replaced in commercial baking by adding citric acid or lactic acid along with commercial yeast. Traditional German pumpernickel contains no coloring agents, instead relying on the Maillard reaction to produce its characteristic deep brown color, sweet, dark chocolate,
(What Is) Love? she was dissatisfied with the circumstances, but was in "no way dissing Lopez." A mastered version of "What Is Love?" was included on the soundtrack to "The Back-up Plan" (2010), a film in which Lopez stars. "What Is Love?" was re-titled as "(What Is) Love?" and appeared on "Love?" (2011). "(What Is) Love?" was due to be released as a promotional single from "Love?" on April 26, 2011, but was "unlocked" and released four days earlier, on April 22, 2011 by through a campaign on Lopez's Facebook page. It was released in many European countries on April 25. The song