Coffee bean such fatty acids – 3-methyl-valeric acid (sour, green-herbaceous, unpleasant odor), acetaldehyde (pungent-nauseating odor, even when highly diluted, present in dried green coffee beans at concentrations of about 5 mg/kg), propanal (choking effect on respiratory system, penetrating-nauseating), butanal (nauseating effect, present in dried green coffee beans at 2 to 7 mg/kg), or pentanal (very repulsive nauseating effect). Coffee bean A coffee bean is a seed of the coffee plant and the source for coffee. It is the pit inside the red or purple fruit often referred to as a cherry. Just like ordinary cherries, the coffee fruit is also a so-called
Third wave of coffee other complex consumable plant-derived products such as wine, tea, and chocolate. Distinctive features of third wave coffee include direct trade coffee, high-quality beans (see specialty coffee for scale), single-origin coffee (as opposed to blends), lighter roasts, and latte art. It also includes revivals of alternative methods of coffee preparation, such as vacuum coffee and pour-over brewing devices such as the Chemex and Hario V60. The term "Third Wave" was coined in 1999 by Timothy Castle referring to a focus on quality and refers chiefly to the American phenomenon, particularly from the 1990s and continuing today, but with some effects from