Trung Nguyên then passed through its digestive tract. After gathering, thorough washing, sun drying, light roasting, and brewing, these beans yield an aromatic coffee with much less bitterness. Trung Nguyên's Legendee brand coffee is a simulated kopi luwak product, which uses synthetic enzymes to mimic the civet's gastric acid, producing effects on flavour similar to actual kopi luwak, and reducing the need to rely on the civet, which is now endangered in Vietnam due to excessive hunting. In August 2010, Trung Nguyên CEO Dang Le Nguyen Vu reported that the company had begun manually producing its own natural (non-simulated) kopi luwak under
Cellular waste product as well as by cells called anaerobes that selectively perform anaerobic respiration even in the presence of oxygen. In anaerobic respiration, weak oxidants like sulfate and nitrate serve as oxidants in the place of oxygen. Generally, in anaerobic respiration sugars are broken down into carbon dioxide and other waste products that are dictated by the oxidant the cell uses. Whereas in aerobic respiration the oxidant is always oxygen, in anaerobic respiration it varies. Each oxidant produces a different waste product, such as nitrite, succinate, sulfide, methane, and acetate. Anaerobic respiration is correspondingly less efficient than aerobic respiration. In the absence