Trung Nguyên its "Weasel" sub-brand. Due to the complicated production process, only 40–50 kg of "Weasel" coffee are produced annually. It is much more expensive than any of the company's other products: a 1 kg bag of "Weasel" coffee costs $3,000, six times higher than Indonesian kopi luwak. Dang has claimed, however, that Trung Nguyên's Vietnamese version is of higher quality, since production depends on wild or free range civets who choose the best coffee beans themselves, instead of being caged and force-fed. Currently, Trung Nguyen owns the system of four factories: Along with producing and processing coffee beans, Trung Nguyên operates
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