1 Therefore, the idea is to use a set of optimum conditions to get the most efficient yield of ammonia and this involves getting a low % yield (e.g. 8% - 15% conversion) but fast. 2  Described below are the conditions to give the most economic production of ammonia.
A Dr. Mehmet Oz, MD , Cardiology (Cardiovascular Disease), answered. The white patches caused by the skin condition vitiligo can spread to other locations or can stay in one area. The course is unpredictable and varies from person to person. Some people with vitiligo say that new patches form on skin that is under pressure or exposed to friction. This can happen from shaving or rubbing from jewelry or clothing.
Vitiligo. Vitiligo is a chronic skin disease that causes loss of pigment, resulting in irregular pale or white patches of skin. Common areas of the skin losing pigment are the face, lips, hands, arms, legs, and genital areas. Vitiligo occurs when the melanocytes die or are unable to function.he loss of melanocytes results in smooth, white patches in the middle of normally pigmented skin. Vitiligo, or leucoderma, is a common skin disorder, which is usually inherited, and can affect anyone anywhere. There are two main types of vitiligo patterns: segmental and non-segmental (generalized).