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.
Causes of Vitiligo. Melanin is the pigment that gives the skin its characteristic color. Vitiligo is caused by a loss of pigment in the skin, due to destruction of pigment-forming cells known as melanocytes. The exact cause of the destruction of these cells is not known. One possible explanation might be that the body's immune system destroys the cells, as in other autoimmune conditions.
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).