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 is a condition in which white patches develop on the skin. Any location on the body can be affected, and most people with vitiligo have white patches in many areas of the body. 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. Although vitiligo affects all races equally, it is more noticeable in dark-skinned people.Vitiligo can cause cosmetic problems.elanin 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. Although vitiligo affects all races equally, it is more noticeable in dark-skinned people. Vitiligo can cause cosmetic problems.