The board of directors of Ciba Specialty Chemicals has appointed Eric Marohn global head of the textile effects segment and member of the executive committee. Mr. Marohn joined Ciba in 1988 and has substantial international experience. In his last position, he headed marketing and sales for the textile effects segment in North and South America.      Christoph Biedermann takes over a new role within the executive committee and will lead the group service international coordination and human r...