Iron(II) sulfate was used in the textile industry for centuries as a dye fixative. It is used historically to blacken leather and as a constituent of ink. The preparation of sulfuric acid ('oil of vitriol') by the distillation of green vitriol (Iron(II) sulfate) has been known for at least 700 years. Together with other iron compounds, ferrous sulfate is used to fortify foods and to treat and prevent iron deficiency anemia. Constipation is a frequent and uncomfortable side effect associated with the administration of oral iron supplements. Stool softeners often are prescribed to prevent constipation. Ferrous sulfate was used in the manufacture
How Is Your Fish Today? How Is Your Fish Today? How Is Your Fish Today?, also known as Jin Tian De Yu Zen Me Yang?, is a 2007 Chinese film written by Xiaolu Guo and Hui Rao. It was directed by Xiaolu Guo. The film is a drama set in modern China, focusing on the intertwined stories of two main characters; a frustrated writer (Hui Rao) and the subject of his latest work, Lin Hao (Zijiang Yang). "How Is Your Fish Today" won 4 international awards and was well received by critics, but was not commercially successful. "How Is Your Fish Today?" was consistently given