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
Ji (Korean name) Ji (Korean name) Ji, also spelled Jee, Chi, or Chee, is a Korean family name, as well as a popular element in Korean given names. The meaning differs based on the hanja used to write it. As a family name, Ji may be written with either of two hanja, one meaning "wisdom" (), and the other meaning "pond" (). Each has one "bon-gwan": for the family name meaning "wisdom", Pongju Village, Pongsan County, North Hwanghae in what is today North Korea, and for the family name meaning "pond", Chungju, Chungcheongbuk-do in what is today South Korea. The 2000 South Korean