Tetanus vaccine can help prevent tetanus disease, commonly known as lockjaw.. Tetanus is a serious disease that causes painful tightening of the muscles, usually all over the body. It can lead to locking of the jaw so the person cannot open his mouth or swallow. Tetanus leads to death in about one in ten cases.
The most abundant dissolved salt in ocean water is sodium chloride. It is a colorless crystalline compound with the chemical formula of NaCl.
Of these sodium chloride accounts for 77.8%. The presence of salts in ocean water causes salinity, which is known as the salinity of ocean water. Salinity is expressed by the amount of salts dissolved. The technical term for saltiness in the ocean is salinity. In oceanography, it has been traditional to express salinity not as percent, but as parts per thousand (â°), which is approximately grams of salt per kilogram of solution.