PTSD can be the result of one traumatic event, or as a result of ongoing traumatic events, and may occur after an unexpected or violent death or injury to a loved one. While many people experience traumatic events in their lifetime, not all of them will go on to develop post-traumatic stress disorder.
The 3 Main Formulations of ethylene glycol coolant exist are: 1) Silicate based also known as green coolant, 2) Organic Acid Technology based commonly called OAT's, which include extended life or Dex-cool, and 3) Hybrid coolants, which is a combination of organic acid technology mixed with a low dose of silicates.
Actually the compound ,blue vitriol is a hydrated crystalline substance ,so its formula is written as CuSO4.5H2O. and its chemically known as copper(II)sulphate pentahydrate. To know more click. http://antoine.frostburg.edu/chem/senese/101/inorganic/faq/blue-vitriol.shtml.