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.
Chemicals with unknown toxicity form when polypropylene plastic is heated. Reingruber, E, M Himmelsbach, C Sauer and W Buchberger. 2010. Identification of degradation products of antioxidants in polyolefins by liquid chromatography combined with atmospheric pressure photoionisation mass spectrometry. Polymer Degradation and Stability 95:740-745.