Water is the most naturally abundant and widely used extinguishing substance. It extinguishes fire by cooling. There are three main types of water deluge systems, components of which are shown below. From left to right, they are: fine water spray systems, sprinkler systems, and water spray systems.
Vitamin D, a steroid hormone that influences virtually every cell in your body and has been positively linked to health conditions ranging from cancer to heart disease, may significantly boost fertility in both men and women.
Women in the study who took 4,000 IU of the vitamin daily in their second and third trimesters showed no evidence of harm, but they had half the rate of pregnancy-related complications as women who took 400 IU of vitamin D every day, says neonatologist and study co-researcher Carol L. Wagner, MD, of the Medical University of South Carolina.