DEF weighs approximately 9 lbs per gallon. Compared to diesel fuel at approx 7.05 lbs and gasoline at an average of 6.19 lbs, DEF is a relatively heavy product.ow much DEF can I haul? With DEF weighing in at around 9lbs per gallon, we estimate that with a tandem axle truck tank you will be able to haul just over 3000 gallons in most states. For trailers the capacity will be around 5,000 gallons.
Key facts. 1  Depression is a common mental disorder. 2  Depression is the leading cause of disability worldwide, and is a major contributor to the overall global burden of disease. 3  More women are affected by depression than men.  At its worst, depression can lead to 1  suicide. There are effective treatments for depression.
Genetic Causes of Intellectual Disabilities. Many intellectual disabilities (ID, formerly mental retardation) are caused by genetic abnormalities. The two most common genetic causes of intellectual disabilities are Down syndrome and Fragile X syndrome.Down syndrome (or Down's syndrome in the UK). Down syndrome is the most common genetic origin of intellectual disabilities (ID, formerly mental retardation).Down syndrome occurs in 1 out of every 800 births.Down syndrome derives its name from John Langdon Down. He was the one who first pinpointed the disorder.own syndrome (or Down's syndrome in the UK). Down syndrome is the most common genetic origin of intellectual disabilities (ID, formerly mental retardation). Down syndrome occurs in 1 out of every 800 births. Down syndrome derives its name from John Langdon Down.