Class A (type D) CpG ODNs (CpG-A ODNs) contain a central palindromic phosphodiester (PO) CpG sequence and a PS-modified 3â poly-G tail. The poly G tails form intermolecular tetrads that result in high molecular weight ordered structures.
Why does a tornado form when cold and hot air meet? The collision of warm and cold air is not the direct cause of a tornado, nor is it absolutely necessary. When a cold air mass pushes into a warm air mass (this is called a câ¦old front) the warmer, less dense air is forced upwards.
A tornado is a violently rotating column of air extending from a thunderstorm to the ground. Wind speeds can exceed 250 miles per hour. Tornadoes, although rare in Colorado Springs, are fairly common in eastern parts of El Paso County, such as Falcon and Limon. According to the National Weather Services, over 160 tornadoes were reported in El Paso County between 1995 and 2008.