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.
Build a Fog Tornado. What creates the 'tornado' part is the air created by the fan, forcing said air out of the chamber while the air from the openings on the side, forces air into the chamber. The positioning of the ventilation is critical for creating this tornado-like effect. The fog comes from the dry ice. Problem: