Dura mater. Dura mater, or dura, is a thin membrane that is the outermost of the three layers of the meninges that surround the brain and spinal cord. It is derived from mesoderm. The other two meningeal layers are the pia mater and the arachnoid mater.ura mater. Dura mater, or dura, is a thin membrane that is the outermost of the three layers of the meninges that surround the brain and spinal cord. It is derived from mesoderm. The other two meningeal layers are the pia mater and the arachnoid mater.
The story with the most credibility is the one that, the PiÃ±a Colada was introduced on August 15, 1954 at the Caribe Hiltonâs Beachcomber Bar in San Juan, Puerto Rico by its alleged creator, Ramon âMonchitoâ Marrero.
How to Make a Virgin Pina Colada. Cool, refreshing, and a breeze to make, the piÃ±a colada is the official drink of Puerto Rico. Made with coconut cream and pineapple juice, the virgin version is just as delicious as the original. If you want to know how to make an alcohol-free version of this fruity beverage, see Step 1. 4 ounces cream of coconut.