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.
The name pina piÃ±a colada literally means strained, pineapple a reference to the freshly pressed and strained pineapple juice used in the'drink s. preparationhe name pina piÃ±a colada literally means strained, pineapple a reference to the freshly pressed and strained pineapple juice used in the'drink s. Preparation Ramon RamÃ³n portas mingot is credited with creating. The Drink Two puerto rican bartenders contest the ownership of their. national drink