Carbocations are species bearing a formal + charge on carbon. The have sp2 hybridization and trigonal planar geometry, with an empty p orbital on carbon, perpendicular to the plane containing the substituents (see diagrams shown to the right).
Aortic cross-clamp. An aortic cross-clamp is a surgical instrument used in cardiac surgery to clamp the aorta and separate the systemic circulation from the outflow of the heart. An aortic cross-clamping procedure serves, for example, in the repairing of coarctation of the aorta.
Cross-Laminated Timber (CLT) was initially developed in Europe as an alternative to stone, masonry and concrete construction. It is essentially mass timber plates made from smaller framing lumber laminated crosswise on their wide faces.North American CLT is typically laid up as three-, five-, seven-, and nine-layer panels of 2x6 lumber finger jointed lamstock.t is essentially mass timber plates made from smaller framing lumber laminated crosswise on their wide faces. North American CLT is typically laid up as three-, five-, seven-, and nine-layer panels of 2x6 lumber finger jointed lamstock.