Composition H6 is a castable military explosive compound composed of the following percentages by weight: 45% RDX 30% TNT 20% powdered aluminium 5% paraffin wax as a phlegmatizing agent. Another (very similar) version of H6 has the following proportions: RDX 45.1 %, Trinitrotoluene 29.2 %, powdered Aluminium 21 % and 4.7% paraffin wax & Lecithin.
The retinal nerve fiber layer (nerve fibre layer, stratum opticum, RNFL) is formed by the expansion of the fibers of the optic nerve; it is thickest near the porus opticus, gradually diminishing toward the ora serrata. As the nerve fibers pass through the lamina cribrosa sclerae they lose their medullary sheaths and are continued onward through the choroid and retina as simple axis-cylinders.
Jan Davidsz. de Heem or in-full Jan Davidszoon de Heem, also called Johannes de Heem or Johannes van Antwerpen (ca. April 17, 1606, Utrecht – before April 26, 1684, Antwerp), was a still life painter who was active in Utrecht and Antwerp. He is a major representative of that genre in both Dutch and Flemish Baroque painting.