1 Foreground code is running, interrupts are enabled. 2  Interrupt event sends an interrupt request to the CPU. 3  After completing the current instruction(s), the CPU begins the interrupt response. 4  automatically saves current program counter. 5  automatically saves some status (depending on CPU).
Impregnator or penetrating sealers are designed to penetrate below the. surface of the stone and either deposit solid particles in the pores of the stone, or coat the individual minerals below the surface. Penetrating. sealers work by restricting water, oil and dirt from entering the stone or tile.
Graft copolymers are a special type of branched copolymer in which the side chains are structurally distinct from the main chain. The illustration (5) depicts a special case where the main chain and side chains are composed of distinct homopolymers.owever, the individual chains of a graft copolymer may be homopolymers or copolymers. Note that different copolymer sequencing is sufficient to define a structural difference, thus an A-B diblock copolymer with A-B alternating copolymer side chains is properly called a graft copolymer.