The common thinking is that transcriptionâtranslation coupling is a means for the cell to prevent accumulation of non-functional transcripts in the cytoplasm (;), and hence that it is functionally analogous to nonsense-mediated mRNA decay that occurs in eukaryotic cells (; ;).everal co-transcriptional activities involving RNA as the substrate serve to prevent the occurrence of R-loops, and the coupling of transcription to translation in the bacteria may be seen as a special instance of such a co-transcriptional activity.
Size and Appearance. The main difference between these two types of gravel is the size of the rocks. Pea gravel, as its name implies, is small. Generally the stones are around 1/4th of an inch in diameter.They have a smooth, rounded surface and come in many different soft colors such as light blue, light red and beige. Crushed rock, on the other hand is a little bit larger in diameter around 1/2 to 1 inch.ize and Appearance. The main difference between these two types of gravel is the size of the rocks. Pea gravel, as its name implies, is small. Generally the stones are around 1/4th of an inch in diameter.
A rammer is the best choice, or for bigger jobs, a pad-foot roller (similar to a sheepsfoot roller). Lifts for compaction of cohesive soils should be no thicker than 6 inches. Granular soils only need the particles to be vibrated to move them closer together. Vibrating plates or rollers are the best choice. Lifts for gravel can be as thick as 12 inches; 10 inches for sand.