root tissue
2.74-1 trifloliate orange, Purpelflowered Ichang Papda, Rusk citrange,Yuzu, Troyer citrange, Jiangnangan mandarin, No. 92 tangerine and Xiecheng yuzu. Four per-selected dwarfing indices: percetage of root bark, total area of root trachea, palisade tissue/ sponge tissue ratio, stoma desity, and 4 auxiliarilly preselected indices: percentage of cortex, percentage of xylem, trachea density in the root, trachea number in the main vein of the leaf, were screened.
7.In 1997 the FDA approved lasers that remove tooth decay and earlier this year gave the thumbs up to laser treatments for root canals and other hard-tissue procedures.
