Fig. 9 shows the physical appearance of the treated and untreated NRLF. Fig. 9(a) is the control sample of NRLF and the color is white, whereas the treated sample (Fig. 9(b)) is somewhat yellowish in color.
Fig. 9 shows the physical appearance of the treated and untreated NRLF. Fig. 9(a) is the control sample of NRLF andthe color is white, whereas the treated sample (Fig. 9(b)) is somewhat yellowish in color.