FIGURE 12.

Details of keyword burst detection in scientific articles on anticancer natural products. The keywords “metastasis,” “immune checkpoint,” “medicinal plant,” “essential oil,” and “autophagy” maintain a large mutation intensity, and the mutation period continues to 2021. “Begin” represents the start time in keyword mutation, “End” represents the end year of the mutation, and “Strength” represents the keyword mutation strength. The larger the value, the greater is the frequency of keyword fluctuation during this time. The red area represents the time length in keyword mutation.