Our results suggest that the expression of HGF and c-met protein is an early event in oral carcinogenesis in Taiwan. The HGF LI in the tumor invasion front and the c-met LI in either the tumor center or invasion front can predict the progression of OSCCs in Taiwan.

Anthracene–pentiptycene hybrid systems 1‐Cn, where n refers to the number of carbon atoms in the linear alkyl chain, crystallize in three different polymorphs, denoted Y (yellow), G (green), and B (blue) forms in terms of the fluorescence color. While all Y‐form crystals show the same yellow‐to‐blue fluorescence color response to the photomechanical stress generated by the anthracene [4+4] photodimerization reaction, the four G forms exhibit distinct photomechanofluorochromism (PMFC): from green to blue for G‐1‐C4, to orange for G‐1‐C7, to red for G‐1‐C8, and to red then blue for G‐1‐C9, and the B forms show no photochromic activity. The intriguing RGB three‐color PMFC and abnormal topochemical reactivity of G‐1‐C9 are attributed to inherent softness of the crystal lattice.