surface_chem_group with Anne and Stu_day10 surface_chem_group with Prof Chen_day10 surface_chem_presentations_group 2_day10 surface_chem_presentations_group1_day10 surface_chem_presentations_group3_day10 surface_chem_presentations_group4_day10 surface_chem_presentations_group5_day10 surface_chem_presentations_group6_day10