“…Besides fatty acids of 12 [1,4,5], 14 [1,[6][7][8][9][10][11][12], 16 [6][7][8][9], and 18 [1,6,9,[13][14][15][16][17] carbon atoms, which are investigated with respect to their Langmuir isotherms and to their compression on the water surface up to the film collapse of the monolayer, also fatty acids that have odd numbers of carbon atoms, e.g. from C15 to C21 [6,[18][19][20][21][22][23], or more than 18 carbon atoms, e.g. from C20 to C24 [5][6][7]10,13,[24][25][26] have been investigated.…”