Using Optical Methods to Study the Effect of Detergents on Elodéa canadénsis Olesya A. Trutko1, Ekaterina S. Vasilenko2, Lidia P. Timchenko2, Elena V. Timchenko1; 1 Samara National Research University, Samara, Russia; 2 MBGF Institution Lyceum "Technical" named after S.P. Korolev of the Samara City District. Samara, Russia