Graduate bioengineer offers courses to go over the essentials in chemistry and mathematics and then advance in these subjects. * CHEMISTRY Introduction to thermodynamics and its different principles, phase equilibria with one or more constituents, complexation and precipitation reactions with shifting of the equilibrium and the theoretical creation of an electrolysis cell / battery system. Study of the various boundary conditions associated with modifications to the system. * MATHS Introduction to the various functions of recurrent use, understanding of their limits and associated transformations according to the work intervals (description of the initial conditions and at the limits). Tools to help understand functions within the framework of fixed problems (integrals, derivatives, trigonometry, etc.) with examples (ie associated with the environment - management of rains, thunderstorms, storage capacities, half-life of materials in the environment or the human body, etc.). Use of matrices and vectors, understanding of the different tools. Explanation of laws of probability, different indicators and use in basic statistics to provide a basic understanding.