Let $X$ an hypersurface of degree $d$ and dimension $n$ in the complex projective space. This article contains two results : a) the computation of the Grothendieck algebra for topological vector bundles on $X$ ; b) the description of entire cohomology es $(c_i)\in H^{2i}(X)$ which are the Chern es of a topological vector bundle of rank $r\geq n$. The result generalizes the ical result of Schwarzenberger and Thomas on the complex projective space.