  The spectral sequence constructed by V.A.Vassiliev computes the homology of
the spaces of non-compact knots in ${\bf R}^d$, $d\ge 3$. In this work the
first term of this spectral sequence is described in terms of the homology of
the Hochschild complex for the Poisson algebras operad, if d is odd (resp. for
the Gerstenhaber algebras operads, if d is even). In particular the bialgebra
of chord diagrams arises as some subspace of this homology (in this case d=3).
Also a simplification for the calculation of the Vassiliev spectral sequence in
the first term is provided.
