THE ROLE OF SCREENING CORRECTIONS IN SMALL-X-BEHAVIOR OF STRUCTURE FUNCTIONS

We consider the influence of shadowing effects on the proton structure function in the small-x interval. The gluon-gluon shadowing are notic eable in the HERA kinematical region while the screening of the quark component of the structure function effects negligibly the gluon distr ibution. The only noticeable effect is the decreasing of sea quark den sities at small-x. The explicit form of the gluon distribution in the proton depends significantly on the form of used boundary condition at Q2 = Q0(2). We consider also difference of results obtained with the help of Kuraev-Lipatov-Fadin and Altarelli-Parisi evolution equations.