  The properties of the nucleons in nuclear medium have been investigated in
the context of the flux tube model incorporating strangeness $(s\bar{s})$
contribution to proton structure in conformity with the experimental
indication. Proton is described as a pentaquark system with strange quark
contribution whereas neutron is described in three quark configuration. The
Quasi particle model of diquark is used to describe the structures of the
nucleons. Modifications of the properties like swelling, mass,
incompressibility, ratio of the structure functions
($\frac{F_{2}^{n}(x)}{F_{2}^{p}(x)}$), Gottfried Sum rule for nucleons in
nuclear medium have been studied and significant effects have been observed. It
has been suggested that the change of the size degree of freedom of the nucleon
in the nuclear medium plays an important role in describing the properties in
medium. The results are discussed in detail and compared with existing
experimental and theoretical predictions. Some interesting observations are
made.
