In this article we consider the
integral closure of integral domains by using the generalized transform and valuation
rings. The first section establishes the basic theory in a general setting while the
second deals with applications to graded rings, ending with a generalization of
theorems due to Kuan and Seidenberg on integral closure in Z+ graded rings. As in a
number of recent articles, we investigate the idea that if a property holds in the
graded case, and it holds for Rs= {a∕b∣a,b ∈ R,b a homogeneous non-zero divisor},
then the property holds for the ring.