A b st r a c t . The object of the present paper is to discuss some interesting properties of analytic functions f(z) associated with the subclasses T>(Si, S2 , S3 ' , A), 5(9, a) and Q(9, a). Also, radius problems of j f(6z) for f(z) in the class D(Si, S2 , S3 ' , A), 5(9, a) and Q(9, a) are considered.