 He had shows in galleries across the country, and dozens of his pieces hang in a collection of Soviet dissident art at the Jane Voorhees Zimmerli Art Museum at Rutgers University.Some of Mr. Zhdanov's work was purely abstract, and he painted rugged, de Kooning-like portraits.But he was best known for his brooding nocturnal landscapes, which featured the moon, leafless trees and mysterious figures lurking in the gloom.