sentences:  Additionally, she helped found the Seaborg Institute for Transactinium Science at LLNL in 1991 and became its first Director, serving until 1996 when she "retired" to become Senior Advisor and Charter Director.Over her career, Hoffman studied the chemical and nuclear properties of transuranium elements and confirmed the existence of seborgium.Right after finishing her doctoral work, Darleane Christian married Marvin M. Hoffman, a physicist.