Shine Medical Technologies said Tuesday that it has selected Janesville as the location for a new medical isotope plant that's expected to create more than 100 jobs by 2015.Shine is a Middleton-based firm that supplies medical isotopes and cancer treatment elements. The company said the new plant will enable it to become the first large-scale domestic supplier of molybdenum-99, a medical isotope that is used in more than 30 different diagnostic imaging procedures.