Jewel Plummer Cobb was a professor of biology and zoology, and was president of California State University at Fullerton from 1981-1990.
unsullied. 1  not soiled, untarnished: an unsullied public persona. 2  virginal; pure: He wears a purity ring signifying that he will remain unsullied until marriage.
Unsealed Source. With respect to Radiation Protection , an unsealed source is is a source of Ionising Radiation in the form of Radioactive material which is not encapsulated or otherwise contained. The implication is that unsealed radioactive material can move around and if uncontrolled would lead to Contamination .