missouris

FV is grateful to the MAECI and Sapienza University International Agreements for their financial support of this research. 1st, below tap water, and later in a bath of demineralized water in an ultrasonic tank for ten min. The specimens that underwent the elemental and chemical analyses have been then washed once again in demineralized water in an ultrasonic tank for five min prior to the analysis. This study adds yet another piece to the puzzle of collecting and recycling old tools. Our first extensive try to describe the many life cycles of PPF things employing functional approach shows clear guarantee...