1. NEW MACROCYCLES INCLUDING SPIRO-1,3-DIOXANE UNITS AS IONOPHORES FOR CATION SELECTIVE ELECTRODES. Authors: LILIANA OLENIC, GHEORGHE MIHĂILESCU, STELA PRUNEANU, ION GROSU, ELENA BOGDAN, LUMINIŢA DAVID, SIMINA DREVE.2. ALUMINA MEMBRANES USED AS MOLECULAR FILTERS FOR HUMAN RED BLOOD CELLS AND BOVINE SERUM ALBUMIN. Authors: GH. MIHĂILESCU, STELA PRUNEANU, SILVIA NEAMTU, LILIANA OLENIC.