1. FLEXIBLE INLET SYSTEM FOR ON-LINE COMPOUND-SPECIFIC δD AND δ13C ANALYSES OF NATURAL GASES. Authors: MARK HENNING, DARIUSZ STRĄPOĆ, PETER SAUER, JON FONG, ARNDT SCHIMMELMANN, MARIA MASTALERZ.2. OXYGEN AND SULFUR ISOTOPE FRACTIONATION ASSOCIATED WITH PYRITE OXIDATION BY H2O2. Authors: LILIANA LEFTICARIU, ARNDT SCHIMMELMANN, LISA M. PRATT.