Accurate measurement of the in vivo ammonium concentration in Saccharomyces cerevisiae (2016) Cueto-Rojas HF, Seifar RM, Ten Pierick A, Heijnen SJ, Wahl SA Journal article Detection of volatile metabolites derived from garlic (Allium sativum) in human urine (2016) Scheffler L, Sauermann Y, Heinlein A, Sharapa C, Büttner A Journal article, Original article Characterisation of the metabolites of 1,8-cineole transferred into human milk: Concentrations and ratio of enantiomers. (2013) Kirsch F, Büttner A Journal article Quantitative determination of common urinary odorants and their glucuronide conjugates in human urine. (2013) Wagenstaller M, Büttner A Journal article Quantitative determination of odorants and their glucoronide conjugates in human urine (2013) Wagenstaller M, Büttner A Journal article Characterisation of the metabolites of 1,8-cineole transferred into human milk: Concentrations and ratio of enantiomers (2013) Kirsch F, Büttner A Journal article