1. Agrosphere Institute, Institute of Chemistry and Dynamics of the Geosphere; Forschungszentrum Jülich; Jülich Germany
2. Earth and Life Institute- Environmental Sciences, Université Catholique de Louvain; Louvain-la-Neuve Belgium
3. USDA-ARS; Environmental Microbial and Food Safety Lab.; Beltsville MD
4. Dep. of Soil, Water and Environmental Science; Univ. of Arizona; Tucson AZ
5. Dep. of Mechanical Engineering; Federal Univ. of Rio de Janeiro; RJ Brazil