People Sandi Orlic, Ph.D., Rudjer Boskovic Institute, Zagreb, Croatia Sandi.Orlic@irb.hr Petra Pjevac, Ph.D., Division of Microbial Ecology, Vienna, Austria pjevac@microbial-ecology.net Tamara Markovic, Ph.D., Croatian Geological Survey, Zagreb, Croatia tmarkovic@hgi-cgs.hr Martina Sudar, Ph.D., Faculty of Chemical Engineering and Technology, Zagreb, Croatia msudar@fkit.hr Ema Kostesic, mag. ing. cheming, Rudjer Boskovic Institute, Zagreb, Croatia Ema.Kostesic@irb.hr Maja Mitrovic, mag. biol., Rudjer Boskovic Institute, Zagreb, Croatia Maja.Mitrovic@irb.hr Marija Vukovic Domanovac, Ph.D., Faculty of Chemical Engineering and Technology, Zagreb, Croatia mvukovic@pierre.fkit.hr