Search for: [Subject and Keywords = biotechnology] OR [Subject and Keywords = biotechnologia] OR [Title = Review of a state of know\-how on the biochemical changes of mineral nitrogen during waste water treatment process] OR [Title = Przegląd stanu wiedzy w zakresie biochemicznych przemian azotu w procesie oczyszczania ścieków] OR [Creator = Podedworna, Jolanta] OR [Creator = Żubrowska\-Sudol, Monika]