TRINKWASSERDESINFEKTION DURCH UV-BESTRAHLUNG; ENTWICKLUNGSLÄNDER; ESCHERICHIA (MIKROBIOLOGIE); MEMBRANENZYME, MEMBRANGEBUNDENE ENZYME, ENZYMAKTIVITÄT VON BIOMEMBRANEN (MEMBRANBIOLOGIE); ATMUNGSKETTE (METABOLISMUS); ZELLTOD + ZELLDESINTEGRATION (CYTOLOGIE); DRINKING WATER DISINFECTION BY ULTRAVIOLET IRRADIATION; DEVELOPING COUNTRIES; ESCHERICHIA (MICROBIOLOGY); MEMBRANE ENZYMES, MEMBRANE BOUND ENZYMES, ENZYMATIC ACTIVITY OF BIOMEMBRANES (MEMBRANE BIOLOGY); RESPIRATORY CHAIN (METABOLISM); CELL DEATH + CELL DISINTEGRATION (CYTOLOGY)