BIOLOGICAL EFFECTS OF HEAVY WATER

Biological effects of heavy-ion beam irradiation on cyclamen

The biological effects of heavy-ion beam irradiation on cultured tissues of cyclamen were investigated by establishing an irradiation-mediated mutation breeding protocol for producing a new variety of cyclamen. Initially, a callus, a somatic embryo, and a plantlet were irradiated with C ion beam at doses of 10, 20, 40, 60, and 80 Gy. Distinct mutants were not obtained in plants regenerated from...

Effects of heavy water (D2O) on human pancreatic tumor cells.

BACKGROUND Pancreatic cancer constitutes an entity which is difficult to treat and, therefore, mostly fatal. Since heavy water (deuterium oxide, D2O) was shown to be active in various cancer cell lines in vitro and in vivo, we now investigated its effects in human pancreatic tumor cells. MATERIALS AND METHODS The cytotoxic effects of D2O were examined in three pancreatic cancer cell lines (As...

Discovery of Interstellar Heavy Water

We report the discovery of doubly deuterated water (D2O, heavy water) in the interstellar medium. Using the James Clerk Maxwell Telescope and the Caltech Submillimeter Observatory 10 m telescope, we detected the 110–101 transition of para-D2O at 316.7998 GHz in both absorption and emission toward the protostellar binary system IRAS 16293 2422. Assuming that the D2O exists primarily in the warm ...

Pressurized Heavy Water Reactors

Which chemicals drive biological effects in wastewater and recycled water?

Removal of organic micropollutants from wastewater during secondary treatment followed by reverse osmosis and UV disinfection was evaluated by a combination of four in-vitro cell-based bioassays and chemical analysis of 299 organic compounds. Concentrations detected in recycled water were below the Australian Guidelines for Water Recycling. Thus the detected chemicals were considered not to pos...