The removal of dissolved organic carbon (DOC) is a key factor in the control disinfection by-product (DBP) formation drinking water. Ion exchange process deals with naturally negatively charged matter. A fluidized bed column test has been chosen to parallel efficiency 4 different anionic resins (Purolite PPA860S, Dowex TAN-1, Amberlite IRA-958 and IRA-410) terms DOC fraction related DBP reducti...

After online experiments with Hf (t1/2 = 76 s, decaying into Lu) at GSI [1] we performed two experiments with the multi-column-technique [2] with Rutherfordium. Rf was produced in the Cm(O, 5n) reaction at the PSI Philips Cyclotron. A 730 μg/cm Cm target was bombarded with a 0.5 μApart O beam. The KCl aerosols transporting the activities was continuously dissolved in a degasser with a yield > 8...

• Butyl levulinate synthesis from fructose in aqueous 1-butanol is feasible at moderate temperature on ion-exchange resins. Gel-type resins with low crosslinking degree are suitable to catalyze the production of butyl D-fructose. An indicator humins formation fact that amount formic acid higher than levulinic acid. A relationship between activity and their morphology a swollen state found. The ...

Germinating cotton (Gossypium hirsutum L. cv. Deltapine 16) cotyledons developed two peaks of in vitro nitrate reductase activity; the first was stable in vitro and appeared 24 hours after imbibition; and the second, which was extremely labile in vitro, began to develop after the seedlings had emerged and developed chlorophyll. Nitrite reductase activity peaked only after the seedlings had emer...

Methyl-14C-gentamicins were prepared from incubation of Micromonospora purpurea in the presence of added methyl-'4C-L-methionine, and products with high specific radioactivity were isolated in satisfactory yields. In the previous paper1), we have shown in shake flask fermentation a high and selective incorporation of radioactivity from methyl-14C-L-methionine into gentamicins. Consequently, we ...

Floods are a consequence of extreme rainfall events. Although surface runoff generation is the origin discharge, flood research usually focuses on lowlands where impact higher. Runoff and sediment delivery at slope pedon scale receiving much less attention in effort to understand behaviour time space. This especially relevant areas where, due climatic hydrogeological conditions, streams ephemer...

Background: Due to the potential public health effects of releases of uranium to the environment, isotopic determination and measurement of this radionuclide in environmental samples is very important. Achieving this goal, monitoring programs for this radionuclide seems necessary to be applied in many countries. Materials and Methods: The uranium was separated from the water samples using anion...