The influence of anoxia on carbon transport and root respiration was evaluated by applying [U-(14)C]sucrose to the foliage. Translocation patterns to the root systems of two dry edible bean genotypes (Phaseolus vulgaris L.) were examined after a 3-day exposure to aerated and nonaerated environments. Localized anoxia of root systems was simulated by growing roots in split configurations and expo...

This study describes an in situ technique allows measuring thickness of biofilm growing at liquid-liquid interface. Two probes (100μm) were used to measure the electrical conductance, the first probe penetrates the first liquid (hydrophobic liquid) then the upper surface of the formed biofilm and the later penetrates the second liquid (salt solution), then the lower surface of the biofilm. The ...

I conducted an experiment to assess the effects of aeration on the growth of bullfrog tadpoles (Rana catesbeiana). Tadpoles in the non-aerated treatment grew slower than tadpoles in the aerated treatment. Tadpoles in the nonaerated treatment were observed at the water's surface more often and on food resources less often than tadpoles in the aerated treatment. Oxygen concentrations in natural a...

In growing certain woody plants in continuously flowing culture solutions it has been found essential to submerge only a portion of the established root system while still maintaining a relatively high humidity around the unsubmerged roots. The following apparatus has been found especially satisfactory for this purpose, allowing the use of ordinary jars of glass or other material as culture ves...

The wine industry produces large quantities of wastewater that often contains high levels organic matter and nutrients, like nitrogen phosphorous. In particular, pollution can be harmful, even at low levels, since infants are vulnerable to nitrates in drinking water, excess harm the health soils waterways. Herein, an innovative compact, modular, mobile treatment wetland (TW) using cork by produ...

Comparative experiments were conducted between uniform and non-uniform stepped spillway profiles in a large-size laboratory facility. For each stepped configuration, the air concentration distributions matched the advective diffusion equation and the interfacial velocity was well correlated with a power law. A comparison of the air-water flow properties showed small differences in terms of numb...

Submerged attached growth bioreactors (SAGBs) were operated at 20 °C for 30 weeks in smart-aerated, partial nitritation ANAMMOX mode and in a timer-controlled, cyclic aeration mode. The smart-aerated SAGBs removed 48-53% of total nitrogen (TN) compared to 45% for SAGBs with timed aeration. Low dissolved oxygen concentrations and cyclic pH patterns in the smart-aerated SAGBs suggested conditions...