The intensive use of land to produce vegetables results in high soil degradation and cultivated area. techniques resources that make production possible under unfavorable conditions can be decisive for agriculture. Thus, this study aimed evaluate the isolated joint effects liming thiamine application on development bell pepper plants. treatments consisted three different base saturation (36, 60...

In a PEMFC, feeding dry hydrogen into a dead-ended anode (DEA), reduces the overall system cost, weight and volume due to reduced need for a hydrogen-grade humidification and recirculation subsystems, but requires purging to remove the accumulated water and inert gas. Although the DEA method of operation might be undesirable due to its associated high spatial variability it provides a unique pe...

The aim of this work was to optimize an analytical method to determine residues of 21 organophosphorus pesticides of different polarities in drinking water using graphitized carbon black extraction cartridges liquid-solid and gas chromatography. The extraction was performed passing 100 mL of sample at 5 mL/min through 250 mg black graphitized carbon previously conditioned. The elution was carri...

Shale matrix permeability is an important indicator for evaluating gas transport and production. However, the effects of pore connectivity water saturation on in deep shales have not been adequately studied. In this study, Yichang area Middle Yangtze was characterized using three methods. These included determination apparent different directions via pulse-decay, also obtained Gas Research Inst...

The present research demonstrates the biological treatment of refinery sulfidic spent caustics in a continuously fed system under halo-alkaline conditions (i.e. pH 9.5; Na(+)= 0.8M). Experiments were performed in identical gas-lift bioreactors operated under aerobic conditions (80-90% saturation) at 35°C. Sulfide loading rates up to 27 mmol L(-1)day(-1) were successfully applied at a HRT of 3.5...

PURPOSE Animal studies have indicated that retinal oxygen consumption is greater in dark than light. In this study, oxygen saturation is measured in retinal vessels of healthy humans during dark and light. METHODS The oximeter consists of a fundus camera, a beam splitter, a digital camera and software, which calculates hemoglobin oxygen saturation in the retinal vessels. In the first experime...