The degradation of seven compounds which are usually recalcitrant in classical activated sludge treatment (e.g., diclofenac, propranolol, iopromide, iohexol, iomeprol tebuconazole and propiconazole) was studied in a biofilm reactor (slow sand filtration). This reactor was used to treat real effluent-wastewater at different flow rates (hydraulic loadings) under aerobic conditions so removal and ...

Interfacial morphologies during Cu wafer bonding at bonding temperatures of 300°C to 400°C for 30 min followed by an optional 30 or 60 min nitrogen anneal were investigated by means of transmission electron microscopy. Results showed that increased bonding temperature or increased annealing duration improved the bonding quality. Wafers bonded at 400°C for 30 min followed by nitrogen annealing a...

BACKGROUND AND PURPOSE Our aim was to evaluate whether increasing iodine concentration, at a constant total iodine dose, resulted in better brain tissue opacification in patients with acute stroke symptoms during their evaluation by first-pass CT perfusion (CTP). MATERIALS AND METHODS One hundred two patients presenting to the emergency department within 3 hours of onset of acute stroke sympt...

Thermal decomposition of cocoa pod husks under inert and oxidizing atmospheres was studied. Samples from Cotopaxi, Ecuador were used as raw material. Thermogravimetry based experiments to obtain data vs. temperature. A novel strategy fit the TG DTG curves giving good by considering, in kinetic model, four biomass fractions following independent reactions. Analytical pyrolysis determine composit...

Table 1. Application of the oxygen section of the NEWS chart to 400 routine observations rounds for 22 patients on a respiratory ward with target oxygen saturation range of 88–92%. SpO2 Number of observations (%) Number with appropriate oximetry score in NEWS (%) Satisfactory 350 (87.5) > 270 had saturation within target range > 80 had saturation >92% breathing air 22/350 (6.3) > 22 had SpO2 ≥9...

We report that decomposition pathway of Ca(BH4)2 can be efficiently controlled by reaction temperature. That is, it decomposes into CaB6 at a lower temperature range of 320 to 350 °C, but into amorphous boron at 400 to 450 °C. We identified the formation of CaB2H6 as the crucial intermediate step on the way to CaB6 that only forms at 320 to 350 °C.

ABSTRACT An efficient method for the synthesis of N,N-bis(phenacyl)anilines was developed via smooth condensation of anilines with α-bromoacetophenones in the presence of sodium carbonate as acid acceptor and polyethylene glycol 400 (PEG 400) as catalyst at room temperature under solvent-free conditions by using 350 W ultrasound irradiation. In addition to experimental simplicity, the main adva...