Background, aim and scope In water systems, water quality and geochemical properties of sediments determine the speciation of trace metals, metal transport, and sediment-water exchange, influencing metal availability and its potential effects to biota. Studies from temperate climates have shown that iron-ore mining and tailing wastewaters, besides being a source of trace metals, usually show hi...

[1] Previous field-scale experimental data and numerical modeling suggest that the dual-domain mass transfer (DDMT) of electrolytic tracers has an observable geoelectrical signature. Here we present controlled laboratory experiments confirming the electrical signature of DDMT and demonstrate the use of time-lapse electrical measurements in conjunction with concentration measurements to estimate...

Multiple gene knockout systems developed in the thermoacidophilic crenarchaeon Sulfolobus acidocaldarius are powerful genetic tools. However, plasmid construction typically requires several steps. Alternatively, PCR tailing for high-throughput gene disruption was also developed in S. acidocaldarius, but repeated gene knockout based on PCR tailing has been limited due to lack of a genetic marker...

For achieving the power maximum transmission, the electrical impedance matching (EIM) for piezoelectric ultrasonic transducers is highly required. In this paper, the effect of EIM networks on the electromechanical characteristics of sandwiched piezoelectric ultrasonic transducers is investigated in time and frequency domains, based on the PSpice model of single sandwiched piezoelectric ultrason...

Understanding the inactivation kinetics of bacterial spores during combined pressure-thermal processing is essential for process design. The knowledge on influence pH and water activity ( a w ) treatment limited. Experiments were conducted using Bacillus cereus suspended in citrate-phosphate buffers, adjusted to different levels (3.8–7.3) (0.80–0.99). Spores then treated with pressure-heat comb...

Abstract Tailing dams and waste dumps formed by the accumulation of mine wastes are usually at long-term unsaturated state under evaporation consolidated drainage conditions. Soil-water retention relation is one key constitutive relations to analyze seepage processes in tailing dumps. In this study, typical coarse- fine-grained tailings from a metallurgical were chosen study soil-water characte...