Background & objectives: Heavy metals enter water sources in many ways and cause hazards such as poisoning and carcinogenesis in the living organisms. This study aimed to investigate the concentration of heavy metals (arsenic, mercury, and cadmium) in the Yamchi Reservoir Dam and Ardabil drinking water distribution network in high and low rainfall seasons in 2018. Methods: In this cross-sectio...

The generic Berry phase scenario in which a two-level system is coupled to a second system whose dynamical coordinate is slowly-varying is generalized to allow for stochastic evolution of the slow system. The stochastic behavior is produced by coupling the slow system to a heat reservoir which is modeled by a bath of harmonic oscillators initially in equilibrium at temperature T , and whose spe...

At high temperatures the breaking of chemical bonds becomes relatively easy and the slow step in a chemical reaction shifts to the rate at which energy can seep into the bond that is to break. This has been observed by various investigators. A new general theory of reactions is developed here to explain this limiting rate at high temperatures. In the case of cyclopropane and cyclobutane the the...

Some species of garden birds are considered to be sensitive to Salmonella (S.) spp. infections. The aim of this study was to determine the cause of mortality of six free-living birds in one private property in suburban area of Wrocław (Poland). In 2013 Poland experienced prolonged winter, with low temperatures and snow precipitations. During March and April, two dead individuals of the Eurasian...

Distributions of nitric oxide vibrational temperature, rotational temperature and velocity have been measured in the hypersonic freestream at the exit of a conical nozzle , using planar laser-induced fluorescence. Particular attention has been devoted to reducing the major sources of systematic error that can affect fluorescence temperature measurements, including beam attenuation, transition s...

According to the exploration and field test results, the reservoir presents high temperature (96°C) and high salinity (77954.03 mg/L) features; therefore, it is necessary to find proper plugging agent that can be used in these reservoirs to enhance oil recovery. In this paper, three kinds of polymers are studied and high temperature resistance as well as relative parameters are tested. Accordin...

The lava section in the Troodos ophiolite, Cyprus, is chemically stratified and divided into a shallow lava sequence with low TiO2 content and a deeper lava sequence with high TiO2 content. We calculate the viscosity at magmatic temperature based on major element chemistry of lavas in Cyprus Crustal Drilling Project (CCSP) Holes CY-1 and 1A. We find that typical shallow low-Ti lavas have a magm...

Cuprate high-temperature superconductors consist of two quasi-two-dimensional (2D) substructures: CuO2 superconducting layers and charge reservoir layers. The superconductivity is realized by charge transfer from the charge reservoir layers into the superconducting layers without chemical dopants and defects being introduced into the latter, similar to modulationdoping in the semiconductor supe...

Thermal end effects on electroosmotic flow in a capillary are numerically investigated in this paper. The model accounts for the dynamic coupling effects of Joule heating on the temperature field, the electrical double layer field, the applied electric potential field and the flow field in the full capillary from reservoir to reservoir. These fields are strongly coupled via temperature dependen...

1. We examined the ecological genetics of the invasive cladoceran Daphnia lumholtzi in a reservoir (Lake Texoma) in the southern USA. This species originates from the Old World subtropics and has spread across North America since the late 1980s after its inadvertent introduction to a reservoir in northeastern Texas. 2. The population genetic structure of D. lumholtzi was examined seasonally on ...