Several authors have carried out physic-chemical analyses of the raw water from Beni Haroun dam since it was exploited, and others continue to do so. The aim this work is present a temporal synthesis (2003-2018) variation in their quality. It depends on several parameters, such as climate, socio-economic development population growth around its tributaries. parameters studied are : Temperature,...

A nested 3d-chemical transport model, GEOS-Chem, was used to estimate the burden of disease (BoD) from PM2.5 exposure in fifty-three urban agglomerations (UAs) India with population 1 million or more, and contribution different chemical components these locations. Premature mortality due four diseases (ischemic heart disease, IHD, chronic obstructive pulmonary COPD, stroke lung cancer) caused b...

No inhibition of nitrogenase activity by physiological levels of NH4+ or carbamyl phosphate was observed in extracts of Azotobacter vinelandii. All of the 15N2 reduced by cultures which received no NH4+ was found in the cells. By contrast, more than 95% of the 15N2 reduced by cultures which had been given NH4+ was found in the medium. Failure to examine the culture medium would lead to the erro...

Ammoniacal nitrogen (ammonia and ammonium) in agricultural wastewaters can promote eutrophication of receiving waters and be potentially toxic to fish and other aquatic life. Zeolites, which are hydrated aluminum-silicate minerals, have an affinity for ammonium ions (NH4"") and are, therefore, potentially useful in removing this contaminant from wastewaters. The major objectives of this study w...

The development of ChemFET-based sensors for the soil analysis nitrogen-based ions is described in this work. Focusing on fluoropolysiloxane (FPSX) polymer-based matrix, nonactin and tetradodecylammonium nitrate (TDDAN) were shown to have best properties detection ammonium NH4+ NO3- respectively. Thus, FPSX-based pNH4-ISFET pNO3-ISFET microsensors exhibited good (sensitivity around 56 mV/pX con...

To date, research regarding the changes of sulfur and nitrogen rates in Wuhan during summer is limited. In this study, we analyzed air quality Wuhan, China, using water-soluble ion, gaseous precursor, weather data. A Spearman correlation analysis was then performed to investigate temporal characteristics their driving factors provide a reference for pollution control Wuhan. The results indicate...

A reference material of a PM2.5-like atmospheric dust material has been prepared using a newly developed method. It is intended to certify values for the mass fraction of SO42-, NO3-, Cl- (anions) and Na+, K+, NH4+, Ca2+, Mg2+ (cations) in this material. A successful route for the preparation of the candidate reference material is described alongside with two alternative approaches that were ab...

Enhanced monsoon duration and soil acidification from acid rain are expected to impact the distribution of microbial communities in surface and subsurface environments, although these impacts are poorly understood for most systems. In central China, soluble carbonate bedrock forms extensive karst landscapes. Current predictions are that the amount of monsoonal precipitation and acid rainfall in...

Based on ”spectral implementation” proposed by Madi et al. (J. Chem. Phys. 109, 10603, 1998), we have experimentally realized a pseudo-pure state by the line-selective excitation and a three-qubit Bernstein-Vazirani’s algorithm using a carbon-13 analine sample in NMR. The superiority of quantum computation to classical counterpart is well displayed. PACS numbers: 03. 67.Lx, 03.67.-a, 02.70.-c,8...

We use GEOS-Chem chemical transport model simulations of sulfateeammonium aerosol data from the NASA ARCTAS and NOAA ARCPAC aircraft campaigns in the North American Arctic in April 2008, together with longer-term data from surface sites, to better understand aerosol sources in the Arctic in winterespring and the implications for aerosol acidity. Arctic pollution is dominated by transport from m...