The effects of major mineral salts, L-glutamine, myo-inositol and carbon source on shoot bud proliferation of date palm (Phoenix dactylifera L.) cv. Mejhoul were evaluated. Different concentrations of ammonium nitrate (NH4NO3; 550, 825 or 1650 mg/L), potassium nitrate (KNO3; 633.3, 950 or 1900 mg/L), calcium chloride dehydrate (CaCl2·2H2O; 147, 220 or 440 mg/L), potassium dihydrogen phosphate (...

Inadequate knowledge of the phase state of atmospheric particles represents a source of uncertainty in global climate and air quality models. Hygroscopic aqueous inorganic particles are often assumed to remain liquid throughout their atmospheric lifetime or only (re)crystallize at low relative humidity (RH) due to the kinetic limitations of efflorescence (salt crystal nucleation and growth from...

Abstract The increase in atmospheric nitrogen (N) deposition has profound effects on soil respiration (SR). However, the responses of SR to addition different N compounds, particularly saline–alkaline grasslands remain unclear. A 3-year controlled field experiment was conducted investigate compounds (NH4NO3, (NH4)2SO4 and NH4HCO3) during growing seasons a grassland located agro-pastoral ecotone...

An indigenous bacterium, Bacillus REP02, was isolated from locally sourced chromium electroplating industrial effluents. Response surface methodology was employed to optimize the five critical medium parameters responsible for higher % Cr(2+) removal by the bacterium Bacillus REP02. A three-level Box-Behnken factorial design was used to optimize K2HPO4, yeast extract, MgSO4, NH4NO3, and dextros...

Different endophytes isolated from the seeds of Sophora flavescens were tested for their ability to produce matrine production. Response surface methodology (RSM) was applied to optimize the medium components for the endophytic fungus. Results indicated that endophyte Aspergillus terreus had the ability to produce matrine. The single factor tests demonstrated that potato starch was the best car...

− In this paper the source preparation procedure for high-resolution U sources is described. This work was done in a collaboration between CIEMAT and IRMM within the frame of MetroFission, a project of the European Metrology Research Programme, in order to determine the alpha-emission probabilities of U. U was deposited from organic (iso-propanol) and inorganic (H2SO4/(NH4)2SO4, saturated NH4NO...

Aqueous aerosols are important in atmospheric chemistry, drug delivery, and human health. X-ray photoelectron spectroscopy (XPS), a surface-sensitive technique near-edge absorption fine structure (NEXAFS) which informs on the bulk, is deployed to study solvation of ammonium nitrate (NH4NO3). Aerosolised solutions NH4NO3 were introduced into spectrometer via an aerodynamic lens, interrogated wit...