conclusions light and temperature were both relevant factors that contributed to the growth and beta-carotene accumulation of the three d. salina strains, and nahco3 had significantly positive effects on growth. the degree of impact of the different factors on cell growth was temperature > nahco3 > light intensity > kno3 > co (nh2)2 > strains; the impact on beta-carotene accumulation was temper...

Sorption data were obtained with a Matawan soil and the following chromium (III) organic complexes: chromium (III) ascorbate, chromium (III) glutamate, chromium (III) histidine, chromium (III) mandelate, chromium (III) citrate, chromium (III) cysteine, chromium (III) serine, chromium (III) pyruvate and chromium (III) oxalate. The influence of pH (2-12), ionic strength (0.005-1 M) and concentrat...

Heavy metals determination in manures provides benefi cial information to predict the availability and the potential contamination of environment. Therefore, a study was carried out to investigate heavy metals changes in livestock manure during a co-composting process. The metals were stepwise fractionated into exchangeable, adsorbed, organically bound, carbonate precipitated and residual forms...

The effect of different nitrogen sources – KNO3, NH4NO3 and NH4Cl – on glutamine synthetase and glutamate synthase activities of radish cotyledons (Raphanus sativus L.) in the presence or absence of light was investigated. The plants were treated with different phytohormones viz. Kinetin (KN), gibberellic acid (GA) and abscisic acid (ABA). In dark ammonia supplementation was effective in promot...

Anabaena sp. CA fails to synthesize heterocysts and nitrogenase when grown with KNO3 as the nitrogen source. By contrast, both heterocysts and proheterocysts are synthesized in NH4Cl-containing media to a level nearly commensurate with cells grown in the absence of combined nitrogen. The growth rate of the organism in NH4Cl-containing media was similar to that obtained with KNO3 as the nitrogen...

In this study, different nanofluids with phase change behavior were developed by mixing a molten salt base fluid (selected as phase change material) with nanoparticles using the direct-synthesis method. The thermal properties of the nanofluids obtained were investigated. These nanofluids can be used in concentrating solar plants with a reduction of storage material if an improvement in the spec...

Soil microorganisms can use a wide range of N compounds but are thought to prefer NH4 . Nevertheless, N isotope dilution studies have shown that microbial immobilization of NO3 can be an important process in many soils, particularly relatively undisturbed soils. Our objective was to develop a method for measuring NO3 immobilization potential so that the relative contributions of bacteria and fu...

In Mali, citrus fruits contribute significantly to the nutritional balance of population due their high content vitamin C, carotenoids and polyphenols. The sector in Mali is rich several species, but current trend production towards Tangelo (or Citrus×tangelo). objective this study was determine effects phytohormones 2,4,5-T, AG3 potassium nitrate (KNO3) on vegetative growth Tangelo. trial cond...

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 (...