in the present work, the extraction of zinc from a sphalerite concentrate using sodium nitrate as an oxidant in a sulfuric acid solution was investigated. the effective parameters such as the temperature, sulfuric acid and sodium nitrite concentrations, stirring speed, particle size, and solid/liquid (s/l) ratio were analyzed. the dissolution rate increased with increase in the sulfuric acid an...

Previous studies have clearly shown that the injection of iodized oil in the pregnant women may be a prophylactic strategy for IDD (Iodine Deficiency Disorders) and could improve the growth indices of their offsprings. Since the administration of pharmacological doses of iodine may occasionally lead to large goiter and rarely hypothyroidism, in the present study the thyroid function tests of th...

Aim of this study was to determine the effect tebuconazole applications on cucumber seedling via morphological and molecular methods. In order most appropriate dose different concentrations (25, 50, 75, 100, 125 150 ppm) affecting quality preventing possible genotoxic effects, retrotransposon motility at all doses determined. Polymorphism rates changes in GTS values were also At applied doses, ...

The effects of different concentrations of Zinc oxide nano particles (ZnONP; 0, 10, 25, 50, 75 and 100 mg L-1) and Humic acid (HA; 0, 50, 100, 500 and 1000 mg L-1) on root length and number, leaf length and number, bulb diameter, and chlorophyll, total phenol, anthocyanin and flavonoid contents were examined under in vitro conditions. Total phenol, flavonoid and anthocyanin contents were signif...

One of the most effective ways of managing adult mosquitoes that vector human and animal pathogens is the use of ultra-low-volume (ULV) insecticides. Because of the lack of environmental fate studies and concerns about the safety of the insecticides used for the management of adult mosquitoes, we conducted an environmental fate study after truck-mounted applications of permethrin and naled. One...

in order to identification of allelopathic compounds and investigation of the effect of aerial part extract of orchard grass on germination and seedling growth of alfalfa an experiment conducted as completely randomized design with four replications at university of mohaghegh ardabili, iran. treatments were concentrations of orchard grass extracts including 0, 25, 50, 75, and 100%. radicle and ...

Both lower serum 25-hydroxyvitamin D [25(OH)D] and elevated homocysteine concentrations are potential risk factors for cardiovascular disease (CVD). A recent analysis of the National Health and Nutrition Examination Survey reported an inverse association of serum 25(OH)D with homocysteine, however, the longitudinal relationship has yet to be investigated. We hypothesized and examined whether a ...

Although dissolved organic nitrogen (DON) plays an important role in the dynamic processes of mineralization, fixation, and leaching, ecological driving forces DON across Tibetan Plateau remain largely unknown. Here, we measured climate, soil, plant indicators, concentration on Plateau, used “change-point” analysis to determine patterns. Then correlation was applied analyze relationship between...