In this study, the distribution of heavy metals pollution including arsenic, antimony, nickel, copper, cadmium, cobalt, bismuth, lead and zinc in the stream sediments of Zarshuran- Aghdarreh area was investigated by using statistical techniques and the geometric integration of each sample basin. For this purpose, the degree of pollution in 154 stream sediment samples was analyzed and the distri...

In order to investigate the effects of foliar spraying of iron nanoparticles on improvement of some physiological and morphological traits of purslane (Portulaca oleracea) under cadmium stress, a factorial experiment was conducted in a completely randomized design with three replications. The experimental factors included cadmium chloride in six levels (0, 25, 50, 75,100 and 125 mg/kg soil) and...

Zinc deficiency is the most widespread micronutrient disorder in the production of wheat (Triticum aestivum L.) and other cereal crops. An experiment was conducted in greenhouse, in 2013, using the sterile sand-perlite (2:1 v/v), to study the effects of two beneficial microorganisms on growth and nutritional status of wheat (Nicknejad cultivar). The study was arranged as factorial in a complete...

The soil salinity and the diffusion of potentially toxic chemicals to the soil environment through industrial and agricultural activities are known as important factors affecting the productivity of crop plants. Thus, an efficient strategy to increase crop yield, and to improve human and environmental health, is necessary to mitigate the impacts of these detrimental factors. Accordingly, a fact...

the central purpose of this study was to conduct a case study about the role of self monitoring in teacher’s use of motivational strategies. furthermore it focused on how these strategies affected students’ motivational behavior. although many studies have been done to investigate teachers’ motivational strategies use (cheng & d?rnyei, 2007; d?rnyei & csizer, 1998; green, 2001, guilloteaux & d?...

To study the effects of potassium (K) and zinc (Zn) with cadmium (Cd) in roots, stem, leaves and fruits of tomato plants, a greenhouse experiment was conducted as factorial based on complete random blocks design. The first factor was Zn at three levels (88.8, 177.6 and 355.2 μg/L) and the second factor was K at three levels (255, 510 and 1020 mg/L). In this experiment, the basic nutrition solut...

Background and Objectives: Reuse of treated wastewater in agriculture is becoming more attractive due to the growing demand for water, particularly in arid and semi-arid regions like Iran.In some areas, industrial wastewaters distribute arsenic in the water and vegetables, among the other plants, are mainly irrigated by municipal and industrial wastewater. This study aimed to evaluate the outco...

Introduction: Heavy metals as environment pollutant are potentially dangerous for living organisms. These metals cause interruption of enzyme activity and impaired synthesis of compounds that are essential for body, and can accumulate in aquatic bodies. The aim of this study was to determine lead, cadmium, nickel and zinc in canned fish in south of Iran. Methods: In this descriptive and analyti...