fluorescence chemical sensors for the highly sensitive and selective determination of pb2+ , hg2+, co2+ and fe3+ ions in aqueous solutions are described. the ion sensing system was prepared by incorporating lipophilic ligand (l) as a neutral ion-selective fluoroionophore in the plasticized pvc membrane containing sodium tetraphenylborate or potasium tetrakis (p-chlorophenyl) borate as a liphoph...

the purpose of the present study was to see which one of the two instruction-processing instruction (pi) and meaningful output based instruction (mobi) accompanied with prompt and recast- is more effective on efl learners’ writing accuracy. in order to homogenize the participants in term of language proficiency a preliminary english test (pet) was administrated between 74 intermediate students ...

rested on sociocultural theory (sct), this study attempted to examine the effect of written corrective feedback (wcf) followed by producing written languaging on developing writing accuracy over new tasks. to this aim, two intact iranian efl classes at the low-intermediate level were randomly assigned to two experimental groups: direct (n = 25) and indirect (n = 25). both groups wrote on a numb...

Mint is one of the most important medicinal and aromatic plants in the world, however, the effects of shading levels on growth and quality of mint accessions have not been well documented. Therefore, the purpose of this experiment was to determine the effects of five shade levels on production of nine mint genotypes. For this purpose a completely randomized design with three replications was c...

Stability and adaptability of ten common bean cultivars were studied in water stressed and normal conditions, three planting dates (including 5 May, 20 May and 5 June), and two years (2014 and 2016) in Shahrekord, Iran. Combined analysis of variance for yield indicated that the effect of genotype by environment interaction was significant; therefore, more accurate statistical analyses were requ...

In order to study effect of G×E interaction on yield of genotypes in three environment. These genotypes were planted using RCB design with 3 replications in Esfahan, Kermanshah and Varamin. The results of combined analysis of variance for yield showed significant difference for genotype, location and G×E interaction effects. Because of significant G×E interaction stability analysis methods AMMI...

126 abstract: in this research we studied the effects of cyclic hydration and dehydration of cysts of artemia urmiana and artemia parthenogenetica on the hatching percentage, survival and growth. the experiment was carried out in 3 treatments (1-3 hydration/dehydration cycles) with 3 replicates for each treatment. later effects of cold preservation at -20°c during three time periods were ...