The postperovskite transition in MgSiO(3) at conditions similar to those expected at the D'' discontinuity of Earth's lower mantle offers a paradigm for interpreting the properties of this region. Despite consistent experimental and theoretical predictions of this phase transformation, the complexity of the D'' region raises questions about its geophysical significance. Here we report the therm...

in many studies, the medicinal properties and impact of blond plantain on mechanisms of human physical activities has been proven. salinity is an important abiotic stresses with detrimental effects on seed germination. an experiment was conducted to study germination characteristics of blond plantain under water and salinity stress conditions at different temperatures. the experiment was conduc...

drought stress, especially drought at terminal stages, plays an important role in reduction of yield in field crops such as common beans. 50 genotypes of common bean including 3 control genotypes (dehghan, bahman and naz) were used to evaluate and identify the tolerant genotypes. this experiment were performed in a randomized complete block design (rcbd) with three replications under two condit...

pishgam was selected from the progeny of a cross between barakat iranian bread wheat cultivar and chinese 90-zhong 87 winter-habit ( bkt/90-zhong 87) in 1995. the f1 generation seeds were planted in karaj station in 1995-96 cropping season. selected-bulk method was applied to segregating generations from f2 to f5 generations for characters such as winter hardiness, plant height, straw strength,...