in the present study, a field study was performed on some herbaceous plants growing in thesoutheast of ahvaz, where some metal producing industries are active. the aim of this studywas to investigate and compare manganese (mn) and zinc (zn) accumulation in seven dominantherbaceous plants in this area. plant samples were collected randomly. associated soils weresampled from the same sites next t...

background: heavy metals have detrimental effects on the health of human being. the values of manganese (mn) and lead (pb) in some plant species and soil samples in an arid area of iran were evaluated in this study. methods: the values of pb and mn in 94 plant samples from 8 plant species and the related soil samples in 2010 were considered in shahroud and damghan, central iran. moreover, the s...

meningitis is one of the most common infectious cerebral nervous system (cns), defined as an inflammation of the meninges. it is clinically categorized into a chronic and acute based on the acuity of symptoms. vomiting, bulging fontanel and fever are the main symptoms in the patients with meningitis. bacterial meningitis is a severe, potentially life-threatening infection that is associated wit...

we used wild boars and roe deer as biomonitors of lead (pb), cadmium (cd), and mercury (hg)contamination in two major industrial sites in poland with different levels of toxic metal pollution. masurianlakes district, located far away from industry, was used as the reference site. levels of pb, cd, and hg in liver,kidney and muscle samples and in the stomach content of the animals were determine...

We consider factor analysis when we assume the distribution form is known up to its mean and variance. A prior is placed on the mean and variance and then inference is made as to whether or not any latent factors exist. Inference is carried out by comparing the concentrations of the prior and posterior about various subsets of the parameter space that are specified by hypothesizing factor struc...

Abstract Despite extensive research support, the role of diversification in current factor investing strategies remains neglected. This paper investigates whether well-designed multifactor portfolios should not only be based on firm characteristics, but also include portfolio effects. While alpha concentration approach mainly considers factor-specific diversified utilizes covariance estimators ...