The arteries deliver blood from the heart to tissues, while the veins return blood to the heart. Although we sometimes think of arteries and veins as simple tubes, in reality they are much more complex: they curve and branch, which profoundly influences blood flow and biomechanical forces within the arterial wall. The artery wall is composed of several types of cells that interact with each oth...

parkinson’s disease is one of the most common neurodegenerative disorders.  there are many documents about the effects of oxidative stress in parkinson’s disease etiology. angiotensin ii activates nadph dependent oxidases and causes superoxides formation.  peganum harmala l. extract, which has angiotensin converting enzyme (ace) inhibitory effect, is considered to evaluate oxidative stress inhi...

let $r$ be an associative ring with identity. an element $x in r$ is called $mathbb{z}g$-regular (resp. strongly $mathbb{z}g$-regular) if there exist $g in g$, $n in mathbb{z}$ and $r in r$ such that $x^{ng}=x^{ng}rx^{ng}$ (resp. $x^{ng}=x^{(n+1)g}$). a ring $r$ is called $mathbb{z}g$-regular (resp. strongly $mathbb{z}g$-regular) if every element of $r$ is $mathbb{z}g$-regular (resp. strongly $...

in order to investigate the effects of drought stress on grain yield and its components, a study was carried out (2011) as split plots in randomized complete blocks design in isfahan (32° 40'  n,51° 48' e). main factor was drought stress in four levels including irrigation after 80, 100, 120, and 140 mm evaporation from evaporation pan (class a) and subplots were three cultivars (sirena, record...

In this paper we study the existence of commuting regular elements, verifying the notion left (right) commuting regular elements and its properties in the groupoid G(n). Also we show that G(n) contains commuting regular subsemigroup and give a necessary and sufficient condition for the groupoid G(n) to be commuting regular.

the aim of this study was investigation the energy flow and global warming potential (gwp) of corn farm in gorgan city. for this purpose, data were collected from three conventional planting methods (spring planting, summer planting in wheat residue and summer planting without wheat residue) by using a face-to-face questionnaire performed with farmers in summer 2012. after the required data in ...

conclusions some il-10 promoter gene polymorphisms predisposed the infected hepatitis b virus cases to cirrhosis in our study population. patients and methods totally, 166 patients with chronic hepatitis b infection were enrolled. genotypes at different positions (i.e. -819, - 592, and - 1082) in the il-10 gene promoter were determined. results the c/a genotype at position -592, c/t genotype at...