hexavalent chromium is mobile and hazardous in the environment. electrokinetic remediationof chromium (iv)-contaminated soils is intended either to remove or to reduce cr (vi) to cr (iii). this studyexamines the effectiveness of utilizing edta and acetic acid solutions as alternative electrolytes in theelectrokinetic (ek) process, with coupled nano-scale zero-valent iron (nzvi) as a barrier for...

Suppose sensors are deployed randomly in a long thin strip, and suppose each sensor can detect objects within a fixed distance. We say that the sensors achieve barrier coverage if there is no path across the strip that a small object can follow that avoids detection by the sensors. We give fairly precise results on the probability that barrier coverage is achieved as a function of the range of ...

multiple sclerosis (ms) is one of the most important autoimmune diseases recognized by demyelination and axonal lesion. it is the most common cause of disability in the young population. various immunomodulatory and immunosuppressive therapies, including different formulations of interferon beta (ifnβ), glatiramer acetate (ga), mitoxantrone, and natalizumab are available for this disease. howev...

background: by increasing the survival of immature newborns, intravenous access methods, used to provide intravenous therapy, became more important. more attention has been recently paid on peripherally inserted central venous catheters in newborns, although it is yet unknown in iran. in this study, we tried to discover the barriers to spread the usage of peripherally inserted central venous ca...

In this paper, a numerical study of barrier characterization effects on the high-temperature internal performance of an InGaAsP multi-quantum well laser is presented. The softwareused for this purpose self-consistently combines the three-dimensional simulation of carrier transports, self-heating, and optical waveguiding. The laser model calculates all relevant physical mechanisms, including the...

In this paper, the need for interfaith dialogue in the contemporary world has been emphasized in the light of the rise of ISIS and other takfiri movements. This necessity has been understood both by political and religious authorities in the Shiite world and by Christian religious authorities. It will be shown that the central message of all Abrahamic religions is theism; that is, the ...

Endothelial tight junctions (TJs)* are an important functional part of the blood-brain barrier (BBB). In this issue, Nitta et al. (2003) demonstrate that claudin-5, a transmembrane protein of TJs, is a critical determinant of BBB permeability in mice. Unexpectedly, knockout of claudin-5 did not result in a general breakdown of TJs but in a selective increase in paracellular permeability of smal...