Risk assessment of nanomaterials represents one of the cutting-edge topics in toxicology (Zhao et al., 2014; Lucafo et al., 2013; Fadeel et al., 2013; Kroll et al., 2012; Kim et al., 2012; Hadrup et al., 2012; Lange and Obendorf, 2012; Xu et al., 2013). Numerous nanomaterial containing consumer products have already been introduced on the market, including textiles, sunscreens, paints, car tyre...

recently, rahimi et al. [comp. appl. math. 2013, in press] dened the conceptof quadrupled xed point in k-metric spaces and proved several quadrupled xed pointtheorems for solid cones on k-metric spaces. in this paper some quadrupled xed point resultsfor t-contraction on k-metric spaces without normality condition are proved. obtainedresults extend and generalize well-known comparable result...

34 AI MAGAZINE In its fall and winter 2013 issues, AI Magazine published a series of articles presenting some of the best current work at the intersection of artificial intelligence and education. The articles report on the newest in intelligent tutoring systems and resources (Bredeweg et al. 2013, Rus et al. 2013; Chaudhri et al. 2013), virtual humans and conversational agents (Swartout et al....

1. introduction dust storm is a natural phenomenon that occurs frequently in the arid and semi-arid regions all over the world (alijani, 1997). dust can affect soil fertility, forests, rivers, lakes, and marine ecosystems around the world (mctainsh et al., 2007). therefore, soil erosion can lead to the loss of the minerals and organic matter of topsoil. some elements of dust have also an indire...

In the past HepG2 cells have been considered to show only little similarity to primary human hepatocytes (Godoy et al., 2013; Hewitt et al., 2007). However, recently it has become clear that the phenotype of HepG2 cells strongly depends on culture conditions. In a recent study, Ramaiahgari et al. (2014) cultivated HepG2 cells in spheroids. In this culture system the cells stopped proliferation ...

how to cite this article: tonekaboni sh, mollamohammadi m. neurodegeneration with brain iron accumulation: an overview. iran j child neurol. 2014 autumn;8(4): 1-8. abstract objective neurodegeneration with brain iron accumulation (nbia) is a group of neurodegenerative disorder with deposition of iron in the brain (mainly basal ganglia) leading to a progressive parkinsonism, spasticity, dystonia...