The Minamata Convention on Mercury (Hg) calls for global efforts to reduce the release and risk of Hg. A better understanding Hg budget, transformation transport as well toxicity in environment, emission controlling technologies, is important minimize pollution exposure risks. Here, we summarized recent findings regarding cycle, transport, transformation, based publications Critical Review Envi...

a comparative study between antimicrobial toothpastes of pooneh, nasim and crest complete on microbial plaque con-trol dr. r. mofid* - dr. a.r. fathiye** - dr. k. alavi***- dr. m. zamiri**** * - assistant professor of periodontics dept. - faculty of dentistry – shaheed beheshti university of medical sciences. **- associate professor of periodontics dept. - faculty of dentistry – shaheed behesht...

lectin binding histochemistry was performed on the developing sympathetic ganglionic cells to investigate the distribution and density of defined carbohydrate terminals on the cell surface glycoproteins during autonomic system morphogenesis. sprague-dauley rat embryos from 9th gestational day to birth were fixed and paraffinized. serial sections of these specimens were incubated with different ...

This study examines the effectiveness of parapets in preventing overtopping failures small-scale homogeneous reservoir dams under seismic loads. In this study, a parapet covered entire width dam crest and was designed to ensure its weight is transmitted crest. The test included four modes: initial mode, first seepage, seismic, second seepage. results show that without crack length expand signif...

A physical model of gabion overflow dams was studied to determine the velocity profile and Reynolds shear stress. Physical tests were done under two different conditions of dam crest, overflow dams with impermeable and with permeable crests. Instantaneous velocity components over dam crest were measured by an ADV (Acoustic Doppler Velocimeter) instrument. This instrument is capable of measuring...

introduction: whitening toothpastes which have been accepted in populations may affect properties of enamel and restorative materials. the aim of this study was to compare the microhardness of human enamel and z250 microhybrid composite resin after brushing with two whitening toothpastes. materials and methods: in this experimental study of enamel specimens, forty five freshly extracted human i...

Iliac crest bone graft remains the gold standard in achieving spinal arthrodesis, but chronic pain from graft harvest occurs in up to 39% of patients. Studies have shown that a single administration of local anesthetic reduces short-term pain, but they have not adequately investigated possible longer-term benefits. The goal of this study was to determine whether local administration of bupivaca...

We present a simple, automatic method for extracting feature curves, called crest lines, from point clouds. Crest lines are surface shape features having a mathematical background. Given an unstructured point cloud as input, we pre-process the data to generate some topological information by creating an undirectional surface graph. The method starts with the approximation of normal curvature on...

Previous analyses of single neural crest cell trajectories have suggested important roles for interactions between neural crest cells and the environment, and amongst neural crest cells. To test the relative contribution of intrinsic versus extrinsic information in guiding cells to their appropriate sites, we ablated subpopulations of premigratory chick hindbrain neural crest and followed the r...

Container motion along a planar circular trajectory at constant angular velocity, i.e. orbital shaking, is of interest in several industrial applications, e.g. for fermentation processes or cultivation stem cells, where good mixing and efficient gas exchange are the main targets. Under these external forcing conditions, free surface typically exhibits primary steady-state through single-crest d...