composites with micro- and nano-metal fillers has attracted the attention of researchers for radiation shielding applications. Lead toxicity and heaviness have oriented extensive research toward the use of non-lead composite shields. The present study aimed to systematically review the efficiency of the composite shields of various micro- and nano-sized materials as composite shields have been ...

conventional hydrostatic barium reduction or pneumatic reduction of intussusception is associated with considerable ionizing radiation. the aim of this study was to evaluate ultrasound-guided hydrostatic reduction for childhood intussusception using water enema. a total of 76 children who diagnosed as having intussusception were referred to doctor sheikh children hospital in mashhad (northeast ...

OBJECTIVE To investigate the possible involvement of inward rectifying K(+) channels (K(IR)) in the response of human resistance vessels to bradykinin in vivo. METHODS AND RESULTS Drugs were administered via the brachial artery in healthy male volunteers and forearm blood flow was measured by venous occlusion plethysmography. Inhibition of K(IR) by barium chloride (4 micromol min(-1)) alone o...

Identifying the fate of contaminants (such as barium) during gas field produced water reinjection could be a feasible method to evaluate environmental risks project and thus improve its sustainability. To assess barium sorption behaviors reinjected into sandstone reservoirs, series water–rock interactions experiments were conducted systematically investigate effects brine/rock ratio (5:1~500:1)...

nanocrystalline particles of barium hexaferrite has been prepared by the sol–gel auto- combustion method using iron and barium nitrate with a ba:fe molar ratio of 1:10. the effect of fuel such as citric acid and aspartic acid was investigated on the structure and magnetic properties of nanoparticles. the results revealed that the formation of barium hexaferritefine particles is influenced by mo...

background although heller myotomy is one of the most effective treatments for achalasia, it may be associated with early or late symptom relapse in some patients. therefore, additional treatment is required to achieve better control of symptoms. aim : to evaluate the safety and efficacy of pneumatic balloon dilation (pbd) in patients with symptom relapse after heller myotomy. methods thirty si...

Barium studies investigations (barium swallow, barium meal and barium enema) are the basic routine radiological examination, where barium sulphate suspension is introduced to enhance image contrast of gastrointestinal tracts. The aim of this study was to quantify the patients' radiation doses during barium studies and to estimate the organ equivalent dose and effective dose with those procedure...

pure barium zirconate nanopowders were successfully prepared in wet-chemistry synthesismethod, using barium stearate and tetra-n-butyl zirconate as ba, zr sources and stearic acid ascomplexing reagent. the gel was calcined at 800 and 900 °c in air. results of thermal analysisare given, including both dtg and tg. fourier transform infrared spectrometry (ftir), x-raydiffraction (xrd), transmissio...

Conventional hydrostatic barium reduction or pneumatic reduction of intussusception is associated with considerable ionizing radiation. The aim of this study was to evaluate ultrasound-guided hydrostatic reduction for childhood intussusception using water enema. A total of 76 children who diagnosed as having intussusception were referred to Doctor Sheikh Children Hospital in Mashhad (northeast ...

The article presents the results of a study thermodynamic-diagram analysis Fe-Si-Al-Ba multicomponent system, where, on basis thermodynamic data, boundary ternary systems basic four-component system are constructed. As result, it was determined that consists 12 elementary tetrahedra. For each tetrahedra, analytical equations determined, with help which is possible to establish location in facto...