نتایج جستجو برای: refractory metal
تعداد نتایج: 254511 فیلتر نتایج به سال:
In this study, the composition of magnesium aluminate spinle and the converter mud were used as raw materials to in-situ formation of hercynite phase in magnesite-hercynite refractory bricks. The pressed samples were sintered at 1400 and 1500℃ and then, the phase composition of bricks was evaluated after firing at 1400℃. Besides, the effect of nano-magnesia particles addition on the properties ...
Endoscopic placement of a single plastic stent (PS) to the main pancreatic duct (MPD) is awidely accepted treatment method for symptomatic strictures in patients with chronic pancreatitis [1,2]. Although adequate stent placement in the dominant stricture will relieve pain in the majority of patients [3–5], stents cannot be definitively removed in approximately one-third of patients because of p...
In this research project, the properties and characterization of one kinds of Iranian bauxite extracted from Damavand Shahbolaghi mine near Tehran were compared with one type of industrial China's refractory grade bauxite in order to using in refractory industries. At first physical, chemical and thermal properties and phase and micro structural evolutions of as received and sintered samples at...
3D graphene-based materials are promising adsorbents for environmental applications. Furthermore, increasing attention has been paid to the improvement of graphene removing pollutants. In this article, progress in modification and their performance pollutants were reviewed. The strategies, which classified as (1) activation with CO2 (steam other oxidants) (2) surface functionalization polymers ...
Penetration and dissolution mechanisms are reviewed for predominantly single-phase oxide, two phase oxide and oxide-carbon composite refractories by liquid silicate slags. Theoretical models of these processes, as well as static (sessile drop, dipping and crucible) and dynamic (rotating finger and rotary slag) experimental tests, along with their practical limitations are considered. Direct (co...
Refractory celiac disease (RCD) is when malabsorption symptoms and villous atrophy persist despite strict adherence to a gluten free diet (GFD) for more than 12 months and other causes of villous atrophy have been ruled out. RCD is considered a rare disease and almost exclusively occurs in adults. Persistent diarrhea, abdominal pain, weight loss are the most common symptoms in RCD. Also, anemi...
Introduction: Celiac disease can be associated with other diseases, including neurological disorders. In this study, the relationship between celiac disease and refractory epilepsy was evaluated in patients who were referred to Imam Khomeini Hospital in Urmia. Methods: In this cross-sectional study, patients with refractory epilepsy who were referred to the neurology clinic of Imam Khomeini Ho...
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