نتایج جستجو برای: silica refractory
تعداد نتایج: 94793 فیلتر نتایج به سال:
Although the flash smelting technologies use different furnace designs, the refractory linings are exposed to very similar aggressive environments and, as a result, the corrosion analysis results on one type of furnace could be generally applied to other furnaces of similar high temperature processes. Particularities regarding the different chemistries of the pyrometallurgical process and opera...
Silicon Carbide as an inorganic material possesses properties like high thermochemical stability, high hardness and fracture toughness, low thermal expansion coefficient etc. It is therefore, widely used in the making of refractory, semiconductor devices, combustion engines, etc. Being a nonoxide, it has a tendency to get oxidized at elevated temperature under oxidizing atmosphere. Oxidation of...
abstract in aggregate, active forms of reactive silica with mineral names are sometimes associated with sand and gravel in concrete mixture. alkali hydroxides originated from alkalis in the cement or other resources form an alkaline silica gel with this reactive silica which becomes swallowed and expanded during time causing damage to concrete. there have been growing researches on alkaline r...
Control of the thermal properties of investment casting molds can be used to improve mold filing and control directional casting solidification. Experiments were performed to design a low thermal diffusivity investment casting mold through the use of hollow spherical refractory particles (cenospheres). The number of stucco layers in which the cenospheres were substituted for silica grain was an...
64 ■ For The Defense ■ November 2015 ■ Michael J. Crist is a partner of DLD Lawyers in Coral Gables, Florida. He has 25 years’ experience handling product liability, toxic tort, and insurance defense cases. He has been a member of trial teams in Florida, Georgia, New York, New Jersey, Pennsylvania, and Delaware, and has taken multiple cases to verdict. He has served as national counsel for manu...
Evidence for Fractional Condensation and Flash Reheating from Volatile Rich Objects in Ch-chondrites
Introduction: CH-carbonaceous chondrites have excess FeNi-metal and are strongly depleted in moderately volatile and volatile elements (Mn, Na, Zn, Se), but have CI refractory element/Mg ratios [1]. In contrast to other carbonaceous chondrites, CHs have high modal abundances of chondrules (~70 vol.%) with a mean diameter of 70-90 μm, FeNi-metals (~20 vol.%) and very low fractions of matrix (~5 ...
Background & objective: Due to high kinetic variation of antiepileptic medications in children, judgment on the efficacy of intravenous phenytoin and phenobarbital in treatment of refractory status epilepsy, requires measurement of serum levels of the drugs. The aim of this study was determine and compare serum levels of phenytoin and phenobarbital, as the two major and common first- line drugs...
Patients with acute myeloblastic leukemia (AML) with monosomy 7 are a group of patients with refractory AML who have a very poor prognosis. Therefore, rationally designed new therapies, including metronomic chemotherapy regimen with histidine deacetylase inhibitors (Valporic acid, ATRA) are being investigated as potential treatments for the population of refractory cases of AML. Herein, we repo...
introduction: refractory status epilepticus is a life-threatening disease in children wherein seizure movements don't response to first line anti convulsion drugs. this study reviewed risk factors, management and early outcome of children with refractory status epilepticus. methods: patients with refractory status epilepticus admitted in tabriz children's hospital between 2003 and 200...
lamotrigine (ltg), a newly developed antiepileptic drug (aed), is efficacious in treating refractory epilepsy. this study was designed to evaluate the efficacy and safety of ltg as add-on therapy in 40 children with refractory epilepsy. the trial was an open-labeled prospective study in children with drug-resistant epilepsy aged <14 years, who had at least 4 seizures per month in spite of recei...
نمودار تعداد نتایج جستجو در هر سال
با کلیک روی نمودار نتایج را به سال انتشار فیلتر کنید