نتایج جستجو برای: so3
تعداد نتایج: 618 فیلتر نتایج به سال:
(1.1) ‖φj‖L∞ = O(λ n−1 2 j ). The example of the sphere shows that (1.1) is sharp. The corresponding sharp Lbounds are due to Sogge [So1, So2, So3]. Even thought this L-bound is far from generic [STZ], the only general improvements on (1.1) that we are aware of are due to Sogge and Zelditch [SZ] and more recently, Sogge, Toth and Zelditch [STZ, T4]. These authors obtain pointwise o(λ n−1 2 )-bo...
Cellulose thin films were chemically modified by in situ sulfation to produce surfaces with anticoagulant characteristics. Two celluloses differing in their degree of polymerization (DP): CEL I (DP 215–240) and CEL II (DP 1300–1400) were tethered to maleic anhydride copolymer (MA) layers and subsequently exposed to SO3·NMe3 solutions at elevated temperature. The impact of the resulting sulfatio...
A sulfated neolactotetraosylceramide has been isolated from the lipid extract of hog gastric mucosa. Isolation procedure involved extraction of lipids with 0.4 M sodium acetate in methanol/chloroform/water, alkaline methanolysis, column fractionation on DEAE-Sephadex, separation of the acetylated acidic glycolipids on silicic acid column, and thin layer chromatography. By partial acid hydrolysi...
In the nature, sodium sulfate is one of the most common dissolveds minerals in the water. There are a lot of sodium sulfate in the Tutak craters, which locate in the Rayen city, 120 km southeast of Kerman. Since the perfect time to blooming of sodium sulfate occurs at the late summer and early October, so, sampling of sodium sulfate for this study, done in early September. Samples took from the...
V2O5/SiO2 catalyst was utilized to oxidize SO2 to SO3 species in the presence of oxygen mainly for producing sulfuric acid. For this catalyst, the active phase was a mixture of vanadium pentoxide and basic sulfate/pyrosulfate material. This active phase at the reaction temperature behaved as a liquid filling up the pores of the silica support. On the other hand, amounts of the SO3 and V5+ speci...
One of the main reasons for the blocking and sticking of the expendable layer in tundish plaster to the permanent layer and the subsequent increase in refractory consumption and associated costs is the use of low-melting phosphate binders. At high temperatures in continuous casting of steel, phosphate binders provide low-melting point melts which cause reactions between the two consuming and pe...
The dosimetric characteristics of γ-radiation induced defects in strontium sulfate rod dosimeter were investigated using electron paramagnetic resonance (EPR) technique focusing on the dose range of 10–15000 Gy. The most significant EPR signals of spectroscopic splitting factor (g-value) g=2.0036 ، g=2.0090 and g=2.0160 were observed and attributed respectively to the SO4¯, SO3&...
In this note we will determine the symmetry groups of the Platonic solids. We will use Maple to help us do this. The five Platonic solids are the tetrahedron, the cube, the octahedron, the dodecahedron, and the icosahedron. We will view the symmetry groups of these solids in two ways. By definition, the symmetry group of a solid is the set of isometries of R that stabilize the set. In each of t...
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