نتایج جستجو برای: alkaline earth metals
تعداد نتایج: 193458 فیلتر نتایج به سال:
Complex 3D macrostructured nanoparticles are transformed from amorphous silica into pure polycrystalline α-quartz using catalytic quantities of alkaline earth metals as devitrifying agent. Walls as thin as 10 nm could be crystallized without losing the architecture of the particles. The roles of cation size and the mol% of the incorporated devitrifying agent in crystallization behavior are stud...
An important advantage of pattern-based chemosensor sets is their potential to detect and differentiate a large number of analytes with only few sensors. Here we test this principle at a conceptual limit by analyzing a large set of metal ion analytes covering essentially the entire periodic table, employing fluorescent DNA-like chemosensors on solid support. A tetrameric "oligodeoxyfluoroside" ...
The isothermal bulk modulus $$K_{{T_{m}}}$$ and surface tension γm of liquid metals at the melting point increase with decreasing atomic size a, these dependences are similar to one another. It is shown that transition a hexagonal closed-packed body-centered cubic structure concentrated above γm− regression line, face-centered below this line. In alkali, alkaline earth, rare earth metals, chang...
In the cold season, irregular coal supplies to coke plants are aggravated by need heat cars. Thawing of rail cars in garages (enclosures) is least efficient and most expensive approach. Treatment concentrates with chemical additives reliably prevents freezing winter during transit from suppliers consumers. With a view finding new reagents for preventing winter, lime, acetates chlorides alkaline...
Different Aluminum: alkaline earth metal atomic weight ratios effects on structure transformations in alanates nanopowders were studied. Changes in crystal structures from alane to alanates by increasing alkaline earth metals dopants in the mixture with slight changes in crystal structures from rhombohedral centered – trigonal (alane) to trigonal (magnesium alanate), and monoclinic (calcium ala...
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