نتایج جستجو برای: alkali and alkaline earth metals
تعداد نتایج: 16861401 فیلتر نتایج به سال:
Transition metals are essential components of important biomolecules, and their homeostasis is central to many life processes. Transmembrane transporters are key elements controlling the distribution of metals in various compartments. However, due to their chemical properties, transition elements require transporters with different structural-functional characteristics from those of alkali and ...
Selective catalytic reduction (SCR) is still the most widely used process for controlling NOx gas pollution. Specifically, commercial vanadium-based catalysts have problems such as narrow operating temperature range and environmental Researchers developed a series of cerium-based with good oxygen storage performance excellent redox CeO2. However, anti-poisoning catalyst key to its application. ...
NMR parameters in alkali, alkaline earth and rare earth fluorides from first principle calculations.
(19)F isotropic chemical shifts for alkali, alkaline earth and rare earth of column 3 basic fluorides are measured and the corresponding isotropic chemical shieldings are calculated using the GIPAW method. When using the PBE exchange-correlation functional for the treatment of the cationic localized empty orbitals of Ca(2+), Sc(3+) (3d) and La(3+) (4f), a correction is needed to accurately calc...
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