Solvent-free ion/surface chemistry is studied at atmospheric pressure, specifically pyrylium cations, are reacted at ambient surfaces with organic amines to generate pyridinium ions. The dry reagent ions were generated by electrospraying a solution of the organic salt and passing the resulting electrosprayed droplets pneumatically through a heated metal drying tube. The dry ions were then passe...

Pyroxenes are among the most common minerals in the solar system and are ideally suited for remote geochemical analysis because of the sensitivity of their distinctive spectra to mineral composition. Fe is responsible for the dominant pyroxene absorptions in the visible and near-infrared, but substitutions of other cations such as Ca change the crystal structure and site geometries and thus the...

The present study focuses on the synthesis of novel catalytic nanoparticles and their effect combustion, performance, emission characteristics a diesel engine. For this purpose, Mg cations were doped into Fe3O4 lattice to form MgxFe(3-x)O4 (x = 0.25, 0.5, 0.75, 1) using solution combustion method. Comprehensive characterization studies carried out assess oxygen storage capacity (OSC) properties...

The title framework compound, [Mg(3)(C(8)H(4)O(4))(3)(C(3)H(7)NO)(4)](n) or [Mg(3)(bdc)(3)(DMF)(4)](n), was obtained as a side product of the solvothermal reaction of magnesium nitrate, terephthalic acid (bdcH(2)), and 1,3-bis-(4-pyrid-yl)propane in a 1:2:1 ratio in dimethyl-formamide (DMF). The asymmetric unit consists of three Mg(II) cations, three terephthalate anions, and four coordinating ...

Osteoporosis represents a major public health problem through its association with fragility fractures. The public health burden of osteoporotic fractures will rise in future generations, due in part to an increase in life expectancy. Strontium-based drugs have been shown to increase bone mass in postmenopausal osteoporosis patients and to reduce fracture risk but the molecular mechanisms of th...

During the positive-ion mode electrospray ionization mass spectrometry analysis of 1,4-diphenyl-3-benzoyl-1,4-dihydropyridines with methanol as the solvent, the major ion generated is one mass unit lower than the analyte, which can be rationalized as the oxidative aromatization of 1,4-dihydropyridines to pyridine cations.

background: there are great resources of natural zeolite in iran. zeolite, an inorganic ion-exchanger, may be used as a suitable technical-economical solution for water treatment in many regions of iran. in this study, the characterization of natural zeolite natrolite and the feasibility of removing hardness, cations, and anions were investigated. methods: first, zeolite composition and type we...

This study investigates the effect of Mg(2+) bound to the DNA major groove on DNA structure and dynamics. The analysis of a comprehensive dataset of B-DNA crystallographic structures shows that divalent cations are preferentially located in the DNA major groove where they interact with successive bases of (A/G)pG and the phosphate group of 5'-CpA or TpG. Based on this knowledge, molecular dynam...