نتایج جستجو برای: copper shaped
تعداد نتایج: 153833 فیلتر نتایج به سال:
New types of Cu-doped spherical-shaped activated carbons were prepared by pyrolysis at 700 °C chitosan hydrogels impregnated with KOH ratios (mKOH/mchitosan) ranging from 22.5% to 135%. At impregnation ratio lower than 63%, the precursor Cu doping allowed obtaining bead-shaped (diameter ~ 2 mm) and highest specific surface areas (1145 m2 g?1). The absence copper yielded carbon powders whatever ...
Incorporation of a nitrogen functionality into a tripodal N-heterocyclic carbene ligand system affords the first N-anchored tetradentate tris-carbene ligands TIMEN(R) (R = Me (5a), t-Bu (5b), Bz (5c)). Treatment of the methyl derivatized [H(3)TIMEN(Me)](PF(6))(3) imidazolium salt (H(3)5a) with silver oxide yields the silver complex [(TIMEN(Me))(2)Ag(3)](PF(6))(3) (9), which, in a ligand transfe...
This paper describes the application of approximate methods to invert airborne magnetic data as well as helicopter-borne frequency domain electromagnetic data in order to retrieve a joint model of magnetic susceptibility and electrical resistivity. The study area located in Semnan province of Iran consists of an arc-shaped porphyry andesite covered by sedimentary units which may have potential ...
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