نتایج جستجو برای: magnesium powder
تعداد نتایج: 84107 فیلتر نتایج به سال:
Terbinafine hydrochloride is a white to off-white fine crystalline powder. It is freely soluble in methanol and methylene chloride, soluble in ethanol, and slightly soluble in water. Each tablet contains: Active Ingredients: terbinafine hydrochloride (equivalent to 250 mg base) Inactive Ingredients: colloidal silicon dioxide, NF; hydroxypropyl methylcellulose, USP; magnesium stearate, NF; micro...
Various aldoximes and ketoximes were selectively reduced to the corresponding amines by catalytic transfer hydrogenation employing low cost magnesium powder and ammonium formate at room temperature. Many other functionalities such as halogens, –OH, –OCH3, –COOH and –CH3 remained unaffected. The hydrogenation is fast, mild, clean, cost effective and high yielding.
The magnesium-rich intermetallic compounds RETMg2 (RE = La, Pr, Nd; T = Ni, Pd, Pt) were obtained by melting of the elements in sealed tantalum ampoules and subsequent annealing. Their structures have been characterized on the basis of powder X-ray diffraction. The RETMg2 phases crystallize with the orthorhombic MgCuAl2-type structure, space group Cmcm. The crystal chemical peculiarities are br...
Synthetic modification of trichlorofluoromethane (CFCl3) to non-volatile and useful fluorinated precursors is a cost-effective and an environmentally benign strategy for the safe consumption/destruction of the ozone depleting potential of the reagent. In this report, we present a novel method for in situ Grignard reaction using magnesium powder and CFCl3 for synthesis of dichlorofluoromethyl ar...
Dolomite is a double salt composed of calcium carbonate (CaCO3) and magnesium carbonate (MgCO3). The heat treatment of CaCO3 and MgCO3 respectively generates calcium oxide (CaO) and magnesium oxide (MgO), which have antimicrobial activity. In this study, heated dolomite powder (HDP) slurry was investigated for its sporicidal activity against Bacillus subtilis ATCC 6633 spores. The B. subtilis s...
The basic principle of liquisolid systems formulation lies in the conversion of the drug in a liquid state into an apparently dry, free-flowing and readily compressible powder by its blending (or spraying) with specific carriers and coating materials. The selection of the most suitable carrier and coating material depends especially on their values of flowable liquid retention potential (Φ), wh...
Controlled chemical doping of magnesium diboride (MgB2) has been shown to substantially improve its superconducting properties to the levels required for high field magnets, but the doping is difficult to accomplish through the usual route of solid state reaction and diffusion. Further, superconducting cables of MgB2 are difficult to fabricate because of the friable nature of the material. In t...
Roller compaction is a dry granulation technique used in the pharmaceutical industry, in which a powder formulation is compressed into a ‘ribbon’ compact between two counter rotating rolls. The ribbon is subsequently milled into granules of a desired size range. Whilst simple in principle, successful control of a roller compaction process is often difficult as it is multivariate in design. Furt...
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