نتایج جستجو برای: gold etc
تعداد نتایج: 202311 فیلتر نتایج به سال:
The circuit shown in Figure 1 is often called a half-wave rectifier because the diode supposed to stay on for 50% of one cycle. However, that view untrue since on-duty ratio depends parameters.
A diode works for battery charging, as shown in Figure 1 . When we use an RF source excitation, the wiring inductance L matters. Let us consider how affects turn-on and -off operation. The voltage xmlns:xlink="htt...
Gold-gelatin bionanocomposite films are prepared by the reduction of gold ions by sodium borohydride in an aqueous solution. It is shown that both the solution and the films on glass substrates contain entrapped hydrogen micro- and nanobubbles with diameters in the range of 200 nm-3 μm. The optical properties of gold nanoparticles in the presence of gelatin and hydrogen nanobubbles are measured...
Organic-inorganic hybrid nanoflowers with flower-like morphology are new nanostructures comprising organic and inorganic components. In general, the organic component of hybrid nanoflowers mostly consists of proteins, DNA, RNA, plant extracts, metabolites, and natural polymers; and the inorganic component composes of various metal phosphates, including copper, calcium, manganese, iron, zinc, co...
Generalization of the results study placer gold and mechanisms its distribution in east Siberian Platform made it possible for first time to reveal that ore sources gold-bearing placers were mainly mineralization gold-sulfide formation formed under influence hydrothermal metasomatic processes occurred deep fault zones. It is determined hydrothermal-metasomatic formations rock are amagmatic, nea...
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