نتایج جستجو برای: silicon
تعداد نتایج: 81367 فیلتر نتایج به سال:
Metal oxides such as ZnO, SnO2 and W2O3 with super properties are widely used in the different fields of science and proper synthesis of these materials is of the great importance. In this work, some metal oxides with nano structures including SnO2 nanopyramids, V2O5 nanowires and hierarchical structure of SnO2 nan...
Drought stress stimulates the production of reactive oxygen species (ROS) in chloroplasts. ROS laed to lipid peroxidation and damage to the cell membrane. In the current study, the effect of different concentrations of silicon were examined on oxidative stress caused by drought in fennel plant. The experimental design was a split plot based on RCBD with three replications in which irrigation re...
In medicinal plants, secondary metabolites are very important and factors influencing their quantity and quality are considered. Iranian borage (Echium amoenum Fisch. & C. A. Mey.) belonging to Boraginaceae family is a long-day, biennial, herbaceous plant, with a lot of rough trichomes, is found in northern Iran. In the present work, effects of silicon on some morphological, anatomical and ph...
Silicon is a chemical element that has many positive effects on some qualitative and quantitative characteristics of many plant species such as ornamental plants. The aim of this research was to investigate the impact of silicon spray on growth and photosynthetic characteristics of chrysanthemum. This study was performed as a factorial completely randomized design with 2 factors: silicon source...
Work function and surface energy per unit area were calculated in the framework of density functional theory (DFT) with Linearized A ug mented Plane Wave Plus Local Orbital method in full potential for a clean symmetric slab of silicon containing two (top and bottom) surfaces. The surfaces were theoretically modeled using supercell technique by stacking a variety of silicon layers along (111)...
Abstract: The use of silicon has been considered as an effective strategy in reduce of cd uptake and affecting the oxidative damage caused by cd toxicity. The aim of this study was to investigate the effect of the presence silicon (0.1 mM/L) and different levels of cadmium (0.10, 50 μmol/L) in wheat plants under hydroponic conditions. The results showed that increasing the concentration of cd...
silicon nanowire (sinw) arrays were produced by electroless method on polycrystalline si substrate, in hf/ agno3 solution. although the monocrystalline silicon wafer is commonly utilized as a perfect substrate, polycrystalline silicon as a low cost substrate was used in this work for photovoltaic applications. in order to study the influence of etching time (which affects the sinws length) on d...
Rice (Oryza sativa L. cv Oochikara) is a typical silicon-accumulating plant, but the mechanism responsible for the high silicon uptake by the roots is poorly understood. We characterized the silicon uptake system in rice roots by using a low-silicon rice mutant (lsi1) and wild-type rice. A kinetic study showed that the concentration of silicon in the root symplastic solution increased with incr...
This article presents infrared absorption data of amorphous silicon alloys in which the hydrogen isotopes deuterium and tritium have been substituted for hydrogen. Silicon–deuterium and silicon– tritium vibration frequencies are related to silicon–hydrogen vibration frequencies by simple mass relationships. The silicon–deuterium wagging vibration is broadened and blueshifted due to strong coupl...
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