نتایج جستجو برای: 4 main indexes and 18 sub
تعداد نتایج: 17113635 فیلتر نتایج به سال:
Fire, as a natural ecological disturbance factor in forest, this study located in the Marivan region, Northern Zagros forest, and western Iranian state of Kurdistan. In each burned and unburned area 30 circle sample plot (1000 m2) were collected by randomized–systematic method in the 100×200 m net (in total 60 plots). In every sample plot the kind of species, number of tree, the heig...
Abstract Based on the coprecipitation of FeSO 4 (NH ) 2 SO with CuCl and ZnSO , CuFe O ZnFe nanocrystals were successfully synthesized. The morphology crystal structures nanoparticles studied via SEM, TEM XRD, which showed that MFe samples formed aggregated sizes 16 ? 20 nm a narrow dispersion in size. had typical spinel structures. Magnetic analyses demonstrated sample saturation magnetization...
in this research the focus of the researcher is on the influence of american myths that have long been held and offered by the american culture and ideologies. sam shepard is conceived to be one of the greatest playwrights of the contemporary american theater. in his works he depicts broken characters who are struggling to keep up with the national expectations but are ceaselessly borne back to...
the images of muslims in media, literature and politics have been mostly black and white portrayals of a people alien to modernity, civilization, rationality and pluralism. since the end of the cold war and the onset of deadly terrorist attacks in different areas of the world, especially in the united states, these representations show a palpable difference: muslims are represented not only as ...
Borosulfates are an expanding class of silicate-analogous materials. We report the syntheses and crystal structures two unconventional cadmium borosulfates. Cd[B2O(SO4)3] crystallises in a new structure type space group Pnma (no. 62, a=896.92(8), b=1152.0(1), c=872.75(8) pm, 1380 refl., 94 ref. param., wR2=0.112). Cd4[B2O(SO4)6] adapts α-Mg4[B2O(SO4)6]-type with P 147, a=822.22(4), c=797.88(5) ...
???CH4???????????????????????????.?????????????????CH4?????????.????????????????-???????????????????CH4???????????????.????????????????????????CH4?????????????????2017?8?-2018?11??????????????????????????????????????????????????.????????????????CH4?????0.02~0.91 ?mol/L??????CO2??????0.006~0.105 mmol/L????????????7~90 g/kg????????...
نمودار تعداد نتایج جستجو در هر سال
با کلیک روی نمودار نتایج را به سال انتشار فیلتر کنید