The effect of Co0.6Zn0.4Fe2O4 ferrite slab loaded rectangular waveguide on microwave propagation

This research is based on experimental results of magnetization and magnetic susceptibility of ferrite slab prepared in a previous work with a computerized simulation to find the influence of ferrite slab on a microwave propagation in terms of determining the behavior of attenuation factor .A slab of ferrite Co0.6Zn0.4Fe2O4were prepared by classical ceramic method. We have studied an influence of slab of the CoZn-ferrite its thickness is , loaded in a rectangular waveguide on a propagation of microwaves. The values of the reverse and forward attenuation factor has been found. After that, we choose the location of the slab X0 inside the guide which means the optimum status of microwave propagation has been reached at .

Fe and Cu Accumulation In Lamium moschatum Mill.

We present in this study accumulate of two heavy metals (Fe - Cu) in the tissues of flowers , leaves , stems and roots of Lamium moschatum Mill. The study showed that the plant accumulated (Fe - Cu) in different concentrations , with an increase in the concentration of (Fe) in all samples specially in roots . The highest concentration of (Cu) was in flowers (1669.23 mlg/kg) , and for (Fe) was in roots (4539.5 mlg/kg) . The results showed a convergency in the concentrations of (Cu) in the parts of plant for the same sample (432.62 - 490.75 - 353.409 - 272.73 mlg/kg) in flowers , leaves , stems and roots in order . but the concentrations of (Fe) in roots was higher than that in flowers , leaves and stems for the same sample . In sample -5- the value of (Fe) in roots was (1124.91 mlg/kg) but in flowers , leaves and stems at the same sample was ( 234.83 - 218.82 - 205.24 mlg/kg ) in order.

Distribution of Nitrogen Diffusion Study Through Layer Surface of α – Iron

This paper aims to study the distribution of free nitrogen atoms through surface of α – Fe sample using the numerical solution for linear differential equation by means of Crank – Nicolson method at a temperature range ( 550 to 950 0C) and time interval (0 – 8)h where the nitrogen diffusion constant is at 850 0C and 8h. Under the supposed condition this study has illustrated that the diffusion depth of nitrogen atoms from surface towards inners reaches to ̴ 1.2mm, i.e., determining the layer thickness of the formed nitride compounds which gives the surface layer of α – Fe high resistance against corrosion processes resulting from surrounded environment.

Effect Of Foliar Application Of Iron And NPK Fertilization On Flowering, Setting And Vegetative Growth Of Halwani Lubnan And Kamali Grape Cultivars (Vitis vinifera L.)

This study was conducted during the seasons 1995 and 1996 at Ninevah Horticulture Station- Iraq. On Halwani and Kamali grape cultivars. This study included four levels of foliar application of Fe-EDTA at concentrations of 0, 50, 100 and 200 ppm iron, and soil compound fertilization with NPK (30 kg N + 30 kg P2O5 + 30kg K2O/ Donum) on the two abore mentioned cultivars, and the interaction among the three studied factors (cultivars, Fe and NPK), was also evaluated. The results showed that 200ppm of iron caused a significant increase in the percentage of pollen viability, Pollen grains germination, length of Pollen tube, setting of berries, ovules fertilization, leaf chlorophyll content, single leaf area, shoot leaf area, and total leaf area per vine and leaf area per cluster. The same results were obtained by using NPK fertilization. Halwani grape CV. Was significantly superior over on the Kamali grape CV. in pollen viabilits, pollen germination, length of pollen tube, leaf chlorophyll content and the single leaf area, While the Kamali grape CV. gave the highest shoot leaf area, total leaf area per vine and leaf area per cluster. The interaction among iron, NPK and cultivars reveded that the best treatment was 200 ppm iron with NPK, which gave the best results concerning flowering, setting and vegetative growth for both the cultivars.