Composite material of silver nano-particles (SNPs) and activated carbon was synthesized by wet chemical method. Morphology and particle size of SNPs were investigated by Scanning Electron Microscopy (SEM), Transmission Electron Microscopy (TEM) and X-ray powder diffraction (XRD). Particle size obtained from XRD data analysis using Debye Scherer formula comes out around 14nm while crystalline structure of SNPs was investigated as face centered cubic (fcc). Morphology of SNPs in activated carbon was studied using SEM. It shows well distributed, circular shaped SNPs and their agglomerates in pores of activated carbon. Presence of silver in the nano-composite was confirmed through Energy Dispersive X-ray (EDX) analysis. TEM shows majority of nanoparticles lying in the range between 10 to 20 nm while presence of metallic phase (fcc) of silver was further confirmed through electron diffraction studies. Microbiological activity of composite as antibacterial was examined through flow method, using open source water infected by Gram-negative (E. coli). One (1) gm. of nano-composite was found effective in sterilizing up to 55L of infected water. Antibacterial efficacy of the nano-composite was further verified against B. Subtilis and E. coli using disk diffusion method. Overall results show that composite material is a promising candidate for purification of open source water.

The aim of this work is to study the effect of ultra violet- C radiation, for different times and dissimilar distances, on internal structure (Molecular structure or chemical compound position and ordered) and medical contents (Enzymes, Free radical, Vitamins and Antioxidant activity) for ammimajus. The antioxidant activity for different solutions extract, (methanol, ethanol, ethyl acetate and acetone), from Ammimajus is increased with increasing their concentration. Antioxidant activity, total phenol content and Vitamins (C and E) for different solvents extract from Ammimajus are increased with increasing exposure time and decreased with increasing the distance from the source.

Ethiopian soils are recently reported to exhibit multi-nutrient deficiency such as K, S, Zn and B in addition to the conventional acclaimed growth limiting nutrients such as N and P. Legume crops including soybean can satisfy their N demand through biological N fixation. However, P and K nutrients should be supplied in optimal amount. Thus, taking the aforementioned premises in account, a study was conducted in Jabitehnan district of West Gojam Zone of Amhara region in 2015 and 2016 aimed at optimizing P and K fertilizer recommendations for soybean. Four levels of P (0, 10, 20, 30 P kg ha-1) and four levels of K (0, 10, 20 and 30 K kg ha-1) were combined in incomplete factorial arrangement with a diagnostic satellite treatment comprising S, Zn, Mg and B. The treatments were laid in RCBD with three replications. Phosphorus, K, S and Mg fertilizers were applied as basal application in the form of triple super phosphate (TSP), KCl, CaSO4 and MgO, respectively. While, the micronutrients Zn and B were applied as foliar application 45 days after planting. The agronomic data analysis results collected in both experimental years indicated that there was no significant yield response both to the application of P and K fertilizers and addition of other macro and micronutrients (S, Mg, Zn and B). However, it was observed that inoculation of soybean with TAL-379 potentially gave a better yield return compared to the control (non-inoculated) treatment with a yield advantage of 39.6%. Therefore, it can be concluded that application of P and K fertilizers did not significantly affect the yield of soybean in Jabi-Tehnan district. While, the strain TAL-379 can be recommended to improve yields of soybean in the mentioned district. However, further refinement of the response of soybean to P and K fertilizers considering other quality parameters apart from yield should be investigated.