Adama University

About: Adama University is a education organization based out in Nazrēt, Ethiopia. It is known for research contribution in the topics: Population & Adsorption. The organization has 840 authors who have published 1010 publications receiving 5547 citations. The organization is also known as: Adama Science and Technology University & ቴክኖሎጂ ዩኒቨርሲቲ, አዳማ ሳይንስና ቴክኖሎጂ ዩኒቨርሲቲ.

Structure, morphology and electrochemical properties of SrTiO3 perovskite: Photocatalytic and supercapacitor applications

Abstract: In order to explore an alternative photocatalyst for environmental remediation, we report the sol-gel process for the synthesis of strontium titanate (SrTiO3) nanoparticles (STNPs). The as-synthesized STNPs were found to poses cubic perovskite-type crystal structure with an average crystallite size of 22 nm were well-characterized by X-ray diffraction (XRD). The agglomerated and cubic like morphologies were identified by using scanning electron microscopy (SEM). The elemental analysis by energy dispersive X-Ray spectroscopy (EDAX) confirmed the composition of STNPs. The synthesized nanoparticles were further characterized by Fourier transform infrared (FTIR) analysis. STNPs displayed good photocatalytic degradation activity for malachite green (MG) and rhodamine blue (Rh–B) dye pollutants under UV light irradiation in the time duration of 120 min. Furthermore, cyclic voltammetric studies revealed that the STNP electrode, because of its increased surface area, produced maximal specific capacitance of 208.47 Fg−1 at 1 mA/cm2 with a high cycle stability of 1500 cycles. The superior supercapacitance behaviour of SrTiO3 electrode materials strengthens its stance to be developed as a highly promising material for energy related applications. In addition, STNPs can serve as better materials for the environmental remediation of pollutant dyes.

Eigensolutions and expectation values of shifted-rotating Möbius squared oscillator

Abstract: In this paper we have employed exact quantization rule and the Hellman–Feynman theorem to obtain bound states eigensolutions and expectation values of the shifted-rotating Mobius squared oscillator, and we have used the Pekeris-like approximation recipe to effect solution for bound states energy eigenspectra, and in solving the Riccati equation for the eigenfunctions, cases of Q ≠ 0 and Q = 0 were considered in our solutions. We have also applied our derived formulas to compute numerical values to the spectroscopic parameters of four diatomic molecules: CO, LiH, H2 and ICl. Our analysis showed that numerical results we obtained for potential parameters, bound states energy eigenspectra and expectation values are consistent with available data in the literature and that molecular interactions in CO, LiH, H2 and ICl are best described by improved Wei oscillator than by Morse oscillator.

Knowledge about child birth and postpartum obstetric danger signs and associated factors among mothers in Dale district, Southern Ethiopia

Abstract: Globally, every day, approximately 800 women die from preventable causes related to pregnancy and childbirth. The majority of these deaths occur after childbirth (post-partum period) mostly within 24 h. Raising awareness of women on obstetric danger sign of childbirth and postpartum, are crucial for safe motherhood initiative and to reduce maternal mortality. A community based cross sectional study was conducted from December 15, 2017 up to February 10, 2018 on randomly selected sample of 782 women who had at least one delivery in the last 12 months. Multi stage sampling technique was used to select the study participants. Pre tested structured questionnaire was used to collect quantitative data. Bivariate and multivariate logistic regression analyses were performed using SPSS version 20.0 software. Total 732 women who had at least one birth prior to this survey were interviewed and making a response rate of 93.6%.The most common spontaneously mentioned danger signs during childbirth was Severe vaginal bleeding by 281 (68.4%). Women who could mention at least two danger signs during child birth and post-partum period were 333 (45.5%), 213(29.1%) respectively. Being urban (AOR = 3.54, 95% of CI: [2.20–5.69] and delivered previous birth at health institution (AOR = 3.35, 95% of CI: [2.38–4.72]) were factors found to be significantly associated with knowledge of danger signs during postpartum. Being Attended secondary level and above (AOR = 2.41, 95% of CI: [1.02–7.76]) and use of ANC during last pregnancy (AOR = 3.63, 95% of CI: [2.51–5.25]), were factors found to be significantly associated with knowledge of danger signs during childbirth. The level of knowledge about danger signs of child birth and postpartum were low. This indicates that many mothers are more likely to delay in deciding to seek health care. Also, knowledge about danger signs of childbirth and postpartum were affected by place of residence, formal education, use of ANC and place of delivery. Therefore, the identified gap in awareness should be addressed through effective maternal health services by strengthening and designing appropriate strategies including provision of targeted health information, education and communication.

Zircon Trace Element Constraints on the Evolution of the Paleoproterozoic Birimian Granitoids of the West African Craton (Ghana)

Abstract: The Paleoproterozoic Birimian granitoids of the West African Craton (WAC) in the northwestern part of Ghana, have been studied for their zircon trace elements concentrations to infer the source characteristics, origin, and magmatic evolution. The zircons in the granitoids have Th/U ratios ranging from 0.03 to 1.55, and display depleted light rare earth elements (LREE) and enriched heavy rare earth elements (HREE) contents, characterized by pronounced positive to negative anomalies of Eu (Eu/Eu*=0.14–0.98 and 1.01–6.06, respectively) and Ce (Ce/Ce*=0.08–0.98 and 1.02–116, respectively), which may imply that they were derived from both magmatic and hydrothermal sources. The geochemical plots of U/Yb vs. Y and Hf, the positive correlation between Hf and the other high field strength elements (HFSE) and high rare earth elements (REE) contents, with enrichment in Ce and depletion in Eu, indicate that the granitoids possibly formed from partial melting of the crust. The trace elements characteristics (i.e., wide range of Hf, Ce/Ce*, Th/U and Zr/Hf values) of the zircons suggest that crystallization of the magma occurred under variable oxidation states, which spanned over a longer period, implying that our data corroborate interpretations from studies of whole-rock geochemistry and geochronology on the granitoids of northwestern Ghana. This further indicates that the evolution of the Birimian granitoids in this part of the WAC occurred earlier than what had been reported in the literature.