The result shows as Grade 9 and grade 10 students never do practical work in the lab but grade 11 and grade 12 students sometimes conduct practical work in the lab. This may be one of the reasons why only 8,688 (11.5%) students have joined the natural science field according to the ...
edulis (Agew potato) grown in the Dangila, Ankesha, and Banja districts in the Awi zone of the Amhara region, Ethiopia. The proximate composition was determined via the Association of Official Analytical Chemists (AOAC) protocol. The moisture, ash, crude fat, crude protein, crude fiber, ...
Diagnosing the Diagnostics: Misconceptions of Twelfth Grade Students on Selected Chemistry Concepts in Two Preparatory Schools in Eastern Ethiopia This article aimed at diagnosing suspected students' misconceptions towards the selected five chemistry concepts (valence, oxidation number, coordination number, numb...
摘要:Four Arabica coffees (Brazil, Colombia, Ethiopia, and Guatemala) yield highly variant odours, attesting to the complexities of coffee aroma that command advanced analytical tools. In this study, their volatiles were extracted using solvent-assisted flavour evaporation (SAFE) and headspace solid-...
(WHO2011), and less than Ni concentrations that ranged from 17 to 455 mg/L on surface water chemistry of Werii catchment, Tigray, Ethiopia (Haftu and Estifanos2020). Nickel comes from discharges of industrial and municipal wastes into the river (Ubuoh et al.2010,2021; Zaigham et al.2012...
[11] have carried out an investigation on high grade Zn–Pb bearing ore using mixed moderate thermophilic microorganisms. The results showed that the highest zinc recovery, 98.5%, was obtained during 25 days with pulp density 50 (g/L). A. ferrooxidans, isolated from native province of lead–...
Kama Illias. Chemistry to Music: Discovering how Music-Based Teaching Affects Academic Achievement and Student Motivation in an 8th Grade Science Class in Debremarkos Elementary school. Teachers should have access to new and innovative tools in order to
SABIC's extensive portfolio of light-weighting materials was also extended this year with the introduction of a new grade of ULTEM™ foam. Lighter than ever, and fully compatible with thermosets and metal laminates, the new formulation provides a core for 'sandwich' construction, lending itself ...
Egypt has also voiced concern over Africa’s immense Grand Millennium Dam, a hydroelectric dam under construction on the Nile in Ethiopia [18]. The problem of water scarcity and pollution has also advanced a new concept, “Eco-peace” that has spurred cooperation between Israel and Jordan to ...
removal efficiency in comparison to other three adsorbents. With pH up to 5.5, the percentage of fluoride adsorption onto refractory grade bauxite was found to increase but decreased with increase in pH. The adsorption process was found to be exothermic hence the adsorption efficiencies decreased ...