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Institution

Adama University

EducationNazrēt, Ethiopia
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.


Papers
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Journal ArticleDOI
TL;DR: Green ZnO NPs exhibited better antibacterial and antifungal activities, in addition to superior photocatalytic behaviour.

14 citations

Journal ArticleDOI
TL;DR: Commafric A possessed anti-proliferative activity against non-small cell lung cancer (A549), which suggests that commafrica A has potential to be further optimized being a lead compound in the search for new drugs against cancer diseases.
Abstract: Myrrh, a resin derived from the damaged bark of Commiphora genus, has traditionally been used for treatment of various human diseases, such as amenorrhea, ache, tumors, fever, and stomach pains. In spite of this widespread use of the myrrh in Ethiopia, the pharmacological activity and chemical composition have not been studied in detail. A new tricyclic triterpene acid (3S,4S,14S,7E,17E,21Z)-3,30-dihydroxypodioda-7,17,21-trien-4-carboxylic acid (commafric A) has been isolated from a crude methanolic extract of Commiphora africana (A. Rich.) Engl. resin along with the known pentacyclic triterpene α-amyrin. The structure of commafric A was characterized using different spectroscopic techniques such as 1D and 2D NMR, IR, and VCD combined with computations. The anti-proliferative activity of both isolated compounds was evaluated using SRB based colorimetric cellular assay against four human cancer cell lines. Etoposide was used as a positive control. Commafric A showed significant anti-proliferative effects against non-small cell lung cancer (A549) with IC50 values of 4.52 μg/ml. The pentacyclic triterpene α-amyrin showed a weak anti-proliferative activity against A2780 (ovarian cancer), MIA-PaCa-2 (pancreatic cancer), and SNU638 (stomach cancer) cell lines tested with IC50 values ranging 9.28 to 28.22 μg/ml. Commafric A possessed anti-proliferative activity against non-small cell lung cancer (A549), which suggests that commafric A has potential to be further optimized being a lead compound in the search for new drugs against cancer diseases.

14 citations

Journal ArticleDOI
01 Jan 2021
TL;DR: Graphene has been a prominent choice as a base material for supporting varieties of inorganic and organic materials in scientific research and innovation due to its superior physico-chemical properties as mentioned in this paper.
Abstract: Graphene has been a prominent choice as a base material for supporting varieties of inorganic and organic materials in scientific research and innovation due to its superior physico-chemical properties. Electrochemical sensors have been prepared by the use of a variety of nanoparticles and based on graphene which effectively supported on the surface of glassy carbon electrode through different methods. Graphene supported sensors have been utilized to detect and determine different electroactive species in samples. Many characterization techniques such as Powder X-ray diffraction (XRD), Energy dispersion spectroscopy (EDS), X-ray photoelectron spectroscopy (XPS), UV–Vis spectroscopy, Fourier transform infrared (FTIR) spectroscopy, Raman spectroscopy, High-resolution transmission electron microscopy (HRTEM), Scanning electron microscopy (SEM), transmission electron microscopy (TEM), and atomic force microscopy (AFM) have been successfully applied to explore the properties of graphene supported nanomaterials. Applications of the sensors have been assessed using signals from electrochemical measurements such as: cyclic voltammetry (CV), electrochemical impedance spectroscopy (EIS), and Differential pulse voltammetry (DPV). The results obtained from these measurements have data of wide liner range with small detection limit. Most of the results also clarified that the sensors were used to detect respective species with high sensitivity, and good stability. The electrochemical sensing of H2O2, hydrazine, dopamine, sunset yellow, flavonoids, caffeine, glucose, L-lactic acid, chrysophanol, etc., by graphene and graphene oxide-based nanomaterials has also been discussed in detail. This fact proved that there is a bright future for the development of portable sensors used in a variety of applications. The present review is focussed on exploring the synthetic methods, characterization and sensor applications of various graphene supported nanomaterials.

14 citations

Journal ArticleDOI
01 Jan 2021
TL;DR: In this article, a dye-sensitized solar cells (DSSCs) were fabricated using dye extracts from Baobab and Shea leaves as photo sensitizers, and the photoanode was made from spin-coating of titanium dioxide (TiO2) and annealed at 450 °C for 1.5h.
Abstract: Dye-sensitized solar cells (DSSCs) were fabricated using dye extracts from Baobab and Shea leaves as photo-sensitizers. The photoanode was made from spin-coating of titanium dioxide (TiO2) and annealed at 450 °C for 1 ​h. The TiO2 shows good optical absorption capability in the ultraviolet region with a band gap of 3.3 ​eV and surface morphology that revealed grains that are spherical and randomly oriented with average particle size of ( 26 ± 4.0 ) nm. The Shea and Baobab dyes have shown absorption at the blue-yellow region of the visible light with energy band gap of 1.66 ​eV and 1.89 ​eV respectively. The Shea-based DSSC (SDSSC) yielded power conversion efficiency (PCE) of ( 0.25 ± 0.13 ) % with short current density, J s c , open-circuit voltage, V o c and fill factor, F F of ( 2.66 ± 1.61 ) m A c m − 2 , ( 0.158 ± 0.0877 ) V and 0.596 ​± ​0.389, respectively while Baobab-based DSSCs (BDSSCs) gave lower PCE of ( 0.11 ± 0.028 ) % with J s c , V o c and F F of ( 0.286 ± 0.0483 ) m A c m − 2 , 0.676 ± 0.0622 V and 0.592 ± 0.0339 . Light soaking tests show that SDSSCs are more stable in photoelectric performance than BDSSCs for 5 ​h. Hence, preferred as a sensitizer for better performance in dye-sensitized solar cells than Baobab dye extract.

14 citations

Journal ArticleDOI
TL;DR: The major compounds obtained from GC/MS analysis of the polymer recovered from the isolate BNP-92 were 2-butenoic acid, methyl ester, ethyl cyclopropanecarboxylate, and 1-Undecanol which corresponds to and have produced from PHA after thermal degradation.

14 citations


Authors

Showing all 856 results

NameH-indexPapersCitations
Delfim F. M. Torres6070114369
Trilok Singh5437310286
Dattatray J. Late4620511647
Jung Ho Je403286264
Gobena Ameni372074732
Jong Heo372555289
Mahendra A. More362684871
Gyanendra Singh322483198
Dilip S. Joag301273014
Tesfaye Biftu281293225
Salmah Ismail22792151
Rabab Mohammed21921785
Mooha Lee1649821
T. Ganesh1526735
Pandi Anandakumar1518777
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Performance
Metrics
No. of papers from the Institution in previous years
YearPapers
20239
202226
2021332
2020203
2019125
2018101