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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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Book ChapterDOI
Sreepat Jain1
01 Jan 2020
TL;DR: Fungi, algae, non-vascular plants, and vascular non-seed-bearing plants present sporangia where the spores are produced, and spermatophytes (Pteridos permatophyta, gymnosperms, and angiosperms) produce pollens.
Abstract: Fungi, algae, non-vascular plants, and vascular non-seed-bearing plants present sporangia where the spores are produced, and spermatophytes (Pteridospermatophyta, gymnosperms, and angiosperms) produce pollens (see also Table 1). Spore is a haploid cell derived from sporangium via meiosis, whereas pollen is an immature, endosporic male gametophyte derived from male spores (microspores) in seed plants.
Journal ArticleDOI
TL;DR: In this article, the levels and associated risks of 18 organochlorine residues in water, soil, sediment, and five vegetables cultivated on abandoned mine areas were investigated by GC/MS.
Abstract: Aims: To investigate the levels and the associated risks of 18 organochlorine residues in water, soil, sediment, and five vegetables cultivated on abandoned mine areas. Study Design: Water, sediment, soil (at 0 -10cm, 11 – 20cn, 21 – 30cn) and vegetables samples were collected from the abandoned tin mine agricultural areas. These subsamples were separately combined and mixed so that a portion taken of the composite was representative of each subsample. The representative fractions were then treated for analysis Place and Duration of Study: Samples were collected between February and May 2020 from the cultivated abandoned mine areas in Du, Jos - South Local Government Area, Plateau State, Nigeria, Methodology Liquid–liquid extractions methods were used for the extraction of pesticide residues from water, sediment, soil and vegetables. The organochlorine residues were determined by GC/MS. Results: The physico- chemical properties data obtained for the soils/sediment from abandoned mine sites in Jos South were very heterogeneous, hence, various behaviors of pesticide residues in different soil/sediment matrices. There were no significant differences (P= 0.05) in mean minerals among the various samples. The pesticides residues detected in water were b-endosulfan, p,p-DDD and methoxychlor. The residues recorded in water were above the WHO’s MRL and Federal Food, Drug and Cosmetic Act (FFDCA,) for drinking water. Residues were also detected in sediment and soils samples. The 11 – 20cm subsoil accumulated the highest levels of the pesticide analyzed. The order of the accumulation of the OCP were; y-BHC>DDD>endrin>endrin ketone>a-endosulfan>b-endosulfan and of the sample type was water
Book ChapterDOI
01 Jan 2021
TL;DR: In this paper, the aerodynamic drag has a direct link to fuel consumption of the vehicle, which is a wind resistance force acting on the body of vehicle against the forward motion of vehicle causing higher fuel usage.
Abstract: In modern society, the automotive manufacturers more concerned about how to improve the fuel economy of the vehicle for saving energy and reduce the emissions from the vehicles to protect the environment. Aerodynamic drag, which is a wind resistance force acting on the body of vehicle against the forward motion of vehicle causing higher fuel usage. The aerodynamic drag has a direct link to fuel consumption of the vehicle. This work was done with the main aim of improving the aerodynamic outer body shape of ISUZU bus, a famous bus, being manufactured and famously used in Ethiopia. CFD analysis was done on the selected bus model for estimation of the drag force. The results obtained with CFD analysis done on modified bus outer body shape were compared with the aerodynamic drag acting on the existing shape of the vehicle. The fuel consumption and the related CO2 emissions were also estimated. Bus body models with modifications were prepared using CATIA and CFD analysis was done with Pheonix software. The selected speed range for analysis was from 80 to 120 kmph. From this work, it is observed that there is a great scope of reducing drag, fuel consumption and related CO2 emissions by modifying the shape of Isuzu bus. When compared to model 1, model 2, at a speed of 120 kmph registered great benefits, with saving of the fuel 5.17 L/h and 52.1 tons of CO2 emission reduction per year. The CFD results show that varying the pressure and velocity over rear and front side of vehicle got a great influence on the total drag acting on the vehicle.
DOI
01 Jan 2018
TL;DR: The results of the screening test revealed the presence of phytosterols, flavonoids, terpenoids, phenols, glycosides, and alkaloids.
Abstract: Ehretia cymosa (Boraginaceae) is an indigenous plant in Ethiopia traditionally used against various diseases including toothache, tetanus, dysentery, gastric ulcers and skin diseases. In view of its traditional use, the leaves were successively extracted on maceration with n-hexane, EtOAc and MeOH to furnish 15 g (3%), 2.63 g (0.5%) and 8.13 g (1.6), respectively. The extracts were subjected to qualitative phytochemical screening and the results of the screening test revealed the presence of phytosterols, flavonoids, terpenoids, phenols, glycosides, and alkaloids. The n-haxane extract after silica gel column chromatography yielded four compounds identified with IR and NMR as compound 1, α-amyrin (2), β-amyrin (3) and bauerenol (4). Similar attempt made to isolate compounds from the EtOAc extract has led to the isolation of same compounds. Compound 1 has not been reported from this genus. The extracts and compound 1 were tested for their antibacterial activity using paper disc diffusion method against two bacterial pathogens such as Pseudomonas aeruginosa and Staphylococcus aureus. The methanol extract displayed remarkable activity against P. aeruginosa with inhibition zone of 30 mm at 25 mg/mL. The result is significant compared with gentamicin (22 mm at 25 mg/mL) as positive control. The antibacterial activity presented herein has demonstrated that all the extracts and compound 1 were active against all the tested bacterial species with the methanol extract exhibited the best activity comparable with the standard drug. Thus the present study supported the traditional use of the leaves of E. cymosa against bacteria. Key words: Boraginaceae, Ehretia cymosa, Antibacterial activity, NMR, α-amyrin, β-amyrin, bauerenol
Journal ArticleDOI
TL;DR: In this article, a computational survey was carried out for the Trametes hirsuta strain 072 genome with the open reading frames from the National Center for Biotechnology Information database.

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