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Asian Pacific Journal of Tropical Biomedicine 2017年第2期7卷 121-125页

作者： solomon Habtemariam George Kabakasseril Varghese Pharmacognosy Research Laboratories&Herbal Analysis Services Medway School of ScienceUniversity of GreenwichChatham-MaritimeKent ME4 4TBUK Department of Botany St.Berchmans'CollegeChanganasseryKottayam 686101KeralaIndia

Objective: To investigate the antioxidant, anti-a-glucosidase and pancreatic b-cell protective potential of Ensete superbum(E. superbum) ***: A variety of in vitro assays including radical scavenging, reducing power potential, phenolic content determination, a-glucosidase assay and pancreatic b-cell(1.4E7 cells) viability were employed for assessing the effect of methanolic extract of E. superbum ***: The radical scavenging and reducing power effects comparable with the standard rutin were obtained while the enzyme inhibitory activity of the extract was 68-fold better than the standard antidiabetic drug, acarbose. The seed extract of E. superbum was packed-full of polyphenols with mean percentage gallic acid equivalent value of(38.2 ± 1.8)(n = 3). The protection of pancreatic cells from massive onslaught of hydrogen peroxide was far superior to that obtained for ***: The reputed antidiabetic therapeutic uses of the seeds extract of E. superbum may be justified on the basis of inhibition of carbohydrate enzymes, antioxidant effects and pancreatic b-cell protection.

关键词： Ensete superbum Musaceae Seeds Antioxidant Pancreatic beta-cell protection Alpha-glucosidase inhibition

Soil and water conservation effects on soil properties in the Middle Silluh Valley,northern Ethiopia

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International Soil and Water Conservation Research 2017年第3期5卷 231-240页

作者： solomon Hishe James Lyimo Woldeamlak Bewket Department of Geography and Environmental Studies Mekelle UniversityMekelleEthiopia Institute of Resources Assessment University of Dar es SalaamTanzania Department of Geography and Environmental Studies Addis Ababa UniversityAddis AbabaEthiopia

Community-based Soil and Water Conservation(SWC)practices have been adopted in the Tigray region since 1991 for restoration of the degraded *** effects of those conservation measures on physico-chemical properties of soil were limitedly ***,this study evaluated the effects of SWC on selected soil properties in the Middle Silluh Valley,Tigray region,Northern *** study considered conserved landscapes(terraced hillside,terraced farmland and exclosure area)and non-conserved landscapes(non-terraced hillside,non-terraced farmland and open grazing land)for comparison using a one-way analysis of variance(ANOVA).A total of 24 samples were collected from each landscape at a depth of 10–30 *** results indicated that mean bulk density(BD)was low on terraced hillside,non-terraced hillside and exclosure *** and clay content were significantly different at P<0.05 for the six landscape *** mean organic matter was observed in the conserved landscape,as compared with the corresponding non-conserved ***'s correlation between Soil Organic Matter(SOM)and clay content,SOM and Total Nitrogen(TN)showed strong positive ***,the results show that SWC had significantly positive effects on soil's physical and chemical properties in the study area.

关键词： Land degradation Soil and water conservation Soil properties Middle Silluh Valley Ethiopia

Effects of dynamo magnetic fields on observational properties of accreting millisecond X-ray pulsars

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Research in Astronomy and Astrophysics 2021年第1期21卷 229-237页

作者： Dugasa Belay Zeleke solomon Belay Tessema Seblu Humne Negu Ehtiopian Space Science and Technology Institute(ESSTI)Entoto Observatory and Research Center(EORC) Astronomy and Astrophysics Research and Development DepartmentP.O.Box 33679 Addis AbabaEthiopia

In this paper,we have investigated accreting millisecond X-ray pulsars,which are rapidly rotating neutron stars in low-mass X-ray *** systems exhibit coherent X-ray pulsations that arise when the accretion flow is magnetically channeled to the stellar ***,we have developed the fundamental equations for an accretion disk around accreting millisecond X-ray pulsars in the presence of a dynamo generated magnetic field in the inner part of the *** have also formulated the numerical method for the structure equations in the inner region of the disk and the highest accretion rate is enough to form the inner region of the disk,which is overpowered by radiation pressure and electron ***,we have examined our results with the effects of dynamo magnetic fields on accreting millisecond X-ray pulsars.

关键词： Accretion disk neutron stars,pulsars millisecond X-ray pulsars

Roadside vehicle particulate matter concentration estimation using artificial neural network model in Addis Ababa,Ethiopia

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Journal of Environmental Sciences 2021年第3期33卷 428-439页

作者： solomon Neway Jida Jean-François Hetet Pascal Chesse Awoke Guadie Research Laboratory in Hydrodynamics Energetics&Atmospheric Environment(LHEEA)École Centrale de NantesNantes 44300France Department of Mechanical Engineering Faculty of Mechanical&Production EngineeringInstitute of TechnologyArba Minch UniversityArba Minch 21Ethiopia Key Laboratory of Environmental Biotechnology Research Center for Eco-Environmental Sciences Chinese Academy of SciencesBeijing 100085China Department of Biology College of Natural SciencesArba Minch UniversityArba Minch 21Ethiopia

Currently,vehicle-related particulate matter is the main determinant air pollution in the urban *** study was designed to investigate the level of fine(PM_(2.5))and coarse particle(PM_(10))concentration of roadside vehicles in Addis Ababa,the capital city of Ethiopia using artificial neural network *** train,test and validate the model,the traffic volume,weather data and particulate matter concentrations were collected from 15 different sites in the *** experimental results showed that the city average 24-hr PM_(2.5)concentration is 13%-144%and 58%-241%higher than air quality index(AQI)and world health organization(WHO)standards,*** PM_(10)results also exceeded the AQI(54%-65%)and WHO(8%-395%)*** model runs using the Levenberg-Marquardt(Trainlm)and the Scaled Conjugate Gradient(Trainscg)and comparison were performed,to identify the minimum fractional error between the observed and the predicted *** two models were determined using the correlation coefficient and other statistical *** Trainscg model,the average concentration of PM_(2.5)and PM_(10)exhaust emission correlation coefficient were predicted to be(R^(2)=0.775)and(R^(2)=0.92),*** Trainlm model has also well predicted the exhaust emission of PM_(2.5)(R~2=0.943)and PM_(10)(R^(2)=0.959).The overall results showed that a better correlation coefficient obtained in the Trainlm model,could be considered as optional methods to predict transport-related particulate matter concentration emission using traffic volume and weather data for Ethiopia cities and other countries that have similar geographical and development settings.

关键词： Addis Ababa Artificial neural network PM prediction Roadside emission

Atrazine biodegradation efficiency, metabolite detection, and trzD gene expression by enrichment bacterial cultures from agricultural soil

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Journal of Zhejiang University-Science B(Biomedicine & Biotechnology) 2013年第12期14卷 1162-1172页

作者： Robinson David Jebakumar solomon Amit KUMAR Velayudhan SATHEEJA SANTHI Department of Molecular Microbiology School of Biotechnology Madurai Kamaraj University

Atrazine is a selective herbicide used in agricultural fields to control the emergence of broadleaf and grassy weeds. The persistence of this herbicide is influenced by the metabolic action of habituated native microorganisms. This study provides information on the occurrence of atrazine mineralizing bacterial strains with faster metabolizing ability. The enrichment cultures were tested for the biodegradation of atrazine by high-performance liquid chromatography(HPLC) and mass spectrometry. Nine cultures ***01 to ***01 were identified as the degrader of atrazine in the enrichment culture. The three isolates ***01, ***01, and ***01 were identified as efficient atrazine metabolizers. Isolates ***01 and ***01 produced hydroxyatrazine(HA) N-isopropylammelide and cyanuric acid by dealkylation reaction. The isolate ***01 generated deethylatrazine(DEA), deisopropylatrazine(DIA), and cyanuric acid by N-dealkylation in the upper degradation pathway and later it incorporated cyanuric acid in their biomass by the lower degradation pathway. The optimum pH for degrading atrazine by ***01 was 7.0 and 16S rDNA phylogenetic typing identified it as Enterobacter cloacae strain ***01. The highest atrazine mineralization was observed in case of isolate ***01, where an ample amount of trzD mRNA was quantified at 72 h of incubation with atrazine. Atrazine bioremediating isolate E. cloacae strain ***01 could be the better environmental remediator of agricultural soils and the crop fields contaminated with atrazine could be the source of the efficient biodegrading microbial strains for the environmental cleanup process.

关键词： Atrazine Biodegradation Enterobacter cloacae Deethylatrazine Cyanuric acid trzD gene

Co-processing Vacuum Residue with Waste Plastics in a Delayed Coking Process:Kinetics and Modeling

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China Petroleum Processing & Petrochemical Technology 2012年第3期14卷 44-49页

作者： Mominou Nchare Shen Benxian solomon G.Anagho School of Geology Mining and Minerals Processing(E.G.E.M de Meiganga)University of NgaoundereP.O.Box 454 NgaoundereRepublic of Cameroon Petroleum Processing Research Center East China University of Science and Technology Department of Chemistry Faculty of ScienceUniversity of DschangDschangRepublic of Cameroon

Thermal upgrading of vacuum residue mixed with waste plastics was studied in a laboratory scale delayed coking *** model of feed thermal decomposition was set up and the first order reaction kinetics was used to predict products distribution during the coking *** distillate yield was higher(70%) for the vacuum residue/polystyrene(VR/PS) feed system and the vacuum residue/low density polyethylene(VR/LDPE) feed *** resulted distillate yield was separated into fractions according to their boiling points,with gasoline and diesel being our fractions of *** activation energy was higher for gasoline production(around 60 kcal/mol) varying with the type of feed system,while it was 33 kcal/mol for diesel *** regression coefficient R was 0.990.

关键词： delayed coking waste plastics vacuum residue kinetics

Spatio-temporal patterns and changes in environmental attitudes and place attachment in Gauteng, South Africa

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Geo-Spatial Information Science 2021年第4期24卷 666-677页

作者： Simangele Dlamini solomon G.Tesfamichael Gregory D.Breetzke Tholang Mokhele Department of Geography Environmental Management and Energy StudiesUniversity of JohannesburgJohannesburgSouth Africa Geospatial Analytics eResearch Knowledge CentreHuman Sciences Research CouncilPretoriaSouth Africa Department of Geography Geoinformatics and MeteorologyUniversity of PretoriaPretoriaSouth Africa

In this study,we employed a number of geospatial techniques to examine the spatiotemporal patterns and changes of environmental attitudes and place attachment values in the Gauteng province of South *** data were obtained from the Gauteng City Region Observatory’s Quality of Life Survey collected at three separate points in time,namely 2013,2015,and *** indicated that wards(smallest administrative and analysis units)located on the urban periphery of Gauteng,which are generally less affluent,largely held more negative environmental attitudes and place attachment values during the three time *** contrast,centrally located wards,which are generally more affluent,expressed more positive environmental attitudes but less place attachment values,especially in *** findings of this research not only highlight the complex spatio-temporal distribution of environmental attitudes and place attachment values throughout Gauteng but also empha-size the need for spatially targeted state interventions for future environmental planning within the province.

关键词： Spatio-temporal changes environmental attitudes place attachment Gauteng spatial patterns

Essential Echocardiography 2007

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Rehabilitation of indigenous browse plant species following exclosure established on communal grazing lands in South Tigray, Ethiopia, and implication for conservation

丛书名： Contemporary Cardiology

2007年

作者： Scott D. solomon

来源：畅想之星图书光盘版（南... 评论

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Ecological Processes 2019年第1期8卷 530-538页

作者： Tesfay Atsbha solomon Wayu Nguse Gebretsadkan Tesfay Gebremariam Tsgehiwet Giday Tigray Agricultural Research Institute Alamata Agriculture Research CenterP.O.Box56AlamataEthiopia

Background:Despite the wide use of indigenous browse plant species,there is almost no information on the rehabilitation of indigenous browse species following area exclosure(AE)established on communal grazing lands(CGL)in Southern *** objectives of this study were to assess the rehabilitation of browse plant species following AE establishment on CGL.A total of 61 and 59 plots of 10×10m2 size were laid down at 50-m intervals along parallel line transects at AE and GCL,*** collected on vegetation attributes were subjected to analysis of t test(unequal variances)using ***:The Shannon diversity index of the browse plant species was 1.25 and 0.81 in AE and CGL,respectively(P<0.001).The overall population structure of browse plant species in the AE shows a reverse J-shaped population curve and“good”regeneration status,which reveals that the future communities may be *** biomass and basal area of browse plant species were significantly higher in the AE than in CGL(P<0.001).After exclusion of grazing,AE was found to have positive effects on diversity and aboveground biomass of browse plant ***:The study gives an understanding of the diversity,the pattern of population and regeneration of the browse plant species,which may help in the management and conservation of the *** results indicate that grazing exclusion is an effective management strategy to restore browse plant *** concluded that the establishment of AE had a positive effect on the rehabilitation of browse plant species diversity and improved population structure and regeneration potentials of degraded grazing ***-term monitoring and evaluation systems will be required to gain an informed understanding of the roles played by area exclosures in the rehabilitation and conservation of browse palnt species diversity.

关键词： Browse Rehabilitation Restoration

Improving the Enzyme Catalytic Efficiency Using Ionic Liquids with Kosmotropic Anions

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Chinese Journal of Chemistry 2006年第4期24卷 580-584页

作者：赵华 CAMPBELL, Sophia solomon, Jonathan 宋志炎 OLUBAJO, Olarongbe Chemistry Program Savannah State University Savannah Georgia 31404 USA

The kosmotropicity of cations and anions in ionic liquids has a strong influence on the enzyme catalytic efficiency in aqueous environments. The kosmotropic anion CF3COO^- seemed to activate the protease, and the chao... 详细信息

关键词： enzyme biocatalysis activity ionic liquid kosmotropicity kosmotrope chaotrope