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27篇 您的检索式:作者名="Amanuel"
    题名 作者 年代 出处 被引量
1Vegetation cover density and disturbance affected arbuscular mycorrhiza fungi spore density and root colonization in a dry Afromontane forest, northern Ethiopia显示文摘Arbuscular mycorrhiza fungi(AMF) are vital in the regeneration of vegetation in disturbed ecosystems due to their numerous ecological advantages and therefore are good indicators of soil and ecosystem health at large. This study was aimed at determining how the seasonal, vegetation cover density, edaphic and anthropogenic factors affect AMF root colonization(RC) and spore density(SD)in Desa'a dry Afromontane forest. AMF RC and SD in the rhizosphere of five dominant woody species, Juniperus procera, Olea europaea, Maytenus arbutifolia, Carissa spinarum and Dodonaea angustifolia growing in Desa'a forest were studied during the rainy and the dry seasons in three permanent study vegetation cover density plots(dense, medium, and poor). Each plot(160 x40 m^2) has two management practices(fenced and unfenced plots) of area. A 100 g sample of rhizosphere soil from moisturefree composite soil was used to determine spore density.Spore density ranged from 50 to 4467 spores/100 g soil,and all species were colonized by AMF within a range of 4–95%. Glomus was the dominant genus in the rhizosphere of all species. Vegetation cover density strongly affected SD and RC. The SD was significantly higher(p < 0.05) in the poor vegetation cover density than in the other two and lowest in the dense cover; root colonization showed the reverse trend. Management practices significantly(p <0.05) influenced AMF SD and RC, with the fenced plots being more favoured. Seasons significantly(p < 0.05) affected RC and SD. More RC and SD were observed in the wet period than the dry period. Correlating AMF SD and RC with soil physical and chemical properties showed no significant difference(p> 0.05) except for total nitrogen. Disturbance, vegetation cover density, season and total nitrogen are significant factors that control the dynamics and management interventions to maintain the forest health of dry Afromontane forests.Emiru Birhane Nakiguli Fatumah Kidane Gidey Amanuel Zenebe Ssemwanga Mohammed 2018Journal of Forestry Research2018,29,3:5
280年来埃塞俄比亚北部高原土地利用/覆被变化(英文)显示文摘Despite many studies on land degradation in the Highlands of Northern Ethiopia, quantitative information regarding long-term changes in land use/cover(LUC) is rare. Hence, this study aims to investigate the LUC changes in the Geba catchment(5142 km2), Northern Ethiopia, over 80 years(1935–2014). Aerial photographs(APs) of the 1930 s and Google Earth(GE) images(2014) were used. The point-count technique was utilized by overlaying a grid on APs and GE images. The occurrence of cropland, forest, grassland, shrubland, bare land, built-up areas and water body was counted to compute their fractions. A multivariate adaptive regression spline was applied to identify the explanatory factors of LUC and to create fractional maps of LUC. The results indicate significant changes of most types, except for forest and cropland. In the 1930 s, shrubland(48%) was dominant, followed by cropland(39%). The fraction of cropland in 2014(42%) remained approximately the same as in the 1930 s, while shrubland significantly dropped to 37%. Forests shrank further from a meagre 6.3% in the 1930 s to 2.3% in 2014. High overall accuracies(93% and 83%) and strong Kappa coefficients(89% and 72%) for point counts and fractional maps respectively indicate the validity of the techniques used for LUC mapping.ETEFA Guyassa Amaury FRANKL Sil LANCKRIET BIADGILGN Demissie GEBREYOHANNES Zenebe AMANUEL Zenebe Jean POESEN Jan NYSSEN 2018Journal of Geographical Sciences2018,28,10:3
3Superficial cervico-vaginal myofibroblastoma: a report of five cases 显示文摘STEWART C J AMANUEL B BRENNAN B A 2005Pathology2005,37,:1
4Wind load on ridge and field tiles on a residential building: a full scale study显示文摘Amanuel T Girma T B Arindam G C 2014Advances in Hurricane Engineering2014,36,1:1
5Fast repair of damaged RC beams using UV curing FRP composites显示文摘Guoqiang Li Amanuel Ghebreyesus 2006Composite Structures2006,,72:1
6Microsatellite instabili- ty in colorectal cancer 显示文摘Iacopetta B Grieu F Amanuel B 2010Asia Pac J Clin Oncol2010,6,4:1
7Fast repair of damaged RC beams using UV curing FRP composites显示文摘Guoqiang Li Amanuel Ghebreyesus 2004Composite Structures2004,,1:1
8Is it pay levels or pay raises that matter to fairness and turnover?显示文摘Amanuel G.Tekleab Kathryn M.Bartol WeiLiu 2005Behav2005,,8:1
9Trust-opportunism paradox, relationalism, and performance in interfirm relationships: Evidence from the retail industry显示文摘Augustine A Lado Rajiv R Dant and Amanuel G Tekleab 2007Strategic Management Journal2007,29,4:1
10Effects of physical confinement( < 125 nm)on the curing behavior of phenolic resin 显示文摘Samuel Amanuel 2006Journal of Applied Polymer Science2006,99,:1
11Microsatellite instability in col- orectal cancer显示文摘lacopetta B Grieu F Amanuel B 2010Asia Pac J Clin Oncol2010,6,4:1
12Use-wear analysis of obsidian artifacts from Later Stone Age shell midden sites on the Red Sea Coast of Eritrea, with experimental results显示文摘Amanuel Beyin 2010Journal of Archaeological Science2010,,7:1
13Characterization of manganese and iron oxides as combustion catalysts for propane and propene 显示文摘Marco Baldi Vicente Sanchez Escribano Jos Amanuel Gallardo Amores 1998Applied Catalysis B: Environmental1998,17,3:1
14Miscrosatellite instability in colorectal cancer显示文摘Iacopetta B Grieu F Amanuel E 2010Clinical Oncology2010,6,4:1
15Modeling the interface of metal-plate-connected tension-splice joint by finite element method显示文摘Amanuel S Gebremedhind S Boedo J 2000Transactions of the ASAE2000,43,5:1
16APractical Approach to Difficult Urinary Catheterizations显示文摘Cameron Ghaffary Amanuel Yohannes Carlos Villanueva 2013Curr UrolRep2013,,14:1
17Superficial cervico-vaginal myofibroblastoma: a report of five cases显示文摘STEWART C J AMANUEL B BRENNAN B A 2005Pathol2005,37,:1
18The prevalence and associated factors for delayed presentation for HIV care among tuberculosis/HIV co-infected patients in Southwest Ethiopia: a retrospective observational cohort显示文摘Background:A delay presentation for human immunodeficiency virus(HIV)patient’s care(that is late engagement to HIV care due to delayed HIV testing or delayed linkage for HIV care after the diagnosis of HIV positive)is a critical step in the series of HIV patient care continuum.In Ethiopia,delayed presentation(DP)for HIV care among vulnerable groups such as tuberculosis(Tb)/HIV co-infected patients has not been assessed.We aimed to assess the prevalence of and factors associated with DP(CD4<200 cells/μl at first visit)among Tb/HIV co-infected patients in southwest Ethiopia.Methods:A retrospective observational cohort study collated Tb/HIV data from Jimma University Teaching Hospital for the period of September 2010 and August 2012.The data analysis used logistic regression model at P value of≤0.05 in the final model.Results:The prevalence of DP among Tb/HIV co-infected patients was 59.9%.Tb/HIV co-infected patients who had a house with at least two rooms were less likely(AOR,0.5;95%CI:0.3–1.0)to present late than those having only single room.Tobacco non-users of Tb/HIV co-infected participants were also 50%less likely(AOR,0.5;95%CI:0.3–0.8)to present late for HIV care compared to tobacco users.The relative odds of DP among Tb/HIV co-infected patients with ambulatory(AOR,1.8;95%CI,1.0–3.1)and bedridden(AOR,8.3;95%CI,2.8–25.1)functional status was higher than with working status.Conclusions:Three out of five Tb/HIV co-infected patients presented late for HIV care.Higher proportions of DP were observed in bedridden patients,tobacco smokers,and those who had a single room residence.These findings have intervention implications and call for effective management strategies for Tb/HIV co-infection including early HIV diagnosis and early linkage to HIV care services.Hailay Gesesew Birtukan Tsehaineh Desalegn Massa Amanuel Tesfay Hafte Kahsay Lillian Mwanri 2016Infectious Diseases of Poverty2016,5,1:1
19A Longitudinal Study of Team Conflict, Conflict Management, Cohesion, and Team Effectiveness 显示文摘Tekleab Amanuel G Narda R Quigley Paul E Tesluk 2009Group Organization Management2009,34,2:1
20Sediment dynamics and the role of flash floods in sediment export from medium-sized catchments: a case study from the semi-arid tropical highlands in northern Ethiopia显示文摘Matthias Vanmaercke Amanuel Zenebe Jean Poesen Jan Nyssen Gert Verstraeten Jozef Deckers 2010Journal of Soils and Sediments2010,,4:1
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