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| 1 | Carbon stock potential of scattered trees on farmland along an altitudinal gradient in Tigray,Northern Ethiopia显示文摘Introduction:Trees on agricultural landscape play a vital role in ecosystem services including food security that supports human livelihood.They can further offer synergy between adaptation and mitigation in addressing climate change impact.Understanding aboveground tree biomass and soil organic carbon stocks along the altitudinal gradient provide opportunities for better management of the carbon pools.However,little is known on how altitudinal gradient influences on carbon stock of woody biomass and soil of scattered trees on farmland,particularly in a dry area.Methods:The study area were stratified in to five class(500–1000,1000–1500,1500–2000,2000–2500,and 2500–3000 m a.s.l).Quadrats(100 m×50 m)were randomly selected from each of stratified altitudinal gradients.At every sampling point,one composite soil sample was taken at 60 cm soil depth for soil organic carbon analysis.For the purpose of woody biomass estimation,allometric equations developed for a similar area were used.Finally,aboveground biomass carbon(AGC),belowground biomass carbon(BGC),soil organic carbon(SOC),and total carbon stock(TC)status were estimated and variables were compared using one-way analysis of variance(ANOVA).Results:The result indicated that AGC,BGC,SOC,and TC varied significantly(p<0.05)along with an altitudinal gradient.The upper altitude(2500–3000 m a.s.l)AGC,BGC,SOC,and TC stock was estimated as 17.97 Mg C ha^(−1),6.53 Mg C ha^(−1),23.09 Mg C ha^(−1),47.59 Mg C ha^(−1) respectively,and significantly higher than the other altitudinal gradient.Conclusions:We conclude that scattered trees on farmland hold a high potential of carbon storage which may greatly contribute to the climate resilience green economy strategy and their conservation should be promoted. | Yikunoamlak Gebrewahid Tewolde-Berhan Gebre-Egziabhier Kassa Teka Emiru Birhane | 2018 | Ecological Processes2018，7，1： | 2 |
| 2 | Dispersed trees on smallholder farms enhance soil fertility in semi-arid Ethiopia显示文摘Introduction:Dispersed trees such as Oxytenanthera abyssinica(A.Rich.)and Dalbergia melanoxylon(Guill.&Perr.)which are objectively maintained or planted on farmland provide a significant contribution to soil fertility improvement.However,there was no quantitative information on the level of soil nutrient additions of these trees to the soil system.Methods:This study was conducted on the farmers’fields in Kafta Humera district,Tigray region(northern Ethiopia),where mature stands of O.abyssinica and D.melanoxylon trees exist.Radial distance-based soil sampling(under the canopy,near to canopy,and far from canopy)was adopted to quantify the role of these trees on soil fertility improvement.Soil parameters tested were soil reaction(pH),total nitrogen(TN),available phosphorus(AvP),electrical conductivity(EC),cation exchange capacity(CEC),and organic carbon(OC).Results:There was a negative linear relationship between the radial distance of the O.abyssinica tree trunk and soil TN,OC,CEC,and AvP contents but not for pH.Similarly,negative linear relationship between distance from D.melanoxylon and TN,OC,and AvP was obtained.The average total nitrogen(0.26%and 0.13%),available phosphorus(7.21 ppm and 6.37 ppm),and organic carbon(1.73%and 1.02%)contents were respectively higher under the tree canopies of O.abyssinica and D.melanoxylon compared with the adjacent open canopies.The amount of soil OC,TN,AvP,and CEC under O.abyssinica tree species was also significantly higher by 69%,100%,13%,and 42%compared to that of D.melanoxylon tree species.However,the amount of EC and soil pH was significantly lower by 57%and 19%,respectively.Conclusion:In general,O.abyssinica and D.melanoxylon added a significant amount of nutrients to the soil.Thus,retaining these important tree species on farmland played a positive role in replenishing soil fertility for resource-constrained households so as to reduce chemical fertilizer amendments. | Yikunoamlak Gebrewahid Kassa Teka Tewolde-Berhan Gebre-Egziabhier Sara Tewolde-Berhan Emiru Birhane Gebru Eyasu Esayas Meresa | 2019 | Ecological Processes2019，8，1： | 1 |
| 3 | Insecticidal Activity of Some Traditionally Used Ethiopian Medicinal Plants against Sheep Ked Melophagus ovinus显示文摘 | Negero Gemeda Walelegn Mokonnen Hirut Lemma Ashenif Tadele Kelbessa Urga Getachew Addis Asfaw Debella Mesaye Getachew Frehiwot Teka Kidist Yirsaw Kissi Mudie Solomon Gebre Wej Choochote | 2014 | Journal of Parasitology Research2014，，： | 1 |
| 4 | AIDS related knowledge and behaviors among college students Gondar, Ethiopia: a comparative study 显示文摘 | Teka T | 1997 | Ethiop Med J1997，35，3： | 1 |
| 5 | Rpl10l通过补偿转录失活的Rpl10确保精子发生减数分裂的正常进行显示文摘文章简介课题组通过构建Rpl10l敲除小鼠,发现RPL10L在小鼠睾丸中特异表达且与精子发育相关。 | Long Jiang Tao Li Xingxia Zhang Beibei Zhang Changping Yu Yang Li Suixing Fan Xiaohua Jiang Teka Khan Qiaomei Hao Peng Xu Daita Nadano Mahmoud Huleihel Eitan Lunenfeld P.Jeremy Wang 张远伟 史庆华 | 2018 | 科学新闻2018，0，4： | 1 |
| 6 | Green banana and pectin improve small intestinal permeability and reduce fluid loss in Bangladeshi children with persistent diar- rhea显示文摘 | Rabbani G H Teka T Saha S K | 2004 | Digestive Diseases and Sciences2004，49，3： | 1 |
| 7 | Risk factors for deaths in under-age-five children attending a diarrhoea treatment centre显示文摘 | Teka T Faruque ASG Fuchs GJ | 1996 | Acta Paediatrica1996，85，9： | 1 |
| 8 | Screening of some medicinal plants of Ethiopia for their anti-microbial properties and chemical profiles显示文摘 | Aberra Geyid Dawit Abebe Asfaw Debella Zewdneh Makonnen Frehiwot Aberra Frehiwot Teka Tesfaye Kebede Kelbessa Urga Kidist Yersaw Teklele Biza Bisrat Haile Mariam Mulugeta Guta | 2004 | Journal of Ethnopharmacology2004，，3： | 1 |
| 9 | The deubiquitinating gene Usp29 is dispensable for fertility in male mice显示文摘The balanced actions between ubiquitination and deubiquitination precisely control the levels of various proteins vital for spermatogenesis. Ubiquitin-specific processing proteases(USPs) are the largest family of deubiquitinatingenzymes(DUBs),containing more than 50 members. So far, the functions of only a few USPs in male fertility have been studied, the roles of the majority are yet unknown. The present study aimed to explore the function of Usp29(ubiquitin-specific protease 29) in male fertility. We found that Usp29 showed predominant expression in mouse testis, and its m RNA expression started to increase at 14 days postpartum(dpp), with a peak at 28 and 35 dpp. Using CRISPR/Cas9 technology, we generated Usp29 knockout mice(Usp29^(–/–)). Usp29^(–/–)mice exhibited no overt developmental anomalies. Further examination revealed that Usp29^(–/–)mice had normal fertility and showed no detectable difference in the testis/body weight ratio, testicular and epididymal histology as well as epididymal sperm count from the wild-type littermates. Moreover, Usp29 is not a pseudogene in mice. Taken together, our study first reported that though Usp29 is predominantly expressed in the testis, it is not essential for male fertility in mice. | Zhu Huang Manan Khan Jianze Xu Teka Khan Hui Ma Ranjha Khan Hafiz Muhammad Jafar Hussain Xiaohua Jiang Qinghua Shi | 2019 | Science China(Life Sciences)2019，62，4： | 1 |
| 10 | Green banana and pectin improve small intestinal permeability and reduce fluid loss in Bangladeshi children with persistent diarrhea显示文摘 | Rabbani G H Teka T Saha S K | 2004 | Digestive diseases and sciences2004，49，3： | 1 |
| 11 | 基于标准加入法和多水平的药代动力学综合分析疏血通注射液中不稳定的次黄嘌呤(潜在的质量标志物)显示文摘[目的]作为一种中药注射制剂,舒血通注射液用于治疗缺血性脑卒中。次黄嘌呤是其潜在的质量标志物之一。本研究的目的是通过对次黄嘌呤的定量和药代动力学行为分析为疏血通注射液的质量控制奠定基础。[方法]应用液相色谱-串联质谱(LC-MS/MS)首次建立了基于标准加入法的疏血通注射液中次黄嘌呤的定量方法。另一方面,也成功建立了基于LC-MS/MS的大鼠给药后血浆样品中次黄嘌呤的测定方法。[结果]对于相同批次的疏血通注射液,采用常规的液质联用技术测出的次黄嘌呤的浓度大于LC-MS/MS联合标准加入法测出的次黄嘌呤的浓度。单次静脉注射疏血通注射液的低、中、高剂量比为1:2:4,AUC0-t分别为(848.34±324.53)μg·h/L、(1483.94±497.74)μg·h/L,(3074.84±910.29)μg·h/L,剂量呈良好的线性依赖关系。[结论]标准加入法的引入可校正目标化合物的浓度,进而消除内源性物质的影响。别嘌呤出可抑制次黄嘌呤的转化以保证药代动力学研究中检测的准确性。通过空白血浆前处理获得的“空白生物基质”成功区分了内源性和药源性的次黄嘌呤。静脉注射次黄嘌呤血药浓度与给药剂量呈良好的线性关系。同样,多次给药中剂量组也没有药物蓄积,这与单次给药中剂量组的药代动力学特征是相似的。 | 邢彦超 王晓明 王献瑞 赵西子 郭亚卿 黄宇虹 Tekleab Teka 韩立峰 潘桂湘 | 2023 | Acupuncture and Herbal Medicine2023，3，2： | 0 |
| 12 | Parkland trees on smallholder farms ameliorate soil physical-chemical properties in the semi-arid area of Tigray,Ethiopia显示文摘Proposed agroforestry options should begin with the species that farmers are most familiar with,which would be the native multipurpose trees that have evolved under smallholder farms and socioeconomic conditions.The African birch(Anogeissus leiocarpa(DC.)Guill.&Perr.)and pink jacaranda(Stereospermum kunthianum Cham.)trees are the dominant species in the agroforestry parkland system in the drylands of Tigray,Ethiopia.Smallholder farmers highly value these trees for their multifunctional uses including timber,firewood,charcoal,medicine,etc.These trees also could improve soil fertility.However,the amount of soil physical and chemical properties enhanced by the two species must be determined to maintain the sustainable conservation of the species in the parklands and to scale up to similar agroecological systems.Hence,we selected twelve isolated trees,six from each species that had similar dendrometric characteristics and were growing in similar environmental conditions.We divided the canopy cover of each tree into three radial distances:mid-canopy,canopy edge,and canopy gap(control).At each distance,we took soil samples from three different depths.We collected 216 soil samples(half disturbed and the other half undisturbed)from each canopy position and soil depth.Bulk density(BD),soil moisture content(SMC),soil organic carbon(SOC),total nitrogen(TN),available phosphorus(AP),available potassium(AK),p H,electrical conductivity(EC),and cation exchange capacity(CEC)were analysed.Results revealed that soil physical and chemical properties significantly improved except for soil texture and EC under both species,CEC under A.leiocarpus,and soil p H under S.kunthianum,all the studied soils were improved under both species canopy as compared with canopy gap.SMC,TN,AP,and AK under canopy of these trees were respectively 24.1%,11.1%,55.0%,and 9.3% higher than those soils under control.The two parkland agroforestry species significantly enhanced soil fertility near the canopy of topsoil through improving soil physical and chemical properties.These two species were recommended in the drylands with similar agro-ecological systems. | Selam LJALEM Emiru BIRHANE Kassa TEKA Daniel H BERHE | 2024 | Journal of Arid Land2024，16，1： | 0 |
| 13 | Heat Transfer Validation and Comparative Evaluation of Biochar Yield from Pyrolysis Cook Stove显示文摘 | Teka Tesfaye Mengesha Ancha Venkata Ramayya | 2015 | Journal of Agricultural Science and Technology(B)2015，5，6： | 0 |
| 14 | An account of intra-industry trade, 1993-2009: Patterns and determinants in Albanian case显示文摘 | Soana Jaupllari Teka | 2010 | Journal of US-China Public Administration2010，7，12： | 0 |
| 15 | Final results of the first phase of the PROTO-SPHERA experiment: obtainment of the full current stable screw pinch and first evidences of the jet + torus combined plasma configuration显示文摘In astrophysics, the boundary conditions for plasma phenomena are provided by nature and the astronomer faces the problem of understanding them from a variety of observations [Hester J J et al 1996 Astrophys. J. 456 225], on the other hand, in laboratory plasma experiments the electromagnetic boundary conditions become a major problem in the set-up of the machine that produces the plasma, an issue that has to be investigated step by step and to be modified and adapted with great patience, in particular in the case of an innovative plasma confinement experiment. The PROTO-SPHERA machine [Alladio F et al 2006 Nucl. Fusion 46 S613] is a magnetic confinement experiment, that emulates in the laboratory the jet + torus plasma configurations often observed in astrophysics: an inner magnetized jet of plasma centered on the(approximate) axis of symmetry and surrounded by a magnetized plasma torus orthogonal to this jet. The PROTO-SPHERA plasma is simply connected, i.e., no metal current conducting rod is linked to the plasma torus, while instead it is the inner magnetized plasma jet(in the following always called the plasma centerpost) that is linked to the torus. It is mandatory that no spurious plasma current path modifies the optimal shape of the plasma centerpost. Moreover, as the plasma torus is produced and sustained, in absence of any applied inductive electric field, by the inner plasma centerpost through magnetic reconnections [Taylor J B and Turner M F 1989 Nucl.Fusion 29 219], it is required as well that spurious current paths do not surround the torus on its outboard, in order not to lower the efficiency of the magnetic reconnections that maintain the plasma torus at the expense of the plasma centerpost. Boundary conditions have been corrected,up to the point that the first sustainment in steady state has been achieved for the combined plasma. | Paolo MICOZZI Franco ALLADIO Alessandro MANCUSO Vincenzo ZANZA Gerarda APRUZZESE Francesca BOMBARDA Luca BONCAGNI Paolo BURATTI Francesco FILIPPI Giuseppe GALATOLA TEKA Francesco GIAMMANCO Edmondo GIOVANNOZZI Andrea GROSSO Matteo IAFRATI Alessandro LAMPASI Violeta LAZIC Simone MAGAGNINO Simone MANNORI Paolo MARSILI Valerio PIERGOTTI Giuliano ROCCHI Alessandro SIBIO Benedetto TILIA Onofrio TUDISCO | 2024 | Plasma Science and Technology2024，26，2： | 0 |
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