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Electron Swarm Parameters and Dielectric Properties of the Superconducting Binary Mixtures of He-H2 He-H2超导二元混合物的电子群参数和介电性能
Pub Date : 2021-06-22 DOI: 10.47059/alinteri/v36i1/ajas21063
Mohammad M. Othman, S. A. Taha, S. O. Ibrahim
In this study, the electron energy distribution function EEDF, the electron swarm parameters, the effective ionization coefficients, and the critical field strength (dielectric strength) in binary He-H2 gas mixture which used as cryogenic for high-temperature superconducting power application, are evaluated by using two-term approximation of the Boltzmann equation over the range of E/N ( the electric field to gas density) from 1 to 100 Td ( 1 Td=10-17 Vcm2) at temperature 77 K and pressure 2MPa, taking into account elastic and inelastic cross-section. Using the calculated EEDF, the electron swarm parameters (electron drift velocity, mean electron energy, diffusion coefficient, electron mobility, ionization and attachment coefficient) are calculated. At low reduced electric field E/N, the EEDF close Maxwellian distribution, at high E/N, due to vibrational excitation of H2 the calculated distribution function is non-Maxwellian. Besides, in the He-H2 mixture, it is found that increasing small amount of H2 enhances to shift the tail of EEDF to the lower energy region, the reduced ionization coefficient α/N. reduced effective ionization coefficient (α-η)/N) decreases, while, reduced attachment coefficient η/N, reduced critical electric field strength (E/N)crt. and critical electric field Ecrt. Increases, because of hydrogen’s large ionization cross-sections. The dielectric strength of 5% H2 in mixture is in good agreement with experimental values, it is found that dielectric strength depend on pressure and temperature. The electron swarm parameters in pure gaseous helium (He) and hydrogen (H2), in satisfying agreement with previous available theoretical and experimental values. The validity of the calculated values has been confirmed by two-term approximation of the Boltzmann equation analysis.
本文研究了低温高温超导电源应用中氢-氢二元气体混合物的电子能量分布函数EEDF、电子群参数、有效电离系数和临界场强(介电强度)。在温度为77 K,压力为2MPa的条件下,考虑弹性和非弹性截面,采用玻尔兹曼方程的两项近似,在E/N(电场与气体密度之比)范围内从1到100 Td (1 Td=10-17 Vcm2)进行了评估。利用计算得到的EEDF,计算出电子群参数(电子漂移速度、平均电子能、扩散系数、电子迁移率、电离和附着系数)。在低约化电场E/N时,EEDF接近麦克斯韦分布,在高约化电场E/N时,由于H2的振动激发,计算得到的分布函数是非麦克斯韦分布。此外,在He-H2混合物中,增加少量的H2有助于edf尾部向低能区移动,降低了电离系数α/N。还原有效电离系数(α-η)/N减小,而还原附着系数η/N减小,临界电场强度(E/N)减小。临界电场Ecrt。增加,因为氢的电离截面很大。5% H2混合物的介电强度与实验值吻合较好,介电强度与压力和温度有关。纯气态氦(He)和氢(H2)的电子群参数与已有的理论和实验值吻合得很好。通过对玻尔兹曼方程的两项近似分析,证实了计算值的有效性。
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引用次数: 1
Automated Rescuing Boat Tracking System Using Raspberry Pi 自动救援船跟踪系统使用树莓派
Pub Date : 2021-06-22 DOI: 10.47059/alinteri/v36i1/ajas21068
Adlan Nafiz Norzeli, Za’iem Sabielar Rasyad, M. Razif, D. Misman, I. N. A. M. Nordin, Hikma Shabani
During floods, safety boats will be dispatched to help flood victims. The location tracking system is important to ensure the safety of the victim. Therefore, this project is conducted to track live locations and monitor flood survivors wirelessly. In tracking the victim’s location, a small and compact computer, called a Raspberry Piis installed on the boat and the recorded data has been uploaded online. This will help firefighters to monitor the location of the boat easily and help the victims navigate the boat to a safe place. A safety camera is installed to help firefighters monitor the situation as well. For system validation, various tests are conducted on-road, swimming pool and Panchor river in Muar, Johor, Malaysia. Hence, the performance on road is accurate. In fact, the recorded speed reading is similar to the speed measured by Google Maps. At the Pagoh Higher Education Hub (HPTP), Johor, Malaysia swimming pool, it is observed that, the faster the boat speed, the shorter the time required to complete a 50 meters trip. Finally, the river testing has shown that the boat speed increases when the boat moves in the same direction as the water current and slows down if the boat and river currents move in opposite directions.
在洪水期间,将派遣安全船帮助灾民。位置跟踪系统对于确保受害者的安全至关重要。因此,该项目进行跟踪现场和监测洪水幸存者的无线。为了追踪受害者的位置,船上安装了一台名为Raspberry Piis的小型紧凑型电脑,记录的数据已上传到网上。这将有助于消防员轻松监控船只的位置,并帮助受害者将船只导航到安全的地方。还安装了一个安全摄像头,以帮助消防员监控现场情况。为了验证系统,在马来西亚柔佛州Muar的道路、游泳池和Panchor河上进行了各种测试。因此,在道路上的表现是准确的。事实上,记录的速度阅读与谷歌地图测量的速度相似。在马来西亚柔佛的Pagoh高等教育中心(HPTP)游泳池,人们观察到,船速越快,完成50米行程所需的时间就越短。最后,河流测试表明,当船与水流方向相同时,船速会增加,如果船与水流方向相反,船速会减慢。
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引用次数: 0
Spatial-Temporal Analysis of Air Pollutant Concentrations in Relation to Land Use and School Environment 大气污染物浓度与土地利用和学校环境的时空关系分析
Pub Date : 2021-06-22 DOI: 10.47059/alinteri/v36i1/ajas21080
Healice Julit, N. Khalid, Abdul Rauf Abdul Rasam, M. H. Razali, Maisarah Abdul Halim
Excessive exposure schoolchildren to air pollution can lead to long-lasting health problems, allergies and respiratory disease. It is well known that the major factors contributing to increase of air pollution are motor vehicles and industries. Thus, it is important to analyze the spatial temporal air pollutant concentrations and its relation with school location as the location of schools and its surrounding can increase their exposure. In this study, six schools in Johor were selected and the land use surrounding the schools were updated using ArcGIS. The Inverse Distance Weighting (IDW) interpolation technique was used to identify which schools’ area in Johor has a higher range of air pollutant concentration. There are four air pollution parameters obtained from the Department of Environment (DOE) which are PM2.5, CO, O3 and SO2. Hourly air pollutant concentration reading was obtained from the DOE in order to analyze air pollutant concentration during school period. The results obtained from the IDW technique showed that Sekolah Menengah Pasir Gudang (2) located in Pasir Gudang, Malaysia has reached a very unhealthy and hazardous level as compared to other schools in Johor. On the other hand, Sekolah Menengah Kebangsaan Tanjung Pengelih, Pengerang, Malaysia showed good to unhealthy range as compared to other schools in Johor. The spatial autocorrelation tool was used to analyze the relationship between the air pollution concentration and the school’s location in Johor. The results showed that the Moran’s Indices is positive showing a strong relationship that is clustering. It can be stated that there is a relationship between air pollutant concentrations with the school locations.
学童过度接触空气污染可导致长期健康问题、过敏和呼吸道疾病。众所周知,导致空气污染增加的主要因素是机动车和工业。因此,分析空气污染物的时空浓度及其与学校位置的关系具有重要意义,因为学校及其周围的位置会增加它们的暴露。本研究选取柔佛州的六所学校,使用ArcGIS更新学校周围的土地利用情况。利用逆距离加权(IDW)插值技术确定柔佛州哪些学校所在区域的空气污染物浓度范围较高。有四个空气污染参数从环境部(DOE)获得PM2.5, CO, O3和SO2。每小时的空气污染物浓度读数从美国能源部获得,以分析在校期间的空气污染物浓度。IDW技术的结果显示,位于马来西亚Pasir Gudang的Sekolah Menengah(2)与柔佛州的其他学校相比,达到了非常不健康和危险的水平。另一方面,马来西亚Pengerang的Sekolah Menengah Kebangsaan Tanjung Pengelih与柔佛州其他学校相比,表现出良好到不健康的范围。利用空间自相关工具分析柔佛州空气污染浓度与学校位置的关系。结果表明,莫兰指数为正,表现出较强的聚类关系。可以说,空气污染物浓度与学校地点之间存在一定的关系。
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引用次数: 0
Strecker Synthesis of α-aminonitriles Facilitated by N-methyl Imidazolium Acetate n -甲基咪唑醋酸酯催化合成α-氨基腈
Pub Date : 2021-06-22 DOI: 10.47059/alinteri/v36i1/ajas21048
E. Madadi
N-Methyl imidazolium acetate [HMIm]OAc was simply prepared through reaction of N-methyl imidazole with acetic acid and it was applied as a media and promoter for Strecker synthesis of α-aminonitriles. The three component reaction of a variety of structurally different aldehydes and amines with trimethylsilyl cyanide (TMSCN) in the presence of [HMIm]OAc were evaluated. Reaction of aromatic aldehydes and cinnamaldehyde with either aromatic and aliphatic amines provided the corresponding α-aminonitriles in high to excellent isolated yields after short period of time at room temperature.
以n -甲基咪唑与乙酸为原料,制备了n -甲基咪唑醋酸酯[HMIm]OAc,并将其作为Strecker合成α-氨基腈的介质和促进剂。研究了在[HMIm]OAc存在下,多种结构不同的醛和胺与三甲基硅氰(TMSCN)的三组分反应。芳香族醛和肉桂醛与芳香族胺和脂肪族胺反应,在室温条件下短时间分离得到高收率的α-氨基腈。
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引用次数: 0
Design and Fabrication of Standing Wheel Chair 站立式轮椅的设计与制造
Pub Date : 2021-06-22 DOI: 10.47059/alinteri/v36i1/ajas21074
K. Karthiga, Dr.R. Balamurugan, S. Poovarasan, S. Sabarish, S. Suryaprakash
The wheelchair clients are presented to numerous physical and mental medical issues related with delayed situated stance with being inert in wheelchair, e.g., weariness, torment in hip joint, pressure injuries, and so forth Other related issues are expansion in guardian reliance, lower back torments among parental figures, and injury rates during move support, and so forth Numerous old subjects who can walk are confined in wheelchairs because of the absence of standing capacity. With less parental figures and expanded quantities of lower appendage handicapped and older subjects, there is a significant need of improved wheelchair plans focused on upgraded autonomy of wheelchair clients. The focal point of present work was at planning a novel reconfigurable wheelchair joined with stand and sit abilities with the end goal of improvement of freedom and personal satisfaction of lower appendage incapacitated and old subjects. Further work presents a general item plan and improvement periods of a reconfigurable wheelchair. The significant commitments of paper can be summed up as Modeling and creation of a proposed wheelchair and testing it in an ongoing requirement with load application. The proposed creative answer for the issues of long haul wheelchair clients has a promising potential to upgrade autonomy and personal satisfaction of crippled individuals.
坐轮椅的病人会遇到许多身体和精神上的医疗问题,这些问题与轮椅上的姿势延迟和惰性有关,如疲劳、髋关节疼痛、压力损伤等。其他相关问题还包括监护人依赖的扩大、父母的下背部疼痛、移动支持时的受伤率等。许多可以行走的老年人由于缺乏站立能力而被限制在轮椅上。随着父母数量的减少和下肢残疾和老年受试者数量的增加,迫切需要改进轮椅计划,重点是提高轮椅客户的自主性。本研究的重点是设计一种具有站立和坐下功能的新型可重构轮椅,以提高下肢残疾和老年受试者的自由度和个人满意度。进一步提出了可重构轮椅的总体项目计划和改进周期。论文的重要承诺可以总结为建模和创建建议的轮椅,并在负载应用的持续需求中进行测试。针对长途轮椅客户的问题提出的创造性解决方案有希望提升残疾人的自主性和个人满意度。
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引用次数: 0
Coastal Depth Extraction from Satellites Images 基于卫星图像的海岸深度提取
Pub Date : 2021-06-22 DOI: 10.47059/alinteri/v36i1/ajas21070
Nurhanisah Hashim, K. N. Tahar, W. Windupranata, SAIFUL AMAN Bin HJ SULAIMAN
The problems in bathymetry measurement often have gaps or ‘holes’ within the data. As a result, hydrographic surveyors often have sparse data, and even though the data is dense and equal distances, there is still a gap in time. This paper present coastal depth extraction from satellite images. The problem encountered during the bathymetry derivation process and the problem related to the space, distribution and quantity of the Single-beam echo sounder (SBES) data. Therefore, the idea of using spatial interpolation could be a suitable approach in solving the problems. This study intends to produce Satellite-Derived Bathymetry (SDB) from Landsat 8 images at Pantai Tok Jembal, Terengganu, Malaysia. The proposed method by first interpolating the SBES point in the calibration data using spatial predictors, i.e. Inverse Distance Weightage, Thin-Plate Spline, Spline with Tension, Universal Kriging, Natural Neighbor, and Topo to Raster. Second, the raster output created from the interpolation process then converts into the point shapefile. Third, intersect function use to eliminate the point whereby not in the domain. Finally, the newly generated SBES points in calibration data ready to apply at the SDB computation process, generating SDB. In continuation, a comparative analysis conducted between six SDB results generated using each different newly generated calibration data. The result indicates SDB utilizes with Universal Kriging-newly generated calibration data (RMSE: 0.718 m) was the best result. To summarise, this study has successfully attained the research objectives by utilizing the newly generated calibration data in generating SDB. The task of spatial interpolation recreates the SBES data from irregular space and short data to uniform space and long data, which facilitate in pixel to point value extraction and help refine the bathymetry derivation process. Furthermore, the proposed method suitable to be used when the data are not applicable or limited.
测深测量中的问题通常是在数据中存在空白或“漏洞”。因此,水文测量员往往拥有稀疏的数据,即使数据密集且距离相等,但在时间上仍然存在差距。本文提出了一种基于卫星图像的海岸深度提取方法。在水深推导过程中遇到的问题,以及与单波束测深数据的空间、分布和数量有关的问题。因此,利用空间插值的思想可能是解决这些问题的一种合适的方法。本研究拟从马来西亚登嘉楼Pantai Tok Jembal的Landsat 8图像中产生卫星衍生水深测量(SDB)。该方法首先利用逆距离权重、薄板样条、张力样条、通用克里格、自然邻域、拓扑到栅格等空间预测因子对标定数据中的SBES点进行插值。其次,从插值过程中创建的栅格输出然后转换为点形状文件。第三,使用相交函数消除不在域内的点。最后,将新生成的SBES点在校准数据中准备应用于SDB计算过程,生成SDB。接着,对使用不同新生成的校准数据生成的6个SDB结果进行了对比分析。结果表明,采用Universal kriging -new - generated校准数据的SDB (RMSE: 0.718 m)效果最好。综上所述,本研究利用新生成的校准数据生成SDB,成功达到了研究目的。空间插值任务将SBES数据从不规则空间和短数据重构为均匀空间和长数据,方便了像点值的提取,有助于精细化水深求导过程。此外,所提出的方法适用于数据不适用或有限的情况。
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引用次数: 0
Reconstruction of Low-value Plantings as an Element of Sustainable Forest Management in the South of the Russian Far East 在俄罗斯远东南部重建低价值种植作为可持续森林管理的一个要素
Pub Date : 2021-06-22 DOI: 10.47059/alinteri/v36i1/ajas21058
A. Komin, V. N. Usov
The article presents the research results of low-value oak plantations in which, in the first half of the 90s of the XX century, measures were taken to reconstruct these objects by forest plantation development created by planting Korean cedar seedlings in previously prepared corridors in the south of Primorsky Krai. The paper analyzed the variability of the main taxation characteristics of the created stands according to the following indicators: average height, average diameter, volume of growing stock as of 2021. The capacity for survival of plants in stands, diameter distribution were studied. According to the research results, it was found that the work performed on the reconstruction of oak forests of mixed origin, despite the admitted deviations from the reconstruction project, has led to positive results. To achieve the best results, it is necessary to adjust the rate of planting seedlings per hectare of the area. The optimal planting rate is 1-1.5 thousand of pcs/ha. It is advisable to increase the distance between plants in the planting row up to 1.5 -2.5 m. After reconstruction works, it is necessary to provide for forest tending in the plantations aimed at creating optimal conditions for the formation of valuable cedar-broad-leaved plantations. It is concluded that it is advisable to carry out the work on reconstruction of low-value plantations of coppice and mixed origin in the southern regions of the Russian Far East in order to achieve the goals of sustainable forest management of the region's forests, including the preservation of their biodiversity.
本文介绍了低价值橡树种植园的研究成果,在20世纪90年代上半叶,在滨海边疆区南部预先准备的走廊上种植红杉树苗,从而采取措施重建这些对象。本文根据截至2021年的平均高度、平均直径、生长量等指标,分析了新建林分主要税收特征的可变性。研究了林分植物的生存能力、直径分布。根据研究结果发现,尽管承认与重建项目存在偏差,但混合起源栎林重建工作取得了积极成果。为了达到最佳效果,需要调整每公顷面积的种苗率。最佳种植量为1-1.5万株/公顷。宜将种植行内植株之间的距离增加至1.5 -2.5米。改造工程完成后,有必要对人工林进行抚育,为杉木阔叶林的形成创造最佳条件。结论是,为了实现该地区森林的可持续森林管理目标,包括保护其生物多样性,在俄罗斯远东南部地区开展低价值灌木林和混合原产地人工林的重建工作是明智的。
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引用次数: 0
Effects of Various Nutrient Sources on Growth and Essential Oil Characteristics of Salvia Officinalis L. in Greenhouse 不同营养源对温室鼠尾草生长及精油特性的影响
Pub Date : 2021-06-22 DOI: 10.47059/alinteri/v36i1/ajas21047
A. Soltanbeigi, M. Yıldız, Erhan Sakartepe
The agronomic and chemical characteristics of aromatic plants are affected by nutritional sources. Salvia officinalis (common sage) is an aromatic plant extensively used in food, popular medicine, and many pharmacological research studies. In this study, the effects of NPK, vermicompost and two types of microbiological fertilizer were investigated on the agronomic parameters and volatile oil characteristics of S. officinalis grown in the greenhouse. The plants were harvested two times (1st and 2nd cuttings) during the growing season. The consumption of NPK has the highest effect on stem number (54 no plant-1), fresh and dry herb weight (96.8 and 27.2 g p-1), fresh and dry leaf weight (74.6 and 19.6 g p-1), and volatile oil percentage (1.64%). While the herb weight at the 1st cutting (74.3 g p-1) was higher than the 2nd cutting (70.2 g p-1), the fresh (58.2 g p-1) and dry (16.6 g p-1) leaf weights and the leaf ratio (80.5 %) at the 2nd cutting were higher than the 1st cutting. Moreover, the volatile oil contents at the 1st cutting (1.44%) were higher than the 2nd cutting (1.18%). In total, 31 compounds were identified in the volatile oils by using GC/FID-MS. The percentages of α-Thujone (22.4-31.4%) and Camphor (21.0-25.4%) were found higher than other compounds. The content of α-Thujone was higher in NPK and vermicompost treatments. Based on the results, the application of different nutritional sources improved the yield and chemical properties of S. officinalis. Among the non-chemical nutrient sources, vermicompost had high efficiency.
芳香植物的农艺和化学特性受营养源的影响。鼠尾草(Salvia officinalis)是一种芳香植物,广泛用于食品、流行药物和许多药理研究。本试验研究了氮磷钾、蚯蚓堆肥和两种微生物肥对大棚栽培的麻草农艺参数和挥发油特性的影响。植株在生长季节收获两次(第一次和第二次插枝)。氮磷钾用量对茎数(54株)、鲜干重(96.8 g p-1和27.2 g p-1)、鲜干叶重(74.6 g p-1和19.6 g p-1)和挥发油含量(1.64%)影响最大。第一次扦插草本重(74.3 g p-1)高于第二次扦插(70.2 g p-1),第二次扦插鲜叶重(58.2 g p-1)、干叶重(16.6 g p-1)和叶片比(80.5%)均高于第一次扦插。第一次扦插挥发油含量为1.44%,高于第二次扦插挥发油含量1.18%。通过GC/FID-MS共鉴定出31个化合物。α-图琼酮(22.4 ~ 31.4%)和樟脑(21.0 ~ 25.4%)的含量高于其他化合物。氮磷钾处理和蚯蚓堆肥处理的α-图琼酮含量较高。结果表明,不同营养源的施用可提高马蹄草的产量和化学性质。在非化学营养源中,蚯蚓堆肥的效率较高。
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引用次数: 0
Research of Reclamation Properties of Agricultural Glaukonite Ores on Salted Soils 农业用海绿石矿盐渍土复垦特性研究
Pub Date : 2021-06-22 DOI: 10.47059/alinteri/v36i1/ajas21084
N. Takhirova, F.I. Khudoyberdiyev, S. Bauatdinov, T. Bauatdinov, M. Muratova
The article presents the results of studies of the agro-ore of glauconite of Karakalpakstan, its reclamation properties when used on saline soils of the Aral Sea region. The results of the studies showed that the annual application of enriched glauconite leads to a decrease in chloride and sulfate salts in the soil, and the content of harmless salts increases.
本文介绍了卡拉卡尔巴斯坦海绿石农用矿石在咸海盐碱地上的复垦性能。研究结果表明,每年施用富集海绿石导致土壤中氯化物和硫酸盐盐含量减少,无害盐含量增加。
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引用次数: 0
Farmers’ Perception on Development Induced Farmland Expropriation in Ethiopia: A Review 埃塞俄比亚农民对发展引发的农地征用的认知:一个回顾
Pub Date : 2021-06-22 DOI: 10.47059/alinteri/v36i1/ajas21066
Emam Adem Endris, J. Mansingh, A. Nisha, P. Anbarasan, R. Makarla
Expropriation of farmland is one of the major options for many countries to meet the demands of emerging developments taking place in the urban-rural interface. This is commonly practiced without the consent of the farmers on a non-discriminatory basis in compliance with the law by compensation. In Ethiopia, the status of displaced farmers by expropriation of farmlands due to the expansion of towns and development projects, their perception on expropriation and compensation laws, participation in the valuation process and compensations are not clear and needs to be articulated. From this review, it is clear that none of the expropriate felt proud of the government's plan of farmland expropriation; but they supported the establishment of development-induced projects; and that they don't know about the laws and regulations of farmland expropriation and compensation in Ethiopia. Expropriates deeply felt bad that their farmland was expropriated without involving them in decision-making. Ten years annual income won't adequately compensate the loss of all the rights. Hence, open ventilation to understand the priority of the people and reviewing the prevailing expropriation and compensation laws will enable the government and to make a smooth environment for the project's undertaking. Farmers should have equal rights for participation within the expropriation process i.e. must be told, consulted, involved, and empowered to form such decisions.
农地征用是许多国家满足城乡结合部新兴发展需求的主要选择之一。这种做法通常是在没有得到农民同意的情况下,在非歧视的基础上按照法律规定进行赔偿。在埃塞俄比亚,由于城镇和发展项目的扩大而征用农田而流离失所的农民的地位、他们对征用和补偿法的看法、参与估价过程和补偿都不清楚,需要加以阐明。由此可见,没有一个被征地者对政府的征地计划感到自豪;但他们支持建立发展项目;他们不了解埃塞俄比亚的土地征用和补偿法律法规。被征地者对自己的农田在没有参与决策的情况下被征用深感痛心。十年的年收入不足以弥补所有权利的损失。因此,开放通风了解人民的优先事项,并审查现行的征收和补偿法,将使政府能够为项目的开展创造一个顺利的环境。农民在征收过程中应该有平等的参与权利,即必须被告知、被征求意见、被参与并被授权做出这样的决定。
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引用次数: 0
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Alinteri Journal of Agriculture Sciences
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