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Effcts of irrigation Patterns and Nitrogen Fertilization on Rice Yield and Microbial Community Structure in Paddy Soil

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Pedosphere 2012年第5期22卷 661-672页

作者： Li Ya-Juan ChEN Xing i.h.shamsi FANG Ping LiN Xian-Yong Ministry of Education Key Laboratory of Environmental Remediation and Ecological health College of Environmental and Resource SciencesZhejiang UniversityHangzhou 310058(China) Zhejiang Provincial Key Laboratory of Subtropical Soil Science and Plant Nutrition College of Environmental and Resource SciencesZhejiang UniversityHangzhou 310058(China)

Water and nitrogen （N） are considered the most important factors affecting rice production and play vital roles in regulating soil microbial biomass, activity, and community. The effects of irrigation patterns and N fertilizer levels on the soil microbial community structure and yield of paddy rice were investigated in a pot experiment. The experiment was designed with four N levels of 0 （NO）, 126 （N1）, 157.5 （N2）, and 210 kg N ha^（-1）（N3） under two irrigation patterns of continuous water-logging irrigation （WLi） and water- controlled irrigation （WCi）. Phospholipid fatty acid （PLFA） analysis was conducted to track the dynamics of soil microbial communities at tillering, grain-filling, and maturity stages. The results showed that the maximums of grain yield, above-ground biomass, and total N uptake were all obtained in the N2 treatment under WCi. Similar variations in total PLFAs, as well as bacterial and fungM PLFAs, were found, with an increase from the tillering to the grain-filling stage and a decrease at the maturity stage except for actinomycetic PLFAs, which decreased continuously from the tillering to the maturity stage. A shift in composition of the microbial community at different stages of the plant growth was indicated by principal component analysis （PCA）, in which the samples at the vegetative stage （tillering stage） were separated from those at the reproductive stage （grain-filling and maturity stages）. Soil microbial biomass, measured as total PLFAs, was significantly higher under WCi than that under WLi mainly at the grain-filling stage, whereas the fungal PLFAs detected under WCi were significantly higher than those under WLi at the tillering, grain-filling, and maturity stages. The application of N fertilizer also significantly increased soil microbial biomass and the main microbial groups both under WLi and WCi conditions. The proper combination of irrigation management and N fertilizer level in this study was the N2 （157.5 kg N ha^（-1）） treatmen

关键词： irrigation management nitrogen levels phospholipid fatty acid rice growth stage soil microorganism

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Short-Term Responses of Nitrogen Mineralization and Microbial Community to Moisture Regimes in Greenhouse Vegetable Soils

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Pedosphere 2012年第2期22卷 263-272页

作者： ChEN Qiu-hui FENG Ying ZhANG Yan-Ping ZhANG Qi-Chun i.h.shamsi ZhANG Yong-Song LiN Xian-Yong Key Laboratory of Environmental Remediation and Ecosystem health of Ministry of Education College of Environmental and Resource SciencesZhejiang UniversityHangzhou 310058(China) Key Laboratory of Subtropical Soil Science and Plant Nutrition of Zhejiang Province College of Environmental and Resource SciencesZhejiang UniversityHangzhou 310058(China)

Soil drying and wetting impose significant influences on soil nitrogen (N) dynamics and microbial communities. however, effects of drying-wetting cycles, while common in vegetable soils, especially under greenhouse conditions, have not been well studied. in this study, two greenhouse vegetable soils, which were collected from Xinji (XJ) and hangzhou (hZ), China, were maintained at 30% and 75% water-holding capacity (WhC), or five cycles of 75% WhC followed by a 7-day dry-down to 30% WhC (DW). Soil inorganic N content increased during incubation. Net N mineralization (Nmin), microbial activity, and microbial biomass were significantly higher in the DW treatment than in the 30% and 75% WhC treatments. The higher water content (75% WhC) treatment had higher Nmin, microbial activity, and microbial biomass than the lower water content treatment (30% WhC). Multivariate analyses of community-level physiological profile (CLPP) and phospholipid fatty acid (PLFA) data indicated that soil moisture regime had a significant effect on soil microbial community substrate utilization pattern and microbial community composition. The significant positive correlation between Nmin and microbial substrate utilization or PLFAs suggested that soil N mineralization had a close relationship with microbial community.

关键词： drying-wetting cycles microbial activity microbial biomass microbial substrate utilization phospholipid fatty acid

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The association between SNPs at BnVTE4 andα-/γ- tocopherol ratio in oilseed rape(Brassica napus)

The association between SNPs at BnVTE4 andα-/γ- tocopherol...

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中国作物学会2013年学术年会

作者： N.hussain i.h.shamsi Lixi Jiang Department of Agronomy Key Laboratory of Crop Germplasm Resource of Zhejiang ProvinceZhejiang University

Rapeseed is the most important oil crop of temperate *** is grown mainly for vegetable oil for human consumption,but also for other purposes such as animal feed and raw industrial *** oil contains tocopherols(Toc),an indispensable nutrient for humans and animals due to its antioxidant and radical scavenging *** comprises of four isomers(α,β,γ,andδ-Toc).in rapeseed oil,γ-Toc is the most predominant isoforms, followed byα-Toc,which exhibits 100%biological activity of vitamin ***,seed oil with increased

关键词： Brassica napus Genotypic variation Tocopherol SNP VTE4 EMS hRM α-/γ-Tocopherol ratio

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巴基斯坦高校创业教育的现状与前景:一项学生视角的案例研究

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创新与创业教育 2015年第2期6卷 104-110页

作者： iffat Batool i.h.shamsi 孙杨李娜浙江大学教育学院浙江杭州310028 南京大学教育研究院江苏南京210093 哈尔滨师范大学教育科学学院黑龙江哈尔滨150025

通过对巴基斯坦伊斯兰堡信息技术学院学生接受创业教育的案例研究,探讨巴基斯坦高等教育机构在提高高校大学生创业教育水平上的做法及其效果。研究发现巴基斯坦高校创业体系不均衡,高校创业课程改革滞后。要提高巴基斯坦高校创业教育水... 详细信息

通过对巴基斯坦伊斯兰堡信息技术学院学生接受创业教育的案例研究,探讨巴基斯坦高等教育机构在提高高校大学生创业教育水平上的做法及其效果。研究发现巴基斯坦高校创业体系不均衡,高校创业课程改革滞后。要提高巴基斯坦高校创业教育水平,需要建立和维持不同组织的创业教育网络,要建立、吸收有质量保证的创业教育,推广硕博研究生创业教育课程和实现创业教师高水平化,要建立合适的政策框架来保证政策能够正确实施,在课程考评方面要对学生在校内开展的创业实践活动进行评估。

关键词：巴基斯坦高校高等教育创业教育创业案例

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Sequence,expression divergence,and complementation of homologous ALCATRAZ loci in Brassica napus

Sequence,expression divergence,and complementation of homolo...

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2012年中国作物学会学术年会

作者： i.h.shamsi,Lixi Jiang and Guoping Zhang Department of Agronomy,Key Laboratory of Crop Germplasm Resource of Zhejiang Province,Zhejiang University,hangzhou 310058,China

The genomic era provides new perspectives in understanding polyploidy evolution,mostly on the genome-wide *** sequence and expression divergence between the homologous ALCATRAZ(ALC)loci in Brassica napus,responsible f... 详细信息

关键词： ALCATRAZ.Arabidopsis.Brassica.homologous loci.Silique dehiscence

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PCL/hA静电纺丝纤维涂层对可降解Mg/hA复合材料的表面改性:力学性能、腐蚀和生物相容性

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Transactions of Nonferrous Metals Society of China 2024年第5期34卷 1470-1486页

作者： M.shamsi M.SEDiGhi A.BAGhERi School of Mechanical Engineering Iran University of Science and TechnologyTehranIran

采用搅拌铸造和挤压法制备Mg/hA复合材料,并在其表面采用静电纺丝法涂覆聚己内酯/羟基磷灰石(PCL/hA)纤维(2.5%和5%hA,质量分数),以提高其耐腐蚀性。力学性能测试结果表明,复合材料的压缩屈服强度从73MPa(纯镁)提高到151MPa,提高了107%... 详细信息

采用搅拌铸造和挤压法制备Mg/hA复合材料,并在其表面采用静电纺丝法涂覆聚己内酯/羟基磷灰石(PCL/hA)纤维(2.5%和5%hA,质量分数),以提高其耐腐蚀性。力学性能测试结果表明,复合材料的压缩屈服强度从73MPa(纯镁)提高到151MPa,提高了107%。SEM、EDS和XRD分析表明,hA颗粒分布在多孔涂层中。极化曲线结果表明,涂层试样的耐腐蚀性能均优于未涂覆试样。PCL涂层使样品的腐蚀电流密度降低了两个数量级。通过极化和体外腐蚀试验证明了hA在涂层中的有效性。涂层和随后形成的Ca-P层阻碍了模拟体液与基体的接触和渗透,从而起到保护表面的作用。PCL/2.5%hA涂层样品的腐蚀速率最低,其平均值为0.98mm/a,与未涂层样品相比,在14天内减少了81%。根据3天MTT结果,使用PCL/2.5%hA涂层可使细胞活性从43%提高到121%。综上,涂覆PCL/2.5%hA纤维的Mg/hA复合材料在生物可吸收植入物方面具有广阔的应用前景。

关键词：镁基复合材料复合涂层生物可降解羟基磷灰石聚己内酯纤维

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Uncovering the epidemiology of bladder cancer in the Arab world: A review of risk factors, molecular mechanisms, and clinical features

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Asian Journal of Urology 2024年第3期11卷 406-422页

作者： Noura F.Abbas Marc R.Aoude hampig R.Kourie humaid OAl-shamsi Department of hematology-Oncology Hotel Dieu De France HospitalSaint Joseph University of BeirutRiad El SolhLebanon Department of Oncology Burjeel Cancer InstituteBurjeel Medical CityAbu DhabiUnited Arab Emirates innovation and Research Center Burjeel Cancer InstituteBurjeel Medical CityAbu DhabiUnited Arab Emirates College of Medicine University of SharjahSharjahUnited Arab Emirates Emirates Oncology Society DubaiUnited Arab Emirates College of Medicine Gulf Medical UniversityAjmanUnited Arab Emirates

Objective:Bladder cancer(BC)is a significant public health concern in the Middle East and North Africa,but the epidemiology and clinicopathology of the disease and contributors to high mortality in this region remain poorly *** aim of this systematic review was to investigate the epidemiological features of BC in the Arab world and compare them to those in Western countries in order to improve the management of this ***:An extensive electronic search of the PubMed/PMC and Cochrane Library databases was conducted to identify all articles published until May 2022,following the Preferred Reporting items for Systematic reviews and Meta-Analyses guidelines.A total of 95 articles were included in the final analysis after title,abstract,and full-text screening,with additional data obtained from the GLOBOCAN and WhO 2020 databases.

关键词： Bladder cancer Epidemiology Risk factor Biomarker Schistosomiasis Arab world Urology

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Purification of Produced Water from a Sour Oilfield in South Kuwait. 1. Oil-Water Separation and industrial Salt Production

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Journal of Water Resource and Protection 2024年第2期16卷 156-180页

作者： Feras Al Salem hessa Al shamsi Mariam Mohammed Abdulla Alaryani Basmalah Abdelazim Mohamed Khalaf Omnia Elsheikh Vijo Poulose Yosef Al Jasem Thies Thiemann Department of Biology United Arab Emirates University Al Ain United Arab Emirates Department of Chemistry United Arab Emirates University Al Ain United Arab Emirates Department of Process & Design Engineering Solid Mechanical Equipment Co Abu Dhabi United Arab Emirates

Produced water from an oil extraction site in South Kuwait was sampled after primary oil – water separation had been carried out. The produced water was filtered through a mixture of activated charcoal and esterified cellulosic material gained from spent coffee grounds as a tertiary adsorption treatment. The earth-alkaline metal ions and heavy metals were separated from the de-oiled produced water by addition of either sodium or potassium hydroxide in the presence of carbon dioxide or by direct addition of solid sodium carbonate. The resulting filtrate gave salt of industrial purity upon selective crystallization on evaporation.

关键词： Produced Water Oil and Gas Adsorption Filtration Crystallization

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Micromorphology and Quality Attributes of the Loess Derived Soils Affected by Land Use Change:A Case Study in Ghapan Watershed,Northern iran

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Journal of Mountain Science 2009年第2期6卷 197-204页

作者： Farhad Khormali Somaye shamsi Dept. of Soil Science College of Agriculture Gorgan University of Agricultural Sciences and Natural ResourcesGorganIran

in order to study the effects of different land vegetative covers on soil quality attributes, a loess hill slope was selected in eastern Golestan Province, Ghapan watershed, iran. Four profiles in four land uses, including Quercus natural forest; Pinus artificial forest; Cupressus artificial forest and a cultivated land, were studied. Results showed that MWD was significantly different in the studied land uses, and it varied between 1.6 mm in Quercus natural forest and o.31 mm in cultivated land use. The lowest CEC, microbial respiration rate and organic carbon were 28.4 cmol·kg^1, 177 μgCO2·g^-1·day^-1 and 1.32 % found in cultivated land use, respectively. The organic matter was considerably higher content in the forest areas than that of cultivated land use. The studies on soil profile development revealed that the natural forest soils were highly developed. The soils of the Quercus natural forest were classified as Calcic haploxeralfs with a well developed argillie horizon unlike the cultivated soils which showed the minimum development and classified as Typic Xerorthents. The soils of the artificial forests had both mollic epipedons and were classified as Typic Calcixerolls with moderate profile development. Micromorphological studies revealed that argillic horizons had speckled and partly crystallitic b-fabric in the natural forest indicating the high landscape stability. in contrast, the crystallitic b-fabric of other land uses shows the absence of enough leaching of carbonate and the subsequent migration of clay particles indicating the unstable conditions and high soil erosion. intense erosion of the surface horizons of cultivated land use has resulted in the outcropping of the subsurface carbonate rich horizons preventing soil development.

关键词： Soil micromorphology soil quality loess iran

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EMC improvement for high Voltage Pulse Transformers by Pareto-optimal Design of a Geometry Structure Based on Parasitic Analysis and EMi Propagation

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CSEE Journal of Power and Energy Systems 2021年第5期7卷 1051-1063页

作者： Mohamad Saleh Sanjari Nia Pourya shamsi Mehdi Ferdowsi Missouri University of Science and Technology USA.

high voltage pulse transformers have an essential role in pulsed power systems and power conversion *** the electromagnetic behavior of such devices leads to better efficiency and low-level electromagnetic interference(EMi)noise propagation in *** this paper,a high voltage pulsed power system is considered and analyzed to improve their electromagnetic compatibility(EMC).The new generation of pulsed power systems that use SiC and GaN fast switches in capacitor charger power electronic circuits,face far more EMi ***,in this paper,the EMi propagation paths in the pulsed power system are realized and *** EMi noise level of the system is obtained and compared to the iEC61800-3 *** improve the EMC,the parasitic parameters of the transformer,as the main path of EMi circulation,are optimized to block the EMi propagation in the pulsed power *** achieve this result,the parasitics are modeled and calculated with a novel and accurate energy distribution ***,by defining a cost function,the geometry structure of the transformer is optimized to lower the parasitics in the *** pareto-optimal techniques are investigated for the cost function *** models and results are verified by the 3D-finite element method(FEM)and experimental results for several given *** and experimental verifications of this model,make the model suitable for any desirable design in any pulsed power ***,the EMi noise level of the system after optimization is shown and compared to the iEC61800-3 standard.

关键词： EMC/EMi geometry structure pareto-optimal techniques parasitics pulsed power system transformer

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