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Effect of Elevated Air Temperature and Carbon Dioxide Levels on Dry Season Irrigated Rice Productivity in Bangladesh 预览
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作者 M. Maniruzzaman J. C. Biswas +9 位作者 M. B. Hossain M. M. Haque U. A. Naher A. K. Choudhury S. Akhter F. Ahmed R. Sen S. Ishtiaque M. M. Rahman N. Kalra 《美国植物学期刊(英文)》 2018年第7期1557-1576,共20页
Agricultural productivity is affected by air temperature and CO2 concentration. The relationships among grain yields of dry season irrigated rice (Boro) varieties (BRRI dhan28, BRRI dhan29 and BRRI dhan58) with increa... Agricultural productivity is affected by air temperature and CO2 concentration. The relationships among grain yields of dry season irrigated rice (Boro) varieties (BRRI dhan28, BRRI dhan29 and BRRI dhan58) with increased temperatures and CO2 concentrations were investigated for futuristic crop management in six regions of Bangladesh using CERES-Rice model (DSSATv4.6). Maximum and minimum temperature increase rates considered were 0&deg;C, +1&deg;C, +2&deg;C, +3&deg;C and +4&deg;C and CO2 concentrations were ambient (380), 421, 538, 670 and 936 ppm. At ambient temperature and CO2 concentration, attainable grain yields varied from 6506 to 8076 kg&middot;ha-1 depending on rice varieties. In general, grain yield reduction would be the highest (13% - 23%) if temperature rises by 4&deg;C and growth duration reduction would be 23 - 33 days. Grain yield reductions with 1&deg;C, 2&deg;C and 3&deg;C rise in temperature are likely to be compensated by increased CO2 levels of 421, 538 and 670 ppm, respectively. In future, the highest reduction in grain yield and growth duration would be in cooler region and the least in warmer saline region of the country. Appropriate adaptive techniques like shifting in planting dates, water and nitrogen fertilizer management would be needed to overcome climate change impacts on rice production. 展开更多
关键词 Maximum TEMPERATURE Minimum TEMPERATURE CO2 LEVELS Regional Variability Yield Compensation
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Calibration and Validation of Decision Support System for Agro-Technology Transfer Model for Simulating Growth and Yield of Maize in Bangladesh 预览
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作者 F. Ahmed Apurba K. Choudhury +14 位作者 S. Akhter M. A. Aziz Jatish C. Biswas M. Maniruzzaman M. Main Uddin Miah M. M. Rahman M. A. H. S. Jahan Imrul Mosaddek Ahmed R. Sen S. Ishtiaque A. F. M. Tariqul Islam M. M. Haque M. Belal Hossain Naveen Kalra M. Hafijur Rahman 《美国植物学期刊(英文)》 2017年第7期1632-1645,共14页
Maize is an emerging important crop in Bangladesh because of its high yield potential and economic profitability compared to rice and wheat crops. There is a need to understand the growth and yield behavior of this cr... Maize is an emerging important crop in Bangladesh because of its high yield potential and economic profitability compared to rice and wheat crops. There is a need to understand the growth and yield behavior of this crop in varying production environments of Bangladesh. Crop model such as Decision Support System For Agro-technology Transfer (DSSAT) version 4.6 (DSSAT hereafter) can be utilized cost effectively to study the performances of maize under different production environments. It needs to calibrate and validate DSSAT model for commonly cultivated maize cultivars in Bangladesh and subsequently take the model to various applications, including inputs and agronomic management options and climate change that impacts analyses. So, the present study was undertaken to firstly calibrate DSSAT model for popular four hybrid maize cultivars (BARI Hybrid Maize-7, BARI Hybrid Maize-9, Pioneer 30B07 and NK-40). Subsequently, it proceeded with the validation with independent field data sets for evaluating their growth performances. The genetic coefficients for these cultivars were evaluated by using Genotype coefficient calculator (GENCALC) and Generalized likelihood uncertainty estimation (GLUE) module of DSSAT on the basis of first season experiment. The performance of the model was satisfactory and within the significant limits. After calibration, the model was tested for its performance through validation procedure by using second season data. The model performed satisfactorily through phenology, biomass, leaf area index (LAI) and grain yield. Phenology, as estimated through days to flower initiation and maturity, was in good agreement, although simulated results were slightly over predicted compared to observed values but within the statistical significance limit...when compared with observed values at specific growth stages of the crop. The final yield values (10.12 to 10.59 t·ha-1) were in close agreement with the observed values (10.16 to 10.94 t·ha-1), as the percentage error was within tolerable limit (0.39% 展开更多
关键词 CALIBRATION VALIDATION DSSAT Model and MAIZE
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Investigation and Comparison of 2.4 GHz Wearable Antennas on Three Textile Substrates and Its Performance Characteristics 预览
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作者 M. I. Ahmed M. F. Ahmed A. A. Shaalan 《天线与传播(英文)》 2017年第3期110-120,共11页
In this paper, two different methods were used for investigating the RF characteristics of three types of textile materials. Goch, Jeans and Leather substrates were studied. A microstrip ring resonator method and DAK ... In this paper, two different methods were used for investigating the RF characteristics of three types of textile materials. Goch, Jeans and Leather substrates were studied. A microstrip ring resonator method and DAK (Dielectric Assessment Kit) method were used. Bluetooth antennas were designed and fabricated using these substrates. The results were compared for the two methods. The bending effect of these antennas on its impedance characteristics due to human body movements was also studied. Finally, all antennas were simulated by CST simulator version 2016, fabricated using folded cupper and measured by Agilent 8719ES VNA. The measured results agree well with the simulated results. 展开更多
关键词 WEARABLE ANTENNA TEXTILE Material Ring RESONATOR Method DAK Equipment ANTENNA BENDING
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Effect of using ascorbic acid and cysteamine supplementation onin-vitrodevelopment of buffalo embryos
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作者 Al-shimaa Al-H.H.El-Naby Karima Gh.M.Mahmoud +2 位作者 Gamal A.M.Sosa Mahmoud E.A.Abouel-Roos Youssef f.Ahmed 《亚太生殖杂志(英文版)》 2017年第2期85-88,共4页
Objective:To improvein vitro embryo production in buffalo by supplementation of L-ascorbic acid during maturation and development (experiment 1) and combination with another antioxidant as cysteamine (experiment 2).Me... Objective:To improvein vitro embryo production in buffalo by supplementation of L-ascorbic acid during maturation and development (experiment 1) and combination with another antioxidant as cysteamine (experiment 2).Methods:Two experiments were performed, the first one aimed to evaluate the different concentrations (0, 25, 50, 100 μM) of L-ascorbic acid on embryo developmental rate of buffalo oocytes. The L-ascorbic acid was added to the maturation and culture media. In the second experiment, oocytes were cultured in media with two type of antioxidant (ascorbic acid + cysteamine) or ascorbic acid only.Results:There was a significant increase in cleavage rate at 25, 50 μM than 100 μM and control group. But, the blastocyst rate was higher at 50 μM ascorbic acid than other concentrations (0, 25, 100 μM). Supplementation of ascorbic acid and cysteamine to maturation and cultured media improved embryo development than ascorbic acid alone.Conclusions: Using of 50 μM L-ascorbic acid duringin vitro maturation and development improve the developmental competence of buffalo oocytes, this effect was increase with the presence of cysteamine. 展开更多
关键词 BUFFALO OOCYTES L-ascorbic ACID CYSTEAMINE EMBRYO DEVELOPMENT
Performance Evaluation of Hybrid Green Roof System in a Subtropical Climate Using Fluent 预览
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作者 S. F. Ahmed T. Ahasan +2 位作者 M. G. Rasul M. M. K. Khan A. K. Azad 《电力能源(英文)》 2014年第4期113-119,共7页
Energy disaster is one of the major obstacles in the progress of human society. There are some on-going researches to overcome this for a sustainable environment. Green roof system is one of them which assist to reduc... Energy disaster is one of the major obstacles in the progress of human society. There are some on-going researches to overcome this for a sustainable environment. Green roof system is one of them which assist to reduce energy consumption of the buildings. The green roof system for a building involves a green roof that is partially or completely covered with vegetation and plant over a waterproofing membrane. Green roofs provide shade and remove heat from the air through evapotranspiration, reducing temperatures of the roof surface and the surrounding air. This paper reports the thermal performance of hybrid green roof system for a hot and humid subtropical climatic zone in Queensland, Australia. A thermal model is developed for the green roof system using ANSYS Fluent. Data were collected from two modelled rooms, one connected with green roof system and other non-green roof system. The rooms were built from two shipping containers and?installed at Central Queensland University, Rockhampton, Australia. Impact of air temperature on room cooling performance is assessed in this study. A temperature reduction of 0.95&deg;C was observed in the room with green roof which will save energy cost in buildings. Only 1.7% variation in temperature was found in numerical result in comparison with experimental result. 展开更多
关键词 THERMAL Performance Green ROOF SUBTROPICAL CLIMATE ANSYS FLUENT
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On Line Measurement of Reactivity Worth of TRIGA Mark-II Research Reactor Control Rods 预览
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作者 Nusrat Jahan Mamunur M. Rashid +3 位作者 F. Ahmed M. G. S. Islam M. Aliuzzaman S. M. A. Islam 《现代物理(英文)》 2011年第9期1024-1029,共6页
The reactivity worth measurement system for control rods of the TRIGA MARK-II research reactor of Bangladesh has been design and developed. The theory of the kinetic technique of measuring reactivity has been used by ... The reactivity worth measurement system for control rods of the TRIGA MARK-II research reactor of Bangladesh has been design and developed. The theory of the kinetic technique of measuring reactivity has been used by this measurement system. The system comprises of indigenous hardware and software for online acquisition of neutron flux signals from reactor console and then computes the reactivity worth accordingly. Here for the TRIGA MARK-II research reactor, the reactivity measurement system was implemented with a dedicated circuit assembly and a conventional personal computer. A high-level Visual Basic real-time programming has been developed for data acquisition, reactivity calculation, online display (numerically as well as graphically), saving data, etc. To measure reactivity worth of TRIGA reactor control rods the rod drop experimental technique has been adopted. The results of tests experiments, carried out with the rod drop method for measuring various reactivity worth of control rods have been presented in the paper. A comparison between this results with the results using period method and that of computation method, demonstrated that the response of this reactivity measurement system is fast enough to monitor and measure the safety-related reactivity and power excursions in the reactor. 展开更多
关键词 REACTIVITY WORTH Measurement Control ROD Kinetic ROD DROP Visual Basic
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Effect of Egyptian propolis on cryptosporidiosis in immunosuppressed rats with special emphasis on oocysts shedding,leukogram,protein profile and ileum histopathology
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作者 Hamdy Soufy Nadia M.El-Beih +4 位作者 Soad M.Nasr Tamer H.Abd El-Aziz Fathia A.M.Khalil Youssef f.Ahmed Hala A.A.Abou Zeina 《亚太热带医药杂志:英文版》 SCIE CAS 2017年第3期240-248,共9页
Objective:To investigate the activity of Egyptian propolis extracts(ethanol and water)on cryptosporidiosis in experimentally infected dexamethasone-immunosuppressed rats.Methods:A total of 180 male rats(190-220)g ... Objective:To investigate the activity of Egyptian propolis extracts(ethanol and water)on cryptosporidiosis in experimentally infected dexamethasone-immunosuppressed rats.Methods:A total of 180 male rats(190-220)g BWt were randomly divided into 9 equal groups(G1-G9).Groups of rats were kept as(G1):normal control,(G2-G9):immunosuppressed with dexamethasone and(G3-G9):infected with Cryptosporidium oocysts.Rats from(G4to G9)were given orally ethanol and water extract of propolis(at a dose of 50 mg/kg BWt)and nitazoxanide(standard anti-cryptosporidial drug at a dose of 100 mg/kg BWt)to infected rats with different regimes.Faecal pellets were collected from all groups to monitor oocysts shedding from the 2nd to the 15th day post infection.At the end of the experiment,blood was collected from all groups for determination of leukogram and serum proteins.Ileum specimens were also examined histopathologically.Results:The highest reduction of oocysts shedding in faecal samples was 88%in rats prophylactically treated with propolis ethanol extract at the 4th dpi,and in rats prophylactically treated with water extract of propolis,was91%at the 6th dpi.There was a marked increase in neutrophils count and α2-andβ-globulins levels in infected rats treated with both extracts,while a significant decrease was detected in lymphocytes compared to the infected non treated group.β-globulin level markedly increased in the rats administered nitazoxanide.Histopathological changes were observed in the ileum of rats infected with Cryptosporidium.Conclusions:Egyptian propolis extracts have an activity on cryptosporidiosis in rats.Moreover,propolis modulated the immunity in dexamethasone-immunosuppressed rats. 展开更多
Administration of Zinc with Paroxetine Improved the Forced Swim Test Behavioral Pattern of Treated Mice in Acute and Sub-Acute Study 预览
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作者 Hesham El Refaey Hasan S. Al Amri +1 位作者 Abdelkader E. Ashour Atallah F. Ahmed 《行为与脑科学期刊(英文)》 2015年第7期213-220,共8页
Despite progressive improvement in treating major depressive disorder (MDD), it remains mostly unresponsive to one antidepressant medication. Zinc is a brain highly abundant trace metal, a brain derived neurotrophic f... Despite progressive improvement in treating major depressive disorder (MDD), it remains mostly unresponsive to one antidepressant medication. Zinc is a brain highly abundant trace metal, a brain derived neurotrophic factor (BDNF) inducer, a modulator of synaptic plasticity and potent suppressor of the NMDA receptors. We proposed that co-administration of zinc with the antide-pressants may represent a valuable regimen to improve the efficacy of these drugs. This work has been implemented to evaluate the behavioral changes of acute and sub-acute co-administration of zinc with Paroxtine in mice. Methods: The animals were injected intra-peritoneal with either Paroxtine (20 mg/kg) which was a selective serotonin reuptake inhibitor (SSRI), zinc sulfate (30 mg/kg) or Paroxtine in combination with zinc for one day and one week (once daily). The pattern of the animal behavior was assessed in the forced swim test (FST). Results and Discussion: The behavioral patterns of the animals in the FST include immobility, swimming and climbing. Successful antidepressant should decrease the immobility time with either increase in swimming and/or climbing behavior based on the drug pharmacological activity. Our results revealed a significant decrease of immobility and increase of swimming behavior indicating serotonin-dependent pharmacological activity of Paroxtine or zinc alone as well as in the animals treated with zinc in combination with Paroxtine. There was no significant difference in the animals’ behavior between acute and sub-acute treatment with zinc or even upon its addition to paroxetine. Our data support the concept that co-administration of zinc may provide further antidepressant activity. Zinc may offer additional clinical value particularly in geriatric patients or other populations where zinc level has shown dramatic decrease. 展开更多
关键词 DEPRESSION Antidepressants PAROXETINE ZINC
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Applications of Thermal Imaging in Agriculture—A Review 预览
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作者 Roselyne Ishimwe K. Abutaleb F. Ahmed 《遥感技术进展(英文)》 2014年第3期128-140,共13页
In thermal remote sensing the invisible radiation patterns of objects are converted into visible images and these images are called thermograms or thermal images. Thermal images can be acquired using portable, hand-he... In thermal remote sensing the invisible radiation patterns of objects are converted into visible images and these images are called thermograms or thermal images. Thermal images can be acquired using portable, hand-held or thermal sensors that are coupled with optical systems mounted on an airplane or satellite. This technology is a non-invasive, non-contact and non-destructive technique used to determine thermal properties and features of any object of interest and therefore it can be used in many fields, where heat is generated or lost in space and time. Potential use of thermal remote sensing in agriculture includes nursery and greenhouse monitoring, irrigation scheduling, plants disease detection, estimating fruit yield, evaluating maturity of fruits and bruise detection in fruits and vegetables. This paper reviews the application of thermal imaging in agriculture and its potential use in various agricultural practices. 展开更多
关键词 INFRARED RADIATION INFRARED THERMOGRAPHY Thermal IMAGING CROP AGRICULTURE
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Energy Scenario: Production, Consumption and Prospect of Renewable Energy in Australia 预览
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作者 A. K. Azad M. M. K. Khan +1 位作者 T. Ahasan S. F. Ahmed 《电力能源(英文)》 2014年第4期19-25,共7页
Australia is the world’s 9th largest energy producer, 17th largest consumer of non-renewable energy resources and ranks 18th on a per person energy consumption basis.Australia’s energy consumption is primarily compo... Australia is the world’s 9th largest energy producer, 17th largest consumer of non-renewable energy resources and ranks 18th on a per person energy consumption basis.Australia’s energy consumption is primarily composed of non-renewable energy resources (coal, oil, gas and related products), which represent 96% of total energy consumption. Renewables, the majority of which is bioenergy (wood and wood waste, biomass, and biogas) combined with clear energy namely wind, solar hot water, solar electricity, hydroelectricity account for the remaining 4% consumption.Australia’s renewable energy resources are largely undeveloped which will contribute directly to the Australian economy. In this article, a review of literature on energy scenario is presented and discussed.Australia’s total energy production, consumption, storage and export (including renewable and non-renewable) data has been analyzed and discussed in this study. The main objective of the study is to analyze the prospect of renewable energy inAustralia. This study concludes that Australian economy will grow faster if its undeveloped renewable energies can be used efficiently for electricity generation and transport sector. 展开更多
关键词 RENEWABLE ENERGY Non-Renewable ENERGY Total ENERGY PRODUCTION Electricity Generation Economy
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Crop Discrimination Using Field Hyper Spectral Remotely Sensed Data 预览
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作者 Sayed M. Arafat Mohamed A. Aboelghar Eslam F. Ahmed 《遥感技术进展(英文)》 2013年第2期63-70,共8页
Crop discrimination through satellite imagery is still problematic. Accuracy of crop classification for high spatial resolution satellite imagery in the intensively cultivated lands of the Egyptian Nile delta is still... Crop discrimination through satellite imagery is still problematic. Accuracy of crop classification for high spatial resolution satellite imagery in the intensively cultivated lands of the Egyptian Nile delta is still low. Therefore, the main objective of this research is to determine the optimal hyperspectral wavebands in the spectral range of (400 - 2500 nm) to discriminate between two winter crops (Wheat and Clover) and two summer crops (Maize and Rice). This is considered as a first step to improve crop classification through satellite imagery in the intensively cultivated areas in Egypt. Hyperspectral ground measurements of ASD field Spec3 spectroradiometer was used to monitor the spectral reflectance profile during the period of the maximum growth stage of the four crops. 1-nm-wide was aggregated to 10-nm-wide bandwidths. After accounting for atmospheric windows and/or areas of significant noise, a total of 2150 narrow bands in 400 - 2500 nm were used in the analysis. Spectral reflectance was divided into six spectral zones: blue, green, red, near-infrared, shortwave infrared-I and shortwave infrared-II. One Way ANOVA and Tukey’s HSD post hoc analysis was performed to choose the optimal spectral zone that could be used to differentiate the different crops. Then, linear regression discrimination (LDA) was used to identify the specific optimal wavebands in the spectral zones in which each crop could be spectrally identified. The results of Tukey’s HSD showed that blue, NIR, SWIR-1 and SWIR-2 spectral zones are more sufficient in the discrimination between wheat and clover than green and red spectral zones. At the same time, all spectral zones were quite sufficient to discriminate between rice and maize. The results of (LDA) showed that the wavelength zone (727:1299 nm) was the optimal to identify clover crop while three zones (350:712, 1451:1562, 1951:2349 nm) could be used to identify wheat crop. The spectral zone (730:1299 nm) was the optimal to identify maize crop while three spectral zones were the be 展开更多
关键词 HYPER SPECTRAL DATA CROP DISCRIMINATION
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Genetic Transformation Studies on Avocado Cultivar “Hass” (Persea americana) 预览
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作者 Muhammad F. Ahmed Arumugam S. Kantharajah Paul Holford 《美国植物学期刊(英文)》 2012年第9期1225-1231,共7页
The use of traditional breeding for improvement of avocado cultivars is time consuming, hence other methods such as genetic transformation by Agrobacterium is indispensable to adopt. The strain GV3850/pBI121gave best ... The use of traditional breeding for improvement of avocado cultivars is time consuming, hence other methods such as genetic transformation by Agrobacterium is indispensable to adopt. The strain GV3850/pBI121gave best transformation outcome compared to five other binary vectors (AGL1/pCGP904;AGL1/pBI121;GV3850/pCGP904;LBA4404/pCG-P904 and LBA4404/pBI121) under different pH and acetosyringone concentrations. The optimal condition for reliable transformation was by using 200 μM acetosyringone and a pH of 5.2. Transformed embryonic shoots co-cultivated with GV3850/pBI121 were tested using the histochemical x-gluc assay. Further analysis was conducted by polymerase chain reaction using specific primers for the reporter gene (GUS). 展开更多
关键词 AVOCADO PERSEA Binary VECTORS GUS REPORTER
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Neutron activation analysis of ceramic tiles and its component and radon exhalation rate 预览
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作者 A.El-Shershaby A.Sroor +2 位作者 F.Ahmed A.S.Abdel-Haleem Z.Abdel 《环境科学学报:英文版》 SCIE EI CAS CSCD 2004年第1期 94-99,共6页
The concentrations of 20 trace elements in several ceramics tiles and ceramic composites used in Egypt were elementally analyzed by neutron activation analysis(NAA) technique. The samples and standard were irradiated ... The concentrations of 20 trace elements in several ceramics tiles and ceramic composites used in Egypt were elementally analyzed by neutron activation analysis(NAA) technique. The samples and standard were irradiated with reactor for 4 h( in the Second The gamma-ray spectra obtained were measured for several times by means of the hyper pure germanium detection system( HPGe).Also a solid state nuclear track detector(SSNTD) CR-39, was used to measure the emanation rate of radon for these samples. The radium concentrations were found to vary from 0.39-3.59 ppm and the emanation rates were found to vary from (0.728-5.688) x 10-4The elemental analysis of the ceramic tiles and ceramic composites have a great importance in assigning the physical properties and in turn the quality of the material. 展开更多
关键词 中子活化分析 陶瓷 化学分析 发散率
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人工智能技术在C~3—MIS非集中式决策形成中的应用 预览
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作者 P.Mars Q.F.Ahmed +1 位作者 P.Edwards 陈廷蓬 《舰船电子工程》 1994年第Z2期74-78,共5页
1、引论 复杂的、有抗毁能力的、和敏感的C~3—MIS(指挥控制和通信—管理信息系统)的分析和设计要求分布式决策形成领域在正确定性情况下有新的进展。具体地说,要描述、分解和分析那些必须满足十分苛刻要求的性能,有抗毁能力和敏感规... 1、引论 复杂的、有抗毁能力的、和敏感的C~3—MIS(指挥控制和通信—管理信息系统)的分析和设计要求分布式决策形成领域在正确定性情况下有新的进展。具体地说,要描述、分解和分析那些必须满足十分苛刻要求的性能,有抗毁能力和敏感规格的系统,系统工程方法是必需的。本文是开发C~3—MIS系统的系统分析和设计所要求的理论和算法工具的研究工作的第一步。这种系统的特征是高度的复杂性。关键的特点是决策形成过程分布于若干决策形成“代理人”,在出现多重故障时需要可靠性的操作,以及人与以决策支持系统为基础的计算机的不可避免的交互作用。(1),(2),(3)。 展开更多
关键词 人工智能技术 C~3 MIS 决策形成 决策支持系统 算法工具 学习自动机 确定性情况 自动机理论 多重故障
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早产儿和足月儿骨骼的定量超声评估 预览
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作者 McDevitt H. Tomlinson C. +2 位作者 White M.P. Ahmed S.F. 贺莉 《世界核心医学期刊文摘:儿科学分册》 2005年第12期12-12,共1页
关键词 定量超声 仪器精密度 特异性 上受
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Fabrication of Semiconductor Polymer Membranes Combined with a Colored Charge Transfer Complexes Used in the Manufacture of Solar Cells as a Source of Alternative Energy 预览
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作者 Ahmed.I.El-Shenawy Ishaq.F.E.Ahmed Moamen.S. Refat 《光谱学与光谱分析》 SCIE EI CAS CSCD 北大核心 2019年第7期2307-2315,共9页
The main task of this article was to prepared of new pigment model in situ solar cells accordance to charge-transfer complexes of rhodamine C(RhC) donor as dye laser gain media with iodine(σ-acceptor) and chloranilic... The main task of this article was to prepared of new pigment model in situ solar cells accordance to charge-transfer complexes of rhodamine C(RhC) donor as dye laser gain media with iodine(σ-acceptor) and chloranilic acid, CLA(π-acceptor). The synthesis stoichiometry of these complexes were of 1∶2(donor∶acceptor) with general formulas [(RhC)]I·I3 and [(RhC)(CLA)2]. The discussed data of elemental analysis, conductivity measurements, FT-IR, UV-Vis spectroscopy and photometric titration data visualized the stoichiometry, formula and complexity of the complexes. The physicochemical and spectroscopic analyses obtained suggested that the electron transfer occurred through nitrogen atom in a tertiary amine —N(C2H5)2 of RhC donor with acceptor. The synthesized solid complexes were under go to thermogravimetric analyses to investigate their thermal stability and decomposition steps. The molar conductance measurements revealed that RhC complexes have an electrolytic statement. The thermal stability of rhodamine C complexes was enhanced in comparable with RhC itself. The polymer membranes of poly-methyl methacrylate)(PMMA) combined with the RhC charge(transfer complexes in chloroform solvent have been prepared and characterized by(infrared & electronic) spectroscopy and scanning electron microscopy(SEM) morphological examination. The photo-stability properties of the RhC complexes have been investigated. 展开更多
关键词 CHARGE-TRANSFER RHODAMINE C PHOTOSTABILITY Complexity SPECTROSCOPIC Polymer DYE
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Recovery of some valuable elements from lamprophyre dykes in the Abu Rusheid area, Southeastern Desert, Egypt
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作者 Zaki D.I. Shawky N. +2 位作者 El-Sheikh E.M. Ahmed F.Y. Ibrahim M.E. 《中国地球化学学报:英文版》 EI CAS 2012年第1期 64-73,共10页
在 Abu Rusheid 区域,埃及的东南的沙漠, polymineralized (HREE, U, Zn 和 Pb ) 煌斑岩女同性恋最近被记录。煌斑岩女同性恋沿着份额地区把碎裂的岩石切了成 NNW-SSE 趋势。第二等的 U 矿物质被 uranophane, kasolite, torberni... 在 Abu Rusheid 区域,埃及的东南的沙漠, polymineralized (HREE, U, Zn 和 Pb ) 煌斑岩女同性恋最近被记录。煌斑岩女同性恋沿着份额地区把碎裂的岩石切了成 NNW-SSE 趋势。第二等的 U 矿物质被 uranophane, kasolite, torbernite 和钙铀云母实质上代表。试验性的工作为铀和另外的珍贵元素的恢复在煌斑岩女同性恋上被执行(例如 Zn, Pb 和艾尔) 从工艺的样品的 50 kg。最佳条件是:100 g/L 硫磺的酸集中, 1:5 S/L (固体 / 液体) 并且在房间温度浸泡 15 天。为象艾尔, Zn 和 Pb 一样的铀和另外的元素的恢复的沥滤的效率分别地是 40, 33.6, 98.8 和 78。 展开更多
关键词 有价元素 煌斑岩 岩脉 沙漠 埃及 价值 最佳工艺条件 实验工作
vaccine é的 HBV 疫苗的功效和察觉和 genotyping 在埃及的无征状的突破 HBV 感染 预览 被引量:1
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作者 Eman AE Abushady Magda MA Gameel +3 位作者 John D Klena Salwa F Ahmed Kouka SE Abdel-wahab Sanya M Fahmy 《世界肝病学杂志:英文版(电子版)》 2011年第6期147-156,共10页
AIM:To evaluate the impact of mass vaccination against the hepatitis B virus (HBV) in Egypt,and to search for vaccinee asymptomatic breakthrough HBV infection and its genotype.METHODS:Seven hundred serum samples from... AIM:To evaluate the impact of mass vaccination against the hepatitis B virus (HBV) in Egypt,and to search for vaccinee asymptomatic breakthrough HBV infection and its genotype.METHODS:Seven hundred serum samples from vaccinated children and adults (aged 2-47 years) were used for quantitative and qualitative detection of HBsAb by ELISA.Three hundred and sixty serum samples representing undetectable or low or high HBsAb were screened for markers of active HBV infection (HBsAg,HBcAb (IgG) and HBeAb by ELISA,plus HBsAg by AxSYM) and HBV-DNA genotyping by nested multiplex PCR and by DNA sequencing.RESULTS:It was found that 65% of children aged 2-4 years,and 20.5% aged 4-13 years,as well as 45% adults were good responders to HBV vaccination mounting protective level HBsAb.Poor responders were 28%,59.5% and 34%,and non-responders were 7%,20% and 21% respectively,in the three studied groups.Markers of asymptomatic HBV infections were HBsAg detected by ELISA in 2.5% vs 11.39% by AxSYM.Other markers were HBcAb (IgG) in 1.38%,HBeAb in 0.83%,and HBV-DNA in 7.8%.All had HBV genotype E infection.CONCLUSION:It is concluded that HBV vaccine is efficient in controlling HBV infection among children and adults.The vaccine breakthrough infection was by HBV genotype E.A booster dose of vaccine is recommended,probably four years after initial vaccination. 展开更多
关键词 HBV VACCINE evaluation Egyptain children ADULTS GENOTYPE E VACCINE ESCAPE HBV
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