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synthesis of 4-acylpyrazolone schiff base ligand grafted silica and selectivity in adsorption of lanthanides from aqueous solutions

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Journal of Rare Earths 2009年第5期27卷 870-874页

作者： Ananda s.Amarasekara Onome s.Owereh sukesh K.Aghara Department of Chemistry Prairie View A&M University Department of Chemical Engineering Prairie View A&M University

The schiff base form of the 4-acylpyrazolone ligand was immobilized on the silica surface by reaction of 3-aminopropyl silica with 4-acetyl-5-methyl-2-phenyl-2,4-dihydro-pyrazol-3-one in 97% yield, producing grafted silica with 0.77 mmol/g ligand loading. This surface modified silica was shown to be selective in the adsorption of yb3+ ions from dilute aqueous solutions, for which 98% adsorption was observed from a 1.0×10-5 mol/l aq. solution at pH 6.7, after 24 h at room temperature. six other lanthanides studied Eu3+, Gd3+, Nd3+, Tb3+, sm3+ and la3+ showed moderate to weaker adsorptions of 39%, 28%, 16%, 12%, 11% and 5% respectively under similar conditions.

关键词： 4-acylpyrazolone schiff-base grafted-silica lanthanides adsorption rare earths

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作物需水量与灌溉制度模拟

水利水电技术 1997年第4期28卷 38-43页

作者：刘钰 J.l.Teixeira l.s.Pereira 张汉君中国水利水电科学研究院里斯本技术大学农学院河北省望都灌溉试验站

从作物需水量的基本概念出发，以水量平衡原理为基础，建立了模拟农田根层土壤水循环的计算机模型-IsAREG.这一模型具有多种功能，可模拟根层土壤水分变化，评价给定的灌溉制度，计算作物需水量和灌溉需水量，也可用以制订多种供水限制... 详细信息

从作物需水量的基本概念出发，以水量平衡原理为基础，建立了模拟农田根层土壤水循环的计算机模型-IsAREG.这一模型具有多种功能，可模拟根层土壤水分变化，评价给定的灌溉制度，计算作物需水量和灌溉需水量，也可用以制订多种供水限制条件下的优化灌溉制度．用望都灌溉试验站的小麦、玉米、棉花3种作物两年的试验观测资料对上述模型进行了验证．

关键词：作物需水量灌溉制度计算机模拟

Increasing Water Use Efficiency in Husk Tomato (<i>Physalis ixocarpa</i>Brot) Production in Tabasco, Mexico with Improved Irrigation Water Management

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Journal of Water Resource and Protection 2014年第13期6卷 1248-1258页

作者： Rutilo lópez-lópez Ignacio sánchez Cohen Marco Antonio InzunzaIbarra Andrés Fierro álvarez Gerardo Esquivel Arriaga National Institute of Forestry Agriculture and Livestock Research (INIFAP) Huimanguillo México National Center for Disciplinary Research in soil Water Plant and Atmosphere Relationships (CENID RASPA) INIFAP Gómez Palacio México Metropolitan Autonomous University Unidad Xochimilco Mexico City México

Husk tomato production technology was developed utilizing plastic sheeting and drip irrigation based on the results of reference evapotranspiration and crop coefficients (Kc) proposed at different phenological stages. The objectives of this study were as follows: 1) to evaluate the effect of plastic sheeting on the yield of husk tomato fruit with drip irrigation based on crop evapotranspiration;2) to validate the use of drip irrigation technology and plastic sheeting in husk tomato production using demonstration plots;and 3) to determine the profitability and economic viability of the product in the domestic market. The proposed Kc values were 0.25, 0.71 and 0.56 in the initial, intermediate and final stage of crop development, respectively. Irrigation rates ranged from 2.5 to 6 mm·day-1, which was equivalent to an irrigation time of 0.6 to 2.5 hr. soil moisture tension was monitored with tensiometers at depths of 15 and 30 cm in a loamy eutricfluvisol. The use of plastic sheeting increased husk tomato yield by 56.2% and water productivity by 63.5% under drip irrigation conditions when basing irrigation levels on crop evapotranspiration. soil matrix potential varied between depths of 15 and 30 cm based on irrigation or rainfall amounts and the use of plastic sheeting with values being higher when the plastic sheeting was used. The husk tomato fruit yield in validation plots was 46 and 54.6 t·ha-1 with water use efficiencies ranging from 16.1 to 19.1 kg·m-3. These results exceeded the national average of 14 t·ha-1 and water use efficiency of 2.54 kg·m-3. With this new technology, a cost benefit ratio of 3.6 is obtained, which represents an economically profitable margin for farmers in the region.

关键词： Drip Irrigation Plastic sheeting Water Productivity Profitability

Field Trials of CpGV Virus Isolates Overcoming Resistance to CpGV-M

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Virologica sinica 2009年第5期24卷 470-477页

作者： M. Berling J. -B. Rey s. -J. Ondet y. Tallot O. soubabère A. Bonhomme B. sauphanor M. lopez-Ferber lGEI Ecole des Mines d'Alès. 30319 Alès. France GRAB. Agroparc 84914 Avignon Cedex 9. France Arysta lifescience Route d'Artix B.P. 80 64150 Nogueres. France NPP Arysta LifeScience. 35 Avenue Léon Blum. 64000 Pau France Unité PsH. INRA. Agroparc 84914 Avignon Cedex 9. France

The Cydia pomonella granulovirus (CpGV) has been used for many years as biological agent for codling moth control in apple orchards. Resistance to the Mexican strain of CpGV was detected in orchards in Germany, France and Italy. A laboratory insect colony was started from insects collected in a French resistant orchard. It was named RGV. Various virus isolates were identified as active against this resistant insect colony. Field tests were carried out in 2007 to test if the two virus isolates CpGV-I12 and NPP-R1 were effective in the field. Although these virus isolates were not able to reduce insect caused fruit damages, they significantly reduced the overwintering insect populations. NPP-R1 was subjected to eight passages on RGV larvae (NPP-R1.8) that improved its biological activity on RGV larvae. 2008 field trials were set up to test this improved virus strain, compared to CpGV-I12 and Madex plus active on RGV. These tests confirmed the ability to control both in susceptible and resistant insect populations.

关键词： Cydia pomonella Codling moth Biological control Genotype selection Field trials

Monitoring of rhythms in laset speckle data

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Journal of Innovative Optical Health sciences 2014年第3期7卷 73-82页

作者： D.E.Postnov A.y.Neganova D.D.Postnov A.R.Brazhe Physics Department Saratov State University Astrakhanskaya St.83Saratov 410012Russia Biophysics Department Biological FacutyMoscow State UniversityLeninskie Gory 1Building 12119991 MoscowRussia

While the laser speckle imaging(lsI)is a powerful tool for multiple biomedical applications,suchas monitoring of the blood flow,in many cases it can provide additional information when combined with spatio-temporal rhythm *** demonstrate the application of GraphicsProcessing Units(GPU)-based rhythm analysis for the post procesing of lsI data,discuss therelevant structure of GPU-based computations,test the proposed technique on surrogate 3D data,and apply this approach to kidney blood fiow *** with surrogate data demonstrate the ability of the method to extract information about oscillation patterns fromnoisy data,as well as to detect the moving source of the *** analysis of kidney dataallow us to detect and to localize the dymamics arising from autoregulation processes at the levelof individual nephrons(tubuloglomerular feedback(TGF)rhythm),as well as to distinguishbetween the TGF-active and the TGF-silent zones.

关键词： laser speckle imaging wavelet transform kidney autoregulation.

Validation of Growth and Nutrient Uptake Models for Tomato on a Gravelly south Florida soil Under Greenhouse Conditions

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Pedosphere 2011年第1期21卷 46-55页

作者： D. A. CHIN X. H. FAN y. C. lI Department of Civil and Environmental Engineering University of Miami Coral Gables FL 33124 (USA) Tropical Research and Education Center Soil and Water Science Department University of Florida Homestead FL 33031 (USA)

The soil and Water Assessment Tool(sWAT) has been widely used throughout the world to model crop growth and nutrient uptake in various types of soils.A greenhouse experiment was performed to validate the process equations embedded in sWAT for describing the growth and nutrient uptake of tomatoes in south *** scaled growth curve of greenhouse-grown tomatoes was in close agreement with the theoretical model for field conditions,with the scaling factors being the maximum canopy height and the potential heat ***,the scaled leaf area index(lAI) growth curve and the scaled root depth curve for greenhousegrown tomatoes agreed with the sWAT functions,with the scaling factors being the maximum lAI and maximum root *** greenhouse experiment confirmed that the growth of biomass is a linear function of the intercepted photosynthetically active *** fractions of nutrients in the plant biomass under greenhouse conditions were found to be on the order of 60% of those fractions observed in the *** of the initial P distribution(0.2 mg kg -1),initial ratio of mineral stable P to mineral active P(50:1),and initial ratio of humic N to humic P(2.4:1) were determined from soil measurements and can be used for field *** conventional saturation-excess model for soil-water percolation was used to predict the movement of water in the top 10 cm of the greenhouse containers and the results agreed well with measurements.

关键词： container plants crop modeling Krome soil nitrogen phosphorus

Organic Carbon Changes Over 40-years in a Haplic luvisol Type Farmland in Hungary

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Journal of Agricultural science and Technology(A) 2011年第6期1卷 913-920页

作者： l. Marton F. sandor y. V. Kostyuchenko P. Konvalina Department of Agrochemistry Research Institute for Soil Science and Agricultural Chemistry Hungarian Academy of Sciences Budapest 1022 Hungary Department of Commercial Horticulture and Agriculture Marketing Roots of Peace Darul Aman Road Ayoub Khan Mina Kabul 100004 Afghanistan Heat and Mass Exchange in Geo-systems Department Scientific Centre for Aerospace Research of the Earth of the National Academy of Sciences of Ukraine Kiev 01601 Ukraine Department of Plant Production and Agroecology University of South Bohemia Studentska 133 7005 Czech Republic

It is well known the effect of fertilizer applications in Haplic luvisols after crop production, but long term changes in precipitation and soil organic carbon are not well documented. study aimed to determine the effect of precipitation and fertilization （NPKCaMg） on the changes in soil organic carbon （sOC） in a long-term field experiment set up in Nyirlugos （Nyirs6g region, Hungary： N： 47°41′60″ and E： 22°2′80″ since 1962） on a Haplic luvisol. Over the 40 year period, from 1962 to 2002, sOC pool values ranged between 2.32 and 3.36 mg kg-1. On the untreated control plots the values remained nearly constant （3.31 mg kg-1, ± 0.29 mg kg1 and 0.52 mg kg-1）. NPKCaMg fertilization resulted in a significant （P 〈 0.001） decline （16.6%） in sOC in comparison to the control plots in the Ist 20-year interval, while in the 2nd 20-year period a significant （P 〈 0.001） increased （up to 31.9%） was noticed. During the 40 experimental years the seasonal correlations （R2 among sOC （mg kgl）, WHy and sHy precipitation （mm） ranged from 0.3343 to 0.9078 （on the P 〈 0.001 significance level）. The correlations （R2） on the influence of NPKCaMg fertilization on sOC （mg kg-1） and precipitation （mm） were significant （P 〈 0.001）： the means for WHy, sHy and over the 40 years were 0.4691, 0.6171 and 0.6582, respectively. Organic carbon reserves （mg kg-1） in soils decreased linearly as precipitation increased （from 3.22 to 7.27 mm yr-1）. In case this trend-increasing precipitation caused by climate change reduces sOC in arable soils-will continue, and is aggravated by warming temperatures and a more altering climate （as predicted by climate change forecasts）, the livelihoods of many Hungarian and European farmers may be substantially altered.

关键词： Organic carbon precipitation fertilization crop.

lanthanum(Ⅲ) sorption studies on poly[dibenzo-18-crown-6] and its separation from uranium(Ⅵ) and thorium(Ⅳ) in l-valine medium

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Journal of Rare Earths 2009年第5期27卷 825-829页

作者： s.R.sabale D.V.Jadhav B.s.Mohite Analytical and Environmental Research lab Department of ChemistryShivaji University

The sorption study of la(Ⅲ) was carried out on poly[dibenzo-18-crown-6] and l-valine medium. The quantitative adsorption of la(Ⅲ) was found at 1×10-2 to 1×10-5 mol/l l-valine. The various eluting agents were found efficient eluents for la(Ⅲ). The capacity of crown polymer for la(Ⅲ) was found to be 0.43 ±0.01 mmol/g. The tolerance limit of various cations and anions for la(Ⅲ) was determined. la(Ⅲ) was quantitatively separated from other metal ions in binary as well as multicomponent mixtures. The study was extended to sequential separation of la(Ⅲ), U(VI) and Th(IV). The good separation yields were obtained and had good reproducibility (±2%). The method incorporated the determination of la(Ⅲ) in real sample. The method was simple, rapid and selective.

关键词： la(Ⅲ) l-valine poly[dibenzo-18-crown-6] sorption separation rare earths

Analysis of Charge Exchange spectrum During lower Hybrid Current Drive on HT-7 Tokamak

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中国核科技报告 1999年第S4期 363-364页

作者： s.X.liu B.N.Wan G.l.Kuang X.Gao l.Q.Hu A.l.yao P.J.Qin X.Z.Gong l.Chen y.J.shi J.G.li Institute of Plasma Physics Hefei Anhui 230031 P.R.China Academia sinica

This paper presents the experimental results by charge-exchange fast neutral particle measurements with neutral particle energy analyzer (NPA) in lower hybrid current drive (lHCD) experiments, which firstly show ion heating of lHCD on HT-7 superconducting tokamak. The lHCD experiments on HT-7 tokamak were carried out with the following paramenters: B=1.8 T, I=110～150 kA, n=(0.8～2)×10cm. The lower hybrid wave (lHW) had a pulse duration of 360ms and power of about 300 kW with an peak of parallel refractive index of N=2.9.

关键词： lHCD Analysis of Charge Exchange spectrum During lower Hybrid Current Drive on HT-7 Tokamak HT