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Photometric study of an eclipsing binary in Praesepe

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Research in Astronomy and Astrophysics 2013年第4期13卷 465-470页

作者： Devarapalli Shanti Priya Kandulapati Sriram Pasagada Vivekananda rao Department of Astronomy Osmania University Korea Astronomy and Space Science Institute

We present CCD photometric observations of an eclipsing binary in the direction of the open cluster Praesepe using the 2 m telescope at IUCAA Girawali Observatory, India. Though the system was classified as an eclipsing binary by Pepper et al., detailed investigations have been lacking. The photometric solutions using the Wilson-Devinney code suggest that it is a W-type W Uma system and, interestingly, the system parameters are similar to another contact binary system SW Lac.

关键词： binaries: eclipsing - binaries: close -open clusters: Praesepe

Synthesis of some new 3-[5-(2-oxo-2H-3-chromenyl)-1,3-oxazol-2-yl]-1,3-thiazolan-4-ones as antimicrobials

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Chinese Chemical Letters 2010年第9期21卷 1045-1048页

作者： Cherkupally Sanjeeva Reddy L.Sanjeeva rao m.Vani Devi G.Rajesh Kumar A.Nagaraj Department of Chemistry Kakatiya University Department of Pharmaceutical Chemistry Telangana University

A series of some new 2-imino-5-[（Z）-1-（4-methylphenyl）methylidene]-3-[5-（2-oxo-2H-3-chromenyl）-1,3-oxazol-2-yl]-1,3- thiazolan-4-ones 5a-j has been synthesized and assayed for their antibacterial activity against Gram-positive bacteria *** subtilis（ATCC 6633）,Staphylococcus aureus（ATCC 6538p） and micrococcus luteus（IFC 12708）,and Gram-negative bacteria viz. Proteus vulgaris（ATCC 3851）.Salmonella typhimurium（ATCC 14028） and Escherichia coli（ATCC 25922）.Among the screened compounds,5d,5e,5f,5g,and 5j exhibited potent inhibitory activity compared to standard drug,and emerged as potential molecules for further development.

关键词： 1,3-Thiazolan-4-ones 2-Oxo-2H-chromenyl 1,3-Oxazolyl Antibacterial activity

Control of petroleum-hydrocarbon contaminated groundwater by intrinsic and enhanced bioremediation

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Journal of Environmental Sciences 2010年第6期22卷 864-871页

作者： Chih-ming Kao rao Y.Surampalli mu-Sheng Lee Institute of Environmental Engineering "National" Sun Yat-Sen University U.S.Environmental Protection Agency Environmental Protection Bureau Kaohsiung City Government

In the first phase of this study, the effectiveness of intrinsic bioremediation on the containment of petroleum hydrocarbons was evaluated at a gasoline spill site. Evidences of the occurrence of intrinsic bioremediation within the BTEX （benzene, toluene, ethylbenzene, and xylenes） plume included （1） decreased BTEX concentrations; （2） depletion of dissolved oxygen （DO）, nitrate, and sulfate; （3） production of dissolved ferrous iron, methane, and CO2; （4） deceased pH and redox potential; and （5） increased methanogens, total heterotrophs, and total anaerobes, especially within the highly contaminated areas. In the second phase of this study, enhanced aerobic bioremediation process was applied at site to enhance the BTEX decay rates. Air was injected into the subsurface near the mid-plume area to biostimulate the naturally occurring microorganisms for BTEX biodegradation. Field results showed that enhanced bioremediation process caused the change of BTEX removal mechanisms from anaerobic biodegradation inside the plume to aerobic biodegradation. This variation could be confirmed by the following field observations inside the plume due to the enhanced aerobic bioremediation process：（1） increased in DO, CO2, redox potential, nitrate, and sulfate, （2） decreased in dissolved ferrous iron, sulfide, and methane, （3） increased total heterotrophs and decreased total anaerobes. Field results also showed that the percentage of total BTEX removal increased from 92% to 99%, and the calculated total BTEX first-order natural attenuation rates increased from 0.0092% to 0.0188% per day, respectively, after the application of enhanced bioremediation system from the spill area to the downgradient area （located approximately 300 m from the source area）.

关键词： petroleum hydrocarbon groundwater natural attenuation intrinsic bioremediation

Structure, photocatalytic and antibacterial activity study of meso porous Ni and S co-doped TiO2 nano material under visible light irradiation

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Chinese Journal of Chemical Engineering 2019年第7期27卷 1630-1641页

作者： K.V.Divya Lakshmi T.Siva rao J.Swathi Padmaja I.manga Raju m.Ravi Kumar Department of Inorganic and Analytical Chemistry Andhra University

Undoped and Ni–S co-doped mesoporous TiO2 nano materials were synthesized by using sol–gel *** characteristic features of as prepared catalyst samples were investigated using various advanced spectroscopic and analytical *** characterization results of the samples revealed that all the samples exhibited anatase phase(XRD),decreasing band gap(2.68 eV)(UV–Vis-DRS),small particle size(9.2 nm)(TEm),high surface area(142.156 m^2·g^-1)(BET),particles with spherical shape and smooth morphology(SEm);there is a frequency shift observed for co-doped sample(FT-IR)and the elemental composition electronic states and position of the doped elements(Ni and S)in the TiO2 lattice analyzed by XPS and *** results supported the photocatalytic degradation of Bismarck Brown Red(BBR)achieved with in 110 min and also exhibited the antibacterial activity on Staphylococcus aureus(mTCC-3160),Pseudomonas fluorescence(mTCC-1688)under visible light irradiation.

关键词： Sol–gel Ni–S co-doped TiO2 Photocatalysis under visible light Degradation of Bismarck Brown Red Antibacterial activity

可循环使用的Sn-TiO_2/聚噻吩纳米杂化材料用于可见光下降解有机污染物（英文）

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催化学报 2015年第10期36卷 1668-1678页

作者： m.Ravi Chandra T.Siva rao B.Sreedhar 安得拉邦大学化学学院无机和分析化学系印度化学技术研究所无机和物理化学部

采用改进的溶胶-凝胶法在低温制备了Sn-Ti O2/聚噻吩纳米杂化材料(SPNH),运用X射线衍射(XRD)、扫描电镜、X射线光电子能谱(XPS)、红外光谱(IR)、紫外-可见光漫反射光谱(UV-DRS)和BET比表面积分析对所制样品进行了表征.XRD结果证实聚噻吩... 详细信息

采用改进的溶胶-凝胶法在低温制备了Sn-Ti O2/聚噻吩纳米杂化材料(SPNH),运用X射线衍射(XRD)、扫描电镜、X射线光电子能谱(XPS)、红外光谱(IR)、紫外-可见光漫反射光谱(UV-DRS)和BET比表面积分析对所制样品进行了表征.XRD结果证实聚噻吩(PTh)对Ti O2晶相结构没有影响.IR和UV-DRS结果表明,在掺杂的金属氧化物与PTh的纳米杂化和结合过程中,PTh表面与金属氧化物之间存在相互作用(类似核壳结构).XPS结果显示,纳米杂化材料中存在Sn4+以及PTh与Ti O2各自所含的元素.催化剂表面吸附污染物结果发现,SPNH的吸附容量高于Sn-Ti O2纳米粒子(STN).在可见光下降解有机污染物硝基苯(NB)和孔雀绿(mG)的反应中,SPNH表现出比单纯STN更高的光催化活性和稳定性.由于STN上存在聚噻吩,使得样品表面吸附NB(24%)和mG(21%)的能力增加,从而导致更高的光催化收率.考察了该光催化剂在可见光下重复使用5次时的光催化活性,未见PTh的消耗和降解.这些高光催化活性的SPNH材料有望在工业水净化中用作光催化剂.

关键词：锡二氧化钛聚噻吩纳米杂化材料硝基苯孔雀绿可见光光催化可循环使用性

A Distributed model for Real-Time Flood Forecasting in the Godavari Basin Using Space Inputs

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International Journal of Disaster Risk Science 2011年第3期2卷 31-40页

作者： Korada Hari Venkata Durga rao Vala Venkateshwar rao Vinay Kumar Dadhwal Gandarbha Behera Jaswant Raj Sharma National Remote Sensing Centre Indian Space Research Organization (ISRO) Hyderabad 500 625 India

Hydrological modelling of large river catchments has become a challenging task for water resources engineers due to its complexity in collecting and handling of both spatial and non-spatial data such as rainfall,gauge-discharge data,and topographic and hydraulic *** this article,a flood forecast model is developed for the Godavari Basin,India through a distributed modelling approach using space *** approach includes rainfall runoff modelling,hydrodynamic flow routing,calibration,and validation of the model with field discharge *** study basin is divided into 128 subbasins to improve the model *** and hydraulic parameters of each subbasin and channel are computed using the land use/land cover grid that is derived from the Indian Remote Sensing Satellite(IRS–P6) AWi FS sensor data(56 m resolution),Shuttled Radar Topographic mission(SRTm) Digital Elevation model(DEm),and the soil textural *** model is calibrated using the field hydrometeorological data of 2000 and validated with the data of *** model was tested during the 2010 floods with real-time 3-hour interval hydrometeorological and daily evapotranspiration *** in estimating the peak flood discharge and lag time was found to be very *** forecast lead time is increased by 12 hours compared to conventional methods of forecasting.

关键词： flood rainfall meteorological

Characterisation of Neonicotinoid and Pymetrozine Resistance in Strains of Bemisia tabaci(Hemiptera:Aleyrodidae)from China

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Journal of Integrative Agriculture 2012年第2期11卷 321-326页

作者： rao Qiong XU Yong-hua LUO Chen ZHANG Hong-yu Christopher m Jones Greg J Devine KevinGorman Ian Denholm College of Plant Science and Technology Huazhong Agricultural University Wuhan 430070 P.R.China Institute of Plant and Environmental Protection Beijing Academy of Agriculture ＆ Forestry Sciences Beijing 100097 P.R.China Plant and Invertebrate Ecology Department Rothamsted Research Harpenden Herts .4L5 2JQ United Kingdom Zhejiang Chemical Industry Research Institute Zhejiang Branch of National Pesticide R＆D South Center Hangzhou 310023 P.R. China

Four strains of the Q biotype and one of the B biotype of the whitefly Bemisia tabaci collected from China were characterised for resistance to four neonicotinoid insecticides and pymetrozine.Q biotype strains showed moderate to strong resistance to imidacloprid,thiamethoxam and acetamiprid,but little or no cross-resistance to *** to neonicotinoids was consistently associated with resistance to pymetrozine,despite the latter having a distinct（though unresolved）mode of *** single B biotype strain proved largely susceptible to all the insecticides *** in the Q biotype strains was associated with over-expression of a cytochrome P450 monooxygenase gene,CYP6Cm1,whose substrate specificity presumably accounts for the observed cross-resistance profiles.

关键词： P450 cross-resistance pymetrozine imidacloprid thiamethoxam acetamiprid dinotefuran neonicotinoids

Study of Technology of Stripping Nickel Coating on NdFeB Permanent magnet

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Journal of Rare Earths 2004年第Z1期22卷 115-117页

作者： rao Houzeng Li Guohua Jiang Longfa Lin Guanjie Department of Environmental and Chemical Engineering Nanchang Institute of Aeronautical TechnologyNanchang 330034 China Jiangxi Hengda Group Nanchang 330029 China Department of Environmental and Chemical Engineering Nanchang Institute of Aeronautical TechnologyNanchang 330034 China Department of Environmental and Chemical Engineering Nanchang Institute of Aeronautical TechnologyNanchang 330034 China

The influences of category and density of reagents, temperature and the value of pH in the solution of stripping the nickel coating on NdFeB permanent magnet on the stripping result were studied *** practical formular contains mainly the oxidant m-O2NC6H4SO3Na, the complex reagent ( NaOOCCH2 ) 2N( CH2 ) 2N( CH2COOH)2,the reagent of retarding corrosion KF and the calatyze RL-3 was obtained.

关键词： NdFeB permanent magnet base stripping nickel coating reagent of retarding corrosion calatyze

Ground-layer Adaptive Optics for the 2.5 m Wide-field and High-resolution Solar Telescope

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Research in Astronomy and Astrophysics 2024年第3期24卷 224-236页

作者： Ying Yang Lan-Qiang Zhang Nan-Fei Yan Jin-Sheng Yang Zhen Li Teng-Fei Song Xue-Jun rao Chang-Hui rao Key Laboratory on Adaptive Optics Chinese Academy of SciencesChengdu 610209China Institute of Optics and Electronics Chinese Academy of SciencesChengdu 610209China School of Electronic Electrical and Communication Engineering of the University of Chinese Academy of SciencesBeijing 100049China University of Chinese Academy of Sciences Beijing 100049China School of Astronomy and Space Science Nanjing UniversityNanjing 210023China Key Laboratory of modern A&A Ministry of EducationNanjing 210023China Yunnan Observatories Chinese Academy of SciencesKunming 650216.China

The 2.5 m wide-field and high-resolution solar telescope(WeHoST)is currently under developing for solar *** aims to achieve high-resolution observations over a super-wide field of view(FOV)of5′×5′,and a desired resolution of 0.3″.To meet the scientific requirements of WeHoST,the ground-layer adaptive optics(GLAO)with a specially designed wave front sensing system is as the primary *** introduce the GLAO configuration,particularly the wave front sensing *** analytic method,we simulate the performance of both classical AO and GLAO systems,optimize the wave front sensing system,and evaluate GLAO performance in terms of PSF uniformity and correction improvement across whole *** results indicate that,the classical AO will achieve diffraction-limited resolution;the suggested GLAO configuration will uniformly improve the seeing across the full 5′×5′FOV,reducing the FWHm across the axis FOV to less than0.3″(λ≥705 nm,r0≥11 cm),which is more than two times *** specially designed wave front sensor schedule offers new potential for WeHoST’s GLAO,particularly the multi-FOV GLAO and the flexibility to select the detected *** capabilities will significantly enhance the scientific output of the telescope.

关键词： instrumentation adaptive optics-instrumentation detectors-instrumentation high angular resolution-methods numerical-telescopes-Sun activity