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Anti-dermatophytic activity of marine sponge,Sigmadocia carnosa(Dendy)on clinically isolated fungi

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Asian Pacific Journal of Tropical Biomedicine 2012年第8期2卷 635-639页

作者： NB Dhayanithi TT Ajith Kumar m Kalaiselvam T Balasubramanian N Sivakumar Centre of Advanced Study in marine Biology Faculty of Marine SciencesAnnamalai University Department of molecular microbiology School of BiotechnologyMadurai Kamaraj University

Objective:To screen the anti-fungal effects and find out the active metabolites from sponge, Sigmadocia carnosa(***) against four dermatophytic ***:The methanol,ethyl acetate and acetone extract of marine sponge,*** was examined against Trichaphyton mentagrophytes(***),Trichophyton rubrum(***),Epidermophyton floccosum(***) and microsporum gypseum(***) and qualitative analysed to find out the active ***:The methanol extract of sponge was expressed significant activity than ethyl acetate and *** minimum inhibitory concentration(mIC) of methanol extract of sponge that resulted in complete growth inhibition of ***,***, *** and *** were found to 125,250,250 and 250 μg/mL ***, 100%inhibition of fungal spore germination was observed in *** at 500 μg/mL concentration followed by ***,*** and *** at 1000 μg/mL concentration. Other two extracts showed weak anti spore germination activity against the tested dermatophyte *** extracts showed presence of terpenoids,steroids,alkaloids,saponins and ***:Based on the literature,this is the first study which has conducted to inhibit the growth and spore germination of dermatophytic fungi with *** research also needs to purify and characterize the secondary metabolites from the sponge,*** for the valuable source of novel substances for future drug discovery.

关键词： Dermatophytic fungi Sigmadocia Carnosa Anti-fungal activity Spore germination assay Qualitative analysis of Active compounds

Rietveld refinement of powder X-ray diffraction,microstructural and mechanical studies of magnesium matrix composites processed by high energy ball milling

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Journal of magnesium and Alloys 2018年第4期6卷 390-398页

作者： T.Ramkumar m.Selvakumar R.Vasanthsankar A.S.Sathishkumar P.Narayanasamy G.Girija Department of mechanical Engineering Dr.Mahalingam College of Engineering and TechnologyPollachi 642003India Department of Automobile Engineering Dr.Mahalingam College of Engineering and TechnologyPollachi 642003India Department of mechanical Engineering Sree Sowdambika College of EngineeringAruppukottai 626134India Department of mechanical Engineering Kamaraj College of Engineering and TechnologyVirudhunagar 626001India

This research reports the processing of magnesium matrix composites reinforced with silicon carbide(SiC)and aluminium oxide(Al_(2)O_(3))using powder metallurgy technique through high energy *** of mg-SiC and mg-Al_(2)O_(3)composites subjected to high energy ball milling for different vol%of secondary particles 20,30 and 40%of SiC and Al_(2)O_(3)are studied by X-Ray diffraction *** rietveld method as implemented in the Fullprof program is applied in order to determine the quantities of the resulting crystalline phases and amorphous phases at each stage of the mechanical *** examination is carried out using Scanning Electron microscope(SEm).In addition,crystal structural analysis using appropriate size and strain models is performed in order to handle the distinctive anistrophy that is observed in convinced crystallographic directions for the magnesium *** results are furnished in terms of crystalline domains size enlargement of the magnesium composites phases upon prolonged milling duration and discussed in the light of up to date views and theories on crystal growth of nanocrystaline *** hardness of the composite samples is calculated by Vickers’s Hardness ***,dry sling wear test and corrosion test are performed for the fabricated *** with 30%secondary particles incorporated magnesium composites exhibits better wear and corrosion resistance than the other composites.

关键词： Rietveld refinement X-ray diffraction Crystal structure micro structure Wear and corrosion

给新生儿补充维生素A对其早期死亡率的影响:印度南部社区的群体随机试验

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英国医学杂志中文版 2004年第2期7卷 126-126页

作者： Lakshmi Rahmathullah James m Tielsch R D Thulasiraj Joanne Katz Christian Coles Sheela Devi Rajeesh John Karthik Prakash A V Sadanand N Edwin C kamaraj 吕小东

目的:评定给新生儿补充维生素A对其6个月大时死亡率的影响。设计:群体、随机、双盲、安慰剂对照试验。地点:印度南部2个农村社区。

关键词：新生儿维生素A补充早期死亡率印度南部试验

Architectural Design of 32 Bit Polar Encoder

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Circuits and Systems 2016年第5期7卷 551-561页

作者： G. Indumathi V. P. m. B. Aarthi Alias Ananthakirupa m. Ramesh Department of Electronics and Communication Engineering Mepco Schlenk Engineering College Sivakasi India Department of Electronics and Communication Engineering Kamaraj College of Engineering and Technology Virudhunagar India

The rapid development in the digital circuit design enhances the applications on very large scale integration era. Encoders are one among the digital circuits found in all communication systems. The polar encoding is mainly meant for its channel achieving property. It finds its application in communications, sensing and information theory. This coding proposed by Erdal Arikan is significant because of its zero error floors and simple architecture for hardware implementation. In this paper, a folded polar encoder is designed to start from the fully parallel architecture and proceeds with its data flow graph, delay requirement calculation, lifetime analysis and register allocation, which results in a very large scale integration architecture with minimum hardware utilization. The results are simulated for 4 and 8 parallel folded 32-bit polar encoder using Xilinx 14.6 ISIm and implemented in Virtex 5 field programmable gate array. A comparison is made on fully parallel and various folding techniques based on their resource utilization.

关键词： Polar Encoder Folding Very Large Scale Integration (VLSI) Architecture Field Programmable Gate Array (FPGA)

The Effective Enhancement of Power System Security by Flexible Transmission Line Impedance with minimal Rescheduling of Generators

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Circuits and Systems 2016年第4期7卷 381-389页

作者： Karuppasamy muthulakshmi R.m. Sasiraja Selvarajan mukesh muthu Department of Electrical and Electronics Engineering Kamaraj College of Engineering and Technology Virudhunagar Tamilnadu India Department of Electrical and Electronics Engineering Anna University Regional Campus Madurai Madurai Tamilnadu India

After the digital revolution, the power system security becomes an important issue and it urges the power producers to maintain a well secured system in order to supply a quality power to the end users. This paper presents an integrated Corrective Security Constrained Optimal Power Flow (CSCOPF) with Flexible Transmission Line Impedance (FTLI) to enhance the power system security. The corrective approach of SCOPF is chosen, because it allows the corrective equipment to bring back the system to a stable operating point and hence, it offers high flexibility and better economics. The concept of FTLI arises from the ability of FACTS devices such as Thyristor Controlled Series Capacitor (TCSC), which can vary the line reactance to a certain extent. An enhanced security can be achieved by incorporating FTLI into the CSCOPF problem, since the power flow in a system is highly dependent on the line reactance. FTLI based CSCOPF can reduce the amount of rescheduling of generators, but it will result in an increased number of variables and thus, the complexity to the optimization process is increased. This highly complex problem is solved by using nonlinear programming. The AC based OPF model is preferred, since the corrective security actions require highly accurate solutions. IEEE 30 bus system is used to test the proposed scheme and the results are compared with the traditional CSCOPF. It can be seen that the proposed idea provides a notable improvement in the reduction of cost incurred for restoring the system security.

关键词： Flexible Transmission Line Impedance Power System Security Security Constrained Optimal

X-Ray Crysatllographic and Vibrational Spectroscopic Studies of Thorium Bromate Hydrate

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Crystal Structure Theory and Applications 2013年第2期2卷 70-74页

作者： m. Junaid Bushiri T. C. Kochuthresia S. Athimoolam V. Ramakrishnan V. K. Vaidyan Department of Physics Cochin University of Science and Technology Kochi India Department of Physics University of Kerala Thiruvananthapuram India Department of Physics University College of Engineering Anna University Tirunelveli Region Nagercoil India School of Physics Madurai Kamaraj University Madurai India

Th(BrO3)3·H2O single crystals were grown from its aqueous solution at room temperature. Single crystal XRD, Raman and FTIR techniques were used to investigate the crystal structure. The crystal structure was solved by Patterson method. The as grown crystals are in monoclinic system with space group P21/c. The unit cell parameters are a = 12.8555(18) ?, b = 7.8970(11) ?, c = 9.0716(10)?, α = 90°, β = 131.568° and γ = 90° and unit cell volume is 689.1(2)?3. Z = 8, R factor is 5.9. The Raman and FTIR studies indicate the lowering of symetry of bromate anion from C3V to C1. Hydrogen bonds with varying strengths are present in the crystal. The centrosymmetric space group P21/c of the crystal is confirmed by the non-coincidence of majority of Raman and IR bands.

关键词： Thorium Bromate X-Ray Diffraction IR Spectroscopy Raman Crystal Structure Anion

Crystal Growth, Thermal, mechanical and Optical Properties of a New Organic Nonlinear Optical material: Ethyl P-Dimethylamino Benzoate (EDmAB)

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Journal of minerals and materials Characterization and Engineering 2011年第1期10卷 1-11页

作者： V. Natarajan J. Kalyana Sundar P. Selvarajan m. Arivanandhan K. Sankaranarayanand S. Natarajan Y. Hayakawa Department of Physics Aditanar College of Arts and Science Tiruchendur India Research Institute of Electronics Shizuoka University Johoku 3-5-1 Hamamatsu Japan. School of Physics Alagappa University Karaikudi-630003 India. School of Physics Madurai Kamaraj University Madurai-625021 India.

An organic material, namely, ethyl p-dimethylamino benzoate was crystallized for the first time by solution growth technique using pure and mixed solvents. Growth kinetics and morphology changes with solvents were investigated based on solute –solvent interactions of pure and mixed solvents. An appropriate mixed solvent for high quality crystals with well-defined morphology is reported. The absence of solvent molecules and the presence of various functional groups of the grown sample were qualitatively confirmed by FTIR spectroscopic studies. Thermal properties of the grown sample were analyzed by TG and DTA analysis. mechanical properties of the EDmAB crystal were investigated by micro hardness studies. moreover, the grown crystal shows high transparency in the visible and near IR regions. The material shows relatively high SHG efficiency than that of KDP.

关键词： Organic compounds Crystal growth - Optical properties

Effect of imidazole based polymer blend electrolytes for dye-sensitized solar cells in energy harvesting window glass applications

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中国化学工程学报（英文版） 2019年第11期

作者： K.m.manikandan A.Yelilarasi S.S.Saravanakumar P.Senthamaraikannan Anish Khan Abdullah m.Asiri Department of Physics， kamaraj College of Engineering and Technology Department of mechanical Engineering， kamaraj College of Engineering and Technology Chemistry Department， Faculty of Science， King Abdulaziz University Center of Excellence for Advanced materials Research， King Abdulaziz University

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太阳紫外辐射增加对陆地植物的影响

人类环境杂志 1995年第3期24卷 165-172页

作者： martyn m.Caldwell Alan H.Teramura manfred Tevini Janet F.Bornman Lars Olof Bjrn G.Kulandaivelu 王普才 Ecology Center Utah State University Logan Utah 84322-5230 USA Office of the Dean University of Hawaii at manoa College of Natural Sciences Bilger Hall 102 2545 The Mall Honolulu Hawaii 96822 Co chair UNEP Effects Panel Inst. f. Botanik Ⅱ Kaiserstrasse 12D-76128 Karlsruhe Plant Physiology Lund University P.O.Box 117 S-22100 Lund Sweden Plant Physiology Lund University P. O. Box 117 S-22100 LundSweden School of Biological Sciences madurai kamaraj University madurai 625021 India

植物的生理和发育过程受到UV-B辐射的影响,甚至受当前阳光中的UV-B量影响。植物也有几种机制来改善和补偿这种影响,可以在一定程度上进行调节以适应UV-B水平的提高。然而植物生长会直接受到UV-B辐射的影响。不同物种对UV-B辐射的响应差... 详细信息

植物的生理和发育过程受到UV-B辐射的影响,甚至受当前阳光中的UV-B量影响。植物也有几种机制来改善和补偿这种影响,可以在一定程度上进行调节以适应UV-B水平的提高。然而植物生长会直接受到UV-B辐射的影响。不同物种对UV-B辐射的响应差异很大,同一物种的这种响应也会因栽培品种的不同而变化。在农业方面有必要采用对UV-B辐射有较大承受能力的品种和培育新的物种。对森林和草原,这种响应可能会导致物种组成的变化,这就意味着不同生态系统生物多样性的变化。UV-B引起的间接变化例如植物形态,部分植物生物量的比例分配,发育阶段和二次代谢时间调整等方面的变化或许与UV-B的损害作用同等重要,甚至有时更为重要。这些变化对植物的竞争平衡、食草动物、植物病原体和生物地球化学循环均有重要意义。这些对生态系统层次的影响是可以预料的,但不易预测或估价。太阳UV-B在生态系统层次上的研究才刚刚开始。其它因素,包括与气候变化有关的因素如CO_2含量增加也会与UV-B辐射相互作用。这样的相互作用不易预测,但在农业和非农业生态系统中显然是很重要的。

关键词：太阳紫外辐射增加陆地植物