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Sathish K.V.,Sridhar K.N.,Seenappa L.,Manjunatha H.C.,Vidya Y.S.,Chinnappa Reddy B.,Manjunatha S.,Santhosh A.N.,Munirathnam R.,Raj Alfred Cecil,Damodara Gupta P.S.,Sankarshan B.M. 한국원자력학회 2023 Nuclear Engineering and Technology Vol.55 No.5
For the first time Aluminium-BariumeZinc oxide nanocomposite (ZABONC) was synthesized by solution combustion method where calcination was carried out at low temperatures (6000 C) to study the electromagnetic (EM) (X/g) radiation shielding properties. Further for characterization purpose standard techniques like PXRD, SEM, UV-VISIBLE, FTIR were used to find phase purity, functional groups, surface morphology, and to do structural analysis and energy band gap determination. The PXRD pattern shows (hkl) planes corresponding to spinel cubic phase of ZnAl2O4, cubic BaðNO3Þ2, a and g phase of Al2O3 which clearly confirms the formation of complex nano composite. From SEM histogram mean size of nano particles was calculated and is in the order of 17 nm. Wood and Tauc’s relation direct energy band gap calculation gives energy gap of 2.9 eV. In addition, EM (X/g) shielding properties were measured and compared with the theoretical ones using standard procedures (NaI (Tl) detector and multi channel analyzer MCA). For energy above 356 keV the measured shielding parameters agree well with the theory, while below this value slight deviation is observed, due to the influence of atomic/crystallite size of the ZABONC. Hence synthesized ZABONC can be used as a shielding material in EM (X/g) radiation shielding
Sathish K. Ponniah,Zhenhua Shang,M. Aydın Akbudak,Vibha Srivastava,Muthusamy Manoharan 한국식물생명공학회 2017 Plant biotechnology reports Vol.11 No.1
Rice straw is one of the largest biomasses in the world that can potentially be exploited for biofuel. Nevertheless, the association of lignin with cellulose and hemicellulose has hindered the efficient utilization of rice straw for cellulosic biofuel. The objective of this study was to down-regulate key genes involved in lignin biosynthesis pathway, such as hydroxycinnamoyl CoA: shikimate hydroxycinnamoyl transferase (HCT), cinnamoyl CoA reductase (CCR), and cinnamyl alcohol dehydrogenase (CAD), through “terminator-less” constructs to reduce lignin in transgenic rice. Real-time qPCR analyses of the selected T1 transgenic rice plants indicated 36–86% transcript reduction in HCT lines, 75–94% in CCR lines, and 10–85% in CAD lines. Of the nine down-regulated lines (three lines from each genes) subjected to lignin analysis, seven showed significant reduction in total lignin content (HCT-4, HCT-7, CAD-1, CAD-7, CCR-3, CCR-7, and CCR-12) with lignin reduction ranging from 4.6 to 10.8%. The results from this study indicated that truncated gene fragments lacking transcription termination sequence can be used for down-regulation of lignin genes in rice, and the rice straw from these transgenic lines could be useful as feedstock for cellulosic biofuel.
K. Nithya,Asha Sathish,P. Senthil Kumar,T. Ramachandran 한국공업화학회 2018 Journal of Industrial and Engineering Chemistry Vol.59 No.-
Superparamagnetic iron oxide nanoparticles were synthesized using co-precipitation technique by dissolving required stoichiometric proportions (1:2) of Fe2+ and Fe3+ salts in water. Lantana camara extract and ammonia solution were used as the stabilizing and precipitating agents, respectively. The prepared particles were characterized using FTIR, TGA, PSA, SEM–EDAX and zeta potential analysis. This material was successfully adopted for the removal of Ni(II) ions from aqueous solution and the process parameters were optimized. The results indicated the faster kinetics and a remarkably higher adsorption capacity of 227.20 mg/g at a pH of 6.0 and an adsorbent dose of 0.05 g.
Fe-DECORATED FULLERENE (C60) NANOWHISKERS FOR ENVIRONMENTAL APPLICATION
M. SATHISH,K. MIYAZAWA 성균관대학교(자연과학캠퍼스) 성균나노과학기술원 2008 NANO Vol.3 No.5
Fe-decorated fullerene nanowhiskers were prepared by using the liquid–liquid interfacial precipitation method. The prepared nanowhiskers were characterized using scanning electron microscopy (SEM), scanning transmission electron microscopy (STEM), X-ray diffraction (XRD) and Raman spectroscopy. Formation of both tubular and nontubular nanowhiskers was observed with fine dispersion of Fe ions. The XRD and Raman-spectroscopic studies showed the fcc crystalline nature and polymerization of the nanowhiskers, respectively. The results were compared with Ce- and Ni-incorporated fullerene nanowhiskers.
C. Sailaja,K.T. Thilagham,K.T. Anand,P. Ganeshan,Sathish Kannan,A.H. Seikh,A. Ghosh 한양대학교 청정에너지연구소 2023 Journal of Ceramic Processing Research Vol.24 No.4
The reinforcing impact of TiB2 nanoparticles (TiB2np) and alumina nanoparticles (Al2O3np) in an aluminum (LM14) alloybase matrix composite was studied. Stir casting was used to create the hybrid aluminum matrix-based nanocomposites(AMNC) specimens. When nanoparticles are mixed into a matrix, the resulting material is stronger than LM14 aluminumalloy. The results of the EDAX and SEM studies clearly illustrate the distribution of reinforcing particle sizes. Compressionand density tests on AMNC specimens are contrasted with those on LM14 aluminum alloy tests. The increase in theirmechanical characteristics is influenced by the proportion of reinforcements in the matrix phase. Nanocomposites based onan aluminum matrix outperform the metal in terms of compressive strength, density, and abrasion resistance.
V.C. Sathish Gandhi,R. Kumaravelan,S. Ramesh,K. Sriram 국제구조공학회 2015 Structural Engineering and Mechanics, An Int'l Jou Vol.53 No.5
The study aims on the effect of material dependency in elastic- plastic contact models by contact analysis of sphere and flat contact model and wheel rail contact model by considering the material propertieswithout friction. The various materials are selected for the analysis based on Young‟s modulus and yield strength ratio (E/Y). The simulation software „ANSYS‟ is employed for this study. The sphere and flat contact model is considered as a flattening model, the stress and strain for different materials are estimated. The simulation of wheel-rail contact model is also performed and the results are compared with the flattening model. The comparative study has also been extended for finding out the mean contact pressurefor different materials the E/Y values between 150 and 660. The results show that the elastic-plastic contact analysis for materials up to E/Y=296.6 is depend on the nature of material properties and also for this material the mean contact pressure to yield strength reaches 2.65.
B. Somasundaram,K.T. Anand,D. Kirubakaran,P. Ganeshan,Sathish Kannan,A.H. Seikh,A. Ghosh 한양대학교 청정에너지연구소 2023 Journal of Ceramic Processing Research Vol.24 No.4
Metal-based composites, such as those used in the aerospace and automotive industries, are becoming increasingly popular dueto their intrinsic advantages like higher strength-to-weight ratios and less wear rates. An aluminium 7475 alloy based on MMCwas tested using the Taguchi design of the experiment. The major goal is to use the Taguchi method to anticipate the bestparameters for castings with the highest tensile strength and hardness. Good quality castings can only be made with precisecontrol of the process parameters. Stir casting was employed to make test samples with varying reinforcement weightpercentages, stirring speeds, and processing temperatures. Analytical variance and orthogonal arrays were used to explore theinfluence of process factors on the desired attributes. The Taguchi method was used to identify the best settings for maximizingthe mechanical characteristics of composites. The fundamental objective of this investigation is to find how various parameterscan be altered to produce defect-free castings with the necessary tensile strength and hardness for certain applications. TheTaguchi optimization method was demonstrated by conducting a test at the optimal level of processing parameters.
B. Adil,K. M. Shankar,B. T. Naveen Kumar,Rajreddy Patil,Abhiman Ballyaya,K. S. Ramesh,Sathish Rama Poojary,Omkar V. Byadgi,Prabhugouda Siriyappagouder 대한수의학회 2013 Journal of Veterinary Science Vol.14 No.4
A monoclonal antibody-based flow-through immunoassay (FTA) was developed using a nitrocellulose membrane placed on the top of adsorbent pads enclosed in a plastic cassette with a test zone at the center. The FTA could be completed within 10 min. Clear purple dots against a white background indicated the presence of Aphanomyces (A.)invadans. The FTA limit of detection was 7 μg/mL for A. invadans compared to 56 μg/mL for the immunodot. FTA and polymerase chain reaction (PCR) could detect A. invadans in fish tissue homogenates at a 10-11 dilution compared to a 10-8 dilution by immunodot. In fish suffering from natural cases of epizootic ulcerative syndrome (EUS)collected from Mangalore, India, FTA and PCR could detect A. invadans in 100% of the samples compared to 89.04%detected by immunodot. FTA reagents were stable and produced expected results for 4 months when stored at 4∼8oC. This rapid test could serve as simple and cost-effective on-site screening tool to detect A. invadans in fish from EUS outbreak areas and in ports during the shipment of live or frozen fish.
T. Yogashanthi,Shakeela Sathish,K. Ganesan 한국지능시스템학회 2023 INTERNATIONAL JOURNAL of FUZZY LOGIC and INTELLIGE Vol.23 No.1
Setup time is the amount of time required for a machine to adjust its settings or the preparation of a device at each stage to process and deliver a fully finished job. A new approach for n job 2 machine generalized intuitionistic fuzzy flow shop scheduling problem subject to setup time has been proposed. When the machines are kept at different places then the transporting time and return time of transport play a significant role in the production. Generalized triangular intuitionistic fuzzy numbers are considered to represent processing time, setup time, transportation time, and return time. The aim of this work is to minimize the intuitionistic fuzzy total production time with less vagueness.