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Chinese Journal of Chemistry 2011年第7期29卷 1483-1488页

作者： Muthyala, Manoj kumar Rao, v. Kameswara kumar, Anil Department of Chemistry Birla Institute of Technology and Science Pilani 333 031 India

A facile and efficient one-pot three-component synthesis of bis（5-methyl-2-furyl）methanes has been achiev.d v.a the reaction of 2-methylfuran with a series of aliphatic and aromatic aldehydes and aliphatic ketones in presence of copper（II） triflate under solv.nt free conditions. The bis（5-methyl-2-furyl）methanes were obtained in 34%--72% yields and the catalyst was recycled up to four successiv. cycles without much loss in catalytic activ.ty.

关键词： Lewis acid copper(II) triflate 2-methylfuran bis(5-methyl-2-furyl)methane multicomponent condensation solv.nt free condition

Refractiv. Index and Electronic Polarizability of Ternary Chalcopyrite Semiconductors

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Chinese Physics Letters 2015年第12期32卷 147-151页

作者： kumar v. SINHA Anita SINGH B.P. SINHA A.P. JHA v. Department of Electronics Engineering Indian School of Mines

Simple models are proposed for the calculation of refractiv. index n and electronic polarizability α of AⅠBⅢC2Ⅵ and AⅡBⅣC2Ⅴ compounds of groups of chalcopyrite semiconductors from their energy gap data. The v.lues family and 12 compounds of AⅡBⅣC2Ⅴ family are calculated for the work. The proposed models are applicable for the whole range of energy gap materials. The calculated v.lues are compared with the av.ilable experimental and reported v.lues. A fairly good agreement between them is obtained.

关键词： Te In Refractiv. Index and Electronic Polarizability of Ternary Chalcopyrite Semiconductors

利用Cv.法由松节油催化分解合成微米炭纤维

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新型炭材料 2011年第5期26卷 356-360页

作者： Kanchan Saxena Pramod kumar v. K. Jain Amity Institute of Adv.nced Research and Studies (Materials and Dev.ces) Amity University Noida U. P. India

以石墨为基体,硫酸镍为催化剂,利用化学气相沉积通过松节油的催化分解合成了微米炭纤维。利用酸处理和水洗的方法将纤维从石墨和金属杂质中分离出来。利用光学显微镜和扫描电镜发现得到的纤维直径在3μm～5μm。同时,由于自组装的作用... 详细信息

以石墨为基体,硫酸镍为催化剂,利用化学气相沉积通过松节油的催化分解合成了微米炭纤维。利用酸处理和水洗的方法将纤维从石墨和金属杂质中分离出来。利用光学显微镜和扫描电镜发现得到的纤维直径在3μm～5μm。同时,由于自组装的作用也生成了一些海绵状的微米纤维。

关键词：微米炭纤维松节油硫酸镍石墨化学气象沉积

Effect of Heat Treatment on Tensile and Corrosion Properties of LM6 Hybrid Metal Matrix Composite Reinforced with Cenosphere and Red Mud

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Journal of Minerals and Materials Characterization and Engineering 2019年第1期7卷 1-17页

作者： Rav. kumar v. Suresh R. Prakash Rao C. R. Rav. kumar D. v. Bharat v. Department of Mechanical Engineering Global Academy of Technology Bengaluru India Department of Industrial & Automation Engineering VTU PG Centre Mysuru India

The increased expectation of automotiv., av.ation and marine industries pertaining to the enhanced properties and their use in elev.ted temperature conditions and also corrosiv. env.ronments leads to the dev.lopment of the newer material to meet the requirements. The requirements of the automobile and marine applications call for the increased mechanical properties and lower density accompanied with higher resistance to oxidation. Hence the present research work is aimed at the dev.lopment of Hybrid metal matrix composites (HMMCs) using low-density base material and reinforcements. The aluminum of grade LM6 is preferred material in automobile industries, because it can be cast to any complex geometry and possess good machinability, further upon heat treatment, the properties of LM6 alloy can be enhanced to meet the industry requirements. Howev.r, requirements of automobile industries consist of increased mechanical properties, lower density and higher corrosion resistance. Hence, in the present research work, it is aimed to dev.lop newer composite material using LM 6 grade Aluminum alloy as matrix material which is reinforced with v.ried percent Cenosphere and Red mud.

关键词： LM6 Alloy Cenosphere Red Mud HMMCs Tensile Test NaCl NaOH Salt Spray Test Immersion Corrosion Test

Corrosion Behav.or of Cenosphere Reinforced Al7075 Metal Matrix Composite —An Experimental Approach

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Journal of Minerals and Materials Characterization and Engineering 2018年第3期6卷 424-437页

作者： Rav. kumar D. v. Seenappa C. R. Prakash Rao v. Bharat Department of Mechanical Engineering Global Academy of Technology Bengaluru India Department of Mechanical Engineering Government Engineering College Ramanagara India

Aluminum-based metal matrix composites (MMCs) are considered in sev.ral technological applications owing to their enhanced mechanical properties when compared with monolithic metals. Research on the mechanical properties MMCs was done by many researchers;howev.r in depth study on the oxidation behav.or of cenosphere, reinforced MMCs are required, since the application of Aluminum-based MMCs is extensiv.ly used in applications like automobile, nav.gation and av.ation, where the demand on light weight corrosion resistance material is v.ry much required. In the present work v.ried compositions of Al7075 grade Aluminum-cenosphere composites use liquid metallurgy route adopting stir casting approach. The experimental study was aimed at experimental inv.stigations of dev.loped composites under different corrosiv. env.ronments. The corrosion tests were carried out as per ASTM standards. Salt spray test using NaCl was carried out as per ASTM B117 and immersion tests using NaCl and NaOH as corrodents were carried out by following ASTM G31 standards. The results obtained from the tests rev.aled that as increase in weight % of reinforcement, corrosion resistance increases up to 7.5% reinforcement, and further the corrosion resistance decreases marginally. Solution heat treated samples exhibited higher resistance to oxidation than cast samples in all corrosiv. env.ronments. The SEM images show the presence of micro cracks and occurrence of pitting corrosion on the corrosion tested specimens.

关键词： Al7075 Cenosphere Metal Matrix Composites NaCl NaOH Salt Spray Test Corrosion Wear

Stability Analysis of DC Microgrid Clusters Based on Step-by-step System Matrix Building Algorithm

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Journal of Modern Power Systems and Clean Energy 2024年第3期12卷 900-912页

作者： K.Jithin N.Mayadev. R.Hari kumar v.P.Mini the Department of Electrical Engineering College of Engineering TrivandrumAPJ Abdul Kalam Technological University(APJAKTU)ThiruvananthapuramIndia

DC microgrids(DCMGs)are made up of a network of sources and loads that are connected by a number of power electronic conv.rters(PECs).The increase in the number of these PECs instigates major concerns in system *** interconnecting the microgrids to form a cluster,the system stability must be *** paper proposes a nov.l stepby-step system matrix building(SMB)algorithm to update the system matrix of an existing DCMG cluster when a new microgrid is added to the cluster through a distribution *** stability of the indiv.dual DCMGs and the DCMG cluster is analyzed using the eigenv.lue ***,the particle swarm optimization(PSO)algorithm is used to retune the controller gains if the newly formed cluster is not *** simulation of the DCMG cluster is carried out in MATLAB/Simulink env.ronment to test the proposed *** results are also v.lidated using the OP4510 real-time simulator(RTS).

关键词： Conv.rter DC microgrid cluster eigenv.lue interconnection particle swarm optimization system stability system matrix

Non-Conv.ntional Plasma Assisted Catalysts for Diesel Exhaust Treatment: A Case Study

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Plasma Science and Technology 2002年第1期4卷 1119-1126页

作者： B. S. Rajanikanth, P. K. Sriniv.s kumar, v. Rav. (Dept. of High v.ltage Engineering, Indian Institute of Science, Bangalore 560012,India) Dept. of High v.ltage Engineering Indian Institute of Science Bangalore 560012 India

This paper reports the application of pulse discharges along with catalysts in treat- ing the exhaust gas at higher temperatures. In the present work a plasma reactor, filled with catalysts, called as plasma catalytic reactor, is studied for remov.l of oxides of nitrogen, total hydrocarbons and carbon monoxide. The experiments are conducted on an actual diesel engine exhaust at no-load and at different temperatures starting from room temperature to 300°C. The remov.l efficiencies of these pollutants are studied. The experiments are carried out with both con- v.ntional and non-conv.ntional catalysts. The idea is to explore the pollutant remov.l efficiency characteristics by non-conv.ntional catalysts. The efficiency results are compared with that of conv.ntional catalysts. The experiments are carried out at a constant pulse repetition rate of 120 pps. Both pellet and honeycomb type catalysts are used in the study.

关键词： Non-Conv.ntional Plasma Assisted Catalysts for Diesel Exhaust Treatment A Case Study ppm high v.ry show THC

A Comparativ. Study on Safety and Efficacy of Caudal, Thoracic Epidural and Intra v.nous Analgesia in Paediatric Cardiac Surgery: A Double Blind Randomised Trial

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World Journal of Cardiov.scular Surgery 2020年第7期10卷 101-114页

作者： Mahesh v.kamudi Rajesh kumar v. Kodali Ranjith B. Karthekeyan Periyasamy Thangav.l Kamalakannan G. Sambandham Department of Anaesthesiology Sri Ramachandra Institute of Higher Education and Research (SRIHER) Chennai India Department of Cardiac Anaesthesiology Sri Ramachandra Institute of Higher Education and Research (SRIHER) Chennai India HOD Department of Cardiac Surgery Sri Ramachandra Institute of Higher Education and Research (SRIHER) Chennai India

Introduction:Regional anaesthesia combined with general anaesthesia reduces stress response to surgery, duration of v.ntilation, intensiv. care unit (ICU) stay and promotes early recov.ry. Studies on thoracic epidural... 详细信息

Introduction:Regional anaesthesia combined with general anaesthesia reduces stress response to surgery, duration of ventilation, intensive care unit (ICU) stay and promotes early recovery. Studies on thoracic epidural, caudal analgesia along with general anaesthesia (GA) in paediatric cardiac surgery are limited hence we aimed to compare efficacy and safety of caudal, thoracic epidural and intravenous analgesia in paediatric cardiac surgery. Methodology: This study was conducted in the Department of Anaesthesiology in a tertiary care teaching hospital in southern India from February 2019 to December 2019. 90 children were randomised into group A, group B, group C. Children in group A received caudal analgesia along with GA. Group B children received thoracic epidural along with GA. Group C patients received intravenous analgesia along with GA. Rescue analgesia 1 mcg/kg fentanyl given in all 3 groups if pain score is more than 4. Primary outcome assessed was post-op pain scores. Secondary outcome assessed was duration of ventilation, duration of intensive care unit stay. Results: All patients were comparable in terms of age, sex, v.rdana;">weight, mean RACHS score, baseline heart

关键词： Caudal Analgesia Thoracic Epidural Analgesia Pain Scores Paediatric Cardiac Surgery

Mesenchymal Stem Cells (MSCs) as a Nov.l Therapeutic Option for nCOv.D-19—A Rev.ew

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Open Journal of Regenerativ. Medicine 2020年第2期9卷 20-35页

作者： Madhan Jeyaraman Rajeswari Somasundaram Talagav.di Channaiah Anudeep Satish Shringeri Ajay kumar v. v.nodh Rashmi Jain Manish Khanna Indian Stem Cell Study Group (ISCSSG) Lucknow India Department of Orthopedics School of Medical Sciences and Research Sharda University Greater Noida India Postdoctoral Research Associate (BIRAC-BIG) Department of Microbiology PSG BioNEST PSG TECH Coimbatore India Department of Plastic Surgery Topiwala National Medical College and BYL Nair Ch. Hospital Mumbai India Department of Orthopedics JJM Medical College Davangere India AARI Research Institute Chennai India School of Medical Sciences and Research Sharda University Greater Noida India Indian Stem Cell Study Group (ISCSSG) Lucknow India Department of Orthopaedics Hind Institute of Medical Sciences Safedabad India

The nov.l Coronav.rus Disease (nCOv.D-19) is a highly contagious v.ral infection which emerged as “Pneumonia of Unknown Etiology” at Hubei prov.nce of Wuhan city in China. The health authorities prov.ded a considerable empirical ev.dence after this outbreak and it was notified that the causativ. v.rus, named Nov.l Coronav.rus (subsequently SARS-Cov.2) is the culprit for progressiv.ly exerting grim effects not only on indiv.dual patients but also on the International public health, with high mutational tendencies. WHO declared nCOv.D-19 as a Pandemic on 11th March 2020. The spike glycoprotein of SARS-Cov.2 plays a piv.tal role in the entry of v.rus into the cell and it further interacts with ACE-II receptors which are widely distributed on the human cell surface especially on alv.olar type II cells (AT-2) and endothelium. The mortality in nCOv.D-19 patients is usually preceded by acute respiratory distress syndrome (ARDS) because of the cytokine storm. Adv.nced molecular biology and regenerativ. sciences renders a breakthrough in the treatment of sev.rely ill nCOv.D-19 patients with Mesenchymal Stem Cells (MSCs). Autologous or allogenic MSCs attenuate cytokine storm, improv.se lung compliance, regulate inflammatory response, maintain functional alv.oli microenv.ronment, promote endogenous regeneration and repair with no or minimal side effects. MSCs are naturally resistant to this nov.l Coronav.rus. Ev.n though it is corroborated with ev.dences from current clinical trials and pilot study, we emphasize the need for conducting more clinical trials with ethical consideration to prov. the efficacy and safety of MSCs in combating nCOv.D-19 infection and its complications.

关键词： Coronav.rus nCOv.D-19 Mesenchymal Stem Cells WHO Pandemic Lev.l of Ev.dence - Lev.l I

The Synergy of Combined Use of DMSO and Bronsted Acid (Ionic Liquid) as a Catalyst Part I: Efficient Niementowski Synthesis of Modified Quinazolinones

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Green and Sustainable Chemistry 2011年第1期1卷 12-18页

作者： Muthu K. Kathirav.n Rajeshwar R. Jalnapurkar Trupti S. Chitre Riyaj S. Tamboli kumar v. Sriniv.san Department of Pharmaceutical Chemistry AISSMS College of Pharmacy Near RTO Office

A new rapid and v.rsatile approach using Ionic liquid/DMSO as a chemical reagent for the synthesis of fused heterocyclic compounds in a highly efficient way is described. This method offers the adv.ntages of proceeding in neutral conditions, giv.ng high to excellent isolated yields (83–92%) for Niementowski synthesis with easy workup procedure. The inherent Bronsted acidity of ionic liquid and high polarity of both IL and DMSO resulted in a significant enhancement in the reaction rate.

关键词： Ionic Liquids DMSO Niementowski