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International Journal of Organic Chemistry 2015年第4期5卷 271-281页

作者： thangavelu saravanan Anju Chadha Tarur Konikkaledom Dinesh Namasivayam Palani Sengottuvelan Balasubramanian Laboratory of Bioorganic Chemistry Department of Biotechnology Indian Institute of Technology Madras Chennai India National Center for Catalysis Research Indian Institute of Technology Madras Chennai India Department of Inorganic Chemistry University of Madras Guindy Campus Chennai India ITC Life Sciences and Technology Centre ITC Limited Peenya Industrial Area Phase I Bangalore India

Enantiomerically enriched (R)-1-(2-bromocycloalkenyl)-3-buten-1-ol and its derivatives were obtained via enantioselective hydrolysis [resolution] with good enantioselectivities (E = 31 to >500) using Candida parapsilosis ATCC 7330. The various reaction parameters were optimized for enantioselective hydrolysis to achieve high enantiomeric excess (ee) and conversions. Among the substrates tested, (RS)-1-(2-bromocyclohex-1-en-1-yl) but-3-yn-1-yl acetate was hydrolysed by the biocatalyst in 12 h to the corresponding (R)-alcohol in 49% conversion and >99 ee. The optically pure allylic alcohol thus obtained was used as a chiral starting material for the synthesis of an enantiomerically enriched bicyclic alcohol effectively establishing achemoenzymatic route.

关键词： Chemoenzymatic Synthesis Enantioselective Hydrolysis Candida parapsilosis ATCC 7330 Hydrolases Bicyclic Carbocycle

Beyond fossil:the synthetic fuel surge for a green-energy resurgence

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Clean Energy 2024年第5期8卷 1-18页

作者： Sreejaun Thothaathiri Janaki Dinesh Kumar Madheswaran G.Naresh thangavelu Praveenkumar Electric Vehicle Technology Laboratory Department of Automobile EngineeringSRM Institute of Science and TechnologyKattankulathur CampusTamilnadu 603203India

This review offers a comprehensive overview of synthetic fuels as promising alternatives to conventional fossil *** carbon-neutral potential of synthetic fuels when produced using renewable energy and captured CO_(2),offering significant opportunities to mitigate CO_(2) emissions,is ***,the efficiency of synthetic fuels is presented,as they do not require dedicated agricultural land or substantial water resources,addressing concerns related to the land-use change and water scarcity associated with traditional *** economic viability of synthetic fuels is explored,highlighting the advancements in technology and decreased renewable-energy costs,coupled with their independence from food crops,mitigating concerns about potential impacts on food *** investments by industry leaders such as Porsche,Highly Innovative Fuels Global,and ExxonMobil,totalling$1 billion,aimed at achieving an annual production of 550 million litres by 2026,are covered in *** study is further extended by emphasizing the scalability of synthetic fuel production through modular processes,enabling tailored facilities to meet regional demands and contribute to a decentralized and resilient energy ***,the‘drop-in’nature of synthetic fuels that are seamlessly compatible with existing fuel storage,pipelines,and pumps,facilitating a smooth transition without requiring extensive infrastructure changes,is *** such as the current high cost of synthetic fuel production are acknow-ledged,necessitating supportive government policies and incentives for widespread ***,synthetic fuels have emerged as promising contenders in the pursuit of sustainable and adaptable energy solutions,with tangible benefits for the environment,economy,and existing energy infrastructure.

关键词： synthetic fuels biofuels carbon neutrality sustainable energy e-fuel ‘drop-in’nature

Container Based Nomadic Vehicular Cloud Using Cell Transmission Model

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Computer Systems Science & Engineering 2023年第1期44卷 423-440页

作者： Devakirubai Navulkumar Menakadevi thangavelu Department of Computer Science and Engineering Jayam College of Engineering and TechnologyDharmapuri636813India Department of Electronics and Communication Engineering Adhiyaman College of EngineeringHosur635109India

Nomadic Vehicular Cloud(NVC)is envisaged in this *** predo-minant aspects of NVC is,it moves along with the vehicle that initiates it and functions only with the resources of moving vehicles on the heavy traffic road without relying on any of the static infrastructure and NVC decides the initiation time of container migration using cell transmission model(CTM).Containers are used in the place of Virtual Machines(VM),as containers’features are very apt to NVC’s dynamic *** specifications of 5G NR V2X PC5 interface are applied to NVC,for the feature of not relying on the network ***-days,the peak traffic on the road and the bottlenecks due to it are inevitable,which are seen here as the benefits for VC in terms of resource availability and residual in-network *** speed range of high-end vehicles poses the issue of dis-connectivity among VC participants,that results the container migration *** the entire VC participants are on the move,to maintain proximity of the containers hosted by them,estimating their movements plays a vital *** infer the vehicle movements on the road stretch and initiate the container migration prior enough to avoid the migration failure due to vehicles dynamicity,this paper proposes to apply the CTM to the container based and 5G NR V2X enabled *** simulation results show that there is a significant increase in the success rate of vehicular cloud in terms of successful container migrations.

关键词： Vehicular cloud container migration cell transmission model 5G NR V2X PC5 interface

Ontology Based Ocean Knowledge Representation for Semantic Information Retrieval

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Computers, Materials & Continua 2022年第3期70卷 4707-4724页

作者： Anitha Velu Menakadevi thangavelu Department of Electronics and Communication Engineering Adhiyamaan College of EngineeringHosur635109Tamil NaduIndia

The drastic growth of coastal observation sensors results in copious data that provide weather *** intricacies in sensor-generated big data are heterogeneity and interpretation,driving high-end Information Retrieval(IR)*** Semantic Web(SW)can solve this issue by integrating data into a single platform for information exchange and knowledge *** paper focuses on exploiting the SWbase systemto provide interoperability through ontologies by combining the data concepts with ontology *** paper presents a 4-phase weather data model:data processing,ontology creation,SW processing,and query *** developed Oceanographic Weather Ontology helps to enhance data analysis,discovery,IR,and decision *** addition to that,it also evaluates the developed ontology with other state-of-the-art *** proposed ontology’s quality has improved by 39.28%in terms of completeness,and structural complexity has decreased by 45.29%,11%and 37.7%in Precision and *** Meteorological Satellite INSAT-3D’s ocean data is a typical example of testing the proposed *** experimental result shows the effectiveness of the proposed data model and its advantages in machine understanding and IR.

关键词： Heterogeneous climatic data information retrieval semantic web sensor observation services knowledge representation ontology

Coinoculation of bioinoculants improve Acacia auriculiformis seedling growth and quality in a tropical Alfisol soil

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Journal of Forestry Research 2018年第3期29卷 660-670页

作者： thangavelu Muthukumar Karuthamuthu Udaiyan Root and Soil Biology Laboratory Department of BotanyBharathiar University

We conducted a study to find out if arbuscular mycorrhizal(AM) fungi(Acaulospora scrobiculata,Scutellospora calospora) and phosphate solubilizing bacteria(PSB, Paenibacillus polymyxa) inoculation either individually or in combinations can improve Acacia auriculiformis seedling growth, uptake of nutrients and quality in a phosphorus deficient tropical Alfisol. The seedlings were assessed for various growth and nutrient uptake parameters after 60 days of treatment. Inoculation with *** stimulated mycorrhizal formation. Seedling height, stem girth, taproot length, number of leaves and leaf area, plant dry matter production, nodulation, and nodular dry weight were significantly higher for seedlings that were either dual inoculated or triple inoculated compared to individual inoculation of AM fungi or PSB, and uninoculated seedlings. Dual and triple application of AM fungi and PSB also significantly improved the nutrient contents of shoots and roots and nutrient uptake efficiencies. The calculated seedling quality indexes of the AM fungi and PSB inoculated seedling were 25–208% higher than uninoculated seedlings. These findings show that *** seedlings when dual inoculated or triple inoculated performed better than seedlings inoculated with the microbes individually and compared with uninoculated control seedlings. We conclude that bioinoculation is important for the production of high-quality *** seedlings in tree nurseries for planting in nutrient deficient soils.

关键词： Arbuscular mycorrhizal fungi Nutrient uptake efficiency Paenibacillus polymyxa Relative field mycorrhizal dependency Seedling quality

An Adaptive Power Allocation Scheme for Performance Improvement of Cooperative SWIPT NOMA Wireless Networks

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Computers, Materials & Continua 2020年第5期63卷 1043-1064页

作者： Manimekalai Thirunavukkarasu Romera Joan Sparjan Laxmikandan thangavelu College of Engineering Guindy Anna UniversityChennai600025India

Future wireless networks demand high spectral efficiency,energy efficiency and *** non-orthogonal multiple access(NOMA)with simultaneous wireless information and power transfer(SWIPT)is considered as one of the novel techniques to meet this *** this work,an adaptive power allocation scheme called SWIPT based adaptive power allocation(SWIPT-APA-NOMA)is proposed for a power domain NOMA *** proposed scheme considers the receiver sensitivity of the end users while calculating the power allocation coefficients in order to prevent wastage of power allocated to user in outage and by offering priority to any one of the users to use maximum harvested power.A detailed analysis on the bit error rate(BER)performance of the proposed scheme is done and closed form expression is *** have been carried out with various parameters that influence the receiver sensitivity and the results show that the network achieves better outage and BER performance using the proposed *** is found that the proposed scheme leads to a ten-fold decrease in transmit power for the same error performance of a fixed power allocation ***,it offers 96.06%improvement in the capacity for a cumulative noise figure and fading margin of 10 dB.

关键词： NOMA SWIPT cooperative relaying adaptive power allocation

Combined Economic and Emission Power Dispatch Control Using Substantial Augmented Transformative Algorithm

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Intelligent Automation & Soft Computing 2023年第1期35卷 431-447页

作者： T.R.Manikandan Venkatesan thangavelu Department of Electrical and Electronics Engineering K.S.Rangasamy College of TechnologyTiruchengode637215TamilnaduIndia

The purpose of the Combined Economic Emission Dispatch(CEED)of electric power is to offer the most exceptional schedule for production units,which must run with both low fuel costs and emission levels concurrently,thereby meeting the lack of system equality and inequality *** and emissions dispatching has become a primary and significant concern in power system *** of using non-renewable fuels as input to exhaust power systems with toxic gas emissions and depleted resources for future *** optimal power allocation to generators serves as a solution to this *** dispatch reduces emissions while ignoring economic considerations.A collective strategy known as Combined Economic and Emission Dispatch is utilized to resolve the above-mentioned problems and investigate the trade-off relationship between fuel cost and ***,this work manages the Substantial Augmented Transformative Algorithm(SATA)to take care of the Combined Economic Emission Dispatch Problem(CEEDP)of warm units while fulfilling imperatives,for example,confines on generator limit,diminish the fuel cost,lessen the emission and decrease the force *** is a stochastic streamlining process that relies upon the development and knowledge of *** goal is to minimize the total fuel cost of fossil-based thermal power generation units that generate and cause environmental *** algorithm searches for solutions in the search space from the smallest to the largest in the case of forwarding *** simulation of the proposed system is developed using MATLAB Simulink *** results show the effectiveness and practicability of this method in terms of economic and emission dispatching *** performance of the proposed system is compared with existing Artificial Bee Colony-Particle Swarm Optimization(ABC-PSO),Simulated Annealing(SA),and Differential Evolution(DE)*** fuel cost and gas emission of t

关键词： Economic emission dispatch fuel cost substantial augmented transformative algorithm

Evaluation of Medium Components by Plackett-Burman Statistical Design for Lipase Production by Candida rugosa and Kinetic Modeling

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生物工程学报 2008年第3期24卷 436-444页

作者： Aravindan Rajendran Anbumathi Palanisamy Viruthagiri thangavelu Biochemical Engineering Laboratory Department of Chemical Engineering Annamalai University Annamalai nagar-608 002 Tamil Nadu India

Lipase production by Candida rugosa was carried out in submerged ***-Burman statisticalexperimental design was applied to evaluate the fermentation medium *** effect of twelve medium components was studied in sixteen experimental ***,olive oil,peptone and FeCl3·6H2O were found to have more significance on lipase production by Candida *** lipase activity of 3.8 u mL-1 was obtained at 50h of fermentation *** fermentation was carried out at optimized temperature of 3℃,initial pH of 6.8 and shaking speed of 120 r/*** kinetic models were used to simulate the experimental *** model,Luedeking-Piret model and modified Luedeking-Piret model were found suitable to efficiently predict the cell mass,lipase production and glucose consumption respectively with high determination coefficient(R2).From the estimated values of the Luedeking-Piret kinetic model parameters,α and β,it was found that the lipase production by Candida rugosa is growth associated.

关键词：脂肪酶假丝酵母动力学模型培养基深层发酵

Characterization of Intracellular Gold Nanoparticles Synthesized by Biomass of Aspergillus terreus

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Acta Metallurgica Sinica(English Letters) 2014年第4期27卷 569-572页

作者： Baskar Gurunathan Pranav Vasanthi Bathrinarayanan Vasanth Kumar Muthukumarasamy Dilliganesh thangavelu Department of Biotechnology St.Joseph’s College of EngineeringChennai 600 119India

Greener synthesis of nanoparticle is a revolutionizing area in research *** method of reduction of metal ions is often preferred because they are clean,safe,biocompatible,and environmentally acceptable than physical,chemical,and mechanical *** wet biomass of Aspergillus terreus（***） was utilized for the intracellular synthesis of gold *** nanoparticles were produced when an aqueous solution of chloroauric acid was reduced by *** biomass as the reducing *** of gold nanoparticles was confirmed by the color change of biomass from yellow to pinkish *** produced nanoparticles were then characterized by FT-IR,SEM,EDS,and *** SEM images revealed that the nanoparticles were spherical,irregularly shaped with no definite *** size of the biosynthesized gold nanoparticles was 186 *** presence of the gold nanoparticle was confirmed by EDS *** nature of synthesized gold nanoparticle was confirmed by XRD pattern.

关键词： Gold nanoparticles Biosynthesis Characterization Scanning electron microscope Energy dispersive spectroscopy

Web-based remote sensing image retrieval using multiscale and multidirectional analysis based on Contourlet and Haralick texture features

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International Journal of Intelligent Computing and Cybernetics 2021年第4期14卷 533-549页

作者： Rajakumar Krishnan Arunkumar thangavelu P.Prabhavathy Devulapalli Sudheer Deepak Putrevu Arundhati Misra School of Computer Science and Engineering Vellore Institute of TechnologyVelloreIndia School of Information Technology and Engineering Vellore Institute of TechnologyVelloreIndia School of Computer Science and Engineering Vellore Institute of TechnologyVelloreIndiaand Space Applications Centre AhmedabadIndia

Purpose-Extracting suitable features to represent an image based on its content is a very tedious *** in remote sensing we have high-resolution images with a variety of objects on the Earth’s *** distance metric is used to measure the similarity between query and database *** low distance obtained image is indexed at the top as high relevant information to the ***/methodology/approach-This paper aims to develop an automatic feature extraction system for remote sensing image *** texture features based on Contourlet transform are fused with statistical features extracted from the QuadTree(QT)decomposition are developed as feature set to represent the input *** extracted features will retrieve similar images from the large image datasets using an image-based query through the web-based user ***-The developed retrieval system performance has been analyzed using precision and recall and F1 *** proposed feature vector gives better performance with 0.69 precision for the top 50 relevant retrieved results over other existing multiscale-based feature extraction ***/value-The main contribution of this paper is developing a texture feature vector in a multiscale domain by combining the Haralick texture properties in the Contourlet domain and Statistical features using QT *** features required to represent the image is 207 which is very less dimension compare to other texture *** performance shows superior than the other state of art methods.

关键词： Image retrieval Remote sensing Contourlet Texture features Web-based search CBIR Multiscale texture