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Valorization of agro-industrial fruit peel waste to fluorescent nanocarbon sensor:Ultrasensitive detection of potentially hazardous tropane alkaloid

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Frontiers of Environmental Science & Engineering 2022年第3期16卷 1-11页

作者： Athiyanam venkatesan Ramya Manoj Balachandran Nanocarbon Research Group Materials Science Research LaboratoryDepartment of Physics and ElectronicsCHRIST(Deemed to be University)Bengaluru-560029KarnatakaIndia

Millions of tonnes of agro-industrial waste are generated each year globally,with the vast majority of it going untreated,underutilized,and disposed of by burning or landfilling,causing severe environmental distress and economic downturn.A practical solution to this global issue is to use green chemistry to convert this waste into value-added ***,in the present study,agro-industrial orange peel waste was valorized into fluorescent nanodiamond-like carbon sensor via a green route involving hydrothermal treatment of microwave carbonized orange peel *** developed sensor,used for the fluorescence detection of potentially hazardous drug atropine sulfate,exhibits unique dual linearity over concentration ranges of 300 nM to 1 M and from 1 M to 10 M,as well as ultra-low sensitivity of 34.42 nM and 356.46 nM,***,the sensor demonstrates excellent reproducibility,high stability,and satisfactory recovery when used to identify and quantify atropine sulfate in biological samples and commercially available pharmaceuticals,indicating promising multidisciplinary applications.

关键词： Agro-industrial waste Orange peel Valorization Nanodiamond-like carbon Atropine sulphate Fluorescence sensing

Characterization and optimization of pulse electrodeposition of Ni/nano-Al_2O_3 composite coatings

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International Journal of Minerals,Metallurgy and Materials 2013年第5期20卷 479-485页

作者： A.Jegan R.venkatesan Department of Mechanical Engineering Sona College of Technology

Nickel/nano-A1203 composite coatings produced by the pulse electrodeposition method and the influence of pulse parameters, i.e., pulse frequency, duty cycle, and current density on the microstructure, hardness, and corrosion resistance, were critically investigated on an AISI 1018 mild steel specimen electroplated in a Watt＇s type bath. The experiments were carried out with different combinations of pulse parameters using Taguchi＇s L27 orthogonal array, and 27 trials were conducted to study the effect of pulse parameters in view to maximize the hardness of the specimen. The assessment results clearly reveal that the specimen exhibits the maximum hardness at the pulse frequency of 20 Hz, duty cycle of 30%, and peak current density of 0.4 A/cm2, which are designated as the optimal parameters herein. Furthermore, the influences of those optimized pulse parameters over the microstructure and corrosion resistance were investigated, and some conclusions were drawn. Also, from the ANOVA examination, it is clear that duty cycle is predominant in affecting the hardness, while current density has relatively low impact.

关键词： composite coatings nickel alumina nanoparticles electrodeposition corrosion resistance hardness

A review on front end conversion in ocean wave energy converters

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Frontiers in Energy 2015年第3期9卷 297-310页

作者： Nagulan SANTHOSH venkatesan BASKARAN Arunachalam AMARKARTHIK Department of Mechanical Engineering Bannari Amman Institute of Technology Sathyamangalam 638401 India

Harvesting the energy from ocean waves is one of the greatest attractions for energy engineers and scientists. Till date, plenty of methods have been adopted to harvest the energy from the ocean waves. However, due to technological and economical complexity, it is intricate to involve the majority of these energy harvesters in the real ocean environment. Effective utilization and sustain- ability of any wave energy harvester depend upon its adaptability in the irregular seasonal waves, situation capability in maximum energy extraction and finally fulfilling the economic barriers. In this paper, the front end energy conversions are reviewed in detail which is positioned in the first stage of the wave energy converter among other stages such as power take off （PTO） and electrical energy conversion. If the recent development of these front end energy conversion is well known then developing wave energy converter with economic and commercial viability is possible. The aim of this review is to provide information on front end energy conversion of a point absorber and emphasize the strategies and calamity to be considered in designing such kinds of devices to improve the energy harvesting competence. This will be useful to the engineers for speeding up the development of a matured point absorbing type wave energy converter.

关键词： wave energy converter point absorbers,power take off (PTO) front end energy conversion

Chemical composition and anti-inflammatory activity of Boswellia ovalifoliolata essential oils from leaf and bark

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Journal of Forestry Research 2018年第2期29卷 370-378页

作者： venkatesan Geetha Sarada Nallani Chakravarthula Department of Chemistry School of Advanced SciencesVIT University

We isolated the essential oils from Boswellia ovalifoliolata *** and *** using hydrodistillation,identified the obtained compounds using gas chromatography–mass spectrometry(GC–MS) and Fourier transform-infrared spectroscopy(FT-IR),and studied the photophysical and electrochemical properties using UV–visible and fluorescence spectroscopy and cyclic *** the basis of GC–MS spectra,38 compounds were identified in the essential oil from leaves and 26 in the oil from *** bark oil contained 13.44% b-Farnesene(sesquiterpene),10.45% caryophyllene oxide(sesquiterpene) and 6.6% spathulenol,(2 Z,6 E)-(sesquiterpene alcohol); the leaf oil contained 11.1% spathulenol(sesquiterpene alcohol),9.0% caryophyllene oxide(sesquiterpenoids) and 6.3% decyl acetate(ester).FT-IR spectra confirmed the presence of aliphatic aldehydes and ketones,carboxylic acid,alcohols,esters and ethers in both oil ***–visible absorption spectra showed maximum absorbance at 245,290 and 402 nm for bark oil,and 250,285 and 325 nm for *** oil showed strong emission with maximum emission wavelength at 456 nm was higher than that of leaf oil at 414 *** essential oil had significant anti-inflammatory activity,and the reduction potential of the leaf oil was-0.44 and-0.56 e V for bark.

关键词： Essential oil Boswellia ovalifoliolata Gas chromatography–mass spectrometry Fourier transforminfrared spectroscopy Cyclic voltammetry fluorescence spectroscopy

Single-phase Thirteen-level Dual-boost Inverter Based Shunt Active Power Filter Control Using Resonant and Fuzzy Logic Controllers

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CSEE Journal of Power and Energy Systems 2022年第3期8卷 849-863页

作者： Shaik Gouse Basha venkatesan Mani Subbarao Mopidevi Vignan's Foundation for Science Technology and Research Andhra Pradesh522213India Vignan's Lara Institute of Technology and Science Vadlamudi522213India

This paper addresses the power quality improvement of a single-phase utility grid using a thirteen-level dualboost inverter(TLDBI)-shunt active filter(SAF).The TLDBI uses a single DC source of low voltage magnitude and five switched capacitor arrangement to achieve self-balanced thirteen level output ***,the charging and voltage balancing of the capacitor is achieved by proper switching sequence control in a series,through which boosted inverter output voltage levels are *** with the tradional H-bridge multilevel inverters(MLIs),all the elements in the proposed TLDBI are able to withstand a voltage stress which is equal to the input DC *** feature ensures the performance of the proposed TLDBI in high-frequency *** power at the electrical grid is highly affected by a wide range of non-linear *** proposed SAF is used for measuring and controlling the current flow from source to *** difference between the targeted and actual currents from the utility grid is measured by using the modified synchronous reference frame(SRF)*** estimated error current is used by the controllers to predict the optimum suitable switching angle and modulation index(MI)to the *** this paper,the traditional proportional-integral(PI)controller,fuzzy logic controller(FLC)and proportional resonant controller(PRC)are compared and the results are presented to validate the performance of *** stability and robustness of the proposed controller is evaluated using Bode,Root locus,and Nyquist *** modeling and analysis of the proposed system are done using MATLAB/Simulink *** simulation results are presented in the various MI of TLDBI and also subjected to non-linear load *** results are also compared to the claim novelty of the proposed study.

关键词： FLC power quality PRC thirteen-level DBI shunt active filter single-phase utility grid SRF

Optimal Scheduling of Air Conditioners for Energy Efficiency

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Journal of Electronic Science and Technology 2018年第2期16卷 110-122页

作者： K.venkatesan Uppu Ramachandraiah Bharat Sanchar Nigam Limited Chennai Telephones Chennai 600010 the Department of Electronics and Instrumentation Engineering Hindustan Institute of Science and TechnologyChennai 603103

Energy saving is one of the most important research hotspots, by which operational expenditure and CO2 emission can be reduced. Optimal cooling capacity scheduling in addition to temperature control can improve energy efficiency. The main contribution of this work is modeling the telecommunication building for the fabric cooling load to schedule the operation of air conditioners. The time series data of the fabric cooling load of the building envelope is taken by simulation by using Energy Plus, Building Control Virtual Test Bed （BCVTB）, and Matlab. This pre-computed data and other internal thermal loads are used for scheduling in air conditioners. Energy savings obtained for the whole year are about 4% to 6% by simulation and the field study, respectively.

关键词： Building fabric cooling load energy balanced air conditioning energy efficiency scheduling of air conditioners

Neuritogenic function of microglia in maternal immune activation and autism spectrum disorders

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Neural Regeneration Research 2021年第7期16卷 1436-1437页

作者： Srinidhi venkatesan Kalavai Seiko Ikezu Department of Pharmacology&Experimental Therapeutics Boston University School of MedicineBostonMAUSA

Autism spectrum disorder and maternal immune activation: Environmental factors during pregnancy, such as infections, maternal stress or autoimmune disorders, are closely associated with the prevalence of neurodevelopmental disorders including autism spectrum disorder(ASD), bipolar disorder and *** has been shown that severe infections during pregnancy cause maternal immune activation(MIA) and significantly increase the risk of ASD in the offspring although the mechanisms are poorly *** rodent MIA studies support this causal link by showing that offspring of dams administered with polyinosinic:polycytidylic acid(poly I:C), a viral mimetic Toll-like receptor 3 agonist, exhibit longlasting ASD-like behavioral abnormalities such as increased repetitive behavior, impaired social interaction and ***, MIA alters inflammatory cytokine expressions persisting through development and adulthood in the brain of the offspring, suggesting that chronic neuroimmune dysfunction plays a role in mediating the deleterious effects of MIA on neurodevelopment(Garay et al., 2013).

关键词： disorders impaired activation

Air-stable,all-dry transferred ReS_(2)/GaSe heterostructure-based NO_(2)gas sensor

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Journal of Materials Science & Technology 2024年第1期168卷 79-87页

作者： A.venkatesan Hyeyoon Ryu Anupom Devnath Hyungyu Yoo Seunghyun Lee Department of Electronic Engineering Kyung Hee UniversityYongin-Si 17104South Korea Department of Electronics and Information Convergence Engineering Kyung Hee UniversityYongin-Si 17104South Korea

Two-dimensional(2D)materials have gained considerable attention in chemical sensing owing to their naturally high surface-to-volume ***,the poor response time and incomplete recovery re-strict their application in practical,high performance gas *** this work,we fabricated air-stable ReS_(2)/GaSe heterostructure-based NO_(2)gas sensors with excellent gas sensing response,recovery,selectiv-ity and a low limit of detection(LOD)toward nitrogen dioxide(NO_(2)).The ReS_(2)/GaSe heterostructure was prepared via mechanical exfoliation and an all-dry transfer *** the sensing measurements,temperature-dependant transport measurements were carried *** Schottky Barrier Height(SBH)of the ReS_(2)/GaSe heterostructure was calculated and the corresponding transport mechanisms were *** fabricated gas sensors showed a significant response enhancement with full reversibility to-ward ppm-level NO_(2)(response of∼17%at 3 ppm,a LOD of∼556 ppb)at an operating temperature of(33°C).In particular,the total response and recovery time of the ReS_(2)/GaSe was revealed to be less than 4 min(∼38 s and∼174 s,respectively)for the 250 ppm concentration,which is one of the best response and recovery time toward ppm-level NO_(2).The excellent sensing performances and recovery characteris-tics of the ReS_(2)/GaSe structure are attributed to its efficient charge separation,unique interlayer coupling and desirable band *** atomically thin,ultrasensitive gas sensor that operates at room tem-perature is a strong technological contender to conventional metal oxide gas sensors,which often require elevated temperatures.

关键词： 2D materials All-dry transfer Gas sensor Van der Waals heterostructure ReS_(2)/GaSe Gas sensing response Transition metal dichalcogenide

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