Two-dimensional Ti3C2Tx MXenes as a catalyst support for the synthesis of 1,4-disubstituted-1,2,3-triazoles via azide-nitroalkene oxidative cycloaddition
1,2,3-triazoles; Cycloaddition; MXenes; Ti3C2Tx; Two-dimensional
Two-dimensional transition metal carbides/nitrides: MXenes have become a prime choice for researchers to exploit their outstanding properties for various applications in different fields majorly including energy, health and environment. Interestingly, there are no reports of utilizing 2D materials especially MXenes as a catalyst support for organic transformations. In the present study, we have utilized 2D Ti3C2Tx MXenes as a catalyst support for the synthesis of 1,4-disubstituted-1,2,3-triazoles via azide-nitroalkene cycloaddition for the first time. Reusability of Ti3C2Tx MXene catalyst up to five cycles without the loss of catalytic activity with appreciable yields of the product is the noteworthy feature of the present protocol. The synthesized 1,2,3-triazole derivatives possessing long alkyl chain upto fourteen carbon atoms on terminal nitrogen in triazole ring could become a good precursors to give a liquid crystalline properties beyond its biological properties. Nontoxic catalyst, catalyst reusability, broad substrate scope, and good yield are some of the salient features of the present protocol. 2023 Elsevier B.V.
Verma S.K.; Verma R.; Girish Y.R.; Verma S.; Pramoda K.; Vaishnav Y.; Saji J.; Kumar K.S.S.
Journal of Molecular Structure, Vol-1281
https://doi.org/10.1016/j.molstruc.2023.135145 https://www.scopus.com/inward/record.uri?eid=2-s2.0-85148545324&doi=10.1016%2fj.molstruc.2023.135145&partnerID=40&md5=e8ddc096ed29ad0e284ec0f189c86a3b
Verma S.K., School of Chemistry and Chemical Engineering, Yulin University, Yulin, 719000, China, Shaanxi Key Laboratory of Low Metamorphic Coal Clean Utilization, Yulin University, Yulin, 719000, China; Verma R., School of Chemistry and Chemical Engineering, Yulin University, Yulin, 719000, China, Shaanxi Key Laboratory of Low Metamorphic Coal Clean Utilization, Yulin University, Yulin, 719000, China; Girish Y.R., Centre for Research & Innovations, BGSIT, Adichunchanagiri University, B.G. Nagara, Mandya District, Karnataka, 571448, India; Verma S., University college of Pharmacy Raipur, Pt. Deendayal Upadhyay Memorial Health, Sciences and Aayush University of Chhattisgarh, Chhattisgarh, Raipur, 492010, India; Pramoda K., Centre for Nano and Material Sciences, Jain University, Jain Global Campus, Bangalore-, Ramanagaram, 562112, India; Vaishnav Y., Faculty of Pharmaceutical Sciences, Shri Shankaracharya Techincal Campus, Chattisgarh, Junwani Bhilai, 491001, India; Saji J., Department of Sciences and Humanities, School of Engineering and Technology, CHRIST (Deemed to be university), Bangalore, 560029, India; Kumar K.S.S., Department of Studies in Chemistry, University of Mysore, Manasagangotri, Mysuru, 570 006, India
Viologen appended Schiff base polymer and its symmetrical supercapacitor device performance
Pseudocapacitive behaviour; Schiff base polymer; Specific capacitance; Symmetrical supercapacitor device; Viologen polymer
A new hyperbranched viologen containing Schiff base polymer (VSBP) is synthesized by condensing TRIPOD and VDA. The polymer is characterized using spectroscopic techniques (FT-IR & 13C NMR) and microscopic (SEM) analyses. The VSBP modified NF electrode renders an effectual electrochemical performance with maximum specific capacitance of 256 F/g at 0.5 A/g. From cyclic stability measurement, 87% capacitance retention is retained at 10 A/g and 95% achieved at 0.5 A/g after 3000 GCD cycles in a three-electrode system. Assembling of VSBP modified NF electrode as a symmetrical supercapacitor device exhibits a high energy density value of 17.02 Wh/kg with a power density of 816 W/kg and acceptable capacitance retention is achieved 90.6% at 1 A/g current density after 5000 cycles. 2023 Elsevier Ltd
Saravanan C.; Muthuraja P.; Kanagaraj M.; Kathiresan M.; Velu K.S.; Bhargav P.B.; Kandasamy K.; Muthu Mareeswaran P.
https://doi.org/10.1016/j.mtcomm.2023.105832 https://www.scopus.com/inward/record.uri?eid=2-s2.0-85151038486&doi=10.1016%2fj.mtcomm.2023.105832&partnerID=40&md5=96332e416d6faabf83851c0775f35397
Saravanan C., Department of Industrial Chemistry, Alagappa University, Tamil Nadu, Karaikudi, India, SSN Research Centre, Sri Sivasubramaniya Nadar College of Engineering, Tamil Nadu, Kalavakkam, India, Department of Chemistry, CHRIST (Deemed to be University), Karnataka, Bangalore, 560029, India; Muthuraja P., School of Chemical Engineering, Yeungnam University, Gyeongsan, 38541, South Korea; Kanagaraj M., Electro Organic and Materials Electrochemistry Division, CSIR-Central Electrochemical Research Institute, Tamil Nadu, Karaikudi, 630003, India; Kathiresan M., Electro Organic and Materials Electrochemistry Division, CSIR-Central Electrochemical Research Institute, Tamil Nadu, Karaikudi, 630003, India; Velu K.S., SSN Research Centre, Sri Sivasubramaniya Nadar College of Engineering, Tamil Nadu, Kalavakkam, India; Bhargav P.B., SSN Research Centre, Sri Sivasubramaniya Nadar College of Engineering, Tamil Nadu, Kalavakkam, India; Kandasamy K., Department of Chemistry, Velammal College of Engineering and Technology, Tamilnadu, Madurai, 625009, India; Muthu Mareeswaran P., Department of Industrial Chemistry, Alagappa University, Tamil Nadu, Karaikudi, India, Department of Oceanography and Coastal Area Studies, Thondi Campus, Alagappa University, Tamil Nadu, Karaikudi, India
Food and communities in post-COVID-19 cities: Case of India
Covid-19; Entitlement; Informality and food insecurity; Urbanization
While Covid-19 pandemic has affected countries across the world, the burden has been shared disproportionately by urban poor from the cities in Global South. In much of Global South, while cities have emerged as growth centers, they are mostly driven by informalities, belying the image of cities, visualized in the mainstream development economics literature as a place of secured formal jobs that free one from the drudgery of rural life. Covid-19 pandemic has exposed these fault-lines in the cities. India serves as a typical case of such urban-centric growth, with informal workers, predominated by disadvantaged social and religious categories, accounting for 81% of workers in urban space. In cities, migrant in general and seasonal migrants increasingly account for bulk of informal workforce. The lockdown imposed in the wake of Covid-19 pandemic left the community of households reliant on informal works for livelihoods, without any rights and entitlements, which affect their access to food. The review of evidence collected in both primary surveys and macro level data points towards sluggishness in recovery of jobs, which coupled with high food inflation, suggests that access to food continues to be an issue in urban governance. The paper calls for a roadmap entailing both short-term and long-term measures to build sustainable urban livelihoods for ensuring food secure urban space in India. 2023 The Author(s)
Urban Governance, Vol-3, No. 2, pp. 97-105.
https://doi.org/10.1016/j.ugj.2023.03.002 https://www.scopus.com/inward/record.uri?eid=2-s2.0-85171395772&doi=10.1016%2fj.ugj.2023.03.002&partnerID=40&md5=d8afe4d7f91f5278b1e6554f08228c15
Varma S., Department of Economics, Christ (Deemed to be University), Karnataka, Bangalore, India, Kerala Council for Historical Research (KCHR), Kerala, Thiruvananthapuram, India; Sutradhar R., Department of Economics, Christ (Deemed to be University), Karnataka, Bangalore, India
Social Media Dependency and Facebook Usage among the Older Adults of Kerala
Facebook intensity; older adults; social media dependency; well-being
Social media has become an integral part of modern society, with people of all ages using various platforms to connect, share information, and stay up-to-date on current events. However, there has been a recent trend of increased Facebook usage among older adults, which has raised concerns about social media dependency. The current study explores the trends in social media dependency and Facebook intensity among older adults of Kerala. The present study employed a quantitative research design and the sample consisted of 416 older adults, aged above 60 years. Two scales were used to collect data: the Social Media Dependency Scale (SMDS) and the Facebook Intensity Measure (FBI). Frequency and percentage analysis, Spearman's Rho, Kruskal-Wallis H test, and Mann-Whitney U test were carried out using SPSS (Version 23) for deriving results. Those individuals who are more dependent on social media are also more likely to engage in high levels of Facebook activity. A good majority of the participants were found to be using social media and Facebook for more than 3 hours in a day and having more than 400 friends. Social media dependency and Facebook intensity were reported to be high in urban localities, South Kerala having significantly higher rates of social media dependency when compared to North and Central regions. Social media dependency was found to be high among males, whereas no difference was in Facebook intensity among male and females. Implications: Given the importance of social connections for the well-being of older adults, it is critical to understand the impact of social media use on their lives and develop strategies to promote healthy social media behaviour. 2023 Redfame Publishing Inc.. All Rights Reserved.
Menon V.A.; Prasad A.; Puthur L.A.; Soman K.K.; Joseph L.
Studies in Media and Communication, Vol-11, No. 4, pp. 202-208.
https://doi.org/10.11114/smc.v11i4.6060 https://www.scopus.com/inward/record.uri?eid=2-s2.0-85162086575&doi=10.11114%2fsmc.v11i4.6060&partnerID=40&md5=87b3809afaadc66cb1461d20b70fc045
Menon V.A., Department of Media Studies, Kristu Jayanti College (Autonomous), Bangalore, 560067, India; Prasad A., Niyama Digital Healthcare Private Limited, Chennai, India; Puthur L.A., Department of Media Studies, Christ (Deemed to be University), Bengaluru, 560029, India; Soman K.K., Department of Education, School of Education & Training, Central University of Tamil Nadu, Tamil Nadu, Thiruvarur, 610005, India; Joseph L., Department of Commerce, St Joseph University, Bengaluru, 560027, India
Thermorheological effect on RayleighBard magnetoconvection in a biviscous Bingham fluid with rough boundary condition on velocity and Robin boundary condition on temperature
biviscous Bingham fluid; energy method; general boundary condition; nonlinear analysis; variable viscosity
The thermorheological effect on the onset of RayleighBard convection in a biviscous Bingham fluid in the presence of a horizontal magnetic field is investigated considering rough boundary conditions on velocity and Robin boundary conditions on temperature. The viscosity of the electrically conducting fluid is assumed to be sensitive to temperature variation. Linear and global nonlinear stability analyses are performed using the Chebyshev pseudospectral method to determine the existence of instability or otherwise. A general interpretation is made from the results to show the effects of the magnetic field and the variable viscosity on the system's stability. The biviscous Bingham parameter and the Chandrasekhar number are shown to have a delay in the onset of convection, while the effect of temperature sensitivity is to advance the onset. It is found that the results of linear and global nonlinear stability are not in agreement, so the region of subcritical instability exists. Also, the results obtained for RayleighBard convection agree pretty well with those of Platten and Legros and Siddheshwar et al. for the limiting cases. 2023 Wiley Periodicals LLC.
Heat Transfer, Vol-52, No. 4, pp. 2943-2974.
https://doi.org/10.1002/htj.22812 https://www.scopus.com/inward/record.uri?eid=2-s2.0-85145451671&doi=10.1002%2fhtj.22812&partnerID=40&md5=833fd410a386a8266533d7bd222c84a6
Nandal R., Department of Mathematics, Centre for Mathematical Needs, Christ (Deemed to be University), Bengaluru, India; Siddheshwar P.G., Department of Mathematics, Centre for Mathematical Needs, Christ (Deemed to be University), Bengaluru, India
Characteristics of chitin extracted from different growth phases of black soldier fly, Hermetia illucens, fed with different organic wastes
Chitin; Insect; Waste management; Wound healing
Insect chitin was isolated from different life stages of the black soldier fly Hermetia illucens, such as instar stages, prepupae and pupae, reared separately on fruit and vegetable waste substrates after removal of fat, protein and minerals. Chitin yield was high in prepupae fed with vegetable waste (11.78 0.13%) followed by fruit waste (6.82 0.36%). The extracted chitin was compared with a commercial chitin from shrimp by Fourier-transform infrared spectroscopy, X-ray diffraction, scanning electron microscopy and thermogravimetric analysis. The results revealed that both chitins from commercial shrimp source and the H. illucens had similar chemical structures and physicochemical properties indicating the H. illucens chitin samples to be of ?- chitin orientation type. With regards to the H. illucens samples, small physiochemical changes were noticed. Furthermore, the polymers derived from BSF are equivalent to commercial polymers in terms of purity and structural morphology, indicating their utility for industrial and medical applications. Thus, H. illucens prepupae is a promising alternative source of chitin. 2023, African Association of Insect Scientists.
Rampure S.M.; Velayudhannair K.; Marimuthu N.
International Journal of Tropical Insect Science, Vol-43, No. 3, pp. 979-987.
Rampure S.M., Department of Life Sciences, CHRIST (Deemed to be University), Bangalore Central Campus, Dharmaram Post, Hosur Road, Karnataka, Bengaluru, 560029, India; Velayudhannair K., Department of Life Sciences, CHRIST (Deemed to be University), Bangalore Central Campus, Dharmaram Post, Hosur Road, Karnataka, Bengaluru, 560029, India; Marimuthu N., Department of Chemistry, CHRIST (Deemed to be University), Bangalore Central Campus, Hosur Road, Karnataka, Bengaluru, 560029, India
Mitigation of harmonics for five level multilevel inverter with fuzzy logic controller
cascade H-bridge multilevel inverters; fuzzy logic controller; selective pulse width modulation technique; total harmonic distortion
Introduction. The advantages of a high-power quality waveform and a high voltage capability of multilevel inverters have made them increasingly popular in recent years. These inverters reduce harmonic distortion and improve the voltage output. Realistically speaking, as the number of voltage levels increases, so does the quality of the multilevel output-voltage waveform. When it comes to industrial power converters, these inverters are by far the most critical. Novelty. Multilevel cascade inverters can be used to convert multiple direct current sources into one direct current. These inverters have been getting a lot of attention recently for high-power applications. A cascade H-bridge multilevel inverter controller is proposed in this paper. A change in the pulse width of selective pulse width modulation modulates the output of the multilevel cascade inverter. Purpose. The total harmonic distortion can be reduced by using filters on controllers like PI and fuzzy logic controllers. Methods. The proposed topology is implemented with MATLAB/Simulink, using gating pulses and pulse width modulation methodology and fuzzy logic controllers. Moreover, the proposed model also has been validated and compared to the hardware system. Results. Total harmonic distortion, number of power switches, output voltage and number of DC sources are analyzed with conventional topologies. Practical value. The proposed topology has been very supportive for implementing photovoltaic based multilevel inverter, which is connected to large demand in grid and industry. M.S. Sujatha, S. Sreelakshmi, E. Parimalasundar, K. Suresh.
Sujatha M.S.; Sreelakshmi S.; Parimalasundar E.; Suresh K.
Electrical Engineering and Electromechanics, Vol-2023, No. 4, pp. 52-56.
National Technical University "Kharkiv Polytechnic Institute"
All Open Access; Gold Open Access; Green Open Access
Sujatha M.S., Department of Electrical & Electronics Engineering, Sree Vidyanikethan Engineering College, AP, Tirupati, 517102, India; Sreelakshmi S., Department of Electrical and Electronics Engineering, Jawaharlal Nehru Technological University Anantapur, AP, Anantapuramu, 517102, India; Parimalasundar E., Department of Electrical & Electronics Engineering, Sree Vidyanikethan Engineering College, AP, Tirupati, 517102, India; Suresh K., Department of Electrical and Electronics Engineering, Christ (Deemed to be University), Bangalore, India
Capacitive Behaviour of Imidazole Azo Modified Carbon Nanotubes/Polypyrrole Composite in Aqueous Electrolytes
Here, we reported imidazole azo (Im) modified carbon nanotubes (CNT) grafted polypyrrole (PPy) via the chemical oxidation method. The synthesized hybrid material has shown a unique structure consisting of carbon nanotubes with a conductive network via polypyrrole. The presence of Im derivatives has helped CNTs to enhance their electrochemical performances. The as synthesized composite was characterized using various techniques like FT-IR, XRD, XPS, and Raman spectroscopy. The morphological studies were performed using SEM technique which also confirmed the nature of the composite. The electrochemical performances of the electrode material were investigated using cyclic voltammetry, galvanostatic charge-discharge, and electrochemical impedance spectroscopy in various electrolytes. The best performance of the electrode material was observed in 1 M H2SO4 with a specific capacitance of 305 F g?1 at a current density of 1 A g?1. The electrode material also showed a coulombic efficiency of 96% even after 5000 cycles. 2023 The Electrochemical Society (ECS). Published on behalf of ECS by IOP Publishing Limited.
Baby A.; Saranraj A.; Abinaya S.; Sujin P. J.; Aswathi V.P.; Puthenveetil Balakrishnan S.
Journal of the Electrochemical Society, Vol-170, No. 6
https://doi.org/10.1149/1945-7111/acdda1 https://www.scopus.com/inward/record.uri?eid=2-s2.0-85163708234&doi=10.1149%2f1945-7111%2facdda1&partnerID=40&md5=a8a0fbd812de4da58bdbf47446df6069
Baby A., Department of Chemistry, CHRIST (Deemed to be University), Karnataka, Bengaluru, 560029, India; Saranraj A., Advanced Materials Laboratory, School of Physics, Madurai Kamaraj University, Madurai, 625021, India; Abinaya S., Advanced Materials Laboratory, School of Physics, Madurai Kamaraj University, Madurai, 625021, India; Sujin P. J., Advanced Materials Laboratory, School of Physics, Madurai Kamaraj University, Madurai, 625021, India; Aswathi V.P., Department of Chemistry, CHRIST (Deemed to be University), Karnataka, Bengaluru, 560029, India; Puthenveetil Balakrishnan S., Department of Chemistry, CHRIST (Deemed to be University), Karnataka, Bengaluru, 560029, India
Adsorptive removal studies of Rhodamine B by PEG capped polyaniline/TiO2/CuO composite
Adsorption isotherm; Adsorption kinetics; Adsorption thermodynamics; PANI/TiO2/CuO composite; Rhodamine B dye
The availability of pure and fresh water is the prime need of human beings for survival. The fact that the rate of water pollution is alarmingly increasing is making scientists think of ways to minimize the pollution effects. Among the numerous techniques, adsorption is the most cost-effective and easy method for removing pollutants from water bodies. In this study, a ternary PEG capped polyaniline/TiO2/CuO composite with excellent surface area is synthesized, and its adsorption studies carried out using Rhodamine B, one of the strongest organic pollutants. The characterization studies of the prepared composites have been done using XRD, FT-IR, HR-TEM, DLS, zeta potential, BET, and XPS analyses. Isotherm, kinetics, and thermodynamic studies of adsorption have been done for the prepared composite to evaluate its adsorptive efficiency. The adsorption studies of RhB dye using the synthesized composite followed the Langmuir adsorption isotherm. The kinetics study for the adsorption process indicates that pseudo second order kinetics fits best with the adsorption process taking place on the PANI/TiO2/CuO composite. The thermodynamic studies reveal the spontaneity of the process and the exothermic behavior at lower temperatures. The results prove the efficiency of the synthesized adsorbent towards environmental remediation studies. 2023 Elsevier Ltd
https://doi.org/10.1016/j.mtcomm.2023.105739 https://www.scopus.com/inward/record.uri?eid=2-s2.0-85149435435&doi=10.1016%2fj.mtcomm.2023.105739&partnerID=40&md5=13ed1d9426a24562cd2d0cd3499f9aa8
Varghese A., Department of Chemistry, CHRIST (Deemed to be University), Karnataka, Bengaluru, 560029, India; K.R. S.D., Department of Chemistry, CHRIST (Deemed to be University), Karnataka, Bengaluru, 560029, India; Pinheiro D., Department of Chemistry, CHRIST (Deemed to be University), Karnataka, Bengaluru, 560029, India
Autoregressive Distributed Lag Approach for Estimating the Nexus between Net Asset Value of Mutual Fund and Economic Determinants in India
large cap; macroeconomic factors; mutual fund; net asset value; small cap and mid cap
India has seen a phenomenal growth in cumulative mutual fund investment from Rs 7.93 trillion in 2012 to Rs 40.38 trillion in 2022, which is more than a five-fold increase since last 10 years. Retail investors are now realizing the power of savings and Systematic Investment Plans (SIP) to build long term wealth. A financial literacy wave which is sweeping across India has projected mutual funds as a significant contributor and beneficiary of this phenomenon. The evolving economic landscape of India provides investors with excellent opportunities to capitalize on these fluctuations through systematic investment in safe investment vehicles like mutual funds. The market associated with mutual funds is always subjected to economic risks. The erratic fluctuations in macroeconomic variables can largely explain the Volatility in Net Asset Value (NAV) of equity oriented mutual fund schemes. With this background, this paper examines the impact of select macroeconomic variables on mutual funds performance in India. To analyse this, monthly observations of select macroeconomic variables, average NAV of large cap, mid cap, and small cap funds collected for a period of 10 years starting from January 2013 to November 2022. Descriptive statistics is used to probe the characteristics of the variable. In addition, correlation and ordinary least square method is applied to check the existing relationship and impact level of macroeconomic factors on NAV of select schemes. Lastly, short and long run relationship is analysed using Autoregressive Distributed Lag Model (ARDL). 2023, ASERS Publishing House. All rights reserved.
Pachiyappan S.; Shrivastava A.; Raj V.J.P.; Vellaiyan S.
Theoretical and Practical Research in the Economic Fields, Vol-14, No. 1, pp. 186-201.
All Open Access; Hybrid Gold Open Access
https://doi.org/10.14505/tpref.v14.1(27).15 https://www.scopus.com/inward/record.uri?eid=2-s2.0-85163693324&doi=10.14505%2ftpref.v14.1%2827%29.15&partnerID=40&md5=6a779b09ee44d1da2e0be9abd3efe76b
Pachiyappan S., School of Business and Management, CHRIST (Deemed to be University), Bangalore, India; Shrivastava A., School of Business and Management, CHRIST (Deemed to be University), Bangalore, India; Raj V.J.P., School of Business and Management, CHRIST (Deemed to be University), Bangalore, India; Vellaiyan S., School of Business and Management, CHRIST (Deemed to be University), Bangalore, India
A Selective Excited-State Intramolecular-Proton-Transfer (ESIPT) Sensor for Copper(II) Based on Chelation-Enhanced Quenching and Off-On Detection of Amino Acids
amino acids; chelation; ESIPT; fluorescence; ratiometry
We report the synthesis of 2-(4,5-diphenyl-1H-imidazole-2-yl)phenol (TPI-9) as an interesting fluorescent molecule displaying Excited-State Intramolecular-Proton-Transfer (ESIPT) with stokes shift of 120 nm. Phenolic compounds with the ability to form intramolecular hydrogen bonds and subsequent proton transfer are known as ESIPT fluorophores. Proton accepting ability can increase significantly by tailoring electron-donating groups. With the assistance of an environment-friendly organocatalyst, 10-camphor sulfonic acid (10-CSA), TPI-9 was synthesized to introduce substituents with electron-donating abilities to develop an efficient ESIPT mechanism. Factors influencing the emission, such as solvent, pH, and metal ions, are investigated. Quenching of fluorescence by Cu2+ through chelation enhancement quenching effect with a high selectivity allowed the establishment of a Cu2+ sensor with an LoD of 0.57 ppm and a ratiometric estimation with an LoD of 0.73 ppm. Metal binding (2 : 1) stoichiometry and quenching constant (0.0072 mol?1s?1) are calculated from Job's and Stern-Volmer plots. Density functional theory (DFT) calculations are in accordance with the experimental results. Competitive replacement of TPI-9 by amino acids restores ESIPT, consequently, the fluorescence. Thus, an off-on fluorescence sensor for amino acid estimation is developed under 1 minute incubation. A linear relationship between amino acid concentration and fluorescence intensity is in 0-20 ?g/mL range, and the LoD is less than 2.2 ?g/mL. 2023 Wiley-VCH GmbH.
Chemistry - A European Journal, Vol-29, No. 25
ISSN: 9476539; PubMed ID: 36750756; CODEN: CEUJE
https://doi.org/10.1002/chem.202203652 https://www.scopus.com/inward/record.uri?eid=2-s2.0-85150635996&doi=10.1002%2fchem.202203652&partnerID=40&md5=91ca8a52442f09e3d2b8039c2a01004a
Devasia J., Department of Chemistry, CHRIST (Deemed to be University) Hosur road, DRC post, Bangalore, 560029, India; Joy F., Department of Chemistry, CHRIST (Deemed to be University) Hosur road, DRC post, Bangalore, 560029, India; Nizam A., Department of Chemistry, CHRIST (Deemed to be University) Hosur road, DRC post, Bangalore, 560029, India
Effects of Rough Boundaries on RayleighBenard Convection in Nanofluids
A linear stability analysis of RayleighBenard convection in a Newtonian nanofluid is carried out using most general boundary conditions. A single-phase description of nanofluids is adopted in the study. The nanofluids used for the study are wateralumina and watercopper nanofluids in order to analyze how a choice between them can be made. The values of thermophysical quantities of nanofluids are calculated using the mixture theory and phenomenological-laws. The paper applies the Maclaurin series in solving the boundary-eigenvalue-problem through a simple and innovative approach. A single-term Galerkin technique is adopted to obtain the guess value of the critical Rayleigh number and the wave number. Further, improved values of the Rayleigh number and the wave number are obtained using the solution of a system of three linear-algebraic equations. A detailed discussion is made on the effect of rough-boundaries and Robin-boundary conditions for temperature on the onset of convection. A comparative study between the results of two nanofluids is made and the destabilizing effect of nanoparticles in the Newtonian carrier-fluid on the onset of convection is studied. Copyright 2023 by ASME.
ASME Journal of Heat and Mass Transfer, Vol-145, No. 6
American Society of Mechanical Engineers (ASME)
https://doi.org/10.1115/1.4056661 https://www.scopus.com/inward/record.uri?eid=2-s2.0-85168907350&doi=10.1115%2f1.4056661&partnerID=40&md5=9197eaa40e8e34727393815d563d8eb8
Firdose H., Centre for Mathematical Needs, Mathematics Department, CHRIST (Deemed to be University), Bengaluru, 560029, India; Siddheshwar P.G., Centre for Mathematical Needs, Mathematics Department, CHRIST (Deemed to be University), Bengaluru, 560029, India; Idris R., Special Interest Group of Modelling and Data Analytics, Faculty of Ocean Engineering Technology and Informatics, Universiti Malaysia Terengganu, Kuala Nerus, Terengganu, 21030, Malaysia
IOT-BASED cyber security identification model through machine learning technique
Cyber security; Internet of things; Machine learning algorithms; Meta-classifier methods; Repositories; Security
Manual vulnerability evaluation tools produce erroneous data and lead to difficult analytical thinking. Such security concerns are exacerbated by the variety, imperfection, and redundancies of modern security repositories. These problems were common traits of producers and public vulnerability disclosures, which make it more difficult to identify security flaws through direct analysis through the Internet of Things (IoT). Recent breakthroughs in Machine Learning (ML) methods promise new solutions to each of these infamous diversification and asymmetric information problems throughout the constantly increasing vulnerability reporting databases. Due to their varied methodologies, those procedures themselves display varying levels of performance. The authors provide a method for cognitive cybersecurity that enhances human cognitive capacity in two ways. To create trustworthy data sets, initially reconcile competing vulnerability reports and then pre-process advanced embedded indicators. This proposed methodology's full potential has yet to be fulfilled, both in terms of its execution and its significance for security evaluation in application software. The study shows that the recommended mental security methodology works better when addressing the above inadequacies and the constraints of variation among cybersecurity alert mechanisms. Intriguing trade-offs are presented by the experimental analysis of our program, in particular the ensemble method that detects tendencies of computational security defects on data sources. 2023 The Authors
Lal B.; Ravichandran S.; Kavin R.; Anil Kumar N.; Bordoloi D.; Ganesh Kumar R.
https://doi.org/10.1016/j.measen.2023.100791 https://www.scopus.com/inward/record.uri?eid=2-s2.0-85159550720&doi=10.1016%2fj.measen.2023.100791&partnerID=40&md5=0b3e4993e4256d13a2f57747dc17b17c
Lal B., Dept. of Computer Science and Engineering, Koneru Lakshmaiah Education Foundation, Vaddeswaram, Guntur Dist, A.P, India; Ravichandran S., Department of Computer Science and Engineering, School of Technology, GITAM University, Rudraram, Telangana, Hyderabad, 502 329, India; Kavin R., Department of Electrical and Electronics Engineering, Sri Krishna College of Engineering and Technology, Tamil Nadu, Coimbatore, 641008, India; Anil Kumar N., Department of Electronics & Communication Engineering, School of Engineering & Technology, Mohan Babu University (Erst while Sree Vidyanikethan Engineering College), Andhra Pradesh, Tirupati, India; Bordoloi D., Computer Science and Engineering, Graphic Era Hill University, Dehradun, India, R/S, CSE, Graphic Era Deemed To Be University, Uttarakhand, Dehradun, 248002, India; Ganesh Kumar R., Department of Computer Science and Engineering, CHRIST (Deemed to be University), School of Engineering and Technology, Kengeri Campus, Kumbalgodu, Bangalore, 560074, India
Empowered learning in school: A scoping review
Academic; Empowerment; Learning; Method; School
A high degree of motivation, a sense of commitment, self-efficacy and the ability to make the right choices are the characteristics of empowered learners. With education being seen as preparation for life, educators are increasingly pressured to develop curriculum and pedagogy that assist learners to become empowered. Based on the theoretical framework developed by Arksey and OMalley, the present study reviewed 16 empowered learning intervention studies at the school level published between the years 1995 and 2021 as well as provides an extensive summary of empowered learning enhancing interventions conducted in schools. This study highlights the concept of empowered learning, features and scope of interventions directed towards empowered learning of students at schools and the role of empowered learning in schools. Notwithstanding varied intervention results, the findings of this study indicate that empowered learning interventions produce highly motivated students with a sense of commitment and self-efficacy. This review also identifies the need for more pure experimental studies and a commonly accepted theory on empowered learning as a single concept. 2023, Institute of Advanced Engineering and Science. All rights reserved.
International Journal of Evaluation and Research in Education, Vol-12, No. 2, pp. 729-738.
Institute of Advanced Engineering and Science
https://doi.org/10.11591/ijere.v12i2.24429 https://www.scopus.com/inward/record.uri?eid=2-s2.0-85151344513&doi=10.11591%2fijere.v12i2.24429&partnerID=40&md5=1d98227daef632a30f60bac51b95724c
Titus A., Department of Education, Christ University, Bengaluru, India; Muttungal P.V., Department of Education, Faculty of Arts and Humanities, Christ University, Bengaluru, India
Impediments of product recovery in circular supply chains: Implications for sustainable development
circular supply chains; fuzzy VIKOR; Product recovery; sustainable development
Product recovery has fascinated the concentration of organizations and is prominent among industry practitioners and researchers due to improved environmental concerns, social awareness, and economic benefits. Circular supply chain (CSC) compounds the concept of product recovery in global supply chain management to present a sustainable perspective. Therefore, this study aims to determine impediments of product recovery and CSC toward sustainable production and consumption in the background of manufacturing organizations. This study determines potential impediments from literature and in consultation with experts. Further, a fuzzy VIKOR approach is practiced to prioritize the impediments of product recovery and CSC. Then, a sensitivity analysis is conducted to verify the robustness of the framework attained. The results from the study reflect that lack of collaboration from supply chain performers, lack of tax policies for facilitating CSC models and limited expertise, technology, information on CSC practices are the critical impediments to product recovery in CSCs. The findings of the study could assist industry managers and practitioners in developing procedures and strategies to attain sustainable development. 2022 The Authors. Sustainable Development published by ERP Environment and John Wiley & Sons Ltd.
Agrawal D.; Dwivedi A.; Patil A.; Paul S.K.
Sustainable Development, Vol-31, No. 3, pp. 1618-1637.
https://doi.org/10.1002/sd.2472 https://www.scopus.com/inward/record.uri?eid=2-s2.0-85144162680&doi=10.1002%2fsd.2472&partnerID=40&md5=67569da68abcd5d3faaee16b0e1fd9ea
Agrawal D., SOIL School of Business Design, Gurugram, India; Dwivedi A., Jindal Global Business School, O.P. Jindal Global University, Sonipat, India; Patil A., School of Business and Management, Christ University, Bangalore, India; Paul S.K., UTS Business School, University of Technology Sydney, Sydney, Australia
Green synthesis, characterization of silver nanoparticles using aqueous leaf extracts of Solanum melongena and in vitro evaluation of antibacterial, pesticidal and anticancer activity in human MDA-MB-231 breast cancer cell lines
Anti-bacterial; Cytotoxicity; Leaves; Pesticidal; Silver nanoparticles; Solanum melongena
The present study validated the green synthesis and characterization of AgNPs using the leaf extracts of Solanum melongena (SM-AgNPs). The efficiency of the phytocompounds in the leaf extract in reducing Ag+ to Ag0 ions was studied. The synthesized SM-AgNPs were characterized by spectroscopic methods and standard methods were adopted for the antioxidant activity, HPTLC, cytotoxicity and antimicrobial assays and pesticidal activity as well. The synthesised nanoparticle was measured to be 20.54 nm which was confirmed by the characterization. The total phenolic content was 5.98 0. GAE/g which indicated potent antioxidant activity. HPTLC profile showed thirteen peaks corresponding to the phenolic compounds with Rf values ranging from 0.05 to 0.95. The average particle size and zeta potential was 75.14 nm-19.8 mV respectively. Cytotoxicity assay of the synthesized AgNP's showed viability percentage of 50.23 at 100 mg/mL. Treatment of MDA-MB-231 cell lines with the SM-AgNPs induced early apoptosis in a greater number of cells. The synthesizedAgNPs were effective against the bacterial isolates Escherichia coli, Pseudomonas aeruginosa, Shigella flexneri, Proteus vulgaris, Klebsiella pneumoniae and Staphylococcus aureus. High mortality of Bemisiatabaci was observed in the100 g/mL of the SM-AgNPs treated concentrations. The study demonstrated the efficiency of SM-AgNPs against cancer cell lines, microbial isolates and insect pests. 2023 The Author(s)
Pushparaj K.; Balasubramanian B.; Kandasamy Y.; Arumugam V.A.; Kaliannan D.; Arumugam M.; Abdulrahman Alodaini H.; Atef Hatamleh A.; Pappuswamy M.; Meyyazhagan A.
Journal of King Saud University - Science, Vol-35, No. 5
Pushparaj K., Department of Zoology, School of Biosciences, Avinashilingam Institute for Home Science and Higher Education for Women, Tamil Nadu, Coimbatore, 641 043, India; Balasubramanian B., Department of Food Science and Biotechnology, College of Life Science, Sejong University, Seoul, 05006, South Korea; Kandasamy Y., Department of Zoology, School of Biosciences, Avinashilingam Institute for Home Science and Higher Education for Women, Tamil Nadu, Coimbatore, 641 043, India; Arumugam V.A., Department of Human Genetics and Molecular Biology, Bharathiar University, Tamil Nadu, Coimbatore, 641 046, India; Kaliannan D., Department of Infection Biology, School of Medicine, Wonkwang University, lksan, 54538, South Korea; Arumugam M., Department of Botany, School of Life Sciences, Periyar University, Tamil Nadu, Salem, India; Abdulrahman Alodaini H., Department of Botany and Microbiology, College of Science, King Saud University, P.O. Box 2455, Riyadh, 11451, Saudi Arabia; Atef Hatamleh A., Department of Botany and Microbiology, College of Science, King Saud University, P.O. Box 2455, Riyadh, 11451, Saudi Arabia; Pappuswamy M., Department of Life Sciences, CHRIST (Deemed to be University), 560029 Karnataka, Bengaluru, India; Meyyazhagan A., Department of Life Sciences, CHRIST (Deemed to be University), 560029 Karnataka, Bengaluru, India, Centre of Perinatal and Reproductive Medicine, Department of Translational Medicine and Surgery, University of Perugia, Perugia, Italy
Modelling and optimization of Rhodamine B degradation over Bi2WO6Bi2O3 heterojunction using response surface methodology
Bismuth tungstate; p-n heterojunction; Photodegradation; Response surface optimization; Sensitivity analysis; Water pollution
The Bi2O3/Bi2WO6 heterostructures of various compositions are prepared via the surfactant-assisted solgel method, which exhibits enhanced and synergistic photocatalytic activity towards the degradation of Rhodamine B (Rh B) using visible light irradiation. Characterization of these heterostructures has been done using X-ray diffraction, microscopic and spectroscopic methods. The 50% tungstate in bismuth oxide (BWO) nanocomposites having band gap of 2.85eV and an average size of 4080nm shows maximum dye removal up to 87% in 4h compared to pure Bi2O3 and other heterostructures of Bi2O3/Bi2WO6. The reusability studies demonstrate the excellent retention of photocatalytic activity without much loss in activity, implying the stability and efficiency of the prepared catalyst. The degradation of the Rh B dye is modeled mathematically to analyze the interactive effects of the key parameters like the time, amount of catalyst, and dye concentration, and to determine the optimal setting of these parameters to optimize the degradation process using the face-centered Central Composite Design (FC-CCD) of the Response Surface Methodology (RSM) analysis. An accurate full quadratic model has been developed with R2 = 99.41%. The sensitivity of the degradation was evaluated at all levels of the key parameters. At 0.1g of catalyst amount, it was found that the increment of the catalyst amount would be suitable for improved degradation as compared to allowing more time for the degradation. The maximum degradation was obtained for a dye concentration of 5ppm, and 0.1g catalyst for 4h. 2022, King Abdulaziz City for Science and Technology.
Devi K.R.S.; Karthik K.; Mackolil J.; Mahanthesh B.; Reghunath B.S.; Pinheiro D.
Applied Nanoscience (Switzerland), Vol-13, No. 6, pp. 3749-3765.
Springer Science and Business Media Deutschland GmbH
Devi K.R.S., Department of Chemistry, CHRIST (Deemed to Be University), Karnataka, Bangalore, 560029, India; Karthik K., Department of Chemistry, CHRIST (Deemed to Be University), Karnataka, Bangalore, 560029, India; Mackolil J., Centre for Mathematical Needs, Department of Mathematics, CHRIST (Deemed to Be University), Karnataka, Bangalore, 560029, India; Mahanthesh B., Centre for Mathematical Needs, Department of Mathematics, CHRIST (Deemed to Be University), Karnataka, Bangalore, 560029, India; Reghunath B.S., Department of Chemistry, CHRIST (Deemed to Be University), Karnataka, Bangalore, 560029, India; Pinheiro D., Department of Chemistry, CHRIST (Deemed to Be University), Karnataka, Bangalore, 560029, India
Evaluation of phytoconstituents of Triticum aestivum grass extracts on nutritional attributes, antioxidant, and antimicrobial activities against food pathogens with molecular in silico investigation
carbohydrates; diphenyl-1-picryl-hydrazyl; gas columnmass spectroscopy; proteins; Pseudomonas aeruginosa; Staphylococcus aureus
The plant-based medicine and diet is gaining importance in recent days. The consumption of Triticum aestivum grass in the form of juice and tablets is increasing among common people. The present study elaborates on the nutritional, antioxidant, and antimicrobial potential of a nongenetically modified type of T. aestivum grass, along with the evidence of molecular docking studies. The T. aestivum grass extracts like decoction, aqueous, ethanol, and chloroform were subjected to preliminary phytochemical tests, quantitative estimation, antioxidant analysis, and antimicrobial activity determination. The ethanolic extract that had good antioxidant and antimicrobial potential was subjected to gas columnmass spectroscopy (GCMS) analysis and the compounds identified were docked against the antioxidant and antimicrobial receptors. The decoction and aqueous extracts performed well in preliminary qualitative tests with the presence of most of the phytochemicals tested. The decoction, aqueous, and ethanolic extracts possessed good concentrations of the phytochemicals. The decoction had about 210.839.16 and 154.160.33mg/g of carbohydrates and proteins, respectively, while the aqueous extract had about 10.910.08mg/g of amino acids and the ethanolic extract had about 52.51.4mg/g of phenolic content, which were the highest concentration of the phytochemicals observed among the extracts. Along with phytochemical potential, good antioxidant potential in the DPPH and ABTS by decoction as well as ethanolic extract with nearly 40 and 90% inhibition, respectively, and in FRAP by aqueous extract with maximum OD value. The ethanolic extract exhibited the best inhibition potential against the Staphylococcus aureus about 281mm, Pseudomonas aeruginosa with 202mm, Bacillus cereus at 201mm by the ethanolic extract at 200?g concentration, and Aspergillus fumigatus and A. niger at 150mm by the aqueous extract at 200?g concentration. The GCMS analysis revealed the presence of terpenoids, alkaloids, and phenols, which on docking had highest binding capacity toward the antioxidant and antimicrobial receptors. 2023 The Authors. Food Frontiers published by John Wiley & Sons Australia, Ltd and Nanchang University, Northwest University, Jiangsu University, Zhejiang University, Fujian Agriculture and Forestry University.
Kaviya M.; Balamuralikrishnan B.; Sangeetha T.; Senthilkumar N.; Malaisamy A.; Sivasamy M.; Poorni L.; Pushparaj K.; Arun M.; Anand A.V.
Food Frontiers, Vol-4, No. 2, pp. 831-848.
https://doi.org/10.1002/fft2.233 https://www.scopus.com/inward/record.uri?eid=2-s2.0-85157983994&doi=10.1002%2ffft2.233&partnerID=40&md5=2a68fedd40afeae4218bfbacb781054e
Kaviya M., Department of Human Genetics and Molecular Biology, Bharathiar University, Tamil Nadu, Coimbatore, India; Balamuralikrishnan B., Department of Food Science and Biotechnology, College of Life Science, Sejong University, Seoul, South Korea; Sangeetha T., Department of Human Genetics and Molecular Biology, Bharathiar University, Tamil Nadu, Coimbatore, India; Senthilkumar N., Department of Bioprospecting of Forest Resources, Institute of Forest Genetics and Tree Breeding (IFGTB), Forest Campus, Tamil Nadu, Coimbatore, India; Malaisamy A., Transcription Regulation Group, International Centre for Genetic Engineering and Biotechnology (ICGEB), New Delhi, India; Sivasamy M., Division of Crops Improvement, Indian Council of Agricultural Research (ICAR) - Indian Agricultural Research Institute, Regional Station, Wellington, Tamil Nadu, Nilgiris, India; Poorni L., Department of Biochemistry, Vivekanandha College of Arts and Sciences for Women, Tamil Nadu, Namakkal, India; Pushparaj K., Department of Zoology, School of Biosciences, Avinashilingam Institute for Home Science and Higher Education for Women, Tamil Nadu, Coimbatore, India; Arun M., Department of Life Sciences, CHRIST (Deemed to be University), Karnataka, Bengaluru, India; Anand A.V., Department of Human Genetics and Molecular Biology, Bharathiar University, Tamil Nadu, Coimbatore, India
Gandhiji and RSS: The Cultural Grounding of Social Representations
Congress; Culture; Gandhiji; Golwalkar; Hedgewar; Muslim League; RSS
Exploring the cordial relationship and mutual respect between Gandhiji and the Rashtriya Swayamsevak Sangh (RSS), this article critically examines the political rhetoric against the RSS and its implications. As a nationalist cultural organisation, the RSS had been well aligned with most of the social and cultural programmes initiated by Gandhiji. When critics of the RSS like Jawaharlal Nehru were keen on crushing the RSS, the truth-seeking political philosopher Gandhiji applauded its discipline, annihilation of untouchability and the rigorous simplicity. This article demonstrates how the serious charges against the RSS that were brought to the notice of Gandhiji by a section of Congress leaders further cemented the cultural grounding of social representations between the two, instead of making Gandhiji be the stranger of the RSS. 2023 ICHR.
Indian Historical Review, Vol-50, No. 1, pp. 109-128.
Doss M.C., School of Social Sciences, Christ (Deemed to Be University), Karnataka, Bengaluru, India
Stress and resilience in British Indian parents with an autistic child: a comparative study with white British and Indian parents
Autism spectrum disorder; British Indian parents; Cultural comparison; Stress and resilience
Purpose: This study aims to examine the levels of stress and resilience in a sample of British Indian parents bringing up a child with autism. Design/methodology/approach: A total of 52 British Indian parents took part in a survey that included measures of stress, resilience, support and child adaptive functioning. Results were compared to a sample of white British (n = 120) and Indian parents (n = 120). Findings: The British Indian parents recorded higher levels of stress and less perceived social support than their white British counterparts. British Indian parents took longer to register concern about their childs development and sought a diagnosis at a later age than the white British group. The delay in concern and diagnosis was similar to that found in the India group. Originality/value: The research suggests that British Indian parents are disadvantaged in social support and mental well-being compared to white British parents and may face similar community pressures to parents bringing up a child in India. 2023, Emerald Publishing Limited.
Advances in Autism, Vol-9, No. 3, pp. 279-292.
https://doi.org/10.1108/AIA-09-2022-0048 https://www.scopus.com/inward/record.uri?eid=2-s2.0-85161630779&doi=10.1108%2fAIA-09-2022-0048&partnerID=40&md5=8902f38a122f0acb841233a68197eb2b
Stagg S., School of Psychology and Sports Science, Anglia Ruskin University Cambridge Campus, Cambridge, United Kingdom; Kodakkadan F., School of Psychology and Sports Science, Anglia Ruskin University Cambridge Campus, Cambridge, United Kingdom; Rajan S.K., Department of Psychology, Christ University, Bangalore, India