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Ultrasensitive and selective electrochemical detection of hydroquinone using electropolymerized 7-amino cephalosporanic acid modified GCE

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Surface and Coatings technology 2025年 512卷

作者： Sathya, H. Varatharajan, Pandiaraja Ashkar, M.A. Chandhru, M. Govindasamy, Mani Rani, S. Kutti Vasimalai, N. Department of Chemistry B.S. Abdur Rahman Crescent Institute of Science and Technology Chennai Vandalur600 048 India International Ph.D. Program in Innovative Technology of Biomedical Engineering and Medical Devices Ming Chi University of Technology New Taipei City243303 Taiwan Department of Physics B.S. Abdur Rahman Crescent Institute of Science and Technology Chennai Vandalur600 048 India Tamil Nadu Chennai602105 India Research Center for Intelligent Medical Devices Ming Chi University of Technology New Taipei City243303 Taiwan

Industrial wastewater pollution harms ecosystems and hinders sustainable development growth. Particularly, hydroquinone (HQ) has transitioned from a commercial chemical to an environmental hazard because of its extensive use in beauty products, pharmaceuticals, chemicals, and food industries. Therefore, developing electrochemical sensors for the detection of HQ is very important for environmental safety. Herein, the 7-ACA monomer was electropolymerized on the glassy carbon electrode (GCE) surface to examine the electrochemical oxidation of HQ utilizing CV (cyclic voltammetry) and DPV (differential pulse voltammetry) techniques. Scanning electron microscopy (SEM) characterization verified the deposition of the p-7-ACA on the glassy carbon electrode (GCE) surface. The designed p-7-ACA@GCE sensor exhibited better electrocatalytic properties. The acquired DPV observations for the p-7-ACA@GCE demonstrated excellent limit of detection (LOD) 8.86 nmol L−1 and broad linear range (0.33 μM to 955 μM) for the detection of HQ. The developed sensor exhibits excellent repeatability, reproducibility, selectivity and better cyclic stability. In addition, the fabricated p-7-ACA@GCE was used to determine the HQ in a different environmental water sample. © 2025

关键词： Cyclic voltammetry

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Green synthesis of iron oxide nanoparticles using Pterolobium hexapetalum (roth) santapau & wagh leaves extract and their biological applications

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Biocatalysis and Agricultural Biotechnology 2023年 54卷

作者： Loganathan, Settu Govindasamy, Mani Habila, Mohamed A. Manimaran, Kumar Department of Botany Government Arts College Tamil Nadu Dharmapuri 636 705 India Department of Anatomy Saveetha Dental College and Hospital Saveetha Institute of Medical and Technical Sciences Tamil Nadu Chennai 600077 India International Program in Innovative Technology of Biomedical Engineering and Medical Devices Ming Chi University of Technology New Taipei City 243303 Taiwan Research Center for Intelligence Medical Devices Ming Chi University of Technology New Taipei City 243303 Taiwan Department of Chemistry College of Science King Saud University P. O. Box 2455 Riyadh 11451 Saudi Arabia Research Center for Applied Microbiology National Research and Innovation Agency (BRIN) JI. Raya Bogor Km. 46 Cibinong 16911 Indonesia Korea University 145 Anam-ro Seongbuk-gu Seoul South Korea

Plants produce several secondary metabolites, which have a variety of therapeutic applications. In this study, green synthesis of Iron oxide nanoparticles (FeO-NPs) utilized Pterolobium hexapetalum aqueous leaf extract (Ph-ALE). The UV, XRD, IR, FE-SEM-EDAX, and HR-TEM with SAED patterns were characterized by Ph-FeO-NPs. In UV–visible spectra, Ph-FeO-NPs had an absorbance peak at 290 nm. The X-ray diffraction pattern showed their crystalline nature of Ph-FeO-NPs. The FT-IR spectrum of the synthesized Ph-FeO-NPs revealed the presence of various functional groups such as, Alcohols & Phenols, Aldehyde, Alkene, Carboxylic acids, Chloride and Bromide & Iodide. The FE-SEM and HR-TEM image of Ph-FeO-NPs shows a spherical shape with a size ranging from 20 to 28 nm. The EDaX study displayed the presence of Fe signals of Ph-FeO-NPs. Further, the green synthesized Ph-FeO-NPs demonstrated significant antibacterial activity, with the maximum zone of inhibition was noticed in S. typhi at 50 μg. The antioxidant study of the synthesized Ph-FeO-NPs displayed remarkable activity against DPPH, ABTS radical scavenging assays with an IC₅₀ value of 134.42;367.39 μg/mL respectively. In moreover, the synthesized Ph-FeO-NPs exhibited strong anticancer activity against the A549 cell line with an IC₅₀ value of 54.32 μg/mL. In addition, the synthesized Ph-FeO-NPs demonstrated potential larvicidal activity against Cx. quinquefasciatus larvae with an LC₅₀ & LC₉₀ values of 2.437;10.639 mg/mL, respectively. As a result, the synthesized Ph-FeO-NPs displayed exceptional clinical performance and serve as a source of medication as well as a platform for the development of novel drugs. © 2023

关键词： Anti-proliferative Antioxidant Larvicidal activity Pterolobium hexapetalum

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Correction: Biomass derived nitrogen functionalized carbon nanodots for nanomolar determination of levofloxacin in pharmaceutical and water samples

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Mikrochimica acta 2023年第7期190卷 269页

作者： Velusamy Arul Natarajan Sampathkumar Sindhuja Kotteeswaran Ponnusamy Arul Ahmed Muteb Aljuwayid Mohamed A Habila Mani Govindasamy Department of Chemistry Sri Eshwar College of Engineering (Autonomous) Coimbatore 641 202 Tamil Nadu India. kvarulchem6@***. Department of Chemistry Korea University 145 Anam-Ro Seongbuk-Gu Seoul South Korea. kvarulchem6@***. Department of Chemistry SSM College of Arts and Science Dindigul 624002 Tamil Nadu India. International PhD Program in Innovative Technology of Biomedical Engineering and Medical Devices Ming Chi University of Technology New Taipei City 243303 Taiwan. Department of Chemical Engineering and Biotechnology Institute of Biochemical and Biomedical Engineering National Taipei University of Technology Taipei 106 Taiwan ROC. vpsarul@***. Department of Chemistry College of Science King Saud University P. O. Box 2455 Riyadh 11451 Saudi Arabia. International PhD Program in Innovative Technology of Biomedical Engineering and Medical Devices Ming Chi University of Technology New Taipei City 243303 Taiwan. govindasamy420700@***. Research Center for Intelligence Medical Devices Ming Chi University of Technology New Taipei City 243303 Taiwan. govindasamy420700@***. Department of Research and Innovation Saveetha School of Engineering SIMATS 602105 Chennai India. govindasamy420700@***.

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Assessment of circulating extracellular vesicles from calorie-restricted mice and humans in ischaemic injury models

Journal of Extracellular Biology

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Journal of Extracellular Biology 2023年第5期2卷 e86页

作者： Jaimes, Manuel S. V. Liao, Chia-Te Chen, Max M. Czosseck, Andreas Lee, Tsung-Lin Chou, Yu-Hsiang Chen, Yung-Ming Lin, Shuei-Liong Lai, James J. Lundy, David J. Graduate Institute of Biomedical Materials & Tissue Engineering Taipei Medical University Taipei Taiwan Division of Nephrology Department of Internal Medicine Shuang Ho Hospital Taipei Medical University New Taipei Taiwan Division of Nephrology Department of Internal Medicine School of Medicine College of Medicine Taipei Medical University Taipei Taiwan TMU Research Center of Urology and Kidney (TMU-RCUK) Taipei Medical University Taipei Taiwan Division of Nephrology Department of Internal Medicine National Taiwan University Hospital College of Medicine National Taiwan University Taipei Taiwan Graduate Institute of Physiology College of Medicine National Taiwan University Taipei Taiwan Department of Bioengineering University of Washington Seattle WA United States Department of Materials Science and Engineering National Taiwan University of Science and Technology Taipei Taiwan International PhD Program in Biomedical Engineering Taipei Medical University Taipei Taiwan Center for Cell Therapy Taipei Medical University Hospital Taipei Taiwan

Calorie restriction (CR) and fasting affect lifespan, disease susceptibility and response to acute injury across multiple animal models, including ischaemic injuries such as myocardial infarction or kidney hypoxia. The cargo and function of circulating extracellular vesicles (EV) respond to changes in host physiology, including exercise, injury, and other interventions. Thus, we hypothesised that EVs induced following CR may reflect some of the beneficial properties of CR itself. In a pilot study, EVs were isolated from mice following 21 days of 30 % CR, and from eight human donors after 72 h water-only fasting. EV size, concentration and morphology were profiled by NTA, western blot and cryoEM, and their function was assessed using multiple assays related to ischaemic diseases. We found that EVs from post-fasting samples better protected cardiac cells from hypoxia/reperfusion (H/R) injury compared to pre-fasting EVs. However, there was no difference when used to treat H/R-injured kidney epithelial cells. Post-fasting derived EVs slowed the rate of fibroblast migration and slightly reduced macrophage inflammatory gene expression compared to pre-fasting derived EVs. Lastly, we compared miRNA cargos of pre- and post-fasting human serum EVs and found significant changes in a small number of miRNAs. We conclude that fasting appears to influence EV cargo and function, with varied effects worthy of further exploration. © 2023 The Authors. Journal of Extracellular Biology published by Wiley Periodicals, LLC on behalf of the international Society for Extracellular Vesicles.

关键词： calorie restriction cardiomyocyte diet extracellular vesicle fasting hypoxia ketone macrophage microRNA serum

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Tailored nanoarchitectonics of PPy/g-C 3 N 4 /MnO 2 hybrid on NiCo LDH for enhanced energy storage in supercapacitors

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FlatChem 2025年 52卷

作者： Hariprasath Rangaraju Priyadharshini Matheswaran Pin-Yi Chen Nirmal Kumar Sakthivel Krishnamoorthy Shanmugaraj Pazhanivel Thangavelu Mani Govindasamy Department of Physics Periyar University Salem 636011 India Research Center for intelligent Medical Devices Ming Chi University of Technology New Taipei City 243303 Taiwan Institut de Recherche Dupuy de Lôme UMR CNRS 6027 Lorient 56100 France International Ph.D. Program in Innovative Technology of Biomedical Engineering and Medical Devices Ming Chi University of Technology New Taipei City 243303 Taiwan Department of Mechanical Engineering Ming Chi University of Technology Taoyuan City 234303 Taiwan Departamento de Química Facultad de Ciencias Universidad de Tarapacá Avda. General Velásquez 1775 Arica Chile

The growing demand for efficient energy storage devices holding high specific energy has accelerated the search for advanced electrode materials. Transition metal-based layered double hydroxides (LDHs), particularly those containing nickel (Ni) and cobalt (Co), have emerged as promising candidates due to their tunable layered structure and chemical composition. In this study, LDH and its hybrids were prepared using a simple hydrothermal technique. In addition, X-ray diffraction (XRD) measurements approve the presence of H 2 O molecules and carbonate anions in the interlamellar space due to their extended interlayer spacing. The quaternary NiCo LDH/manganese dioxide (MnO₂)/polypyrrole (PPy)/graphitic carbon nitride (g-C₃N₄) hybrid nanocomposite exhibits a specific capacitance of 2389 F/g at 1 A/g, with 88 % retention after 5000 cycles at a higher current density of 10 A/g. The superior electrochemical performance is accredited to reduced aggregation and enhanced electronic conductivity. Charge storage kinetics were analysed using Dunn's method and power law, reveals increased diffusive contribution in the quaternary nanocomposite. A hybrid supercapacitor device was fabricated using quaternary hybrid as cathode and activated carbon (AC) as anode delivers a high specific capacitance of 260 F/g at 1 A/g, with 95 % cyclic stability after 10,000 cycles. The assembled device achieves a specific energy of 82 Wh/kg at a specific power of 750 W/kg and a coulombic efficiency of 99 %, demonstrating excellent potential for energy storage applications.

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Co-MOF-67/carbon black composite: A novel electrochemical platform for furazolidone detection for food analysis

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Food Chemistry 2025年 489卷 145023页

作者： Selvam, Arunkumar Gopika, Meenakumari Gopakumar Kuo, Chih-Yu Saraswathyamma, Beena Yusuf, Kareem Govindasamy, Mani National Taipei University of Technology Taipei10608 Taiwan Department of Chemical Engineering and Biotechnology National Taipei University of Technology Taipei10608 Taiwan Department of Chemistry Amrita Vishwa Vidyapeetham Amritapuri campus Clappana P O Kerala Kollam690525 India High-Value Biomaterials Research and Commercialization Center National Taipei University of Technology Taipei106 Taiwan Department of Chemistry College of Science King Saud University Riyadh11451 Saudi Arabia International Ph.D. Program in Innovative Technology of Biomedical Engineering and Medical Devices Ming Chi University of Technology New Taipei City243303 Taiwan Research Center for Intelligent Medical Devices Ming Chi University of Technology New Taipei City243303 Taiwan Department of Chemistry Korea University Seoul Seongbuk-gu Korea Republic of

Furazolidone (FZD), a nitrofuran antibiotic used for the treatment of bacterial and protozoal illnesses, generates apprehensions about its potential toxicity and mutagenicity. The swift and dependable identification of FZD in food and biological specimens is essential for public health and regulatory adherence. This study presents a novel electrochemical sensor using a glassy carbon electrode (GCE) modified with a cobalt-based metal-organic framework (Co-MOF) and carbon black (CB) composite (Co-MOF@CB/GCE) for the sensitive detection of FZD. The Co-MOF@CB composite enhances electron transport and expands the electroactive surface area. Characterization investigations confirmed the successful fabrication of the Co-MOF@CB/GCE sensor. Electrochemical analyses revealed an extensive detection range (0.4–610 μmolL−1) and a minimal detection limit (0.0875 μmolL−1). The sensor exhibited great repeatability, stability, and selectivity, demonstrating efficient FZD detection in milk, honey, and chicken. This sensor provides a reliable, economical tool for FZD detection in regulatory and public health contexts. © 2025 Elsevier Ltd

关键词： Diseases

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Electrochemical sensor based on ZnO@MWCNT/ glassy carbon electrode for the detection of warfarin (blood anticoagulant)

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Surfaces and Interfaces 2025年 67卷

作者： Manjunath, Kumbar Mudakappa Yemmi, Rajeshwari Swamy, B.E. Kumara Eldesoky, Gaber E. Govindasamy, Mani Division of Plant Breeding and Genetics Central Coffee Research Institute Karnataka Chikkamagaluru 577117 India Department of Industrial Chemistry Kuvempu University Karnataka Shivamogga India Department of Chemistry College of Science King Saud University P. O. Box 2455 Riyadh 11451 Saudi Arabia International Ph.D. Program in Innovative Technology of Biomedical Engineering and Medical Devices Ming Chi University of Technology New Taipei City 243303 Taiwan Centre for Applied Research Saveetha School of Engineering Saveetha Institute of Medical and Technical Sciences (SIMATS) Tamil Nadu Chennai 602105 India Research Center for Intelligence Medical Devices Ming Chi University of Technology New Taipei City 243303 Taiwan Department of Chemistry Korea University Seoul Seongbuk-gu South Korea

This study employed ZnO nanoparticles, multi-walled carbon nanotubes (MWCNTs), and a modified glassy carbon electrode (GCE) as a quick and sensitive method for detecting warfarin at biological pH levels. The ultrasonication technique was utilized in the synthesis of the ZnO@MWCNTs nanocomposite. The ZnO@MWCNTs were characterized using Transmission electron microscopy (TEM), Scanning electron microscopy (SEM), X-ray diffraction (XRD), spectroscopy, analytical techniques, and electrochemical impedance spectroscopy (EIS). Cyclic voltammetry (CV) as well as differential pulse voltammetry (DPV) techniques are employed in the presence of PBS buffer as an electrolyte. We observed unique oxidative peak currents an indication of the electrochemical mechanism of warfarin at low potentials for ZnO @MWCNTs/GCE. Moreover, we successfully attained effective electrochemical detection of warfarin utilizing the proposed sensor, which exhibited an excellent low limit of detection (LOD) of 0.0188 μM across a linear range of 0.02–2867.37 μM. The proposed sensor exhibits excellent storage stability, repeatability, and reproducibility, and has been effectively utilized for the quantification of warfarin in real samples, including blood serum and urine as obtained good recovery and RSD value. © 2025 Elsevier B.V.

关键词： Differential pulse voltammetry Glassy carbon electrode Multiwalled carbon nanotubes Warfarin ZnO nanoparticles

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Highly efficient capture of E. coli using amidoximated polyacrylonitrile nanofiber membrane immobilized with reactive green 19 dye/polyhexamethylene biguanide: Antibacterial and cytotoxicity studies

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Separation and Purification technology 2024年 338卷

作者： Quang-Vinh Le Bing-Lan Liu Penjit Srinophakun Jeng-Ywan Shih Chi-Yun Wang Chen‑Yaw Chiu Shen-Long Tsai Kuei-Hsiang Chen Yu-Kaung Chang Department of Chemical Engineering National Taiwan University of Science and Technology Taipei City 10607 Taiwan Department of Applied Chemistry Chaoyang University of Technology Taichung 413310 Taiwan Department of Chemical Engineering Kasetsart University 50 Ngamwongwan Road Chatuchak Bangkok 10900 Thailand Department of Chemical Engineering Ming Chi University of Technology New Taipei City 243303 Taiwan International Ph.D. Program in Innovative Technology of Biomedical Engineering and Medical Devices Ming Chi University of Technology New Taipei City 243303 Taiwan Bone and Joint Research Centre Chang Gung Memorial Hospital Taoyuan City 333423 Taiwan Department of Chemical Engineering and Materials Science Yuan Ze University Zhongli Dist. Taoyuan City 320315 Taiwan

In this study, we synthesized an amidoximated polyacrylonitrile nanofiber membrane (P-Oxime). Subsequently, we grafted reactive green 19 (RG19) dye onto its surface, resulting in the formation of the P-Oxime-RG19 membrane. Further enhancement was achieved by physically attaching poly(hexamethylene biguanide) hydrochloride (PHMB) to the P-Oxime-RG19 membrane, leading to the formation of the P-Oxime-RG19-PHMB membrane. Extensive characterization of the nanofiber membranes was conducted, focusing on crucial physical and mechanical properties such as functional group content, morphology, and thermostability. The optimization of various modification conditions, including initial dye and PHMB concentrations, duration, temperature, and nitrile group conversion to oxime concentrations, played a pivotal role in achieving superior antibacterial performance in P-Oxime-RG19-PHMB nanofiber membranes. In-depth analyses involved the application of kinetic and equilibrium thermodynamic models to unravel the modification processes of RG19 dye and PHMB in the nanofiber membranes. Under the carefully tuned optimal modification conditions, the P-Oxime-RG19-PHMB nanofiber membrane exhibited remarkable antibacterial efficacy, achieving nearly 100% disinfection of E. coli . In addition to exploring its antimicrobial capabilities, we thoroughly examined the repeatability and biocompatibility of the nanofiber membranes. The results indicated not only the P-Oxime-RG19-PHMB nanofiber membrane was a highly promising antibacterial material but also highlighted its potential for diverse applications, particularly in food and textile fabrication, owing to its exceptional performance and suitability.

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Time synchronization between parietal–frontocentral connectivity with MRCP and gait in post-stroke bipedal tasks

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Journal of Neuroengineering and Rehabilitation 2024年第1期21卷 101页

作者： Phang, Chun-Ren Su, Kai-Hsiang Cheng, Yuan-Yang Chen, Chia-Hsin Ko, Li-Wei International Ph.D. Program in Interdisciplinary Neuroscience (UST) College of Biological Science and Technology National Yang Ming Chiao Tung University Hsinchu Taiwan Center for Intelligent Drug Systems and Smart Bio-devices (IDS2B) College of Biological Science and Technology National Yang Ming Chiao Tung University Hsinchu Taiwan Department of Biological Science and Technology College of Biological Science and Technology National Yang Ming Chiao Tung University Hsinchu Taiwan Department of Physical Medicine and Rehabilitation Taichung Veterans General Hospital Taichung Taiwan Department of Post-Baccalaureate Medicine College of Medicine National Chung Hsing University Taichung Taiwan School of Medicine National Yang Ming Chiao Tung University Taipei Taiwan Department of Physical Medicine and Rehabilitation Kaohsiung Medical University Hospital Kaohsiung Taiwan School of Medicine College of Medicine Kaohsiung Medical University Kaohsiung Taiwan Regenerative Medicine and Cell Therapy Research Center Kaohsiung Medical University Kaohsiung Taiwan Institute of Electrical and Control Engineering National Yang Ming Chiao Tung University Hsinchu Taiwan Department of Biomedical Science and Environment Biology Kaohsiung Medical University Kaohsiung Taiwan Drug Development and Value Creation Research Center Kaohsiung Medical University Kaohsiung Taiwan

Background: In post-stroke rehabilitation, functional connectivity (FC), motor-related cortical potential (MRCP), and gait activities are common measures related to recovery outcomes. However, the interrelationship between FC, MRCP, gait activities, and bipedal distinguishability have yet to be investigated. Methods: Ten participants were equipped with EEG devices and inertial measurement units (IMUs) while performing lower limb motor preparation (MP) and motor execution (ME) tasks. MRCP, FCs, and bipedal distinguishability were extracted from the EEG signals, while the change in knee degree during the ME phase was calculated from the gait data. FCs were analyzed with pairwise Pearson’s correlation, and the brain-wide FC was fed into support vector machine (SVM) for bipedal classification. Results: Parietal–frontocentral connectivity (PFCC) dysconnection and MRCP desynchronization were related to the MP and ME phases, respectively. Hemiplegic limb movement exhibited higher PFCC strength than nonhemiplegic limb movement. Bipedal classification had a short-lived peak of 75.1% in the pre-movement phase. These results contribute to a better understanding of the neurophysiological functions during motor tasks, with respect to localized MRCP and nonlocalized FC activities. The difference in PFCCs between both limbs could be a marker to understand the motor function of the brain of post-stroke patients. Conclusions: In this study, we discovered that PFCCs are temporally dependent on lower limb gait movement and MRCP. The PFCCs are also related to the lower limb motor performance of post-stroke patients. The detection of motor intentions allows the development of bipedal brain-controlled exoskeletons for lower limb active rehabilitation. © The Author(s) 2024.

关键词： Brain–computer interface Functional connectivity Motor execution Motor preparation Post-stroke

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Correction to: Biological synthesis and characterization of iron oxide (FeO) nanoparticles using Pleurotus citrinopileatus extract and its biomedical applications

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Biomass Conversion and Biorefinery 2023年第11期14卷 12587-12587页

作者： Manimaran, Kumar Yanto, Dede Heri Yuli Govindasamy, Mani Karunanithi, Bogeshwaran Alasmary, Fatmah Ali Habab, Reem Abdulrahman Research Center for Applied Microbiology National Research and Innovation Agency (BRIN) Cibinong Republic of Indonesia Department of Product Development Institute of Biotechnology Saveetha School of Engineering Saveetha Institute of Medical and Technical Sciences (SIMATS) Chennai India Faculty International Ph.D. Program in Innovative Technology of Biomedical Engineering and Medical Devices Ming Chi University of Technology New Taipei City Taiwan Korea University Seongbuk-gu Republic of Korea Department of Research and Innovation Saveetha School of Engineering SIMATS Thandalam India Department of Petroleum Engineering Dhaanish Ahmed College of Engineering Chennai India Department of Chemistry College of Science King Saud University Riyadh Saudi Arabia

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