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Ponnusamy Kanchana Venkatesan Hemapriya Natarajan Arunadevi Sankaran Shanmuga Sundari Ill-Min Chung Mayakrishnan Prabakaran 《印度化学会志》2022,99(10):100679
Green synthesis of nanoparticles by eco-friendly methods is a recent technique which draws the attention of researchers because of the reward over many conventional chemical methods. The present work focuses on aqueous Limonia acidissima leaf extract in synthesizing silver nanoparticles and its applications in a simple way. The silver nanoparticles formed were characterized by Infrared, Ultra violet-visible, X-ray diffraction, transmission electron microscopic, and atomic force microscopic techniques. The powder X-ray diffraction studies and transmission electron microscopic images reveal that the silver nanoparticles synthesized were approximately 10–40 nm and have a spherical structure. The nanoparticles were assayed for their antibacterial, antifungal and antioxidant activity. The antimicrobial studies for the silver nanoparticles show a maximum zone of inhibition of 8.8 mm for Bacillus subtilis bacteria and 8.5 mm for Candida albicans fungi at 3 and 1 μg/mL respectively. In-silico ADMET studies reveal that the toxicity, bioactivity, pharmacokinetics and drug-likeness properties of Limonia acidissima leaf extract is good. The molecular docking studies show that the microbial activity is high for Bacillus subtilis and Candida albicans showing the coincidence of the in silico and in vitro studies as expected. The free radical scavenging activity of nanoparticles is 80 for 100 μg/mL. The 50% of inhibition of silver nanoparticles against human breast cancer cell lines is 18 μg/mL. It is evident that silver nanoparticles would be helpful in treating cancer cell lines and have great perspectives in the biomedical sector. 相似文献
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Gopiraman Mayakrishnan Saravanamoorthy Somasundaram Chung Ill-Min 《Research on Chemical Intermediates》2017,43(10):5601-5614
Research on Chemical Intermediates - Highly efficient nanocomposites (Ag/HHP and Ru/HHP) of Ag and Ru nanoparticles (NPs) supported on human hair powder (HHP) were prepared for reduction of... 相似文献
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M. Muneeswaran P. Jegatheesan M. Gopiraman Ick-Soo Kim N. V. Giridharan 《Applied Physics A: Materials Science & Processing》2014,114(3):853-859
A soft chemical coprecipitation method has been proposed for synthesis of nano-sized multiferroic BiFeO3 (BFO) powders. The X-ray diffraction pattern confirms the perovskite structure of BFO and Rietveld refinement reveals the existence of rhombohedral R3c symmetry. Crystallite size and strain value are studied from Williamson–Hall (W–H) analysis. The transmission electron microscope (TEM) image shows that the particle size of BFO powders lies between 50–100 nm. 4A1 and 7E Raman modes have been observed in the range 100–650 cm?1 and a prominent band centered around 1150–1450 cm?1 have also been observed corresponding to the two-phonon scattering. Differential Thermal Analysis (DTA) shows the existence of two prominent peaks at 330 °C and 837 °C corresponding to the magnetic and ferroelectric ordering, respectively. From the temperature dependent dielectric studies, an anomaly in the dielectric constant is observed at the vicinity of Neel temperature (T N ) indicating a magnetic ordering. Also, BFO shows antiferromagnetic behavior measured from the magnetic studies. 相似文献
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Gopiraman Mayakrishnan Sakunthala Pitchai Kanmani Raman Alex Ramani Vincent Sulochana Nagarajan 《Ionics》2011,17(9):843-852
The inhibitive action of Clematis gouriana (CG) on mild steel (MS) corrosion in 1.0 M HCl solution was studied. Inhibition efficiency of CG was carried out by using
various weight loss methods, potentiodynamic polarisation, and electrochemical impedance spectroscopy. Inhibition efficiencies
of up to 95.70% for CG can be obtained. Adsorption of CG on the MS surface was found to obey the Langmuir adsorption isotherm.
Free energy of adsorption calculated from the temperature studies revealed the possibility of both chemisorptions and physisorption.
The adsorbed film on the MS surface containing the CG inhibitor was also characterized by Fourier transform infrared spectroscopy
(FTIR) and scanning electron microscope and energy-dispersive spectrum. The possible active ingredient responsible for the
anticorrosion effect is identified as aporphine alkaloid which is isolated and screened for the anticorrosion effect using
electrochemical studies. The possible mode of corrosion inhibition of aporphine alkaloid is also derived using FTIR studies. 相似文献
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Ganesan Ayyannan Kuppusamy Karthikeyan Shanmuga Sundaram Vivekananthan Mayakrishnan Gopiraman Arumugam Rathinavelu 《Ionics》2013,19(6):919-932
The corrosion inhibitive effect of 3-(3-oxo-3-phenyl-propenyl)-1H-quinolin-2-one (PPQ) and 3-(3-oxo-3-phenyl-propenyl)-1H-benzoquinolin-2-one (PPBQ) on high carbon steel (HCS) in 10 % HCl media was evaluated by chemical (weight loss) and electrochemical (electrochemical impedance spectroscopy and potentiodynamic polarization technique) measurements. The inhibition efficiencies obtained from weight loss and electrochemical measurements were in good agreement. The inhibition efficiency was found to increase with the increase in inhibitor concentration but decreased with rise in temperature. Potentiodynamic polarization studies revealed the mixed mode inhibition of inhibitors. The adsorption behavior of these inhibitors on the HCS surface was found to obey the Langmuir adsorption isotherm. The thermodynamic parameter values of free energy of adsorption (?G ads) and enthalpy of adsorption (?H ads) revealed that the inhibitor was adsorbed on the HCS surface via both chemisorption and physisorption mechanisms. The adsorption mechanism of inhibition was supported by spectroscopic techniques (UV–visible, FT-IR, and wide-angle X-ray diffraction), surface analysis (SEM–EDS), and adsorption isotherms. 相似文献
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