Sri Paramakalyani College

Alwarkurichi, India

Sri Paramakalyani College

Alwarkurichi, India
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Ariharan V.N.,Sri Paramakalyani College | Nagendra Prasad P.,Noorul Islam Center for Higher Education
Journal of Chemical and Pharmaceutical Research | Year: 2014

Maha Vilvam is a holly tree commonly found in the Sacred Groves from Kanyakumari to Kashmir in the foot hills and in plains which has many medicinal secrets. Vilva trees are the Sthalavirusham of the most of the Shiva temples in India. The Botanical Name of the Vilvam is Aegle marmelos(L.) Corr., which belongs to the Orange family Rutaceae. All the parts of the plant are used as an important medicine. Even though all the parts of the plants are useful, the leaves and fruits are mostly used as important drug in the ancient system of medicine to cure almost all the common ailments of the Human being. In this present study the qualitative phytochemical analysis of Aegle marmelos leaf extract was carried out and the results were discussed.


Selvi E.T.,Sri Paramakalyani College | Sundar S.M.,Sri Paramakalyani College
Applied Physics A: Materials Science and Processing | Year: 2017

This paper highlights on the consequence of replacing tetravalent Sn4+ ions of the SnO2 by divalent Zn2+ ions on their structural, optical, and magnetic properties. Samples of Sn1−xZnxO2 with x = 0, 0.01, 0.02, 0.03, and 0.04 were synthesized using microwave irradiated solvothermal process. The X-ray powder diffraction patterns reveal the rutile tetragonal phase of all doped SnO2 samples with no secondary phases. The transmission electron microscopy results show the formation of spherical nanoparticles of size 10–30 nm. Morphological changes were observed by scanning electron microscopy. The functional groups were investigated using Fourier transform infrared spectroscopy studies. Optical studies were carried by UV–Vis spectroscopy and fluorescence spectroscopy. Electron paramagnetic resonance was used to calculate the Lande splitting factor ‘g’. The magnetic properties using vibrating sample magnetometer exhibit room temperature ferromagnetism for all the samples. © 2017, Springer-Verlag Berlin Heidelberg.


Thamarai Selvi E.,Sri Paramakalyani College | Meenakshi Sundar S.,Sri Paramakalyani College
Journal of Materials Science: Materials in Electronics | Year: 2017

This paper highlights on the consequence of replacing tetravalent Sn4+ ions of the SnO2 by divalent Mn2+ ions on their structural, optical and magnetic properties. Samples of Sn1−xMnxO2 with x = 0.01, 0.02, 0.03 and 0.04 were synthesized using microwave irradiated solvothermal process. The X-ray powder diffraction patterns reveal the rutile tetragonal phase of all doped SnO2 samples with no secondary phases. The transmission electron microscopy results show the formation of spherical nanoparticles of size 10–16 nm. Morphological changes were observed by scanning electron microscopy. The functional groups were investigated using Fourier Transform Infrared Spectroscopy studies. Optical studies were carried by UV–Vis Spectroscopy and Fluorescence Spectroscopy. Electron Paramagnetic resonance was used to calculate the Lande splitting factor ‘g’. The magnetic properties were using Vibrating Sample Magnetometer. SnO2 with lower Mn doping shows ferromagnetism. © 2017 Springer Science+Business Media, LLC


Gomathy P.,National Engineering College | Sundar S.M.,Sri Paramakalyani College
Journal of Materials Science: Materials in Electronics | Year: 2017

Nickel doped Tin oxide nanoparticles Sn1−xNixO2 (x = 0, 0.01, 0.02, 0.03, 0.04) have been prepared by microwave-assisted chemical route method. The prepared sample is annealed at 500 °C for 1 h for the formation of SnO2 phase. Structural properties investigated by XRD studies indicate the formation of tetragonal phase for the SnO2 nanoparticles, and the Ni doping does not transform the tetragonal structure of SnO2. The scanning electron microscope image shows the surface morphology of the synthesized nanopowder. Transmission electron microscope results illustrate the formation of tetragonal shaped and small sized spherical nanoparticles of diameter 11–19 nm. Photoluminescence emission measurements at room temperature exhibit that all the samples demonstrate photoluminescence in the visible region. VSM studies reveal the ferromagnetic behaviour at room temperature for our sample due to oxygen vacancy. © 2017 Springer Science+Business Media, LLC


Vettumperumal R.,Sri Paramakalyani College | Kalyanaraman S.,Sri Paramakalyani College | Thangavel R.,Indian School of Mines
Journal of Molecular Structure | Year: 2014

Nanocrystals of Na-doped and Na, Mg codoped ZnO thin films were prepared by sol-gel spin coating method on glass substrate at different annealing temperatures. The deposited films were characterized by X-ray diffraction (XRD), Micro Raman, photoluminescence (PL) and UV-Visible measurements. The codoped films had hexagonal wurtzite structure and there were no peaks belonging to Na and Mg or its oxides observed from XRD. Surface morphology of the films was scrutinized by scanning electron microscope (SEM) and atomic force microscope (AFM) showing wrinkle structures that appeared on the film surface. Elemental compositions of the films were analysed using energy dispersive X-ray (EDX) spectra. The LO phonon modes were observed up to the fifth order and their enhancement was observed by the presence of Frohlich contribution. From μ-PL, the strong near band edge emission observed at 3.24 eV was blue shifted due to the band filling of free carriers. Fundamental absorption edge was observed at 370 nm and the optical band gap was decreased with respect to ZnO. Reduction of Urbach energy among codopants is small indicating less disorder. © 2013 Elsevier B.V.


Vettumperumal R.,Sri Paramakalyani College | Kalyanaraman S.,Sri Paramakalyani College | Thangavel R.,Indian School of Mines
Journal of Sol-Gel Science and Technology | Year: 2013

Nano crystalline cesium (Cs) doped ZnO thin films were deposited on glass substrate by sol gel spin coating method with 1-3 mol.% doping concentration and different annealing temperatures. The deposited films were characterized by X-ray diffraction (XRD), Hall Effect, Photoluminescence (PL) and UV-Visible studies. XRD measurements reveal that all the samples abound in the wurtzite structure with polycrystalline nature. An increase in crystalline size from 19.60 to 44.54 nm is observed with the increase of doping concentration. Electrical conductivity of Cs doped ZnO films were observed from Hall effect measurements and the maximum carrier concentration obtained is 7.35 × 1018 cm-3. The near band emission (384 nm) peak intensity increases with the increase of Cs doping concentration and a maximum intensity 55,280 was observed for CZ3 film from PL spectrum. Also a low energy near infrared (NIR) emission peak centered at 1.62 eV appears for the Cs doped ZnO films. The average transmission of CZ film is 88 % and the absorption edge is red shifted with the increase of Cs doping concentration and also the optical conductivity increases in the UV region. © 2013 Springer Science+Business Media New York.


Varadhaseshan R.,Sri Paramakalyani College | Meenakshi Sundar S.,Sri Paramakalyani College
Applied Surface Science | Year: 2012

Ni doped ZnO (Zn 1-xNi xO, in which 0.1 ≤ x ≤ 0.4) diluted magnetic semiconductor nanoparticles are prepared by microwave irradiated solvothermal process. The structural properties are studied using X-ray diffraction. It is evident from the XRD spectrum that the Ni doped ZnO nanocompounds exhibit single phase hexagonal wurtzite structure with strong c-axis orientation. To improve the crystalline quality the samples are annealed at 400 °C. The effects of annealing temperature and dopant concentration on the structural properties are also discussed. Unit cell expansion is clearly observed in Ni doped ZnO nanocrystals. The TEM images confirm that the particle size is 20 nm and the particles are well dispersed. The magnetic property of the nanocrystals was measured using vibrational sample magnetometer. According to the magnetization measurements ferromagnetic behavior was found in Zn 0.9Ni 0.1O combination. However, for the other higher dopant ratios paramagnetism is observed. © 2012 Elsevier B.V.


Vijayalakshmi S.,Sri Paramakalyani College | Kalyanaraman S.,Sri Paramakalyani College
Optical Materials | Year: 2013

The synthesis and non-linear optical properties of nitro aniline derived Schiff bases of 9-anthraldehyde were carried out. The compounds were characterized using FT-IR, Raman and UV-Vis spectroscopies. The FT-IR and Raman spectral data revealed the confirmation of Schiff bases with the absorption band assignable to the stretching of CN band. The charge transfer (CT) interaction between the donor and acceptor molecules were confirmed through λmax of the UV-Vis spectra. The UV-Vis analysis indicated, bathochromic shift in the compounds, implying a non-zero first order molecular hyperpolarizability (β) which are translated into macroscopic non-linearity χ2. To investigate the solid state macroscopic non-zero non-linear optical response, χ2, (second harmonic generation) the Kurtz and Perry method was used. This happens to be the first report on the non-linear optical analysis of these compounds. © 2012 Elsevier B.V. All rights reserved.


Vijayalakshmi S.,Sri Paramakalyani College | Kalyanaraman S.,Sri Paramakalyani College
Spectrochimica Acta - Part A: Molecular and Biomolecular Spectroscopy | Year: 2014

Fourier-Transform Infrared (FT-IR) spectroscopy supported by Raman spectroscopy has been employed to explain the conventional and unconventional hydrogen bonding present in the 4,4′thiodiphenol: hexamine and 4,4′sulfonyldiphenol: hexamine cocrystals. The possible internal and external vibrational modes are predicted through factor group analysis. Influence of intra molecular charge transfer (ICT) interaction caused by the strong ionic ground state hydrogen bonding between charged species, giving rise to a non centro symmetric structure which is a criterion for second harmonic generation (SHG) efficiency has been discussed. Intense low wave number hydrogen bond vibrations in Raman which arise due to electron-phonon coupling are analyzed. Optical quality of adducts is identified through UV-Vis analysis. The second harmonic generation efficiency of both adducts is determined by Kurtz-Perry method. © 2013 Elsevier B.V. All rights reserved.


Suresh Kumar M.,Sri Paramakalyani College | Ranjit Singh A.J.A.,Sri Paramakalyani College | Alagumuthu G.,Sri Paramakalyani College
Indian Journal of Traditional Knowledge | Year: 2012

In India honey bees like Apis cerana and Apis mellifera are reared for commercial purpose. The other bees like rock bee (Apis dorsata), little bee (Apis florea) and dammer bee (Trigona sp) are not domesticated because of their ecophysiology. However, the kani tribes living in Karayar area of Kalakad-Mundanthurai Tiger Reserve area (KMTR) of Western Ghats have developed a novel method of rearing the dammer bees. The objective of the study is to understand the traditional skill of Kani tribes to rear the stingless bee (Trigona sp.) which was not used for regular bee keeping. The present study also gives importance to evolve commercial strategies to get honey (medicinal honey) from Trigona sp. The findings of the present study will help to preserve the art of rearing stingless bees and to introduce modern techniques to harvest pure, clean and uncontaminated honey by suitable modifications in the indigenous practice of stingless bee rearing. The honey produced by dammer bees is a panacea for much human illness. The Kani tribes have developed a bamboo pole bee hive to keep this stingless bee belonged to the species Trigona irredipensis. The dammer bees build an interesting type of comb made of propolis, mud and about 600-700gm honey is collected per year per hive. Because of rich medicinal value the honey collected from this beehive is sold at a rate of Rs.1000/Kg.

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