Arumugam Pillai Seethai Ammal College

Tiruppattur, India

Arumugam Pillai Seethai Ammal College

Tiruppattur, India

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Kannan Y.B.,Arumugam Pillai Seethai Ammal College | Saravanan R.,The Madura College | Srinivasan N.,Thiagarajar College of Engineering | Ismail I.,University Putra Malaysia
Journal of Magnetism and Magnetic Materials | Year: 2017

Ni0.5Zn0.5Fe2O4 nano ferrite particles have been prepared by mechanical alloying via high energy ball milling and sintered at different temperatures from 700 °C to 1000 °C. Spinel structure is confirmed from the analysis of XRD data. Rietveld refinement method is employed to refine the XRD powder data and the structural parameters are calculated from the refinement. Small amount of hematite phase is found in all samples. The SEM, EDAX and XRF analysis reveals respectively the morphology, stoichiometric composition and purity of the powder samples. Using Maximum Entropy Method (MEM) the values of the bond strength between various sites interactions in ferrites are evaluated and compared with theoretical predictions of strengthening/weakening of various sites interactions from the values of interionic distances and interionic bond angles. Ferromagnetic nature of the samples is confirmed from the vibrating sample magnetometer study. The obtained low saturation magnetization values are attributed to presence of second phase. The optical band gap energy of the samples was determined by using UV–VIS techniques. © 2016 Elsevier B.V.

Sekar D.,Narayana Medical College and Hospital | Sekar D.,Cryovault Biotech India Pvt Ltd | Krishnan R.,Narayana Medical College and Hospital | Sivakumar P.,Arumugam Pillai Seethai Ammal College | And 2 more authors.
Genes and Diseases | Year: 2016

Irrespective of positive developments of cancer treatment, the mortality due to various cancers remains high and the mechanisms of cancer initiation and the development also remains mysterious. As we know that microRNAs are considered to be a short noncoding RNA molecules consisting of 21-25 nucleotides (nt) in length and they silence their target genes by inhibiting mRNA translation or degrading the mRNA molecules by binding to their 3'-untranslated (UTR) region and play a very important role in cancer biology. Recent evidences indicate that miR-21 is over expressed in cancer stem cells and plays a vital role in cell proliferation, apoptosis, and invasion. Even though an increased expression level of miR-21 has been observed in cancer stem cells, studies related to the role of miR-21 in cancer stem cells are limited. The main aim of this mini review is to explain the potency of miR-21 in various cancer stem cells (CSCs) and as a new target for therapeutic interventions of cancer progression. © 2016 Chongqing Medical University.

Marikkannu S.,Arumugam Pillai Seethai Ammal College | Kashif M.,University Malaysia Perlis | Sethupathy N.,Arignar Anna Government Arts College | Piraman S.,Alagappa University | And 4 more authors.
Materials Science in Semiconductor Processing | Year: 2014

This study focused on the effect of substrate temperature (350°C, 400°C, and 450°C) on morphological, optical, and electrical properties of indium tin oxide (ITO) films deposited onto porous silicon/sodalime glass substrates through jet nebulizer spray pyrolysis for use in heterojunction solar cells. X-ray diffraction analysis confirmed the formation of pure and single-phase In2O3 for all the deposited films whose crystallinity was enhanced with increasing substrate temperature, as shown by the increasing (222) peak intensity. Morphological observations were conducted using scanning electron microscopy to reveal the formation of continuous dense films composed of nanograins. The UV-vis spectra revealed that the transmittance increased with increasing substrate temperature, reaching a value of over 80% at 450°C. The photoelectric performance of the solar cell was studied using the I-V curve by illuminating the cell at 100 mW/cm2. A high efficiency (η) of 3.325% with Isc and Voc values of 14.8 mA/cm2 and 0.60 V, respectively, was attained by the ITO solar cell annealed at 450°C. © 2014 Elsevier Ltd. All rights reserved.

Ramya S.S.,Sri Sarada Niketan College for Women Amaravathipudur | Vijayanand N.,Arumugam Pillai Seethai Ammal College | Rathinavel S.,Center for Research in Botany
International Journal of Recycling of Organic Waste in Agriculture | Year: 2015

Background: Seaweed extracts are used as nutrient supplements, biostimulants and or biofertilizers as an alternative to chemical fertilizers in agriculture. The study was set up to evaluate the biofertilizing efficiency of liquid extracts of brown marine alga Stoechospermum marginatum on growth, biochemical and yield of brinjal, a vegetable crop. To achieve the objectives, liquid extracts at different concentrations were prepared and applied as foliar spray on the brinjal seedlings raised in experimental pots maintained under natural conditions. Results: After 30 and 180 days, the growth and biochemical parameters and yield attributes were monitored, respectively. The results exhibited that shoot and root length, total fresh and dry weight, leaf area and the content of moisture, photosynthetic pigments, protein, amino acids, reducing sugar, ascorbic acid and nitrate reductase activity were found to be enhanced in the leaves of brinjal plants which received 1.5 % of Stoechospermum marginatum extracts. Similarly, number of fruits and fruit weight were also increased at lower concentration only (1.5 %). In contrast, liquid extracts at high concentration (5 %) was found to have inhibitory effect on brinjal plants as compared to the control sprayed with water. Conclusions: The study evidence that lower concentrations were found to show promoting effect on growth and productivity of brinjal plants. The fertilizing efficiency of liquid extracts of testing marine alga might me due to the presence of micro and macro nutrients, growth hormones and vitamins at preferential levels. It can be concluded that seaweed extracts could be used as eco-friendly liquid biofertilizer to substitute chemical fertilizer and also play a pivotal role in organic farming practices toward sustainable agriculture. © 2015, The Author(s).

PubMed | ADVANCE Medical and Arumugam Pillai Seethai Ammal College
Type: | Journal: Hypertension research : official journal of the Japanese Society of Hypertension | Year: 2016

Hypertension (HTN) is one of the most common emerging disease in developing countries. It alters endothelial cell structure and function, resulting in several diseases, such as cardiovascular disease, peripheral vasculopathy, cerebrovascular disease and nephropathy. Although much progress has been made in researching HTN in recent years, early diagnosis and treatment of HTN are not yet satisfactory, and progression control/treatment is still poor. MicroRNAs are well-known regulators of the physiological and developmental processes of HTN. Our results revealed that miR-510 was upregulated in blood samples from HTN patients, whereas no significant differences were observed in the control samples. Methylation analyses corroborated the miR-510 upregulation in patient samples. These results suggested that miR-510 can be used as a novel biomarker for diagnosis and as a new therapeutic target for HTN.Hypertension Research advance online publication, 24 November 2016; doi:10.1038/hr.2016.147.

Nagaraj S.,University of Madras | Arulmurugan P.,University of Madras | Karuppasamy K.,Madurai Kamaraj University | Jayappriyan K.R.,University of Madras | And 3 more authors.
Academic Journal of Cancer Research | Year: 2011

The efficacy of C-phycocyanin obtained from Arthrospira maxima SAG 25780 was evaluated on the levels of lipid peroxidation and antioxidant parameters as well as histopathological and immunohistochemical assessment in carbon tetrachloride (CCl 4) induced liver damage in the male Wistar albino rats. The rats were 4 injected by CCl intraperitoneal (50% CCl 4, 0.5 mg/kg body weight) that led to a marked increase in oxidative 4 4 stress indicated by alterations in lipid peroxidation, enzymic and non-enzymic antioxidants. Treatment with Cphycocyanin (75 mg/kg body weight) restored the above mentioned alterations towards normalcy, highlighting the antioxidant potential of C-phycocyanin in mitigating the oxidative stress mediated damage produced during CCl 4 induced male rats. The liver damage was further confirmed by histopathological and immunohistochemical 4 studies. In the present investigation, strongly suggested that the C-phycocyanin protects CCl 4 induced 4 hepatotoxicity in Wistar rats. © IDOSI Publications, 2011.

Ravikumar M.,Arumugam Pillai Seethai Ammal College | Valanarasu S.,Arul Anandar College | Chandramohan R.,Sree Sevugan Annamalai College | Jacob S.S.K.,Arul Anandar College | Kathalingam A.,Dongguk University
Journal of Electronic Materials | Year: 2015

CdO thin films were deposited on glass and silicon substrates by simple perfume atomizer at 350°C using cadmium acetate and trisodium citrate (TSC). The effect of the TSC concentration on the structural, morphological, optical, and photoconductive properties of the prepared CdO thin films was investigated. X-Ray diffraction (XRD) studies of the deposited films revealed improvement in crystalline nature with increase of TSC concentration. Films prepared without TSC showed porous nature, not fully covering the substrate, whereas films prepared using TSC exhibited full coverage of the substrate with uniform particles. Optical transmittance study of the films showed high transmittance (50% to 60%), and the absorption edge was found to shift towards the red region depending on the TSC concentration. The films exhibited a direct band-to-band transition with bandgap varying between 2.31 eV and 2.12 eV. Photoconductivity studies of the n-CdO/p-Si structure for various TSC concentrations were also carried out. I–V characteristics of this n-CdO/p-Si structure revealed the formation of rectifying junctions, and its photoconductivity was found to increase with the TSC concentration. © 2015, The Minerals, Metals & Materials Society.

Premarani R.,Arumugam Pillai Seethai Ammal College | Jebaraj Devadasan J.,Popes College | Saravanakumar S.,Sree Sevugan Annamalai College | Chandramohan R.,Sree Sevugan Annamalai College | Mahalingam T.,Ajou University
Journal of Materials Science: Materials in Electronics | Year: 2015

Room-temperature ferromagnetic behavior of undoped cadmium sulphide (CdS) and Ni-doped CdS thinfilms prepared by chemical bath deposition technique is reported. The crystallite sizes of the thinfilms have been characterized by X-ray diffraction pattern. The particle sizes increase from 11 to 40 nm with the increase of Ni content in the CdS thinfilms. scanning electron microscope results indicated that CdS thinfilms is made up of aggregate of spherical-like particles. The composition was estimated by Energy dispersive analysis of X-ray and reported. Spectroscopic studies revealed considerable improvement in transmission and the band gap of the films decreased from 2.62 to 2.28 eV with addition of Ni dopant that is associated with variation in crystallite sizes in the nano regime. Magnetization measurements indicate that the Ni doped CdS thinfilms exhibited ferromagnetism and the saturation magnetization decreases with the increase of crystal sizes in the Ni doped CdS nano thinfilms. This finding in CdS thinfilms should be focus of the future electronic and spintronics devices. © 2014, Springer Science+Business Media New York.

Saravanan R.,The Madura College | Kannan Y.B.,Arumugam Pillai Seethai Ammal College | Srinivasan N.,Thiagarajar College of Engineering | Ismail I.,University Putra Malaysia
Journal of Superconductivity and Novel Magnetism | Year: 2016

In this article, numerical values of the bond strength between tetrahedral-tetrahedral, octahedral-octahedral, and tetrahedral-octahedral site interactions in ferrites are evaluated by using maximum entropy method (MEM) and compared with that of existing theoretical predictions for the Ni0.5Zn0.5Fe2O4 nanoferrite particles prepared by mechanical alloying via high-energy ball milling and sintered at different temperatures from 1100 to 1400 ∘C. Interestingly, octahedral-octahedral site interactions are found to have the weakest interaction in all the samples. The structural parameters of the prepared sample have been studied by employing the Rietveld refinement method, using JANA 2006 software. The magnetic properties and the optical band gap energy of the samples are determined using vibrating sample magnetometer and UV-VIS technique respectively. © 2016 Springer Science+Business Media New York

Marikkannu S.,Arumugam Pillai Seethai Ammal College | Sanjeeviraja C.,Alagappa Chettiar College of Engineering And Technology | Piraman S.,Alagappa University | Ayeshamariam A.,Khadir Mohideen College
Journal of Materials Science: Materials in Electronics | Year: 2015

In this study, tin-doped indium oxide (ITO) thin films were fabricated via jet-nebulized spray pyrolysis method. The structural, micro structural, and optical properties of the ITO thin films were investigated via X-ray diffraction (XRD), ultraviolet–visible spectroscopy, and scanning electron microscopy (SEM). The XRD patterns of the thin films indicated a preferred orientation along the (222) plane, which ensures the formation of a pure phase with a high degree of crystallinity. The PL analysis showed that the film has a high transmittance of 80 %. The SEM observations showed the formation of dense films with grain sizes in the range of 25–50 nm. The X-ray photoelectron spectroscopy results displayed the single valance state and chemical bonding state of In and Sn in indium tin oxide. The electrical resistivity of the ITO substantially changed with the incorporation of Sn into the In2O3 structure. When 10 wt% Sn was added as a dopant, the minimum resistivity was 0.10 Ω-m. © 2015, Springer Science+Business Media New York.

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