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Item DIFFERENT COORDINATION GEOMETRIES OF LIGHTER LANTHANATES DRIVEN BY THE SYMMETRY OF GUANIDINES AS CHARGE COMPENSATORS(Royal Society of Chemistry, 2019) Packiaraj, S; Kanchana, P; Pushpaveni, A; Puschmann, H; Govindarajan, STwo new related families of formula (GunH)3[Ln(tda)3] I and (AgunH)3[Ln(oda)3]·H2O II (Ln = La, Ce, Pr, Nd & Sm, H2tda = thiodiacetic acid, H2oda = oxydiacetic acid, GunH = guanidinium, AgunH = aminoguanidinium) have been successfully synthesized using a controlled process under oil-bath conditions (at 120 °C for a day) and characterized by various physico-chemical techniques. The structures have been solved for praseodymium and neodymium in I and for lanthanum in II, respectively, from X-ray diffraction data of single crystals. The isostructural complexes of (GunH)3[Pr(tda)3] and (GunH)3[Nd(tda)3] crystallize in the hexagonal crystal system with space group P[6 with combining macron]2c, while (AgunH)3[La(oda)3]·H2O has a triclinic symmetry with the P[1 with combining macron] space group. Generally, coordination number 6 (octahedral) and 4 (tetrahedral) structures are very rare except when bulky ligands are present. Typically, the thiodiacetate (O, S, O) and oxydiacetate (O, O, O) anions act as tridentate ligands to create monomeric structures. Surprisingly, for the first time, the thiodiacetate anion takes a somewhat rare bi-dentate (O, O) mode, leading to trigonal prismatic geometry around the metal ion even for a flexible ligand, whereas the oxydiacetate dianion (oda2−) acquires the usual nine coordinated distorted monocapped square anti-prismatic (MSAP) geometry. The simultaneous TG-DTA of type I complexes could not be recorded due to spurting, while the type II compounds show smooth and similar thermal behaviour on heating. The photo-luminescent properties of I and II have also been investigated at room temperature, which indicate that the emissions come from intra-ligand π–π* transitions.Item SENSITIVITY ENHANCEMENT OF SURFACE PLASMON RESONANCE SENSOR WITH 2D MATERIAL COVERED NOBLE AND MAGNETIC MATERIAL (NI)(Springer Link, 2019-01-01) Nisha, A; Maheswari, P; Anbarasan, P M; Rajesh, K B; Jaroszewicz, ZIn this paper, surface plasmon resonance (SPR) sensor on 2D materials such as MoS2 and graphene on Au and magnetic material Ni in Kretschmann configuration is analyzed using transfer matrix method. Here we noted that by sandwiching the MoS2 layer between the Au and Ni film and adding graphene over Ni film improved the sensitivity as high as 229°/RIU. We also noted that the sensitivity of the proposed sensor changes with the addition of no. of layers of graphene and MoS2. We expect that such a high sensitivity SPR sensor could find optional application in chemical examination, medical diagnostic and biological detections.Item IN SILICO APPROACH TOWARDS ANTIINFLAMMATION AND ANTICANCER STUDIES ON PHYTOCONSTITUENTS DERIVED FROM CISSUS QUADRANGULARIS(Asian Journal of Chemistry, 2019-01-31) Vidya, Edathil; Gopal, SelviEthanobotanical and traditional uses of plant Cissus quadrangularis has initiated the phytochemical investigation of the plant. The stem of the plant was subjected for successive solvent extraction with petroleum ether, ethyl acetate, chloroform and ethanol. The crude extract were column choromatographed. Among 20 constituents isolated ascorbic acid, quercetin, phytol and luteol were identified. Later those phytochemicals were subjected for molecular docking in Autodock 4.2 to examine their pharmacological activity. The results obtained showed that these compounds can be further carry over for in vivo analysis.Item A PERVASIVE STUDY ON APPLICATIONS AND TECHNOLOGIES OF INTERNET OF THINGS (IOT)(IAEME Publication, 2019-01) Manoj Kumar, S; Mahalakshmi, K; Xavier, PIn present era, the Internet of Things (IoT) continues to gain momentum rapidly. The Internet of Things has enormous applications in healthcare Industry from remote monitoring to smart sensor enabled medical device integration. IoT ensures many benefits in healthcare and has potential to improvement of patient outcomes, data management and security in hospital, quality treatment and more. IoT technology has huge impact on Healthcare to transform patient care and improve physician service efficiency. The present study has focused the applications and technologies of IoT in healthcare care sector and how far it benefits to healthcare stake holders.Item SYNTHESIS AND X-RAY STUDY OF DISPIRO 8-NITROQUINOLONE ANALOGUES AND THEIR CYTOTOXIC PROPERTIES AGAINST HUMAN CERVICAL CANCER HELA CELLS(Royal Society of Chemistry, 2019-01-22) Selvaraj, Shyamsivappan; Raju, Vivek; Arjunan, Saravanan; Thangaraj, Arasakumar; Gopalan, Subashini; Thangaraj, Suresh; Ramasamy, Shankar; Palathurai, Subramaniam MohanA series of unique dispiro analogues containing an oxindole pyrrolidine 8-nitroquinolone hybrid has been obtained through a one-pot three-component 1,3-dipolar cycloaddition of azomethine ylides generated in situ from the condensation of isatins and benzylamine with (E)-3-arylidene-2,3-dihydro-8-nitro-4-quinolones. The structures of the newly synthesized compounds were characterized by using different spectroscopic techniques and by X-ray diffraction studies of their regio- and stereochemistry. All the synthesized compounds were screened for in vitro cytotoxic activity against the human cervical cancer cell line HeLa. The compounds have exhibited potent inhibition against human cervical cancer cells and insignificant toxicity to normal cells. The compounds 6d, 6a, 6h, 6b, and 6e induced apoptosis of HeLa cells, through ROS influx. The expression levels of proteins involved in the mitochondrion-related pathways were detected, and Western blot analysis showed that apoptosis occurred via activation of caspase-3.Item ANTICORROSIVE POTENTIAL OF ETHANOL EXTRACT OF DELONIX ELATA FOR MILD STEEL IN 0.5 M H 2 SO 4 - A GREEN APPROACH(Bulgarian Chemical Communications, 2019) Mahalakshmi, D; Unnisa, C B N; Hemapriya, V; Kim., S H; Prabakaran, MThe phytochemical constituents of Delonix elata, characterized by gas chromatography-mass spectroscopy (GC-MS) and their inhibitive action on mild steel in 0.5 M H2SO4 medium, are discussed in the present study. The impedance and polarization techniques showed a similar trend as regards concentration and inhibition efficiency. The optimized concentration of D. elata (10 % v/v) resulted in high inhibition efficiency (85.96%). To confirm the adsorption of inhibitors on the mild steel surface, morphological studies of the latter were carried out by means of scanning electron microscopy (SEM), energy dispersive spectroscopy (EDX) and atomic force microscopy (AFM) techniques for both uninhibited and inhibited specimens. The electrochemical measurements and surface studies were well associated with each other.Item SURVEY OF ETHNO MEDICINAL PLANTS, NILGIRI BIOSPHERE NATURE PARK AT THUVAIPATHY, ANAIKATTI, COIMBATORE, TAMILNADU, INDIA(Plant Archives, 2019) Hemila, P; Krishnaveni, CAn ethno medicinal Survey was conducted to collect information about medicinal plants used by Thuvaipathy tribal village people located in the forest area. About 180 medicinal plants are used in various health problems; Majority of the plant parts are stem, bark and leaves. The most representative families were Caesalpinaceae and Moraceae with 13 species each, Euphorbiaceae, and Mimosaceae with 9 species, Sapindaceae and Bignnoniaceae with 8 species each and Annonaceae and Apocynaceae with 6 species. The other families had 5 and below 5 species each associated with the treatment of the reports. The plants were found to be used in different forms such as juice, extracts, paste, powder, infusion. These ethno medicinal plants were used to treat ailments like cold, cough, headache, stomachache, dysentery, skin disease, poison bites, cut and wounds and diabetes.Item CDARGA: CLUSTER-BASED DATA AGGREGATION WITH GENETIC ROUTING ALGORITHM IN WIRELESS SENSOR NETWORKS(Blue Eyes Intelligence Engineering & Sciences Publication, 2020-03) Kowsalya, R; Rosiline Jeetha, BIn wireless sensor network, devices or nodes are normally battery powered devices. These nodes have imperfect quantity of primary energy that an enthusiastic at dissimilar rates, depending on the power or energy level. A modified centralized cluster based cluster-head selection is a primary issue in existing representative clustering methods such as M-LEACH and SEDC, cluster heads are selected with a optional likelihood in a distributed manner. So, there are huge deviations of the amount of clusters and size for each cluster at each round throughout network lifetime. In order to conquer issues of difficult cluster-head selection and great energy consumption in Centralized Clustering-Task Scheduling for wireless sensor networks (WSNs), in this paper presents a Modified Centralized Cluster-Head Selection (MCCHS) algorithm based on Simple Energy-efficient Data Collecting (SEDC) protocol was proposed. The proposed system presents a MCCHS algorithm in static manner selection algorithm for cluster head selection technique using NS (Network Simulator) 2.34 Framework. This technique leads to improved CH strength, reduction in the amount of clusters in the network, and improving the energy efficiency.Item POROUS REDUCED GRAPHENE OXIDE (RGO)/WO3 NANOCOMPOSITES FOR THE ENHANCED DETECTION OF NH3 AT ROOM TEMPERATURE(Royal Society of Chemistry, 2019-02-27) Jeevitha, G; Abhinayaa, R; Mangalaraj, D; Ponpandian, N; Meena, P; Veena, Mounasamy; Sridharan, MadanagurusamyIncorporation of reduced graphene oxide (rGO) modifies the properties of semiconducting metal oxide nanoparticles and makes it possible to tune the surface area and pore size to optimum values, which in turn improves their gas sensing properties. In this work, to improve the ammonia (NH3) gas sensing characteristics, reduced graphene oxide (rGO) was incorporated into tungsten oxide (WO3) nanospheres using a simple ultrasonication method. The rGO–WO3 nanocomposites exhibited porous nanosheets with nanospherical WO3 as observed with field-emission scanning electron microscopy (FE-SEM). The oxidation state of the rGO–WO3 nanocomposite was determined using X-ray photoelectron spectroscopy (XPS). Three ratios of (1, 5 and 10% rGO/WO3) nanocomposites and pure WO3 showed good selectivity towards NH3 at 10–100 ppm, and more remarkably at room temperature in the range of about 32–35 °C and at a relative humidity (RH) of 55%. The limit of detection (LOD) of the synthesized rGO–WO3 nanocomposites was 1.14 ppm, which will highly favour low detection ranges of NH3. The sensor response was 1.5 times higher than that of the bare WO3 nanospheres. The sensors showed excellent selectivity, ultrafast response/recovery times (18/24 s), reproducibility and stability even after one month of their preparation. We believe that metal oxides using the rGO modifier can improve the sensitivity and reduce the LOD towards NH3 and can be used effectively in real-time environmental monitoring.Item A STUDY ON CUSTOMER PREFERENCE TOWARDS ONLINE CAB BOOKING FACILITY WITH SPECIAL REFERENCE TO COIMBATORE CITY(Journal of Advanced Research in Dynamical and Control Systems, 2019) Yamuna, S M; Shiji, RThe phenomenal growth of passenger vehicle market is major role backed by the domestic taxi segment. The Indian passenger vehicle industry is expected to have a strong growth potential in the future, whereas medium to long term growth will be supported by low car penetration level and increasing income level of the consumers. In this study we have focused on how far the customer prefers online cab booking facility and also to know the customer opinion on tariff rate and promptness of their service.