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Marchon N.,Goa UniversityGoa | Naik G.,Goa UniversityGoa
IEEE Region 10 Annual International Conference, Proceedings/TENCON | Year: 2017

Pregnant mothers can be monitored for accurate fetal ECG (FECG) from the abdominal ECG (aECG). This can help detect fetal asphyxia based on the decreasing fetal heart rate (FHR) before the fetus enters into the acidosis phase. In this paper, a technique is proposed based on the adaptive neuro fuzzy inference system (ANFIS) along with a fetal QRS detector. The proposed QRS detector is based on the Pan and Tompkins algorithm which is optimized to give the least number of incorrect maternal and fetal R peaks. The modified QRS detector adjusts the threshold for each record to obtain FHR. The proposed ANFIS system which was evaluated with the abdominal and direct fetal ECG (adfecgdb) physionet recordings, correctly estimated the FECG signal for most records. Using Matlab Mobile we could wirelessly connect to the laptop running Matlab files with our smartphone, accurately displaying simulations files and average FHR for each record. © 2016 IEEE.

D'Costa S.,Goa UniversityGoa | Pai I.K.,Goa UniversityGoa
Indian Journal of Geo-Marine Sciences | Year: 2017

Copper (Cu), zinc (Zn), lead (Pb) and cadmium (Cd) concentrations in water and zooplankton were studied along the central west coast of India to assess spatial and temporal variations. The water and zooplankton samples were collected during different seasons. They were subjected to AAS to know the metal concentrations. Results showed that zinc showed higher concentrations at the study sites while cadmium showed the least content. Anthropogenic sources did not seem to significantly influence the metal concentrations in water and zooplankton. © 2017, National Institute of Science Communication and Information Resources (NISCAIR). All rights reserved.

Srinivasan B.R.,Goa UniversityGoa
Optik | Year: 2016

The authors of a recent paper (Optik 125 (2014) 2022-2025) claim to have grown a so called thiosemicarbazide lead nitrate (TSLN) crystal by the slow evaporation method. In this comment we prove that TSLN is actually thiosemicarbazide. © 2016 Elsevier GmbH. All rights reserved.

Dhavskar K.T.,Goa UniversityGoa | Srinivasan B.R.,Goa UniversityGoa
Indian Journal of Chemistry - Section A Inorganic, Physical, Theoretical and Analytical Chemistry | Year: 2016

The synthesis and characterization of tetraaquabis(4-methoxyphenylacetato-O′)magnesium(II) dihydrate (1) and catena-poly[[(diaqua)manganese(II)]bis(μ2-4-methoxyphenylacetato-O,O′)] (2) based on 4-methoxyphenylacetic acid (4-mpaH) ligand is reported. In 1, the unique 4-mpa functions as a monodentate ligand for Mg(II) situated on an inversion centre, resulting in a monomeric Mg(II) complex. The Mn(II) in 2 is also located on an inversion centre and the μ2-bridging bidentate coordination mode of the unique 4-mpa ligand results in the formation of a two-dimensional manganese coordination polymer.

The synthesis, spectral, thermal, magnetic properties, and structural features of four new one-dimensional (1-D) polymers having formula [M(4-npa)2(μ2-H2O)(H2O)2]·2H2O where (M = Mn 1; M = Co 2; M = Zn 3; M = Ni 4; 4-npa = 4-nitrophenylacetate) are investigated and compared with corresponding 4-nitrobenzoate (4-nba) analogues. The single crystal studies reveal that compounds 1–3 are isostructural and crystallize in the centrosymmetric monoclinic space group P21/c. Their structure consists of distorted octahedra of a unique central metal ion, two crystallographically unique monodentate 4-npa ligands, two terminal water molecules, a μ2-bridging bidentate water and two lattice water molecules. The central metal exhibits a distorted {MO6} octahedron with two O atoms from terminal water molecules disposed cis to each other, two O atoms from the monodentate carboxylates also disposed in a cis geometry and the remaining two O atom from the μ2-bridging bidentate water disposed trans. The μ2-brindging mode of water leads to the formation of an extended 1-D chain structure. The lattice water links parallel 1-D chains with the aid of H-bonding interactions. The IR, XRD powder pattern, thermal characterization and elemental analysis reveal that the structure of polycrystalline compound 4 is nearly identical with that of other 4-npa analogues. © 2017

Naik M.Z.,Goa UniversityGoa | Salker A.V.,Goa UniversityGoa
Materials Science and Engineering B: Solid-State Materials for Advanced Technology | Year: 2016

MgFe1−xInxO4 nanoparticles (where x = 0.00, 0.04, 0.08, 0.12 and 0.16) have been prepared by sol-gel method using citric acid. The appearance of two distinct bands corresponding to tetrahedral and octahedral occupied [Formula presented] bonds has been demonstrated in Fourier Transform Infra Red spectra (FT-IR). X-ray powder pattern confirmed the presence of a cubic spinel phase. X-ray Photoelectron Spectroscopy (XPS) has been employed to confirm the valence states of the metal ions present. Mössbauer spectroscopy shows the sextet for pristine sample and on In3+ doping the super-paramagnetic doublet becomes prominent. AC susceptibility profiles shows transition from single domain structure to super-paramagnetic particles on doping. The magnetic properties have been studied using Vibrating Sample Magnetometer (VSM), here the M-H and M-T curves showed the formation of super-paramagnetic nanoparticles at room temperature, where the saturation magnetisation (Ms), remnant magnetisation (Mr) and coercivity (Hc) values decreased with In3+ incorporation. © 2016 Elsevier B.V.

Salker A.V.,Goa UniversityGoa | Desai M.S.F.,Goa UniversityGoa
Catalysis Communications | Year: 2016

Catalytic conversion of NO and CO over Cu substituted cobalt oxide spinels show excellent activity for CO-O2 and NO-CO reactions. Lower concentration of Cu in cobalt oxide spinel is having an enhancing effect on the catalytic conversion. Best activity among the tested catalyst was found for Co2.9Cu0.1O4 and complete conversion (100%) is observed at 93 °C for CO oxidation by O2 and 209 °C for NO reduction by CO. Prepared catalysts show promising activity compared to few of the precious metal based catalysts reported in the literature. The influence of moisture and oxygen on catalytic conversion has been studied. © 2016 Elsevier B.V.

Srinivasan B.R.,Goa UniversityGoa | Tylczynski Z.,Adam Mickiewicz University
Journal of Thermal Analysis and Calorimetry | Year: 2015

Abstract The authors of the title paper (Hanumantharao and Kalainathan in J Therm Anal Calorim 114:239-243, 2013) claim to have grown a novel nonlinear optical urea thiourea cadmium sulfate crystal, represented by no molecular formula but by a code UTCS. Using the title crystal as an example, we wish to express the necessity of reporting molecular formula for new compounds and not abbreviations like UTCS. © 2015 The Author(s).

Salker A.V.,Goa UniversityGoa | Desai M.S.F.,Goa UniversityGoa
Applied Surface Science | Year: 2016

Pd, Rh and Ru doped cobalt oxide spinels have been prepared by citric acid assisted sol-gel method to yield nano-catalysts. Compositions have been characterized by XRD, FTIR, TG/DTA, BET, SEM, TEM, TPD and XPS techniques. Simultaneous catalytic detoxification of nitric oxide and carbon monoxide is investigated over the doped and pristine catalysts. Metal doping is found to enhance the activity of the catalysts due to their better adsorption capacity. Moisture and oxygen tolerance is investigated for Rh and Pd substituted catalysts. A probable reaction mechanism on the catalyst surface has been proposed. © 2016 Elsevier B.V.

Boonmee S.,Mae Fah Luang University | Bhat J.D.,Goa UniversityGoa | Maharachchikumbura S.S.N.,Mae Fah Luang University | Hyde K.D.,Mae Fah Luang University
Phytotaxa | Year: 2014

An unusual wood-inhabiting fungus was found in northern Thailand. The combination of characters of this taxon, viz. setose, ostiolate ascomata, bitunicate asci, dark brown, wedge-shaped to clavate, muriform ascospores, and a hyphomycetous asexual state producing ellipsoidal, septate, highly constricted, holoblastic conidia is not found in any hitherto described genus of Dothideomycetes. An LSU phylogeny showed this taxon to be clearly placed in the family Sympoventuriaceae, Venturiales. The name Clavatispora thailandica gen. and sp. nov., is introduced to accommodate this taxon, which is described and illustrated and compared with other genera in this family. © 2014 Magnolia Press.

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