2009: Recent submissions

Now showing items 61-80 of 184

Oxide ion conductivity and relaxation in CaREZrNbO7 (RE=La,Nd, Sm,Gd, and Y) system

Sibi, K S; Radhakrishnan, A N; Deepa, M; Prabhakar Rao, P; Peter Koshy (Elsevier, 2009)

CaREZrNbO7 (RE=La, Nd, Sm, Gd and Y) system changed from fluorite (F)-type to pyrochlore (P)-type structure when the ionic radius ratios, r(Ca2+–RE3+)av/r(Zr4+–Nb5+)av were larger than 1.34. Thus, the La, Nd, and Sm ...
Characterization studies on Ilmenite of ullal and suratkal along Karnataka coastline, west coast of India

Sundararajan, M; Bhat, H K; Babu, N; Janaki, M E K; Mohan Das, P N (JMMCE, 2009)

Granulometric and heavy mineral investigations of sediments along the coastal region from Ullal beach to Suratkal beaches along western coast of Karnataka were undertaken systematically. Texturally the beach sediments were ...
Quantification of substituent effects using molecular electrostatic potentials: Additive nature and proximity effects

Sayyed, F B; Suresh, C H (Royal Society of Chemistry, 2009)

Several ortho, meta, and para substituted benzoic acids have been studied to quantify the substituent effects by analysing subtle variations in the molecular electrostatic potential minimum (V(min)) at the response site ...
Evaluation for the beneficiability of yellow silica sands from the overburden of lignite mine situated in Rajpardi district of Gujarat, India

Sundararajan, M; Ramaswamy, S; Raghavan, P (JMMCE, 2009)

A representative feed sample of Yellow sand was wet-sieved in order to recover the desired fractions for glass making. The mass percentage of (–600 +300) μm and (–300 +125)μm fraction was found to be 44.2 and 55.8% (ratio ...
Evaluation for the beneficiability of white silica sands from the overburden of lignite mine situated in Rajpardi district of Gujarat, India

Sundararajan, M; Ramaswamy, S; Raghavan, P (JMMCE, 2009)

A representative feed sample of White Silica Sand was wet-sieved in order to recover the desired fractions for glass making. BIS specification shows that (–600, +300) μm] fraction [A] should not be more than 50% and (–300, ...
Crystal structure of Sr 0.4 Ce 0.4 TiO 3 ceramics

Ubic, R; Subodh, G; Gout, D; Sebastian, M T; Proffen, T (American Chemical Society, 2009)

A cerium-doped SrTiO3 compound with the composition Sr0.4Ce0.4TiO3 has been produced by conventional solid-state processing. The structure of this compound was analyzed by X-ray, electron,and neutron diffraction. While no ...
Characterization of ilmenite from Kerala coastline, India:Implications in the production of synthetic rutile

Sundararajan, M; Bhat, H K; Velusamy, S; Babu, N; Janaki, M E K; Sasibhooshanan, S; Mohan Das, P N (JMMCE, 2009)

Surface samples have been collected from Kerala coast, Chavakad - Ponnani (CP- central sector), Neendakara – Kayamkulam (NK- southern sector) beach sectors for ilmenite characterization studies. The TiO2 percentage in ...
Controlled growth of nanoparticle clusters through competitive stabilizer desorption

Stolarczyk, J K; Ghosh, S K; Brougham, D F (Wiley, 2009)

Size-controlled clusters: Clusters of preformed 15 nm oleic acid coated superparamagnetic iron oxide nanoparticles were prepared through partially destabilizing suspensions of the dispersed nanoparticles with CN-modified ...
Novel nucleophilic heterocyclic carbene mediated stereoselective conjugate addition of enals to nitrostyrenes via homoenolate

Vijay Nair, G; Sinu, C R; Beneesh, P B; Varghese, V; Anu Jose; Suresh, E (American Chemical Society, 2009)

A stereoselective Michael addition of homoenolate, generated from enals by nucleophilic heterocyclic carbene (NHC) catalysis, to beta-nitrostyrenes is reported for the first time. The products of this reaction obtained in ...
Role of amphiphilic dopants on the shape and properties of electrically conducting polyaniline-clay nanocomposite

Reena, V L; Sudha, J D; Pavithran, C (Wiley, 2009)

The role of functionality and rigidity of the amphiphilic dopants on the morphology and electrical property of the polyaniline-clay nanocomposites (PAN-ICNs) were studied by preparing polyaniline (PANI) and PANICNs using ...
Improvement on citric acid production in solid-state fermentation by Aspergillus niger LPB BC mutant using citric pulp

Rodrigues, C; de Souza Vandenberghe, L P; Teodoro, J; Pandey, A; Soccol, C R (Springer, 2009)

Citric acid (CA) production has been conducted through a careful strain selection, physical–chemical optimization and mutation. The aim of this work was to optimize the physical–chemical conditions of CA production by ...
Tunable photophysical properties of phenyleneethynylene based bipyridine ligands

James, P V; Yoosaf, K; Jatish Kumar; George Thomas, K; Listorti, A; Accorsi, G; Armaroli, N (Royal Society of Chemistry, 2009)

A bipyridine-based system with phenyleneethynylene at the 4,4′ positions (1) and its p-methyl (2) and p-methoxy (3) substituted derivatives were synthesized via Sonogashira coupling reactions. The photophysical properties ...
Single polymer photosensitizer for Tb3+ and Eu3+ Ions: An approach for white light emission based on carboxylic-functionalized poly(m-phenylenevinylene)s

Balamurugan, A; Reddy, M L P; Jayakannan, M (American Chemical Society, 2009)

Here, we have demonstrated a facile molecular approach to generate white light emission by combining carboxylic functionalized poly(m-phenylenevinylene)s polymeric architectures with lanthanide beta-diketonate complexes. ...
Synergistic enhancement and separation of zirconium(IV) and hafnium(IV) with 3-phenyl-4-benzoyl-5-isoxazolone in the presence of crown ethers

Reddy, K J; Kumar, J R; Reddy, M L P; Reddy, A V; Park, H-S; Choo, K- H (Taylor & Francis, 2009)

3-Phenyl-4-benzoyl-5-isoxazolone (HPBI) was synthesized and examined with regard to the synergistic solvent extraction behavior of zirconium(IV) and hafnium(IV) in the presence of various crown ethers (CEs), namely, ...
Microwave dielectric properties and low-temperature sintering of cerium oxide for LTCC applications

Anjana, P S; Sebastian, M T (Wiley, 2009)

The effect of glass additives on the microstructure, densification, and microwave dielectric properties of cerium oxide for low-temperature co-fired applications was investigated. Different weight percentages of quenched ...
A facile approach to hexagonal ZnO nanorod assembly

Uma, K; Ananthakumar, S; Mangalaraja, R V; Mahesh, K P O; Soga, T; Jimbo, T (Springer, 2009)

Nanocrystalline ZnO nanorods were successfully grown by ultrasonication using an acidic ethanolic zinc acetate precursor solution followed by a flow coating process and annealing at 600 A degrees C. The ZnO nanorods obtained ...
Tape casting and dielectric properties of Zn2Te3O8-based ceramics with an ultra-low sintering temperature

Honkamo, J; Jantunen, H; Subodh, G; Sebastian, M T; Mohanan, P (American Ceramic Society, 2009)

The suitability of dielectric ceramics made of zinc tellurate (Zn2Te3O8) and titanium dioxide (TiO2) with an ultra-low sintering temperature (6501C) for tape casting and thus for the multimodule technique with Al electrodes ...
Finite size effect on the sinterability and dielectric properties of ZnNb2O6-ZBS glass composites

Sanoj, M A; Reshmi, C P; Manoj Raama Varma (Wiley, 2009)

ZnNb2O6 (ZN) is a columbite-structured niobate compound showing excellent dielectric properties and comparatively low sintering temperatures (similar to 1200 degrees C). Hence it is a good candidate for possible low-temperature ...
Erratum: Enhancement of critical current density and flux pinning properties of Gd-doped (Bi,Pb)-2212 superconductor (Jl Appl Physics Vol 104, 043905, 2008)

Vinu, S; Sarun, P M; Shabna, R; Syamaprasad, U (American Institute of Physics, 2009)
Anisotropic self-assembly of photoluminescent oligo(p-Phenylenevinylene) derivatives in liquid crystals: An effective strategy for the macroscopic alignment of pi-gels

Hirai, Y; Santhosh Babu, S; Praveen, V K; Yasuda, T; Ajayaghosh, A; Kato, T (Wiley, 2009)

Aligned photoluminescent fibers are formed by the self assembly of an oligo(p-phenylenevinylene) derivative (OPV) in oriented liquid crystals (see figure). The aligned fibers of OPV show polarized yellow emission in the ...

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