2007: Recent submissions

Now showing items 101-120 of 143

Dual-mode semisquaraine-based sensor for selective detection of Hg2+ in a micellar medium

Rekha, R A; Jyothish, K; Ramaiah, D (American Chemical Society, 2007)

A novel chemosensor based on semisquaraine dye (SSQ) for selective detection of Hg2+ is described. SSQ is obtained in quantitative yields from the reaction between squaric acid and 6-ethoxy-2-quinaldinium iodide. SSQ in ...
Direct synthesis of varistor-grade doped nanocrystalline ZnO and its densification through a step-sintering technique

Anas, S; Mangalaraja, R V; Mukundan, P; Shukla, S K; Ananthakumar, S (Elsevier, 2007)

A direct synthesis of varistor-grade doped ZnO powder was attempted by simple hydrolysis followed by low-temperature refluxing (80 °C) in aqueous and alcoholic media. Rod like, one-dimensional nanocrystalline doped ZnO ...
Quantitative assessment of the stereoelectronic profile of phosphine ligands

Jomon Mathew; Tinto Thomas; Suresh, C H (American Chemical Society, 2007)

The stereoelectronic profile of a variety of phosphine ligands (PR3) have been estimated using a combined approach of quantum mechanics (QM) and molecular mechanics (MM). The quantum mechanically derived molecular electrostatic ...
Synthesis, photophysical, and electroluminescent properties of arylenevinylenes-co-pyrrolenevinylenes derived from divinylaryl bridged bispyrroles

Biswas, A K; Ashish, A; Tripathi, A K; Mohapatra, Y N; Ajayaghosh, A (American Chemical Society, 2007)

Synthesis, characterization, and photophysical properties of four different pi-conjugated oligomers containing alternate arylenevinylene and pyrrolenevinylene repeat units are reported. The optoelectronic properties are ...
Metallo supramolecular assemblies of bis-squaraines by allosteric Ca2+ ion binding

Yagi, S; Hyodo, Y; Hirose, M; Nakazumi, H; Sakurai, Y; Ajayaghosh, A (American Chemical Society, 2007)

Alkyl chain tethered bis-squaraines bind to Ca2+ ions through the participation of the negatively charged oxygen of the central cyclobutene moiety to form folded H-type aggregates. The initially formed Ca2+ complex is ...
Microwave dielectric properties of Sr2Ce2Ti5O16 ceramics

Subodh, G; Sebastian, M T (Elsevier, 2007)

Sr2Ce2Ti5O16 dielectric ceramics were prepared by conventional solid-state ceramic route. The structure and microstructure of the ceramics were investigated by X-ray diffraction and scanning electron microscopic methods. ...
Influence of zinc oxide addition on LnTiTaO6 (Ln = Pr, Sm and Dy) materials for dielectric resonators

Padma Kumar, H; Joseph, J T; Thomas, J K; Manoj Raama Varma; Annamma, J; Sam Solomon (Elsevier, 2007)

LnTiTaO6 ceramics, doped with ZnO, were prepared in the solid-state ceramic route. The cylindrical samples were sintered at temperatures between 1360 and 1575 ◦C. The densities were measured using Archimedes method. Samples ...
Synthesis of biocompatible hydrophobic silica–gelatin nano-hybrid by sol–gel process

Smitha, S; Shajesh, P; Mukundan, P; Nair, T D R; Warrier, K G K (Elsevier, 2007)

Silica–biopolymer hybrid has been synthesised using colloidal silica as the precursor for silica and gelatin as the biopolymer counterpart. The surface modification of the hybrid material has been done with methyltrimethoxysilane ...
Investigation of the role of chelating ligand in the synthesis of ion-imprinted polymeric resins on the selective enrichment of uranium(VI)

Metilda, P; Mary Gladis, J; Venkateswaran, G; Prasada Rao, T (Elsevier, 2007)

Uranyl ion-imprinted polymeric (IIP) resins were prepared by dissolving stoichiometric amounts of uranyl nitrate and selected chelating ligands,viz. salicylaldoxime, catechol, succinicacid,5,7-dichloroquinoline-8-ol and ...
Photoacoustic thermal characterization of porous rare-earth phosphate ceramics

George, S D; Rajesh Komban; Warrier, K G K; Radhakrishnan, P; Nampoori, V P N; Vallabhan, C P G (Springer, 2007)

The laser induced non-destructive photoacoustic technique has been employed to measure the thermal diffusivity of lanthanum phosphate ceramics prepared by the sol–gel route. The thermal diffusivity value was evaluated ...
Cell suspension cultures of portulaca grandiflora as potent catalysts for biotransformation of L-tyrosine into L-dopa,an anti-parkinson’s drug

Nisha Rani; Beena Joy; Emilia Abraham, T (Informa Healthcare, 2007)

3,4-Dihydroxy L-phenylalanine (L-DOPA) is considered a potent drug for the treatment of Parkinson disease, a neurologic disorder. Enantiomerically pure L-DOPA is produced from L-tyrosine in a single-step biotransformation ...
Selective recognition of tryptophan through inhibition of intramolecular charge-transfer interactions in an aqueous medium

Mahesh Hariharan; Suneesh, C K; Ramaiah, D (American Chemical Society, 2007)

A novel donor-acceptor conjugate 1 was synthesized, and its interactions with various amino acids have been investigated as compared to the model system 2. The conjugate 1 unusually forms an intramolecular charge-transfer ...
A new Hg2+-Selective fluorescent sensor based on a 1,3-alternate thiacalix[4]arene anchored with four 8-quinolinoloxy groups

Praveen, L; Ganga, V B; Thirumalai, R; Sreeja, T; Reddy, M L P; Luxmi Varma, R (American Chemical Society, 2007)

A new thiacalix [4]arene derivative in a 1,3-alternate conformation bearing four quinolinoloxy groups through propyl chains has been synthesized, and its metal ion-binding and fluorescence-sensing properties were investigated ...
Ansa-metallocene-based cyclic[2]pyrroles

Ramakrishnan, S; Srinivasan, A (American Chemical Society, 2007)

Syntheses and X-ray structural analyses of ansa-metallocene-based cyclic[2]pyrroles are described. The pyrrole units in the macrocycles adopt partial 1,2-alternate conformation in the solid state.
Effects of processing on the flavor compounds of Indian fresh ginger (Zingiber officinale Rosc.)

Nirmala Menon, A; Padmakumari, K P; Sankari Kutty, B; Sumathikutty, M A; Sreekumar, M M; Arumughan, C (Allured Publishing Corporation, 2007)

The original aroma compounds responsible for the fresh ginger flavor were isolated by Amberlite XAD-2 chromatography. Ginger oil was isolated by hydrodistillation from fresh ginger. Fresh ginger was dried and the oil was ...
Synthesis, characterization and thermal studies of boron containing phenolic and cardanolic polymers

Rosy Antony; Pillai, C K S (NISCAIR, 2007)

Boron containing phenolic and cardanolic polymers were synthesized by transesterification and further polymerization with hexamethylenetetramine. Flammability and thermal stability of these polymers were evaluated by LOI ...
Optimization of mixing parameters through a water model for metal matrix composites synthesis

Ravi, K R; Sreekumar, V M; Pillai, R M; Mahato, C; Amaranathan, K R; Arul kumar, R; Pai, B C (Elsevier, 2007)

The influence of the mixing parameters on the synthesis of Al-SiCp reinforced metal matrix composites (MMCs) by the stir casting technique is investigated through a water model. The effects of some important mixing parameters ...
Optical phonon modes and dielectric behavior of Sr1-3x/2CexTiO3 microwave ceramics

Moreira, R L; Lobo, R P S M; Subodh, G; Sebastian, M T; Matinaga, F M; Dias, A (American Chemical Society, 2007)

Sr1-3x/2CexTiO3 dielectric ceramics (with x varying from 0.133 to 0.400) were investigated by Raman and infrared spectroscopies. The observed features could be related to SrTiO3 phonon modes. The Raman spectra show first-order ...
Structure and microwave dielectric properties of Sr2+nCe2Ti5+nO15+3n (n e 10) homologous series

Subodh, G; Jose James; Sebastian, M T; Paniago, R; Dias, A; Moreira, R L (American Chemical Society, 2007)

Nominally Sr2+nCe2Ti5+nO16+3n dielectric ceramics were prepared by conventional solid-state ceramic route. The structure and microstructural features of the ceramics were investigated by X-ray diffraction, X-ray photoelectron ...
Near IR absorbing planar aromatic [34]octaphyrins(1.1.0.1.1.0.0.0) containing a quaterthiophene subunit

Kumar, R; Misra, R; Chandrashekar, T K; Suresh, E (Royal Society of Chemistry, 2007)

The synthesis and structural characterization of the first examples of planar aromatic core modified [34]octaphyrins(1.1.0.1.1.0.0.0) with three different heteroatoms containing a quaterthiophene subunit are reported.

Now showing items 101-120 of 143

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