2010: Recent submissions

Now showing items 121-140 of 165

Microwave dielectric properties of Co2La4Ti3Si4O22 ceramics

Chameswary, J; Sherin Thomas; Sebastian, M T (Wiley, 2010)

Co2La4Ti3Si4O22 ceramic was synthesized by the conventional solid-state ceramic route. The structure and microstructure of the sintered ceramics were characterized by X-ray diffraction (XRD) and scanning electron microscopic ...
Dielectric, thermal, and mechanical properties of CeO2-filled HDPE composites for microwave substrate applications

Anjana, P S; Deepu, V; Uma, S; Mohanan, P; Philip, J; Sebastian, M T (Wiley, 2010)

Cerium oxide-filled high density polyethylene (HDPE) composites for microwave substrate applications were prepared by sigma-blend technique. The HDPE was used as the matrix and the dispersion of CeO2 in the composite was ...
Nucleophilic heterocyclic carbene as a novel catalyst for cyclopropanation of cyano acrylates

Anabha, E R; Paul, R R; Suresh, E; Vijay Nair, G (Royal Society of Chemistry, 2010)

Nucleophilic heterocyclic carbenes (NHCs) have been used for the first time as catalysts in the cyclopropanation of ethyl cyanocinnamates with phenacyl bromide by Michael-initiated ring-closure (MIRC).
Effect of lithium magnesium zinc borosilicate glass addition on densification temperature and dielectric properties of Mg2SiO4 ceramics

Sasikala, T S; Pavithran, C; Sebastian, M T (Springer, 2010)

Mg2SiO4 (Forsterite) ceramics were synthesized by solid state route. The effect of lithium magnesium zinc borosilicate (LMZBS) glass addition on the densification temperature and microwave dielectric properties of forsterite ...
Investigation on alpha-galactosidase production by streptomyces griseoloalbus in a forcefully aerated packed-bed bioreactor operating in solid-state fermentation condition

Anisha, G S; Rojan P John; Prema, P; Pandey, A (Springer, 2010)

Solid-state fermentation (SSF) was carried out for the production of extracellular alpha-galactosidase by Streptomyces griseoloalbus. Soybean flour was the best solid substrate for alpha-galactosidase production. Packed-bed ...
Lysosomal destabilization and cathepsin B contributes for cytochrome c release and caspase activation in embelin-induced apoptosis

Beena Joy; Sivadasan, R; Emilia Abraham, T; John, M; Sobhan, P K; Seervi, M; Santhoshkumar, T R (Wiley, 2010)

XIAP is an important antiapoptotic protein capable of conferring resistance to cancer cells. Embelin, the small molecular inhibitor of XIAP, possesses wide spectrum of biological activities with strong inhibition of nuclear ...
A novel pseudo four component reaction involving homoenolate for the synthesis of gamma-aminobutyric acid (GABA) derivatives

Vijay Nair, G; Vimal Varghese; Beneesh, P B; Sinu, C R; Suresh, E (Royal Society of Chemistry, 2010)

Homoenolate generated from alpha,beta-unsaturated aldehydes by NHC catalysis underwent facile addition to conjugated sulfonimines, generated in situ, and subsequent methanolysis to afford protected GABA derivatives ...
Bifunctionalized hybrid silica spheres by hydrolytic cocondensation of 3-aminopropyltriethoxysilane and vinyltriethoxysilane

Bindu, P N; Pavithran, C (American Chemical Society, 2010)

Facile, surfactant free synthetic strategy for bifunctionalized hybrid silica spheres (HS) with structural ordering is presented. HS was prepared by casting and drying of stable siloxane solution from hydrolytic co-condensation ...
Pyridine core activation via 1,5-electrocyclization of vinyl pyridinium ylides generated from bromo isomerized Morita-Baylis-Hillman adduct of isatin and pyridine: Synthesis of 3-spirodihydroindolizine oxindoles

Baby Viswambharan; Selvakumar, K; Suchithra, M; Shanmugam, P (American Chemical Society, 2010)

An activation of the pyridine nucleus has been achieved via 1,5-electrocyclization of vinyl pyridinium ylides generated from bromo isomerized Morita-Baylis-Hillman adducts of isatin and pyridine under basic conditions. The ...
An efficient stereoselective synthesis of 3-spirocyclopentene- and 3-spiropyrazole-2-oxindoles via 1,3-dipolar cycloaddition reaction

Selvakumar, K; Vaithiyanathan, V; Shanmugam, P (Royal Society of Chemistry, 2010)

The chemistry phosphorus and sulfur ylides have been exploited for a facile, short and efficient synthesis of 3-spirocyclopentene- and 3-spiropyrazole-2-oxindoles from E- and Z-isomers of bromo derivatives of Morita-Baylis-Hillman ...
Sol-gel route to synthesize titania-silica nano precursors for photoactive particulates and coatings

Smitha, V S; Manjumol, K A; Baiju, K V; Ghosh, S K; Perumal, P; Warrier, K G K (Springer, 2010)

Nano titanium dioxide sols containing silica in the range 5-50 mol% have been synthesized using sol-gel route starting from titanyl sulphate with a view of developing antisoiling surfaces. The titania sol had an average ...
Ambient pressure drying: a successful approach for the preparation of silica and silica based mixed oxide aerogels

Aravind, P R; Shajesh, P; Soraru, G D; Warrier, K G K (Springer, 2010)

Silica aerogels have received much attention in recent years as it has got a wide range of properties like high surface area, low density, high porosity, low dielectric constant, low thermal conductivity. Recently to make ...
Surface plasmon coupled circular dichroism of Au nanoparticles on peptide nanotubes

Jino George; George Thomas, K (American Chemical Society, 2010)

Au nanoparticles grown on d- and 1-isomers of diphenylalanine peptide nanotubes showed a bisignated CD signal at their surface plasmon frequency with positive and negative couplets, respectively. The surface plasmon coupled ...
NHC catalyzed transformation of aromatic aldehydes to acids by carbon dioxide: An unexpected reaction

Vijay Nair, G; Vimal Varghese; Paul, R R; Anu, J; Sinu, C R; Rajeev S Menon (American Chemical Society, 2010)

A facile NHC-mediated reaction of aromatic aldehydes with carbon dioxide leading to carboxylic acids is described. The present protocol is mechanistically important, and it can serve as a tool for the sequestration of ...
A statistical approach for optimization of polyhydroxybutyrate production by Bacillus sphaericus NCIM 5149 under submerged fermentation using central composite design

Nisha, V R; Soccol, C R; Pandey, A (American Chemical Society, 2010)

The aim of this work was to statistically optimize the cultural and nutritional parameters for the production of polyhydroxybutyrate (PHB) under submerged fermentation using jackfruit seed hydrolysate as the sole carbon ...
Effect of bridging units on photophysical and DNA binding properties of a few cyclophanes

Neelakandan, P P; Sanju, K S; Ramaiah, D (Springer, 2010)

A few novel anthracene-based cyclophanes CP-1, CP-2 and CP-3 were synthesized and their interactions with DNA were investigated employing photophysical and biophysical techniques. In methanol and acetonitrile, these systems ...
Influence of Ca[(Li1/3Nb2/3)(0.8)Ti-0.2]O3-delta filler on the microwave dielectric properties of polyethylene and polystyrene for microelectronic applications

Sumesh George; Deepu, V N; Mohanan, P; Sebastian, M T (Wiley, 2010)

Ceramic reinforced polyethylene and polystyrene composites were prepared by melt mixing and hot molding techniques. Temperature stable low-loss Ca[(Li1/3Nb2/3)(0.8)Ti-0.2]O3-delta (CLNT) ceramic was used as the filler to ...
Isolation and characterization of plant growth promoting bacteria from non-rhizospheric soil and their effect on cowpea (Vigna unguiculata (L.) Walp.) seedling growth

Deepa, C K; Dastager, S G; Pandey, A (Springer, 2010)

The efficacy of four potential phosphate solubilizing Enterobacter isolated from non-rhizospheric soil in Western ghat forest in India. Plant growth promoting ability of these isolates was evaluated in cowpea. All are gram ...
Characterization of plant growth-promoting rhizobacterium Exiguobacterium NII-0906 for its growth promotion of cowpea (Vigna unguiculata)

Dastager, S G; Deepa, C K; Pandey, A (Springer, 2010)

A phosphate solubilizing and antagonistic bacterial strain, isolated from a Western Ghat forest soil in Kerala province, India (designated as NII-0906), showed cold tolerance and grew from 10 to 37 degrees C (optimum ...
A complementary guest induced morphology transition in a two-component multiple H-bonding self-assembly

Tazawa, T; Yagai, S; Kikkawa, Y; Karatsu, T; Kitamura, A; Ajayaghosh, A (Royal Society of Chemistry, 2010)

An oligo(p-phenylenevinylene) (OPV) dimer, whose OPV units are capped on their end by monotopic melamine hydrogen-bonding units, self-assembles in methylcyclohexane to form flexible fibrous nanostructures, which are ...

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