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Browsing 2009 by Issue Date

Now showing items 1-20 of 184

High surface area sol-gel alumina-titania nanocatalyst

Padmaja, P; Warrier, K G K; Padmanabhan, M; Wunderlich, W (Springer, 2009)

Alumina-titania mixed oxide nanocatalysts with molar ratios = 1:0.5, 1:1, 1:2, 1:5 have been synthesized by adopting a hybrid sol-gel route using boehmite sol as the precursor for alumina and titanium isopropoxide as the ...
Silica–titania aerogel monoliths with large pore volume and surface area by ambient pressure drying

Aravind, P R; Shajesh, P; Mukundan, P; Warrier, K G K (Springer, 2009)

Ambient pressure drying has been carried out for the synthesis of silica-titania aerogel monoliths. The prepared aerogels show densities in the range 0.34-0.38 g/cm(3). The surface area and pore volume of these mixed oxide ...
Environmentally benign sol-gel derived nanocrystalline rod shaped calcium doped cerium phosphate yellow-green pigment

Sumaletha, N; Rajesh Komban; Mukundan, P; Warrier, K G K (Springer, 2009)

Nanocrystalline rod shaped calcium doped cerium phosphate yellow-green pigment particles having an average length of similar to 100 nm and aspect ratio 10 even after calcination at 600 degrees C have been realized through ...
Synthesis of nanocrystalline yttria through in-situ sulphated-combustion technique

Mangalaraja, R V; Ananthakumar, S; Mouzon, J; Uma, K; Lopez, M; Camurri, C P; Oden, M (Ceramic Society of Japan, 2009)

An in-situ sulphated-combustion reaction was conducted on the precursor mixture consisting of yttrium nitrate, organic fuels (urea, citric acid and glycine) and 10 mol% ammonium sulphate [(NH4)(2)SO4] at 500 degrees C. ...
Role of matrix alloy chemistry on the interfacial reaction and solidification of metal matrix composites

Pai, B C; Ravi, K R; Pillai, R M (Springer, 2009)

Equilibrium Si content required to suppress the interfacial reaction in 2124 Al/SiC and A356 Al/SiC has been thermodynamically predicted by combining Wilson equation with the Miedema model. In 2124 Al/SiC composites, good ...
Thermogravimetric and weathering study of novolac resin composites reinforced with mercerized bamboo fiber

Das, M; Prasad, V S; Chakrabarty, D (Wiley, 2009)

The effect of alkali treatment of bamboo strips on the thermal and weathering properties of unidirectional bamboo strips-novolac resin composites were investigated in this work. Both alkali treated and untreated bamboo ...
An electrostatic scale of substituent resonance effect

Sayyed, F B; Suresh, C H (Elsevier, 2009)

Substituent resonance constant, sigma(V)(R) is calculated front Substituted benzenes using molecular electrostatic potential (MESP). The reliability of sigma(V)(R) is rigorously verified using isodesmic reactions and found ...
Enhanced permittivity by the adhesion of conducting and low-loss insulating ceramics in polystyrene

Sumesh George; Sebastian, M T (Wiley, 2009)

Ca[(Li(1/3)Nb(2/3))(0.8)Ti(0.2)]O(3-delta) (CLNT)-polystyrene-La(0.5)Sr(0.5)CoO(3-delta) (LSCO) three-phase composites were prepared by a two-step mixing and hot-molding method. The dielectric properties of polystyrene-CLNT ...
Scaling of the vortex-liquid resistivity and temperature and magnetic field dependent activation energy in Ho doped (Bi, Pb)-2212 superconductor

Vinu, S; Sarun, P M; Shabna, R; Biju, A; Syamaprasad, U (American Institute of Physics, 2009)

The vortex-liquid resistivity close to the vortex glass to liquid transition region is analyzed in detail for Ho doped (Bi, Pb)-2212 superconductor. A large broadening of resistive transition in magnetic field is observed, ...
Compactin production studies using penicillium brevicompactum under solid-state fermentation conditions

Shaligram, N S; Singh, S K; Singhal, R S; Pandey, A; Szakacs, G (Humana Press, 2009)

In the present study, compactin production by Penicillium brevicompactum WA 2315 was optimized using solid-state fermentation. The initial one factor at a time approach resulted in improved compactin production of 905 mu ...
Sintering, microstructural and mechanical characterization of combustion synthesized Y2O3 and Yb3+-Y2O3

Mangalaraja, R V; Ananthakumar, S; Mouzon, J; Lopez, M; Camurri, C P; Oden, M (Ceramic Society of Japan, 2009)

The present work highlights the microstructural features and mechanical properties of Y2O3 prepared with and without Yb3+ doping that processed through combustion synthesis involving various organic fuels such as urea, ...
Hydrothermal processing of dye-adsorbing one-dimensional hydrogen titanate

Baiju, K V; Shukla, S; Biju, S; Reddy, M L P; Warrier, K G K (Elsevier, 2009)

One-dimensional hydrogen titanate consisting of mixed nanobelts, nanotubes, and nanorods have been processed via hydrothermal followed by high temperature calcination. The processed products have been characterized via ...
Mechanical properties of organomodified kaolin/natural rubber vulcanizates

Yahaya, L E; Adebowale, K O; Menon, A R R (Elsevier, 2009)

Kaolin modified with sodium salt of rubber seed oil (RSO-Na) was compounded with natural rubber (NR) by melt intercalation. The effect of modified kaolin loading on the physicomechanical properties of the vulcanizates was ...
Volatile constituents from the leaves and flowers of Murraya koenigii (Linn.) spreng

Padmakumari, K P (Taylor & Francis, 2009)

The volatiles of fresh leaf and flower of Murraya koenigii, grown in Thiruvananthapuram, Kerala were isolated by simultaneous distillation and extraction method and analysed by high resolution GC and GC-MS. Fifty two ...
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 ...
Carboxylic-functionalized water soluble pi-conjugated polymer: Highly selective and efficient chemosensor for Mercury(II) ions

Balamurugan, A; Reddy, M L P; Jayakannan, M (Wiley, 2009)

Here, we report a new carboxylic-functionalized water soluble pi-conjugated polymer for selective detection of highly toxic Hg(2+) in neutral pH condition. carboxylic-functionalized thiophene containing oligophenylenevinylene ...
Large-Scale synthesis of polyaniline nanoﬁbers based on renewable resource molecular template

Anilkumar, P; Jayakannan, M (Wiley, 2009)

We report reproducible large-scale synthesis of polyaniline (PANI) nanofibers up to 100 g scale via micelle mediated soft template approach. A unique built-in amphiphilic azobenzenesulfonic acid based on renewable resource ...
Grain refining mechanisms in magnesium alloys - An overview

Vinotha, D; Raghukandan, K; Pillai, U T S; Pai, B C (Springer, 2009)

The literature on mechanisms of grain refinement in magnesium alloys is reviewed with regard to two broad groups of alloys: aluminium-bearing and aluminium-free alloys. While a low level zirconium addition significantly ...
Self-Assembled cylindrical and vesicular molecular templates for polyaniline nanofibers and nanotapes

Anilkumar, P; Jayakannan, M (American Chemical Society, 2009)

We report a soft template approach based on a custom-designed novel surfactant-cum-dopant for size and shape tuning of polyaniline nanomaterials such as nanofibers and nanotapes via emulsion and dispersion polymerization ...
Structural and optical characterization of pulsed laser-ablated potassium lithium niobate thin ﬁlms

Jayasree, V; Ratheesh, R; Prabhakar Rao, P; Peter Koshy; Ganesan, V; Nayar, V U; Mahadevan Pillai, V P (Wiley, 2009)

Thin films of potassium lithium niobate (K, Li, Nb-O, KLN) have been prepared on glass substrate as a functional substrate temperature, using a pulsed laser deposition (PLD) technique or the first time. Grazing-incidence ...

Now showing items 1-20 of 184

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