2006: Recent submissions

Now showing items 61-80 of 197

Synthesis of functionalized 3-spirocyclopropane-2-indolones from isomerised Baylis-Hillman adducts of isatin

Shanmugam, P; Vaithyanathan, V; Viswambharan, B (Elsevier, 2006)

A facile, high yield stereoselective synthesis of functionalized diastereomeric 3 -spirocyclopropane-2-indolones (10-17a,b) from the isomerised bromo derivatives of Baylis-Hillman adducts of isatin(2-9a,b) by reductive ...
CAN-mediated stereoselective cyclization of epoxypropyl cinnamyl amines to 3,4,5-trisubstituted piperidines and supramolecular assembly of the latter aided by ethyl acetate

Vijay Nair, G; Mohanan, K; Suja, T D; Suresh, S (Elsevier, 2006)

The stereoselective intramolecular cyclization of epoxypropyl cinnamyl amines mediated by substoichiometric quantities of CAN leading to the synthesis of functionalized piperidines and the formation of a supramolecular ...
Tamarind seed powder and palm kernel cake: two novel agro residues for the production of tannase under solid state fermentation by Aspergillus niger ATCC 16620

Sabu, A; Pandey, A; Daud, M J; Szakacs, G (Elsevier, 2006)

Palm kernel cake (PKC), the residue obtained after extraction of palm oil from oil palm seeds and tamarind seed powder (TSP) obtained after removing the fruit pulp from tamarind fruit pod were tested for the production of ...
Photochemistry of Ruthenium Trisbipyridine Functionalized on Gold Nanoparticles

Pramod, P; Sudeep, P K; George Thomas, K; Kamat, P V (American Chemical Society, 2006)

Design of nanohybrid systems possessing several ruthenium trisbipyridine (Ru(bpy)32+) chromophores on the surface of gold nanoparticles, by adopting a place exchange reaction, was reported and their photophysical properties ...
Lithium ion induced stabilization of the liquid crystalline DNA

Neethu Sundaresan; Thresia Thomas; Thomas, T J; Pillai, C K S (Wiley, 2006)

A comparative study of the effects of alkali metal ions Li+, Na+, K+, Rb+, and Cs+ on the liquid crystalline organization of high-molecular-weight calf thymus DNA using polarized light microscopy was performed. Major ...
N-heterocyclic carbene catalyzed reaction of enals and 1,2-dicarbonyl compounds: Stereoselective synthesis of spiro gamma-butyrolactones

Vijay Nair, G; Sreekumar, V; Manojkumar, P; Resmi Mohan; Suresh, E (American Chemical Society, 2006)

Nucleophilic heterocyclic carbene (NHC) catalyzed annulation of enals and cyclic 1,2-dicarbonyl compounds, opening a route to gamma-spirolactones, has been observed for the first time. The strategy works well with isatins, ...
Reaction of hydroxyl radicals with azacytosines: A pulse radiolysis and theoretical study

Pramod, G; Prasanthn Kumar, K P; Hari Mohan; Manoj, V M; Manoj, P; Suresh, C H; Aravindakumar, C T (American Chemical Society, 2006)

Pulse radiolysis and density functional theory (DFT) calculations at B3LYP/6-31+G(d,p) level have been carried out to probe the reaction of the water-derived hydroxyl radicals ((OH)-O-center dot) with 5-azacytosine (5Ac) ...
New dielectric materials based on pyrochlore-type oxides-Ca3RE3Ti7Ta2O26.5 (RE = Pr, Sm, Gd, Dy or Y): Structure, FT-IR spectra, microstructure and dielectric properties

Prabhakar Rao, P; Ravindran Nair, K; Peter Koshy; Vaidyan, V K (Springer, 2006)

New dielectric materials based on complex oxides containing rare earth tantalates: Ca3RE3Ti7Ta2O26.5 (RE = Pr, Sm, Gd, Dy or Y) have been investigated for their structure, FT-IR spectra, microstructure and dielectric ...
Influence of calcium on the microstructure and properties of an Al-7Si-0.3Mg-xFe alloy

Sreeja Kumari, S S; Pillai, R M; Nogita, K; Dahle, A K; Pai, B C (The Minerals, Metals & Materials Society, 2006)

The effect of Ca addition on the microstructure, physical characteristics (density/porosity), and mechanical properties (tensile and impact strength) has been investigated in an Al-7Si-0.3Mg-xFe (x = 0.2, 0.4, and 0.7) ...
New perspectives for citric acid production and application

Soccol, C R; Vandenberghe, L P S; Ridrigues, C; Pandey, A (Faculty of Food Technology aqnd Biotechnology, 2006)

There is a great worldwide demand for citric acid consumption due to its low toxicity when compared with other acidulants used mainly in the pharmaceutical and food industries. Other applications of citric acid can be found ...
Rutilation in nickel oxide-doped titania prepared by different methods

Riyas, S; Krishnan, G; Mohan Das, P N (Elsevier, 2006)

Titanium dioxide shows polymorphism on heating at high temperature. This strongly depends on temperature and duration of heating. When amorphous titania pulp was heated at different temperatures and time between 900 and ...
Nano-crystalline titanium dioxide formed by reactive plasma synthesis

Padmanabhan, P V A; Sreekumar, K P; Thiyagarajan, T K; Satpute, R U; Bhanumurthy, K; Sengupta, P; Dey, G K; Warrier, K G K (Elsevier, 2006)

Nano-crystalline titanium dioxide finds extensive applications in photocatalytic degradation of harmful organic compounds pollutants in air and water. Synthesis and characterization of nano-crystalline TiO2TiO2 powder by ...
Tailoring the microwave dielectric properties of Ba(Mg1/3Ta2/3)O-3 ceramics

Sebastian, M T; Surendran, K P (Elsevier, 2006)

Ba(Mg1/3Ta2/3)O-3 (BMT) is a very important microwave dielectric resonator material with a high dielectric constant of about 25, high quality factor and small temperature variation of resonant frequency. The preparation ...
Effect of calcination temperature and heating rate on the optical properties and reactivity of rice husk ash

Sathy Chandrasekhar; Pramada, P N; Jisha Majeed (Springer, 2006)

Rice husk is an agricultural waste and its conversion to value added products makes it a secondary resource material. On heating, rice husk gives ash with > 90% by weight of silica with some carbon and other nonmetallic ...
Rice husk ash as an adsorbent for methylene blue-effect of ashing temperature

Sathy Chandrasekhar; Pramada, P N (Springer, 2006)

Utilization of one waste material to control pollution caused by another is of high significance in the remediation of environmental problems. Rice husk, an abundantly available agricultural waste, can be used as a low ...
Iron minerals and their influence on the optical properties of two Indian kaolins

Sathy Chandrasekhar; Ramaswamy, S (Elsevier, 2006)

Kaolin is mostly associated with minor quantities of ancillary minerals containing transition elements such as iron and titanium. These ions impart color to the white kaolin which adversely affects its application in paper ...
Evaluation of Cyanex 923-coated magnetic particles for the extraction and separation of lanthanides and actinides from nuclear waste streams

Shaibu, B S; Reddy, M L P; Bhattacharya, A; Machanda, V K (Elsevier, 2006)

In the magnetically assisted chemical separation (MACS) process, tiny ferromagnetic particles coated with solvent extractant are used to selectively separate radionuclides and hazardous metals from aqueous waste streams. ...
Equal channel angular pressing of pure aluminium - an analysis

Saravanan, M; Pillai, R M; Pai, B C; Brahmakumar, M; Ravi, K R (Indian Academy of Science, 2006)

Equal channel angular pressing (ECAP) is a novel technique for producing ultra fine grain structures in submicron level by introducing a large amount of shear strain into the materials without changing the billet shape or ...
Microwave dielectric and elastic properties of glass-added Ba6-3xR8+2xTi18O54 (x=2/3)

Santha, A; Sebastian, M T; Vimala George; Philip, J (Elsevier, 2006)

Microwave dielectric properties of Ba6-3xSm8+2xTi18O54(x=2/3) [BST] ceramics with the addition of 0-3wt.% of various glasses have been studied. It has been found that the addition of 0.5wt.% of the glasses decreases the ...
Hierarchical self-assembly of donor-acceptor-substituted butadiene amphiphiles into photoresponsive vesicles and gels

Saleesh Kumar, N S; Varghese, S; Narayanan, G; Suresh, Das (Wiley, 2006)

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