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Now showing items 1-20 of 3243

A ratiometric fluorescence probe for selective visual sensing of Zn2+

Ajayaghosh, A; Priya Carol; Sreejith, S (American Chemical Society, 2005)

A simple ratiometric fluorescence probe based on vinylpyrrole end-capped bipyridine for the visual sensing of Zn2+ under aqueous physiological pH (6.8-7.4) is described. The fluorophores 3a-c showed strong emission around ...
Observation of a chiral smectic phase in azobenzene-linked bolaamphiphiles containing free sugars

Shibu Abraham; Paul, S; Narayan, G; Krishna Prasad, S; Shankar Rao, D S; Jayaraman, N; Suresh Das (Wiley, 2005)

Amphiphilic sugars exhibit both lyotropic and thermotropic liquid-crystalline behavior. Interestingly, in spite of the abundance of chiral centers in amphiphilic sugars, their liquid-crystalline phases do not exhibit ...
T-Strip-fed high-permittivity rectangular dielectric resonator antenna for broadband applications

Bijumon, P V; Sreedevi K Menon; Suma, M N; Lethakumari, B; Sebastian, M T; Mohanan, P (Wiley, 2005)

A rectangular low-density high-permittivity dielectric resonator antenna (DRA) excited by T-shaped microstrip feed offering a 2:1 VSWR bandwidth of similar to 22% at 2.975 GHz is reported. The design methodology, and ...
Biosoftening of arecanut fiber for value added products

Akhila Rajan; Jayalakshmi, G K; Emilia Abraham, T (Elsevier, 2005)

The arecanut husk fibers are predominantly composed of cellulose and varying proportions of hemicellulose, lignin, pectin and protopectin. Microbes that selectively remove lignin without loss of appreciable amounts of ...
H NMR spectral evidence for a specific host-guest complexation induced charge localization in squaraine dyes

Ajayaghosh, A; Arunkumar, E (American Chemical Society, 2005)

Experimental support is provided for the charge localization in squaraines, a class of fundamentally and technologically important organic dyes, by H-1 NMR analysis through a host-guest complexation approach. Specific ...
Biosoftening of coir fiber using selected microorganisms

Akhila Rajan; Resmi, C S; Pavithran, C; Emilia Abraham, T (Springer, 2005)

Coir fiber belongs to the group of hard structural fibers obtained from coconut husk. As lignin is the main constituent of coir responsible for its stiffness, microbes that selectively remove lignin without loss of appreciable ...
A facile 1,2 proton migration of chalcone epoxide using acid activated palygorskites

Beena Joy; Ghosh, S K; Padmaja, P; Lalithambika, M (Elsevier, 2005)

Different natural as well as modified palygorskite clays, Padappakkara blue (Kaolinite) and Zeolite 4A have been used to study the rearrangement of chalcone epoxide. Acid washed palygorskite clays have been identified as ...
Coconut fibre reinforced polyethylene composites:Effect of natural waxy surface layer of the fibre on fibre/matrix interfacial bonding and strength of composites

Brahmakumar, M; Pavithran, C; Pillai, R M (Elsevier, 2005)

Coconut fibre has been used as reinforcement in low-density polyethylene. The effect of natural waxy surface layer of the fibre on fibre/matrix interfacial bonding and composite properties has been studied by single fibre ...
Tailoring the microwave dielectric properties of Ca5Ta2TiO12 ceramics through glass addition

Bijumon, P V; Sebastian, M T (Blackwell Publishing, 2005)

Microwave dielectric properties of polycrystalline Ca5Ta2TiO12 ceramics have been tailored using different glass additives. Several glasses such as B2O3, SiO2, B2O3-SiO2, ZnO-B2O3, Al2O3-SiO2, Al2O3-B2O3-SiO2, BaO-B2O3-SiO2, ...
Proton controlled intramolecular photoinduced electron transfer (PET) in podand linked squaraine-aniline dyads

Arunkumar, E; Ajayaghosh, A (Royal Society of Chemistry, 2005)

Proton controlled intramolecular PET from an aniline moiety to a squaraine chromophore, attached to podand chains is reported, which to our knowledge is the first example where a squaraine dye is involved as an electron ...
Enhanced critical current density in (Bi,Pb)-2223 superconductor by Nd addition in low percentages

Aloysius, R P; Guruswamy, P; Syamaprasad, U (Elsevier, 2005)

Phase evolution and superconducting properties of Nd added (Bi, Pb)-2223 superconductors in bulk form were studied. The amount of Nd was varied from 0.005 to 0.030 on a general stoichiometry of Bi:Pb:Sr:Ca:Cu = 1.85: ...
Low temperature process for the synthesis of rutile phase titania through vapor phase hydrolysis

Ani, K J; Surender, G D (Springer, 2005)

Studies the low temperature process for the synthesis of rutile phase titania through vapor phase hydrolysis. Details of the major finding in the study; Proposal of a possible mechanism based on hydrolysis reaction and the ...
The buoyant filter bioreactor: A high-rate anaerobic reactor for complex wastewater - process dynamics with dairy effluent

Ajit Haridas; Suresh, S; Chitra, K R; Manilal, V B (Elsevier, 2005)

A novel high-rate anaerobic reactor, called "Buoyant Filter Bioreactor" (BFBR), has been developed for treating lipid-rich complex wastewater. The BFBR is able to decouple the biomass and insoluble COD retention time from ...
Highly enhanced critical current density in Pr-added (Bi, Pb)-2212 superconductor

Aloysius, R P; Guruswamy, P; Syamaprasad, U (Institute of Physics, 2005)

The effect of Pr addition on the superconducting properties of the (Bi, Pb)-2212 system in the bulk polycrystalline form was studied. The Pr content was varied from x = 0.0 (pure) to 0.5 on a general stoichiometry of ...
Near-infrared fluorescent probes: Synthesis and spectroscopic investigations of a few amphiphilic squaraine dyes

Arun, K T; Ramaiah, D (American Chemical Society, 2005)

With the objective of developing near-infrared fluorescence probes for biological applications, a few squaraine dyes 3a-d, containing amphiphilic substituents, were synthesized and their photophysical properties have been ...
Selective calcium ion sensing with a bichromophoric squaraine foldamer

Arunkumar, E; Ajayaghosh, A; Daub, J (American Chemical Society, 2005)

Several squaraine tethered bichromophoric podand systems 1a-d and a monochromophoric analogue 2 were prepared and characterized. Among these, the bichromophore, 1b, containing five oxygen atoms in the flexible podand moiety ...
New pyrochlore type semiconducting ceramic oxides: Ca3Ce3-xBixTi7Nb2O26.5(x=0.5, 1.0, 2.0, or 3.0) - structure, microstructure and electrical properties

Prabhakar Rao, P; Ravindran Nair, K; Seema, K V; Peter Koshy; Vaidyan, V K (Springer, 2005)

Oxides of the pyrochlore family have a general formula A2B2O7 and they have been extensively studied because of their wide spectrum of physical properties including electrical, magnetic, optical, dielectric, and catalytic ...
Purification, characterization and some studies on secondary structure of tannase from Aspergillus awamori nakazawa

Mahapatra, K; Nanda, R K; Sekher Bag, S; Rintu Banerjee; Pandey, A; Szakacs, G (Elsevier Science, 2005)

Tannase (tannin acyl hydrolase EC 3.1.1.20) produced by Aspergillus awamori nakazawa was purified and characterized. Optimal conditions of production were determined using varying substrate combinations and studying ...
Synthesis of xanthate functionalized silica gel and its application for the preconcentration and separation of uranium(VI) from inorganic components

Gopi Krishna, P; Mary Gladis, J; Prasada Rao, T; Naidu, G R K (Springer, 2005)

A new chelating solid extractant prepared by the chemical immobilization of xanthate on silica gel was characterized by Fourier transform infra red spectrometry (FTIR), thermogravimetric analysis (TGA) and microanalysis ...
Effect of Sm addition on (Bi,Pb)-2212 superconductor

Prabitha, V G; Biju, A; Abhilash Kumar, R G; Sarun, P M; Aloysius, R P; Syamaprasad, U (Elsevier Science, 2005)

The effect of Sm addition on the superconducting properties of (Bi,Pb)-2212 system in bulk polycrystalline form was studied. The Sm content was varied from x=0.0 (pure) to 0.5 on a general stoichiometry of Bi1.7Pb0.4Sr2. ...

Now showing items 1-20 of 3243

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