2005: Recent submissions

Now showing items 81-100 of 107

Mixed substrate fermentation for the production of phytase by Rhizopus spp. using oilcakes as substrates

Sumitra, R; Roopesh, K; Nampoothiri, K M; Szakacs, G; Pandey, A (Elsevier, 2005)

Commercially available oil cakes such as coconut oil cake (COC), sesame oil cake (SOC), palm kernel cake (PKC), groundnut oil cake (GOC), cottonseed oil cake (CSC) and olive oil cake (OOC) were used as substrates for phytase ...
Synthesis and photophysical studies of donor-acceptor substituted tetrahydropyrenes

Sumalekshmy, S; Gopidas, K R (Royal Society of Chemistry, 2005)

The tetrahydropyrene derivatives 2-N,N-dimethylamino-7-nitro-4,5,9,10-tetrahydropyrene (1) and 2-N, N-dimethylamino-7-acetyl-4,5,9,10 tetrahydropyrene(2) were synthesized and characterized. Photophysical properties of these ...
Reaction of aromatic amines with Cu(ClO4)2 in acetonitrile as a facile route to amine radical cation generation

Sumalekshmy, S; Gopidas, K R (Elsevier, 2005)

This Letter describes a very simple and effective method for the generation and study of radical cations of aromatic amines. It is shown that simple mixing of micro molar solutions of aromatic amines with micro molar amounts ...
Intramolecular charge transfer processes in donor-acceptor substituted vinyltetrahydropyrenes

Sumalekshmy, S; Gopidas, K R (Royal Society of Chemistry, 2005)

Two novel donor-acceptor-substituted vinyltetrahydropyrene derivatives, 2-N,N-dimethylamino-7(1-carbethoxyvinyl)-4,5,9,10-tetrahydropyrene,1, and 2-N,N-dimethylamino-7-(1,1-dicyanovinyl)-4,5,9,10-tetrahydropyrene, 2, were ...
Microbial cellulases - Production, applications and challenges

Rajeev K Sukumaran; Singhania, R R; Pandey, A (NISCAIR, 2005)

Microbial cellulases find applications in various industries and constitute a major group of the industrial enzymes. Recently, there is resurgence in utilization of biomass for fuel production employing cellulases and hence ...
In vitro studies on antioxidant activity of lignans isolated from sesame cake extract

Suja, K P; Jayalekshmy, A; Arumughan, C (John Wiley, 2005)

The antioxidant activity of compounds isolated from a methanolic extract of commercial sesame cake was studied using a peroxidation model and a radical-scavenging method. Pure compounds were isolated from the extract by ...
Anion induced modulation of self-assembly and optical properties in urea end-capped oligo(p-phenylenevinylene)s

Reji Varghese; Subi J George; Ajayaghosh, A (Royal Society of Chemistry, 2005)

The non-emissive supramolecular assembly of urea end-capped oligo(p-phenylenevinylene) flourophores turned strongly emissive in the presence of tetrabutylammonium flouride which has implications in the anion controlled ...
Synthesis and luminescent properties of novel europium(III) heterocyclic beta-diketone complexes with Lewis bases: Structural analysis using the Sparkle/AM1 model

Rani Pavithran; Reddy, M L P; Junior, S A; Freire, R O; Rocha, G B; Lima, P P (Wiley, 2005)

Tris(beta-diketonato)europium(III) complexes of general formula [Eu(TPI)(3)-L], with chelating ligands such as 3-phenyl-4-(4-toluoyl)-5-isoxazolone (HTPI) and adduct-forming reagents [L = H2O, tri-n-octylphosphane oxide ...
Core-modified expanded porphyrins with large third-order nonlinear optical response

Rath, H; Sankar, J; PrabhuRaja, V; Chandrashekar, T K; Amit Nag; Goswami, D (American Chemical Society, 2005)

In general, two-photon absorption (TPA/2PA) is a third-order nonlinear process, and the efficiency of the processes involving two-photon absorption require materials with large absorption cross sections. Research on the ...
Enhanced critical current density in (Bi,Pb)-2223/Ag tapes prepared using precursors calcined in dynamic vacuum with oxygen partial pressure

Prabitha, V G; Aloysius, R P; Guruswamy, P; Syamaprasad, U (Elsevier Science, 2005)

Superconducting properties of (Bi,Pb)-2223/Ag tapes prepared using four different precursors calcined under different conditions viz. (1) dynamic vacuum with oxygen partial pressure, (2) static vacuum, (3) static air and ...
Investigations on the liquid crystalline phases of cation-induced condensed DNA

Pillai, C K S; Neethu Sundaresan; Radhakrishnan Pillai, M; Thomas, T; Thomas, T J (Indian Academy of Sciences, 2005)

Viral and nonviral condensing agents are used in gene therapy to compact oligonucleotides and plasmid DNA into nanostructures for their efficient transport through the cell membranes. Whereas viral vectors are best by the ...
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 ...
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 ...
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 ...
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, ...
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 ...
Micromechanical modeling of hybrid composites

Babu, P E J; Savithri, S; Pillai, U T S; Pai, B C (Elsevier, 2005)

The main aim of this work is to study the effective elastic modulus of hybrid composites through micromechanical modeling. The micromechanical framework based on the generalized method of cells has been employed for this ...
An aqueous sol–gel route to synthesize nanosized lanthanadoped titania having an increased anatase phase stability for photocatalytic application

Baiju, K V; Sibu, C P; Rajesh Komban; Krishna Pillai, P; Mukundan, P; Warrier, K G K; Wunderlich, W (Elsevier, 2005)

A novel synthesis method is reported, involving peptisation and doping of lanthana on colloidal sol-gel titania derived from titanyl sulphate, where the anatase phase has a high stability above 800degreesC and a specific ...
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: ...

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