2008: Recent submissions

Now showing items 81-100 of 172

Solid state optical properties of 4-alkoxy-pyridine butadiene derivatives: Reversible thermal switching of luminescence

Saleesh Kumar, N S; Shinto Varghese; Rath, N P; Suresh Das (American Chemical Society, 2008)

The synthesis and optical properties of a series of alkoxyphenyl-pyridyl butadiene derivatives in solution and in the solid state are described. All the derivatives were practically nonfluorescent in solution but showed ...
Synthesis, structure analysis, and microwave dielectric properties of LnTiSb(x)Ta(1-x)O(6) (Ln=Ce, Pr, and Nd) ceramics

Padma Kumar, H; Shyla Joseph; Sam Solomon; Manoj Raama Varma; Thomas, J K (Wiley, 2008)

LnTiSb(x)Ta(1-x)O(6) ceramics were prepared by the conventional solid-state ceramic route for x=0, 0.05, 0.1, 0.15, and 0.2. The structures of the materials were analyzed using X-ray diffraction techniques. The cell ...
Dynamics of sustainable grazing fauna and effect on performance of gas biofilter

Krishnakumar, B; Anupama, V N; Manilal, V B; Ajit Haridas (Society for Biotechnology, Japan, 2008)

The inherent operational problems of biofilters such as a pressure drop increase and nutrient limitations were managed in a toluene-removing gas biofilter with a sustainable grazing fauna consisting of micrometazoa and ...
Effect of Nb2O5 Substitution on the dielectric characteristics of DyTiTaO6 microwave ceramics

Joseph, J T; Kumar, H P; Manoj Raama Varma; Thomas, J K; Sam Solomon (Elsevier, 2008)

Ceramic materials of the type DyTiNbxTa1-xO6 Were prepared by conventional solid-state route for different values of x. The materials were characterized by X-ray diffraction and Scanning Electron Microscopy. Dysprosium ...
Synthesis and biological activity of a novel compound: (C(6)F(5))(2)SbPh

Kant, R; Singhal, K; Shukla, S K; Chandrashekar, K; Saxena, A K; Ranjan, A; Raj, P (Taylor & Francis, 2008)

A novel organoantimony compound "(C(6)F(5))(2)SbPh" was synthesized in high yields by modified method and evaluated for insecticidal and antimicrobial activities. The compound was very effective against polyphagous insect ...
Al2O3 @ TiO2-A simple sol-gel strategy to the synthesis of low temperature sintered alumina-aluminium titanate composites through a core-shell approach

Jayasankar, M; Ananthakumar, S; Mukundan, P; Wunderlich, W; Warrier, K G K (Elsevier, 2008)

A simple sol-gel based core-shell approach for the synthesis of alumina-aluminium titanate composite is reported. Alumina is the core and titania is the shell. The coating of titania has been performed in aqueous medium ...
Hydrogen-bonding-induced conformational change from J to H aggregate in novel highly fluorescent liquid-crystalline perylenebisimides

Jancy, B; Asha, S K (American Chemical Society, 2008)

A series of highly fluorescent liquid-crystalline perylenebisimide molecules having amide or ester linkage and end-capped by phenyl, monododecyloxy phenyl, or tridodecyloxy phenyl units have been synthesized and fully ...
Mechanical properties and water sorption behavior of phenol-formaldehyde hybrid composites reinforced with banana fiber and glass fiber

Seena Joseph; Sreekala, M S; Peter Koshy; Sabu Thomas (Wiley, 2008)

Banana fiber, which is rich in cellulose, relatively inexpensive, and abundantly available, has potential for polymer reinforcement. This study explores the merits of combining high-modulus glass fibers with banana fiber ...
Defected ground structure to reduce mutual coupling between cylindrical dielectric resonator antennas

Guha, D; Biswas, S; Joseph, T; Sebastian, M T (The Institution of Engineering and Technology-IET, 2008)

Use of a simple ring-shaped defected ground structure is experimentally demonstrated to suppress considerable mutual coupling between two cylindrical dielectric resonators. About 5 dB suppression has been obtained near the ...
Hydrolysis of pectin: An enzymatic approach and its application in banana fiber processing

Nicemol Jacob; Niladevi, K N; Anisha, G S; Prema, P (Elsevier, 2008)

Sediment samples were collected from different estuarine and marine areas along the West coast of India. Eighteen actinomycete cultures were isolated using starch casein agar and were screened for polygalacturonase activity ...
Expanded porphyrins as third order non-linear optical materials: Some structure-function correlations

Gokulnath, S; Chandrashekar, T K (Indian Academy of Sciences/ Springer, 2008)

In this paper, the non-linear optical properties of representative core-modified expanded porphyrins have been investigated with an emphasis on the structure-property relationship between the aromaticity and conformational ...
Vibrational studies and microwave dielectric properties of a-site-substituted tellurium-based double perovskites

Dias, A; Subodh, G; Sebastian, M T; Lage, M M; Moreira, R L (American Chemical Society, 2008)

A(2)MgTeO(6) (A = Ba, Sr, Ca) ceramics were prepared by solid-state route and their microstructure and microwave dielectric properties, as well as the vibrational phonon modes were investigated using the resonance method ...
One-pot synthesis of core-modified meso-aryl calix[5]phyrin and N-fused [24]Pentaphyrin

Gokulnath, S; Chandrashekar, T K (American Chemical Society, 2008)

Synthesis and characterization of core-modified meso-aryl calix[5]phyrins and N-fused pentaphyrins are reported.
Synthesis of novel heterocyclic calixarenes via the Diels-Alder reaction of calix[4]bis(spirodienones)

Ganga, V B; Suresh, E; Suresh, C H; Luxmi Varma, R (CSIR, 2008)

The reactivity of calix[4]bis(spirodienones) depends on the nature of the dienophile used. With 1,4-benzoquinones it acts as a 4 pi component whereas with 1,2-benzoquinones as a 2 pi system, yielding benzodioxin derived ...
Acridine-viologen dyads: Selective recognition of single-strand DNA through fluorescence enhancement

Elizabeth Kuruvilla; Nandajan, P C; Schuster, G B; Ramaiah, D (American Chemical Society, 2008)

Tolylacridine-viologen dyads show distinct fluorescence emission changes in the presence of double-strand DNA (dsDNA) and single-strand DNA (ssDNA) depending on the position of the linkage. The para isomer shows fluorescence ...
Novel 1,3-dipolar cycloaddition reactions of calix[4]bis(spirodienones): synthesis of isoxazolidine derived macrocycles

Ganga, V B; Suresh, E; Luxmi Varma, R (Elsevier, 2008)

Calix [4]bis(spirodienones) can perform as either 4 pi or 2 pi components in cycloaddition reactions with various carbo- and heterodienophiles and with 1,2-benzoquinones leading to the formation of highly functionalized ...
Raman scattering and infrared spectroscopy of chemically substituted Sr(2)LnTaO(6) (Ln = Lanthanides, Y, and In) double perovskites

Dias, A; Abdul Khalam, L; Sebastian, M T; Lage, M M; Matinaga, F M; Moreira, R L (American Chemical Society, 2008)

Sr(2)LnTaO(6) (Ln = lanthanides, Y, and In) ceramics were prepared by a solid-state route, and their vibrational phonon modes were investigated using Raman and infrared (IR) spectroscopic techniques. Lorentzian lines were ...
New perovskite type oxides: NaATiMO(6) (A=Ca or Sr; M=Nb or Ta) and their electrical properties

Deepthi, N R; Ravindran Nair, K; Prabhakar Rao, P; Sibi, K S; Peter Koshy; Vaidyan, V K (Elsevier, 2008)

New oxides of the type, NaATiMO(6) (M= Ca or Sr; M=Nb or Ta), have been prepared by the solid state reaction technique. Phase identification by powder X-ray diffraction (XRD) shows that NaCaTiMO6 have orthorhombic perovskite ...
Divergent nanostructures from identical ingredients: Unique amphiphilic micelle template for polyaniline nanofibers, tubes, rods, and spheres

Anilkumar, P; Jayakannan, M (American Chemical Society, 2008)

Here, we report a unique soft templating approach based oil all in-built amphiphilic azobenze-nesulfonic acid for tuning various types of polyaniline nanomaterials Such as fibers, rods, spheres, and tubes. The dopant ...
Random and AB diblock copolymers of tricyclodecanemethanol urethane methacrylate with styrene: Synthesis and morphology characterization

Deepak, V D; Asha, S K (Wiley, 2008)

A monomer design having a bulky terminal tricyclodecane (TCD) unit linked via hydrogen bondable urethane to an ethyleneoxy methacrylate unit, and capable of generating three-dimensional honeycomb patterns upon solvent ...

Now showing items 81-100 of 172

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