2007: Recent submissions

Now showing items 41-60 of 143

Evaluation of the marine algae Ulva fasciata and Sargassum sp for the biosorption of Cu(II) from aqueous solutions

Karthikeyan, S; Balasubramanian, R; Iyer, C S P (Elsevier, 2007)

In this study, the adsorption properties of two different marine algae (Ulva fasciata (green algae) and Sargassum sp. (brown algae)) were investigated. Equilibrium isotherms and kinetics were studied to evaluate the relative ...
Microwave dielectric properties of CeO2-0.5AO-0.5TiO(2) (A = Ca, Mg, Zn, Mn, Co, Ni, W) ceramics

Anjana, P S; Sebastian, M T; Axelsson, A-K; Alford, N McN (Elsevier, 2007)

Microwave dielectric ceramic materials based on cerium [CeO2-0.5AO-0.5TiO(2) (A= Mg, Zn, Ca, Mn, Co, Ni, W)] have been prepared by a conventional solid state ceramic route. The crystal structure was studied by X-ray ...
PTFE/Sr2Ce2Ti5O16 polymer ceramic composites for electronic packaging applications

Subodh, G; Pavithran, C; Mohanan, P; Sebastian, M T (Elsevier, 2007)

Sr2Ce2Ti5O16 ceramics filled PTFE composites were prepared by powder processing technique. The structure and microstructure of the composites were investigated by X-ray diffraction and scanning electron microscopic methods. ...
Effect of dopants on microwave dielectric properties of Ba(Zn1/3Nb2/3)O-3 ceramics

Manoj Raama Varma; Sebastian, M T (Elsevier, 2007)

Ba(Zn1/3Nb2/3)O-3 (BZN) has been prepared with various amounts of different dopants such as oxides of monovalent, divalent, trivalent, tetravalent, pentavalent and hexavalent elements. Effect of these dopants on microwave ...
A compact hybrid CPW fed planar monopole/dielectric resonator antenna

Suma, M N; Bijumon, P V; Sebastian, M T; Mohanan, P (Elsevier, 2007)

Design of hybrid antenna consisting of a coplanar waveguide (CPW) fed printed monopole and cylindrical dielectric resonator is presented in this paper. A CPW fed printed monopole acts as an effective radiator and excites ...
Raman-spectroscopic investigations on the crystal structure and phonon modes of Ba(RE1/2Ta1/2)O-3 microwave ceramics

Moreira, R L; Abdul Khalam, L; Sebastian, M T; Dias, A (Elsevier, 2007)

Complex Ba((RETa1/2)-Ta-1/2)O-3 [RE= rare earth] ceramics have been prepared by solid state ceramic route and their microwave dielectric responses were measured in the GHz range. In general, the resonators showed high ...
FDTD analysis of rectangular dielectric resonator antenna

Mohanan, P; Mridula, S; BinuPaul; Suma, M N; Bijumon, P V; Sebastian, M T (Elsevier, 2007)

The paper presents basics of electromagnetic theory and dielectric resonator antennas, fundamental concepts of FDTD and some significant results of the FDTD analysis of rectangular dielectric resonator antennas (RDRA)
Spores of Aspergillus niger as reservoir of glucose oxidase synthesized during solid-state fermentation and their use as catalyst in gluconic acid production

Ramachandran, S; Fontanille, P; Pandey, A; Larroche, C (Blackwell Publishing, 2007)

Aims: To exploit conidiospores of Aspergillus niger as a vector for glucose oxidase extraction from solid media, and their direct use as biocatalyst in the bioconversion of glucose to gluconic acid. Methods and Results: ...
Microwave dielectric properties of novel lithium containing pyrochlore type oxides: Li3Sm3-xBixTi7Nb2O25 (x=0, 1, 2 or 3)

Prabhakar Rao, P; Ravindran Nair, K; Peter Koshy; Vaidyan, V K (Elsevier, 2007)

Microwave dielectric properties of novel lithium ion containing pyrochlore type oxides: Li3Sm3-xBixTi7Nb2O25 (x=0, 1, 2 or 3) have been reported in this paper. Powder X-ray diffraction patterns show that these oxides have ...
Enhanced photoactivity and anatase thermal stability of silica-alumina mixed oxide additives on sot-gel nanocrystalline titania

Baiju, K V; Periyat, P; Krishna Pillai, P; Mukundan, P; Warrier, K G K; Wunderlich, W (Elsevier, 2007)

Nanocrystalline titania with silica and silica-alumina mixed oxide as additives has been prepared through a sequential approach sot-gel method starting from titanyl sulphate in aqueous medium. The mixed oxide added titania ...
Silica alcogels for possible nuclear waste confinement - A simulated study

Aravind, P R; Sithara, L; Mukundan, P; Krishna Pillai, P; Warrier, K G K (Elsevier, 2007)

A new method for possible incorporation of nuclear wastes has been attempted here by using silica alcogels as a host precursor for confinement. The large pore volume of the silica alcogel is used as a sponge to incorporate ...
Structural and superconducting properties of Bi1.7Pb0.4Sr2-xYbxCa1.1Cu2.1Oy system

Biju, A; Aloysius, R P; Syamaprasad, U (Elsevier, 2007)

The structural, electrical and superconducting properties of Bi1.7Pb0.4Sr2-xYbxCa1.1Cu2.1Oy system has been studied for different Yb concentrations. The samples are prepared by solid state synthesis in the polycrystalline ...
Low temperature synthesis of aluminium titanate by an aqueous sol-gel route

Jayasankar, M; Ananthakumar, S; Mukundan, P; Warrier, K G K (Elsevier, 2007)

Formation of aluminium titanate (AT) has been achieved at low temperature through sol-gel process using boehmite and titanium hydroxide as precursors by controlling the particle size at nanoscale followed by in-situ ...
Improved cellulase production by Trichoderma reesei RUT C30 under SSF through process optimization

Singhania, R R; Rajeev K Sukumaran; Pandey, A (Humana Press, 2007)

The major constraint in the enzymatic saccharification of biomass for ethanol production is the cost of cellulase enzymes. Production cost of cellulases may be brought down by multifaceted approaches which includes the use ...
Synthesis of an Al/MgAl2O4 in situ metal matrix composite from silica gel

Sreekumar, V M; Pillai, R M; Pai, B C; Chakraborty, M (Wiley, 2007)

An aluminum/MgAl2O4 in situ metal matrix composite has been synthesized using silica gel containing similar to 98% SiO2 in an Al-5Mg alloy. The thermodynamics and kinetics of MgAl2O4 formation have been discussed in detail. ...
CFD based investigations on hydrodynamics and energy dissipation due to solid motion in liquid fluidised bed

Panneerselvam, R; Savithri, S; Surender, G D (Elsevier, 2007)

CFD simulations are carried out for the prediction of flow patterns in a liquid-solid fluidised bed using Eulerian-Eulerian framework. The CFD model predictions are compared with the experimental findings reported by ...
New family of dielectric materials in ca-y-ti-nb-o system having pyrochlore type structure

Nair, K R; Prabhakar Rao, P; Anupama, V R; Joseph, S K; Chandran, M R; Peter Koshy (Blackwell Publishing, 2007)

A new family of pyrochlore-type oxides in the Ca-Y-Ti-Nb-O system has been prepared by the conventional solid-state route. These compounds have a dielectric constant (K) in the range 27-92 and, further, the dielectric ...
Low-temperature fine-grained alumina-aluminum titanate composites produced from a titania-coated alumina precursor

Mani, J; Ananthakumar, S; Mukundan, P; Warrier, K G K (Wiley, 2007)

A method for the preparation of alumina-aluminum titanate (AT) composites, which can be sintered to high density with a fine-grained microstructure at < 1450 degrees C, is reported. The composite precursor is alumina ...
Microwave dielectric properties of La(6)Mg(4)A(2)W(2)O(24) [A = Ta and Nb] ceramics

Rajamma, R; Sebastian, M T (Wiley, 2007)

The microwave dielectric properties of two A-site-deficient perovskite-type ceramics in the La(6)Mg(4)A(2)W(2)O(24) [A = Ta and Nb] system were investigated. The compounds were synthesized by the solid-state ceramic route. ...
Temperature-stable and low-loss dielectrics in the Ca(B ' Ta-1/2(1/2))O-3 [B ' = lanthanides, Y, and In] system

Abdul Khalam, L; Sherin Thomas; Sebastian, M T (Wiley, 2007)

The Ca(B'Ta-1/2(1/2))O-3 [B' = La, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Y, Er, Yb, and In] double perovskite-type ceramics have been prepared by the conventional solid-state ceramic route. The phase purity and surface morphology ...

Now showing items 41-60 of 143

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