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Now showing items 1-20 of 197

Chemistry of squaraine-derived materials: Near-IR dyes, low band gap systems, and cation sensors

Ajayaghosh, A (American Chemical Society, 2006)

Squaraines belong to an important class of organic dyes with intense absorption and emission properties in the visible to near- IR wavelength range. The optical properties of squaraines, which are sensitive to the surrounding ...
Analogues of the Quararibea metabolite chiral enolic-gamma-lactone from (2S,3S)- and (2S,3R)-tetrahydro-3-hydroxy-5-oxo-2,3-furandicarboxylic acids

Chithra Gopinath; Salini Thomas; Mangalam S Nair; Ibnusaud, I (Elsevier, 2006)

Reaction of dialkyl (2S,3S)- or (2S,3R)-tetrahydro-3-hydroxy-5-oxo-2,3-furandicarboxylates with POCl3 in pyridine followed by diazomethane resulted in the isolation of dialkyl 2S-4-methoxy-5-oxo-2,5-dihydro-2,3-furandica ...
22 pi smaragdyrin molecular conjugates with aromatic phenylacetylenes and ferrocenes: Syntheses, electrochemical, and photonic properties

Misra, R; Kumar, R; Chandrashekar, T K; Suresh, C H; Nag, A; Goswami, D (American Chemical Society, 2006)

Syntheses, spectroscopic, electrochemical, and third-order nonlinear optical susceptibilities of a series of 22 pi smaragdyrins and their corresponding Rh(I) derivatives bearing phenylacetylene substituents and ...
Effects of various process parameters on the production of gamma-linolenic acid in submerged fermentation

Ahmed, S U; Singh, S K; Pandey, A; Kanjilal, S; Prasad, R B N (Faculty of Food Technology Biotechnology, 2006)

Studies were carried out on the fermentative production of gamma-linolenic acid (GLA) using seven strains belonging to Mucorales. An oleaginous fungal strain, isolated from the Western Ghats of Kerala produced GLA at a ...
Production and partial characterization of endoxylanase by Bacillus pumilus using agro industrial residues

Asha Poorna, C; Prema, P (Elsevier, 2006)

Agro industrial residues, cheap sources of energy have high potential in the area of fermentation for the production of lignocellulases. Different agro industrial waste products were evaluated as substrates in submerged ...
Jackfruit seed - A novel substrate for the production of Monascus pigments through solid-state fermentation

Babitha, S; Soccol, C R; Pandey, A (Faculty Food technology and Biotechnology, 2006)

Solid-state fermentation was carried out using jackfruit seed powder as substrate for the production of pigments using a fungal culture of Monascus purpureus. Due to the buffering nature of jackfruit seed powder, colour ...
Synthesis, characterization, and microwave dielectric properties of ATiO(3) (A=Co, Mn, Ni) ceramics

Anjana, P S; Sebastian, M T (American Ceramic Society, 2006)

The ATiO(3) (A = Co, Mn, Ni) dielectric ceramics have been synthesized by the conventional solid-state ceramic route. The structure and microstructure of these ceramic samples have been studied using powder X-ray diffraction ...
Mesoporous silica-alumina aerogels with high thermal pore stability through hybrid sol-gel route followed by subcritical drying

Aravind, P R; Mukundan, P; Krishna Pillai, P; Warrier, K G K (Elsevier, 2006)

Silica-alumina mixed oxide aerogels have been synthesised for the first time by subcritical method, having compositions of 5, 10, 15, 20 and 25 wt.% of alumina in silica through a hybrid sol-gel technique. Boehmite was ...
Microstructural, mechanical and thermal characterisation of sol–gel-derived aluminium titanate–mullite ceramic composites

Ananthakumar, S; Jayasankar, M; Warrier, K G K (Elsevier, 2006)

Aluminium titanate (AT)–mullite composites with different volume percentages of mullite were prepared using the sol–gel process. The effect of grain size and porosity on the strength, toughness and hardness of the composites ...
Self-location of acceptors as "isolated" or "stacked" energy traps in a supramolecular donor self-assembly: A strategy to wavelength tunable FRET emission

Ajayaghosh, A; Vijayakumar, C; Praveen, V K; Santhosh Babu, S; Reji Varghese (American Chemical Society, 2006)
From vesicles to helical nanotubes: A sergeant-and-soldiers effect in the self-assembly of oligo(p-phenyleneethynylene)s

Ajayaghosh, A; Reji Varghese; Mahesh, S; Praveen, V K (Wiley, 2006)

Coassembly of short molecular wires OPE1 with chiral analogues OPE2, both of which are CD silent, exhibited a sergeant-and-soldiers effect that resulted in transformation of vesicular aggregates of OPE1 into CD-active ...
Aromatic Core Modified Decaphyrins with the largest Two-Photon absorption cross-sections: Syntheses and Characterization

Rath, H; Prabhuraja, V; Chandrashekar, T K; Nag, A; Goswami, D; Joshi, B S (American Chemical Society, 2006)

Core-modified aromatic decaphyrins with 42π conjugated electrons exhibit the highest two-photon absorption cross-section value (σ2 = 108 000 GM) known for any organic molecule, suggesting possible device applications in ...
A simple and inexpensive method for rapid synthesis of MgB2 superconductor

Abhilash Kumar, R G; Vinod, K; Aloysius, R P; Syamaprasad, U (Elsevier, 2006)

MgB2 samples were prepared by a sealed tube method and a systematic study on phase formation at different reaction temperatures was conducted. Phase analysis and structural studies were carried out using XRD and SEM together ...
Photoinduced electron transfer in a-cyclodextrin-based supramolecular dyads: A free-energy-dependence study

Bijitha, B; Gopidas, K R (Wiley, 2006)

Photoinduced electron transfer (PET) between a-cyclodextrin-appended pyrene (PYCD) and a few acceptor molecules was studied in aqueous solutions. The pyrene moiety in PYCD is located above the narrower rim of the alpha-CD ...
A squaraine-based chemosensor for Hg2+ and Pb2+

Basheer, M C; Alex, S; George Thomas, K; Suresh, C H; Suresh Das (Elsevier, 2006)

A novel unsymmetrical cationic squaraine dye (USqH(+)), absorbing in the near-infrared region (600-850 nm), was synthesized by reacting a semi-squaric acid derivative 3-[4-(NN-dioctylamino)phenyl]-4-hydroxycyclobutene-1,2-dione ...
Microporous polyurethanes: Synthesis and investigation of the mechanism of the pore formation

Deepa, P; Jayakannan, M (Wiley, 2006)

A new approach for microporous polymeric material is developed utilizing the secondary interactions such as hydrogen bonding in the polymer chains in polyurethane systems at ambient conditions. A new series of highly rigid, ...
Formation of novel polycyclic cage compounds through 'uncaging' of readily accessible higher cage compounds

Beena James; Rath, N P; Suresh, E; Mangalam S Nair (Elsevier, 2006)

The synthesis of the novel cage compounds 7-halomethyl-8-(carbomethoxy)tetracyclo[4.2.1.1(4,7).0(2,5)]deca-3-(11)-ene-10-ones, methyl-4-methylene-6-oxopentacyclo[5.4.0.0.(2,5).0(3,10).0(7,9)]undecane-9-carboxylate, ...
Polyesters from renewable resources: Preparation and characterization

Bakare, I O; Pavithran, C; Okiemen, F E; Pillai, C K S (Wiley, 2006)

Polyesters were synthesized with monoglycerides prepared from rubber seed oil, a renewable resource. Monoglycerides were obtained by an alcoholysis method from the oil, which was neat or modified by treatments with different ...
Relation between growth, respirometric analysis and biopigments production from Monascus by solid-state fermentation

De Carvalho, J C; Pandey, A; Oishi, B O; Brand, D; Rodriguez-Leon, J A; Soccol, C R (Elsevier, 2006)

Solid-state fermentation was carried out to establish relation between growth, respirometric analysis and biopigments production from Monascus sp. in columns and in a drum-type bioreactor with forced air. In these reactors, ...
Evolution of nano- to microsized spherical assemblies of a short oligo(p-phenyleneethynylene) into superstructured organogels

Ajayaghosh, A; Reji Varghese; Praveen, V K; Mahesh, S (Wiley, 2006)

A subtle balance of H-bonding, π-stacking, and van der waals interactions facilitates the concentration-controlled self-assembly of a short molecular wire (see figure) into nanoparticles and fluorescent microspheres in ...

Now showing items 1-20 of 197

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