Browsing 2006 by Title

Now showing items 1-20 of 197

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 ...
3-phenyl-4-benzoyl-5-isoxazolonate complex of Eu3+ with tri-n-octylphosphine oxide as a promising light-conversion molecular device

Rani Pavithran; Saleesh Kumar, N S; Biju, S; Reddy, M L P; Junior, S A; Freire, R O (American Chemical Society, 2006)

Three new europium complexes, [Eu(PBI)(3)(.)3H(2)O] (1), [Eu(PBI)(3)(.)2TOPO] (2), and [Eu(PBI)(3)(.)2TPPO(.)H(2)O] (3) (where HPBI, TOPO, and TPPO stand for 3-phenyl-4-benzoyl-5-isoxazolone, tri-n-octylphosphine oxide, ...
[6+3] cycloaddition of pentafulvenes with 3-oxidopyrylium betaine: a novel methodology toward the synthesis of 5-8 fused oxabridged cyclooctanoids

Syam Krishnan, K; Sajisha, V S; Anas, S; Suresh, C H; Bhadbhade, M M; Bhosekar, G V; Radhakrishnan, K V (Elsevier, 2006)

Pentafulvenes undergo a facile [6+3] cycloaddition with 3-oxidopyrylium betaine, generated from the corresponding pyranulose acetate, leading to the formation of 5-8 fused oxabridged cyclooctanoids. The product is formed ...
[8+2] Cycloadditions involving 8-aryl-8-azaheptafulvenes and activated styrenes: efficient synthesis of dihydro-1-azaazulenes

Vijay Nair, G; Abhilash, K G (Elsevier, 2006)

Efficient [8+2] cycloaddition reactions of 8-aryl-8-azaheptafulvenes with doubly activated styrenes, leading to a facile synthesis of 1-aza-2-aryl-dihydroazulene derivatives are described.
Activation of the NC-H bond of Baylis-Hillman adducts of N-methylisatin with CAN/ROH

Shanmugam, P; Vaithyanathan, V; Baby Viswambharan (Elsevier, 2006)

A facile method for activation of the NC-H bond of N-methylisatin and Baylis-Hillman adducts of N-methylisatin with cerium ammonium nitrate (CAN) and saturated and unsaturated alcohols is reported. Adducts bearing an ester ...
Advances in mushroom research in the last decade

Fan, L; Pan, H; Soccol, A T; Pandey, A; Soccol, C R (Faculty Food technology and Biotechnology, 2006)

There has been a lot of progress in mushroom science and biotechnology in the last decade. The optimization of PFGE separation of fungal chromosomes allowed the study of the molecular karyotype of mushrooms and the assignment ...
Alpha-amylases from microbial sources - An overview on recent developments

Swetha, S; Dhanya, G; Nampoothiri, K M; Soccol, C R; Pandey, A (Faculty Food technology and Biotechnology, 2006)

This review covers the progress made in research on microbial alpha-amylase, a highly demanded industrial enzyme in various sectors such as food, pharmaceuticals, textiles, detergents, etc. Amylases are of ubiquitous ...
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 ...
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 ...
Aromaticity-driven rupture of CN triple and CC double bonds: Mechanism of the reaction between Cp2Ti(C4H4) and RCN

Suresh, C H; Koga, N (American Chemical Society, 2006)

The mechanism of the unique reaction Of Cp2Ti(C4H4) with MeCN yielding benzene and pyridine is unraveled using the DFT method. This reaction is characterized by the cleavage of two CC double bonds and one CN triple bond. ...
Bioconversions of Ferulic Acid, an Hydroxycinnamic Acid

Sindhu Mathew; Emilia Abraham, T (Informa Healthcare, 2006)

Ferulic acid is the most abundant hydroxycinnamic acid in the plant world and is ester linked to arabinose, in various plant polysaccharides such as arabinoxylans and pectins. It is a precursor to vanillin, one of the most ...
Broadband elliptical dielectric resonator antenna

Bijumon, P V; Sreedevi K Menon; Suma, M N; Lethakumary, B; Sebastian, M T; Mohanan, P (Wiley, 2006)

A broadband low-loss elliptical dielectric resonator antenna (DRA) excited by using the microstrip-line technique is proposed. The effect of geometrical modifications of the microstrip feed line on the gain, bandwidth, and ...
Broadband elliptical dielectric resonator antenna

Bijumon, P V; Sreedevi K Menon; Suma, M N; Lethakumary, B; Sebastian, M T; Mohanan, P (Wiley, 2006)

A broadband low-loss elliptical dielectric resonator antenna (DRA) excited by using the microstrip-line technique is proposed. The effect of geometrical modifications of the microstrip feed line on the gain, bandwidth, and ...
CAN-Mediated Oxidative Addition of 1,3-Dicarbonyl Compounds to Methylenecyclopropanes: A Facile Synthesis of Spirocyclopropyl Dihydrofurans

Vijay Nair, G; Suja, T D; Kishor Mohanan (Thieme, 2006)

1,3-Dicarbonyl compounds react with methylenecyclopropanes by oxidation with CAN to give spirocyclopropyl dihydrofuran derivatives in good yields.
CAN-mediated stereoselective cyclization of epoxypropyl cinnamyl amines to 3,4,5-trisubstituted piperidines and supramolecular assembly of the latter aided by ethyl acetate

Vijay Nair, G; Mohanan, K; Suja, T D; Suresh, S (Elsevier, 2006)

The stereoselective intramolecular cyclization of epoxypropyl cinnamyl amines mediated by substoichiometric quantities of CAN leading to the synthesis of functionalized piperidines and the formation of a supramolecular ...
Chaos game representation for comparison of whole genomes

Jijoy Joseph; Roschen Sasikumar (Biomed central, 2006)

Background: Chaos game representation of genome sequences has been used for visual representation of genome sequence patterns as well as alignment-free comparisons of sequences based on oligonucleotide frequencies. However ...
Chemical Characterization and Pharmacological Screening of Some Annona Seed Oils

Beena Joy; Gopi, T V; Sobhana, D (Asian Publication Corporation, 2006-04)

Seed oils from the indigenous species, viz., Annona squamosa, Annona muricata and Annona reticulata belonging to Annonaceae family have been analyzed for their physico-chemical properties. Major fatty acids identified from ...
Chemical modification of papain for use in alkaline medium

Sangeeta, K; Emilia Abraham, T (Elsevier, 2006)

Chemical modification is a useful method to recognize and modify functional determinants of enzymes. Papain, an endolytic cysteine protease (EC3.4.22.2) from Carica papaya latex has been chemically modified using different ...
Chemical substitution in Ba(RE1/2Nb1/2)O-3 (RE = La, Nd, Sm, Gd, Tb, and Y) microwave ceramics and its influence on the crystal structure and phonon modes

Dias, A; Abdul Khalam, L; Sebastian, M T; Paschoal, C W A; Moreira, R L (American Chemical Society, 2006)

Raman spectroscopy was employed to evaluate the crystal structure and phonon modes of chemically substituted Ba(RE1/2Nb1/2)O-3 microwave ceramics (RE = La, Nd, Sm, Gd, Tb, and Y). It was verified that these materials could ...
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 ...

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