2007: Recent submissions

Now showing items 81-100 of 143

Synthesis of 3-heteroaryl-substituted tetrahydrofurans from the Baylis-Hillman adducts of heteroarylaldehydes by n-Bu3SnH-mediated 5-exo-trig vinyl radical cyclization

Shanmugam, P; Rajasingh, P; Baby Viswambharan; Vaithiyanathan, V (Taylor & Francis, 2007)

The synthesis of 3-heteroaryl-substituted tetrahydrofurans from the propargyl derivative of Baylis-Hillman adducts of heteroaryl aldehydes by n-Bu3SnH- mediated 5-exo-trig vinyl radical cyclization in high yield is reported.
Effect of stress on growth, pigment production and morphology of Monascus sp. in solid cultures

Babitha, S; Soccol, C R; Pandey, A (Wiley, 2007)

The aim of the current work was to study the influence of stress on pigment production in Monascus purpureus under solid-state fermentation. Thermal stress was induced by incubating the culture at various high temperatures. ...
Effect of aging temperature on the porosity characteristics of subcritically dried silica aerogels

Smitha, S; Shajesh, P; Rajesh Kumar, S; Krishna Pillai, P; Warrier, K G K (Springer, 2007)

Silica aerogels were synthesised by subcritical drying technique which involves controlled solvent exchange and aging of the wet gel in silane solution followed by drying under controlled conditions. Effect of temperature ...
Interplay of dual reactivity in the reaction of pentafulvenes with 1,2,4-triazoline-3,5-diones: Experimental and theoretical investigations

Anas, S; Syam Krishnan, K; Sajisha, V S; Anju, K S; Radhakrishnan, K V; Suresh, E; Suresh, C H (Royal Society of Chemistry, 2007)

A detailed investigation on the reaction of pentafulvenes with N-substituted-1,2,4-triazoline-3,5-diones leading to the formation of five- and seven-membered azapolycycles is described. The observed reactivity is explained ...
Effect of tantalum addition on anatase phase stability and photoactivity of aqueous sol-gel derived mesoporous titania

Baiju, K V; Shajesh, P; Wunderlich, W; Mukundan, P; Kumar, S R; Warrier, K G K (Elsevier, 2007)

The effect of the addition of tantalum to nanocrystalline titania matrix on the photocatalytic activity is presented. The tantalum addition increases the anatase phase stability to above 1000 degrees C by inhibiting the ...
Studies on the reactivity of calix[4]arene derived bis(spirodienone) with carbo- and hetero-dienophiles and dichlorocarbene: synthesis of highly functionalized macrocycles

Ganga, V B; Sreeja, T; Suresh, E; Luxmi Varma, R (Elsevier, 2007)

Calix[4]arene derived bis(spirodienone) can act as a 4 pi component in cycloaddition reaction with a variety of carbo- and heterodienophiles yielding the bisadducts in excellent to quantitative yields. Bis(spirodienone) ...
Design and synthesis of squaraine based near infrared fluorescent probes

Basheer, M C; Santhosh, U; Alex, S; George Thomas, K; Suresh, C H; Suresh Das (Elsevier, 2007)

A novel class of dialkylanthracene containing squaraine dyes (Sq1-3) possessing intense absorption and emission in the NIR region has been synthesized. Structural and electronic features investigated using DFT methods ...
Smaragdyrin–Azobenzene conjugates: Syntheses, structure, and spectral and electrochemical properties

Gokulnath, S; Prabhuraja, V; Sankar, J; Chandrashekar, T K (Wiley, 2007)

The syntheses, characterization, and spectral properties of smaragdyrin–azobenzene conjugates are reported. Our synthetic strategy involves linking the azobenzene group in one of the precursors to a dipyrromethane subunit, ...
Aggregation properties of heavy atom substituted squaraine dyes: Evidence for the formation of J-type dimer aggregates in aprotic solvents

Saji Alex; Basheer, M C; Arun, K T; Ramaiah, D; Suresh Das (American Chemical Society, 2007)

The squaraine dye bis(2,4,6-trihydroxyphenyl)squaraine (SqH) was earlier reported to form J-type dimer aggregates in acetonitrile solutions at higher concentrations. Subsequent studies have suggested that concentration-dependent ...
Electrostatic potential minimum of the aromatic ring as a measure of substituent constant

Suresh, C H; Gadre, S R (American Chemical Society, 2007)

The molecular electrostatic potential minimum (V-min) observed for the arene pi system of a substituted benzene derivatives is found to correlate linearly with the substituent constant sigma(p)degrees. The use of V-min as ...
A review of DNA functionalized/grafted carbon nanotubes and their characterization

Sobhi Daniel; Prasada Rao, T; Rao, K S; Usha Rani, S; Naidu, G R K; Lee, Hea-Yeon; Kawai, T (Elsevier, 2007)

The functionalized carbon nanotubes (CNTs) are believed to be very promising in the fields such as preparation of functional and composite materials and biological technologies. Immobilization of nanotubes with specific ...
Molecularly imprinted polymer (biomimetic) based potentiometric sensor for atrazine

Prasad, K; Prathish, K P; Mary Gladis, J; Naidu, G R K; Prasada Rao, T (Elsevier, 2007)

A biomimetic potentiometric sensor was developed by dispersing the atrazine imprinted polymer particles in di-n-octyl phthalate plasticizer and then embedding in polyvinyl chloride matrix. The sensor responds to atrazine ...
Design and development of imprinted polymer inclusion membrane-based field monitoring device for trace determination of phorate (O,O-diethyl S-ethyl thiomethyl phophorodithioate) in natural waters

Prasad, K; Prathish, K P; Mary Gladis, J; Naidu, G R; Prasada Rao, T (Wiley, 2007)

A biomimetic potentiometric field monitoring device was developed for the trace determination of phorate (O,O-diethyl S-ethyl thiomethyl phophorodithioate) in natural waters. The sensing element was fabricated by the ...
Antioxidant efficacy of phytochemical extracts from defatted rice bran in the bulk oil system

Renuka Devi, R; Jayalekshmy, A; Arumughan, C (Elsevier, 2007)

The antioxidant compounds oryzanols, tocols and ferulic acid were identified in the methanolic extracts of defatted rice bran (DRB) by high pressure liquid chromatography (HPLC). The crude methanolic extract (CME) was ...
Physico-chemical characterization of starch ferulates of different degrees of substitution

Sindhu Mathew; Emilia Abraham, T (Elsevier, 2007)

Starch ferulates were prepared by reacting potato starch with ferulic acid chloride, using pyridine as a catalyst in dimethyl sulfoxide. Starch ferulates of different degrees of substitution (DS) were prepared and their ...
Synthesis of poly(N-isopropylacrylamide) copolymer containing anhydride and imide comonomers - A theoretical study on reversal of LCST

Francis, R; Jijil, C P; Prabhu, C A; Suresh, C H (Elsevier, 2007)

The stimuli sensitive copolymer NIPAM-co-MI was prepared by copolymerizing NIPAM (N-isopropylacrylamide) with varying concentrations of maleimide (MI). The copolymer showed the same ratio of the monomeric components as ...
Studies on the formation of self-assembled nano/micro structured polyaniline-clay nanocomposite (PANICN) using 3-pentadecyl phenyl phosphoric acid (PDPPA) as a novel intercalating agent cum dopant

Sudha, J D; Sasikala, T S (Elsevier, 2007)

Novel self-assembled micro/nanostructured polyaniline-clay nanocomposite (PANICN) materials were prepared by in situ intercalative emulsion polymerization of aniline in aqueous dispersion of clay using functionalized ...
Production of cellulase-free endoxylanase from novel alkalophilic thermotolerent Bacillus pumilus by solid-state fermentation and its application in wastepaper recycling

Asha Poorna, C; Prema, P (Elsevier, 2007)

The present study aimed at optimization of culture condition for the enhanced production of extra cellular thermostable cellulase-free xylanase from Bacillus pumilus by solid-state fermentation. Batch studies were carried ...
Ruthenium(II) trisbipyridine functionalized gold nanorods. Morphological changes and excited-state interactions

Jebb, M; Sudeep, P K; Pramod, P; George Thomas, K; Kamat, P V (American Chemical Society, 2007)

Gold nanorods synthesized using cetyltrimethylammonium bromide and tetraoctylammonium bromide as stabilizers are functionalized with a thiol derivative of ruthenium(II) trisbipyridyl complex [(Ru(bpy)(3)(2+)-C-5-SH] in ...
Pinocembrin triggers bax-dependent mitochondrial apoptosis in colon cancer cells

Suresh Kumar, M A; Mangalam S Nair; Hema, P S; John Mohan; Santhoshkumar, T R (Wiley, 2007)

Bioflavanoids are the major pigments in plants with multitude of biological activities including inhibition of proliferation or induction of apoptosis in tumor cells. Eventhough the safety records of most flavanoids are ...

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