2009: Recent submissions

Now showing items 81-100 of 184

Reversible self-assembly of entrapped fluorescent gelators in polymerized styrene gel matrix: Erasable thermal imaging via recreation of supramolecular architectures

Srinivasan, S; Babu, P A; Mahesh, S; Ajayaghosh, A (American Chemical Society, 2009)

The reversible shift of emission in fluorescent molecular gelators has been explored for the preparation of a composite polymer film useful for erasable thermal imaging and secret documentation. A gelation-assisted ...
Aromatic expanded isophlorins: Stable 30 pi annulene analogues with diverse structural features

Reddy, J S; Anand, V G (American Chemical Society, 2009)

Synthesis and structural diversity of novel aromatic expanded isophlorins are described. Expanded isophlorins are higher analogues of 20 pi isophlorin; 30 pi isophlorins are the simplest examples of expanded isophlorins. ...
Optimization of laccase production from a novel strain-Streptomyces psammoticus using response surface methodology

Niladevi, K N; Rajeev K Sukumaran; Nicemol Jacob; Anisha, G S; Prema, P (Elsevier, 2009)

Response surface methodology was employed for the optimization of different nutritional and physical parameters for the production of laccase by the filamentous bacteria Streptomyces psammoticus MTCC 7334 in submerged ...
Advances in research of polysaccharides in cordyceps species

Zhong, S; Pan, H J; Fan, L F; Lv, G Y; Wu, Y Z; Binod, P; Pandey, A; Soccol, C R (Faculty of Food Technology and Biotechnology, 2009)

Cordyceps sinensis (Berk.) Sacc. is one of the well-described fungi that has been used in traditional Chinese medicine for over 700 years. Fungal mycelia contain some polysaccharides that are responsible for their biological ...
Probing the initial stages of molecular organization of Oligo(p-phenylenevinylene) assemblies with monolayer protected gold nanoparticles

Rajeev Kumar, V R; Sajini, V; Sreeprasad, T S; Praveen, V K; Ajayaghosh, A; Pradeep, T (Wiley, 2009)

Thiol-protected gold nanoparticles (GNPs) have been used to probe the initial stages of the molecular organization of oligo(p-phenylenevinylene) (OPV) gelators. The hybrid materials prepared by the self-assembly of OPVs ...
Typical aromatic noncovalent interactions in proteins: A theoretical study using phenylalanine

Suresh, C H; Neetha Mohan; Vijayalakshmi, K P; George, R; Janice M Mathew (Wiley, 2009)

A systematic study of CH center dot center dot center dot pi, OH center dot center dot center dot pi, NH center dot center dot center dot pi and cation center dot center dot pi interactions has been done using complexes ...
Hybrid thermoreversible gels from covalent polymers and organogels

Dasgupta, D; Srinivasan, S; Rochas, C; Ajayaghosh, A; Guenet, J M (American Chemical Society, 2009)

This paper reports oil experiments intended for investigating the feasibility of preparing hybrid thermo-reversible gels from covalent polymers and noncovalent self-assembling pi-conjugated molecules. The formation and the ...
Microwave dielectric properties of SrRE4Si3O13 (RE5La, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Er, Tm, Yb, and Y) ceramics

Sherin Thomas; Sebastian, M T (Wiley, 2009)

The apatite type SrRE4Si3O13 (RE=La, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Er, Tm, Yb, and Y) ceramics have been prepared by the conventional solid-state ceramic route. The phase purity and surface morphology of the sintered ceramics ...
New Scheelite-based environmentally friendly yellow pigments: (BiV)(x)(CaW)(1-x)O-4

Sameera, S F; Prabhakar Rao, P; Kumari, L S; Peter Koshy (Chemical Soc Japan, 2009)

New scheelite-based environmentally friendly yellow pigments with the general formula, (BiV)(x)(CaW)(1-x)O-4 (x = 0.2, 0.4, 0.6, and 0.8) have been synthesized by a solid-state route. The resulting colorants were characterized ...
Volatile constituents from the leaves and flowers of Murraya koenigii (Linn.) spreng

Padmakumari, K P (Taylor & Francis, 2009)

The volatiles of fresh leaf and flower of Murraya koenigii, grown in Thiruvananthapuram, Kerala were isolated by simultaneous distillation and extraction method and analysed by high resolution GC and GC-MS. Fifty two ...
Mechanical properties of organomodified kaolin/natural rubber vulcanizates

Yahaya, L E; Adebowale, K O; Menon, A R R (Elsevier, 2009)

Kaolin modified with sodium salt of rubber seed oil (RSO-Na) was compounded with natural rubber (NR) by melt intercalation. The effect of modified kaolin loading on the physicomechanical properties of the vulcanizates was ...
Conducting polystyrene/polyaniline blend through template-assisted emulsion polymerization

Sudha, J D; Sivakala, S (Springer, 2009)

Electrically conducting polystyrene (PS)/polyaniline blends have been prepared through a one-step "anilinium-surfactant template"-assisted emulsion polymerization at room temperature. The self-assembled cylindrical ...
Modified 26 and 28 pi hexaphyrins with five meso-links: Optical, redox, and structural properties

Gokulnath, S; Prabhuraja, V; Suresh, C H; Chandrashekar, T K (Wiley, 2009)

The syntheses of new aromatic 26 pi and non-aromatic 28 pi hexa-phyrins through a [4+2] acid catalyzed condensation of easily available and air-stable precursors are reported. Both 26 pi and 28 pi hexaphyrins are reversibly ...
Compactin production studies using penicillium brevicompactum under solid-state fermentation conditions

Shaligram, N S; Singh, S K; Singhal, R S; Pandey, A; Szakacs, G (Humana Press, 2009)

In the present study, compactin production by Penicillium brevicompactum WA 2315 was optimized using solid-state fermentation. The initial one factor at a time approach resulted in improved compactin production of 905 mu ...
Tuning microstructures in organogels: Gelation and spectroscopic properties of mono- and bis-cholesterol-linked diphenylbutadiene derivatives

Shibu Abraham; Ratheesh, K V; Suresh Das (American Chemical Society, 2009)

The gelation and photophysical properties of mono- and bis-cholesterol derivatives linked to diphenylbutadiene have been investigated. Scanning electron microscopy of xerogels of the monocholesterol derivatives indicated ...
Formation of highly luminescent supramolecular architectures possessing columnar order from octupolar oxadiazole derivatives: Hierarchical self-assembly from nanospheres to fibrous gels

Shinto Varghese; Saleesh Kumar, N S; Anjali Krishna; Shankar Rao, D S; Prasad, S K; Suresh Das (Wiley, 2009)

The synthesis and study of the liquid crystalline, photophysical, and aggregation behavior of novel octupolar oxadiazole derivatives are reported. These molecules formed columnar mesophases at elevated temperatures Which ...
Phenothiazine attached Ru(bpy)(3) (2)+ derivative as highly selective "turn-ON" luminescence chemodosimeter for Cu2+

Ajayakumar, G; Sreenath, K; Gopidas, K R (Royal Society of Chemistry, 2009)

The design of a highly selective "turn-ON" luminescence chemodosimeter for Cu2+ is reported. The design strategy made use of the ability of Cu2+ ions to oxidize aromatic amines in acetonitrile solution. The aromatic amine ...
4,4,5,5,5-Pentafluoro-1-(9H-fluoren-2-yl)-1,3-pentanedione complex of Eu3+ with 4,5-bis(diphenylphosphino)-9,9-dimethylxanthene oxide as a promising light-conversion molecular device

Ambili Raj, D B; Biju, S; Reddy, M L P (Royal Society of Chemistry, 2009)

A novel beta-diketone ligand, 4,4,5,5,5-pentafluoro-1-(9H-fluoren-2-yl)-1,3-pentanedione (Hpffpd), which contains a polyfluorinated alkyl group, as well as a long conjugated fluorene unit, and a chelate phosphine oxide ...
Effect of conductivity of filler on the percolation threshold of composites

Deepa, K S; Nisha, S K; Parameswaran, P; Sebastian, M T; Jose James (American Institute of Physics, 2009)

Polytetrafluoroethylene (PTFE)-silver composites were prepared and the influence of conductivity, particle size, and interfacial area of Ag particle on the percolative behavior were investigated. Silver particles of two ...
Ferroelectric and incipient ferroelectric properties of a novel Sr9-xPbxCe2Ti2O36(x=0-9) ceramic system

Kamba, S; Savinov, M; Laufek, F; Tkac, O; Kadlec, C; Veljko, S; Elizabeth, J J; Subodh, G; Sebastian, M T; Klementova, M; Bovtun, V; Pokorny, J; Goian, V; Petzelt, J (American Chemical Society, 2009)

Sr9-xPbxCe2Ti12O36 system is derived from the perovskite SrTiO3 and its chemical formula can be written as (Sr1-yPby)(0.75)Ce0.167TiO3. We investigated dielectric response of Sr9-xPbxCe2Ti12O36 ceramics (x = 0-9) between ...

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