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Ernakulam, India

Suma K.K.,Cochin University of Science and Technology | Suma K.K.,Maharajas College | Jacob S.,Cochin University of Science and Technology | Joseph R.,Cochin University of Science and Technology
Materials Science and Engineering B: Solid-State Materials for Advanced Technology | Year: 2010

Vinyl acetate-butyl acrylate (VAc-BuA) copolymer latex was prepared by emulsion polymerization. The polymerization conditions and the composition were optimized. The 85/15 wt.% (vinyl acetate/butyl acrylate) gave good tensile strength of the order of 15.6 MPa and a glass transition temperature (Tg) value of -6.49 °C. This copolymer was used as a binder in the paint formulation. In this formulation nanosized TiO2 sol was used as a pigment instead of conventional rutile TiO2. Nanosized TiO2 is prepared by wet process. These nanosized TiO2 rutile colloidal sol has improved properties such as photostability, UV shielding, dispersion stability, etc. The surface properties of paint were found to be superior compared to commercially used paint. © 2009 Elsevier B.V. All rights reserved.


Vijayakumari K.N.,Maharajas College | Murali D.,Sree Narayana College
Indian Journal of Fisheries | Year: 2012

Peripheral haematological parameters such as total erythrocyte, leucocyte and thrombocyte counts (TEC, TLC, TTC), haemoglobin content (Hb), haematocrit (Ht), erythrocyte sedimentation rate (ESR), RBC/WBC ratio, mean corpuscular volume (MCV), mean corpuscular haemoglobin (MCH) and mean corpuscular haemoglobin concentration (MCHC) of Puntius filamentosus in relation to sex, maturity stages, standard length of the fish and seasons were analysed. The results of the present study shows that peripheral haematological make-up is not much affected by the sex of the fish. However, most of the haematological parameters (TEC, TLC, TTC, Hb and Ht) registered higher mean values in males than in females. Gonad maturity has only little influence on the peripheral haematological make-up. But there was a general tendency for decrease in the mean values of TEC, TTC, Hb and Ht in fish at maturity stage IV. Simple linear correlation analysis (r) revealed that TTC (p<0.01), Hb and MCH (p<0.05) had significant negative association and Ht (p<0.05) showed significant positive association with standard length (SL). Majority of haematological variables (TEC, TLC, TTC, Hb , Ht, MCH and MCHC) recorded higher mean values during pre-monsoon (February- May) than during monsoon (June- September) and postmonsoon (October- January) seasons.


Suresh V.,Government Victoria College | Krishnakumar K.A.,Maharajas College | Asha V.V.,Rajiv Gandhi Center for Biotechnology
Biomedicine and Pharmacotherapy | Year: 2015

The existing screening systems for anti-hepatitis B virus (anti-HBV) drug discovery is time-consuming mainly due to the laborious detection system it is using. A new fluorescence based screening system for high throughput anti-HBV drug discovery was created by tagging hepatitis B surface antigen (HBsAg) with monomeric red fluorescent protein and hepatitis B virus (HBV) core protein with enhanced green fluorescent protein. The two constructs were co-transfected on to Hep3B cells and the transfection was stabilized by fluorescent activated cell sorter (FACS). The fusion proteins expressed through the secretory protein pathway as evidenced by localization with ER-Tracker and tubulin tracker. The new system has given analogues results like that of conventional enzyme-linked immunosorbent assay (ELISA). Hence it can be of very high potential for large scale drug screening systems. © 2015 Elsevier Masson SAS.


Ajitha P.S.,Maharajas College | Muraleedharan Nair M.K.,Maharajas College
Research Journal of Pharmaceutical, Biological and Chemical Sciences | Year: 2010

Schiff base complexes of rare earth metals have been an interesting research field for the past few years due to their pharmacological, clinical, analytical and biological applications. Also the chemistry of antipyrine and its derivatives has been extensively investigated due to its physiological properties. The study of the metal complexes of antipyrine in antineoplastic medication, molecular biology and bioengineering has become hotspots in recent years. We report a new Schiff base formed from pyridoxal, a vitamin and 4-aminoantipyrine. Here we explore the antibacterial activity of the newly synthesized Schiff base formed from 4-aminoantipyrine with vitamin B. This Schiff base acts as a tridentate ligand, which form very stable complexes with the lanthanide metals La, Ce, Pr, Nd, Sm, Gd, Tb, Dy and Er. The structure of the ligand and complexes were characterized by elemental analysis, IR and UV spectral studies, magnetic susceptibility measurements, electrical conductance and thermo gravimetric analysis. The ligand is found to be chelating with the metal ion in a neutral tridentate manner through the carbonyl oxygen, azomethine nitrogen and the phenolic oxygen. The nitrate ions are monodentately coordinated to the metal ion. All complexes are found to have the formula, [ML2 (NO3)3]. All the studies reveal a coordination number of nine for the metals in all the complexes.


Varghese S.,Maharajas College | Muraleedharan Nair M.K.,Maharajas College
Research Journal of Pharmaceutical, Biological and Chemical Sciences | Year: 2010

The Schiff base 2-hydroxybenzilidene-3-aminophenol was synthesized and used for the preparation of coordination complexes with some transition and inner transition metals. All the compounds were characterized by elemental analysis, IR and UV spectral studies, and molar conductivity studies. The antimicrobial activities were checked against four different bacterial species E.coli, B.subtills, S.auereus and P.aeruginosa and also screened for activity against the fungus Rhizopus, the common bread mould.

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