Cochin, India
Cochin, India

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Saritha Chandran A.,Cochin University of Science and Technology | Saritha Chandran A.,St Teresas College | Narayanankutty S.K.,Cochin University of Science and Technology
Polymer - Plastics Technology and Engineering | Year: 2011

Natural rubber-Polyaniline (PANI)-Polyaniline coated short nylon-6 fiber (PANI-N6) composites were prepared by mechanical mixing and its cure characteristics, filler dispersion, mechanical properties, conductivity and thermal stability were evaluated. PANI was synthesized by chemical oxidative polymerization of aniline in presence of hydrochloric acid. PANI-N6 was prepared by in situ polymerization of aniline in the presence of short nylon-6 fiber. The composite showed higher tensile strength, tear strength and modulus values and lower elongation at break. The DC electrical conductivity and the thermal stability of the composites increased with PANI and PANI-N6 concentration. The highest conductivity obtained was 1.99×10 -6 S/cm. © Taylor & Francis Group, LLC.


Saritha Chandran A.,Cochin University of Science and Technology | Saritha Chandran A.,St Teresas College | Narayanankutty S.K.,Cochin University of Science and Technology | Mohanan P.,Cochin University of Science and Technology
Polymer - Plastics Technology and Engineering | Year: 2011

This report presents the microwave characteristics of conducting polymer composites (CPCs) based on chloroprene rubber with special reference to dielectric properties. CPCs based on polyaniline (PANI), polyaniline-coated short nylon fiber (PANI-N) and chloroprene rubber (CR) were prepared by mechanical mixing. The important properties like dielectric permittivity, loss tangent, conductivity, and dielectric heating coefficient were evaluated and compared. It was found that PANI/CR composites had very good dielectric properties in the microwave range. The addition of PANI-N improved the mechanical properties of the composites with reasonably good dielectric properties. The CPCs were also found to have good microwave absorption. © Taylor & Francis Group, LLC.


Gopinath A.,St Teresas College | Muraleedharan N.S.,Cochin University of Science and Technology | Chandramohanakumar N.,Cochin University of Science and Technology | Jayalakshmi K.V.,National Institute of Oceanography of India
Environmental Forensics | Year: 2011

Samples of macro algae collected at random distances from the coral and near shore environment of Lakshadweep archipelago were analyzed for their trace metal content (Fe, Mn, Zn, Cu, Co, Cr, Cd, Pb, and Ni). All the species showed an affinity towards essential elements, and the concentration of Fe seemed to be the highest in all the species, irrespective of their classification. The trace metal content reported in this study was much lower than the limit prescribed by Food and Agricultural Organization (FAO) in seafood for human consumption. None of the species of algae had the tendency to bioconcentrate Pb in their system as the detection level was below 0.1 mg/kg. The metal selectivity index calculated in statistical analysis emphasized the ability of algae to accumulate a particular metal from among the metals studied. To show the similarity between species and metal uptake, a group linkage clustering technique was used and the results were depicted using dendrogram. The marked similarities in the levels of trace metals in algal species have supported the view that all samples originated from a common coastal habitat. This exemplifies the applicability of bio-monitoring studies of marine algae to forensic investigations. © Taylor & Francis Group, LLC.


Nair S.M.,Cochin University of Science and Technology | Balchand A.N.,Cochin University of Science and Technology | Peter K.J.P.,Cochin University of Science and Technology | Gopinath A.,St Teresas College
Chemical Speciation and Bioavailability | Year: 2013

A unique phenomenon along the south west cost of India triggers an active fisheries season with the advent of "mudbanks". These regions, better described as "zones of biorhythm", involve different forms of nitrogen which act as nutrients during the propagation of mudbanks. High concentrations of urea and ammonia were observed prior to the formation of mudbanks, signifying the availability of different forms of nitrogen for later assimilation from a reservoir pool. In common with many features of upwelling areas, the variability of nitrite concentration under different phases of the biorhythm is brought about by the processes involved in the nitrification-denitrification process. The marked increase in the concentration of organic nitrogen as compared to a non-mudbank area is indicative of the presence of organically webbed forms of nitrogen. This organic form acted as a "reserved nutrient" (or inducer) for near-future utilisation subsequent to the assimilation of inorganic nitrogen forms. The study emphasises the role of sediments in nitrate uptake and its regeneration which is related to forms of nitrate in the overlying water media.


Irimpan M.T.,St. Joseph's College | Jolly C.I.,Kerala Ayurveda Ltd | Sheela D.,St Teresas College
Nature Environment and Pollution Technology | Year: 2011

The medicinal plant Gymnema sylvestre R. Br. is known for its antidiabetic potential. Preliminary phytochemical screening of stem and leaf samples of the herb showed positive testforflavonoids, hydrolysable tannins, phenols, saponins, sterols and terpanoids. The ash value is below the prescribed limit according to Ayurvedic Pharmacopeia. Antimicrobial activity was checked using agar well diffusion method. Water, methanoland ethanol extracts showed activity against Staphylococcus aureus. Bacillus subtilis is sensitive to hydroalcoholic and ethanolic extracts. The gram negative bacteria were resistant to the extracts. The antioxidant potential was assessed by DPPH assay method. The results provide evidence that Gymnema sylvestre leaf extract might indeed be potential source of free radical scavenger.


Dhanya V.S.,Mahatma Gandhi College | Sudarsanakumar M.R.,Mahatma Gandhi College | Suma S.,Sn College | Ng S.W.,University of Malaya | And 3 more authors.
Inorganic Chemistry Communications | Year: 2013

A new cerium-adipate metal-organic framework [Ce(C6H 8O4)(H2O)2(NO3)] was grown by simple gel diffusion technique at room temperature. The compound possesses a two dimensional network structure constructed from edge sharing CeO6(H2O)2(NO3) polyhedron. The adjacent polyhedrons are connected by the carboxylate ligand forming the 2D framework with bullet shaped channels running parallel to c axis. Thermal decomposition of the compound takes place in four steps and CeO2 is obtained as the final product. UV-visible spectra, solid state photoluminescence, and magnetic susceptibility measurements were also carried out at room temperature. © 2013 Elsevier B.V.


Leon L.,St Teresas College
Indian Journal of Public Health Research and Development | Year: 2015

Adolescents constitute 25% of Indian population. Investing the adolescent's education, health, and rights will yield great benefits for generations to come. Experts believe that most of the eating habits, including preference for and reliance on fast food are formed in childhood and track into adolescence and adulthood. Adolescent healthcare should be seriously overlooked which demands more knowledge, skill, and support to understand good nutrition. Information and communication technologies have revolutionalised our society especially adolescents. There is a growing recognition that "adolescent friendly" nutrition intervention strategies are needed and they are adequately provided to ensure a preventative and curative health care of adolescent age. Objectives: In order to achieve this goal, the present research tries to impart an educational intervention on the importance of healthy food habits, good nutrition and health hazards of consuming fast food, using a computer based intervention package. Study design: First phase of the present research was the preparation and production of the computer based intervention(CBI) package. Schools were identified and the permission to conduct the intervention and assessment of the pre and post- awareness of adolescents of the participating schools were also obtained. Pre and post nutrition knowledge measurement questionnaire was prepared and assessment was conducted at the selected schools. Results: Comparison of nutrition awareness before and after the intervention programs revealed that the nutritional awareness of the adolescents improved dramatically after the CBI sessions. More than 97 percent of the participants remarked that the CBI package was informative, interesting, and relevant. Conclusion: The study suggested the need of active participation and involvement of governmental agencies, NGOs, schools, healthcare professionals, teachers, and parents to organize the nutrition dissemination on a regular basis from multiple sources and in various formats. Thus adolescents should be made aware and responsible their health and equip them to live their life healthy and happy. © 2015, Indian Journal of Public Health Research & Development. All rights reserved.


Mendez R.M.,St Teresas College | Joseph G.,St Teresas College
Nature Environment and Pollution Technology | Year: 2014

The present study was undertaken to determine the effect of a seafood processing factory effluent on seed germination, early seedling growth and chlorophyll content of Vigna sinensis L. and Oryza sativa L. The effluent was collected from a seafood processing factory at Aroor in Alleppey district, Kerala. The physicochemical parameters pH, DO, BOD, COD, TDS, hardness and chlorides were analysed. The seeds of Vigna sinensis and Oryza sativa were grown in the varying dilutions of the effluent. The analysis of rate of germination, early growth of seedlings and chlorophyll content showed a decrease with higher concentration of the effluent. It could be suggested that the effluents could be safely released into the water bodies or for irrigational purpose only after sufficient dilution.


Joseph E.,St Teresas College | Avita Sr.,St Teresas College
Phytomorphology: An International Journal of Plant Morphology | Year: 2013

Phytolaccaceae comprises a weedy family of largely tropical and subtropical plants which have been placed, almost without exception in the order Centrospermae. Phenotypic variation and genetic diversity of the accessions of three South Indian representatives of the family Phytolaccaceae viz. Phytolacca octandra L., Petiveria alliacea L. and Rivina humilis L. were analysed. In order to study the relationship between the phenotypic characters, correlation coefficient was computed. The variations in phenotypic characters of accessions of the three genera and the inter-plants variations were studied by applying the statistical method of analysis of variance (ANOVA). The genetic fidelity of accessions where investigated by randomly amplified polymorphic DNA (RAPD) method with 20 primers, out of which 15 where properly amplified to a total of 270 scorable bands. Among them 3 were polymorphic, being 0.84 per cent of the total bands. A dendrogram based on similarity coefficient was generated by using the unweighted pair group method arithmetic means (UPGM A). The results of analyses of phenotypic characters of accessions did not support the presence of morphological ecotypes in the different localities of the samples. But the UPGM A cluster analysis of genetic diversity indicated the presence of ecogeographical variations.


Ramya R.,St Teresas College | Jose S.,St Teresas College
International Journal of Pharma and Bio Sciences | Year: 2014

In Kerala, herbal food formulations are widely used in maternal care, both pre- and postchildbirth. The present study was an attempt to understand the usage and nutritive value of these food formulations thereby documenting valuable traditional knowledge. Fifty young mothers and their elderly caretakers from Kollam district of Kerala were studied and it was observed that three extensively used food formulations of herbs Morinda reticulata, Cocos nucifera inflorescence and Asparagus racemosus were rich in energy, protein, fat, calcium, and vitamin C. Dietary pattern of young mothers revealed that the dietary intake of nutrients were inadequate when compared to Recommended Dietary Allowance suggested by Indian Council of Medical Research (2010). Consumption of the indigenous, nutrient-rich food formulations bridged the gap between the deficit in intake and the recommendations. Thus these traditional foods have nutritional value in addition to the functional benefits envisaged in Ayurveda.

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