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Patil R.P.,Shivaji University | Pai S.R.,Shivaji University | Pawar N.V.,Shivaji University | Shimpale V.B.,The New College | And 2 more authors.
Critical Reviews in Food Science and Nutrition | Year: 2012

Diversity needs to be "conserved through use." Owing to the global need, the present study includes two underutilized berries, Carissa carandus and Eleagnus conferta, to explore their potential as supplementary food by evaluating their antioxidant activity and approximate chemical composition. Berries of E. conferta are a richer source of carotene, ascorbic acid, protein, and magnesium, whereas berries of C. carandus are rich in sugars, lipids, iron, and magnesium. The antioxidant properties of the berries and a comparative account on their performance using DPPH and FRAP assay was studied. Both assays revealed high activity in the peel extract of berries of C. carandus. The LC-MS/MS profile of C. carandus reveals the presence of eleven different polyphenolic compounds while E. conferta had only four of these compounds. © 2012 Copyright Taylor and Francis Group, LLC. Source

Kumar R.,The New College | Ulagendran V.,University of Alberta | Kannappan V.,Presidency College at Chennai | Jayakumar S.,Rkm Vivekananda College
Fluid Phase Equilibria | Year: 2011

Ultrasonic velocity (u), density (ρ) and coefficient of viscosity (η) were measured for ternary mixtures containing aniline (ANI) as common component and acetophenone (ACP), 4-chloroactophenone (ClACP) and 4-methylacetophenone (MACP) as other components in n-hexane medium in the concentration range 0.025-0.2. M. The measurements were made at four different temperatures, namely, 293, 298, 303 and 308. K and at atmospheric pressure. The experimental results have been used to calculate various acoustical parameters and excess parameters. The trend in these parameters with concentration establishes that (i) strong intermolecular interactions exist in these mixtures and (ii) formation of charge transfer complexes through hydrogen bonding between primary amine and aromatic ketones. The formation of complexes has also been confirmed by optical spectroscopy at 303. K. The formation constants of the charge transfer complexes determined using Benesi-Hildebrand equation (spectroscopic method) are comparable with those obtained using Kannappan equation (ultrasonic method). It is observed that the stability of the complexes is influenced by the structure of the component molecules. In order to assess the thermodynamic stability of the complexes, free energy of formation (Δ G), enthalpy of formation (Δ H) and entropy changes (Δ S) are computed. © 2011. Source

Kumar R.,The New College | Jayakumar S.,Rkm Vivekananda College | Kannappan V.,Presidency College at Chennai
Fluid Phase Equilibria | Year: 2013

Ultrasonic investigation has been carried out on five binary and four ternary liquid mixtures to identify the dominance of solute-solute interactions. p-Chloranil is used as acceptor and four aromatic amines are used as donors. Primary, secondary and tertiary amines were used mainly to determine the difference in the site of complex formation. The study was made in DMSO at 303. K and at atmospheric pressure. The trend in acoustical and excess thermo acoustical parameters of mixtures containing p-chloranil and amines is used to identify the existence of intermolecular interaction, probably through hydrogen bonded or charge transfer complex formation. The formation of 1:1 complexes between p-chloranil and aromatic amines was established by UV-visible spectroscopic methods at 303. K. The formation constants of the charge transfer complexes were computed by spectroscopic and ultrasonic methods which show similar trends and well establish the influence of structural aspect of the amine (donor) on the stability of charge transfer complexes. © 2013 Elsevier B.V. Source

Rupani P.F.,Universiti Sains Malaysia | Ibrahim M.H.,Universiti Sains Malaysia | Ismail S.A.,The New College
International Journal of Recycling of Organic Waste in Agriculture | Year: 2013

Background: Palm oil mill effluent and palm press fiber are problematic wastes generated by the palm oil mill industries in Malaysia. This study has endeavored to assess the possibility of the vermicomposting of residue from the palm oil mills using epigeic earthworms Lumbricus rubellus under laboratory conditions. The study was conducted over 50 days using four combinations in three replicates of each treatment as palm oil mill effluent: palm press fiber in 50:50 ratio (T1), palm oil mill effluent/palm press fiber/cow dung in 50:25:25 ratio (T2), palm oil mill effluent/palm press fiber/cow dung/lawn clipping in 50:20:15:15 ratio (T3), and only palm press fiber (T4). Twenty healthy adult L. rubellus with average weight of 3.92 g was introduced. Results: Results showed that T3 has a significant decrease in C/N ratio (14.81 ± 0.07) compared to the other treatments. The presence of cow dung and lawn clipping in the mixtures makes it more suitable for vermicomposting process as early compost productions were recorded in T2 and T3. Conclusion: The study showed that the major polluting problem in palm oil mills can be tackled through vermicomposting technique. Based on the results, vermicompost is found suitable for agriculture purposes as an organic fertilizer as well as soil conditioner. © 2013, Rupani et al.; licensee Springer. Source

Mohideen Askar Nawas P.,Periyar EVR College Autonomous | Jawahar Ali A.,The New College
International Journal of Pharma and Bio Sciences | Year: 2014

An investigation was made on the diversity of aerobic heterotrophic denitrifying bacterial population in the sediment samples of six sampling stations (S-I to S-VI) at Rajakkamangalam estuary of southwest coast of India for the period of two years from January 2005 to December 2006. The result indicated that the distribution of denitrifying bacterial populations in the estuarine environment fluctuated much between sampling stations. Among the total denitrifying bacterial populations Pseudomonas was found to dominant group. The percentage of total denitrifying bacterial populations was low in the pollutant mixed stations. Source

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