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Preeth Sivakumar - One of the best experts on this subject based on the ideXlab platform.
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Use of Activated Carbon of Thevetia peruviana wood for the Adsorption of Acid Violet Dye from Aqueous Solutions
Asian Journal of Research in Chemistry, 2012Co-Authors: J.raffiea Baseri, P. N. Palanisamy, Preeth SivakumarAbstract:Activated carbon prepared from Thevetia peruviana wood was used as an adsorbent for the removal of Acid Violet 49 from aqueous solutions. Batch adsorption experiments were performed for adsorption kinetics and isotherm by varying temperature, initial dye concentration, pH and time. The amount of dye adsorbed increased while increasing the initial concentration and temperature of the solution. The experimental data fitted well to Pseudo second order kinetic model with Intra particle diffusion as the rate determining step. Adsorption data fitted with Langmuir model. The negative value of Gibb's free energy (ΔG°) indicated that the adsorption was spontaneous in nature. The results showed that the activated carbon of Thevetia peruviana was suitable for the removal of the acidic dyes from the aqueous solutions. The positive value of enthalpy () indicated that the adsorption of the selected dyes were endothermic.
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Adsorption of Reactive Dye By a Novel Activated Carbon Prepared From Thevetia peruviana
International Journal of Chemistry Research, 2012Co-Authors: J.raffiea Baseri, P. N. Palanisamy, Preeth SivakumarAbstract:This investigation was to evaluate the adsorption capability of activated carbon prepared from Thevetia peruviana wood for removal of reactive textile dye (RO4) from aqueous solution. Batch adsorption experiments were performed as a function of initial dye concentration, contact time, temperature and pH. The amount of dye adsorbed increased while increasing the initial concentration and temperature of the solution. The experimental data fitted well to Pseudo second order kinetic model with Intra particle diffusion as the rate determining step. Adsorption data fitted with Langmuir model. The negative value of Gibb’s free energy (∆G°) indicated that the adsorption was spontaneous in nature. The results showed that the activated carbon of Thevetia peruviana was suitable for the removal of the reactive dyes from the aqueous solutions. The positive value of enthalpy (∆ °H ) indicated that the adsorption of the selected dyes were endothermic.
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ADSORPTION OF REACTIVE DYE BY A NOVEL ACTIVATED CARBON PREPARED FROM Thevetia peruviana Research Article
2012Co-Authors: J.raffiea Baseri, P. N. Palanisamy, Preeth SivakumarAbstract:This investigation was to evaluate the adsorption capability of activated carbon prepared from Thevetia peruviana wood for removal of reactive textile dye (RO4) from aqueous solution. Batch adsorption experiments were performed as a function of initial dye concentration, contact time, temperature and pH. The amount of dye adsorbed increased while increasing the initial concentration and temperature of the solution. The experimental data fitted well to Pseudo second order kinetic model with Intra particle diffusion as the rate determining step. Adsorption data fitted with Langmuir model. The negative value of Gibb’s free energy (∆G°) indicated that the adsorption was spontaneous in nature. The results showed that the activated carbon of Thevetia peruviana was suitable for the removal of the reactive dyes from the aqueous solutions. The positive value of enthalpy ( ° ∆H ) indicated that the adsorption of the selected dyes were endothermic.
Sanjay Basumatary - One of the best experts on this subject based on the ideXlab platform.
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Yellow Oleander ( Thevetia peruviana ) Seed as a Potential Bioresource for Industrial Applications
Mini-Reviews in Organic Chemistry, 2020Co-Authors: Bidangshri Basumatary, Biswajit Nath, Pranjal Kalita, Bipul Das, Sanjay BasumataryAbstract:Raw materials from renewable natural resources for industrial applications are in high concern in recent industrial research. Researchers invest their time in the management of waste as well as the conversion of waste to wealth. In that line, the production of biofuels including biodiesel, and value-added products from non-edible oil sources as well as from the generated waste biomasses, are in the tilt of research in recent times. Preparation of different oleochemicals such as grease, resins, soap, lubricants, etc. from vegetable oils, and utilization of seed cake as fertilizer, animal feed, medicine, etc. are encouraged as a part of the generation of waste to wealth as per today’s environment is concerned. In recent days, various reports on the production of biodiesel and other oleochemicals from non-edible oil sources are published in various scientific journals. Yellow oleander (Thevetia peruviana) is a tropical shrub which produces a toxic non-edible fruit containing a high percentage of seed oil (up to 67%), protein (30-37%) as well as other medicinally important phytochemicals. It is attracting the researchers worldwide for the production of biodiesel, various oleochemicals, medicine, animal feed, etc. In this study, biodiesel and various value-added products synthesized from Thevetia peruviana oil and cake are reviewed to generate and popularize the potential use of yellow oleander seed for various industrial applications and accordingly, for substantial growth in cultivation for commercial-scale requirements.
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Transesterification of yellow oleander (Thevetia peruviana) seed oil to fatty acid methyl esters (biodiesel) using a heterogeneous catalyst derived from rhizome of Musa balbisiana Colla.
International Journal of ChemTech Research, 2014Co-Authors: Sanjay Basumatary, Dibakar Chandra DekaAbstract:Transesterification of yellow oleander (Thevetia peruviana) seed oil to its fatty acid methyl esters (FAME, biodiesel) was carried out in methanol by batch reaction using a heterogeneous catalyst derived from the rhizome of Musa balbisiana Colla (one variety of banana plant). The yield of biodiesel obtained is 95 wt.% at room temperature (32 °C) in 3 h. The catalyst is thermally stable and better catalytic activity is observed when it is activated.
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High quality biodiesel from yellow oleander (Thevetia peruviana) seed oil.
Biomass and Bioenergy, 2011Co-Authors: Dibakar Chandra Deka, Sanjay BasumataryAbstract:Yellow oleander (Thevetia peruviana Schum.) seed oil has been investigated to produce biodiesel. Transesterification of the oil to biodiesel was carried out in methanol by batch reaction using a heterogeneous catalyst derived from the trunk of Musa balbisiana Colla (one variety of banana plant). 96 wt.% of the oil is converted to biodiesel at 32 °C in 3 h. The wt.% composition of the biodiesel is methyl oleate 43.72, methyl palmitate 23.28, methyl linoleate 19.85, methyl stearate 10.71 and methyl arachidate 2.41. Fuel properties conform to standards set for ASTM D6751, EN 14214, BS II and BS III, and in certain aspects better. The biodiesel is free from sulfur and has exhibited a high cetane number of 61.5.
Dibakar Chandra Deka - One of the best experts on this subject based on the ideXlab platform.
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Transesterification of yellow oleander (Thevetia peruviana) seed oil to fatty acid methyl esters (biodiesel) using a heterogeneous catalyst derived from rhizome of Musa balbisiana Colla.
International Journal of ChemTech Research, 2014Co-Authors: Sanjay Basumatary, Dibakar Chandra DekaAbstract:Transesterification of yellow oleander (Thevetia peruviana) seed oil to its fatty acid methyl esters (FAME, biodiesel) was carried out in methanol by batch reaction using a heterogeneous catalyst derived from the rhizome of Musa balbisiana Colla (one variety of banana plant). The yield of biodiesel obtained is 95 wt.% at room temperature (32 °C) in 3 h. The catalyst is thermally stable and better catalytic activity is observed when it is activated.
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Synthesis and characterization of yellow oleander (Thevetia peruviana) seed oil-based alkyd resin
Industrial Crops and Products, 2014Co-Authors: Montu Moni Bora, Dibakar Chandra Deka, Pronob Gogoi, Dilip Kumar KakatiAbstract:Abstract Yellow oleander ( Thevetia peruviana ) is an ever-green, ornamental, dicotyledonous shrub belonging to Apocynaceae family. The oil content of its seed was found to be ∼61.7% when extracted with petroleum ether (40–60 °C), which was used as a raw material for synthesis of alkyd resin. Alkyd resins were synthesized by two-stage alcoholysis–polyesterification reaction of this oil with phthalic and maleic anhydride. The synthesized alkyd resins were characterized by FT-IR and 1 H NMR spectroscopic techniques. Resins were cured by blending with epoxy resin. The surface characteristic of the cured resins was studied by SEM analysis. The physico-chemical properties of the resins such as acid value, free fatty acid content, iodine value etc. were evaluated. The coating performance of the cured resins was tested by measuring chemical resistance, thermal stability, pencil hardness, gloss and adhesion.
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High quality biodiesel from yellow oleander (Thevetia peruviana) seed oil.
Biomass and Bioenergy, 2011Co-Authors: Dibakar Chandra Deka, Sanjay BasumataryAbstract:Yellow oleander (Thevetia peruviana Schum.) seed oil has been investigated to produce biodiesel. Transesterification of the oil to biodiesel was carried out in methanol by batch reaction using a heterogeneous catalyst derived from the trunk of Musa balbisiana Colla (one variety of banana plant). 96 wt.% of the oil is converted to biodiesel at 32 °C in 3 h. The wt.% composition of the biodiesel is methyl oleate 43.72, methyl palmitate 23.28, methyl linoleate 19.85, methyl stearate 10.71 and methyl arachidate 2.41. Fuel properties conform to standards set for ASTM D6751, EN 14214, BS II and BS III, and in certain aspects better. The biodiesel is free from sulfur and has exhibited a high cetane number of 61.5.
Mario Lobo Arias - One of the best experts on this subject based on the ideXlab platform.
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Antimicrobial activity of callus and cell suspension cultures extracts of Thevetia peruviana
Revista de la Facultad de Ciencias, 2019Co-Authors: Juan Pablo Arias Echeverri, Mariana Peñuela, Isabel Cristina Ortega, Mario Lobo AriasAbstract:Thevetia peruviana is an ornamental plant considered source of biologically compounds with cardiac and antimicrobial activity. These compounds are normally extracted from different parts of the fully growth plants. In this work, extracts were obtained from callus and cell suspension cultures of T. peruviana and their antimicrobial activity was evaluated by disk diffusion tests against gram negative ( Salmonella thipimurium and Escherichia coli ) and gram positive ( Staphylococcus aureus and Bacillus cereus ) strains. Ethanol, methanol and hexane extracts from callus and cell suspension cultures showed biological activity. Methanolic cell suspension extract showed activity against B. cereus and S. aureus . Ethanolic cell suspension extract inhibit all the bacteria, especially S. thipimurium while hexanic extract showed resistance activity against S. thipimurium , S. aureus and B. cereus . In terms of the source of the extracts, hexane extracts obtained from cell suspension cultures showed a higher antimicrobial activity compared to callus, while ethanol extracts had an inverse behavior. These results outline in vitro cell culture of T. peruviana as a feasible biotechnological platform for the production of compounds with antimicrobial activity.
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Plant cell suspension culture of Thevetia peruviana (Pers.) K. Schum. in shake flask and stirred tank reactor scale: A comparative study
African Journal of Biotechnology, 2017Co-Authors: Juan Pablo Arias, Karol Zapata, Benjam In Rojano, Mariana Peñuela, Mario Lobo AriasAbstract:The aim of this work was to evaluate the effect of changing the shake flask for a stirred-tank bench bioreactor on the performance of Thevetia peruviana cultures. Maximum cell growth of 18.59 and 8.46 g DW/L for shake flask and bench bioreactor at day 14 was obtained, respectively. The end of the exponential growth phase in shake flask was correlated with total sugar consumption, while this behavior was not observed in bench bioreactor. Preferential uptake of glucose over fructose was observed in both systems. Cell morphology was similar for both systems during culture time, exhibiting individual cells with cylindrical and elongated shape at day 0 and some aggregates with rounded cells at day 14. Polyphenol production was not affected by the system configuration and scale. Intra and extracellular antioxidant activity were directly related with phenol production in both systems. Guaiacol peroxidase activity (GPX) went from 1.87 to 7.97 µM/min/mg protein in shake flask and it correlated with low reactive oxygen species (ROS) production. This is an indication of a positive enzymatic cell response for culture in shake flask mediated by GPX. In contrast, the conditions in the bench bioreactor generated a higher stress environment, increasing ROS production without activating enzymatic or non-enzymatic responses led by guaiacol and phenolic compounds, respectively. In conclusion, bench stirred-tank bioreactor scale affects biomass production and sugars uptake negatively. Key words: Thevetia peruviana, plant cell suspension culture, stirred-tank bioreactor, phenolic compounds, antioxidant activity.
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Structured model and parameter estimation in plant cell cultures of Thevetia peruviana.
Bioprocess and biosystems engineering, 2016Co-Authors: Adriana Villegas, Juan Pablo Arias, Daira Aragon, Silvia Ochoa, Mario Lobo AriasAbstract:In this work, a mechanistic model for predicting the dynamic behavior of extracellular and intracellular nutrients, biomass production, and the main metabolites involved in the central carbon metabolism in plant cell cultures of Thevetia peruviana is presented. The proposed model is the first mechanistic model implemented for plant cell cultures of this species, and includes 28 metabolites, 33 metabolic reactions, and 61 parameters. Given the over-parametrization of the model, its nonlinear nature and the strong correlation among the effects of the parameters, a parameter estimation routine based on identifiability analysis was implemented. This routine reduces the parameter’s search space by selecting the most sensitive and linearly independent parameters. Results have shown that only 19 parameters are identifiable. Finally, the model was used for analyzing the fluxes distribution in plant cell cultures of T. peruviana. This analysis shows high uptake of phosphates and parallel uptake of glucose and fructose. Furthermore, it has pointed out the main central carbon metabolism routes for promoting biomass production in this cell culture.
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Thevetin B: glicósido cardiotónico predominante en Thevetia peruviana Thevetin B: Cardiotonic glycoside predominant in Thevetia peruviana
2011Co-Authors: Fredy Amaringo Villa, Angelina Hormaza, Mario Lobo AriasAbstract:The cardiotonic glycoside Thevetin B was isolated, purified, characterized and quantified as the major component in the leaves of Thevetia peruviana , species that has widespread in the region of Valle del Aburra. Potential cardiotonic properties described for these compounds, makes it an interesting molecule for the treatment of con gestive heart failure. Its purification was achieved by column chromatography, its structural identification was p erformed by NMR spectroscopy and high resolution liquid chromatography coupled to mass (HPLC-MS) and its quantification by HPLC chromatograms using external standard method.
J.raffiea Baseri - One of the best experts on this subject based on the ideXlab platform.
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Use of Activated Carbon of Thevetia peruviana wood for the Adsorption of Acid Violet Dye from Aqueous Solutions
Asian Journal of Research in Chemistry, 2012Co-Authors: J.raffiea Baseri, P. N. Palanisamy, Preeth SivakumarAbstract:Activated carbon prepared from Thevetia peruviana wood was used as an adsorbent for the removal of Acid Violet 49 from aqueous solutions. Batch adsorption experiments were performed for adsorption kinetics and isotherm by varying temperature, initial dye concentration, pH and time. The amount of dye adsorbed increased while increasing the initial concentration and temperature of the solution. The experimental data fitted well to Pseudo second order kinetic model with Intra particle diffusion as the rate determining step. Adsorption data fitted with Langmuir model. The negative value of Gibb's free energy (ΔG°) indicated that the adsorption was spontaneous in nature. The results showed that the activated carbon of Thevetia peruviana was suitable for the removal of the acidic dyes from the aqueous solutions. The positive value of enthalpy () indicated that the adsorption of the selected dyes were endothermic.
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Adsorption of Reactive Dye By a Novel Activated Carbon Prepared From Thevetia peruviana
International Journal of Chemistry Research, 2012Co-Authors: J.raffiea Baseri, P. N. Palanisamy, Preeth SivakumarAbstract:This investigation was to evaluate the adsorption capability of activated carbon prepared from Thevetia peruviana wood for removal of reactive textile dye (RO4) from aqueous solution. Batch adsorption experiments were performed as a function of initial dye concentration, contact time, temperature and pH. The amount of dye adsorbed increased while increasing the initial concentration and temperature of the solution. The experimental data fitted well to Pseudo second order kinetic model with Intra particle diffusion as the rate determining step. Adsorption data fitted with Langmuir model. The negative value of Gibb’s free energy (∆G°) indicated that the adsorption was spontaneous in nature. The results showed that the activated carbon of Thevetia peruviana was suitable for the removal of the reactive dyes from the aqueous solutions. The positive value of enthalpy (∆ °H ) indicated that the adsorption of the selected dyes were endothermic.
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ADSORPTION OF REACTIVE DYE BY A NOVEL ACTIVATED CARBON PREPARED FROM Thevetia peruviana Research Article
2012Co-Authors: J.raffiea Baseri, P. N. Palanisamy, Preeth SivakumarAbstract:This investigation was to evaluate the adsorption capability of activated carbon prepared from Thevetia peruviana wood for removal of reactive textile dye (RO4) from aqueous solution. Batch adsorption experiments were performed as a function of initial dye concentration, contact time, temperature and pH. The amount of dye adsorbed increased while increasing the initial concentration and temperature of the solution. The experimental data fitted well to Pseudo second order kinetic model with Intra particle diffusion as the rate determining step. Adsorption data fitted with Langmuir model. The negative value of Gibb’s free energy (∆G°) indicated that the adsorption was spontaneous in nature. The results showed that the activated carbon of Thevetia peruviana was suitable for the removal of the reactive dyes from the aqueous solutions. The positive value of enthalpy ( ° ∆H ) indicated that the adsorption of the selected dyes were endothermic.