- Singur, West Bengal, India
Sandipan Chatterjee
Central leather research Institute, Rced, Faculty Member
An approach towards the highly functionalized bicyclo[3.3.1]nonan-9-one core present in the phloroglucin natural products guttiferone A and hypersampsone F is disclosed in which the key C7 and C8 stereogenic centres have been successfully... more
An approach towards the highly functionalized bicyclo[3.3.1]nonan-9-one core present in the phloroglucin natural products guttiferone A and hypersampsone F is disclosed in which the key C7 and C8 stereogenic centres have been successfully installed.
Research Interests:
A bacterial strain, Bacillus cereus M116 (MTCC 5521), isolated and identified in our laboratory produces a green pigment when grown in nutrient broth at stationary condition. Optimum fermentation parameters for maximum pigment production... more
A bacterial strain, Bacillus cereus M116 (MTCC 5521), isolated and identified in our laboratory produces a green pigment when grown in nutrient broth at stationary condition. Optimum fermentation parameters for maximum pigment production are pH 7.0, temperature 30°C, time of incubation 72 h and inoculum volume 1% from 20 h grown cell suspension. Magnesium ion enhances pigment production whereas calcium and zinc ions inhibit the process. The pigment is better extracted from the fermented broth with chloroform in comparison with diethyl ether, ethyl acetate, and butanol. The extracted crude pigment consists of three fractions as revealed from thin layer chromatogram on silica gel GF254 using ethyl acetate and hexane (1:1) solvent system. The major fraction C3 shows antibacterial activity against different gram positive bacteria. The proposed structure of C3 is 9-methyl-1,4,5,8-tetra-azaphenanthrene obtained by elemental analysis, GC-MS, and NMR spectra studies.
Research Interests:
The process of sorption is being increasingly used for ecofriendly and economic remediation of textile dye effluents. The present model study deals with the adsorption of a model anionic dye, eosin Y, from wastewater using conditioned... more
The process of sorption is being increasingly used for ecofriendly and economic remediation of textile dye effluents. The present model study deals with the adsorption of a model anionic dye, eosin Y, from wastewater using conditioned chitosan hydrobeads. Conditioning reduced the pH sensitivity and maintained the maximum sorption capacity of the beads near pH 8. To understand the chemicophysical characteristics of the adsorption process we studied, the kinetics and isotherm behavior of the system. It was observed that temperature played a significant role in the process. The Langmuir model was found to be most appropriate for the description of the adsorption process. The kinetic results followed a second-order equation. It was observed that 1 g of chitosan adsorbed ∼76 mg∼76 mg of eosin Y. The dye was desorbed from the beads by changing the pH of the solution, and the conditioned chitosan beads were reused five times without any loss of mechanical and chemical efficacy.
Research Interests:
Edible mushroom Pleurotus sajor-caju was grown under submerged condition in deproteinized whey supplemented with diammonium hydrogen phosphate and plant growth hormones, viz. indole-3-acetic acid (IAA), gibberellic acid (GA3) and kinetin... more
Edible mushroom Pleurotus sajor-caju was grown under submerged condition in deproteinized whey supplemented with diammonium hydrogen phosphate and plant growth hormones, viz. indole-3-acetic acid (IAA), gibberellic acid (GA3) and kinetin (KIN). The hormones, at different concentrations, increased the biomass production of P. sajor-caju by 15–26%. However, increase in protein content of the mycelia was relatively small (3–5%) over the control. Maximum enhancement was observed with indole-3-acetic acid. Twenty-eight percent more protein could be harvested from 1 l of whey containing 2 mg l−1 of indole-3-acetic acid.
Research Interests:
Supplementation of molasses–salt medium with plant growth hormones, viz., indoleacetic acid, indolebutyric acid, kinetin and gibberellic acid, increased chitosan production by Mucor rouxii as well as its growth at different optimum... more
Supplementation of molasses–salt medium with plant growth hormones, viz., indoleacetic acid, indolebutyric acid, kinetin and gibberellic acid, increased chitosan production by Mucor rouxii as well as its growth at different optimum concentrations. The increase in yield of chitosan was found to range from 34% to 69% and mycelial growth from 12% to 17.4%. Gibberellic acid was the most potent in this respect. Sixty-nine percent more chitosan over the control could be obtained from 1 l of the medium supplemented with 3 mg gibberellic acid. Degree of acetylation of chitosan (∼13%) was not changed due to addition of hormone in the medium but weight average molecular weight of chitosan increased by more than 50%. Thus, the plant growth hormones add a value to chitosan by increasing its molecular weight.
Research Interests:
Chitosan prepared from shrimp shell was made partially water-soluble by hydrolyzing with 7% acetic acid. This chitosan at low concentration was found to be effective in the clarification of different fruit juices. Appearance and... more
Chitosan prepared from shrimp shell was made partially water-soluble by hydrolyzing with 7% acetic acid. This chitosan at low concentration was found to be effective in the clarification of different fruit juices. Appearance and acceptability of the juices after treatment with chitosan significantly increased on a nine point Hedonic scale.
Research Interests:
A bacterial strain, Bacillus cereus M116 (MTCC 5521), isolated and identified in our laboratory produces a green pigment when grown in nutrient broth at stationary condition. Optimum fermentation parameters for maximum pigment production... more
A bacterial strain, Bacillus cereus M116 (MTCC 5521), isolated and identified in our laboratory produces a green pigment when grown in nutrient broth at stationary condition. Optimum fermentation parameters for maximum pigment production are pH 7.0, temperature 30°C, time of incubation 72 h and inoculum volume 1% from 20 h grown cell suspension. Magnesium ion enhances pigment production whereas calcium and zinc ions inhibit the process. The pigment is better extracted from the fermented broth with chloroform in comparison with diethyl ether, ethyl acetate, and butanol. The extracted crude pigment consists of three fractions as revealed from thin layer chromatogram on silica gel GF254 using ethyl acetate and hexane (1:1) solvent system. The major fraction C3 shows antibacterial activity against different gram positive bacteria. The proposed structure of C3 is 9-methyl-1,4,5,8-tetra-azaphenanthrene obtained by elemental analysis, GC-MS, and NMR spectra studies.
Research Interests:
The process of sorption is being increasingly used for ecofriendly and economic remediation of textile dye effluents. The present model study deals with the adsorption of a model anionic dye, eosin Y, from wastewater using conditioned... more
The process of sorption is being increasingly used for ecofriendly and economic remediation of textile dye effluents. The present model study deals with the adsorption of a model anionic dye, eosin Y, from wastewater using conditioned chitosan hydrobeads. Conditioning reduced the pH sensitivity and maintained the maximum sorption capacity of the beads near pH 8. To understand the chemicophysical characteristics of the adsorption process we studied, the kinetics and isotherm behavior of the system. It was observed that temperature played a significant role in the process. The Langmuir model was found to be most appropriate for the description of the adsorption process. The kinetic results followed a second-order equation. It was observed that 1 g of chitosan adsorbed ∼76 mg∼76 mg of eosin Y. The dye was desorbed from the beads by changing the pH of the solution, and the conditioned chitosan beads were reused five times without any loss of mechanical and chemical efficacy.
Research Interests:
Physico-chemical investigation on adsorption of congo red, an anionic azo dye by chitosan hydrobeads has been carried out. Adsorption process has been found to be dependant on temperature with optimum activity at 30 °C. Both ionic... more
Physico-chemical investigation on adsorption of congo red, an anionic azo dye by chitosan hydrobeads has been carried out. Adsorption process has been found to be dependant on temperature with optimum activity at 30 °C. Both ionic interaction as well as physical forces is responsible for binding of congo red with chitosan. Theoretical correlation of the experimental equilibrium adsorption data for congo red–chitosan hydrobeads system would be best explained by linearized form of Langmuir isotherm model. The kinetic results follow pseudo second-order rate equation. pH of the experimental solution influenced congo red adsorption inversely, and ∼20.0% of the dye could be desorbed from the loaded beads by changing the pH of the solution to alkaline range (∼pH 12.0). Both sodium chloride and sodium dodecyl sulfate significantly influenced the adsorption process.
Research Interests: Engineering, Kinetics, Modeling, Nanoparticle, Wastewater Treatment, and 25 moreScanning Electron Microscopy, Nanoparticles, Adsorption, Microemulsion, Ph, Textile, Physical sciences, Mechanism, Hazardous Materials, Surfactant, Carcinogens, Desorption, CHEMICAL SCIENCES, Second Order, X ray diffraction, Waste Water, Equilibrium, Adsorption Isotherm Models, Congo Red, Zeta Potential, Aqueous Solution, Hydrogen-Ion Concentration, Sodium Chloride, Ferric Compounds, and Langmuir Isotherm(Scanning Electron Microscopy, Nanoparticles, Adsorption, Microemulsion, Ph, Textile, Physical sciences, Mechanism, Hazardous Materials, Surfactant, Carcinogens, Desorption, CHEMICAL SCIENCES, Second Order, X ray diffraction, Waste Water, Equilibrium, Adsorption Isotherm Models, Congo Red, Zeta Potential, Aqueous Solution, Hydrogen-Ion Concentration, Sodium Chloride, Ferric Compounds, and Langmuir Isotherm)
(Scanning Electron Microscopy, Nanoparticles, Adsorption, Microemulsion, Ph, Textile, Physical sciences, Mechanism, Hazardous Materials, Surfactant, Carcinogens, Desorption, CHEMICAL SCIENCES, Second Order, X ray diffraction, Waste Water, Equilibrium, Adsorption Isotherm Models, Congo Red, Zeta Potential, Aqueous Solution, Hydrogen-Ion Concentration, Sodium Chloride, Ferric Compounds, and Langmuir Isotherm)
Edible mushroom Pleurotus sajor-caju was grown under submerged condition in deproteinized whey supplemented with diammonium hydrogen phosphate and plant growth hormones, viz. indole-3-acetic acid (IAA), gibberellic acid (GA3) and kinetin... more
Edible mushroom Pleurotus sajor-caju was grown under submerged condition in deproteinized whey supplemented with diammonium hydrogen phosphate and plant growth hormones, viz. indole-3-acetic acid (IAA), gibberellic acid (GA3) and kinetin (KIN). The hormones, at different concentrations, increased the biomass production of P. sajor-caju by 15–26%. However, increase in protein content of the mycelia was relatively small (3–5%) over the control. Maximum enhancement was observed with indole-3-acetic acid. Twenty-eight percent more protein could be harvested from 1 l of whey containing 2 mg l−1 of indole-3-acetic acid.
Research Interests:
The effect of some plant growth hormones, viz., gibberellic acid, indole-3-acetic acid, indole-3-butyric acid, and kinetin on chitosan production by Rhizopus oryzae in deproteinized whey was studied. Hormones, at different concentrations,... more
The effect of some plant growth hormones, viz., gibberellic acid, indole-3-acetic acid, indole-3-butyric acid, and kinetin on chitosan production by Rhizopus oryzae in deproteinized whey was studied. Hormones, at different concentrations, increase the mycelial growth by 19–32%. However, increase in chitosan content of the mycelia was relatively small (1.7–14.3%) over the control. Maximum enhancement was observed with gibberellic acid. Fifty percent more chitosan could be obtained from 1 L of whey containing 0.1 mg/L gibberellic acid. Hormones, at higher dose, instead of stimulation inhibited both growth and mycelial chitosan content. This study showed that hormones have no influence on degree of deacetylation of chitosan but increase the quality of the chitosan by increasing weight average molecular weight and decreasing polydispersity. All the hormones had been found to enhance chitin deacetylase activity of R. oryzae by 1.067–1.267-fold and may be one of the reasons for increased chitosan production.
Research Interests:
Supplementation of molasses–salt medium with plant growth hormones, viz., indoleacetic acid, indolebutyric acid, kinetin and gibberellic acid, increased chitosan production by Mucor rouxii as well as its growth at different optimum... more
Supplementation of molasses–salt medium with plant growth hormones, viz., indoleacetic acid, indolebutyric acid, kinetin and gibberellic acid, increased chitosan production by Mucor rouxii as well as its growth at different optimum concentrations. The increase in yield of chitosan was found to range from 34% to 69% and mycelial growth from 12% to 17.4%. Gibberellic acid was the most potent in this respect. Sixty-nine percent more chitosan over the control could be obtained from 1 l of the medium supplemented with 3 mg gibberellic acid. Degree of acetylation of chitosan (∼13%) was not changed due to addition of hormone in the medium but weight average molecular weight of chitosan increased by more than 50%. Thus, the plant growth hormones add a value to chitosan by increasing its molecular weight.
Research Interests:
Chitosan prepared from shrimp shell was made partially water-soluble by hydrolyzing with 7% acetic acid. This chitosan at low concentration was found to be effective in the clarification of different fruit juices. Appearance and... more
Chitosan prepared from shrimp shell was made partially water-soluble by hydrolyzing with 7% acetic acid. This chitosan at low concentration was found to be effective in the clarification of different fruit juices. Appearance and acceptability of the juices after treatment with chitosan significantly increased on a nine point Hedonic scale.
Research Interests:
Physico-chemical investigation on adsorption of congo red, an anionic azo dye by chitosan hydrobeads has been carried out. Adsorption process has been found to be dependant on temperature with optimum activity at 30 °C. Both ionic... more
Physico-chemical investigation on adsorption of congo red, an anionic azo dye by chitosan hydrobeads has been carried out. Adsorption process has been found to be dependant on temperature with optimum activity at 30 °C. Both ionic interaction as well as physical forces is responsible for binding of congo red with chitosan. Theoretical correlation of the experimental equilibrium adsorption data for congo red–chitosan hydrobeads system would be best explained by linearized form of Langmuir isotherm model. The kinetic results follow pseudo second-order rate equation. pH of the experimental solution influenced congo red adsorption inversely, and ∼20.0% of the dye could be desorbed from the loaded beads by changing the pH of the solution to alkaline range (∼pH 12.0). Both sodium chloride and sodium dodecyl sulfate significantly influenced the adsorption process.
Research Interests: Engineering, Kinetics, Modeling, Nanoparticle, Wastewater Treatment, and 25 moreScanning Electron Microscopy, Nanoparticles, Adsorption, Microemulsion, Ph, Textile, Physical sciences, Mechanism, Hazardous Materials, Surfactant, Carcinogens, Desorption, CHEMICAL SCIENCES, Second Order, X ray diffraction, Waste Water, Equilibrium, Adsorption Isotherm Models, Congo Red, Zeta Potential, Aqueous Solution, Hydrogen-Ion Concentration, Sodium Chloride, Ferric Compounds, and Langmuir Isotherm(Scanning Electron Microscopy, Nanoparticles, Adsorption, Microemulsion, Ph, Textile, Physical sciences, Mechanism, Hazardous Materials, Surfactant, Carcinogens, Desorption, CHEMICAL SCIENCES, Second Order, X ray diffraction, Waste Water, Equilibrium, Adsorption Isotherm Models, Congo Red, Zeta Potential, Aqueous Solution, Hydrogen-Ion Concentration, Sodium Chloride, Ferric Compounds, and Langmuir Isotherm)
(Scanning Electron Microscopy, Nanoparticles, Adsorption, Microemulsion, Ph, Textile, Physical sciences, Mechanism, Hazardous Materials, Surfactant, Carcinogens, Desorption, CHEMICAL SCIENCES, Second Order, X ray diffraction, Waste Water, Equilibrium, Adsorption Isotherm Models, Congo Red, Zeta Potential, Aqueous Solution, Hydrogen-Ion Concentration, Sodium Chloride, Ferric Compounds, and Langmuir Isotherm)
The effect of some plant growth hormones, viz., gibberellic acid, indole-3-acetic acid, indole-3-butyric acid, and kinetin on chitosan production by Rhizopus oryzae in deproteinized whey was studied. Hormones, at different concentrations,... more
The effect of some plant growth hormones, viz., gibberellic acid, indole-3-acetic acid, indole-3-butyric acid, and kinetin on chitosan production by Rhizopus oryzae in deproteinized whey was studied. Hormones, at different concentrations, increase the mycelial growth by 19–32%. However, increase in chitosan content of the mycelia was relatively small (1.7–14.3%) over the control. Maximum enhancement was observed with gibberellic acid. Fifty percent more chitosan could be obtained from 1 L of whey containing 0.1 mg/L gibberellic acid. Hormones, at higher dose, instead of stimulation inhibited both growth and mycelial chitosan content. This study showed that hormones have no influence on degree of deacetylation of chitosan but increase the quality of the chitosan by increasing weight average molecular weight and decreasing polydispersity. All the hormones had been found to enhance chitin deacetylase activity of R. oryzae by 1.067–1.267-fold and may be one of the reasons for increased chitosan production.
Research Interests:
Research Interests:
Research Interests:
Abstract Pigments, anthocyanin and carotenoids are natural compounds that are attractive in color and easy to extract. Astaxanthin is the principal carotenoid pigment responsible for the distinctive orange red pigmentation in marine... more
Abstract Pigments, anthocyanin and carotenoids are natural compounds that are attractive in color and easy to extract. Astaxanthin is the principal carotenoid pigment responsible for the distinctive orange red pigmentation in marine invertebrates, fish, birds, salmonids and ...
Research Interests: Applied()
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