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Dutta P.,Bejoy Narayan Mahavidyalaya | Dutta M.,Sreegopal Banerjee College
Asian Journal of Chemistry | Year: 2012

Using density function theory methods (B3LYP) the molecular structures of various substituted aziridine compounds, both in their ground states as well as their planar shaped transition states, corresponding to nitrogen inversion process, were determined. The energy, enthalpy, free energy changes along with the activation energy and rate constants for such nitrogen inversions were determined for these substituted aziridine compounds. The impacts of introduction of substituents like methyl, ethyl, isopropyl, phenyl on nitrogen inversion were determined. The change of barrier energy for nitrogen inversion on changing the substituent on N-atom of the aziridine ring was also determined. The results predict that introduction of electronegative element on N-atom of the aziridine moiety leads to an increase in energy barrier; the out of ring substituent also increases the barrier energy towards such inversion. Thus such increase in barrier energy will facilitate the isolation of various chiral aziridine units. Source

Dutta M.,Sreegopal Banerjee College | Dutta P.,Bejoy Narayan Mahavidyalaya
Oriental Journal of Chemistry | Year: 2013

The nutritional capacity of the fish Monopterus chuchia in terms of its fatty acid content was investigated to get an insight of their fatty acid composition in their most consumed part i.e. their muscle tissue. Our investigation shows the presence of SFA's like caproic acid, caprylic acid, palmitic acid, pentadecanoic acid, heptadecanoic acid, behenic acid, MUFA's like myristoleic acid, palmitoleic acid, oleic acid and nutritionally important PUFA's like Eicosapentaenoic acid, docosahexaenoic acid in major amount. Erucic acid, which is reported to be an anti-nutritional factor, is present in extremely low concentration. Thus the fish which is generally consumed by very few can be farmed as a cheap nutritional source for the masses. Source

Dutta P.,Bejoy Narayan Mahavidyalaya | Dutta M.,Sreegopal Banerjee College
Asian Journal of Chemistry | Year: 2014

Fatty acid profiles of three major carps Catla catla, Labeo rohita and Cirrhinus mrigala found and consumed in West Bengal, India were investigated and compared to draw a conclusion on how rich they are in their fatty acid composition in their most consumed part i.e. their muscle tissues. After analysis we have found that all the three carps investigated are rich in poly unsaturated fatty acid and the major poly unsaturated fatty acids are docosahexaenoic acid, eicosapentaenoic acid and arachidonic acid. The major saturated fatty acids detected in all the three carps are palmitic acid (C16:0) and stearic acid (C18:0). Oleic acid (C18:1 n-9) is the major mono unsaturated fatty acid present in these carps. Erucic acid (C22:1 n-9), which is reported to be an antinutritional factor is present in very low concentration. Thus one can conclude that these three fish species if farmed meticulously i.e. given the proper growing conditions, can be nutritious and low cost healthy diet for the population of Bengal. Source

Dutta P.,Bejoy Narayan Mahavidyalaya | Dutta M.,Sreegopal Banerjee College
Oriental Journal of Chemistry | Year: 2014

Monthly and seasonal variation in the amount of total lipid and fatty acid in the muscle tissues of W. attu growing wild in large ponds was studied. The result depicts that both the amounts of total lipid and fatty acid varied monthly and thus seasonally in this fish species (boal) belonging to the family of fresh water silurid cat fishes. The percentage of total lipid value reaches its minimum in May and starts increasing from June to October. During breeding season the amount of total fatty acid also shows the same tendency to decrease till May when it reaches its minimum. From June onwards the total fatty acid increases significantly. At the end of the reproductive season, i.e. during the commencement of the nutritional season, the fishes start the process of storing energy in the form of lipids / fatty acids for future use i.e. during reproduction season or during scarcity of food. This is what is reflected in the study that, during the monsoon months in West Bengal the lipid / fatty acid content in the muscle tissues of boal rises to the maximum. This starts decreasing in the winter season as the reproduction period approaches and reaches its minimum in summer. Source

Shit S.,Jalpaiguri Government Engineering College | Layek A.,Bejoy Narayan Mahavidyalaya
Journal of Materials Science: Materials in Electronics | Year: 2015

Nanocrystalline cadmium(II) oxide were obtained by calcining a hydrated cadmium-organic hybrid precursor, (C10H2O8)Cd2·xH2O, obtained by a chemical reduction method using cadmium acetate dihydrate, 1,2,4,5-benzenetetracarboxylic acid, and triethylamine. Calcined CdO at different temperature possess different morphology, revealed by field emission scanning electron microscope analysis. In this article, the photosensitivity, dielectric behavior, frequency dependant loss-tangent and complex impedance spectra of the morphology driven CdO nanoparticles were studied aptly. © 2015 Springer Science+Business Media New York Source

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