Bhanja C.,Utkal University |
Jena S.,Utkal University |
Nayak S.,Ravenshaw University |
Mohapatra S.,Ravenshaw University
Beilstein Journal of Organic Chemistry | Year: 2012
Enantioselective organocatalysis has become a field of central importance within asymmetric chemical synthesis and appears to be efficient approach toward the construction of complex chiral molecules from simple achiral materials in one-pot transformations under mild conditions with high stereocontrol. This review addresses the most significant synthetic methods reported on chiralamine- catalyzed tandem Michael conjugate addition of heteroatom-centered nucleophiles to α,β-unsaturated compounds followed by cyclization reactions for the enantioselective construction of functionalized chiral chromenes, thiochromenes and 1,2-dihydroquinolines in optically enriched forms found in a myriad of bioactive natural products and synthetic compounds. © 2012 Bhanja et al; licensee Beilstein-Institut.
Mahapatra R.,Siksha ‘O’ Anusandhan University |
Ray S.K.,Ravenshaw University
International Journal of Pharma and Bio Sciences | Year: 2013
Excess free energy of mixing and excess molar polarization in the binary mixtures of alcohols in non polar solvents like n-pentane, n-hexane, n-heptane and cyclohexane are evaluated considering polar-polar interaction only and polar-polar interaction with polarnon polar interaction. The important observation obtained from the calculation of excess free energy and excess molar polarization clearly indicates that polar-non polar interaction in comparison to polar-polar interaction bears a major role. The decrease in excess free energy after 0.2 mole fraction of polar liquids is due to the formation of domain barriers of non polar molecules in polar molecules which prevents the induced spontaneous polarization in polar liquids. The excess free energy and excess molar polarization is more in n-pentane and n-heptane as induced polarization plays a vital role due to the presence of an odd number of carbon atoms in n-pentane and nheptane.
Mohapatra H.,Kaptipada College |
Goswami S.,Ravenshaw University
Asian Journal of Water, Environment and Pollution | Year: 2012
Noise assessment is carried out in various residential, commercial and industrial places in and around Belpahar and Brajarajnagar of Ib River coalfield. The average noise intensities at various residential places range from 57.10 to 63.25 dB during day time (6 am-10 pm) and from 46.77 to 56.22 dB during night (10 pm-6 am). It clearly demonstrates that the noise levels are in close proximity or beyond the permissible limit. Though the average noise intensities at various commercial and industrial places are within the permissible limit, the Lmax noise values are more than the permissible limit. Analysis of variance is also computed for different residential, commercial and industrial places to infer the level of significance.
Goswami S.,Ravenshaw University |
Swain B.K.,Utkal University
Journal of Environmental Biology | Year: 2012
The environmental noise in some commercial banks of Balasore, in terms of standard noise indices was worked out in the present study. Noise pollution was assessed in twenty different commercial banks of the city on 31st August, 2010 and during first week of September, 2010. The present noise monitoring was conducted with the help of sound level meter, which was calibrated acoustically using an external reference source, and placed over the microphone. It is inferred that the noise levels were more than the permissible limit i.e. 50 dB as prescribed in USA in all the investigated banks of Balasore and the maximum noise levels were around double of the said permissible limit, which is a contradiction with that of developed countries. Analysis of variance was also computed for all the banks during peak hour (10a.m.-12noon). The mean values of noise levels in different banks ranged from 75.5 to 90dB; from 69 to 83.6dB and 71.5 to 83.5dB during 10a.m.-12noon, 12-2p.m. and 24p.m., respectively. It was categorically observed that noise levels were more during 10a.m.-12noon than other investigated time intervals in all the 20 investigated banks. It is imperative to mention here that such an attempt of assessing noise in banks is first of its kind in India. © Triveni Enterprises.
Mohanty G.,Ravenshaw University |
Ghosh S.N.,Ravenshaw University
Archives of Gynecology and Obstetrics | Year: 2015
Introduction: Cervical cancer is a major health problem of Indian women. It is the second most cancer after breast cancer. In India, every year many women suffer from this cancer because they are illiterate and ignored about cervix cancer severity. As India is a socio-economically backward country of the world, most of the women visiting doctor are from rural areas, they have poor hygienic conditions and many more cervical cancer risk factors. Result: So this review is an attempt to discuss about all of the major risk factors for cervical cancer, screening factors and detection methods for cervical cancer. Conclusion: It aims to keep women of India keeping aside in rural areas informed about cervical cancer severity and its method of detection. © Springer-Verlag Berlin Heidelberg 2014.
Naik S.K.,Ravenshaw University |
Chand P.K.,Utkal University
Plant Cell Reports | Year: 2011
The past 30 years have witnessed a series of systematic biotechnological advances made in pomegranate. These encompass optimization and establishment of in vitro culture techniques including micropropagation, somatic embryogenesis, synthetic seed production, plant regeneration via callus-mediated shoot organogenesis, adventitious shoot regeneration, anther culture, tetraploid induction and genetic transformation. This review attempts to provide a comprehensive account on the tissue culture-mediated biotechnological interventions made in pomegranate aimed at complementing conventional programmes for improvement of this nutraceutically important fruit crop. © 2010 Springer-Verlag.
Mahapatra R.,Siksha ‘O’ Anusandhan University |
Ray S.K.,Ravenshaw University
Journal of Molecular Liquids | Year: 2014
Excess free energy of mixing and excess molar polarization in the binary mixtures of ketones (acetone, MIBK, DIBK and acetyl acetone) in nonpolar solvents (carbon tetrachloride, Benzene, cyclohexane and n-heptane) is evaluated by Winkelmann-Quitzsch (WQ) and Ray et al. theory by using the experimental findings of relative permittivity and refractive index. The trend of variation of excess free energy of mixing and excess correlation factor depicts a clear picture of molecular association and liquid structure in the binary mixtures. The induction effect is less due to the steric hindrance of isobutyl group of DIBK and the short range interactions between the molecules are least for which WQ and Ray et al. modified equations hold good for the binary mixture of DIBK and nonpolar solvents at the same molar concentration of polar solvents. However, the induction effect is more in acetyl acetone in comparison to acetone and MIBK for which the peak value of ΔFab/ΔP ab lies in the region of 0.2 mol fraction of polar liquids whereas the peak value of ΔFWQ/ΔPWQ lies in the equimolar concentration of polar and nonpolar solvents. The observation clearly indicates that the polar-induced nonpolar interaction and induced nonpolar-induced nonpolar interaction in binary liquid mixtures contributes a lot to decrease the excess molar polarization in acetone, MIBK and acetyl acetone. © 2013 Elsevier B.V.
Jena S.,Utkal University |
Jena S.,Ravenshaw University
Neurological Sciences | Year: 2015
The present study reports the effect of 6-n-propylthiouracil (PTU)-induced hypothyroidism on oxidative stress parameter, lipid peroxidation (LPx) and major antioxidant enzyme expressions such as superoxide dismutase (SOD: SOD1 and SOD2) and catalase (CAT) in cerebral cortex rat brain during postnatal persistent (90 days PTU treatment from birth) and transient (30 days PTU treatment from birth followed by PTU withdrawal for 60 days) hypothyroidism. Enhanced level of LPx was observed in transient hypothyroid rats with respect to control and persistent hypothyroid rats. Significantly increased activity of SOD and expression of SOD1 were observed in cerebral cortex of both persistent and transient hypothyroid rats as compared to control. However, unaltered translated level of SOD2 was observed among the groups. Activity of CAT was increased in transient hypothyroid rats, whereas translate level of CAT was increased in both the regions of persistent as well as transient hypothyroidism. The histoarchitecture of cerebral cortex clearly showed a decline in neuronal migration with neurons packed together in both persistent and transient hypothyroid rats as compared to control. These results suggest that deprivation of thyroid hormone modulates redox status and causes oxidative stress in rat brain cerebral cortex during postnatal development and maturation. © 2015, Springer-Verlag Italia.
Panda B.K.,Ravenshaw University |
Panda S.,Ravenshaw University
Superlattices and Microstructures | Year: 2013
In the present paper, the effect of a high-frequency laser field on a single asymmetric rectangular quantum well is studied in the Fourier series method. The effect of laser field on the confining potential of the quantum well is taken through the laser dressing parameter which depends upon the strength of intensity and the magnitude of frequency of the laser field. The step type confining potential of the rectangular asymmetric well is modified by the laser dressing parameter to a smooth function. In this quantum well, linear, third-order nonlinear, nonlinear optical rectification and second harmonic generation susceptibilities under another laser source with low frequency are calculated using the density matrix method. The linewidths for susceptibilities are estimated taking the electron scattering with the longitudinal optic phonon. Compared to laser undressed well, the nonlinear optical properties in the laser dressed well are blue shifted and enhanced due to larger energy separations and oscillator strengths, respectively. © 2013 Elsevier B.V. All rights reserved.
Mishra P.,Utkal University |
Samanta L.,Ravenshaw University
The Scientific World Journal | Year: 2012
Increased or reduced action of thyroid hormone on certain molecular pathways in the heart and vasculature causes relevant cardiovascular derangements. It is well established that hyperthyroidism induces a hyperdynamic cardiovascular state, which is associated with a faster heart rate, enhanced left ventricular systolic and diastolic function whereas hypothyroidism is characterized by the opposite changes. Hyperthyroidism and hypothyroidism represent opposite clinical conditions, albeit not mirror images. Recent experimental and clinical studies have suggested the involvement of ROS tissue damage under altered thyroid status. Altered-thyroid state-linked changes in heart modify their susceptibility to oxidants and the extent of the oxidative damage they suffer following oxidative challenge. Chronic increase in the cellular levels of ROS can lead to a catastrophic cycle of DNA damage, mitochondrial dysfunction, further ROS generation and cellular injury. Thus, these cellular events might play an important role in the development and progression of myocardial remodeling and heart failure in altered thyroid states (hypo- and hyper-thyroidism). The present review aims at elucidating the various signaling pathways mediated via ROS and their modulation under altered thyroid state and the possibility of antioxidant therapy. Copyright © 2012 Pallavi Mishra and Luna Samanta.