Orissa, India
Orissa, India

The North Orissa University is a public and open university located in the regional city of Baripada in the state of Orissa, India. The Government of Orissa under the Section 32 of the Orissa University Act, 1989 , established the North Orissa University and notified vide notification No. 880 dated 13 July 1998. The University is included in the list of Universities maintained under section 2 of the University Grants Commission Act, 1956, to impart higher education in the Tribal base area of Northern Orissa. The jurisdiction of the University extends over two districts, Mayurbhanj and Keonjhar. There are 80 affiliated colleges, both general and professional, catering to the demand of higher education. This university mainly provided higher education through the on-campus as well as distance education mode. It aims to provide job oriented technical courses in various fields. Wikipedia.

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Patra J.K.,North Orissa University | Thatoi H.N.,Orissa Engineering College, Bhubaneswar
Acta Physiologiae Plantarum | Year: 2011

Mangrove forests are salt tolerant plants confined to the coastal areas and occupy only 5% of the total forest areas of the world. These are the most hostile environment with fluctuating tidal and saline regime and a limited plant species can survive under such condition. Nevertheless, these plants are most valuable resources and provide economic and ecological benefits to the coastal people. Several mangrove species have been used in traditional medicine or have few applications as insecticide and pesticide. Mangroves are biochemically unique, producing wide array of natural products with unique bioactivity. They possess active metabolites with some novel chemical structures which belong to diverse chemical classes such as alkaloids, phenol, steroids, terpenoids, tannins, etc. The present review examines recent investigations on the biological activities of extracts and phytochemicals identified from mangroves and their associates as antimicrobial, antiviral, antioxidant, anticancer and many other properties like antiproliferative, insecticidal, antimalarial, antifeedant, central nervous system depressant and anti-plasmodial etc. The present article also emphasizes and creates an awareness of potential mangroves and their associates as a source of novel medicines, agrochemicals and source of many biologically active compounds. © 2010 Franciszek Górski Institute of Plant Physiology, Polish Academy of Sciences, Kraków.

Dhal B.,Indian National Metallurgical Laboratory | Thatoi H.N.,Orissa Engineering College, Bhubaneswar | Das N.N.,North Orissa University | Pandey B.D.,Indian National Metallurgical Laboratory
Journal of Hazardous Materials | Year: 2013

Chromium is a highly toxic non-essential metal for microorganisms and plants, and its occurrence is rare in nature. Lower to higher chromium containing effluents and solid wastes released by activities such as mining, metal plating, wood preservation, ink manufacture, dyes, pigments, glass and ceramics, tanning and textile industries, and corrosion inhibitors in cooling water, induce pollution and may cause major health hazards. Besides, natural processes (weathering and biochemical) also contribute to the mobility of chromium which enters in to the soil affecting the plant growth and metabolic functions of the living species. Generally, chemical processes are used for Cr- remediation. However, with the inference derived from the diverse Cr-resistance mechanism displayed by microorganisms and the plants including biosorption, diminished accumulation, precipitation, reduction of Cr(VI) to Cr(III), and chromate efflux, bioremediation is emerging as a potential tool to address the problem of Cr(VI) pollution. This review focuses on the chemistry of chromium, its use, and toxicity and mobility in soil, while assessing its concentration in effluents/wastes which becomes the source of pollution. In order to conserve the environment and resources, the chemical/biological remediation processes for Cr(VI) and their efficiency have been summarised in some detail. The interaction of chromium with various microbial/bacterial strains isolated and their reduction capacity towards Cr(VI) are also discussed. © 2013 Elsevier B.V..

Dash S.,North Orissa University | Swain S.K.,Veer Surendra Sai University of Technology | Swain S.K.,North Orissa University
Composites Science and Technology | Year: 2013

The nanocomposites of soy protein/boron nitride (soy/BN) were prepared successfully via solution technique with reinforcement of nanoboron nitride (BN). The dispersion of BN in the soy protein biopolymer was achieved by continuous sonication process. The interaction between soy protein and boron nitride was studied by Fourier transform infrared (FTIR) spectroscopy. The structural properties of hybrid nanocomposites were characterized by X-ray diffraction (XRD) and high resolution transmission electron microscopy (HRTEM). The thermal property of soy/BN nanocomposites were studied by thermogravimetric analysis (TGA). A significant improvement of thermal stability of soy protein was achieved due to incorporation of nanoBN. The substantial reduction in oxygen permeability was obtained by increasing the boron nitride loading. The biodegradability of the hybrid nanocomposite was studied using sludge water for 180. days. Further, it was found that the hybrid materials were resistant to mineral acid and alkali. © 2013 Elsevier Ltd.

Swain S.K.,North Orissa University
Journal of Polymer Engineering | Year: 2011

Polymer/clay nanocomposites were prepared by the single screw extruder with an attached die to an ultrasound of variable amplitude. The structure and morphology of nanocomposites were studied by X-ray diffraction (XRD) and transmission electron microscopy (TEM). Mechanical properties such as Young's modulus, elongation, breaking stress, toughness, yield stress and yield stain of ultrasonically treated nanocomposites were changed significantly in comparison to untreated nanocomposites. From rheology data, it was found that the complex viscosities of nanocomposites were increased with clay loading and decreased after ultrasonic treatment. It was found that both clay and ultrasonic intensity played a vitalrole in the dispersion of clay in the polymer matrix. From the differential scanning calorimeter (DSC) results it was found that the addition of clay in the nylon 6 matrix leads to a decrease of crystallization and this property increased ultrasonic amplitude. The oxygen permeability of PA6/clay nanocomposites was measured and it was found that a substantial reduction in oxygen permeability was observed by increasing clay loading. © 2011 by Walter de Gruyter. Berlin. Boston.

Prusty G.,North Orissa University | Swain S.K.,North Orissa University
Polymer Composites | Year: 2011

Graphite platelets were expanded by functionalization with inorganic acids followed by strong thermal treatment. The expanded graphite (EG) was exfoliated on the polyacrylonitrile (PAN) matrix through in situ emulsion sonication technique with different proportions of EG. The Ultraviolet-visible (UV) spectroscopy revealed the interaction between EG and PAN matrix. In Fourier Transform Infrared spectroscopy (FTIR), the chemical interaction between EG and the cyanide group of PAN was evidenced to the formation of PAN/EG composites. The X-ray diffraction pattern of raw graphite (RG), expanded graphite (EG), polyacrylonitrile (PAN), and PAN/EG nanocomposites were evidenced the dispersion of EG with the PAN matrix. The morphology of EG, PAN, and PAN/EG composites were studied by scanning electron microscopy (SEM) and transmission electron microscopy (TEM). The tensile strength of PAN/EG nanocomposite was measured and found to be increased with increase in EG concentrations. The conductivity and impedance of composites were measured as function of EG concentration. It was found that, conductivity of composites gradually increased with the increase in EG loading. Oxygen permeability of PAN/EG was reduced substantially with rise of EG proportion. To investigate the flame retardancy behavior of PAN/EG nanocomposites, the limiting oxygen indexes were calculated. © 2011 Society of Plastics Engineers.

Sahu B.,North Orissa University
Physical Review C - Nuclear Physics | Year: 2011

An approach we have proposed recently for calculation of Q α energy and decay half-life T1/2α on the α decay of radioactive heavy ions is applied to the evaluation of these two important parameters for the nuclei in the superheavy region Z = 112-118 for which experimental data are not available. It is shown that the α + nucleus potential represented by an exactly solvable potential used in the calculation could be expressed in terms of proton (Z) and neutron (N) numbers of the α emitter so that varieties of α-emitting nuclei differing in their Z and N values could be addressed for their decay properties without the help of any adjustable parameter and the results of Qα and T1/2α for a nucleus are estimated without any prior knowledge of any one of these quantities. This procedure to obtain the values of Qα and T1/2α works well to reproduce the known experimental results for superheavy nuclei and hence, the procedure is expected to provide proper information about these parameters in experiments on α decay of new nuclei in the superheavy region. © 2011 American Physical Society.

Mallick P.,North Orissa University
Materials Science-Poland | Year: 2014

Composites of hematite (α-Fe2O3) nanoparticles with different materials (NiO, TiO2, MnO2 and Bi 2O3) were synthesized. Effects of different materials on the microstructure and optical band gap of α-Fe2O3 nanoparticles were studied. Crystallite size and strain analysis indicated that the pure α-Fe2O3 nanoparticles were influenced by the presence of different materials in the composite sample. Crystallite size and strain estimated for all the samples followed opposite trends. However, the value of direct band gap decreased from ∼2.67 eV for the pure α-Fe2O3 nanoparticles to ∼2.5 eV for α-Fe2O3 composites with different materials. The value of indirect band gap, on the other hand, increased for all composite samples except for α-Fe2O3/Bi2O 3. © 2013 Versita Warsaw and Springer-Verlag Wien.

Dash S.,North Orissa University | Swain S.K.,Sambalpur University | Swain S.K.,North Orissa University
Carbohydrate Polymers | Year: 2013

Starch/silicon carbide (starch/SiC) bionanocomposites were synthesized by solution method using different wt% of silicon carbide with starch matrix. The interaction between starch and silicon carbide was studied by Fourier transform infrared (FTIR) spectroscopy. The structure of the bionanocomposites was investigated by X-ray diffraction (XRD) and field emission scanning electron microscope (FESEM). Thermal property of starch/SiC bionanocomposites was measured and a significant enhancement of thermal resistance was noticed. The oxygen barrier property of the composites was studied and a substantial reduction in permeability was observed as compared to the virgin starch. The reduction of oxygen permeability with enhancement of thermal stability of prepared bionanocomposites may enable the materials suitable for thermal resistant packaging and adhesive applications. © 2013 Elsevier Ltd. All rights reserved.

Sahu B.,North Orissa University
Physical Review C - Nuclear Physics | Year: 2012

We account for the extremely long (∼1018 yr) as well as short (∼10 -4 s) lifetimes of α decay in the cases of naturally occurring heavy α emitters with proton number Z=58-82 and successfully predict the results via an analytical expression for the decay half-life, developed by using an exactly solvable global potential in the theory of potential scattering. © 2012 American Physical Society.

Mallick P.,North Orissa University
Proceedings of the National Academy of Sciences India Section A - Physical Sciences | Year: 2014

Cu2O/CuO nanocomposite has been synthesised by sol–gel route. The microstructural and optical absorption analyses were carried out using X-ray diffraction (XRD) and UV–visible spectrophotometer. The presence of Cu2O in Cu2O/CuO nanocomposite did not affect the microstructure of CuO. However, the optical absorption band of CuO was influenced in the presence of Cu2O in Cu2O/CuO nanocomposite. The values of indirect and direct band gap of CuO in Cu2O/CuO nanocomposite showed higher red shift and lower blue shift when compared with the corresponding reported values of CuO nanoparticles. © 2014, The National Academy of Sciences, India.

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