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    • Several versions

    Treatment efficacy of algae-based sewage treatment plants

    Mahapatra, Durga, Chanakya, H., Ramachandra, T.
    Environmental Monitoring and Assessment, 2013, Vol.185(9), pp.7145-7164 [Peer Reviewed Journal]

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    Euglena sp. as a suitable source of lipids for potential use as biofuel and sustainable wastewater treatment

    Mahapatra, Durga, Chanakya, H., Ramachandra, T.
    Journal of Applied Phycology, 2013, Vol.25(3), pp.855-865 [Peer Reviewed Journal]
    Springer Science & Business Media B.V.
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    Title: Euglena sp. as a suitable source of lipids for potential use as biofuel and sustainable wastewater treatment
    Author: Mahapatra, Durga; Chanakya, H.; Ramachandra, T.
    Subject: Algal nutrient uptake ; Biomass productivity ; Euglena ; FAME ; Lipid ; Wastewater
    Description: Prolific algal growth in sewage ponds with high organic loads in the tropical regions can provide cost-effective and efficient wastewater treatment and biofuel production. This work examines the ability of Euglena sp. growing in wastewater ponds for biofuel production and treatment of wastewater. The algae were isolated from the sewage treatment plants and were tested for their nutrient removal capability. Compared to other algae, Euglena sp. showed faster growth rates with high biomass density at elevated concentrations of ammonium nitrogen (NH 4 -N) and organic carbon (C). Profuse growth of these species was observed in untreated wastewaters with a mean specific growth rate ( μ ) of 0.28 day −1 and biomass productivities of 132 mg  L −1   day −1 . The algae cultured within a short period of 8 days resulted in the 98 % removal of NH 4 -N, 93 % of total nitrogen 85 % of ortho -phosphate, 66 % of total phosphate and 92 % total organic carbon. Euglenoids achieved a maximum lipid content of 24.6 % ( w / w ) with a biomass density of 1.24 g  L −1 (dry wt.). Fourier transform infrared spectra showed clear transitions in biochemical compositions with increased lipid/protein ratio at the end of the culture. Gas chromatography and mass spectrometry indicated the presence of high contents of palmitic, linolenic and linoleic acids (46, 23 and 22 %, respectively), adding to the biodiesel quality. Good lipid content (comprised quality fatty acids), efficient nutrient uptake and profuse biomass productivity make the Euglena sp. as a viable source for biofuel production in wastewaters.
    Is part of: Journal of Applied Phycology, 2013, Vol.25(3), pp.855-865
    Identifier: 0921-8971 (ISSN); 1573-5176 (E-ISSN); 10.1007/s10811-013-9979-5 (DOI)

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    Algal biofuel production and mitigation potential in India

    Chanakya, H., Mahapatra, Durga, Sarada, R., Abitha, R.
    Mitigation and Adaptation Strategies for Global Change, 2013, Vol.18(1), pp.113-136 [Peer Reviewed Journal]
    Springer Science & Business Media B.V.
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    Title: Algal biofuel production and mitigation potential in India
    Author: Chanakya, H.; Mahapatra, Durga; Sarada, R.; Abitha, R.
    Subject: Algal biofuel ; Wastewater algae ; Paddy-algiculture ; Multi-tier ; Multi-cyclic algiculture ; Algal biomethane
    Description: Energy and energy services are the backbone of growth and development in India and is increasingly dependent upon the use of fossil based fuels that lead to greenhouse gases (GHG) emissions and related concerns. Algal biofuels are being evolved as carbon (C) - neutral alternative biofuels. Algae are photosynthetic microorganisms that convert sunlight, water and carbon dioxide (CO 2 ) to various sugars and lipids Tri-Acyl-Glycols (TAG) and show promise as an alternative, renewable and green fuel source for India. Compared to land based oilseed crops algae have potentially higher yields (5–12 g/m 2 /d) and can use locations and water resources not suited for agriculture. Within India, there is little additional land area for algal cultivation and therefore needs to be carried out in places that are already used for agriculture, e.g. flooded paddy lands (20 Mha) with village level technologies and on saline wastelands (3 Mha). Cultivating algae under such conditions requires novel multi-tier, multi-cyclic approaches of sharing land area without causing threats to food and water security as well as demand for additional fertilizer resources by adopting multi-tier cropping (algae-paddy) in decentralized open pond systems. A large part of the algal biofuel production is possible in flooded paddy crop land before the crop reaches dense canopies, in wastewaters (40 billion litres per day), in salt affected lands and in nutrient/diversity impoverished shallow coastline fishery. Mitigation will be achieved through avoidance of GHG, C-capture options and substitution of fossil fuels. Estimates made in this paper suggest that nearly half of the current transportation petro-fuels could be produced at such locations without disruption of food security, water security or overall sustainability. This shift can also provide significant mitigation avenues. The major adaptation needs are related to socio-technical acceptance for reuse of various wastelands, wastewaters and waste-derived energy and by-products through policy and attitude change efforts.
    Is part of: Mitigation and Adaptation Strategies for Global Change, 2013, Vol.18(1), pp.113-136
    Identifier: 1381-2386 (ISSN); 1573-1596 (E-ISSN); 10.1007/s11027-012-9389-z (DOI)

    • Several versions

    Expectation of forward-backward rapidity correlations in $p+p$ collisions at the LHC energies

    Dash, Ajay Kumar, Mahapatra, Durga Prasad, Mohanty, Bedangadas

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    Non-Extensive Statistics in Free-Electron Metals and Thermal Effective Mass

    Khuntia, Arvind, Sahu, Gayatri, Sahoo, Raghunath, Mahapatra, Durga P., Barik, Niranjan
    Physica A 523 (2019) 852
    Cornell University
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    Title: Non-Extensive Statistics in Free-Electron Metals and Thermal Effective Mass
    Author: Khuntia, Arvind; Sahu, Gayatri; Sahoo, Raghunath; Mahapatra, Durga P.; Barik, Niranjan
    Subject: Condensed Matter - Statistical Mechanics
    Description: We have applied the non-extensive statistical mechanics to free electrons in several metals to calculate the electronic specific heat at low temperature. In this case, the Fermi-Dirac (FD) function is modified from its Boltzmann-Gibbs (BG) form, with the exponential part going to a $q$-exponential, in its non-extensive form. In most cases, the non-extensive parameter, $q$, is found to be greater than unity to produce the correct thermal effective mass, $m^*$, of electrons. The ratio $m^*/m$ is found to show a nice systematic dependence on $q$. Results indicate, electrons in metals, in the presence of long range correlations are reasonably well described by Tsallis statistics. Comment: Final Published version
    Is part of: Physica A 523 (2019) 852
    Identifier: 1809.08096 (ARXIV ID)

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    \(\phi\) Meson As a Probe of QCD Equation of State

    Sahoo, Raghunath, Nayak, Tapan, Kabana, Sonia, Nandi, Basanta, Mahapatra, Durga
    arXiv.org, Aug 21, 2009
    © ProQuest LLC All rights reserved, Engineering Database, Publicly Available Content Database, ProQuest Engineering Collection, ProQuest Technology Collection, ProQuest SciTech Collection, Materials Science & Engineering Database, ProQuest Central (new), ProQuest Central Korea, SciTech Premium Collection, Technology Collection, ProQuest Central Essentials, ProQuest One Academic, Engineering Collection (ProQuest)
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    Title: \(\phi\) Meson As a Probe of QCD Equation of State
    Author: Sahoo, Raghunath; Nayak, Tapan; Kabana, Sonia; Nandi, Basanta; Mahapatra, Durga
    Contributor: Mahapatra, Durga (pacrepositoryorg)
    Subject: Phase Transitions ; Quarks ; Flux Density ; Equations of State ; Phase Transitions
    Description: In this work, we extract the QCD Equation of State (EoS) using experimental results of the \(\phi\) meson produced in nuclear collisions at AGS, SPS and RHIC energies. The data are confronted to simple thermodynamic expectations and lattice results. The experimental data indicate a first order phase transition, with a mixed phase stretching energy density between \(\sim\) 1 and 3.2 GeV/\(fm^3\).
    Is part of: arXiv.org, Aug 21, 2009
    Identifier: 2331-8422 (E-ISSN)

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    Non-Extensive Statistics in Free-Electron Metals and Thermal Effective Mass

    Khuntia, Arvind, Sahu, Gayatri, Sahoo, Raghunath, Mahapatra, Durga, Barik, Niranjan
    arXiv.org, Apr 8, 2019 [Peer Reviewed Journal]
    © ProQuest LLC All rights reserved, Engineering Database, Publicly Available Content Database, ProQuest Engineering Collection, ProQuest Technology Collection, ProQuest SciTech Collection, Materials Science & Engineering Database, ProQuest Central (new), ProQuest Central Korea, SciTech Premium Collection, Technology Collection, ProQuest Central Essentials, ProQuest One Academic, Engineering Collection (ProQuest)
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    Title: Non-Extensive Statistics in Free-Electron Metals and Thermal Effective Mass
    Author: Khuntia, Arvind; Sahu, Gayatri; Sahoo, Raghunath; Mahapatra, Durga; Barik, Niranjan
    Contributor: Barik, Niranjan (pacrepositoryorg)
    Subject: Free Electrons ; Mathematical Analysis ; Dependence ; Statistical Mechanics
    Description: We have applied the non-extensive statistical mechanics to free electrons in several metals to calculate the electronic specific heat at low temperature. In this case, the Fermi-Dirac (FD) function is modified from its Boltzmann-Gibbs (BG) form, with the exponential part going to a \(q\)-exponential, in its non-extensive form. In most cases, the non-extensive parameter, \(q\), is found to be greater than unity to produce the correct thermal effective mass, \(m^*\), of electrons. The ratio \(m^*/m\) is found to show a nice systematic dependence on \(q\). Results indicate, electrons in metals, in the presence of long range correlations are reasonably well described by Tsallis statistics.
    Is part of: arXiv.org, Apr 8, 2019
    Identifier: 2331-8422 (E-ISSN); 10.1016/j.physa.2019.02.043 (DOI)

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    $\phi$ Meson As a Probe of QCD Equation of State

    Sahoo, Raghunath, Nayak, Tapan K., Alam, Jan-E, Kabana, Sonia, Nandi, Basanta K., Mahapatra, Durga P.
    Acta Phys. Polon. B Proc.Suppl. 2 (2009) 359
    Cornell University
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    Title: $\phi$ Meson As a Probe of QCD Equation of State
    Author: Sahoo, Raghunath; Nayak, Tapan K.; Alam, Jan-E; Kabana, Sonia; Nandi, Basanta K.; Mahapatra, Durga P.
    Subject: High Energy Physics - Phenomenology ; Nuclear Experiment ; Nuclear Theory
    Description: In this work, we extract the QCD Equation of State (EoS) using experimental results of the $\phi$ meson produced in nuclear collisions at AGS, SPS and RHIC energies. The data are confronted to simple thermodynamic expectations and lattice results. The experimental data indicate a first order phase transition, with a mixed phase stretching energy density between $\sim$ 1 and 3.2 GeV/$fm^3$. Comment: 9 pages, 8 figures, Excited QCD 2009, Zakopane (Poland). To appear in Acta Physica Plonica B
    Is part of: Acta Phys. Polon. B Proc.Suppl. 2 (2009) 359
    Identifier: 0908.3080 (ARXIV ID)

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    Enhanced UV Light emission from Silicon nanoparticles induced by Au ion implantation

    Singh, Akhilesh, Grycznski, Karol, Rout, Bibhu, Li, Jianyou, Mcdaniel, Floyd, Neogi, Arup, Sahu, Gayatri, Mahapatra, Durga
    arXiv.org, Nov 2, 2008
    © ProQuest LLC All rights reserved, Engineering Database, Publicly Available Content Database, ProQuest Engineering Collection, ProQuest Technology Collection, ProQuest SciTech Collection, Materials Science & Engineering Database, ProQuest Central (new), ProQuest Central Korea, SciTech Premium Collection, Technology Collection, ProQuest Central Essentials, ProQuest One Academic, Engineering Collection (ProQuest)
    Available
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    Title: Enhanced UV Light emission from Silicon nanoparticles induced by Au ion implantation
    Author: Singh, Akhilesh; Grycznski, Karol; Rout, Bibhu; Li, Jianyou; Mcdaniel, Floyd; Neogi, Arup; Sahu, Gayatri; Mahapatra, Durga
    Contributor: Mahapatra, Durga (pacrepositoryorg)
    Subject: Ion Implantation
    Description: Study of light emitting silicon fabricated by ion implantation.
    Is part of: arXiv.org, Nov 2, 2008
    Identifier: 2331-8422 (E-ISSN)

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    Enhanced UV Light emission from Silicon nanoparticles induced by Au ion implantation

    Singh, Akhilesh, Grycznski, Karol G., Rout, Bibhu, Li, Jianyou, Mcdaniel, Floyd, Neogi, Arup, Sahu, Gayatri, Mahapatra, Durga P.
    Cornell University
    Available
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    Title: Enhanced UV Light emission from Silicon nanoparticles induced by Au ion implantation
    Author: Singh, Akhilesh; Grycznski, Karol G.; Rout, Bibhu; Li, Jianyou; Mcdaniel, Floyd; Neogi, Arup; Sahu, Gayatri; Mahapatra, Durga P.
    Subject: Condensed Matter - Materials Science
    Description: Study of light emitting silicon fabricated by ion implantation. Comment: G-COE Conference - Kyoto 2008 abstract
    Identifier: 0811.0122 (ARXIV ID)