1,811 research outputs found
Lekshmy Parameswaran, fundadora de Fuelfor
No full textLekshmy Parameswaran és cofundadora de Fuelfor, un consultoria especialitzada en el disseny i innovació en el sector sociosanitari. Llicenciada en enginyeria i especialitzada en disseny de producte, ha treballat més de 10 anys en diferents grups de recerca de Phillips Electronics com a dissenyadora i com a directora d'innovació del departament de "Philips Healthcare", investigant en noves estratègies d'innovació en disseny per aplicar en el camp sanitari. Va participar com a conferenciant al Fòrum de Tecnologies i Innovació, coorgantizat pel Parc de Recerca UAB i celebrat el passat 14 de novembre
Session 1 : Political and economic alternative paradigms : Network of rurban republics
No full textOn Day 1 (13 June 2018), in the session of “Political and Economic Alternative Paradigms”, M. P. PARAMESWARAN (Kerala Sastra Sahitya Parishad, India) delivered a lecture on Network of Rurban Republics.
The video is produced by Global University for Sustainability, 2018
Archaea and Bacteria Acclimate to High Total Ammonia in a Methanogenic Reactor Treating Swine Waste
No full textCitation: Esquivel-Elizondo, S., Parameswaran, P., Delgado, A. G., Maldonado, J., Rittmann, B. E., & Krajmalnik-Brown, R. (2016). Archaea and Bacteria Acclimate to High Total Ammonia in a Methanogenic Reactor Treating Swine Waste. Archaea-an International Microbiological Journal, 10. doi:10.1155/2016/4089684Inhibition by ammonium at concentrations above 1000mgN/L is known to harm the methanogenesis phase of anaerobic digestion. We anaerobically digested swine waste and achieved steady state COD-removal efficiency of around 52% with no fatty-acid or H-2 accumulation. As the anaerobic microbial community adapted to the gradual increase of total ammonia-N (NH3 -N) from 890 +/- 295 to 2040 +/- 30 mg/L, the Bacterial and Archaeal communities became less diverse. Phylotypes most closely related to hydrogenotrophic Methanoculleus (36.4%) and Methanobrevibacter (11.6%), along with acetoclastic Methanosaeta (29.3%), became the most abundant Archaeal sequences during acclimation. This was accompanied by a sharp increase in the relative abundances of phylotypes most closely related to acetogens and fatty-acid producers (Clostridium, Coprococcus, and Sphaerochaeta) and syntrophic fatty-acid Bacteria (Syntrophomonas, Clostridium, Clostridiaceae species, and Cloacamonaceae species) that have metabolic capabilities for butyrate and propionate fermentation, as well as for reverse acetogenesis. Our results provide evidence countering a prevailing theory that acetoclastic methanogens are selectively inhibited when the total ammonia-N concentration is greater than similar to 1000 mgN/L. Instead, acetoclastic and hydrogenotrophic methanogens coexisted in the presence of total ammonia-N of similar to 2000 mgN/L by establishing syntrophic relationships with fatty-acid fermenters, as well as homoacetogens able to carry out forward and reverse acetogenesis
Impact of Ammonium on Syntrophic Organohalide-Respiring and Fermenting Microbial Communities
No full textCitation: Delgado, A. G., Fajardo-Williams, D., Kegerreis, K. L., Parameswaran, P., & Krajmalnik-Brown, R. (2016). Impact of Ammonium on Syntrophic Organohalide-Respiring and Fermenting Microbial Communities. Msphere, 1(2), 10. doi:10.1128/mSphere.00053-16Syntrophic interactions between organohalide-respiring and fermentative microorganisms are critical for effective bioremediation of halogenated compounds. This work investigated the effect of ammonium concentration (up to 4 g liter(-1) NH4+-N) on trichloroethene-reducing Dehalococcoides mccartyi and Geobacteraceae in microbial communities fed lactate and methanol. We found that production of ethene by D. mccartyi occurred in mineral medium containing = 1 g liter(-1) NH4+-N, organohalide-respiring dynamics shifted from D. mccartyi and Geobacteraceae to mainly D. mccartyi. An increasing concentration of ammonium was coupled to lower metabolic rates, longer lag times, and lower gene abundances for all microbial processes studied. The methanol fermentation pathway to acetate and H-2 was conserved, regardless of the ammonium concentration provided. However, lactate fermentation shifted from propionic to acetogenic at concentrations of >= 2 g liter(-1) NH4+-N. Our study findings strongly support a tolerance of D. mccartyi to high ammonium concentrations, highlighting the feasibility of organohalide respiration in ammonium-contaminated subsurface environments. IMPORTANCE Contamination with ammonium and chlorinated solvents has been reported in numerous subsurface environments, and these chemicals bring significant challenges for in situ bioremediation. Dehalococcoides mccartyi is able to reduce the chlorinated solvent trichloroethene to the nontoxic end product ethene. Fermentative bacteria are of central importance for organohalide respiration and bioremediation to provide D. mccartyi with H2, their electron donor, acetate, their carbon source, and other micronutrients. In this study, we found that high concentrations of ammonium negatively correlated with rates of trichloroethene reductive dehalogenation and fermentation. However, detoxification of trichloroethene to nontoxic ethene occurred even at ammonium concentrations typical of those found in animal waste (up to >= 2 g liter(-1) NH4+-N). To date, hundreds of subsurface environments have been bioremediated through the unique metabolic capability of D. mccartyi. These findings extend our knowledge of D. mccartyi and provide insight for bioremediation of sites contaminated with chlorinated solvents and ammonium
Gandhian Marxism and local governance
No full textModerator: SIT Tsui Jade Margaret (Southwest University, China)
Speakers: M. P. PARAMESWARAN (All India Peoples Science Network, India) K K KRISHNA KUMAR (Kerala Sasthra Sahithya Parishad, India) Anita RAMPAL (University of Delhi, India) Manoranjan MOHANTY (Council for Social Development, India
Rapid declines in waterbirds in urban wetlands - A case study from Perur Lake, Coimbatore (Supplementary)
No full text<p>This is supplementary information for the scientific paper published in Indian Birds#. #Parameswaran, G., Sivashankar, R., & Vridhi, R. 2023. Rapid decline of waterbirds in urban wetlands: A case study from Perur-Sundakamuthur Lake, Coimbatore, Tamil Nadu, India. Indian BIRDS 19 (3): 67–74</p><p>An annotated checklist of the birds recorded in Perur-Sundakamuthur Lake, Coimbatore, Tamil Nadu, India, from May 2014 till April 2020 through 67 monthly counts.</p>
sj-pdf-1-orm-10.1177_10944281221098607 - Supplemental material for Using CATA and Machine Learning to Operationalize Old Constructs in New Ways: An Illustration Using U.S. Governors’ COVID-19 Press Briefings
No full textSupplemental material, sj-pdf-1-orm-10.1177_10944281221098607 for Using CATA and Machine Learning to Operationalize Old Constructs in New Ways: An Illustration Using U.S. Governors’ COVID-19 Press Briefings by Jason D. Marshall, Francis J. Yammarino, Srikanth Parameswaran and Minyoung Cheong in Organizational Research Methods</p
Comparison of two methods of processing induced sputum: Selected versus entire sputum (multiple letters)
No full textAdditive manufacturing of polymer-derived ceramics: Materials, technologies, properties and potential applications
No full textArtificially structured ceramic components with extraordinary properties are of immense demand in various industries. Additive manufacturing (AM) or 3D printing technologies are promising for the fabrication of ceramic components. However, printing of ceramics directly from their raw powders is a daunting task and requires multistep processing. Preceramic polymers (PCPs) offer an attractive pathway towards AM of preceramic structures featuring heterogeneous architectures and their direct conversion to polymer-derived ceramics (PDCs) - the corresponding ceramics. This review reports a detailed summary of recent research progress on the additive manufacturing of PCPs and the corresponding PDCs manufactured for different applications. The approaches towards the synthesis of various PCPs are discussed along with easily tunable chemical formulations that can be employed in AM processes. Further, the review discusses conventional PDC technology as well as AM technologies that can be employed with PCPs and the associated superiorities and drawbacks in comparison to powder-based ceramic 3D printing. Complex-shaped PDC structures and their properties and potential applications are also discussed. Overall, this review illustrates the AM capabilities of PCPs for cost-effective fabrication of advanced ceramics with high resolution, superior performance, lower environmental impact and new functionalities
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