Maharshi Dayanand Saraswati University
Ajmer, India

Maharshi Dayanand Saraswati University is a university in Ajmer, Rajasthan, India. It opened in 1987 and is named after the philosopher Maharshi Dayananda Saraswati. Wikipedia.

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Charan P.D.,Maharaja Ganga Singh University | Sharma K.C.,Maharshi Dayanand Saraswati University
Indian Journal of Environmental Protection | Year: 2017

The present investigation was made to assess the effect of top 3 widely used organophosphate pesticides on cauliflower and cabbage crops grown in Ajmer. The selection of the vegetables was based on the area of cultivation and the scale of production. The range of residues of different organophosphate pesticides was found in the order of malathion > dimethoate > monocrotophos. Comparative assessment of the low dose (2 ppm) and high dose (5 ppm) of each selected pesticides was studied on both vegetables grown in the greenhouse and compared with the controlled crop of each vegetable, which was not treated with any dose of these pesticides. Results of the investigation revealed that the average concentrations of different phyto-chemical parameters including starch, lipids, protein, carotenoids, chlorophyll-a, chlorophyll-b, etc., in selected vegetables were decreased on increasing the level of concentration of various pesticides. © 2017 - Kalpana Corporation.

Parwani L.,Maharshi Dayanand Saraswati University | Sharma V.,Maharshi Dayanand Saraswati University | Ganguli J.,Banasthali University
Indian Journal of Experimental Biology | Year: 2013

Acacia arabica and Moringa oleifera are credited with a number of medicinal properties. Traditionally gum of Acacia plant is used in the treatment of skin disorders to soothe skin rashes, soreness, inflammation and burns while Moringa seed extracts are known to have antibacterial activity. In the present study the potential of the polymeric component of aqueous extracts of gum acacia (GA) and the seeds of M. oleifera (MSP) in wound management was evaluated. The results revealed that both biopolymers were hemostatic and hasten blood coagulation. They showed shortening of activated partial thromboplastin time and prothrombin time and were non-cytotoxic in nature. Both showed antibacterial activity against organisms known to be involved in wound infections with MIC ranging from 500-600 μg mL-1 for GA and 300-700 μg mL-1 for MSP. They were biodegradable and exhibited water absorption capacity in the range of 415 to 935%. The hemostatic character coupled to these properties envisions their potential in preparation of dressings for bleeding and profusely exuding wounds. The biopolymers have been further analysed for their composition by Gas chromatography.

Bhatnagar A.,Maharshi Dayanand Saraswati University | Chinnasamy S.,University of Georgia | Singh M.,University of Georgia | Das K.C.,University of Georgia
Applied Energy | Year: 2011

This study evaluated mixotrophic growth potential of native microalgae in media supplemented with different organic carbon substrates and wastewaters. Three robust mixotrophic microalgae viz. Chlamydomonas globosa, Chlorella minutissima and Scenedesmus bijuga were isolated after long-term enrichments from industrial wastewater. The mixotrophic growth of these microalgae resulted in 3-10 times more biomass production relative to phototrophy. Glucose, sucrose and acetate supported significant mixotrophic growth. Poultry litter extract (PLE) as growth medium recorded up to 180% more biomass growth compared to standard growth medium BG11, while treated and untreated carpet industry wastewaters also supported higher biomass, compared to BG11 growth with no significant effect of additional nitrogen supplementation. Supplementing treated wastewater and PLE with glucose and nitrogen resulted in 2-7 times increase in biomass relative to the unamended wastewaters or PLE. The consortia of Chlamydomonas-Chlorella and Scenedesmus-Chlorella were the best for PLE and untreated wastewater respectively, while a combination all three strains was suitable for both PLE and wastewater. These algae can be good candidates for biofuel feedstock generation as they would not require freshwater or fertilizers. Such mixotrophic algal consortia offer great promise for production of renewable biomass for bioenergy applications using wastewaters. © 2010.

Bhatnagar A.,University of Georgia | Bhatnagar M.,Maharshi Dayanand Saraswati University | Chinnasamy S.,University of Georgia | Das K.C.,University of Georgia
Applied Biochemistry and Biotechnology | Year: 2010

It is imperative to slash the cost of algal oil to less than $50 bbL -1 for successful algal biofuel production. Use of municipal wastewater for algal cultivation could obviate the need for freshwater and the nutrients - N and P. It would also add CO2 through bacterial activity. Chlorella minutissima Fott et Nova dominated the entire phycoflora year around and through each stage of the wastewater treatment at the oxidation pond system of Wazirabad (Delhi) in India. The ability to grow so profusely in such varied and contrasting situations made this alga unique. Besides pollution tolerance, it grew heterotrophically in dark under acidic conditions and as a mixotroph in presence of light over a range of organic C substrates. It could utilize both ammoniacal and nitrate nitrogen, survived anaerobicity, 5% NaCl and ?10 bar of osmotic stress. C. minutissima grew at pH 4-11 and raised the pH set initially by 1 to 3 units in 7.5 h. It showed gigantism and largely kept afloat in presence of utilizable organic carbon, while flocculated in mineral medium and on aging. The alga also possessed potential for biofuel production. The studied parameters indicate why C. minutissima was a potential biomass builder in municipal sewage and could be used to determine which other alga(e) may serve the purpose. © Humana Press 2009.

The inhibitive action of leaves (LV), Latex (LX) and Fruit (FT) extracts of Calotrpis procera and Calotropis gigantea on mild steel corrosion in HCl, H2SO4 and mixture of solutions have been studied using mass loss and thermometric technique at different temperatures. The results indicate that the ethanolic extracts functioned as a good corrosion inhibitor in both environments and inhibition efficiency increased with extracts concentration. A mechanism of chemical adsorption of the plants components on the surface of the metal is proposed for the inhibition behavior. The inhibition efficiency increases up to 86.37%. © 2016, Pleiades Publishing, Ltd.

Bajia S.C.,Maharshi Dayanand Saraswati University
Synthesis and Reactivity in Inorganic, Metal-Organic and Nano-Metal Chemistry | Year: 2011

Tris(O,O'-ditolyl/dibenzyl/diphenyldithiophosphato)cobalt(III) complexes (1-5) were synthesized by the reaction of CoCl2·6H 2O and NH4S2P(OR)2. Initially, the bis(O,O'-ditolyl/dibenzyl/diphenyldithiophosphato)cobalt(II) complexes were formed, oxidized to their analogous tris complexes. In this study, oxidation rate of individual dithiophosphate ligand were investigated on the basis of physical changes. Cobalt(III) complexes (1-5) were characterized by elemental analyses, conductivity measurement, TGA/DSC, and spectroscopic techniques (infrared [IR], ultraviolet [UV]-visible, 1H-, 13C-, and 31P-NMR, mass). The experimental results suggest that these complexes have distorted octahedral geometry with bidentate chelation dithiophosphate moieties. Molecular weight determinations of these complexes indicate their monomeric nature. Copyright © Taylor &Francis Group, LLC.

Mehra R.,Maharshi Dayanand Saraswati University | Malav B.B.,Maharshi Dayanand Saraswati University
Physics and Chemistry of Liquids | Year: 2012

Sound speed, density and viscosity of glycine in aqueous galactose solution at varying concentrations from 0.1035 to 1.0345 m at 298, 308 and 318 K have been determined. Density, viscosity and sound speed have been measured by using pre-calibrated bicapillary pycnometer, Ostwald's viscometer and single-frequency ultrasonic interferometer at 2 MHz frequency, respectively. The derived acoustic parameters like free volume (V f), adiabatic compressibility (β), hydration number (n H) and Gibbs free energy for activation (ΔG) acoustic impedance (Z), intermolecular free length (L f) and relative association (R A), internal pressure (π i), Rao's constant (R), Wada's constant (W) have been calculated from experimental data. All the measurements have been carried out in a thermostatic water bath having PT-100 sensor with circulating medium with an accuracy of ± 0.1°C. Solute-solvent interactions dominate over solute-solute interactions and, the solute-solvent interactions increase with temperature. © 2012 Copyright Taylor and Francis Group, LLC.

Mehra R.,Maharshi Dayanand Saraswati University | Yadav P.,Maharshi Dayanand Saraswati University
Physics and Chemistry of Liquids | Year: 2012

Volumetric, viscometric and ultrasonic studies of uracil in an aqueous urea solution in varying concentration of 2, 3 and 5 M have been carried out at 298, 308 and 318 K. The uracil concentration in the aqueous urea solution varies from 0.05% to 0.4%. Density (ρ), viscosity (η) and sound speed (u) have been measured. The experimental data are used for computing various thermodynamic and acoustic parameters, namely apparent molar volume, isentropic compressibility, apparent isentropic compressibility, relative association, intermolecular free length, acoustic impedance, viscous relaxation time, hydration number, Gibb's free energy, classical absorption coefficient of the solution and viscosity data have been further analysed in the light of Masson's equation and Jones-Dole's equations, respectively. The results have been discussed in terms of solute-solute and solute-solvent interaction and the structural changes of the solutes in solutions. The effect of variation of temperature on these interactions has also been investigated. © 2012 Copyright Taylor and Francis Group, LLC.

Chinnasamy S.,University of Georgia | Bhatnagar A.,University of Georgia | Bhatnagar A.,Maharshi Dayanand Saraswati University | Claxton R.,University of Georgia | Das K.C.,University of Georgia
Bioresource Technology | Year: 2010

Improved wastewater management with beneficial utilization will result in enhanced sustainability and enormous cost savings in industries. Algae cultivation systems viz. raceway ponds, vertical tank reactors (VTR) and polybags were evaluated for mass production of algal consortium using carpet industry (CI) untreated wastewater. Overall areal biomass productivity of polybags (21.1 g m-2 d-1) was the best followed by VTR (8.1 g m-2 d-1) and raceways (5.9 g m-2 d-1). An estimated biomass productivity of 51 and 77 tons ha-1 year-1 can be achieved using 20 and 30 L capacity polybags, respectively with triple row arrangement. Biomass obtained from algal consortium was rich in proteins (~53.8%) and low in carbohydrates (~15.7%) and lipids (~5.3%). Consortium cultivated in polybags has the potential to produce 12,128 m3 of biomethane ha-1 year-1. To be economically viable, the capital expenditure for polybag reactors needs to be reduced to $10 m-2 for bioenergy/biofuel production.

Chinnasamy S.,University of Georgia | Bhatnagar A.,University of Georgia | Bhatnagar A.,Maharshi Dayanand Saraswati University | Hunt R.W.,University of Georgia | Das K.C.,University of Georgia
Bioresource Technology | Year: 2010

Industrial and municipal wastewaters are potential resources for production of microalgae biofuels. Dalton - the Carpet Capital of the World generates 100-115 million L of wastewater d-1. A study was conducted using a wastewater containing 85-90% carpet industry effluents with 10-15% municipal sewage, to evaluate the feasibility of algal biomass and biodiesel production. Native algal strains were isolated from carpet wastewater. Preliminary growth studies indicated both fresh water and marine algae showed good growth in wastewaters. A consortium of 15 native algal isolates showed >96% nutrient removal in treated wastewater. Biomass production potential and lipid content of this consortium cultivated in treated wastewater were ∼9.2-17.8 tons ha-1 year-1 and 6.82%, respectively. About 63.9% of algal oil obtained from the consortium could be converted into biodiesel. However further studies on anaerobic digestion and thermochemical liquefaction are required to make this consortium approach economically viable for producing algae biofuels.

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