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Thiruvananthapuram, India

Mamatha P.,Andhra University | Salamma S.,Andhra University | Swamy A.V.N.,JNTUACEP | Ravi Prasad Rao B.,Andhra University
Der Pharma Chemica | Year: 2014

Heavy metals are important environmental pollutants and their accumulation in green edibles poses significant impact on human health, when they cross admissible limits. The present study investigated the levels of five different heavy metals (Cadmium, Chromium, Lead, Nickel and Zinc) in six commonly used leafy vegetables (Bladder dock, Drumstick, Fenugreek, Kenaf, Mint and Spinach) collected in and around Pulivendula town of YSR Kadapa District, Andhra Pradesh. The results revealed that the all the leafy vegetables are contaminated by accumulating heavy metals and the concentrations of Cadmium and Lead has been crossed the safe limit and hence found hazardous to human health in the study area. Source


Reddy C.M.,VITS | Reddy B.R.B.,KSRMCE | Reddy E.K.,JNTUA | Maheswaramma K.S.,JNTUACEP
2011 International Conference on Nanoscience, Technology and Societal Implications, NSTSI11 | Year: 2011

Biomaterials engineered at the nano level play a significant role in human health care, in particular bone - related therapy, because of their unique functional properties. In this work we explained bone grafting, bone healing, Preparation of hydoxy apatite (HA) and finite element model for bone grafting and simulation. Finite Element Model (FEM) is useful for surgery and reduces failures. The main aim of this study is to provide a patient specific model where the surgical gestures were considered and to evaluate its relevance as a predictive tool. © 2011 IEEE. Source


Visali N.,JNTUACEP | Reddy M.S.,Vaagdevi Institute of Technology and Science | Reddy M.S.K.,JNTUACEP
2014 International Conference on Advances in Electrical Engineering, ICAEE 2014 | Year: 2014

In present days with increasing in load demand and with large interconnection of various networks it is essential to operate generating stations optimally within its constraints. Otherwise the price for the cost of generation increases. So it is very much essential to reduce the cost of generation. The cost of generation mainly includes running cost of generation ie., fuel cost with respect to thermal & nuclear power stations. Also the major economic factor in power system planning, operation and control is with the cost of generating real power. In this paper, the main objective is to minimize the cost of real power generation by optimal allocation of generating units to load demand subjected to equality and inequality constraints. The optimum generation scheduling plays an extremely important role in optimal operation of power system. To obtain economic scheduling, a method is proposed based on lambda iterative approach using Differential Evolution programming. The Economic Dispatch (ED) is to minimize the operating fuel cost while satisfying the load demand and operational constraints. The analysis is carried out with inclusion of transmission losses and the results are presented. The proposed method is tested with two sample systems by considering various load demands. The numerical results have shown the performance and applicability of the proposed method. Also the results obtained by the proposed method are compared with the existing methods. © 2014 IEEE. Source


Mamatha P.,JNTUACEP | Venkateswarlu G.,National Center for Compositional Characterisation of Materials | Swamy A.V.N.,JNTUACEP | Sahayam A.C.,National Center for Compositional Characterisation of Materials
Analytical Methods | Year: 2014

An analytical methodology has been developed for the speciation of Cr(iii) and Cr(vi) in soil/sediments. The species of interest were extracted from samples using a solution containing 0.1 M EDTA, 1% tetrabutyl ammonium bromide (TBAB) and a little HF in a domestic microwave oven. The conditions for the quantitative extraction of the Cr species from sediments were optimized. The separation of anionic Cr(vi) from the sediment extract was carried out using the sulfate form of Dowex-1 at pH 4.5. Though the extract contained the anionic EDTA complex of Cr(iii), it was quantitatively eluted. The adsorbed Cr(vi) was eluted with 2 M HNO3. The determination of the separated Cr(vi) and Cr(iii) in the effluent, and total Cr in the extract was carried out using ICP-OES. The recovery of the total Cr from the original samples was 96-99% and that of Cr(iii) and Cr(vi) spiked was 97-102% with an RSD in the range of 5-6%. A developed methodology has been applied for the speciation of Cr in a certified reference material stream sediment (GBW-07312) and also four real world samples: two sediments collected from the Hussain Sagar lake, Hyderabad, India and two soils collected near the Uranium Corporation of India Limited (UCIL), Tummalapalli, Kadapa, India. The total concentration of Cr in the extract was in good agreement with the certified value of the stream sediment and with the complete dissolution method in case of the real world samples. The limit of detection of Cr(vi) was 0.02 mg L-1, which corresponding to a detection limit of 5.0 mg kg-1 for this method. © The Royal Society of Chemistry 2014. Source


Visali N.,JNTUACEP | Visali N.,Vaagdevi Institute of Technology and Science | Reddy S.,JNTUACEP | Reddy S.,Vaagdevi Institute of Technology and Science | And 2 more authors.
Journal of Electrical Engineering | Year: 2014

In present days with increasing in load demand and with large interconnection of various networks it is essential to operate generating stations optimally within its constraints. Otherwise the price for the cost of generation increases. So it is very much essential to reduce the cost of generation. The cost of generation mainly includes running cost of generation ie., fuel cost with respect to thermal &nuclear power stations. Also the major economic factor in power system planning, operation and control is with the cost of generating real power. In this paper, the main objective is to minimize the cost of real power generation by optimal allocation of generating units to load demand subjected to equality and inequality constraints. The optimum generation scheduling plays an extremely important role in optimal operation of power system. To obtain economic scheduling, a method is proposed based on lambda iterative approach using Differential Evolution programming. The Economic Dispatch (ED) is to minimize the operating fuel cost while satisfying the load demand and operational constraints. The analysis is carried out with inclusion of transmission losses and the results are presented. The proposed method is tested with two sample systems by considering various load demands. The numerical results have shown the performance and applicability of the proposed method. Also the results obtained by the proposed method are compared with the existing methods. Source

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