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Search Results: 1 - 10 of 132094 matches for " Naresh Babu V. Sepuri "
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Mitochondrial Lysyl-tRNA Synthetase Independent Import of tRNA Lysine into Yeast Mitochondria
Naresh Babu V. Sepuri, Madhavi Gorla, Michael P. King
PLOS ONE , 2012, DOI: 10.1371/journal.pone.0035321
Abstract: Aminoacyl tRNA synthetases play a central role in protein synthesis by charging tRNAs with amino acids. Yeast mitochondrial lysyl tRNA synthetase (Msk1), in addition to the aminoacylation of mitochondrial tRNA, also functions as a chaperone to facilitate the import of cytosolic lysyl tRNA. In this report, we show that human mitochondrial Kars (lysyl tRNA synthetase) can complement the growth defect associated with the loss of yeast Msk1 and can additionally facilitate the in vitro import of tRNA into mitochondria. Surprisingly, the import of lysyl tRNA can occur independent of Msk1 in vivo. This suggests that an alternative mechanism is present for the import of lysyl tRNA in yeast.
Power flow analysis of a power system in the presence of interline power flow controller (IPFC)
A. V. Naresh Babu,S. Sivanagaraju,Ch. Padmanabharaju,T. Ramana
Journal of Engineering and Applied Sciences , 2010,
Abstract: One of the latest generation flexible AC transmission systems (FACTS) controllers is interline power flow controller (IPFC). In general, it is connected in multiple transmission lines of a power system network. This paper presents power injection model (PIM) of IPFC. This model is incorporated in Newton-Raphson (NR) power flow algorithm to study the effect of IPFC parameters in power flow analysis. A program in MATLAB has been written in order to extend conventional NR algorithm based on this model. Numerical results are carried out on a standard 2 machine 5 bus system to demonstrate the performance of the IPFC model.
Fusion of Multi-Scale Visible and Thermal Images using EMD for Improved Face Recognition
Vaidehi. V,Ramya. R,PrasannaDevi. M,Naresh Babu N T
Lecture Notes in Engineering and Computer Science , 2011,
Isolation, characterization and differentiation potential of rat bone marrow stromal cells
Polisetti Naresh,Chaitanya V,Babu Phanithi,Vemuganti Geeta
Neurology India , 2010,
Abstract: Background: Bone marrow mesenchymal cells have been identified as a source of pluripotent stem cells with varying degrees of plasticity in humans. However, there are a few reports on rat-derived cells, which could be good models for the research purpose. We describe here a simple method of establishing the rat bone marrow stromal cells by the principle of adhesion and document their phenotype along with their differentiation potential to other lineages. Materials and Methods: Rat bone marrow stromal cells were isolated by three methods: direct plastic adherence, ficoll hypaque separation and a combination of both. The stromal cells obtained by these methods were characterized by fluorescent activating cell sorting (FACS) for established hematopoietic and non-hematopoietic markers. The cells obtained by combination method (combination of ficoll density gradient centrifugation and plastic adherence) were cultured and serially passaged. Transcriptional confirmation was done by reverse transcription polymerase chain reaction (RT-PCR) for vimentin and collagen type 1 alpha 1. Attempts were made to differentiate the marrow stromal cells into adipocytes, osteocytes and neuronal like cells. Results: Bone marrow samples from 10 rats yielded 4-5 million bone marrow mononuclear cells /ml per femur. Of the three methods tested, a combination method yielded good growth of spindle cells. The cells obtained by combined method showed high percentage of positivity for vimentin, fibronectin and CD90 and negative for hematopoietic markers. Further, RT-PCR confirmed vimentin and collagen type - 1 alpha 1 expression. Oil red O staining and Alizarin red staining confirmed adipocytic and osteogenic differentiation. On immunocytochemical analysis, the cells expressed nestin, β-tubulin III, neurofilament and synaptophysin. Conclusion: Adequate quantities of rat marrow stromal cell cultures can be established by a simple method based on adhesion properties. Their phenotypic characteristics and plasticity support the evidence that they are mesenchymal stem cells with a distinct tendency for neural lineage.
Multi-Algorithmic Face Authentication System
Vaidehi V,Teena Mary Treesa,Naresh Babu N T,Annis Fathima A
Lecture Notes in Engineering and Computer Science , 2011,
Photoluminescence and Energy Transfer Process in Bi3+/Sm3+ Co-Doped Phosphate Zinc Lithium Glasses  [PDF]
Chandragiri Parthasaradhi Reddy, Varnakavi Naresh, Ballipalli Chandra Babu, Srinivasa Buddhudu
Advances in Materials Physics and Chemistry (AMPC) , 2014, DOI: 10.4236/ampc.2014.49019
Abstract: Present paper reports on luminescence characteristics of individually doped Bi3+: PZL, Sm3+: PZL and co-doped (Bi3+/Sm3+): PZL (50P2O5-30ZnO-20LiF) glasses prepared by a melt quenching method. The results revealed that Bi3+: PZL glass exhibited a broad emission peak at 440 nm (3P11S0) under excitation wavelength 300 nm (1S03P1). Sm3+: PZL doped glass has shown a prominent orange emission at 601 nm (4G5/26H7/2) with an excitation wavelength 403 nm (6H5/24F7/2). Later on Bi3+ is added to Sm3+: PZL glass by increasing its concentrations from 0.1 - 1.5 mol%. By co-doping Bi3+ to Sm3+: PZL glass, Sm3+ emission intensity has been considerably enhanced till 1.0 mol% due to energy transfer from Bi3+ to Sm3+ and when its concentration exceeds this critical value (1.0 mol%) there has been a drastic decrease in Sm3+ emission which is explained accordingly from photoluminescence spectra, energy level diagram and lifetime measurements.
PDBToSDF: Create ligand structure files from PDB file
Naresh Babu Muppalaneni,Allam Appa Rao
Bioinformation , 2011,
Abstract: Protein Data Bank (PDB) file contains atomic data for protein and ligand in protein-ligand complexes. Structure data file (SDF) contains data for atoms, bonds, connectivity and coordinates of molecule for ligands. We describe PDBToSDF as a tool to separate the ligand data from pdb file for the calculation of ligand properties like molecular weight, number of hydrogen bond acceptors, hydrogen bond receptors easily.
Translaminar facetal screw (magerl′s) fixation
Rajasekaran S,Naresh-Babu J
Neurology India , 2005,
Abstract: Translaminar facet screw fixation (TLFS) achieves stabilization of the vertebral motion segment by screws inserted at the base of the spinous process, through the opposite lamina, traversing the facet joint, and ending in the base of the transverse process. It is simple, does not require any specialized equipment, and has the advantages of being a procedure of lesser magnitude, lesser operative time, less cost and few complication rate. Recently there is growing interest in this technique to augment the anterior lumbar fusions to achieve global fusion less invasively. In this review article, we discuss the clinical and biomechanical considerations, surgical technique, indications, contraindications and recent developments of TLFS fixation in lumbar spine fusion.
International Journal of Engineering Science and Technology , 2010,
Abstract: Content-based image retrieval (CBIR) is an important research area for manipulating large amount of image databases and archives. Extraction of invariant features is the basis of CBIR. This paper focuses on the problem of texture, color& shape feature extractions. Using just one feature information for comparing images may cause inaccuracy than compared with using more than one features. Therefore many image retrieval system use many feature information like color, shape and other features. We use HSI color information especially Huevalue and CSS (Curvature Scale Space) as shape information. From a large image data base, an automatic shape & color Based retrivel technique can Significantly retrival task Using Just two feature information for comparing image May cause inaccuracy than compared with using more than two features Accuracy high .We are Using three features for image Retrieval like color, shape & texture Feature ,We use HIS color information especially HUE Value and CSS(curvature scale space) as shape information. As a Result Three Features combine fulfill the aspect of Retrieval in Image.
Experimental Investigations and Theoretical Modeling Aspects in Column Studies for Removal of Cr(VI) from Aqueous Solutions Using Activated Tamarind Seeds  [PDF]
Suresh Gupta, B. V. Babu
Journal of Water Resource and Protection (JWARP) , 2010, DOI: 10.4236/jwarp.2010.28081
Abstract: Continuous adsorption experiments are conducted using fixed-bed adsorption column to evaluate the performance of the adsorbent developed (from activated tamarind seeds) for the removal of Cr(VI) from aqueous solutions and the results obtained are validated with a model developed in this study. The effects of significant parameters such as flow rate, mass of adsorbent, and initial Cr(VI) concentration are studied and breakthrough curves are obtained. As the flow rate increases from 10 to 20 mL min-1, the breakthrough time decreases from 210 to 80 min. As the mass of adsorbent increases, breakthrough time gets delayed. The breakthrough times are obtained as 110, 115 and 210 min for 15, 20 and 25 g of activated tamarind seeds. As the initial Cr(VI) concentration increases from 100 to 200 mgL-1, the break point time decreases from 210 to 45 min. The process parameters for fixed-bed adsorption such as breakthrough time, total percentage removal of Cr(VI), adsorption exhaustion rate and fraction of unused bed length are calculated and the performance of fixed-bed adsorption column is analyzed. The mechanism for Cr(VI) adsorption on activated tamarind seeds is proposed. At low value of solution pH (= 1), the increase in Cr(VI) adsorption is due to the electrostatic attraction between positively charged groups of activated tamarind seeds and the HCrO4-. A mathematical model for fixed-bed adsorption column is proposed by incorporating the effect of velocity variation along the bed length in the existing model. Pore and surface diffusion models are used to describe the intra-particle mechanism for Cr(VI) adsorption. The breakthrough curve obtained theoretically from pore diffusion model and surface diffusion model are compared with experimental results for different operating conditions. The standard deviation values obtained for pore diffusion model and solid diffusion model are 0.111 and 0.214 respectively.
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