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Search Results: 1 - 10 of 190357 matches for " Narayana G "
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G. P. Kalmath,M. Narayana Swamy
Wayamba Journal of Animal Science , 2012,
Abstract: Animal manure is one of the major underutilized resources in many countries. Animal manure mainly refers to excreta (dung) and urine along with the bedding material mixed with soil. Animal manure is available either in dairies, slaughterhouses or at the backyards of the houses (Mukund and Chavan, 2007). Along with other animal wastes and agro-industrial wastes, animal manure is creating environmental problems like, dispensing foul odors, occupying vast areas, ground and surface water pollution etc. The manure generated by animal production is currently receiving a great deal of attention in the water quality arena. Adoption of better animal waste management practices can reduce the transport of nutrients and pathogens from animal farms to ground and surface water, which could improve the water quality.
Tuning Optical Properties of Graphene Oxide under Compressive Strain Using Wet Ball Milling Method  [PDF]
M. Venkat Narayana, S. Narayana Jammalamadaka
Graphene (Graphene) , 2016, DOI: 10.4236/graphene.2016.52008
Abstract: We report on the effect of compressive stress on the optical properties of graphene oxide using a wet ball milling technique. For this purpose, graphene oxide was prepared using the modified Hummer’s method and subsequently processed with wet ball milling. X-ray diffraction infers a peak at 9.655°?which is the allowed reflection for the graphene oxide. The Williamson-Hall method is used to quantify the strain on the 10 hrs and 20 hrs ball milled graphene oxide samples and is found to be 4.2% and 4.8% respectively. Although we applied strain on the graphene oxide, it actually helped to reduce the defects which are confirmed by the intensity drop-off of D-peak in Raman spectroscopy. Indeed there exists a band gap alteration of 0.14 eV for an applied compressive strain of ~4.8%, hinting that the reduction in oxygen functional groups and the same is confirmed with the Fourier Transform Infrared Spectroscopy (FTIR). The present results would be helpful in developing graphene oxide based flexible memories and optoelectronic devices.
Room temperature soft ferromagnetism in the nanocrystalline form of YCo2 - a well-known bulk Pauli paramagnet
S. Narayana Jammalamadaka,E. V. Sampathkumaran,V. Satya Narayana Murthy,G. Markandeyulu
Physics , 2008, DOI: 10.1063/1.2929380
Abstract: The Laves phase compound, YCo2, is a well-known exchange-enahnced Pauli paramagnet. We report here that, in the nanocrystalline form, this compound interestingly is an itinerant ferromagnet at room temperature with a low coercive-field. The magnitude of the saturation moment (about 1 Bohr-magneton per formula unit) is large enough to infer that the ferromagnetism is not a surface phenomenon in these nanocrystallites. Since these ferromagnetic nanocrystallines are easy to synthesize with a stable form in air, one can explore applications, particularly where hysteresis is a disadvantage.
Plasmacytoma of tonsil diagnosed by fine-needle aspiration cytology
Bhat Ramachandra,Prathima K,Harendra Kumar M,Narayana G
Journal of Cytology , 2010,
Abstract: Extramedullary plasmacytoma of tonsil is rare. Even though biopsy is necessary for final diagnosis, fine-needle aspiration cytology (FNAC) can provide useful information in the management of such cases. We report a case of plasmacytoma of tonsil diagnosed by FNAC in a 43-year-old man who presented with a swelling in the right tonsillar area. FNAC smears revealed sheets of plasma cells at various stages of maturation. Subsequent histopathological and immunohistochemical studies confirmed the diagnosis of plasmacytoma. This case is reported for the rarity of site for extramedullary plasmacytoma and to highlight the usefulness of FNAC in lesions of tonsil.
Seed Germination inhibition test for pregnancy detection in Malnad Gidda Cows
M. Narayana Swamy,C. Ravikumar and G. P. Kalmath
Veterinary World , 2010,
Abstract: In the present study, the seed germination inhibition technique was applied to diagnose pregnancy in Malnad Gidda cattle breed, a dwarf breed found in coastal and neighboring heavy rainfall areas in Karnataka. The urine samples collected from six inseminated Malnad Gidda cows at two months of post insemination served as positive group and the urine from six non inseminated Malnad Gidda cows served as negative group. In both the cases, the urine was diluted at the ratio of 1:4 with distilled water. In each sterile Petri dish fifteen wheat seeds were taken on the blotting paper and 15 ml of diluted urine was added. For each cow the test was conducted with a replica of six tests in six Petri dishes. Control test was also carried out with the addition of water only to the wheat seeds. The Petri dishes were covered with the trays to avoid evaporation. After three days, the seeds were examined for germination inhibition percentage in positive, negative and control groups, wherein the mean germination inhibition percentage was 73.65 ± 2.81, 27.90 ± 2.56 and 21.48 ± 2.69, respectively. The mean shoot length of the germinated wheat seeds on fifth day was 0.95 ± 0.47, 3.62 ± 0.51 and 5.54 ± 0.68 cm in positive, negative and control groups, respectively. Mean germination inhibition percent and reduced shoot length in positive group of Malnad Gidda cattle was indicative of pregnancy state. It was concluded that the seed germination inhibition technique is useful to detect pregnancy in Malnad Gidda cattle as a simple, non-invasive and economical method. [Vet. World 2010; 3(3.000): 107-108]
P.V. Satya Narayana,G. Ramireddy,S. Venkataramana
International Journal of Automotive and Mechanical Engineering , 2011,
Abstract: Heat and mass transfer along a vertical porous plate under the combined buoyancy force effects of thermal and species diffusion is investigated in the presence of a transversely applied uniform magnetic field and the Hall currents are taken into account. The governing fundamental equations on the assumption of a small magnetic Reynolds number are approximated by a system of non-linear ordinary differential equations, which are integrated by fourth-order Runge–Kutta method. Velocity, temperature and concentration are shown on graphs. The numerical values of the local shear stress, the local Nusselt number Nu and the local Sherwood number Sh are entered in tables. The effects of the magnetic parameter, Hall parameter and the relative buoyancy force effect between species and thermal diffusion on the velocity, temperature and concentration are discussed. The results are compared with those known from the literature.
A Novel Benchmark K-Means Clustering on Continuous Data
K. Prasanna,M. Sankara Prasanna Kumar,G. Surya Narayana
International Journal on Computer Science and Engineering , 2011,
Abstract: Cluster analysis is one of the prominent techniques in the field of data mining and k-means is one of the most well known popular and partitioned based clustering algorithms. K-means clusteringalgorithm is widely used in clustering. The performance of k-means algorithm will affect when clustering the continuous data. In this paper, a novel approach for performing k-means clustering on continuous data is proposed. It organizes all the continuous data sets in a sorted structure such that one can find all the data sets which are closest to a given centroid efficiently. The key institution behind this approach is calculating the distance from origin to each data point in the data set. The data sets are portioned into k-equal number of cluster with initial centroids and these are updated all at a time with closest one according to newlycalculated distances from the data set. The experimental results demonstrate that proposed approach can improves the computational speed of the direct k-means algorithm in the total number of distance calculations and the overall time of computations particularly in handling continuous data.
Marigold: a diagnostic tool for BGM forecasting and management in chickpea
Suresh Pande,G Krishna Kishore,J Narayana Rao
Journal of SAT Agricultural Research , 2005,
In silico evidence of signaling pathways of notch mediated networks in leukemia
Kaiser Jamil,Archana Jayaraman,Raghunatha Rao,Surya Narayana G. Raju
Computational and Structural Biotechnology Journal , 2012,
Abstract: Notch signaling plays a critical role in cell fate determination and maintenance of progenitors in many developmental systems. Notch receptors have been shown to be expressed on hematopoietic progenitor cells as well as to various degrees in peripheral blood T and B lymphocytes, monocytes, and neutrophils. Our aim was to understand the protein interaction network, using Notch1 protein name as query in STRING database and we generated a model to assess the significance of Notch1 associated proteins in Acute Lymphoblastic Leukemia (ALL). We further analyzed the expression levels of the genes encoding hub proteins, using Oncomine database, to determine their significance in leukemogenesis. Of the forty two hub genes, we observed that sixteen genes were underexpressed and eleven genes were overexpressed in T-cell Acute Lymphoblastic samples in comparison to their expression levels in normal cells. Of these, we found three novel genes which have not been reported earlier- KAT2B, PSEN1 (underexpressed) and CDH2 (overexpressed).These three identified genes may provide new insights into the abnormal hematopoietic process observed in Leukemia as these genes are involved in Notch signaling and cell adhesion processes. It is evident that experimental validation of the protein interactors in leukemic cells could help in the identification of new diagnostic markers for leukemia.
First results from the CAWSES-India Tidal Campaign
S. Gurubaran, D. Narayana Rao, G. Ramkumar, T. K. Ramkumar, G. Dutta,B. V. Krishna Murthy
Annales Geophysicae (ANGEO) , 2008,
Abstract: The first CAWSES-India Tidal Campaign was conducted by the Indian scientific community during March–April 2006. The objectives of this campaign were: (1) To determine the characteristics of tides in the troposphere and lower stratosphere (0–20 km) and mesosphere and lower thermosphere (MLT) region (80–100 km), (2) to explore and identify what lower atmospheric processes drive middle atmospheric tides in the Indian continental region and (3) to provide information on those short-term variabilities of MLT tides that are likely to have an impact on the ionospheric variabilities and contribute to the upper atmospheric weather. Data sets from experiments conducted at the three low latitude radar sites, namely, Trivandrum (8.5° N, 76.9° E), Tirunelveli (8.7° N, 77.8° E) and Gadanki (13.5° N, 79.2° E) and fortnightly rocket launches from Thumba were made use of in this study. An important observational finding reported in this work is that the radar observations at Tirunelveli/Trivandrum indicate the presence of 15–20 day modulation of diurnal tide activity at MLT heights during the February–March period. A similar variation in the OLR fields in the western Pacific (120–160° longitude region) suggests a possible link between the observed tidal variabilities and the variations in the deep tropical convection through the nonmigrating tides it generates.
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