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Search Results: 1 - 10 of 219566 matches for " C Thilagavathi "
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Genetic variability, heritability and genetic advance of quantitative traits in black gram by effects of mutation in field trail
D Arulbalachandran, L Mullainathan, S Velu, C Thilagavathi
African Journal of Biotechnology , 2010,
Abstract: Genetic variation has led to an increase in the quantitative traits of crops. The variability on genome is induced by mutation, which enhances the productivity. We evaluated variability on quantitative characters such as, plant height, number of branches/plant, number of leaves/plant, number of fruit clusters/plant, number of pods/plant, number of seeds/pod, yield/plant and 100 seed weight of black gram in M2 generation by the effect of mutation by gamma rays. The results were shown high genetic variability, heritability and genetic advance with significant enhancement (P 0.05 and P 0.01) in growth and yield traits. Hence selection is effective for these traits could be possible through gamma rays. The speculation of effects of gamma rays on genome is that irradiation, induced addition, deletion in DNA pairs and also attributed large chromosomal rearrangement. The result were shown significant enhancement in yield and related traits. It indicates that improvement in quantitative traits would be possible through gamma rays.
b-Chromatic Number of M[Cn],M[Pn],M[F1,n] and M[Wn]  [PDF]
Duraisamy Vijayalakshmi, Kandasamy Thilagavathi, Narayanan Roopesh
Open Journal of Discrete Mathematics (OJDM) , 2011, DOI: 10.4236/ojdm.2011.12010
Abstract: In this paper, we discuss about the b-colouring and b-chromatic number for middle graph of Cycle, Path, Fan graph and Wheel graph denoted as M[Cn],M[Pn],M[F1,n] and M[Wn] .
A study on groundwater geochemistry and water quality in layered aquifers system of Pondicherry region, southeast India
R. Thilagavathi,S. Chidambaram,M. V. Prasanna,C. Thivya,C. Singaraja
Applied Water Science , 2012, DOI: 10.1007/s13201-012-0045-2
Abstract: Geochemical signatures of groundwater in the Pondicherry region, south India, were determined. The coastal aquifers are fragile and this situation becomes more intense in layered aquifer systems like that of the Pondicherry region. In this region, groundwater occurs in alluvium, Lower Cuddalore, Upper Cuddalore, Tertiary, Cretaceous and mixed aquifers. The geochemical signature of groundwater in these formations was studied by collecting 93 groundwater samples. The collected samples from specific formations were analysed for physical parameters, such as electrical conductivity (EC), pH and major ion concentrations, such as Ca, Mg, Na, K, Cl, HCO3, PO4 and SO4. The results of the analysis were interpreted with geology; the ionic concentrations in the groundwater vary spatially and temporally. The abundance of these ions are in the following order: Na > Ca > Mg > K = Cl > HCO3 > SO4. Interpretation of analytical data shows that Ca–Na and Cl–SO4–HCO3 is the dominant facies in all the formations. Groundwater in the area is generally hard and fresh-brackish in most of the formations and brackish in nature in alluvium formation. The sodium absorption ratio shows that most of the samples are grouped under excellent category to good category in all the formations. The residual sodium carbonate also are in good category in all the formations. Chloro-alkaline indices reveal that the majority of samples show negative values in all the litho units indicating the exchange of Na and K in groundwater with Mg or Ca in rock. Scholler classification of water indicates that longer residence time of water with more prominent base exchange. High EC and TDS values in certain locations of alluvial, Upper Cuddalore and Cretaceous formations prove to be unsuitable for drinking and irrigation purposes.
Effectiveness and efficiency of chemical mutagens in cowpea (Vigna unguiculata (L.) Walp)
D Dhanavel, P Pavadai, L Mullainathan, D Mohana, G Raju, M Girija, C Thilagavathi
African Journal of Biotechnology , 2008,
Abstract: A study was undertaken in a cowpea (Vigna unguiculata (L.) Walp.) variety CO 6 to assess the efficiency and effectiveness of chemical mutagens; ethyl methane sulphonate (EMS), diethyl sulphate (DES) and sodium azide (SA). EMS treatments were found highly effective than the other chemicals. Mutagenic effectiveness and efficiency decreased with increase in all mutagenic treatments.
Study at a molecular level of the transfer process of a anionic, cationic and non-ionic surfactants from water to β-cyclodextrin
D. Geetha,T. Thilagavathi1,P.S. Ramesh,C. Rakkappan
Journal of Engineering and Applied Sciences , 2009,
Abstract: Density and sound velocity data for aqueous solutions at 303K containing Sodium dodecyl benzene sulfonate (SDBS), Cetyl trimethyl ammonium bromide (CTAB) and Tween 20 in the absence and presence of β-Cyclodextrin were analyzed to calculate the apparent molar volume and adiabatic compressibilities. For the binary systems Фv and Фk values of the pure surfactants in water have been obtained as a function of the concentration. For the ternary systems, remarkable increases of both the molar volume and compressibility of the surfactant at infinite dilution with respect to the value in water is observed. The positive molar compressibility of the surfactant, when it is forming the complex, compared to the negative value in pure water, proves the hydrophobic components of the interaction. Both molar volumes and compressibility of the surfactants are the same in the absence and in the presence of β-CD at high surfactant concentrations, indicating the non participation of the complex into the micelles and the CMCs are displaced. Using FTIR spectroscopy, the complexation of β-CD at high with anionic, cationic and non-ionic surfactants.
Nano ZnO structures synthesized in presence of anionic and cationic surfactant under hydrothermal process
T. Thilagavathi,D. Geetha
Applied Nanoscience , 2013, DOI: 10.1007/s13204-012-0183-8
Abstract: Uniform ZnO nano structures are synthesized in the presence of anionic surfactant, sodium dodecyl benzene sulfonate (SDBS) and cationic surfactant, cetyl tri methyl ammonium bromide (CTAB) at 100 °C using NaOH as the reactant. The particle size, morphology and structure of the nano ZnO particles are collected by X-ray diffraction, scanning electron microscopy (SEM) and Fourier transform infrared (FT-IR) spectra. Rod and cone shaped ZnO nano structure is observed. It may vary in morphology from pure ZnO structure due to the presence of surfactants. The results show that there is an extrinsic relation between the morphology of the samples. Based on the relation, we proposed that there might be two kinds of interactions between SDBS and CTAB with ZnO particles, i.e., inter- and intra-interactions.
Automatic Docking System with Recharging and Battery Replacement for Surveillance Robot
M. Meena,P. Thilagavathi
International Journal of Electronics and Computer Science Engineering , 2012,
Abstract: Most of the applications like industrial automation, home automation, hospitals, space exploration, military, etc, the surveillance robot are widely used. For that, continuous functioning of surveillance robot is necessary. In this paper, the development of automatic docking system with recharging and battery replacement process for surveillance robot is proposed. The robot can return to the docking station for recharging operations when the battery is low. The charging duration of the battery mounted in the robot is an important issue. To overcome this problem, battery replacement is a perfect solution. The battery is automatically exchanged within 30 seconds. So the robot needs not to be turned off for long duration of time while replacing the battery.
Subclasses of starlike functions associated with a fractional calculus operator involving Caputo's fractional differentiation
Gangaharan Murugu Sundaramoorthy,K. Thilagavathi
Le Matematiche , 2011,
Abstract: In this paper, we introduce a new class of functions which are analytic and univalent with negative coefficients defined by using certain fractional operators descibed in the Caputo sense and obtain coefficient estimates, extreme points, the radii of close to convexity, starlikeness and convexity and neighbourhood results for functions in this new class. In particular, we obtain modified Hadamard product results for the function f(z) belongs to the new class in the unit disc.
A Survey on Dynamic Job Scheduling in Grid Environment Based on Heuristic Algorithms
D. Thilagavathi,Antony Selvadoss Thanamani
Computer Science , 2014,
Abstract: Computational Grids are a new trend in distributed computing systems. They allow the sharing of geographically distributed resources in an efficient way, extending the boundaries of what we perceive as distributed computing. Various sciences can benefit from the use of grids to solve CPU-intensive problems, creating potential benefits to the entire society. Job scheduling is an integrated part of parallel and distributed computing. It allows selecting correct match of resource for a particular job and thus increases the job throughput and utilization of resources. Job should be scheduled in an automatic way to make the system more reliable, accessible and less sensitive to subsystem failures. This paper provides a survey on various heuristic algorithms, used for scheduling in grid.
Development of Textile Laminates for Improved Cut Resistance
G. Thilagavathi,K. Rajendrakumar,T. Kannaian
Journal of Engineered Fibers and Fabrics , 2010,
Abstract: Mechanical properties of fibres viz. tensile modulus, tenacity, elongation are the key performance indicators of cut resistance besides yarn and fabric structure. p-aramid and UHDPE (Ultra High Density Polyethylene) based high performance fibres are most commonly used for protection against mechanical risks. Specially engineered composite yarns and fabrics would help enhance cut resistance. This paper discusses on the influence textile structure configuration on the performance of cut resistant textiles. A three tier laminate composite was made using knitted Kevlar fabric (p-aramid) as outer surface, Polyurethane foam in the middle and a knitted nylon fabric as skin contact layer. This specially engineered laminate showed a 20% increase in cut resistance force when compared with the Kevlar fabric used for lamination. The combination of breathable PU foam and knitted structure of fabric yielded high stretch with improved breathability and dexterity.
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