916 research outputs found

    Constraining f(T,B,TG,BG)f(T,B,T_G,B_G) gravity by dynamical system analysis

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    The evolutionary behavior of the Universe has been analysed through the dynamical system analysis in f(T,B,TG,BG)f(T,B,T_G,B_G) gravity, where TT, BB, TGT_G, and BGB_G respectively represent torsion, boundary term, teleparallel Gauss-Bonnet term and Gauss-Bonnet boundary term. We use the transformation, f(T,B,TG,BG)=−T+F(T,B,TG,BG)f(T,B,T_G,B_G)=-T+\mathcal{F}(T, B, T_G, B_G) in order to obtain the deviation from the Teleparallel Equivalent of General Relativity (TEGR). Two cosmological models pertaining to the functional form of F(T,B,TG,BG)\mathcal{F}(T, B, T_G, B_G) have been studied. The well motivated forms are: (i) F(T,B,TG,BG)=f0TmBnTGk\mathcal{F}(T, B, T_G, B_G) = f_{0} T^{m} B^{n}T_{G}^{k} and (ii) F(T,B,TG,BG)=b0B+g0TGk\mathcal{F}(T, B, T_G, B_G)=b_{0} B + g_{0} T_{G}^{k} . The evolutionary phases of the Universe have been identified through the detailed analysis of the critical points. Further, with the eigenvalues and phase space diagrams, the stability and attractor nature of the accelerating solution have been explored. The evolution plots have been analyzed for the corresponding cosmology and compatibility with the present observed value of standard density parameters have been shown.Comment: 17 pages, 4 figures, 6 tables. Constructive comments are welcom

    Studies on protein profile of Ascardia galli and its host Gallus gallus domesticus

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    The present investigation deals with the protein content in nematode parasite Ascardia galli and its host tissue i.e. normal and infected intestinal tissue of Gallus gallus domesticus. The result obtained an amount of protein content in the present study indicates that the amount of proteins present in nematode parasites is low as compared to protein present in infected intestine as well as in normal intestine.&nbsp

    Effect of fillers and fire retardant compounds on hydroxy terminated polybutadiene based insulators

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    A series of polyurethane compositions have been formulated using hydroxy-terminated polybutadiene as polymeric binder and carbon black as a major filler. Various binder-to-filler ratios of the formulations were evaluated to get calendered sheets. The formulations have been characterised for pot-life and rollability and the calendered sheets for mechanical and thermal properties, bUm rate, glass transition temperature, shore hardness and density . The different fillers tried were varieties of carbon black as a major filler; metal oxides, silicates and organic compounds; and fire retardants, such as zinc borate, sodium metaborate, ammonium dihydrogen phosphate and antimony trioxide. The structure and morphology of the fillers have been correlated with the properties. The optimised composition has been evaluated in an end-burning motor, as an insulator for case-bonded application, using a typical composite propellant. The results of interface bonding between the propellant and the insulator have also been presented

    Noether Symmetries in f(T,TG)f(T,T_G) Cosmology

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    All degrees of freedom related to the torsion scalar can be explored by analysing, the f(T,TG)f(T,T_G) gravity formalism where, TT is a torsion scalar and TGT_G is the teleparallel counterpart of the Gauss-Bonnet topological invariant term. The well-known Noether symmetry approach is a useful tool for selecting models that are motivated at a fundamental level and determining the exact solution to a given Lagrangian, hence we explore Noether symmetry approach in f(T,TG)f(T,T_G) gravity formalism with three different forms of f(T,TG)f(T,T_G) and study how to establish nontrivial Noether vector form for each one of them. We extend the analysis made in \cite{capozziello2016noether} for the form f(T,TG)=b0TGk+t0Tmf(T,T_{G})=b_{0}T_{G}^{k}+t_{0}T^{m} and discussed the symmetry for this model with linear teleparallel equivalent of the Gauss-Bonnet term, followed by the study of two models containing exponential form of the teleparallel equivalent of the Gauss-Bonnet term. We have shown that all three cases will allow us to obtain non-trivial Noether vector which will play an important role to obtain the exact solutions for the cosmological equations.Comment: 12 page

    A specific colour inhibiter gene in rice

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    A new quality wheat for Bombay

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    THE ACCELERATED STABILITY STUDY OF CONSTALAX CHURNA- AN AYURVEDIC FORMULATION

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    Constalax churna, greenish brown powder with characteristic odor and bitter salty taste was evaluated for its stability, as per ICH guidelines Q1A (R2) at accelerated conditions (Temperature: 40 °C ± 2, Relative Humidity : 75% ± 5). The real time stability is estimated at temperature: 25 °C ± 2 &relative humidity 60% ± 5.The study sample was observed for changes in different parameters like physico-chemical, organoleptic and microbial load for 6 month under accelerated conditions and for real time stability study observed for one year. Real time stability was comparatively estimated to evaluate actual degradation rate of Constalax Churna with respect to accelerated conditions. Up to six months of storage at accelerated condition, no change was observed in organoleptic parameters like colour, odour and taste of Constalax Churna. Changes in of different physico-chemical parameters were taken into account to evaluate intercept and slope. Extrapolated shelf life of Constalax Churna was calculated with 10% degradation rate from physico-chemical parameters at accelerated condition 40 °C ± 2 and 75% ± 5 RH. The present evaluation supports that the Constalax Churna was appropriate at accelerated condition up to 6 month storage. From this accelerated stability study it could be extrapolated that shelf life of Constalax Churna is 25.42 months (2.11years) for climatic zone I & II countries. Real time stability data of Constalax Churna showed very good stability up to 2 years

    ESTIMATION OF TOTAL PHENOL IN SOME MEDICINAL PLANTS OF MARATHWADA REGION IN MAHARASHTRA

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    An  attempt  has  been  made  here  to  investigate  occurrence  of  total  phenol in  the leaves , bark  and  wood   of  Butea monosperma ­Lam, Madhuca  indica Gmel,  Mimusops elengi Linn and Syzygium cumini Linn. are medicinally important plants of Marathwada region in Maharashtra. Comparative  account  of  total  phenol  content  of  leaves ,bark and wood of  four  species  revealed  that , Madhuca  indica were  rich  ( range 2.156  to 4.410  mg / g dry wt. )  than Butea monosperma (range 1.987 to 4.138 mg / g dry wt.) ­, Mimusops elengi (range 2.601 to 3.438 mg / g dry wt.)  and Syzygium cumini (range 1.621 to 3.330  mg / g dry wt. )  in all seasons. Key words:  Total Phenol, Medicinal Plants, Marathwada region

    Accelerating Cosmological Models in f(T,B)f(T, B) Gravitational Theory

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    In this paper, we have explored the field equations of f(T, B) gravity as an extension of teleparallel gravity in an isotropic and homogeneous space time. In the basic formalism developed, the dynamical parameters are derived by incorporating the power law and exponential scale factor function. The models are showing accelerating behaviour and approaches to Λ\LambdaCDM at late time.The present value of the equation of state parameter for both the cases are obtained to be in accordance with the range provided by cosmological observations. The geometrical parameters and the scalar field reconstruction are performed to assess the viability of a late time accelerating Universe. Further the stability of both the models are presented. It has been observed that both the models are parameters dependent. Since most of the geometrically modified theories of gravity are favouring the violation of strong energy condition, we have derived the energy conditions both for the power law and exponential model. In both the models, the violation of strong energy condition established.Comment: 14 Pages, 9 figure

    An inhibitor for petiolate condition in Nicotiana tabacum L.

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