1,446 research outputs found

    Interaction of Mycobiont: Piriformospora Indica with Medicinal plants and plants of Economic importance

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    Traditional medicines of plant origin are used by world’s large population. Economic development including eradication of poverty in developing countries like, India or other countries of the world required increase in agricultural productivity. Bio fertilizers plays a very important role in modern agriculture, in achieving higher productions in Agriculture at lower input costs using biotechnological innovations at large. An endophytic symbiotic fungus, Piriformospora indica isolated from desert soils of Rajasthan, India promotes growth as well as important ingredients of the medicinal as well as economically important plants by forming association with roots of various plants and it has been established as biofertilizer, bioprotector, immunoregulator and agent for biological hardening of tissue culture raised plants. P. indica tremendously improves the growth and overall biomass production of adiverse host including legumes, medicinal and economically important plants. Pronounced growth promotional effect was seen with terrestrial orchids. P. indica was able to colonize the rhizoids of liverwort and the thalli failed to grow under in situ conditions in the absence of this fungus. The fungus also provided protection when inoculated into the tissue culture raised plants by overcoming the ‘transient transplant shock’ on transfer to the field and renders almost 100% survival on transplant. P. indica cell biomass which has potential for promoting growth of many plants (above 145) has been documented so far which include plants such as Centella asiatica, Coriandrum sativum, Artimisia annua, Spilanthus calva, Arabidopsis thalina, Cajanus cajan, Arachis hypogea, Mimosa pudica, Cicer arietinum, Allium cepa, Hordeum vulgare, Zea mays, Saccharum officinarum, Withania somnifera, Solanum lysopersicum, etc. However, impact of P. indica culture filtrate on plant growth promotion has been studied only in few plants. Important medicinal plants and plants of economic importance on which effect of culture filtrate of P. indica has been studied include plants such as Z. mays, Bacopa monniera, Nicotiana tabaccum, Azadiracta indica, Aristolochia elegans, Helianthus annus and Solanum melongena. P. indica, a root colonizing fungus which is cultivable axenically, uniquely possesses multifunctional properties such as plant promoter, plant protector, resistance against heavy metals, bio herbicide, immune-modulator, resistance against temperature, salt and stress tolerance as bio fertilizer and tool for basic research. There are prospects that ingredients present in culture filtrate, that are stimulated and produced in response to ingredients of culture filtrate in plants, will be identified in future completely thereby opening more avenues of applications of P. indica. Many more properties and functions of P. indica cells and culture filtrate are expected to be known in future.Keywords: Helianthus annus, Piriformospora indica, seed oil content, culture filtrate, aristolochia, plant microbe interactio

    Dielectric Anisotropy in Partially Grain-Oriented Bi 2

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    Ceramics obtained from quenching melts of prereacted polycrystalline Bi2V5.5 exhibit grain orientation (~ 55%). Microstructural studies carried out using scanning electron microscopy (SEM) on subsequently annealed ceramics show ferroelectric domains. These post-annealed ceramics possess dielectric anisotropies of about 1:1.2 at 300 K and 1:4.3 in the vicinity of the Curie temperature (~ 730 K) between the directions parallel and perpendicular to the quenching direction. The dielectric constants of the samples, obtained by quenching the melts, are higher than that of the post-annealed ceramics. Electrically poled and thermally cycled samples of both as-quenched and post-annealed exhibit ferroelectric hysteresis loops at 300 K

    Heat and Mass Transfer in MHD Micropolar Fluid in The Presence of Diffusion Thermo and Chemical Reaction

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    This work is devoted to investigating the influence of diffusion thermo effect on hydromagnetic heat and mass transfer oscillatory flow of a micropolar fluid over an infinite moving vertical permeable plate in a saturated porous medium in the presence of transverse magnetic field and chemical reaction. The dimensionless equations are solved analytically using perturbation technique. The effects of the various fluid flow parameters entering into the problem on the velocity, microrotation, temperature and concentration fields within the boundary layer are discussed with the help of graphs. Also the local skin-friction coefficient, the wall couple stress coefficient, and the rates of heat and mass transfer coefficients are derived and shown in graphs. Comparison of the obtained numerical results is made with existing literature and is found to be in good agreement

    Chemical Reaction and Radiation Effects on the Hydro-Magnetic Free Convection Flow of Visco-Elastic Fluid along an Infinite Vertical Porous Plate in a Porous Medium

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    An unsteady hydro magnetic laminar free convection heat and mass transfer flow of a visco-elastic, dissipative fluid along an infinite vertical Porous plate through porous medium is analyzed in the presence of chemical reaction and thermal radiation.  The solution of the problem is obtained in the form of power series of  which is very small. Analytical expressions for the velocity, temperature and concentration fields are given, as well as for the skin friction, the rate of heat transfer and the rate of mass transfer coefficient at the plate.  The influence.......

    Charge separation relative to the reaction plane in Pb-Pb collisions at sNN=2.76\sqrt{s_{\rm NN}}= 2.76 TeV

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    Measurements of charge dependent azimuthal correlations with the ALICE detector at the LHC are reported for Pb-Pb collisions at sNN=2.76\sqrt{s_{\rm NN}} = 2.76 TeV. Two- and three-particle charge-dependent azimuthal correlations in the pseudo-rapidity range η<0.8|\eta| < 0.8 are presented as a function of the collision centrality, particle separation in pseudo-rapidity, and transverse momentum. A clear signal compatible with a charge-dependent separation relative to the reaction plane is observed, which shows little or no collision energy dependence when compared to measurements at RHIC energies. This provides a new insight for understanding the nature of the charge dependent azimuthal correlations observed at RHIC and LHC energies.Comment: 12 pages, 3 captioned figures, authors from page 2 to 6, published version, figures at http://aliceinfo.cern.ch/ArtSubmission/node/286

    A note on comonotonicity and positivity of the control components of decoupled quadratic FBSDE

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    In this small note we are concerned with the solution of Forward-Backward Stochastic Differential Equations (FBSDE) with drivers that grow quadratically in the control component (quadratic growth FBSDE or qgFBSDE). The main theorem is a comparison result that allows comparing componentwise the signs of the control processes of two different qgFBSDE. As a byproduct one obtains conditions that allow establishing the positivity of the control process.Comment: accepted for publicatio

    First narrow-band search for continuous gravitational waves from known pulsars in advanced detector data

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    Spinning neutron stars asymmetric with respect to their rotation axis are potential sources of continuous gravitational waves for ground-based interferometric detectors. In the case of known pulsars a fully coherent search, based on matched filtering, which uses the position and rotational parameters obtained from electromagnetic observations, can be carried out. Matched filtering maximizes the signalto- noise (SNR) ratio, but a large sensitivity loss is expected in case of even a very small mismatch between the assumed and the true signal parameters. For this reason, narrow-band analysis methods have been developed, allowing a fully coherent search for gravitational waves from known pulsars over a fraction of a hertz and several spin-down values. In this paper we describe a narrow-band search of 11 pulsars using data from Advanced LIGO’s first observing run. Although we have found several initial outliers, further studies show no significant evidence for the presence of a gravitational wave signal. Finally, we have placed upper limits on the signal strain amplitude lower than the spin-down limit for 5 of the 11 targets over the bands searched; in the case of J1813-1749 the spin-down limit has been beaten for the first time. For an additional 3 targets, the median upper limit across the search bands is below the spin-down limit. This is the most sensitive narrow-band search for continuous gravitational waves carried out so far

    Multiplicity dependence of jet-like two-particle correlations in p-Pb collisions at sNN\sqrt{s_{NN}} = 5.02 TeV

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    Two-particle angular correlations between unidentified charged trigger and associated particles are measured by the ALICE detector in p-Pb collisions at a nucleon-nucleon centre-of-mass energy of 5.02 TeV. The transverse-momentum range 0.7 <pT,assoc<pT,trig< < p_{\rm{T}, assoc} < p_{\rm{T}, trig} < 5.0 GeV/cc is examined, to include correlations induced by jets originating from low momen\-tum-transfer scatterings (minijets). The correlations expressed as associated yield per trigger particle are obtained in the pseudorapidity range η<0.9|\eta|<0.9. The near-side long-range pseudorapidity correlations observed in high-multiplicity p-Pb collisions are subtracted from both near-side short-range and away-side correlations in order to remove the non-jet-like components. The yields in the jet-like peaks are found to be invariant with event multiplicity with the exception of events with low multiplicity. This invariance is consistent with the particles being produced via the incoherent fragmentation of multiple parton--parton scatterings, while the yield related to the previously observed ridge structures is not jet-related. The number of uncorrelated sources of particle production is found to increase linearly with multiplicity, suggesting no saturation of the number of multi-parton interactions even in the highest multiplicity p-Pb collisions. Further, the number scales in the intermediate multiplicity region with the number of binary nucleon-nucleon collisions estimated with a Glauber Monte-Carlo simulation.Comment: 23 pages, 6 captioned figures, 1 table, authors from page 17, published version, figures at http://aliceinfo.cern.ch/ArtSubmission/node/161

    Transverse sphericity of primary charged particles in minimum bias proton-proton collisions at s=0.9\sqrt{s}=0.9, 2.76 and 7 TeV

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    Measurements of the sphericity of primary charged particles in minimum bias proton--proton collisions at s=0.9\sqrt{s}=0.9, 2.76 and 7 TeV with the ALICE detector at the LHC are presented. The observable is linearized to be collinear safe and is measured in the plane perpendicular to the beam direction using primary charged tracks with pT0.5p_{\rm T}\geq0.5 GeV/c in η0.8|\eta|\leq0.8. The mean sphericity as a function of the charged particle multiplicity at mid-rapidity (NchN_{\rm ch}) is reported for events with different pTp_{\rm T} scales ("soft" and "hard") defined by the transverse momentum of the leading particle. In addition, the mean charged particle transverse momentum versus multiplicity is presented for the different event classes, and the sphericity distributions in bins of multiplicity are presented. The data are compared with calculations of standard Monte Carlo event generators. The transverse sphericity is found to grow with multiplicity at all collision energies, with a steeper rise at low NchN_{\rm ch}, whereas the event generators show the opposite tendency. The combined study of the sphericity and the mean pTp_{\rm T} with multiplicity indicates that most of the tested event generators produce events with higher multiplicity by generating more back-to-back jets resulting in decreased sphericity (and isotropy). The PYTHIA6 generator with tune PERUGIA-2011 exhibits a noticeable improvement in describing the data, compared to the other tested generators.Comment: 21 pages, 9 captioned figures, 3 tables, authors from page 16, published version, figures from http://aliceinfo.cern.ch/ArtSubmission/node/308
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