982 research outputs found

    Users opinion about synthetic, bio- and nano-biopesticides

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    As authors, we would like to convey our sincere thanks to Department of Chemistry, Govt. V.Y.T. PG. Autonomous College, Durg, for their valuable technical support given in this project. We would like to express our earnest thanks Dr. Poonrathi (Chief Medical Officer in charge - Kodai Govt. Hospital), Dr. Tamilselvan (Junior doctor- Krishnagiri Govt. Medical Health Unit), Ms. N.V. Ratana (Department of Agriculture – Telangana), Dr. Thirupurasundari (Dietician – USA), Ms. Tan (Organic Activist – KL), and Ms. Krithika Lakshmi (HR – Advisor, KL) for their valuable comments, timely advice, and suggestions. We also would like to thank all participants for devoting their precious time by helping us in this survey. We would like to share our humble gratitude to Dr. R. Senthil Kumar, Assistant Professor, Department of Statistics, Madras Christian College (Autonomous), Chennai, for his timely help and advice for statistical evaluation. SACC is grateful to Fundaç ão para a Ciência e a Tecnologia (FCT), Portugal for Scientific Employment Stimulus-Institutional Call (CEEC-INST/00102/2018) and to the Associate Laboratory for Green Chemistry - LAQV financed by national funds from FCT/MCTES (UIDP/5006/2020). The study was conducted in accordance with the Declaration of Helsinki and approved by the Institutional Review Board (or Ethics Committee) of Govt. V. Y. T. PG Autonomous College, Durg (protocol code IEC/GVYTPGACI 19 /DURG. Date- 30/10/2021) for studies involving humans. Informed consent was obtained from all subjects involved in the study. Publisher Copyright: © 2023 The AuthorsWith a growing global population, the demand for food, clothing and shelter became crucial for sustaining life. Moreover, the COVID-19 pandemic/endemic, along with the threat of other endemics, posed significant challenges in ensuring the delivery of nutritionally rich food. To address this, the World Health Organization (WHO) recommended the ban of some highly toxic chemical pesticides. Excessive consumption and exposure to pesticides possibly contributed to a decline in the human immunity levels making our fight against the pandemics more difficult and challenging. During the lockdown COVID-19 crisis, we conducted a survey to gather insights from farm landers (FLs), garden lovers (GLs), domestic front users (DFUs) predominantly from India, but also from other regions worldwide. The survey aimed at better understanding the usage of pesticides, both chemicals (CPs), bio-pesticides (BPs) or both, and their global utilization. A statistical survey with seven rudimentary sections was designed to receive the inputs (elementary inputs, awareness and perception, pesticide utility, health, ecology, and alternatives for safer trials) with fairness and care. The data was statistically analyzed within each group of population, revealing significant variations within the groups. Our study indicated that FLs (44.7 %) predominantly used BPs, GLs (18.8 %) relied on CPs, while DFUs (100.0 %) used a combination of both without any specific intention. Correlation analysis, given by R (correlation coefficient) and p (probability of obtaining an equal or more extreme effect than the found considering the null hypothesis as true) values revealed the existence of a positive and significant relationship between the selected variables, such as level of education (LOE) and gender, with the adoption of new alternatives (2loglikelihood = 64.743, with χ2 = 128.4, degrees of freedom (df) = 24, p<*0.05, **0.01, and *** 0.001) through multinomial regression analysis, indicating the fitness of the model. Likewise, our study primarily focused on exploring the insights for the development of nano-biopesticides, as improved alternatives to the existing solutions.publishersversionpublishe

    High-spin spectroscopy in 207^{207}At: Evidence of a 29/2+^{+} isomeric state

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    Yrast and near-yrast states above the known 25/2+^{+} isomer in 207^{207}At are established for the first time. The level scheme is extended up to 47/2\hbar and 6.5 MeV with the addition of about 60 new γ\gamma-ray transitions. The half-life of the 25/2+^{+} isomer is revisited and a value of T1/2T_{1/2} = 107.5(9) ns is deduced. Evidence of a hitherto unobserved 29/2+^{+} isomer in 207^{207}At is presented. A systematic study of B(E3)B(E3) values for the transitions de-exciting the 29/2+^{+} isomer in the neighboring odd-AA At isotopes suggests a half-life in the 2-4 μ\mus range for this state in 207^{207}At. The experimental results are compared with large-scale shell-model calculations performed using the KHM3Y effective interaction in the ZZ = 50-126, NN = 82-184 model space and an overall good agreement is noted between the theory and the experiment. A qualitative comparison of the excited states and the isomers with analogous states in neighboring nuclei provides further insight into the structure of 207^{207}At.Comment: 15 pages, 13 figure

    Measurements of fiducial and differential cross sections for Higgs boson production in the diphoton decay channel at s√=8 TeV with ATLAS

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    Measurements of fiducial and differential cross sections are presented for Higgs boson production in proton-proton collisions at a centre-of-mass energy of s√=8 TeV. The analysis is performed in the H → γγ decay channel using 20.3 fb−1 of data recorded by the ATLAS experiment at the CERN Large Hadron Collider. The signal is extracted using a fit to the diphoton invariant mass spectrum assuming that the width of the resonance is much smaller than the experimental resolution. The signal yields are corrected for the effects of detector inefficiency and resolution. The pp → H → γγ fiducial cross section is measured to be 43.2 ±9.4(stat.) − 2.9 + 3.2 (syst.) ±1.2(lumi)fb for a Higgs boson of mass 125.4GeV decaying to two isolated photons that have transverse momentum greater than 35% and 25% of the diphoton invariant mass and each with absolute pseudorapidity less than 2.37. Four additional fiducial cross sections and two cross-section limits are presented in phase space regions that test the theoretical modelling of different Higgs boson production mechanisms, or are sensitive to physics beyond the Standard Model. Differential cross sections are also presented, as a function of variables related to the diphoton kinematics and the jet activity produced in the Higgs boson events. The observed spectra are statistically limited but broadly in line with the theoretical expectations

    Measurement of the production of a W boson in association with a charm quark in pp collisions at √s = 7 TeV with the ATLAS detector

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    The production of a W boson in association with a single charm quark is studied using 4.6 fb−1 of pp collision data at s√ = 7 TeV collected with the ATLAS detector at the Large Hadron Collider. In events in which a W boson decays to an electron or muon, the charm quark is tagged either by its semileptonic decay to a muon or by the presence of a charmed meson. The integrated and differential cross sections as a function of the pseudorapidity of the lepton from the W-boson decay are measured. Results are compared to the predictions of next-to-leading-order QCD calculations obtained from various parton distribution function parameterisations. The ratio of the strange-to-down sea-quark distributions is determined to be 0.96+0.26−0.30 at Q 2 = 1.9 GeV2, which supports the hypothesis of an SU(3)-symmetric composition of the light-quark sea. Additionally, the cross-section ratio σ(W + +c¯¯)/σ(W − + c) is compared to the predictions obtained using parton distribution function parameterisations with different assumptions about the s−s¯¯¯ quark asymmetry

    Measurement of χ c1 and χ c2 production with s√ = 7 TeV pp collisions at ATLAS

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    The prompt and non-prompt production cross-sections for the χ c1 and χ c2 charmonium states are measured in pp collisions at s√ = 7 TeV with the ATLAS detector at the LHC using 4.5 fb−1 of integrated luminosity. The χ c states are reconstructed through the radiative decay χ c → J/ψγ (with J/ψ → μ + μ −) where photons are reconstructed from γ → e + e − conversions. The production rate of the χ c2 state relative to the χ c1 state is measured for prompt and non-prompt χ c as a function of J/ψ transverse momentum. The prompt χ c cross-sections are combined with existing measurements of prompt J/ψ production to derive the fraction of prompt J/ψ produced in feed-down from χ c decays. The fractions of χ c1 and χ c2 produced in b-hadron decays are also measured

    Search for squarks and gluinos in events with isolated leptons, jets and missing transverse momentum at s√=8 TeV with the ATLAS detector

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    The results of a search for supersymmetry in final states containing at least one isolated lepton (electron or muon), jets and large missing transverse momentum with the ATLAS detector at the Large Hadron Collider are reported. The search is based on proton-proton collision data at a centre-of-mass energy s√=8 TeV collected in 2012, corresponding to an integrated luminosity of 20 fb−1. No significant excess above the Standard Model expectation is observed. Limits are set on supersymmetric particle masses for various supersymmetric models. Depending on the model, the search excludes gluino masses up to 1.32 TeV and squark masses up to 840 GeV. Limits are also set on the parameters of a minimal universal extra dimension model, excluding a compactification radius of 1/R c = 950 GeV for a cut-off scale times radius (ΛR c) of approximately 30

    Search for squarks and gluinos with the ATLAS detector in final states with jets and missing transverse momentum using √s=8 TeV proton-proton collision data

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    A search for squarks and gluinos in final states containing high-p T jets, missing transverse momentum and no electrons or muons is presented. The data were recorded in 2012 by the ATLAS experiment in s√=8 TeV proton-proton collisions at the Large Hadron Collider, with a total integrated luminosity of 20.3 fb−1. Results are interpreted in a variety of simplified and specific supersymmetry-breaking models assuming that R-parity is conserved and that the lightest neutralino is the lightest supersymmetric particle. An exclusion limit at the 95% confidence level on the mass of the gluino is set at 1330 GeV for a simplified model incorporating only a gluino and the lightest neutralino. For a simplified model involving the strong production of first- and second-generation squarks, squark masses below 850 GeV (440 GeV) are excluded for a massless lightest neutralino, assuming mass degenerate (single light-flavour) squarks. In mSUGRA/CMSSM models with tan β = 30, A 0 = −2m 0 and μ > 0, squarks and gluinos of equal mass are excluded for masses below 1700 GeV. Additional limits are set for non-universal Higgs mass models with gaugino mediation and for simplified models involving the pair production of gluinos, each decaying to a top squark and a top quark, with the top squark decaying to a charm quark and a neutralino. These limits extend the region of supersymmetric parameter space excluded by previous searches with the ATLAS detector

    Evidence for the Higgs-boson Yukawa coupling to tau leptons with the ATLAS detector

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    Results of a search for H → τ τ decays are presented, based on the full set of proton-proton collision data recorded by the ATLAS experiment at the LHC during 2011 and 2012. The data correspond to integrated luminosities of 4.5 fb−1 and 20.3 fb−1 at centre-of-mass energies of √s = 7 TeV and √s = 8 TeV respectively. All combinations of leptonic (τ → `νν¯ with ` = e, µ) and hadronic (τ → hadrons ν) tau decays are considered. An excess of events over the expected background from other Standard Model processes is found with an observed (expected) significance of 4.5 (3.4) standard deviations. This excess provides evidence for the direct coupling of the recently discovered Higgs boson to fermions. The measured signal strength, normalised to the Standard Model expectation, of µ = 1.43 +0.43 −0.37 is consistent with the predicted Yukawa coupling strength in the Standard Model

    Measurement of the top pair production cross section in 8 TeV proton-proton collisions using kinematic information in the lepton plus jets final state with ATLAS

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    A measurement is presented of the ttˉt\bar{t} inclusive production cross-section in pppp collisions at a center-of-mass energy of s=8\sqrt{s}=8 TeV using data collected by the ATLAS detector at the CERN Large Hadron Collider. The measurement was performed in the lepton+jets final state using a data set corresponding to an integrated luminosity of 20.3 fb1^{-1}. The cross-section was obtained using a likelihood discriminant fit and bb-jet identification was used to improve the signal-to-background ratio. The inclusive ttˉt\bar{t} production cross-section was measured to be 260±1(stat.)23+22(syst.)±8(lumi.)±4(beam)260\pm 1{\textrm{(stat.)}} ^{+22}_{-23} {\textrm{(syst.)}}\pm 8{\textrm{(lumi.)}}\pm 4{\mathrm{(beam)}} pb assuming a top-quark mass of 172.5 GeV, in good agreement with the theoretical prediction of 25315+13253^{+13}_{-15} pb. The ttˉ(e,μ)+jetst\bar{t}\to (e,\mu)+{\mathrm{jets}} production cross-section in the fiducial region determined by the detector acceptance is also reported.Comment: Published version, 19 pages plus author list (35 pages total), 3 figures, 2 tables, all figures including auxiliary figures are available at http://atlas.web.cern.ch/Atlas/GROUPS/PHYSICS/PAPERS/TOPQ-2013-06

    Search for direct production of charginos and neutralinos in events with three leptons and missing transverse momentum in √s = 8 TeV pp collisions with the ATLAS detector

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    A search for the direct production of charginos and neutralinos in final states with three leptons and missing transverse momentum is presented. The analysis is based on 20.3 fb−1 of s√ = 8 TeV proton-proton collision data delivered by the Large Hadron Collider and recorded with the ATLAS detector. Observations are consistent with the Standard Model expectations and limits are set in R-parity-conserving phenomenological Minimal Supersymmetric Standard Models and in simplified supersymmetric models, significantly extending previous results. For simplified supersymmetric models of direct chargino (χ˜±1) and next-to-lightest neutralino (χ˜02) production with decays to lightest neutralino (χ˜01) via either all three generations of sleptons, staus only, gauge bosons, or Higgs bosons, (χ˜±1) and (χ˜02) masses are excluded up to 700 GeV, 380 GeV, 345 GeV, or 148 GeV respectively, for a massless (χ˜01
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