This Letter reports new results from the MINOS experiment based on a two-year exposure to muon neutrinos from the Fermilab NuMI beam. Our data are consistent with quantum-mechanical oscillations of ...neutrino flavor with mass splitting |Deltam2| = (2.43+/-0.13) x 10(-3) eV2 (68% C.L.) and mixing angle sin2(2theta) > 0.90 (90% C.L.). Our data disfavor two alternative explanations for the disappearance of neutrinos in flight: namely, neutrino decays into lighter particles and quantum decoherence of neutrinos, at the 3.7 and 5.7 standard-deviation levels, respectively.
The research was carried out in order to study the molecular mechanisms of herbicide binding (pinoxaden, quizalofop-P-tefuril, prometrin, metribuzin, metsulfuron-methyl) with target proteins ...(acetyl-CoA-carboxylase, acetolactate synthase, cytochrome P450, 4-hydroxyphenylpyruvate dioxygenase) of weeds growing in Siberia: common wild oat (
Avena fatua
L.), couch grass (
Elymus repens
(L.) Gould), red-root amaranthus (
Amaranthus retroflexus
L.), white gauze (
Chenopodium album
L.), and green foxtail (
Setaria viridis
(L) P Beauv). The study was carried out in Novosibirsk oblast in 2022–2023. Using the bioinformatic methods, virtual three-dimensional complexes of pesticides and their targets have been created. A new approach to identifying the parameters of the cavity of binding sites is proposed, which consists in combining the alignment method and the machine-learning technology. Docking of pesticides with targets has been carried out. Calculation of the binding energy indicates a high degree of stability of the ligand-protein complexes. The proposed in silico approach may be useful for elucidating the behavior of herbicides when bound to weed enzymes. This approach allows a deeper understanding of the mechanism of action and ecotoxicological aspects of pesticide use. The complexes of herbicides and proteins involved have a potential high stability due to the low energy of binding to receptors, which varies from –5.60 to –13.24 kcal/mol. The value of the binding energy has not shown a direct dependence on the number of amino acid residues of the ligand-binding site. In general, the study has complemented some aspects of the molecular mechanisms of herbicide binding to weed target proteins; however, more in-depth study is required in order to localize critical amino acid points involved in the biological functions of target proteins.
TAUBAIKAL neutrino telescope Kotelnikov, K. A.; Kotelnikov, S. K.; Trubkin, Yu. A. ...
Bulletin of the Lebedev Physics Institute,
09/2013, Letnik:
40, Številka:
9
Journal Article
Recenzirano
The project of designing a superhigh-energy
τ
-neutrino telescope is discussed.
The inclusive production of D*+/-(2010) mesons in deep-inelastic scattering is studied with the HI detector at HERA. In the kinematic region 1 < Q(2) < 100 GeV2 and 0.05 < y < 0.7 an e(+) p cross ...section for inclusive D*+/- meson production of 8.50 +/- 0.42(stat.)(-100)(+1.21)(syst.) nb is measured in the visible range p(tD*) > 1.5 GeV and eta(D*) < 1.5. Single and double differential inclusive D*+/- meson cross sections are compared to perturbative QCD calculations in two different evolution schemes, The charm contribution to the proton structure, F-c(2)(x, Q(2)), is determined by extrapolating the visible charm cross section to the full phase space. This contribution is found to rise from about 10% at Q(2) = 1.5 GeV2 to more than 25% at Q(2) = 60 GeV2 corresponding to x values ranging from 5 x 10(-5) to 3 x 10(-3). (C) 2002 Elsevier Science B.V. All rights reserved.
The elastic electroproduction of rho mesons is studied at HERA with the H1 detector for a photon virtuality in the range 1 Q^2 60 GeV^2 and for a hadronic centre of mass energy in the range 30 W 140 ...GeV. The shape of the pipi mass distribution in the rho resonance region is measured as a function of Q^2. The full set of rho spin density matrix elements is determined, and evidence is found for a helicity flip amplitude at the level of 8 +- 3 % of the non-flip amplitudes. Measurements are presented of the dependence of the cross section on Q^2, W and t (the four-momentum transfer squared to the proton). They suggest that, especially at large Q^2, the gamma^*p cross section develops a stronger W dependence than that expected from the behaviour of elastic and total hadron-hadron cross sections.
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