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We measure the mass of the η' meson using ψ(2S) → π~+π~- J/ψ, J/ψ → γη' events acquired with the CLEO-c detector operating at the CESR e~+e~- collider. Using three decay modes, η' → ρ~0γ, η'→ π~+π~- η with η →...
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We measure the mass of the η' meson using ψ(2S) → π~+π~- J/ψ, J/ψ → γη' events acquired with the CLEO-c detector operating at the CESR e~+e~- collider. Using three decay modes, η' → ρ~0γ, η'→ π~+π~- η with η → γγ, and η'→ π~+π~- η with η → π~+π~-π~0, we find M_(η') = 957.793 ± 0.054 ± 0.036 MeV, in which the uncertainties are statistical and systematic, respectively. This result is consistent with but substantially more precise than the current world average.
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The U.S. Department of Energy Solid State Lighting program, as part of its support of standards and test methods development efforts, performed a series of integrating sphere comparison tests in 2pi and 4pi geometries. These tests...
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The U.S. Department of Energy Solid State Lighting program, as part of its support of standards and test methods development efforts, performed a series of integrating sphere comparison tests in 2pi and 4pi geometries. These tests were conducted to help characterize the potential difference between various test protocols for identical lighting products as this would relate to light emitting diode (LED) product testing. A total of 11 different directional and 11 different omnidirectional products were tested over three different testing protocols. These protocols represent real-world test conditions depending on varying laboratory equipment and calibration capabilities. The analysis of the data indicates that there are significant differences in how lamps are testing within the same integrating sphere using common industry accepted methods and calibration standards. The testing identified differences of 4% to 18% between common industry test formats for the particular lamp type and potential alternative formats. These results provide information on the differences in test formats and to help test method developers determine when it is important to more specifically define how tests must be conducted under different formats.
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The T-shaped aromatic non-covalent interaction involving pyridine and benzene rings is studied by means of RI-MP2/aug-cc-pVTZ ab initio calculations. They indicate that the participation of the nitrogen atom of pyridine in a varie...
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The T-shaped aromatic non-covalent interaction involving pyridine and benzene rings is studied by means of RI-MP2/aug-cc-pVTZ ab initio calculations. They indicate that the participation of the nitrogen atom of pyridine in a variety of interactions or bonding (coordinated to a metal, hydrogen bonding, N-oxide derivative or protonation) affects the edge-to-face aromatic interaction with benzene. This long distance effect has been studied using the 'atoms-in-molecules' theory and the Molecular Interaction Potential with polarization (MIPp) partition scheme. Experimental evidence for such interactions has been obtained from the Cambridge Structural Database.
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Diseases of crops are the main reason for the decrease in yield and product quality. Blast is the most dangerous disease in all areas of world rice cultivation. The most effective, economically viable, and environmentally friendly...
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Diseases of crops are the main reason for the decrease in yield and product quality. Blast is the most dangerous disease in all areas of world rice cultivation. The most effective, economically viable, and environmentally friendly strategy to combat it is the development of resistant varieties. The use of molecular genetic markers (DNA markers) linked to the loci of blast resistance is relevant in this direction. The objective of the study was to introgress and pyramid genes effective in the south of Russia for race-specific resistance to blastPi ta, Pi-b, Pi-1, Pi-2, Pi-33, Pi-40into the genotypes of highly productive rice varieties of domestic breeding to obtain new forms resistant toP. oryzae. To achieve this, varieties Flagman and Boyarin were hybridized with the donors of resistance to blastIR-36, Bl-1, C101-Lac, C101Lac-A-51, IR 83260-2-10-5-2-1-B,which have the genesPi-ta, i-b, Pi-1 + Pi-33, Pi-2, Pi-40,respectively, with a growing season of more than 150 days. Three backcrosses were carried out and the breeding material was obtained. Several samples with high rates of milled rice quality and blast resistance, productivity, and other economically valuable traits were identified. The program for combining the genes of resistance to blast was performed. The hybridization of the obtained genotypes with the integratedPigenes between themselves in their various combinations was carried out. The result was a breeding variety with three resistance genes (Pi-1; Pi-2; Pi-33). The cultivation of such varieties in production will reduce the use of chemical protective equipment and avoid pollution of grain ecosystems.
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Pionium (pi(+)pi(-) bound state) lifetime is measured with improved precision with respect to earlier work, and the pi pi s-wave scattering length difference between I = 0 and I = 2 amplitudes \a(0) - a(2)\ is determined to 5% precision.
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The inclusive A(gamma, pi(+) pi(-))X reaction is studied theoretically. A sizable enhancement of the cross section is found, in comparison with the scaling of the deuteron cross section (sigma(d)A/2). This enhancement is due to th...
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The inclusive A(gamma, pi(+) pi(-))X reaction is studied theoretically. A sizable enhancement of the cross section is found, in comparison with the scaling of the deuteron cross section (sigma(d)A/2). This enhancement is due to the modifications in the nuclear medium of the N-gamma --> pi pi N amplitude and the pion dispersion relation. The enhancement is found to be bigger than the one already observed in the (pi, pi pi) reaction in nuclei. [References: 26]
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PI-88, uniformly labelled with [14C] was prepared by incorporating D-[14C] glucose into the fermentation of Pichia (Hansenula) holstii NRRL Y-2448 under controlled conditions to produce [14C]-labelled extracellular phosphomannan. ...
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PI-88, uniformly labelled with [14C] was prepared by incorporating D-[14C] glucose into the fermentation of Pichia (Hansenula) holstii NRRL Y-2448 under controlled conditions to produce [14C]-labelled extracellular phosphomannan. Subsequent acid catalyzed hydrolysis gave the [14C]-labelled oligosaccharide phosphate fraction which was sulfonated with excess sulfur trioxide pyridine complex to give [14C]PI-88. [35S]-labelled PI-88 was similarly prepared by the sulfonation of unlabelled oligosaccharide phosphate fraction with [35S] sulfur trioxide pyridine complex. Copyright < copyright > 2002 John Wiley & Sons, Ltd.
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The phosphoinositide 3-kinase (PI3K) family is important to nearly all aspects of cell and tissue biology and central to human cancer, diabetes and aging. PI3Ks are spatially regulated and multifunctional, and together, act at nea...
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The phosphoinositide 3-kinase (PI3K) family is important to nearly all aspects of cell and tissue biology and central to human cancer, diabetes and aging. PI3Ks are spatially regulated and multifunctional, and together, act at nearly all membranes in the cell to regulate a wide range of signaling, membrane trafficking and metabolic processes. There is a broadening recognition of the importance of distinct roles for each of the three different PI3K classes (I, II and III), as well as for the different isoforms within each class. Ongoing issues include the need for a better understanding of the in vivo complexity of PI3K regulation and cellular functions. This Cell Science at a Glance article and the accompanying poster summarize the biochemical activities, cellular roles and functional requirements for the three classes of PI3Ks. In doing so, we aim to provide an overview of the parallels, the key differences and crucial interplays between the regulation and roles of the three PI3K classes.
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We present a detailed study of the excitation spectra of the Lambda-hypernuclei obtained through the (pi(+), K+) reaction, and we compare our results for the cross sections with the most recent data from BNL and KEK experiments. T...
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We present a detailed study of the excitation spectra of the Lambda-hypernuclei obtained through the (pi(+), K+) reaction, and we compare our results for the cross sections with the most recent data from BNL and KEK experiments. The cross sections are obtained in the distorted-wave-impulse approximation (DWIA) with a proper optical potential for pions and kaons, obtained in the eikonal approximation. For the first time, a completely self-consistent treatment of the Lambda-hypernuclei structure has been done, by means of the response-function method in the Hartree-Fock (HF) approximation with a Skyrme-type interaction. Moreover, the continuum is treated exactly with the Green-function method. Our results, from C-12(Lambda) to Y-89(Lambda), agree quite well with the experimental data. The shell model seems to give a very good description of these systems, where the Lambda-particle occupies single-particle levels with no sign of collective effects and is uninhibited by the Pauli principle. Possible improvements of our model are suggested. [References: 30]
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Ser and Thr kinase AKT also known as protein kinase B (PKB) was discovered more than two and half decades ago and is one of the key downstream molecules in the phosphoinositide 3-kinase signaling pathways. The pleiotropic effects ...
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Ser and Thr kinase AKT also known as protein kinase B (PKB) was discovered more than two and half decades ago and is one of the key downstream molecules in the phosphoinositide 3-kinase signaling pathways. The pleiotropic effects of this kinase have attracted intense interest and limelight in cancer biology, cancer therapy, diabetes, and cardiovascular diseases. Authors may refer to other more comprehensive and recent reviews on AKT/PKB (Manning and Cantley, 2007; Manning and Toker, 2017). AKT/PKB is one of the most enigmatic and most studied signaling molecule in cancers and is a significant therapeutic target (Brown and Banerji, 2017). Yet, how AKT/PKB activation couples with its downstream target/substrate molecules that function in diverse subcellular compartments remains obscure. Recent studies indicate the continuous interaction of AKT/PKB with PI3,4,5P_3 or PI3,4P_2 in a lipid membrane is required for its activation throughout the cells (Ebner et al., 2017). Here, we summarize the recent progress on the mechanism for phosphoinositide (PI3,4,5P_3 and PI3,4P_2) spatial control of AKT/PKB activation on the plasma membrane and endomembrane compartments.
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