53,893 research outputs found
Branching fraction and CP asymmetry of the decays B+→K0Sπ+ and B+→K0SK+
No full textAn analysis of B+ → K0
Sπ+ and B+ → K0
S K+ decays is performed with the LHCb experiment. The pp
collision data used correspond to integrated luminosities of 1 fb−1 and 2 fb−1 collected at centre-ofmass
energies of
√
s = 7 TeV and
√
s = 8 TeV, respectively. The ratio of branching fractions and the
direct CP asymmetries are measured to be B(B+ → K0
S K+
)/B(B+ → K0
Sπ+
) = 0.064 ± 0.009 (stat.) ±
0.004 (syst.), ACP(B+ → K0
Sπ+
) = −0.022 ± 0.025 (stat.) ± 0.010 (syst.) and ACP(B+ → K0
S K+
) =
−0.21 ± 0.14 (stat.) ± 0.01 (syst.). The data sample taken at
√
s = 7 TeV is used to search for
B+
c
→ K0
S K+ decays and results in the upper limit ( fc · B(B+
c
→ K0
S K+
))/( fu · B(B+ → K0
Sπ+
)) <
5.8 × 10−2 at 90% confidence level, where fc and fu denote the hadronisation fractions of a ¯b
quark
into a B+
c or a B+ meson, respectively
Depolarization and decreased surface expression of K+ channels contribute to NSAID-inhibition of intestinal restitution
No full textNon-steroidal anti-inflammatory drugs (NSAIDs) contribute to gastrointestinal ulcer formation by inhibiting epithelial cell migration and mucosal restitution; however, the drug-affected signaling pathways are poorly defined. We investigated whether NSAID inhibition of intestinal epithelial migration is associated with depletion of intracellular polyamines, depolarization of membrane potential (Em) and altered surface expression of K+ channels. Epithelial cell migration in response to the wounding of confluent IEC-6 and IEC-Cdx2 monolayers was reduced by indomethacin (100μM), phenylbutazone (100μM) and NS-398 (100μM) but not by SC-560 (1μM). NSAID-inhibition of intestinal cell migration was not associated with depletion of intracellular polyamines. Treatment of IEC-6 and IEC-Cdx2 cells with indomethacin, phenylbutazone and NS-398 induced significant depolarization of Em, whereas treatment with SC-560 had no effect on Em. The Em of IEC-Cdx2 cells was: −38.5±1.8mV under control conditions; −35.9±1.6mV after treatment with SC-560; −18.8±1.2mV after treatment with indomethacin; and −23.7±1.4mV after treatment with NS-398. Whereas SC-560 had no significant effects on the total cellular expression of Kv1.4 channel protein, indomethacin and NS-398 decreased not only the total cellular expression of Kv1.4, but also the cell surface expression of both Kv1.4 and Kv1.6 channel subunits in IEC-Cdx2. Both Kv1.4 and Kv1.6 channel proteins were immunoprecipitated by Kv1.4 antibody from IEC-Cdx2 lysates, indicating that these subunits co-assemble to form heteromeric Kv channels. These results suggest that NSAID inhibition of epithelial cell migration is independent of polyamine-depletion, and is associated with depolarization of Em and decreased surface expression of heteromeric Kv1 channels.ID: S0006295207001931; M3: Article; Accession Number: S0006295207001931; Author: L.C. Freeman (b); Author: D.F. Narvaez (a); Author: A. McCoy (a); Author: F.B. von Stein (c); Author: S. Young (b); Author: K. Silver (a); Author: S. Ganta (b); Author: D. Koch (b); Author: R. Hunter (b); Author: R.F. Gilmour (c); Author: J.D. Lillich (a, ⁎); Affiliation: Department of Clinical Sciences, Kansas State University, Manhattan, KS 66506, United States; Affiliation: Department of Anatomy and Physiology, Kansas State University, Manhattan, KS 66506, United States; Affiliation: Department of Biomedical Sciences, Cornell University, Ithaca, NY 14853, United States; Keyword: Non-steroidal anti-inflammatory drugs; Keyword: Intestinal epithelial cells; Keyword: Membrane potential; Keyword: Potassium channels; Number of Pages: 12; Language: English;Source type: Electronic(1)http://search.ebscohost.com/login.aspx?direct=true&db=edselp&AN=S0006295207001931&site=eds-live&scope=sit
Measurement of the ratio of branching fractions B(B0→K∗0γ )/B(B0s→φγ ) and the directCP asymmetry inB 0→K∗0γ
No full textThe ratio of branching fractions of the radiative B decays B0→K⁎0γ and B0s→ϕγ has been measured using an integrated luminosity of 1.0 fb−1 of pp collision data collected by the LHCb experiment at a centre-of-mass energy of s√=7TeV. The value obtained is
B(B0→K⁎0γ)B(B0s→ϕγ)=1.23±0.06(stat.)±0.04(syst.)±0.10(fs/fd),
where the first uncertainty is statistical, the second is the experimental systematic uncertainty and the third is associated with the ratio of fragmentation fractions fs/fd. Using the world average value for B(B0→K⁎0γ), the branching fraction B(B0s→ϕγ) is measured to be (3.5±0.4)×10−5.
The direct CP asymmetry in B0→K⁎0γ decays has also been measured with the same data and found to be
ACP(B0→K⁎0γ)=(0.8±1.7(stat.)±0.9(syst.))%.
Both measurements are the most precise to date and are in agreement with the previous experimental results and theoretical expectations
Emerging trends in agri-nanotechnology: fundamental and applied aspects/ editors: Harikesh B. Singh, Sandhya Mishra, Leonardo Fernandes Fraceto, and Renata de Lima.
No full textIncludes bibliographical references and index.This book provides a thorough analysis of the progressive journey in agriculture from green revolution to nano revolution, with recommendations of certain key points to be addressed in current and future agri-nanotechnology research, on the basis of recognized knowledge gaps. It is hoped that the current volume will serve as a reference book for students, scientists, professors, teachers and researchers who are involved in the study and research on the various aspects of agri-nanotechnology.Rewinding the History of Agriculture and Emergence of Nanotechnology in Agriculture / Sandhya Mishra, Leonardo Fernandes Fraceto, Xiaodong Yang and Harikesh B. Singh -- Use of Nanomaterials in Agriculture: Potential Benefits and Challenges / Daiana Silva Ávila, Solange Cristina Garcia, Marcelo Dutra Arbo, Jessica Nardi and Maurício Tavares Jacques -- Green Nanotechnology for Enhanced Productivity in Agriculture / Kelvii Wei Guo -- Nanonutrient from Fungal Protein: Future Prospects on Crop Production / J.C. Tarafdar and Indira Rathore -- Multifarious Applications of Nanotechnology for Enhanced Productivity in Agriculture / K.S. Subramanian, K. Raja and S. Marimuthu -- Different Methods of Nanoparticle Synthesis and Their Comparative Agricultural Applications / Kunzes Dolma -- Nanotoxicity to Agroecosystem: Impact on Soil and Agriculture / Mahendra Rai, Aniket Gade, Avinash P. Ingle, Indarchand Gupta, Raksha Pandit and Carolina Alves dos Santos -- Factors Affecting the Fate, Transport, Bioavailability and Toxicity of Nanoparticles in the Agroecosystem / Sudheer K. Yadav, Jai Singh Patel, Gagan Kumar, Arpan Mukherjee, Anupam Maharshi, Birinchi K. Sarma, Surendra Singh and Harikesh B. Singh -- Nanotechnology: Comprehensive Understanding of Interaction, Toxicity and the Fate of Biosynthesized Nanoparticles in the Agroecosystem / Rahul Singh Rajput, Jyoti Singh, Prachi Singh, Manoj Kumar Chitara, Ratul Moni Ram, Sandhya Mishra and Harikesh B. Singh -- Global Market of Nanomaterials and Colloidal Formulations for Agriculture: An Overview / Estefânia V.R. Campos, Jhones L. de Oliveira, Leonardo Fernandes Fraceto and Renato Grillo -- The Responsible Development of Nanoproducts: Lessons from the Past / Ankit Srivastava and Arohi Srivastava -- Nanotechnology Application and Emergence in Agriculture Semih Otles and Buket Yalcin Sahyar -- Positive and Negative Effects of Nanotechnology / Amira S. Soliman -- Vanguard Nano(bio)sensor Technologies Fostering the Renaissance of Agriculture / Amina Antonacci, Fabiana Arduini and Viviana Scognamiglio -- Current Trends and Future Priorities of Nanofertilizers / Carolina Castro Bueno -- Biosafety and Regulatory Aspects of Nanotechnology in Agriculture and Food / Akansha Jain, Harikesh B. Singh and Sampa Das -- Implication of Nanotechnology for the Treatment of Water and Air Pollution / R.K. Chaturvedi -- Role of Nanotechnology in Insect Pest Management / Deepika Chauhan, N.N. Singh and Vijay Kumar Mishra.1 online resource (xix, 302 pages
Visible Light Induced Photocatalytic Activity of Polyaniline Modified TiO2 and Clay-TiO2 Composites
No full textSonochemical synthesis of Titania, Titania-Polyaniline, and Clay-Titania-Polyaniline composites were car-ried out. The composite systems were characterized by various physico-chemical techniques. Photocatalytic activity was tested selecting some common dyes as substrates. Composites exhibited higher activity for the degradation of dyes under visible light in most of the cases. © 2013 BCREC UNDIP. All rights reservedReceived: 15th May 2013; Revised: 1st September 2013; Accepted: 3rd October 2013[How to Cite: Sandhya, K.P., Haridas, S., Sugunan, S. (2013). Visible Light Induced Photocatalytic Activity of Polyaniline Modified TiO2 and Clay-TiO2 Composites. Bulletin of Chemical Reaction Engineering & Catalysis, 8 (2): 145-153. (doi:10.9767/bcrec.8.2.4949.145-153)][Permalink/DOI: http://dx.doi.org/10.9767/bcrec.8.2.4949.145-153]</p
Probing of Barrier Induced Deviations in Current-Voltage Characteristics of Polymer Devices by Impedance Spectroscopy
No full textTemperature dependent current-voltage measurements have been performed on poly(3-methylthiophene) based devices in metal/polymer/metal geometry in temperature range 90-300 K. Space charge limited current (SCLC) controlled by exponentially distributed traps is observed at all the measured temperatures at intermediate voltage range. At higher voltages, trap-free SCLC is observed at 90 K only while slope less than 2 is observed at higher temperatures which is quiet unusual in polymer devices. Impedance measurements were performed at different bias voltages. The unusual behavior observed in current-voltage characteristics is explained by Cole-Cole plot which gives the signature of interface dipole on electrode/polymer interface. Two relaxation mechanisms are obtained from the real part of impedance vs frequency spectra which confirms the interface related phenomena in the devic
Author Correction: Human fingerprint in global weather
No full textIn the version of this News & Views originally published, the ref. 5 author surnames Meihnausen, Fisher and Szekely were spelled incorrectly; they should have been spelled Meinshausen, Fischer and Székely, respectively. This has now been corrected. © 2020, Springer Nature Limited.11Nsciessciscopu
Measurement of the CP-violating phase phi(s) in the B-s(0) -> J/psi phi(1020) -> mu(+)mu-K+K- channel in proton-proton collisions at root s=13 TeV
No full textThe CP-violating weak phase ?s and the decay width difference ??s between the light and heavy B0s mass eigenstates are measured with the CMS detector at the LHC in a sample of 48 500 reconstructed B0s? J/I) d (1020) ?11+11? K+K? events. The measurement is based on a data sample corresponding to an integrated luminosity of 96.4 fb?1, collected in proton-proton collisions at ?s = 13 TeV in 2017?2018. To extract the values of ?s and ??s, a time-dependent and flavor-tagged angular analysis of the 11+11?K+K? final state is performed. The analysis employs a dedicated tagging trigger and a novel opposite-side muon flavor tagger based on machine learning techniques. The measurement yields ?s = ?11 ?50 (stat) ? 10 (syst) mrad and ??s = 0.114 ? 0.014 (stat)? 0.007 (syst) ps?1, in agreement with the standard model predictions. When combined with the previous CMS measurement at ?s = 8 TeV, the following values are obtained: ?s = ?21 ? 44 (stat) ? 10 (syst) mrad, ??s = 0.1032 ? 0.0095 (stat) ? 0.0048 (syst) ps?1, a significant improvement over the 8 TeV result. ? 2021 The Author(s). Published by Elsevier B.V. This is an open access article under the CC BY licens
Prompt charm production in pp collisions at √<span style="text-decoration:overline">s</span>=7 TeV
No full textCharm production at the LHC in pp collisions at s√=7 TeV is studied with the LHCb detector. The decays D0→K−π+, D+→K−π+π+, D⁎+→D0(K−π+)π+, D+s→ϕ(K−K+)π+, Λ+c→pK−π+, and their charge conjugates are analysed in a data set corresponding to an integrated luminosity of 15 nb−1. Differential cross-sections dσ/dpT are measured for prompt production of the five charmed hadron species in bins of transverse momentum and rapidity in the region 0<pT<8 GeV/c and 2.0<y<4.5. Theoretical predictions are compared to the measured differential cross-sections. The integrated cross-sections of the charm hadrons are computed in the above pT-y range, and their ratios are reported. A combination of the five integrated cross-section measurements gives
σ(cc¯)pT<8 GeV/c,2.0<y<4.5=1419±12(stat)±116(syst)±65(frag) μb,
where the uncertainties are statistical, systematic, and due to the fragmentation functions
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