Measurement of vector boson production cross sections and their ratios using pp collisions at √s = 13.6 TeV with the ATLAS detector

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Combination of searches for heavy spin-1 resonances using 139 fb−1 of proton-proton collision data at √s = 13 TeV with the ATLAS detector

A combination of searches for new heavy spin-1 resonances decaying into diferent pairings of W, Z, or Higgs bosons, as well as directly into leptons or quarks, is presented. The data sample used corresponds to 139 fb−1 of proton-proton collisions at √s = 13 TeV collected during 2015–2018 with the ATLAS detector at the CERN Large Hadron Collider. Analyses selecting quark pairs (qq, bb, tt¯, and tb) or third-generation leptons (τν and τ τ ) are included in this kind of combination for the frst time. A simplifed model predicting a spin-1 heavy vector-boson triplet is used. Cross-section limits are set at the 95% confdence level and are compared with predictions for the benchmark model. These limits are also expressed in terms of constraints on couplings of the heavy vector-boson triplet to quarks, leptons, and the Higgs boson. The complementarity of the various analyses increases the sensitivity to new physics, and the resulting constraints are stronger than those from any individual analysis considered. The data exclude a heavy vector-boson triplet with mass below 5.8 TeV in a weakly coupled scenario, below 4.4 TeV in a strongly coupled scenario, and up to 1.5 TeV in the case of production via vector-boson fusion

Study of the uptake of ribonuclease by onion root-tip cells

The following observations have been made concerning the uptake of ribonuclease by living onion roots: 1. 1. The penetration of RNAse in roots separated from the bulb is 37 per cent less than that observed in the case of roots still attached to the bulb. 2. 2. The uptake of RNAse at 4 °C is 40 per cent less than at 20 °C. 3. 3. Dinitrophenol (DNP) has no effect on the uptake, which is, however, inhibited by cyanide. 4. 4. Buffered DNP, as well as phosphate buffer alone, has an inhibitory effect on the penetration. 5. 5. There is no competition for penetration between ribonuclease and cytochrome c. 6. 6. The ions K +, Na +, Ca 2+ and Mg 2+ exert an inhibitory effect on the penetration of RNAse. 7. 7. Sixty per cent of the RNAse which has penetrated in onion roots can be found in cell debris, 25 per cent in the mitochondria and 15 per cent in the microsomcs. 8. 8. Only 50 per cent of the RNAse which has penetrated is released by a 24-hour washing. The mechanism of the penetration of RNAsc in onion roots is discussed. © 1960.SCOPUS: ar.jinfo:eu-repo/semantics/publishe

Antinutagenic and anticarcinogeic acticity of phenolic compounds: possible involvement of the structural activity

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