Photochemical Reaction of ihydroartemisinin esters

Photochemical reaction of three dihydroartemisinin esters: acetate, benzoate and succinate under 254 nm UV light in CH2Cl2 have been studied. The result showed, that these artemisinin derivatives are easily decomposed forming different elimination and rearrangement compounds

Triterpene from the roots of Codonopsis pilosula.

From the roots of Codonopsis pilosula (Franch) Nannf (Campanulaceae) five triterpenoids: taraxerol, taraxeryl acetate, 14-a-taraxeran-3-one and D:B-friedoolean-5-ene-3-b-ol as well as a-spinasterone were isolated. Their structures have been identified by MS, 1H-, 13C-NMR spectroscopy and comparison with reported data

Search for neutral MSSM Higgs bosons decaying to a pair of tau leptons in pp collisions

Peer reviewe

Constraints on parton distribution functions and extraction of the strong coupling constant from the inclusive jet cross section in pp collisions at √s=7 TeV

Peer reviewe

Study of hadronic event-shape variables in multijet final states in pp collisions at √s=7 TeV

Peer reviewe

Measurement of prompt J/ψ pair production in pp collisions at √s = 7 Tev

Peer reviewe

Searches for electroweak production of charginos, neutralinos, and sleptons decaying to leptons and W, Z, and Higgs bosons in pp collisions at 8 TeV

Peer reviewe

Measurement of top quark–antiquark pair production in association with a W or Z boson in pp collisions at √s=8 TeV

Peer reviewe

Irregular migration from a European perspective : an introduction

A search for pair production of third-generation scalar leptoquarks and supersymmetric top quark partners, top squarks, in final states involving $\tau$ leptons and bottom quarks is presented. The search uses events from a data sample of proton-proton collisions corresponding to an integrated luminosity of 19.7 fb$^{-1}$ collected with the CMS detector at the LHC with $\sqrt{s}$ =8 TeV. The number of observed events is found to be in agreement with the expected standard model background. Third-generation scalar leptoquarks with masses below 740 GeV are excluded at 95% confidence level, assuming a 100% branching fraction for the leptoquark decay to a $\tau$ lepton and a bottom quark. In addition, this mass limit applies directly to top squarks decaying via an R-parity violating coupling $\lambda^{\prime}_{333}$. The search also considers a similar signature from top squarks undergoing a chargino-mediated decay involving the R-parity violating coupling $\lambda^{\prime}_{3jk}$. Each top squark decays to a $\tau$ lepton, a bottom quark, and two light quarks. Top squarks in this model with masses below 580 GeV are excluded at 95% confidence level. The constraint on the leptoquark mass is the most stringent to date, and this is the first search for top squarks decaying via $\lambda^{\prime}_{3jk}$