44 Tau: Discrimination between MS and post-MS models

Extraction of ms and |Vus | from Hadronic Tau Decays 1

We review recent work to determine the strange quark mass ms as well as the proposal to determine |Vus| using hadronic τ decay data. The recent update of the strange spectral function by OPAL and their moments of the invariant mass distribution are employed. Our results are |Vus| = 0.2208± 0.0034 and ms(2GeV) = 81±22 MeV. Our result is already competitive to the standard extraction of |Vus| fro...

Chemical Analysis of Pesticides Using GC/MS, GC/MS/MS, and LC/MS/MS

There are well over 500 registered pesticides worldwide for use in agricultural regions and new agrochemicals are introduced to the marketplace continuously. This chapter deals with the chemical analysis methods for the main pesticide chemical classes that are most frequently analyzed with gas chromatography (GC) or liquid chromatography (LC) coupled to mass spectrometry (MS). GC amenable pesti...

Discrimination of sepsis stage metabolic profiles with an LC/MS-MS-based metabolomics approach

BACKGROUND To identify metabolic biomarkers that can be used to differentiate sepsis from systemic inflammatory response syndrome (SIRS), assess severity and predict outcomes. METHODS 65 patients were involved in this study, including 35 patients with sepsis, 15 patients with SIRS and 15 normal patients. Small metabolites that were present in patient serum samples were measured by liquid chro...

Ms Imaging and Ambient Ionization-ms

ESI and nanoESI - CID - MS / MS