Synthesis of nanosheet crystallites of ruthenate with an alpha-NaFeO2-related structure and its electrochemical supercapacitor property.

Unilamellar crystallites of conductive ruthenium oxide having a thickness of about 1 nm were obtained via elemental exfoliation of a protonic layered ruthenate, H(0.2)RuO(2).0.

Liquid chromatography-electrospray ionization-tandem mass spectrometry for simultaneous analysis of chlorogenic acids and their metabolites in human plasma.

A method using liquid chromatography-electrospray ionization-tandem mass spectrometry (LC-ESI-MS/MS) was developed for the simultaneous analysis of nine chlorogenic acids (CGAs), three isomers each of caffeoylquinic acids (CQAs), feruloylquinic acids (FQAs) and dicaffeoylquinic acids (dCQAs), and their two metabolites, caffeic acid (CA) and ferulic acid (FA), in human plasma. In simultaneous multiple reaction monitoring (MRM) measurements using ESI-MS/MS with a negative ion mode, a deprotonated molecular ion derived from each of the 11 molecules was used as a precursor ion while three diagnostic product ions characteristic for each were selected for the qualitative analysis. To obtain maximal intensities for all diagnostic product ions, the collision energy was optimized for each one.

Proton and electron conductivity in hydrous ruthenium oxides evaluated by electrochemical impedance spectroscopy: the origin of large capacitance.

Electrochemical impedance spectroscopy was conducted on a series of hydrous ruthenium oxides, RuO(2).xH(2)O, (x = 0.5, 0.