The P(I) gradually becomes independent of temperature below approximate to 5 K, which suggests a crossover of the escape process from thermal activation to quantum tunneling at such a high temperature. (C) 2009 American Institute of Physics. [doi: 10.1063/1.3236666]“
“(PACE

2009; 32:1101-1104).”
“In the current study, our investigation of inhibitory compounds from the ethyl acetate-soluble fraction of 95% ethanol extract of Thunberg’s Geranium (Geranium thunbergii Sieb. et Zucc.; TG) was followed by identification of the inhibitory compounds by a combination of HPLC microfractionation and an enzyme assay in a 96-well plate. Structural analyses of the active compounds were carried out using LC-MS (n) . The main compound inhibiting yeast alpha-glucosidase in this plant was tentatively identified as geraniin by LC-MS (n) . Six compounds, Small molecule library BAY 63-2521 p-hydroxybenzoic acid (1) (IC50 > 362.32 mu M), brevifolin carboxylic acid (2) (IC50 > 171.23 mu M), geraniin (3)

(IC50 =4.09 mu M), ellagic acid (4) (IC50 = 63.91 mu M), kaempferol-3-O-arabinofuranosyl-7-O-rhamnopyranoside (5) (IC50 =27.70 mu M), and kaempferitrin (6) (IC50 > 86.51 mu M) were isolated from the active EtOAc-soluble fraction of TG on yeast alpha-glucosidase. However, the 6 isolated compounds were very weak inhibitory activity against mammalian alpha-glucosidase and alpha-amylase. This study suggests that the developed HPLC microfractionation with an enzyme assay system is one of the powerful tools for rapid screening and identification of enzyme inhibitors in complex extracts.”
“The total cross section has been measured for the electron induced dissociation of trimethyl (methylcyclopentadienyl) platinum (IV) [MeCpPt(IV)Me(3)], a Pt precursor often

used in focused electron beam induced processing https://www.selleckchem.com/products/AZD1152-HQPA.html (FEBIP), for incident electron energies ranging between 3-3 keV. Measurements were performed for the precursor in the adsorbed state under ultrahigh vacuum conditions. The techniques used in this study were temperature programmed desorption, x-ray photoelectron spectroscopy and mass spectrometry. Two surfaces were used in these experiments, amorphous carbon overlayers containing embedded Pt atoms (a:C-Pt), formed by the electron decomposition of the Pt precursor, and atomically clean Au. The results from these three experiments revealed a comparatively low total cross section at 8 eV (4.2 +/- 0.3 x 10(-17) cm(2) on the a: C-Pt and 1.4 +/- 0.1 x 10(-17) cm(2) on the Au) that increases with increasing incident electron energy, reaching a maximum at around 150 eV (4.1 +/- 0.5 x 10(-16) cm(2) on the a:C-Pt and 2.3 +/- 0.2 x 10(-16) cm(2) on the clean Au), before decreasing at higher incident electron energies, up to 3000 eV.