The effect of ammonia exposure and substrate temperature on the reaction of ammonia with GaAs(lOO)-c(8 x 2) has been studied using temperature programmed desorption (TPD), X-ray photoelectron spectroscopy (XPS), and high resolution electron energy loss spectroscopy (HREELS). TPD data indicate that thermal decomposition of ammonia occurs at moderate temperatures (250 K). Above 250 K, recombinati...

A dual purpose mass spectrometer chamber capable of performing molecular beam scattering (MBS) and temperature programmed desorption (TPD) is detailed. Two simple features of this design allow it to perform these techniques. First, the diameter of entrance aperture to the mass spectrometer can be varied to maximize signal for TPD or to maximize angular resolution for MBS. Second, the mass spect...

Post-biotinylation of the alkyl azide derivative of trifluoromethyl phenyldiazirine (TPD) was elucidated to apply a photoaffinity biotinylation technique. A photo-modified polyvinilidene difluoride (PVDF) membrane was used as a photolabeled component and we introduced biotin by Staudinger-Bertozzi ligation. The 15 pmol amount of biotinylated reagent was still effective for the visualization of ...

The simultaneous esterification and transesterification of Jatropha curcas oil (JCO) was carried out in the presence of Bi2O3 (1–7 wt.%) modified La2O3 catalyst at atmospheric pressure. The catalyst were characterized by X-ray diffraction (XRD), BET surface area, desorption of CO2 (TPD-CO2) and NH3 (TPD-NH3). Under the optimal reaction condition of methanol/oil molar ratio of 15:1, 2 wt.% of ca...

We prepared a new V-Rh(111) alloy with (2×2) surface geometry. The alloy system and the adsorption of CO were investigated by the photoelectron spectroscopy of the valence and core states using synchrotron radiation, and by temperature-programmed thermal desorption spectroscopy (TPD). The obtained results indicate that the vanadium atoms in the prepared alloy were situated mainly in the subsurf...

The calculation of the transverse photodeflection signal in the framework of wave optics proves to be a more accurate approach compared to that of geometrical optics. The influence of the account of wave optics effects on a signal behavior was theoretically analyzed under various conditions. It was shown that a difference between the signals calculated using both approaches, is most essential f...

For sentiment classification, it is often recognized that embedding based on distributional hypothesis is weak in capturing sentiment contrast–contrasting words may have similar local context. Based on broader context, we propose to incorporate Theta Pure Dependence (TPD) into the Paragraph Vector method to reinforce topical and sentimental information. TPD has a theoretical guarantee that the ...

The growth of Ag on an ordered Al2O3 surface was studied by low energy ion scattering spectroscopy (LEIS), scanning tunneling microscopy (STM), X-ray photoelectron spectroscopy (XPS), and temperature programmed desorption (TPD). Three-dimensional (3D) growth of Ag clusters was observed with STM and LEIS, with the cluster size increasing with Ag coverage. The XPS core level binding energies and ...

Chronic Chagas Disease is a malady affecting a highly vulnerable population, with currently no promising cure. This study looked at natural products from the Taiwan Pharmaceutical Databank, and utilized an in-silico approach to discover potential new drug compounds. Two structures from the PDB were identified for docking, namely 1S0J and 1MS8. The crystal structures were of Trans-sialidase, a s...