Can oxygen vacancies in ceria surfaces be measured by O1s photoemission spectroscopy?

X-ray photoemission spectroscopy is a standard technique for materials characterization and the O 1s binding energy is commonly measured for oxides. Here we use density functional theory calculations to investigate how the O 1s binding energy in CeO(111) is influenced by the presence of oxygen vacancies. The case with point vacancies in CeO(111) is compared to complete reduction to CeO.

Interplay between CO Disproportionation and Oxidation: On the Origin of the CO Reaction Onset on Atomic Layer Deposition-Grown Pt/ZrO Model Catalysts.

Pt/ZrO model catalysts were prepared by atomic layer deposition (ALD) and examined at mbar pressure by sum frequency generation (SFG) spectroscopy and near-ambient pressure X-ray photoelectron spectroscopy (NAP-XPS) combined with differentially pumped mass spectrometry (MS). ALD enables creating model systems ranging from Pt nanoparticles to bulk-like thin films. Polarization-dependent SFG of CO adsorption reveals both the adsorption configuration and the Pt particle morphology.

Evaluation of milk powder quality by protein oxidative modifications.

The objective of the present research was to evaluate commercially available milk powders according to their protein oxidative modifications and antioxidant capacity, and to evaluate if these characteristics are related to physical quality parameters such as dispersibility or stability during storage. Fifteen commercially processed spray-dried milk powders were evaluated: 6 whole milk powders (WMP), 4 skim milk powders (SMP), and 5 infant formula powders (IFP). Protein oxidative status was measured as protein carbonyl (PC) content, dityrosine content, and extent of protein polymerization.

[Tutors and assistants for apprenticeship for students in the university diploma course in nursing science].

The article presents the results of a work carried out by a group of nurses dealing with nursing education, both graduate (Hospital School and then University) and post graduate, since about ten years. The Authors have defined role, functions, spheres of activity, hierarchic and functional relationships, qualifications and abilities of the two new professional figures quoted in the document agreed between Lombardia Region and Lombardia Universities about the new university diploma courses in Nursing Sciences: the tutor and the clinical instructor. In order to do such a work the Authors started from the literature review.