Vatikani dogmast

Digiteeritud Euroopa Regionaalarengu Fondi rahastusel, projekti "Eesti teadus- ja õppekirjandus" (2014-2020.12.03.21-0848) raames.https://www.ester.ee/record=b1136355*es

The Development of an Integrated External Environment Monitoring Framework Aimed at the Internal Control of the Procurement Process of Fat and Oil Companies

The article deals with the development of methodical recommendations for monitoring the external environment aimed at the internal control of the procurement process in business based on a risk-oriented approach and with the digital techniques used by fat-and-oil industry companies. For research purposes, the following were necessary: first, to develop an integrated scheme for monitoring the external environment aimed at the internal control of the procurement process, taking into account the specifics of the commercial organization’s activity; and second, to analyze the features of the integrated monitoring scheme with the use of digital techniques. The methodology for developing methodical recommendations for monitoring the external environment aimed at the internal control of the procurement process is based on a risk-oriented approach, the unforeseen circumstances theory, and the use of big data and business analytics. In the first section, the authors substantiate the relevance of the research topic. In the second section, investigations on the topic are reviewed, the theoretical foundations are summarized, and research hypotheses are formulated. The third section determines the methodology of the study. The fourth section presents the research results, their practical value, recommendations and limitations, and the developed integrated scheme for environment monitoring with regard to the internal control of the procurement process based on a risk-oriented approach taking into consideration the specifics of the fat and oil industry. This section also determines the specifics of the digital techniques used for monitoring the environment and discusses issues surrounding the external monitoring of raw material prices, different types of work, and services based on digital techniques aimed at internal control. In the fifth and final section of the article, the authors analyze the research results and substantiate the prospects for further research in this area. The research results could be used by commercial companies in processing industries which are undergoing digital transformation and developing platform solutions aimed at improving internal control. The main research result of this article is the development of methodical recommendations for monitoring the external environment aimed at the internal control of the procurement process in business based on a risk-oriented approach with the use of digital techniques and a developed integrated monitoring scheme

Operando Laboratory X-ray Absorption Spectroscopy and UV–Vis Study of Pt/TiO₂ Photocatalysts during Photodeposition and Hydrogen Evolution Reactions

Photocatalytic hydrogen (H2) production is a promising route for alternative energetics. Understanding structure–activity relationships is a crucial step towards the rational design of photocatalysts, which requires the application of operando spectroscopy under relevant working conditions. We performed an operando investigation on a catalytic system during the photodeposition of Pt on TiO2 and photostimulated H2 production, using simultaneous laboratory X-ray absorption spectroscopy (XAS), UV–Vis spectroscopy, and mass spectrometry. XAS showed a progressive increase in Pt fluorescence for Pt deposited on TiO2 for over an hour, which is correlated with the signal of the produced H2. The final Pt/TiO2 catalyst contained Pt(0) particles. The electronic features corresponding to the Pt4+ species in the UV–Vis spectrum of the solution disappear as soon as UV radiation is applied in the presence of formic acid, which acts as a hole scavenger, resulting in the presence of Pt(0) particles in solution