The Stability of 4-Chloromethcathinone in Blood and Vitreous Humor

We present results of our study on the stability of 4-chloromethcathinone (4-CMC) in authentic postmortem peripheral blood and vitreous humor samples. The stability of 4-CMC was determined in postmortem blood samples (for a period of 90 days) and vitreous humor (30 days) at three different temperatures: −15°C, +4°C, and + 23°C. The analyses were carried out using ultra-high-performance liquid chromatography coupled with triple-quadrupole tandem mass spectrometry (UHPLC-QqQ-MS/MS). In both materials, the lowest 4-CMC stability was demonstrated at room temperature. The blood samples stored in a freezer (−15°C) showed stability for the entire study period (90 days), while in the case of the vitreous humor sample stored at the same temperature the concentration of the substance decreased by 53% after 30 days. The study carried out in authentic postmortem blood and vitreous humor samples confirms the previous reports of 4-CMC instability in biological material. Authors suggest that the biological material should be stored frozen until analyses are carried out as soon as possible after collection of the material.     

Two Ways of Influence-building: The Eurasian Economic Union and the One Belt,One Road Initiative

Russia and China have been pursuing the Eurasian Economic Union and the One Belt, One Road initiative since the early 2010s, employing two distinct sets of practices in their respective influence-building endeavours. Russia is interested in creating an exclusive sphere of influence in the post-Soviet space, in order to bolster its great power status and secure regional primacy. China, in turn, is expanding its economic influence over a vast geographical area disguising economic expansion behind multilateralism. These differences make Sino–Russian competition in Central Asia less plausible.     

The birth and development of the language of global development in light of trends in global population,international politics,economics and globalisation

The 1940s saw an intensification of worldwide interest in the problems of development and underdevelopment. One consequence of this was a rapid evolution of the language of global development. The reconstruction of its genesis is most commonly attempted through the analysis of literature on the subject and accounts by those who took part in or observed the debates of the time concerning the world’s development and structure. This article proposes a different approach which locates important events in the evolution of the modern language of global development on timelines tracing populational, political, socio-economic and civilisational processes.     

Market failure and stagflation: Some aspects of privatisation in Poland

The paper investigates causes of the stagflation phenomena which appeared in Poland in the period after the ‘shortageflation’, i.e. after February 1990. It is conjectured that one of the primary reasons for the appearance of the stagflation was substantial market uncertainty, which led to a market failure. The theoretical analysis is based on the Newbery-Stiglitz model of futures trading. This reveals that, in the presence of huge price variations a market is likely to fail if a substantial backwardation accompanies negative correlation between prices and quantities. The empirical evidence consists of testing market efficiency (weak and semi-strong forms) and the rational expectations hypothesis for the Polish consumption market and inflation in the period of shortageflation. It is found that the market survives the tests for weak efficiency but fails the test for semi-strong efficiency and rational expectations.     

Application of the micro-FTIR spectroscopy, Raman spectroscopy and XRF method examination of inks

In routine examination of inks on questioned documents non-destructive analytical methods, such as microscopic and optical techniques are applied first. However, they are often insufficient to identify the inks used for the preparation of the document. In such cases, it is necessary to apply chemical methods that normally cause partial destruction of the examined material. The aim of this work was to evaluate the possibility of discrimination between inks by the use of spectrometric methods, i.e. micro-FTIR spectroscopy, Raman spectroscopy and XRF. About 70 samples of blue and black ballpoint pen and gel inks were examined. It was found that about 90% of the samples of the same type and colour could be distinguished using these methods.